Common use of Modifications and Updates to the Wire Center List and Subsequent Transition Periods Clause in Contracts

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 In the event AT&T identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 or 5.4.2.2 above, but that were not included in the Master List of Unimpaired Wire Centers or AT&T’s List of Unimpaired Wire Centers, AT&T shall include such additional wire centers in a CNL. Each such list of additional wire centers shall be considered a Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders. 5.4.6.2 TWTC shall have thirty (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (30) business days after the date of a AT&T CNL providing a Subsequent Wire Center List, AT&T shall not be required to provide DS1 and DS3 Dedicated Transport, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 of this Attachment. 5.4.6.3 For purposes of Section 5.4.6.1 above, AT&T shall make available DS1 and DS3 Dedicated Transport that were in service for TWTC in a wire center on the Subsequent Wire Center List as of the thirtieth (30th) business day after the date of AT&T’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty (180) days after the thirtieth (30th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 No later than one hundred eighty (180) days from AT&T’s CNL identifying the Subsequent Wire Center List, TWTC shall submit an LSR(s) or spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T services. 5.4.6.5.1 In the case of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this Agreement. 5.4.6.6 If TWTC fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of Attachment

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 2.1.4.6.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 or 5.4.2.2 above, Section 2.1.4.2 above but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a carrier notification letter (CNL). Each such list of additional wire centers shall be considered a “Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders”. 5.4.6.2 TWTC shall have thirty 2.1.4.6.2 Effective ten (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (3010) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide unbundle DS1 and and/or DS3 Dedicated TransportLoops, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 of this Attachment1.8 above. 5.4.6.3 2.1.4.6.3 For purposes of Section 5.4.6.1 2.1.4.6 above, AT&T BellSouth shall make available DS1 and DS3 Dedicated Transport Loops that were in service for TWTC NewPhone in a wire center on the Subsequent Wire Center List as of the thirtieth tenth (30th10th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty ninety (18090) days after the thirtieth tenth (30th10th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 2.1.4.6.4 Subsequent disconnects or loss of customers shall be removed from the Subsequent Embedded Base. 2.1.4.6.5 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 2.1.4.6.6 No later than one hundred eighty forty (18040) days from AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List, TWTC NewPhone shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 In . The Parties shall negotiate a project schedule for the case Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this AgreementBase. 5.4.6.6 2.1.4.6.6.1 If TWTC NewPhone fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection 2.1.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 5.2.2.6.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 5.2.2.1 or 5.4.2.2 5.2.2.2 above, but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a CNL. Each such list of additional wire centers shall be considered a Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders. 5.4.6.2 TWTC shall have thirty 5.2.2.6.2 Effective ten (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (3010) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide DS1 and DS3 Dedicated Transport, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 of this Attachment1.8 above. 5.4.6.3 5.2.2.6.3 For purposes of Section 5.4.6.1 above5.2.2.6, AT&T BellSouth shall make available DS1 and DS3 Dedicated Transport that were was in service for TWTC NewPhone in a wire center on the Subsequent Wire Center List as of the thirtieth tenth (30th10th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty ninety (18090) days after the thirtieth tenth (30th10th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 5.2.2.6.4 Subsequent disconnects or loss of customers shall be removed from the Subsequent Embedded Base. 5.2.2.6.5 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 5.2.2.6.6 No later than one hundred eighty forty (18040) days from AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List, TWTC List NewPhone shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 In . The Parties shall negotiate a project schedule for the case Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this AgreementBase. 5.4.6.6 5.2.2.6.6.1 If TWTC NewPhone fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection 5.2.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 5.9.1.5.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 or 5.4.2.2 Section 5.9. 1.2.1 above, but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a CNL. Each such list of additional wire centers shall be considered a “Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders”. 5.4.6.2 TWTC shall have thirty 5.9.1.5.2 Effective ten (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (3010) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide DS1 and DS3 Dedicated unbundled access to Dark Fiber Transport, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 of this Attachment1.8 above. 5.4.6.3 5.9.1.5.3 For purposes of Section 5.4.6.1 above5.9.1.5, AT&T BellSouth shall make available DS1 and DS3 Dedicated Dark Fiber Transport that were was in service for TWTC NewPhone in a wire center on the Subsequent Wire Center List as of the thirtieth tenth (30th10th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty ninety (18090) days after the thirtieth tenth (30th10th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 5.9.1.5.4 Subsequent disconnects or loss of customers shall be removed from the Subsequent Embedded Base. 5.9.1.5.5 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 5.9.1.5.6 No later than one hundred eighty forty (18040) days from AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List, TWTC List NewPhone shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 In . The Parties shall negotiate a project schedule for the case Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this AgreementBase. 5.4.6.6 5.9.1.5.6.1 If TWTC NewPhone fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection 5.9.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 4.2.6.10.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 Section 4.2.6.1 or 5.4.2.2 above4.2.6.4, but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a CNL. Each such list of additional wire centers shall be considered a Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders. 5.4.6.2 TWTC shall have thirty 4.2.6.10.2 Effective ten (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (3010) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide DS1 and DS3 Dedicated Transport, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 1.8 of this Attachment. 5.4.6.3 4.2.6.10.3 For purposes of Section 5.4.6.1 above4.2.6.10, AT&T BellSouth shall make available DS1 and DS3 Dedicated Transport that were was in service for TWTC Comcast Phone in a wire center on the Subsequent Wire Center List as of the thirtieth tenth (30th10th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty (180) 90 days days after the thirtieth tenth (30th10th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 4.2.6.10.4 Subsequent disconnects or loss of End Users shall be removed from the Subsequent Embedded Base. 4.2.6.10.5 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 4.2.6.10.6 No later than one hundred eighty forty (18040) days from AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List, TWTC List Comcast Phone shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 In . The Parties shall negotiate a project schedule for the case Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this AgreementBase. 5.4.6.6 4.2.6.10.6.1 If TWTC Comcast Phone fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection 4.2.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 2.1.4.12.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 or 5.4.2.2 aboveSection 2.1.4.5, but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a carrier notification letter (CNL). Each such list of additional wire centers shall be considered a “Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders”. 5.4.6.2 TWTC shall have thirty 2.1.4.12.2 Effective ten (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (3010) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide unbundle DS1 and and/or DS3 Dedicated TransportLoops, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 1.8 and 1.8.1 of this Attachment. 5.4.6.3 2.1.4.12.3 For purposes of Section 5.4.6.1 above2.1.4.12, AT&T BellSouth shall make available DS1 and DS3 Dedicated Transport Loops that were in service for TWTC Comcast Phone in a wire center on the Subsequent Wire Center List as of the thirtieth tenth (30th10th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty ninety (18090) days after the thirtieth tenth (30th10th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 2.1.4.12.4 Subsequent disconnects or loss of End Users shall be removed from the Subsequent Embedded Base. 2.1.4.12.5 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 2.1.4.12.6 No later than one hundred eighty forty (18040) days from AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List, TWTC Comcast Phone shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 In . The Parties shall negotiate a project schedule for the case Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this AgreementBase. 5.4.6.6 2.1.4.12.6.1 If TWTC Comcast Phone fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection 2.1.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 2.1.4.12.1 In the event AT&T identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 or 5.4.2.2 above, Section 2.1.4.3 above but that were not included in the Master List of Unimpaired Wire Centers or and AT&T’s List of Unimpaired Wire Centers, AT&T shall include such additional wire centers in a carrier notification letter (CNL). Each such list of additional wire centers shall be considered a “Subsequent Wire Center List”. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders. 5.4.6.2 TWTC 2.1.4.12.2 Covad shall have thirty (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (30) business days after the date of a AT&T CNL providing a Subsequent Wire Center List, AT&T shall not be required to provide unbundle DS1 and and/or DS3 Dedicated TransportLoops, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 1.8 of this Attachment. 5.4.6.3 2.1.4.12.2.1 For purposes of Section 5.4.6.1 2.1.4.7 above, AT&T shall make available DS1 and DS3 Dedicated Transport Loops that were in service for TWTC Covad in a wire center on the Subsequent Wire Center List as of the thirtieth (30th) business day after the date of AT&T’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty (180) days after the thirtieth (30th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 2.1.4.12.3 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 2.1.4.12.3.1 No later than one hundred eighty (180) days from AT&T’s CNL identifying the Subsequent Wire Center List, TWTC Covad shall submit an LSR(s) or spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T services. 5.4.6.5.1 2.1.4.12.3.1.1 In the case of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 2.1.4.12.3.1.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this Agreement. 5.4.6.6 If TWTC Covad fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTCCovad’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, and North Carolina and TennesseeCarolina, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentAttachment 2. In the State of Louisiana, those circuits identified and transitioned by AT&T shall be subject to the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. 2.1.4.12.3.1.3 For Subsequent Embedded Base circuits converted pursuant to Section 2.1.4.12.3.1 above or transitioned pursuant to Section 2.1.4. 12.3.1. 2 above, the applicable recurring tariff charges shall apply as of the earlier of the date each circuit is converted or transitioned, as applicable, or the first day after the end of the Subsequent Transition Period.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 2.1.7.12.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 or 5.4.2.2 aboveSection 2.1.7.5, but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a carrier notification letter (“CNL”). Each such list of additional wire centers shall be considered a “Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders”. 5.4.6.2 TWTC shall have thirty 2.1.7.12.2 Effective ten (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (3010) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center ListList that includes one (1) or more additional wire centers, AT&T BellSouth shall not be required to provide unbundle DS1 and and/or DS3 Dedicated TransportLoops, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 1.8 of this Attachment. 5.4.6.3 2.1.7.12.3 For purposes of Section 5.4.6.1 above2.1.7.12, AT&T BellSouth shall make available DS1 and DS3 Dedicated Transport Loops that were in service for TWTC in a wire center on the Subsequent Wire Center List MCI as of the thirtieth tenth (30th10th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (“Subsequent Embedded Base”) until one hundred eighty ninety (18090) days after the thirtieth tenth (30th10th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (“Subsequent Transition Period”). 5.4.6.4 2.1.7.12.4 Subsequent disconnects or loss of customers shall be removed from the Subsequent Embedded Base. 2.1.7.12.5 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 2.1.7.12.6 No later than one hundred eighty forty (18040) days from AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List, TWTC List MCI shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted Converted to other AT&T BellSouth services. 5.4.6.5.1 In , including circuits for those wire centers that MCI disputes as having met the case of disconnection, the applicable disconnect charges thresholds set forth in this Agreement shall applySections 2.1.7.5.1 and 2.1. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this Agreement. 5.4.6.6 If TWTC fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of Attachment

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 6.9.1.10.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 or 5.4.2.2 Section 6.9. 1.4.1 above, but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a CNL. Each such list of additional wire centers shall be considered a “Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders”. 5.4.6.2 TWTC shall have thirty 6.9.1.10.2 Effective ten (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (3010) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide DS1 and DS3 Dedicated unbundled access to Dark Fiber Transport, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 of this Attachment1.8 above. 5.4.6.3 6.9.1.10.3 For purposes of Section 5.4.6.1 above6.9.1.10, AT&T BellSouth shall make available DS1 and DS3 Dedicated Dark Fiber Transport that were was in service for TWTC ITC^DeltaCom in a wire center on the Subsequent Wire Center List as of the thirtieth tenth (30th10th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty ninety (18090) days after the thirtieth tenth (30th10th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 6.9.1.10.4 Subsequent disconnects or loss of End Users shall be removed from the Subsequent Embedded Base. 6.9.1.10.5 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 6.9.1.10.6 No later than one hundred eighty forty (18040) days from AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List, TWTC List ITC^DeltaCom shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 In . The Parties shall negotiate a project schedule for the case Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this AgreementBase. 5.4.6.6 6.9.1.10.6.1 If TWTC ITC^DeltaCom fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection 6.9.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 2.1.4.12.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 or 5.4.2.2 aboveSection 2.1.4.5, but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a carrier notification letter (CNL). Each such list of additional wire centers shall be considered a “Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders”. 5.4.6.2 TWTC shall have thirty 2.1.4.12.2 Effective ten (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (3010) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide unbundle DS1 and and/or DS3 Dedicated TransportLoops, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 1.8 of this Attachment. 5.4.6.3 2.1.4.12.3 For purposes of Section 5.4.6.1 above2.1.4.12, AT&T BellSouth shall make available DS1 and DS3 Dedicated Transport Loops that were in service for TWTC AFN in a wire center on the Subsequent Wire Center List as of the thirtieth tenth (30th10th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty ninety (18090) days after the thirtieth tenth (30th10th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 2.1.4.12.4 Subsequent disconnects or loss of End Users shall be removed from the Subsequent Embedded Base. 2.1.4.12.5 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 2.1.4.12.6 No later than one hundred eighty forty (18040) days from AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List, TWTC AFN shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 In . The Parties shall negotiate a project schedule for the case Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this AgreementBase. 5.4.6.6 2.1.4.12.6.1 If TWTC AFN fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection 2.1.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 6.2.6.10.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 6.2.6.1 or 5.4.2.2 6.2.6.2 above, but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a CNL. Each such list of additional wire centers shall be considered a Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders. 5.4.6.2 TWTC shall have thirty 6.2.6.10.2 Effective ten (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (3010) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide DS1 and DS3 Dedicated Transport, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 of this Attachment1.8 above. 5.4.6.3 6.2.6.10.3 For purposes of Section 5.4.6.1 6.2.6.10 above, AT&T BellSouth shall make available DS1 and DS3 Dedicated Transport that were was in service for TWTC ITC^DeltaCom in a wire center on the Subsequent Wire Center List as of the thirtieth tenth (30th10th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty ninety (18090) days after the thirtieth tenth (30th10th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 6.2.6.10.4 Subsequent disconnects or loss of End Users shall be removed from the Subsequent Embedded Base. 6.2.6.10.5 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 6.2.6.10.6 No later than one hundred eighty forty (18040) days from AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List, TWTC List ITC^DeltaCom shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 In . The Parties shall negotiate a project schedule for the case Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this AgreementBase. 5.4.6.6 6.2.6.10.6.1 If TWTC ITC^DeltaCom fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection 6.2.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 5.9.1.10.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 or 5.4.2.2 above, Section 5.9. 1.4.1 but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a CNL. Each such list of additional wire centers shall be considered a “Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders”. 5.4.6.2 TWTC shall have thirty 5.9.1.10.2 Effective ten (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (3010) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide DS1 and DS3 Dedicated unbundled access to Dark Fiber Transport, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 1.8 of this Attachment. 5.4.6.3 5.9.1.10.3 For purposes of Section 5.4.6.1 above5.9.1.10, AT&T BellSouth shall make available DS1 and DS3 Dedicated Dark Fiber Transport that were was in service for TWTC AFN in a wire center on the Subsequent Wire Center List as of the thirtieth tenth (30th10th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty ninety (18090) days after the thirtieth tenth (30th10th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 5.9.1.10.4 Subsequent disconnects or loss of End Users shall be removed from the Subsequent Embedded Base. 5.9.1.10.5 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 5.9.1.10.6 No later than one hundred eighty forty (18040) days from AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List, TWTC List AFN shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 In . The Parties shall negotiate a project schedule for the case Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this AgreementBase. 5.4.6.6 5.9.1.10.6.1 If TWTC AFN fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection 5.9.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 5.2.2.6.1 In the event AT&T identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 5.2.2.1 or 5.4.2.2 5.2.2.2 above, but that were not included in the Master List of Unimpaired Wire Centers or AT&T’s List of Unimpaired Wire Centers, AT&T shall include such additional wire centers in a CNL. Each such list of additional wire centers shall be considered a Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders. 5.4.6.2 TWTC 5.2.2.6.2 Syniverse shall have thirty (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (30) business days after the date of a an AT&T CNL providing a Subsequent Wire Center List, AT&T shall not be required to provide DS1 and DS3 Dedicated Transport, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 1.8 of this Attachment. 5.4.6.3 5.2.2.6.3 For purposes of Section 5.4.6.1 5.2.2.6 above, AT&T shall make available DS1 and DS3 Dedicated Transport that were in service for TWTC Syniverse in a wire center on the Subsequent Wire Center List as of the thirtieth (30th) business day after the date of AT&T’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty (180) days after the thirtieth (30th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 5.2.2.6.4 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 5.2.2.6.5 No later than one hundred eighty (180) days from AT&T’s CNL identifying the Subsequent Wire Center List, TWTC Syniverse shall submit an LSR(s) or spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T services. 5.4.6.5.1 5.2.2.6.6 In the case of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 5.2.2.6.6.1 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this Agreement. 5.4.6.6 If TWTC Syniverse fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTCSyniverse’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, Georgia and North Carolina and TennesseeCarolina, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentAttachment 2. For the state of Louisiana, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in AT&T’s tariffs. 5.2.2.6.7 For Subsequent Embedded Base circuits converted pursuant to Section 5.2.2.6.5 above or transitioned pursuant to Section 5.2.2.6.6.1 above, the applicable recurring tariff charges shall apply as of the earlier of the date each circuit is converted or transitioned, as applicable, or the first day after the end of the Subsequent Transition Period. 5.2.3 AT&T shall: 5.2.4 Provide Syniverse exclusive use of Dedicated Transport to a particular customer or carrier; 5.2.5 Provide all technically feasible features, functions, and capabilities of Dedicated Transport as outlined within the technical requirements of this section; 5.2.6 Permit, to the extent technically feasible, Syniverse to connect Dedicated Transport to equipment designated by Syniverse, including but not limited to, Syniverse’s collocated facilities; and 5.2.7 Permit, to the extent technically feasible, Syniverse to obtain the functionality provided by AT&T’s digital cross-connect systems. 5.3 AT&T shall offer Dedicated Transport: 5.3.1 As capacity on a shared facility; and 5.3.2 As a circuit (i.e., DS0, DS1, DS3, STS-1) dedicated to Syniverse. 5.4 Dedicated Transport may be provided over facilities such as optical fiber, copper twisted pair, and coaxial cable, and shall include transmission equipment such as line terminating equipment, amplifiers, and regenerators. 5.5 Syniverse may obtain a maximum of twelve (12) unbundled DS3 Dedicated Transport circuits on each Route where DS3 Dedicated Transport is available as a Network Element, and a maximum of ten (10) unbundled DS1 Dedicated Transport circuits on each Route where there is no 251(c)(3) unbundling obligation for DS3 Dedicated Transport, but for which impairment exists for DS1

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 In the event AT&T identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 or 5.4.2.2 above, but that were not included in the Master List of Unimpaired Wire Centers or AT&T’s List of Unimpaired Wire Centers, AT&T shall include such additional wire centers in a CNL. Each such list of additional wire centers shall be considered a Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders. 5.4.6.2 TWTC shall have thirty (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (30) business days after the date of a AT&T CNL providing a Subsequent Wire Center List, AT&T shall not be required to provide DS1 and DS3 Dedicated Transport, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 of this Attachment. 5.4.6.3 For purposes of Section 5.4.6.1 above, AT&T shall make available DS1 and DS3 Dedicated Transport that were in service for TWTC in a wire center on the Subsequent Wire Center List as of the thirtieth (30th) business day after the date of AT&T’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty (180) days after the thirtieth (30th) business day Version: 4Q06 Standard ICA 11/30/06 Page 45 from the date of AT&T’s CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 No later than one hundred eighty (180) days from AT&T’s CNL identifying the Subsequent Wire Center List, TWTC shall submit an LSR(s) or spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T services. 5.4.6.5.1 In the case of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this Agreement. 5.4.6.6 If TWTC fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of Attachment

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 6.9.1.10.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 or 5.4.2.2 above, Section 6.9. 1.4.1 but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a CNL. Each such list of additional wire centers shall be considered a “Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders”. 5.4.6.2 TWTC shall have thirty 6.9.1.10.2 Effective ten (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (3010) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide DS1 and DS3 Dedicated unbundled access to Dark Fiber Transport, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 1.8 of this Attachment. 5.4.6.3 6.9.1.10.3 For purposes of Section 5.4.6.1 above6.9.1.10, AT&T BellSouth shall make available DS1 and DS3 Dedicated Dark Fiber Transport that were was in service for TWTC MRC in a wire center on the Subsequent Wire Center List as of the thirtieth tenth (30th10th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty ninety (18090) days after the thirtieth tenth (30th10th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 6.9.1.10.4 Subsequent disconnects or loss of End Users shall be removed from the Subsequent Embedded Base. 6.9.1.10.5 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 6.9.1.10.6 No later than one hundred eighty forty (18040) days from AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List, TWTC List MRC shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 In . The Parties shall negotiate a project schedule for the case Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this AgreementBase. 5.4.6.6 6.9.1.10.6.1 If TWTC MRC fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection 6.9.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 6.2.6.10.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 Section 6.2.6.1 or 5.4.2.2 above6.2.6.2, but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a CNL. Each such list of additional wire centers shall be considered a Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders. 5.4.6.2 TWTC shall have thirty 6.2.6.10.2 Effective ten (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (3010) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide DS1 and DS3 Dedicated Transport, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 1.8 of this Attachment. 5.4.6.3 6.2.6.10.3 For purposes of Section 5.4.6.1 above6.2.6.10, AT&T BellSouth shall make available DS1 and DS3 Dedicated Transport that were was in service for TWTC MRC in a wire center on the Subsequent Wire Center List as of the thirtieth tenth (30th10th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty ninety (18090) days after the thirtieth tenth (30th10th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 6.2.6.10.4 Subsequent disconnects or loss of End Users shall be removed from the Subsequent Embedded Base. 6.2.6.10.5 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 6.2.6.10.6 No later than one hundred eighty forty (18040) days from AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List, TWTC List MRC shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 In . The Parties shall negotiate a project schedule for the case Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this AgreementBase. 5.4.6.6 6.2.6.10.6.1 If TWTC MRC fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection 6.2.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 5.8.11.1 In the event AT&T identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 or 5.4.2.2 Section 5.8.10.2.1 above, but that were not included in the Master List of Unimpaired Wire Centers or AT&T’s List of Unimpaired Wire Centers, AT&T shall include such additional wire centers in a CNL. Each such list of additional wire centers shall be considered a “Subsequent Wire Center List”. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders. 5.4.6.2 5.8.11.2 TWTC shall have thirty (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective eEffective thirty (30) business days after the date of a AT&T CNL providing a Subsequent Wire Center List, AT&T shall not be required to provide DS1 and DS3 Dedicated unbundled access to Dark Fiber Transport, as applicable, in such additional wire center(s), except pursuant to the self-self- certification process as set forth in Section 1.9.1 of this Attachment. 5.4.6.3 5.8.11.3 For purposes of Section 5.4.6.1 5.8.11.1 above, AT&T shall make available DS1 and DS3 Dedicated Dark Fiber Transport that were was in service for TWTC in a wire center on the Subsequent Wire Center List as of the thirtieth (30th30) business day after the date of AT&T’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty (180) days after the thirtieth (30th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 5.8.11.4 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 5.8.11.5 No later than one hundred eighty (180) days from AT&T’s CNL identifying the Subsequent Wire Center List, TWTC shall submit an LSR(s) or spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T services. 5.4.6.5.1 In the case of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this Agreement. 5.4.6.6 If TWTC fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of Attachment

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 2.1.4.12.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 or 5.4.2.2 Section 2.1.4.5 above, but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a carrier notification letter (CNL). Each such list of additional wire centers shall be considered a “Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders”. 5.4.6.2 TWTC shall have thirty 2.1.4.12.2 Effective ten (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (3010) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide unbundle DS1 and and/or DS3 Dedicated TransportLoops, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 of this Attachment1.8 above. 5.4.6.3 2.1.4.12.3 For purposes of Section 5.4.6.1 2.1.4.12 above, AT&T BellSouth shall make available DS1 and DS3 Dedicated Transport Loops that were in service for TWTC ITC^DeltaCom in a wire center on the Subsequent Wire Center List as of the thirtieth tenth (30th10th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty ninety (18090) days after the thirtieth tenth (30th10th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 2.1.4.12.4 Subsequent disconnects or loss of End Users shall be removed from the Subsequent Embedded Base. 2.1.4.12.5 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 2.1.4.12.6 No later than one hundred eighty forty (18040) days from AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List, TWTC ITC^DeltaCom shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 In . The Parties shall negotiate a project schedule for the case Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this AgreementBase. 5.4.6.6 2.1.4.12.6.1 If TWTC ITC^DeltaCom fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection 2.1.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 5.2.6.10.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 Section 5.2.6.1 or 5.4.2.2 above5.2.6.2, but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a CNL. Each such list of additional wire centers shall be considered a Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders. 5.4.6.2 TWTC shall have thirty 5.2.6.10.2 Effective ten (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (3010) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide DS1 and DS3 Dedicated Transport, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 1.8 of this Attachment. 5.4.6.3 5.2.6.10.3 For purposes of Section 5.4.6.1 above5.2.6.10, AT&T BellSouth shall make available DS1 and DS3 Dedicated Transport that were was in service for TWTC AFN in a wire center on the Subsequent Wire Center List as of the thirtieth tenth (30th10th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty ninety (18090) days after the thirtieth tenth (30th10th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 5.2.6.10.4 Subsequent disconnects or loss of End Users shall be removed from the Subsequent Embedded Base. 5.2.6.10.5 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 5.2.6.10.6 No later than one hundred eighty forty (18040) days from AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List, TWTC List AFN shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 In . The Parties shall negotiate a project schedule for the case Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this AgreementBase. 5.4.6.6 5.2.6.10.6.1 If TWTC AFN fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection 5.2.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 2.1.4.12.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 or 5.4.2.2 aboveSection 2.1.4.5, but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a carrier notification letter (CNL). Each such list of additional wire centers shall be considered a “Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders”. 5.4.6.2 TWTC shall have thirty 2.1.4.12.2 Effective ten (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (3010) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide unbundle DS1 and and/or DS3 Dedicated TransportLoops, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 1.8 of this Attachment. 5.4.6.3 2.1.4.12.3 For purposes of Section 5.4.6.1 above2.1.4.12, AT&T BellSouth shall make available DS1 and DS3 Dedicated Transport Loops that were in service for TWTC MRC in a wire center on the Subsequent Wire Center List as of the thirtieth tenth (30th10th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty ninety (18090) days after the thirtieth tenth (30th10th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 2.1.4.12.4 Subsequent disconnects or loss of End Users shall be removed from the Subsequent Embedded Base. 2.1.4.12.5 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 2.1.4.12.6 No later than one hundred eighty forty (18040) days from AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List, TWTC MRC shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 In . The Parties shall negotiate a project schedule for the case Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this AgreementBase. 5.4.6.6 2.1.4.12.6.1 If TWTC MRC fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection 2.1.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 5.2.6.10.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 Section 5.2.6.1 or 5.4.2.2 above5.2.6.2, but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a CNL. Each such list of additional wire centers shall be considered a Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders. 5.4.6.2 TWTC shall have thirty 5.2.6.10.2 Effective ten (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (3010) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide DS1 and DS3 Dedicated Transport, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 1.8 of this Attachment. 5.4.6.3 5.2.6.10.3 For purposes of Section 5.4.6.1 above5.2.6.10, AT&T BellSouth shall make available DS1 and DS3 Dedicated Transport that were was in service for TWTC Comcast Phone in a wire center on the Subsequent Wire Center List as of the thirtieth tenth (30th10th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty ninety (18090) days after the thirtieth tenth (30th10th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 5.2.6.10.4 Subsequent disconnects or loss of End Users shall be removed from the Subsequent Embedded Base. 5.2.6.10.5 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 5.2.6.10.6 No later than one hundred eighty forty (18040) days from AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List, TWTC List Comcast Phone shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 In . The Parties shall negotiate a project schedule for the case Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this AgreementBase. 5.4.6.6 5.2.6.10.6.1 If TWTC Comcast Phone fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection 5.2.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 6.9.1.10.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 or 5.4.2.2 above, Section 6.9. 1.4.1 but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a CNL. Each such list of additional wire centers shall be considered a “Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders”. 5.4.6.2 TWTC shall have thirty 6.9.1.10.2 Effective ten (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (3010) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide DS1 and DS3 Dedicated unbundled access to Dark Fiber Transport, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 1.8 of this Attachment. 5.4.6.3 6.9.1.10.3 For purposes of Section 5.4.6.1 above6.9.1.10, AT&T BellSouth shall make available DS1 and DS3 Dedicated Transport Loops that were in service for TWTC Home Telecom in a wire center on the Subsequent Wire Center List as of the thirtieth tenth (30th10th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty ninety (18090) days after the thirtieth tenth (30th10th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 6.9.1.10.4 Subsequent disconnects or loss of End Users shall be removed from the Subsequent Embedded Base. 6.9.1.10.5 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 6.9.1.10.6 No later than one hundred eighty forty (18040) days from AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List, TWTC List Home Telecom shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 In . The Parties shall negotiate a project schedule for the case Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this AgreementBase. 5.4.6.6 6.9.1.10.6.1 If TWTC Home Telecom fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection 6.9.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 6.9.1.10.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 or 5.4.2.2 above, Section 6.9. 1.4.1 but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a CNL. Each such list of additional wire centers shall be considered a “Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders”. 5.4.6.2 TWTC shall have thirty 6.9.1.10.2 Effective ten (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (3010) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide DS1 and DS3 Dedicated unbundled access to Dark Fiber Transport, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 1.8 of this Attachment. 5.4.6.3 6.9.1.10.3 For purposes of Section 5.4.6.1 above6.9.1.10, AT&T BellSouth shall make available DS1 and DS3 Dedicated Transport Loops that were in service for TWTC NGTelecom in a wire center on the Subsequent Wire Center List as of the thirtieth tenth (30th10th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty ninety (18090) days after the thirtieth tenth (30th10th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 6.9.1.10.4 Subsequent disconnects or loss of End Users shall be removed from the Subsequent Embedded Base. 6.9.1.10.5 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 6.9.1.10.6 No later than one hundred eighty forty (18040) days from AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List, TWTC List NGTelecom shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 In . The Parties shall negotiate a project schedule for the case Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this AgreementBase. 5.4.6.6 6.9.1.10.6.1 If TWTC NGTelecom fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection 6.9.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 6.2.12.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 or 5.4.2.2 aboveSection 6.2.4, but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a carrier notification letter (“CNL”). Each such list of additional wire centers shall be considered a “Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders”. 5.4.6.2 TWTC shall have thirty (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute6.2.12.2 For FLORIDA, GEORGIA, NORTH CAROLINA and TENNESSEE, effective thirty ten (3010) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center ListList that includes one (1) or more additional wire centers, AT&T BellSouth shall not be required to provide unbundle DS1 and/or DS3 Dedicated Transport, as applicable, in such additional wire center(s), except pursuant to the self- certification process as set forth in Section 1.8 of this Attachment. For ALABAMA, KENTUCKY, LOUISIANA, MISSISSIPPI and SOUTH CAROLINA, effective ten (10) business days after the date of a BellSouth CNL providing a Subsequent Wire Center List that includes one (1) or more additional wire centers, BellSouth shall not be required to unbundle DS1 and/or DS3 Dedicated Transport, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 1.8 of this Attachment. 5.4.6.3 6.2.12.3 For purposes of Section 5.4.6.1 above6.2.12, AT&T BellSouth shall make available DS1 and DS3 Dedicated Transport that were was in service for TWTC MCI in a wire center on the Subsequent Wire Center List as of the thirtieth tenth (30th10th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty ninety (18090) days after the thirtieth tenth (30th10th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 6.2.12.4 Subsequent disconnects or loss of customers shall be removed from the Subsequent Embedded Base. 6.2.12.5 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 No later than one hundred eighty (180) days from AT&T’s CNL identifying the Subsequent Wire Center List, TWTC shall submit an LSR(s) or spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T services. 5.4.6.5.1 In the case of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this Agreement. 5.4.6.6 If TWTC fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of Attachment

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 5.2.6.10.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 5.2.6.1 or 5.4.2.2 5.2.6.2 above, but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a CNL. Each such list of additional wire centers shall be considered a Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders. 5.4.6.2 TWTC shall have thirty 5.2.6.10.2 Effective ten (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (3010) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide DS1 and DS3 Dedicated Transport, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 of this Attachment1.5 above. 5.4.6.3 5.2.6.10.3 For purposes of Section 5.4.6.1 5.2.6.10 above, AT&T BellSouth shall make available DS1 and DS3 Dedicated Transport that were was in service for TWTC Midwestern in a wire center on the Subsequent Wire Center List as of the thirtieth tenth (30th10th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty ninety (18090) days after the thirtieth tenth (30th10th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 5.2.6.10.4 Subsequent disconnects or loss of End Users shall be removed from the Subsequent Embedded Base. 5.2.6.10.5 The rates set forth in Exhibit B A of Attachment 2 of the Agreement plus 15% shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 5.2.6.10.6 No later than one hundred eighty forty (18040) days from AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List, TWTC List Midwestern shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 In . The Parties shall negotiate a project schedule for the case Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this AgreementBase. 5.4.6.6 5.2.6.10.6.1 If TWTC Midwestern fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection 5.2.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 2.1.4.12.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 or 5.4.2.2 Section 2.1.4.5 above, but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a carrier notification letter (CNL). Each such list of additional wire centers shall be considered a “Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders”. 5.4.6.2 TWTC shall have thirty 2.1.4.12.2 Effective ten (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (3010) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide unbundle DS1 and and/or DS3 Dedicated TransportLoops, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 1.5 of this Attachment. 5.4.6.3 2.1.4.12.3 For purposes of Section 5.4.6.1 2.1.4.12 above, AT&T BellSouth shall make available DS1 and DS3 Dedicated Transport Loops that were in service for TWTC Level 3 in a wire center on the Subsequent Wire Center List as of the thirtieth tenth (30th10th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty ninety (18090) days after the thirtieth tenth (30th10th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 2.1.4.12.4 Subsequent disconnects or loss of End Users shall be removed from the Subsequent Embedded Base. 2.1.4.12.5 The rates set forth in Exhibit B A of Attachment 2 of the Agreement plus 15% shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 2.1.4.12.6 No later than one hundred eighty forty (18040) days from AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List, TWTC Level 3 shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 In . The Parties shall negotiate a project schedule for the case Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this AgreementBase. 5.4.6.6 2.1.4.12.6.1 If TWTC Level 3 fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection 2.1.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 2.1.4.12.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 or 5.4.2.2 aboveSection 2.1.4.5, but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a carrier notification letter (CNL). Each such list of additional wire centers shall be considered a “Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders”. 5.4.6.2 TWTC shall have thirty 2.1.4.12.2 Effective ten (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (3010) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide unbundle DS1 and and/or DS3 Dedicated TransportLoops, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 1.8 of this Attachment. 5.4.6.3 2.1.4.12.3 For purposes of Section 5.4.6.1 above2.1.4.12, AT&T BellSouth shall make available DS1 and DS3 Dedicated Transport Loops that were in service for TWTC U-Dial in a wire center on the Subsequent Wire Center List as of the thirtieth tenth (30th10th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty ninety (18090) days after the thirtieth tenth (30th10th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 2.1.4.12.4 Subsequent disconnects or loss of End Users shall be removed from the Subsequent Embedded Base. 2.1.4.12.5 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 2.1.4.12.6 No later than one hundred eighty forty (18040) days from AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List, TWTC U-Dial shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 In . The Parties shall negotiate a project schedule for the case Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this AgreementBase. 5.4.6.6 2.1.4.12.6.1 If TWTC U-Dial fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection 2.1.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 6.2.6.10.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 Section 6.2.6.1 or 5.4.2.2 above6.2.6.2, but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a CNL. Each such list of additional wire centers shall be considered a Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders. 5.4.6.2 TWTC shall have thirty 6.2.6.10.2 Effective ten (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (3010) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide DS1 and DS3 Dedicated Transport, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 1.8 of this Attachment. 5.4.6.3 6.2.6.10.3 For purposes of Section 5.4.6.1 above6.2.6.10, AT&T BellSouth shall make available DS1 and DS3 Dedicated Transport that were was in service for TWTC GSC in a wire center on the Subsequent Wire Center List as of the thirtieth tenth (30th10th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty ninety (18090) days after the thirtieth tenth (30th10th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 6.2.6.10.4 Subsequent disconnects or loss of End Users shall be removed from the Subsequent Embedded Base. 6.2.6.10.5 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 6.2.6.10.6 No later than one hundred eighty forty (18040) days from AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List, TWTC List GSC shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 In . The Parties shall negotiate a project schedule for the case Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this AgreementBase. 5.4.6.6 6.2.6.10.6.1 If TWTC GSC fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection 6.2.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 2.1.4.12.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 or 5.4.2.2 aboveSection 2.1.4.5, but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a carrier notification letter (CNL). Each such list of additional wire centers shall be considered a “Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders”. 5.4.6.2 TWTC shall have thirty 2.1.4.12.2 Effective ten (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (3010) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide unbundle DS1 and and/or DS3 Dedicated TransportLoops, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 1.8 of this Attachment. 5.4.6.3 2.1.4.12.3 For purposes of Section 5.4.6.1 above2.1.4.12, AT&T BellSouth shall make available DS1 and DS3 Dedicated Transport Loops that were in service for TWTC GSC in a wire center on the Subsequent Wire Center List as of the thirtieth tenth (30th10th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty ninety (18090) days after the thirtieth tenth (30th10th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 2.1.4.12.4 Subsequent disconnects or loss of End Users shall be removed from the Subsequent Embedded Base. 2.1.4.12.5 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 2.1.4.12.6 No later than one hundred eighty forty (18040) days from AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List, TWTC GSC shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 In . The Parties shall negotiate a project schedule for the case Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this AgreementBase. 5.4.6.6 2.1.4.12.6.1 If TWTC GSC fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection 2.1.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 5.2.2.6.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 5.2.2.1 or 5.4.2.2 5.2.2.2 above, but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a CNL. Each such list of additional wire centers shall be considered a Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders. 5.4.6.2 TWTC shall have thirty 5.2.2.6.2 Effective ten (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (3010) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide DS1 and DS3 Dedicated Transport, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 of this Attachment1.8 above. 5.4.6.3 5.2.2.6.3 For purposes of Section 5.4.6.1 above5.2.2.6, AT&T BellSouth shall make available DS1 and DS3 Dedicated Transport that were was in service for TWTC TeraBlue in a wire center on the Subsequent Wire Center List as of the thirtieth tenth (30th10th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty ninety (18090) days after the thirtieth tenth (30th10th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 5.2.2.6.4 Subsequent disconnects or loss of customers shall be removed from the Subsequent Embedded Base. 5.2.2.6.5 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 5.2.2.6.6 No later than one hundred eighty forty (18040) days from AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List, TWTC List TeraBlue shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 In . The Parties shall negotiate a project schedule for the case Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this AgreementBase. 5.4.6.6 5.2.2.6.6.1 If TWTC TeraBlue fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection 5.2.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 In the event AT&T identifies 5.2.6.13.1 BellSouth may seek to designate additional wire centers that meet as “non-impaired” pursuant to the criteria set forth in Sections 5.4.2.1 or 5.4.2.2 above, but that were not included 47 C.F.R. 51.319 based upon either (1) an increase in the Master List business line count or (2) an increase in the number of Unimpaired Wire Centers or AT&T’s List fiber based collocators (“FBCs”) for such wire centers. For non-impairment designations based upon the business line count, BellSouth shall, no later than June 30 of Unimpaired Wire Centerseach year, AT&T file with the Commission the proposed list of such additional “non-impaired” wire centers. For non-impairment designations based upon an increase in the number of FBCs, BellSouth has the option of filing with the Commission, at any time during the year, the proposed list of such additional “non-impaired” wire centers. The list of additional “non-impaired” wire centers as designated by BellSouth shall include reflect the number of business lines, as of December 31 of the previous year based upon its ARMIS 43 08 data filed with the FCC and/or shall reflect the current number of FBCs in each wire center, as applicable, and to the extent BellSouth relies upon such information to make its designation. In no event shall BellSouth make more than two such non-impairment designation filings per state in a given calendar year for non-impairment designations. 5.2.6.13.2 To the extent BellSouth identifies additional wire centers as non-impaired, based upon an increase in the number of FBCs, BellSouth shall identify the FBCs upon which it has relied, and shall obtain from each collocator, prior to filing, a CNLwritten affirmation that it qualifies as a FBC. Each CLEC shall, within 20 days of a request by BellSouth, affirm or deny that it constitutes a fiber-based collocator, as defined in 47 C.F.R. 51.5. In the event that CLEC is listed as a FBC and denies such list of status, CLEC shall provide BellSouth with all information and documentation reasonably necessary to support such position at the same time that CLEC makes such assertion. 5.2.6.13.3 In any such filing designating additional wire centers shall as “non-impaired,” BellSouth shall, to the extent applicable, file the following documentation demonstrating that each additional wire center meets the relevant TRRO criteria. BellSouth agrees to make such documentation available to US LEC under the terms of a Commission protective order. Provided, however, to the extent a Commission requires different information to be considered a Subsequent Wire Center List. AT&T provided in support of BellSouth’s designation of an additional wire center as non-impaired, the Parties will follow any limitations on the frequency with which it may issue work cooperatively to utilize such lists new Commission requirements, and notification procedures set forth in applicable Commission ordersamend this Agreement accordingly, if necessary. 5.4.6.2 TWTC a. The CLLI of the wire center. b. The number of switched business lines served by BellSouth in that wire center based upon data as reported in ARMIS 43-08 for the previous year. c. The number of UNE-P or equivalent lines used to serve business customers (UNE-P lines serving residential customers shall not be counted as business lines in BellSouth’s analysis). d. The number of DS0 (non-high capacity) UNE-L lines in service. e. The number of DS1 UNE-L lines in service (DS0 equivalent line count). f. The number of DS1 UNE EELs (DS0 equivalent line count). g. The number of DS3 UNE-L lines in service (DS0 equivalent line count). h. The number of DS3 EELs (DS0 equivalent line count). i. A completed worksheet that shows, in detail, any conversion of digital access lines to voice grade equivalents and any resulting adjustments. j. The names of any carriers relied upon as a FBC, and the wire center in which each was relied upon. 5.2.6.13.4 US LEC shall have thirty (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (30) business days after from the date of BellSouth’s non-impairment designation filing to file a AT&T CNL providing challenge with the Commission to any such additional non-impaired wire center designated by BellSouth. Any such challenge must be specific, supported by evidence or verified statement refuting the data supplied by BellSouth and sufficient for the Commission to render a final determination. 5.2.6.13.5 Changes to the wire center designations shall become effective sixty (60) days following such filing by BellSouth with the Commission or the date such designations are approved by the Commission, whichever is earlier. The additional Non-impaired Wire Centers shall be considered “Subsequent Wire Center ListCenters.” As of such effective date, AT&T BellSouth shall not be required to provide provide, and US LEC shall not add, new DS1 or DS3 Dedicated Transport circuits, Excess DS1 and DS3 Dedicated Transport, as applicable, in Subsequent Wire Centers. 5.2.6.13.6 For purposes of this section, Subsequent Embedded Base shall mean those DS1 and/or DS3 Dedicated Transport, as applicable, that were in service for US LEC or for which US LEC had orders pending in a Subsequent Wire Center on the effective date of the non-impairment designation and shall include any DS3 Dedicated Transport circuits in excess of the caps set forth in this Agreement in such additional wire center(s), except pursuant to Subsequent Wire Centers. Disconnects or loss of End Users shall be removed from the selfSubsequent Embedded base. 5.2.6.13.7 Within thirty (30) days of the non-certification process impairment designation effective date as set forth in Section 1.9.1 of this Attachment. 5.4.6.3 For purposes of Section 5.4.6.1 above5.2.6.9, AT&T CLEC shall make available DS1 and DS3 Dedicated Transport that were in service for TWTC in a wire center on the Subsequent Wire Center List as of the thirtieth (30th) business day after the date of AT&T’s CNL identifying the Subsequent Wire Center List (identify its Subsequent Embedded Base) until one hundred eighty (180) days after the thirtieth (30th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 The rates Base via a spreadsheet, as set forth in on BellSouth’s Interconnection Web site and attached hereto as Exhibit B D. Such spreadsheet shall apply to identify the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 No later than one hundred eighty (180) days from AT&T’s CNL identifying the Subsequent Wire Center List, TWTC shall submit an LSR(s) or spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 In . CLEC shall have thirty (30) days from submission of such spreadsheet to make modifications or corrections to the case spreadsheet. BellSouth will begin Conversion of disconnectionsuch circuits no earlier than the sixtieth (60TH) day following the non-impairment designation effective date. Such Conversions shall be pursuant to Section 1.6. Recurring tariff rates, terms and conditions shall apply upon Conversion of the applicable disconnect charges circuits to wholesale services. CLEC shall pay the UNE rate set forth in this Agreement shall applyuntil such time as BellSouth Converts the circuit. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of 5.2.6.13.8 In the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this Agreement. 5.4.6.6 If TWTC event US LEC fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base described above as requested by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center ListBellSouth, AT&T BellSouth will identify TWTC’s US LEC's remaining Subsequent Embedded Base, if any, and will may begin transition of such circuits immediately to the equivalent wholesale tariffed AT&T BellSouth service(s), or in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those Those circuits identified and transitioned by AT&T BellSouth shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T BellSouth service as set forth in AT&TBellSouth's tariffs upon such transition. The applicable recurring tariff rates, terms and conditions shall apply as of the date such circuit is transitioned. 5.2.6.13.9 In the event that (1) BellSouth designates a wire center as non-impaired, either initially or as a Subsequent Wire Center, (2) as a result of such designation, US LEC Converts existing Network Elements or Combinations to other services or orders new services as services other than Network Elements or Combinations, (3) US LEC otherwise would have been entitled to Network Elements or Combinations in such wire center at the time such alternative services were provisioned, and (4) BellSouth acknowledges, or a state or federal regulatory body with authority determines, that, at the time BellSouth designated such wire center as non-impaired, such wire center did not meet the FCC’s tariffsnon-impairment criteria, then upon request of US LEC, no later than sixty (60) days after BellSouth acknowledges or the State or Federal Regulatory body issues an Order making such a finding, BellSouth shall transition to Network Elements or Combinations any alternative services in such wire center that were established after such wire center was designated as non-impaired. In such instances, BellSouth shall credit US LEC the states difference between the rate paid by US LEC for such services and the applicable Network Element or Combinations rate, including but not limited to any charges associated with the resulting conversion from Network Element or Combinations to other wholesale services or group of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and wholesale services for the period prior to such circuit being transitioned by AT&T to a Network Element or Combination. Such credit shall be subject to calculated from June 1, 2005, for a Non-impaired Wire Center meeting the applicable switch-as-is rates criteria set forth in Exhibit A this Section. For a Subsequent Wire Center, the credit shall be calculated from the date of Attachmentthe Conversion of the Network Element or Combination to the other services or if a new service was ordered instead of a Network Element or Combination, the date such new service was provisioned by BellSouth. There shall be no additional charge for such transition to Network Elements or Combination services. US LEC shall only be responsible for such charges as would have applied if said Wire Center had not been designated as non- impaired.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 5.2.6.10.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 Section 5.2.6.1 or 5.4.2.2 above5.2.6.2, but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a CNL. Each such list of additional wire centers shall be considered a Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders. 5.4.6.2 TWTC shall have thirty 5.2.6.10.2 Effective fourteen (3014) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (30) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide DS1 and DS3 Dedicated Transport, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 1.6 of this Attachment. 5.4.6.3 5.2.6.10.3 For purposes of Section 5.4.6.1 above5.2.6.10, AT&T BellSouth shall make available DS1 and DS3 Dedicated Transport that were was in service for TWTC TCG in a wire center on the Subsequent Wire Center List as of the thirtieth fourteen (30th14th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty and twenty (180120) days after the thirtieth fourteenth (30th14th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 5.2.6.10.4 Subsequent disconnects or loss of End Users shall be removed from the Subsequent Embedded Base. 5.2.6.10.5 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 5.2.6.10.6 No later than one hundred eighty sixty (18060) days from AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List, TWTC List TCG shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 In . The Parties shall negotiate a project schedule for the case Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this AgreementBase. 5.4.6.6 5.2.6.10.6.1 If TWTC TCG fails to submit the LSR(s) or spreadsheet(s) specified in Section 5.1.6.10.6 above for all 95% or more of its Subsequent Embedded Base by one hundred eighty within sixty (18060) days after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List, AT&T BellSouth will identify TWTC’s TCG's remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T BellSouth service(s), or in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those Those circuits identified and transitioned by AT&T BellSouth shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T BellSouth service as set forth in AT&T’s BellSouth's tariffs. In If it is determined that TCG failed to submit spreadsheets or to convert 5% or less of its Subsequent Embedded Base, BellSouth will not convert such 5% or less of TCG's Subsequent Embedded Base, but will alert TCG of the states 5% or less of Alabamaits Subsequent Embedded Base that was not converted by TCG and allow TCG thirty (30) days to convert such 5% or less of its Subsequent Embedded Base. To the extent TCG fails to convert the remaining Subsequent Embedded Base within such thirty (30) day period, GeorgiaBellSouth will identify and transition such circuits as described in this paragraph. 5.2.6.10.6.2 For Subsequent Embedded Base circuits converted pursuant to Section 5.2.6.10.6 or transitioned pursuant to Section 5.2.6.10.6.1, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-recurring tariff charges shall apply as of the earlier of the date each circuit is rates set forth in Exhibit A converted or transitioned, as applicable, or the first day after the end of Attachmentthe Subsequent Transition Period.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 6.9.1.12.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 or 5.4.2.2 above, Section 6.9. 1.5.1 but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a CNL. Each such list of additional wire centers shall be considered a “Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders”. 5.4.6.2 TWTC shall have 6.9.1.12.2 Effective thirty (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (30) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide DS1 and DS3 Dedicated unbundled access to Dark Fiber Transport, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 1.8 of this Attachment. 5.4.6.3 6.9.1.12.3 For purposes of Section 5.4.6.1 above6.9.1.11, AT&T BellSouth shall make available DS1 and DS3 Dedicated Dark Fiber Transport that were in service for TWTC Sprint in a wire center on the Subsequent Wire Center List as of the thirtieth (30th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty and fifty (180150) days after the thirtieth (30th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 6.9.1.12.4 Subsequent disconnects or loss of End Users shall be removed from the Subsequent Embedded Base. 6.9.1.12.5 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 6.9.1.12.6 No later than one hundred eighty sixty (18060) days from AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List, TWTC Sprint shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 In . The Parties shall negotiate a project schedule for the case Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this AgreementBase. 5.4.6.6 6.9.1.12.6.1 If TWTC Sprint fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection 6.9.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 6.2.6.10.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 Section 6.2.6.1 or 5.4.2.2 above6.2.6.2, but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a CNL. Each such list of additional wire centers shall be considered a Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders. 5.4.6.2 TWTC shall have thirty 6.2.6.10.2 Effective ten (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (3010) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide DS1 and DS3 Dedicated Transport, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 1.8 of this Attachment. 5.4.6.3 6.2.6.10.3 For purposes of Section 5.4.6.1 above6.2.6.10, AT&T BellSouth shall make available DS1 and DS3 Dedicated Transport that were was in service for TWTC U-Dial in a wire center on the Subsequent Wire Center List as of the thirtieth tenth (30th10th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty ninety (18090) days after the thirtieth tenth (30th10th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 6.2.6.10.4 Subsequent disconnects or loss of End Users shall be removed from the Subsequent Embedded Base. 6.2.6.10.5 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 6.2.6.10.6 No later than one hundred eighty forty (18040) days from AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List, TWTC List U-Dial shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 In . The Parties shall negotiate a project schedule for the case Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this AgreementBase. 5.4.6.6 6.2.6.10.6.1 If TWTC U-Dial fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection 6.2.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 5.6.3.10.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 or 5.4.2.2 aboveSection 5.6.3.4.1, but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a CNL. Each such list of additional wire centers shall be considered a “Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders”. 5.4.6.2 TWTC shall have thirty 5.6.3.10.2 Effective fourteen (3014) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (30) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide DS1 and DS3 Dedicated unbundled access to Dark Fiber Transport, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 1.6 of this Attachment. 5.4.6.3 5.6.3.10.3 For purposes of Section 5.4.6.1 above5.6.3.10, AT&T BellSouth shall make available DS1 and DS3 Dedicated Dark Fiber Transport that were in service for TWTC AT&T in a wire center on the Subsequent Wire Center List as of the thirtieth tenth (30th14th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty and twenty (180120) days after the thirtieth fourteenth (30th14th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 5.6.3.10.4 Subsequent disconnects or loss of End Users shall be removed from the Subsequent Embedded Base. 5.6.3.10.5 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 5.6.3.10.6 No later than one hundred eighty sixty (18060) days from AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List, TWTC List AT&T shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 In . The Parties agree to work cooperatively to confirm that the case of disconnection, facilities on the applicable disconnect charges set forth spreadsheet are the facilities to be included in this Agreement AT&T’s Subsequent Embedded Base. The Parties shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as negotiate a project schedule for the Conversion of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from Subsequent Embedded Base. BellSouth shall charge the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the non-recurring switch-as-is charge set forth in Exhibit A to this Attachment 2rate for these conversions. 5.4.6.5.3 5.6.3.10.6.1 If AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this Agreement. 5.4.6.6 If TWTC fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection 5.6.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 2.1.4.12.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 or 5.4.2.2 Section 2.1.4.5 above, but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a carrier notification letter (CNL). Each such list of additional wire centers shall be considered a “Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders”. 5.4.6.2 TWTC shall have thirty 2.1.4.12.2 Effective ten (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (3010) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide unbundle DS1 and and/or DS3 Dedicated TransportLoops, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 of this Attachment1.8 above. 5.4.6.3 2.1.4.12.3 For purposes of Section 5.4.6.1 2.1.4.12 above, AT&T BellSouth shall make available DS1 and DS3 Dedicated Transport Loops that were in service for TWTC Global Dialtone in a wire center on the Subsequent Wire Center List as of the thirtieth tenth (30th10th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty ninety (18090) days after the thirtieth tenth (30th10th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 2.1.4.12.4 Subsequent disconnects or loss of customers shall be removed from the Subsequent Embedded Base. 2.1.4.12.5 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 2.1.4.12.6 No later than one hundred eighty forty (18040) days from AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List, TWTC Global Dialtone shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 In . The Parties shall negotiate a project schedule for the case Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this AgreementBase. 5.4.6.6 2.1.4.12.6.1 If TWTC Global Dialtone fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection 2.1.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 5.9.1.10.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 or 5.4.2.2 above, Section 5.9. 1.4.1 but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a CNL. Each such list of additional wire centers shall be considered a “Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders”. 5.4.6.2 TWTC shall have thirty 5.9.1.10.2 Effective ten (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (3010) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide DS1 and DS3 Dedicated unbundled access to Dark Fiber Transport, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 1.8 of this Attachment. 5.4.6.3 5.9.1.10.3 For purposes of Section 5.4.6.1 above5.9.1.10, AT&T BellSouth shall make available DS1 and DS3 Dedicated Transport Loops that were in service for TWTC Birch in a wire center on the Subsequent Wire Center List as of the thirtieth tenth (30th10th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty ninety (18090) days after the thirtieth tenth (30th10th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 5.9.1.10.4 Subsequent disconnects or loss of End Users shall be removed from the Subsequent Embedded Base. 5.9.1.10.5 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 5.9.1.10.6 No later than one hundred eighty forty (18040) days from AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List, TWTC List Birch shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 In . The Parties shall negotiate a project schedule for the case Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this AgreementBase. 5.4.6.6 5.9.1.10.6.1 If TWTC Xxxxx fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection 5.9.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 2.1.1.8.12.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 or 5.4.2.2 aboveSection 2.1.1.8.5, but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a carrier notification letter (CNL). Each such list of additional wire centers shall be considered a “Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders”. 5.4.6.2 TWTC shall have thirty 2.1.1.8.12.2 Effective fourteen (3014) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (30) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide unbundle DS1 and and/or DS3 Dedicated TransportLoops, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 1.6 of this Attachment. 5.4.6.3 2.1.1.8.12.3 For purposes of Section 5.4.6.1 above2.1.1.8.12, AT&T BellSouth shall make available DS1 and DS3 Dedicated Transport Loops that were in service for TWTC AT&T in a wire center on the Subsequent Wire Center List as of the thirtieth fourteenth (30th14th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty and twenty (180120) days after the thirtieth fourteenth (30th14th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 2.1.1.8.12.4 Subsequent disconnects or loss of End Users shall be removed from the Subsequent Embedded Base. 2.1.1.8.12.5 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 2.1.1.8.12.6 No later than one hundred eighty sixty (18060) days from AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List, TWTC AT&T shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 In . The Parties agree to work cooperatively to confirm that the case facilities on the spreadsheet are the facilities to be included in AT&T’s Subsequent Embedded Base. The Parties shall negotiate a project schedule for the Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of Base. BellSouth shall charge the Effective Date of this Agreementnon-recurring switch-as- is rate for these conversions. 5.4.6.6 2.1.1.8.12.6.1 If TWTC AT&T fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection 2.1.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 2.1.4.12.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 or 5.4.2.2 Section 2.1.4.5 above, but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a carrier notification letter (CNL). Each such list of additional wire centers shall be considered a “Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders”. 5.4.6.2 TWTC shall have thirty 2.1.4.12.2 Effective fourteen (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (3014) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide unbundle DS1 and and/or DS3 Dedicated TransportLoops, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 of this Attachment1.8 above. 5.4.6.3 2.1.4.12.3 For purposes of Section 5.4.6.1 2.1.4.12 above, AT&T BellSouth shall make available DS1 and DS3 Dedicated Transport Loops that were in service for TWTC Southern Digital in a wire center on the Subsequent Wire Center List as of the thirtieth fourteenth (30th14th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty twenty (180120) days after the thirtieth fourteenth (30th14th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 2.1.4.12.4 Subsequent disconnects or loss of End Users shall be removed from the Subsequent Embedded Base. 2.1.4.12.5 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 2.1.4.12.6 No later than one hundred eighty sixty (18060) days from AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List, TWTC Southern Digital shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 In . The Parties shall negotiate a project schedule for the case Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this AgreementBase. 5.4.6.6 2.1.4.12.6.1 If TWTC Southern Digital fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection 2.1.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 2.1.4.12.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 or 5.4.2.2 aboveSection 2.1.4.5, but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a carrier notification letter (CNL). Each such list of additional wire centers shall be considered a “Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders”. 5.4.6.2 TWTC shall have thirty 2.1.4.12.2 Effective ten (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (3010) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide unbundle DS1 and and/or DS3 Dedicated TransportLoops, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 1.8 of this Attachment. 5.4.6.3 2.1.4.12.3 For purposes of Section 5.4.6.1 above2.1.4.12, AT&T BellSouth shall make available DS1 and DS3 Dedicated Transport Loops that were in service for TWTC Kinetix in a wire center on the Subsequent Wire Center List as of the thirtieth tenth (30th10th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty ninety (18090) days after the thirtieth tenth (30th10th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 2.1.4.12.4 Subsequent disconnects or loss of End Users shall be removed from the Subsequent Embedded Base. 2.1.4.12.5 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 2.1.4.12.6 No later than one hundred eighty forty (18040) days from AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List, TWTC Kinetix shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 In . The Parties shall negotiate a project schedule for the case Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this AgreementBase. 5.4.6.6 2.1.4.12.6.1 If TWTC Kinetix fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection 2.1.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 2.1.4.12.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 or 5.4.2.2 Section 2.1.4.5 above, but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a carrier notification letter (CNL). Each such list of additional wire centers shall be considered a “Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders”. 5.4.6.2 TWTC shall have thirty 2.1.4.12.2 Effective ten (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (3010) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide unbundle DS1 and and/or DS3 Dedicated TransportLoops, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 1.5 of this Attachment. 5.4.6.3 2.1.4.12.3 For purposes of Section 5.4.6.1 2.1.4.12 above, AT&T BellSouth shall make available DS1 and DS3 Dedicated Transport Loops that were in service for TWTC PBT in a wire center on the Subsequent Wire Center List as of the thirtieth tenth (30th10th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty ninety (18090) days after the thirtieth tenth (30th10th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 2.1.4.12.4 Subsequent disconnects or loss of End Users shall be removed from the Subsequent Embedded Base. 2.1.4.12.5 The rates set forth in Exhibit B of Attachment 2 of the Agreement plus 15% shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 2.1.4.12.6 No later than one hundred eighty forty (18040) days from AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List, TWTC PBT shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 In . The Parties shall negotiate a project schedule for the case Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this AgreementBase. 5.4.6.6 2.1.4.12.6.1 If TWTC PBT fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection 2.1.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 6.9.1.10.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 or 5.4.2.2 above, Section 6.9. 1.4.1 but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a CNL. Each such list of additional wire centers shall be considered a “Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders”. 5.4.6.2 TWTC shall have thirty 6.9.1.10.2 Effective ten (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (3010) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide DS1 and DS3 Dedicated unbundled access to Dark Fiber Transport, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 1.8 of this Attachment. 5.4.6.3 6.9.1.10.3 For purposes of Section 5.4.6.1 above6.9.1.10, AT&T BellSouth shall make available DS1 and DS3 Dedicated Transport Loops that were in service for TWTC Aero in a wire center on the Subsequent Wire Center List as of the thirtieth tenth (30th10th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty ninety (18090) days after the thirtieth tenth (30th10th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 6.9.1.10.4 Subsequent disconnects or loss of End Users shall be removed from the Subsequent Embedded Base. 6.9.1.10.5 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 6.9.1.10.6 No later than one hundred eighty forty (18040) days from AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List, TWTC List Aero shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 In . The Parties shall negotiate a project schedule for the case Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this AgreementBase. 5.4.6.6 6.9.1.10.6.1 If TWTC Aero fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection 6.9.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 6.2.6.10.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 Section 6.2.6.1 or 5.4.2.2 above6.2.6.2, but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a CNL. Each such list of additional wire centers shall be considered a Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders. 5.4.6.2 TWTC shall have thirty 6.2.6.10.2 Effective ten (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (3010) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide DS1 and DS3 Dedicated Transport, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 1.8 of this Attachment. 5.4.6.3 6.2.6.10.3 For purposes of Section 5.4.6.1 above6.2.6.10, AT&T BellSouth shall make available DS1 and DS3 Dedicated Transport that were was in service for TWTC Home Telecom in a wire center on the Subsequent Wire Center List as of the thirtieth tenth (30th10th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty ninety (18090) days after the thirtieth tenth (30th10th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 6.2.6.10.4 Subsequent disconnects or loss of End Users shall be removed from the Subsequent Embedded Base. 6.2.6.10.5 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 6.2.6.10.6 No later than one hundred eighty forty (18040) days from AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List, TWTC List Home Telecom shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 In . The Parties shall negotiate a project schedule for the case Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this AgreementBase. 5.4.6.6 If TWTC fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of Attachment

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 5.2.6.10.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 Section 5.2.6.1 or 5.4.2.2 above5.2.6.2, but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a CNL. Each such list of additional wire centers shall be considered a Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders. 5.4.6.2 TWTC shall have thirty 5.2.6.10.2 Effective ten (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (3010) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide DS1 and DS3 Dedicated Transport, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 1.8 of this Attachment. 5.4.6.3 5.2.6.10.3 For purposes of Section 5.4.6.1 above5.2.6.10, AT&T BellSouth shall make available DS1 and DS3 Dedicated Transport that were was in service for TWTC EZ Communications in a wire center on the Subsequent Wire Center List as of the thirtieth tenth (30th10th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty ninety (18090) days after the thirtieth tenth (30th10th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 5.2.6.10.4 Subsequent disconnects or loss of End Users shall be removed from the Subsequent Embedded Base. 5.2.6.10.5 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 5.2.6.10.6 No later than one hundred eighty forty (18040) days from AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List, TWTC List EZ Communications shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 In . The Parties shall negotiate a project schedule for the case Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this AgreementBase. 5.4.6.6 5.2.6.10.6.1 If TWTC EZ Communications fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 2.1.4.12.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 or 5.4.2.2 Section 2.1.4.5 above, but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a carrier notification letter (CNL). Each such list of additional wire centers shall be considered a “Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders”. 5.4.6.2 TWTC shall have thirty 2.1.4.12.2 Effective ten (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (3010) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide unbundle DS1 and and/or DS3 Dedicated TransportLoops, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 1.5 of this Attachment. 5.4.6.3 2.1.4.12.3 For purposes of Section 5.4.6.1 2.1.4.12 above, AT&T BellSouth shall make available DS1 and DS3 Dedicated Transport Loops that were in service for TWTC Midwestern in a wire center on the Subsequent Wire Center List as of the thirtieth tenth (30th10th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty ninety (18090) days after the thirtieth tenth (30th10th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 2.1.4.12.4 Subsequent disconnects or loss of End Users shall be removed from the Subsequent Embedded Base. 2.1.4.12.5 The rates set forth in Exhibit B 2 of Attachment A of the Agreement plus 15% shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 2.1.4.12.6 No later than one hundred eighty forty (18040) days from AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List, TWTC Midwestern shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 In . The Parties shall negotiate a project schedule for the case Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this AgreementBase. 5.4.6.6 2.1.4.12.6.1 If TWTC Midwestern fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection 2.1.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 6.2.6.10.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 6.2.6.1 or 5.4.2.2 6.2.6.2 above, but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a CNL. Each such list of additional wire centers shall be considered a Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders. 5.4.6.2 TWTC shall have thirty 6.2.6.10.2 Effective ten (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (3010) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide DS1 and DS3 Dedicated Transport, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 of this Attachment1.5 above. 5.4.6.3 6.2.6.10.3 For purposes of Section 5.4.6.1 6.2.6.10 above, AT&T BellSouth shall make available DS1 and DS3 Dedicated Transport that were was in service for TWTC Level 3 in a wire center on the Subsequent Wire Center List as of the thirtieth tenth (30th10th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty ninety (18090) days after the thirtieth tenth (30th10th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 6.2.6.10.4 Subsequent disconnects or loss of End Users shall be removed from the Subsequent Embedded Base. 6.2.6.10.5 The rates set forth in Exhibit B A of Attachment 2 of the Agreement plus 15% shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 6.2.6.10.6 No later than one hundred eighty forty (18040) days from AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List, TWTC List Level 3 shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 In . The Parties shall negotiate a project schedule for the case Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this AgreementBase. 5.4.6.6 6.2.6.10.6.1 If TWTC Level 3 fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection 6.2.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 5.6.3.10.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 or 5.4.2.2 aboveSection 5.6.3.4.1, but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a CNL. Each such list of additional wire centers shall be considered a “Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders”. 5.4.6.2 TWTC shall have thirty 5.6.3.10.2 Effective fourteen (3014) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (30) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide DS1 and DS3 Dedicated unbundled access to Dark Fiber Transport, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 1.6 of this Attachment. 5.4.6.3 5.6.3.10.3 For purposes of Section 5.4.6.1 above5.6.3.10, AT&T BellSouth shall make available DS1 and DS3 Dedicated Dark Fiber Transport that were in service for TWTC TCG in a wire center on the Subsequent Wire Center List as of the thirtieth tenth (30th14th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty and twenty (180120) days after the thirtieth fourteenth (30th14th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 5.6.3.10.4 Subsequent disconnects or loss of End Users shall be removed from the Subsequent Embedded Base. 5.6.3.10.5 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 5.6.3.10.6 No later than one hundred eighty sixty (18060) days from AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List, TWTC List TCG shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 In . The Parties agree to work cooperatively to confirm that the case of disconnection, facilities on the applicable disconnect charges set forth spreadsheet are the facilities to be included in this Agreement TCG’s Subsequent Embedded Base. The Parties shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as negotiate a project schedule for the Conversion of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from Subsequent Embedded Base. BellSouth shall charge the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the non-recurring switch-as-is charge set forth in Exhibit A to this Attachment 2rate for these conversions. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this Agreement. 5.4.6.6 5.6.3.10.6.1 If TWTC TCG fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection 5.6.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 2.1.4.12.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 or 5.4.2.2 aboveSection 2.1.4.5, but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a carrier notification letter (CNL). Each such list of additional wire centers shall be considered a “Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders”. 5.4.6.2 TWTC shall have thirty 2.1.4.12.2 Effective ten (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (3010) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide unbundle DS1 and and/or DS3 Dedicated TransportLoops, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 1.8 of this Attachment. 5.4.6.3 2.1.4.12.3 For purposes of Section 5.4.6.1 above2.1.4.12, AT&T BellSouth shall make available DS1 and DS3 Dedicated Transport Loops that were in service for TWTC NationNET in a wire center on the Subsequent Wire Center List as of the thirtieth tenth (30th10th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty ninety (18090) days after the thirtieth tenth (30th10th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 2.1.4.12.4 Subsequent disconnects or loss of End Users shall be removed from the Subsequent Embedded Base. 2.1.4.12.5 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 2.1.4.12.6 No later than one hundred eighty forty (18040) days from AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List, TWTC NationNET shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 In . The Parties shall negotiate a project schedule for the case Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this AgreementBase. 5.4.6.6 2.1.4.12.6.1 If TWTC NationNET fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection 2.1.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 4.2.6.10.1 In the event AT&T identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 Section 4.2.6.1 or 5.4.2.2 above4.2.6.4, but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T shall include such additional wire centers in a CNL. Each such list of additional wire centers shall be considered a Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders. 5.4.6.2 TWTC shall have 4.2.6.10.2 Effective thirty (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (30) business calendar days after the date of a AT&T CNL providing a Subsequent Wire Center List, AT&T shall not be required to provide DS1 and DS3 Dedicated Transport, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 1.8 of this Attachment. 5.4.6.3 4.2.6.10.3 For purposes of Section 5.4.6.1 above4.2.6.10, AT&T shall make available de-listed DS1 and DS3 Dedicated Transport that were was in service for TWTC BHN in a wire center on the Subsequent Wire Center List as of the thirtieth (30th) business calendar day after the date of AT&T’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred and eighty (180) calendar days days after the thirtieth (30th) business calendar day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s 's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 4.2.6.10.4 Subsequent disconnects or loss of End Users shall be removed from the Subsequent Embedded Base. 4.2.6.10.5 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 4.2.6.10.6 No later than one hundred and eighty (180) calendar days from AT&T’s 's CNL identifying the Subsequent Wire Center List, TWTC List BHN shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T services. 5.4.6.5.1 In . The Parties shall negotiate a project schedule for the case Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this AgreementBase. 5.4.6.6 4.2.6.10.6.1 If TWTC BHN fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection 4.2.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 2.1.4.12.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 or 5.4.2.2 aboveSection 2.1.4.5, but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a carrier notification letter (CNL). Each such list of additional wire centers shall be considered a “Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders”. 5.4.6.2 TWTC shall have thirty 2.1.4.12.2 Effective ten (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (3010) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide unbundle DS1 and and/or DS3 Dedicated TransportLoops, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 1.8 of this Attachment. 5.4.6.3 2.1.4.12.3 For purposes of Section 5.4.6.1 above2.1.4.12, AT&T BellSouth shall make available DS1 and DS3 Dedicated Transport Loops that were in service for TWTC Clearwave Communications in a wire center on the Subsequent Wire Center List as of the thirtieth tenth (30th10th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty ninety (18090) days after the thirtieth tenth (30th10th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 2.1.4.12.4 Subsequent disconnects or loss of End Users shall be removed from the Subsequent Embedded Base. 2.1.4.12.5 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 2.1.4.12.6 No later than one hundred eighty forty (18040) days from AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List, TWTC Clearwave Communications shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 In . The Parties shall negotiate a project schedule for the case Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this AgreementBase. 5.4.6.6 2.1.4.12.6.1 If TWTC Clearwave Communications fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection 2.1.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 6.2.6.10.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 6.2.6.1 or 5.4.2.2 6.2.6.2 above, but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a CNL. Each such list of additional wire centers shall be considered a Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders. 5.4.6.2 TWTC shall have thirty 6.2.6.10.2 Effective ten (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (3010) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide DS1 and DS3 Dedicated Transport, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 of this Attachment1.5 above. 5.4.6.3 6.2.6.10.3 For purposes of Section 5.4.6.1 6.2.6.10 above, AT&T BellSouth shall make available DS1 and DS3 Dedicated Transport that were was in service for TWTC PBT in a wire center on the Subsequent Wire Center List as of the thirtieth tenth (30th10th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty ninety (18090) days after the thirtieth tenth (30th10th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 6.2.6.10.4 Subsequent disconnects or loss of End Users shall be removed from the Subsequent Embedded Base. 6.2.6.10.5 The rates set forth in Exhibit B of Attachment 2 of the Agreement plus 15% shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 6.2.6.10.6 No later than one hundred eighty forty (18040) days from AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List, TWTC List PBT shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 In . The Parties shall negotiate a project schedule for the case Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this AgreementBase. 5.4.6.6 6.2.6.10.6.1 If TWTC PBT fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection 6.2.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 5.9.1.10.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 or 5.4.2.2 aboveSection 5.9.1.4.1, but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a CNL. Each such list of additional wire centers shall be considered a “Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders”. 5.4.6.2 TWTC shall have thirty 5.9.1.10.2 Effective ten (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (3010) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide DS1 and DS3 Dedicated unbundled access to Dark Fiber Transport, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 1.8 of this Attachment. 5.4.6.3 5.9.1.10.3 For purposes of Section 5.4.6.1 above5.9.1.10, AT&T BellSouth shall make available DS1 and DS3 Dedicated Transport Loops that were in service for TWTC ConnectNow! in a wire center on the Subsequent Wire Center List as of the thirtieth tenth (30th10th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty ninety (18090) days after the thirtieth tenth (30th10th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 5.9.1.10.4 Subsequent disconnects or loss of End Users shall be removed from the Subsequent Embedded Base. 5.9.1.10.5 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 5.9.1.10.6 No later than one hundred eighty forty (18040) days from AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List, TWTC List ConnectNow! shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 In . The Parties shall negotiate a project schedule for the case Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this AgreementBase. 5.4.6.6 5.9.1.10.6.1 If TWTC ConnectNow! fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection 5.9.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 5.8.1.5.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 or 5.4.2.2 Section 5.8.1.2.1 above, but that were not included in the Master List of Unimpaired Wire Centers or AT&TBellSouth’s List of Unimpaired Wire Centers, AT&T BellSouth shall include such additional wire centers in a CNL. Each such list of additional wire centers shall be considered a “Subsequent Wire Center List”. AT&T BellSouth will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders. 5.4.6.2 TWTC 5.8.1.5.2 VarTec shall have thirty (30) business days to dispute the additional wire centers listed on AT&TBellSouth’s CNL. Absent such dispute, effective thirty (30) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide DS1 and DS3 Dedicated unbundled access to Dark Fiber Transport, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 1.8 of this Attachment. 5.4.6.3 5.8.1.5.3 For purposes of Section 5.4.6.1 5.8.1.5 above, AT&T BellSouth shall make available DS1 and DS3 Dedicated Dark Fiber Transport that were was in service for TWTC VarTec in a wire center on the Subsequent Wire Center List as of the thirtieth (30th30) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty (180) days after the thirtieth (30th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 5.8.1.5.4 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 5.8.1.5.5 No later than one hundred eighty (180) days from AT&TBellSouth’s CNL identifying the Subsequent Wire Center List, TWTC VarTec shall submit an LSR(s) or spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 5.8.1.5.6 In the case of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 5.8.1.5.6.1 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this Agreement. 5.4.6.6 If TWTC VarTec fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List, AT&T BellSouth will identify TWTCVarTec’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T BellSouth service(s), or in the case of Georgia, to the equivalent 271 service(s) service set forth in Exhibit 1. 2. 5.8.1.5.6.2 In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T BellSouth shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T BellSouth service as set forth in AT&TBellSouth’s tariffs. In the states of Alabama, Georgia, North Carolina Georgia and TennesseeSouth Carolina, those circuits identified and transitioned by AT&T BellSouth shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentAttachment 2. In the state of Louisiana, those circuits identified and transitioned by BellSouth shall be subject to the full nonrecurring charges for installation of the equivalent tariffed BellSouth service as set forth in BellSouth’s tariffs. 5.8.1.5.6.3 For Subsequent Embedded Base circuits converted pursuant to Section 5.8.1.5.5 above or transitioned pursuant to Section 5.8.1.5.6.1 above, the applicable recurring tariff charges shall apply as of the earlier of the date each circuit is converted or transitioned, as applicable, or the first day after the end of the Subsequent Transition Period.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 2.1.4.12.1 In the event AT&T identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 or 5.4.2.2 above, Section 2.1.4.3 above but that were not included in the Master List of Unimpaired Wire Centers or and AT&T’s List of Unimpaired Wire Centers, AT&T shall include such additional wire centers in a carrier notification letter (CNL). Each such list of additional wire centers shall be considered a “Subsequent Wire Center List”. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders. 5.4.6.2 TWTC 2.1.4.12.2 <<customer_short_name>> shall have thirty (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (30) business days after the date of a AT&T CNL providing a Subsequent Wire Center List, AT&T shall not be required to provide unbundle DS1 and and/or DS3 Dedicated TransportLoops, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 1.8 of this Attachment. 5.4.6.3 2.1.4.12.2.1 For purposes of Section 5.4.6.1 2.1.4.7 above, AT&T shall make available DS1 and DS3 Dedicated Transport Loops that were in service for TWTC <<customer_short_name>> in a wire center on the Subsequent Wire Center List as of the thirtieth (30th) business day after the date of AT&T’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty (180) days after the thirtieth (30th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 2.1.4.12.3 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 2.1.4.12.3.1 No later than one hundred eighty (180) days from AT&T’s CNL identifying the Subsequent Wire Center List, TWTC <<customer_short_name>> shall submit an LSR(s) or spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T services. 5.4.6.5.1 2.1.4.12.3.1.1 In the case of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 2.1.4.12.3.1.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this Agreement. 5.4.6.6 If TWTC <<customer_short_name>> fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC<<customer_short_name>>’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, and North Carolina and TennesseeCarolina, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentAttachment 2. In the State of Louisiana, those circuits identified and transitioned by AT&T shall be subject to the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. 2.1.4.12.3.1.3 For Subsequent Embedded Base circuits converted pursuant to Section 2.1.4.12.3.1 above or transitioned pursuant to Section 2.1.4. 12.3.1. 2 above, the applicable recurring tariff charges shall apply as of the earlier of the date each circuit is converted or transitioned, as applicable, or the first day after the end of the Subsequent Transition Period.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 6.2.7.10.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 Section 6.2.7.1 or 5.4.2.2 above6.2.7.2, but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a CNL. Each such list of additional wire centers shall be considered a Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders. 5.4.6.2 TWTC shall have 6.2.7.10.2 Effective thirty (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (30) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide DS1 and DS3 Dedicated Transport, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 1.8 of this Attachment. 5.4.6.3 6.2.7.10.3 For purposes of Section 5.4.6.1 above6.2.7.10, AT&T BellSouth shall make available DS1 and DS3 Dedicated Transport that were was in service for TWTC Sprint in a wire center on the Subsequent Wire Center List as of the thirtieth (30th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty and fifty (180150) days after the thirtieth (30th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 6.2.7.10.4 Subsequent disconnects or loss of End Users shall be removed from the Subsequent Embedded Base. 6.2.7.10.5 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 6.2.7.10.6 No later than one hundred eighty sixty (18060) days from AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List, TWTC Sprint shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 In . The Parties shall negotiate a project schedule for the case Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this AgreementBase. 5.4.6.6 6.2.7.10.6.1 If TWTC Sprint fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection 6.2.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 6.9.1.10.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 or 5.4.2.2 above, Section 6.9. 1.4.1 but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a CNL. Each such list of additional wire centers shall be considered a “Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders”. 5.4.6.2 TWTC shall have thirty 6.9.1.10.2 Effective ten (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (3010) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide DS1 and DS3 Dedicated unbundled access to Dark Fiber Transport, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 1.8 of this Attachment. 5.4.6.3 6.9.1.10.3 For purposes of Section 5.4.6.1 above6.9.1.10, AT&T BellSouth shall make available DS1 and DS3 Dedicated Transport Loops that were in service for TWTC GSC in a wire center on the Subsequent Wire Center List as of the thirtieth tenth (30th10th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty ninety (18090) days after the thirtieth tenth (30th10th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 6.9.1.10.4 Subsequent disconnects or loss of End Users shall be removed from the Subsequent Embedded Base. 6.9.1.10.5 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 6.9.1.10.6 No later than one hundred eighty forty (18040) days from AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List, TWTC List GSC shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 In . The Parties shall negotiate a project schedule for the case Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this AgreementBase. 5.4.6.6 6.9.1.10.6.1 If TWTC GSC fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection 6.9.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 6.2.12.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 or 5.4.2.2 aboveSection 6.2.4, but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a carrier notification letter (“CNL”). Each such list of additional wire centers shall be considered a “Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders”. 5.4.6.2 TWTC shall have thirty (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute6.2.12.2 For FLORIDA, GEORGIA, NORTH CAROLINA and TENNESSEE, effective thirty ten (3010) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center ListList that includes one (1) or more additional wire centers, AT&T BellSouth shall not be required to provide unbundle DS1 and and/or DS3 Dedicated Transport, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 1.8 of this Attachment. For ALABAMA, KENTUCKY, LOUISIANA, MISSISSIPPI and SOUTH CAROLINA, effective ten (10) business days after the date of a BellSouth CNL providing a Subsequent Wire Center List that includes one (1) or more additional wire centers, BellSouth shall not be required to unbundle DS1 and/or DS3 Dedicated Transport, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.8 of this Attachment. 5.4.6.3 6.2.12.3 For purposes of Section 5.4.6.1 above6.2.12, AT&T BellSouth shall make available DS1 and DS3 Dedicated Transport that were was in service for TWTC MCI in a wire center on the Subsequent Wire Center List as of the thirtieth tenth (30th10th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty ninety (18090) days after the thirtieth tenth (30th10th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 6.2.12.4 Subsequent disconnects or loss of customers shall be removed from the Subsequent Embedded Base. 6.2.12.5 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 6.2.12.6 No later than one hundred eighty forty (18040) days from AT&TBellSouth's CNL identifying the Subsequent Wire Center List MCI shall submit a spreadsheet(s) identifying the Subsequent Embedded Base of circuits to be Attachment 2 Network Elements & Other Services Page 39 disconnected or converted to other BellSouth services. The Parties shall negotiate a project schedule for the Conversion of the Subsequent Embedded Base. 6.2.12.6.1 If MCI fails to submit the spreadsheet(s) specified in Section 6.2.12.6 above for all of its Subsequent Embedded Base, within forty (40) days after the date of BellSouth’s CNL identifying the Subsequent Wire Center List, TWTC shall submit an LSR(s) or spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T services. 5.4.6.5.1 In the case of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this Agreement. 5.4.6.6 If TWTC fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T BellSouth will identify TWTC’s MCI's remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T BellSouth service(s), or in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those Those circuits identified and transitioned by AT&T BellSouth shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring non-recurring charges for installation of the equivalent tariffed AT&T BellSouth service as set forth in AT&T’s BellSouth's tariffs. In the states of Alabama. 6.2.12.6.2 For Subsequent Embedded Base circuits converted pursuant to Section 6.2.12.6 or transitioned pursuant to Section 6.2.12.6.1, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-recurring tariff charges shall apply as of the earlier of the date each circuit is rates set forth in Exhibit A converted or transitioned, as applicable, or the first day after the end of Attachmentthe Subsequent Transition Period

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 5.9.1.10.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 or 5.4.2.2 above, Section 5.9. 1.4.1 but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a CNL. Each such list of additional wire centers shall be considered a “Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders”. 5.4.6.2 TWTC shall have thirty 5.9.1.10.2 Effective ten (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (3010) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide DS1 and DS3 Dedicated unbundled access to Dark Fiber Transport, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 1.8 of this Attachment. 5.4.6.3 5.9.1.10.3 For purposes of Section 5.4.6.1 above5.9.1.10, AT&T BellSouth shall make available DS1 and DS3 Dedicated Transport Loops that were in service for TWTC CommuniGroup in a wire center on the Subsequent Wire Center List as of the thirtieth tenth (30th10th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty ninety (18090) days after the thirtieth tenth (30th10th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 5.9.1.10.4 Subsequent disconnects or loss of End Users shall be removed from the Subsequent Embedded Base. 5.9.1.10.5 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 5.9.1.10.6 No later than one hundred eighty forty (18040) days from AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List, TWTC List CommuniGroup shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 In . The Parties shall negotiate a project schedule for the case Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this AgreementBase. 5.4.6.6 5.9.1.10.6.1 If TWTC CommuniGroup fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection 5.9.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 6.8.1.10.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 or 5.4.2.2 Section 6.8. 1.4.1 above, but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a CNL. Each such list of additional wire centers shall be considered a “Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders”. 5.4.6.2 TWTC shall have thirty 6.8.1.10.2 Effective ten (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (3010) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide DS1 and DS3 Dedicated unbundled access to Dark Fiber Transport, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 of this Attachment1.5 above. 5.4.6.3 6.8.1.10.3 For purposes of Section 5.4.6.1 above6.8.1.10, AT&T BellSouth shall make available DS1 and DS3 Dedicated Dark Fiber Transport that were in service for TWTC US South in a wire center on the Subsequent Wire Center List as of the thirtieth tenth (30th10th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty ninety (18090) days after the thirtieth tenth (30th10th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 6.8.1.10.4 Subsequent disconnects or loss of End Users shall be removed from the Subsequent Embedded Base. 6.8.1.10.5 The rates set forth in Exhibit B of Attachment 2 of the Agreement plus 15% shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 6.8.1.10.6 No later than one hundred eighty forty (18040) days from AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List, TWTC List US South shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 In . The Parties shall negotiate a project schedule for the case Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this AgreementBase. 5.4.6.6 6.8.1.10.6.1 If TWTC US South fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection 6.8.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 2.1.4.12.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 or 5.4.2.2 Section 2.1.4.5 above, but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a carrier notification letter (CNL). Each such list of additional wire centers shall be considered a “Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders”. 5.4.6.2 TWTC shall have thirty 2.1.4.12.2 Effective ten (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (3010) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide unbundle DS1 and and/or DS3 Dedicated TransportLoops, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 1.5 of this Attachment. 5.4.6.3 2.1.4.12.3 For purposes of Section 5.4.6.1 2.1.4.12 above, AT&T BellSouth shall make available DS1 and DS3 Dedicated Transport Loops that were in service for TWTC Nexus in a wire center on the Subsequent Wire Center List as of the thirtieth tenth (30th10th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty ninety (18090) days after the thirtieth tenth (30th10th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 2.1.4.12.4 Subsequent disconnects or loss of End Users shall be removed from the Subsequent Embedded Base. 2.1.4.12.5 The rates set forth in Exhibit B A of Attachment 2 of the Agreement plus 15% shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 2.1.4.12.6 No later than one hundred eighty forty (18040) days from AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List, TWTC Nexus shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 In . The Parties shall negotiate a project schedule for the case Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this AgreementBase. 5.4.6.6 2.1.4.12.6.1 If TWTC Nexus fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection 2.1.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 2.1.4.12.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 or 5.4.2.2 aboveSection 2.1.4.5, but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a carrier notification letter (CNL). Each such list of additional wire centers shall be considered a “Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders”. 5.4.6.2 TWTC shall have thirty 2.1.4.12.2 Effective ten (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (3010) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide unbundle DS1 and and/or DS3 Dedicated TransportLoops, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 1.8 of this Attachment. 5.4.6.3 2.1.4.12.3 For purposes of Section 5.4.6.1 above2.1.4.12, AT&T BellSouth shall make available DS1 and DS3 Dedicated Transport Loops that were in service for TWTC EZ Communications in a wire center on the Subsequent Wire Center List as of the thirtieth tenth (30th10th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty ninety (18090) days after the thirtieth tenth (30th10th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 2.1.4.12.4 Subsequent disconnects or loss of End Users shall be removed from the Subsequent Embedded Base. 2.1.4.12.5 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 2.1.4.12.6 No later than one hundred eighty forty (18040) days from AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List, TWTC EZ Communications shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 In . The Parties shall negotiate a project schedule for the case Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this AgreementBase. 5.4.6.6 2.1.4.12.6.1 If TWTC EZ Communications fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 2.1.4.12.1 In the event AT&T identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 or 5.4.2.2 aboveSection 2.1.4.5, but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T shall include such additional wire centers in a carrier notification letter (CNL). Each such list of additional wire centers shall be considered a “Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders”. 5.4.6.2 TWTC shall have 2.1.4.12.2 Effective thirty (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (30) business calendar days after the date of a AT&T CNL providing a Subsequent Wire Center List, AT&T shall not be required to provide unbundle DS1 and and/or DS3 Dedicated TransportLoops, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 1.8 and 1.8.1 of this Attachment. 5.4.6.3 2.1.4.12.3 For purposes of Section 5.4.6.1 above2.1.4.12, AT&T shall make available delisted DS1 and DS3 Dedicated Transport Loops that were in service for TWTC BHN in a wire center on the Subsequent Wire Center List as of the thirtieth (30th30) business calendar day after the date of AT&T’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred and eighty (180) calendar days after the thirtieth (30th) business calendar day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s 's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 2.1.4.12.4 Subsequent disconnects or loss of End Users shall be removed from the Subsequent Embedded Base. 2.1.4.12.5 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 2.1.4.12.6 No later than one hundred and eighty (180) calendar days from AT&T’s 's CNL identifying the Subsequent Wire Center List, TWTC BHN shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T services. 5.4.6.5.1 In . The Parties shall negotiate a project schedule for the case Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this AgreementBase. 5.4.6.6 2.1.4.12.6.1 If TWTC BHN fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection 2.1.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 5.2.2.6.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 5.2.2.1 or 5.4.2.2 5.2.2.2 above, but that were not included in the Master List of Unimpaired Wire Centers or AT&TBellSouth’s List of Unimpaired Wire Centers, AT&T BellSouth shall include such additional wire centers in a CNL. Each such list of additional wire centers shall be considered a Subsequent Wire Center List. AT&T BellSouth will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders. 5.4.6.2 TWTC 5.2.2.6.2 VarTec shall have thirty (30) business days to dispute the additional wire centers listed on AT&TBellSouth’s CNL. Absent such dispute, effective thirty (30) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide DS1 and DS3 Dedicated Transport, as applicable, in such additional wire center(s), except pursuant to the self-self- certification process as set forth in Section 1.9.1 1.8 of this Attachment. 5.4.6.3 5.2.2.6.3 For purposes of Section 5.4.6.1 5.2.2.6 above, AT&T BellSouth shall make available DS1 and DS3 Dedicated Transport that were in service for TWTC VarTec in a wire center on the Subsequent Wire Center List as of the thirtieth (30th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty (180) days after the thirtieth (30th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 5.2.2.6.4 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 5.2.2.6.5 No later than one hundred eighty (180) days from AT&TBellSouth’s CNL identifying the Subsequent Wire Center List, TWTC VarTec shall submit an LSR(s) or spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 5.2.2.6.6 In the case of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 5.2.2.6.6.1 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this Agreement. 5.4.6.6 If TWTC VarTec fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List, AT&T BellSouth will identify TWTCVarTec’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T BellSouth service(s), or in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 12. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T BellSouth shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T BellSouth service as set forth in AT&TBellSouth’s tariffs. In the states of Alabama, Georgia, Georgia and North Carolina and TennesseeCarolina, those circuits identified and transitioned by AT&T BellSouth shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentAttachment 2. For the state of Louisiana, those circuits identified and transitioned by BellSouth shall be subject to the applicable switch-as-is rates set forth in BellSouth’s tariffs. 5.2.2.6.7 For Subsequent Embedded Base circuits converted pursuant to Section 5.2.2.6.5 above or transitioned pursuant to Section 5.2.2.6.6.1 above, the applicable recurring tariff charges shall apply as of the earlier of the date each circuit is converted or transitioned, as applicable, or the first day after the end of the Subsequent Transition Period.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 6.2.6.10.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 Section 6.2.6.1 or 5.4.2.2 above6.2.6.2, but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a CNL. Each such list of additional wire centers shall be considered a Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders. 5.4.6.2 TWTC shall have thirty 6.2.6.10.2 Effective ten (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (3010) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide DS1 and DS3 Dedicated Transport, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 1.8 of this Attachment. 5.4.6.3 6.2.6.10.3 For purposes of Section 5.4.6.1 above6.2.6.10, AT&T BellSouth shall make available DS1 and DS3 Dedicated Transport that were was in service for TWTC NGTelecom in a wire center on the Subsequent Wire Center List as of the thirtieth tenth (30th10th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty ninety (18090) days after the thirtieth tenth (30th10th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 6.2.6.10.4 Subsequent disconnects or loss of End Users shall be removed from the Subsequent Embedded Base. 6.2.6.10.5 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 6.2.6.10.6 No later than one hundred eighty forty (18040) days from AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List, TWTC List NGTelecom shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 In . The Parties shall negotiate a project schedule for the case Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this AgreementBase. 5.4.6.6 6.2.6.10.6.1 If TWTC NGTelecom fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection 6.2.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 2.1.4.6.1 In the event AT&T identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 or 5.4.2.2 above, Section 2.1.4.2 above but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T shall include such additional wire centers in a CNLan Accessible Letters (AL). Each such list of additional wire centers shall be considered a “Subsequent Wire Center List”. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders. 5.4.6.2 TWTC shall have thirty Effective ten (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (3010) business days after the date of a an AT&T CNL AL providing a Subsequent Wire Center List, AT&T shall not be required to provide unbundle DS1 and and/or DS3 Dedicated TransportLoops, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 of this Attachment. 5.4.6.3 2.1.4.6.2 For purposes of Section 5.4.6.1 2.1.4.6 above, AT&T shall make available DS1 and DS3 Dedicated Transport Loops that were in service for TWTC CLEC in a wire center on the Subsequent Wire Center List as of the thirtieth tenth (30th10th) business day after the date of AT&T’s CNL AL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty ninety (18090) days after the thirtieth tenth (30th10th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s CNL AL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 . Subsequent disconnects or loss of customers shall be removed from the Subsequent Embedded Base. The rates set forth in Exhibit B 5, Section 8.5.8, shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 . No later than one hundred eighty forty (18040) days from AT&T’s CNL AL identifying the Subsequent Wire Center List, TWTC CLEC shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T services. 5.4.6.5.1 In . The Parties shall negotiate a project schedule for the case Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base Base. Page 6626 of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this Agreement569082 ATTACHMENT 2 - NETWORK ELEMENTS AND OTHER SERVICES Page 12 OF 35 AT&T-13STATE/XXXX, INC. 5.4.6.6 2.1.4.6.3 If TWTC CLEC fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection 2.1.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 6.11.1.9.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 or 5.4.2.2 above, Section 6.11. 1.4.1 but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a CNL. Each such list of additional wire centers shall be considered a “Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders”. 5.4.6.2 TWTC shall have thirty 6.11.1.9.2 Effective ten (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (3010) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide DS1 and DS3 Dedicated unbundled access to Dark Fiber Transport, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 1.8 of this Attachment. 5.4.6.3 6.11.1.9.3 For purposes of Section 5.4.6.1 above6.11.1.10, AT&T BellSouth shall make available DS1 and DS3 Dedicated Transport Loops that were in service for TWTC MCI in a wire center on the Subsequent Wire Center List as of the thirtieth tenth (30th10th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty ninety (18090) days after the thirtieth tenth (30th10th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 6.11.1.9.4 Subsequent disconnects or loss of customers shall be removed from the Subsequent Embedded Base. 6.11.1.9.5 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 6.11.1.9.6 No later than one hundred eighty forty (18040) days from AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List, TWTC List CNL shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 In . The Parties shall negotiate a project schedule for the case Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this AgreementBase. 5.4.6.6 6.11.1.9.6.1 If TWTC MCI fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection 6.11.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 6.9.1.10.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 or 5.4.2.2 above, Section 6.9. 1.4.1 but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a CNL. Each such list of additional wire centers shall be considered a “Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders”. 5.4.6.2 TWTC shall have thirty 6.9.1.10.2 Effective ten (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (3010) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide DS1 and DS3 Dedicated unbundled access to Dark Fiber Transport, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 1.8 of this Attachment. 5.4.6.3 6.9.1.10.3 For purposes of Section 5.4.6.1 above6.9.1.10, AT&T BellSouth shall make available DS1 and DS3 Dedicated Dark Fiber Transport that were was in service for TWTC Cinergy in a wire center on the Subsequent Wire Center List as of the thirtieth tenth (30th10th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty ninety (18090) days after the thirtieth tenth (30th10th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 6.9.1.10.4 Subsequent disconnects or loss of End Users shall be removed from the Subsequent Embedded Base. 6.9.1.10.5 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 6.9.1.10.6 No later than one hundred eighty forty (18040) days from AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List, TWTC List Cinergy shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 In . The Parties shall negotiate a project schedule for the case Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this AgreementBase. 5.4.6.6 6.9.1.10.6.1 If TWTC Cinergy fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection 6.9.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 2.1.4.12.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 or 5.4.2.2 Section 2.1.4.5 above, but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a carrier notification letter (CNL). Each such list of additional wire centers shall be considered a “Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders”. 5.4.6.2 TWTC shall have thirty 2.1.4.12.2 Effective ten (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (3010) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide unbundle DS1 and and/or DS3 Dedicated TransportLoops, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 of this Attachment1.8 above. 5.4.6.3 2.1.4.12.3 For purposes of Section 5.4.6.1 2.1.4.12 above, AT&T BellSouth shall make available DS1 and DS3 Dedicated Transport Loops that were in service for TWTC Starlink in a wire center on the Subsequent Wire Center List as of the thirtieth tenth (30th10th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty ninety (18090) days after the thirtieth tenth (30th10th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 2.1.4.12.4 Subsequent disconnects or loss of End Users shall be removed from the Subsequent Embedded Base. 2.1.4.12.5 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 2.1.4.12.6 No later than one hundred eighty forty (18040) days from AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List, TWTC Starlink shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 In . The Parties shall negotiate a project schedule for the case Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this AgreementBase. 5.4.6.6 2.1.4.12.6.1 If TWTC Starlink fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection 2.1.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 6.9.1.10.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 or 5.4.2.2 above, Section 6.9. 1.4.1 but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a CNL. Each such list of additional wire centers shall be considered a “Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders”. 5.4.6.2 TWTC shall have thirty 6.9.1.10.2 Effective ten (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (3010) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide DS1 and DS3 Dedicated unbundled access to Dark Fiber Transport, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 1.8 of this Attachment. 5.4.6.3 6.9.1.10.3 For purposes of Section 5.4.6.1 above6.9.1.10, AT&T BellSouth shall make available DS1 and DS3 Dedicated Dark Fiber Transport that were was in service for TWTC Kinetix in a wire center on the Subsequent Wire Center List as of the thirtieth tenth (30th10th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty ninety (18090) days after the thirtieth tenth (30th10th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 6.9.1.10.4 Subsequent disconnects or loss of End Users shall be removed from the Subsequent Embedded Base. 6.9.1.10.5 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 6.9.1.10.6 No later than one hundred eighty forty (18040) days from AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List, TWTC List Kinetix shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 In . The Parties shall negotiate a project schedule for the case Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this AgreementBase. 5.4.6.6 6.9.1.10.6.1 If TWTC Kinetix fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection 6.9.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 2.1.4.12.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 or 5.4.2.2 aboveSection 2.1.4.5, but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a carrier notification letter (CNL). Each such list of additional wire centers shall be considered a “Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders”. 5.4.6.2 TWTC shall have thirty 2.1.4.12.2 Effective ten (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (3010) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide unbundle DS1 and and/or DS3 Dedicated TransportLoops, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 1.8 of this Attachment. 5.4.6.3 2.1.4.12.3 For purposes of Section 5.4.6.1 above2.1.4.12, AT&T BellSouth shall make available DS1 and DS3 Dedicated Transport Loops that were in service for TWTC NGTelecom in a wire center on the Subsequent Wire Center List as of the thirtieth tenth (30th10th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty ninety (18090) days after the thirtieth tenth (30th10th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 2.1.4.12.4 Subsequent disconnects or loss of End Users shall be removed from the Subsequent Embedded Base. 2.1.4.12.5 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 2.1.4.12.6 No later than one hundred eighty forty (18040) days from AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List, TWTC NGTelecom shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 In . The Parties shall negotiate a project schedule for the case Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this AgreementBase. 5.4.6.6 2.1.4.12.6.1 If TWTC NGTelecom fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection 2.1.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 5.9.1.5.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 or 5.4.2.2 Section 5.9.1.2.1 above, but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a CNL. Each such list of additional wire centers shall be considered a “Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders”. 5.4.6.2 TWTC shall have thirty 5.9.1.5.2 Effective ten (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (3010) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide DS1 and DS3 Dedicated unbundled access to Dark Fiber Transport, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 of this Attachment1.8 above. 5.4.6.3 5.9.1.5.3 For purposes of Section 5.4.6.1 above5.9.1.5, AT&T BellSouth shall make available DS1 and DS3 Dedicated Dark Fiber Transport that were was in service for TWTC NewPhone in a wire center on the Subsequent Wire Center List as of the thirtieth tenth (30th10th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty ninety (18090) days after the thirtieth tenth (30th10th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 5.9.1.5.4 Subsequent disconnects or loss of customers shall be removed from the Subsequent Embedded Base. 5.9.1.5.5 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 5.9.1.5.6 No later than one hundred eighty forty (18040) days from AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List, TWTC List NewPhone shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 In . The Parties shall negotiate a project schedule for the case Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this AgreementBase. 5.4.6.6 5.9.1.5.6.1 If TWTC NewPhone fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection 5.9.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 2.1.4.12.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 or 5.4.2.2 aboveSection 2.1.4.5, but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a carrier notification letter (CNL). Each such list of additional wire centers shall be considered a “Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders”. 5.4.6.2 TWTC shall have thirty 2.1.4.12.2 Effective ten (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (3010) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide unbundle DS1 and and/or DS3 Dedicated TransportLoops, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 1.8 of this Attachment. 5.4.6.3 2.1.4.12.3 For purposes of Section 5.4.6.1 above2.1.4.12, AT&T BellSouth shall make available DS1 and DS3 Dedicated Transport Loops that were in service for TWTC ConnectNow! in a wire center on the Subsequent Wire Center List as of the thirtieth tenth (30th10th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty ninety (18090) days after the thirtieth tenth (30th10th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 2.1.4.12.4 Subsequent disconnects or loss of End Users shall be removed from the Subsequent Embedded Base. 2.1.4.12.5 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 2.1.4.12.6 No later than one hundred eighty forty (18040) days from AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List, TWTC ConnectNow! shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 In . The Parties shall negotiate a project schedule for the case Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this AgreementBase. 5.4.6.6 2.1.4.12.6.1 If TWTC ConnectNow! fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection 2.1.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 5.8.1.5.1 In the event AT&T identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 or 5.4.2.2 Section 5.8.1.2.1 above, but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T shall include such additional wire centers in a CNLan AL. Each such list of additional wire centers shall be considered a “Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders”. 5.4.6.2 TWTC shall have thirty 5.8.1.5.2 Effective ten (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (3010) business days after the date of a an AT&T CNL AL providing a Subsequent Wire Center List, AT&T shall not be required to provide DS1 and DS3 Dedicated unbundled access to Dark Fiber Transport, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 of this Attachment. 5.4.6.3 5.8.1.5.3 For purposes of Section 5.4.6.1 above5.8.1.5, AT&T shall make available DS1 and DS3 Dedicated Dark Fiber Transport that were was in service for TWTC CLEC in a wire center on the Subsequent Wire Center List as of the thirtieth tenth (30th10th) business day after the date of AT&T’s CNL AL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty ninety (18090) days after the thirtieth tenth (30th10th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s CNL AL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 5.8.1.5.4 Subsequent disconnects or loss of customers shall be removed from the Subsequent Embedded Base. 5.8.1.5.5 The rates set forth in Exhibit B 5, Section 8.5.8, shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 5.8.1.5.6 No later than one hundred eighty forty (18040) days from AT&T’s CNL AL identifying the Subsequent Wire Center List, TWTC List CLEC shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T services. 5.4.6.5.1 In . The Parties shall negotiate a project schedule for the case Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this AgreementBase. 5.4.6.6 5.8.1.5.6.1 If TWTC CLEC fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection 5.8.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 5.8.11.1 In the event AT&T identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 or 5.4.2.2 Section 5.8.10.2.1 above, but that were not included in the Master List of Unimpaired Wire Centers or AT&T’s List of Unimpaired Wire Centers, AT&T shall include such additional wire centers in a CNL. Each such list of additional wire centers shall be considered a “Subsequent Wire Center List”. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders. 5.4.6.2 5.8.11.2 TWTC shall have thirty (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective eEffective thirty (30) business days after the date of a AT&T CNL providing a Subsequent Wire Center List, AT&T shall not be required to provide DS1 and DS3 Dedicated unbundled access to Dark Fiber Transport, as applicable, in such additional wire center(s), except pursuant to the self-self- certification process as set forth in Section 1.9.1 of this Attachment. 5.4.6.3 5.8.11.3 For purposes of Section 5.4.6.1 5.8.11.1 above, AT&T shall make available DS1 and DS3 Dedicated Dark Fiber Transport that were was in service for TWTC in a wire center on the Subsequent Wire Center List as of the thirtieth (30th30) business day after the date of AT&T’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty (180) days after the thirtieth (30th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 5.8.11.4 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 5.8.11.5 No later than one hundred eighty (180) days from AT&T’s CNL identifying the Subsequent Wire Center List, TWTC shall submit an LSR(s) or spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T services.. Version: 4Q06 Standard ICA 11/30/06 5.4.6.5.1 8.11.5.1 In the case of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this Agreement. 5.4.6.6 If TWTC fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of Attachment

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 6.2.6.10.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 Section 6.2.6.1 or 5.4.2.2 above6.2.6.2, but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a CNL. Each such list of additional wire centers shall be considered a Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders. 5.4.6.2 TWTC shall have thirty 6.2.6.10.2 Effective ten (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (3010) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide DS1 and DS3 Dedicated Transport, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 1.8 of this Attachment. 5.4.6.3 6.2.6.10.3 For purposes of Section 5.4.6.1 above6.2.6.10, AT&T BellSouth shall make available DS1 and DS3 Dedicated Transport that were was in service for TWTC Quality Telephone in a wire center on the Subsequent Wire Center List as of the thirtieth tenth (30th10th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty ninety (18090) days after the thirtieth tenth (30th10th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 6.2.6.10.4 Subsequent disconnects or loss of End Users shall be removed from the Subsequent Embedded Base. 6.2.6.10.5 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 6.2.6.10.6 No later than one hundred eighty forty (18040) days from AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List, TWTC List Quality Telephone shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 In . The Parties shall negotiate a project schedule for the case Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this AgreementBase. 5.4.6.6 6.2.6.10.6.1 If TWTC Quality Telephone fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 2.1.4.12.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 or 5.4.2.2 aboveSection 2.1.4.5, but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a carrier notification letter (CNL). Each such list of additional wire centers shall be considered a “Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders”. 5.4.6.2 TWTC shall have thirty 2.1.4.12.2 Effective ten (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (3010) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide unbundle DS1 and and/or DS3 Dedicated TransportLoops, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 1.8 of this Attachment. 5.4.6.3 2.1.4.12.3 For purposes of Section 5.4.6.1 above2.1.4.12, AT&T BellSouth shall make available DS1 and DS3 Dedicated Transport Loops that were in service for TWTC Your Communication Connection Group in a wire center on the Subsequent Wire Center List as of the thirtieth tenth (30th10th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty ninety (18090) days after the thirtieth tenth (30th10th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 2.1.4.12.4 Subsequent disconnects or loss of End Users shall be removed from the Subsequent Embedded Base. 2.1.4.12.5 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 2.1.4.12.6 No later than one hundred eighty forty (18040) days from AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List, TWTC Your Communication Connection Group shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 In . The Parties shall negotiate a project schedule for the case Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this AgreementBase. 5.4.6.6 2.1.4.12.6.1 If TWTC Your Communication Connection Group fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection 2.1.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 6.9.1.10.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 or 5.4.2.2 above, Section 6.9. 1.4.1 but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a CNL. Each such list of additional wire centers shall be considered a “Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders”. 5.4.6.2 TWTC shall have thirty 6.9.1.10.2 Effective ten (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (3010) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide DS1 and DS3 Dedicated unbundled access to Dark Fiber Transport, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 1.8 of this Attachment. 5.4.6.3 6.9.1.10.3 For purposes of Section 5.4.6.1 above6.9.1.10, AT&T BellSouth shall make available DS1 and DS3 Dedicated Transport Loops that were in service for TWTC Clearwave Communications in a wire center on the Subsequent Wire Center List as of the thirtieth tenth (30th10th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty ninety (18090) days after the thirtieth tenth (30th10th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 6.9.1.10.4 Subsequent disconnects or loss of End Users shall be removed from the Subsequent Embedded Base. 6.9.1.10.5 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 6.9.1.10.6 No later than one hundred eighty forty (18040) days from AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List, TWTC List Clearwave Communications shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 In . The Parties shall negotiate a project schedule for the case Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this AgreementBase. 5.4.6.6 6.9.1.10.6.1 If TWTC Clearwave Communications fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection 6.9.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 5.2.2.6.1 In the event AT&T identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 5.2.2.1 or 5.4.2.2 5.2.2.2 above, but that were not included in the Master List of Unimpaired Wire Centers or AT&T’s List of Unimpaired Wire Centers, AT&T shall include such additional wire centers in a CNL. Each such list of additional wire centers shall be considered a Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders. 5.4.6.2 TWTC 5.2.2.6.2 BLC Management shall have thirty (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (30) business days after the date of a an AT&T CNL providing a Subsequent Wire Center List, AT&T shall not be required to provide DS1 and DS3 Dedicated Transport, as applicable, in such additional wire center(s), except pursuant to the self-self- certification process as set forth in Section 1.9.1 1.8 of this Attachment. 5.4.6.3 5.2.2.6.3 For purposes of Section 5.4.6.1 5.2.2.6 above, AT&T shall make available DS1 and DS3 Dedicated Transport that were in service for TWTC BLC Management in a wire center on the Subsequent Wire Center List as of the thirtieth (30th) business day after the date of AT&T’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty (180) days after the thirtieth (30th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 5.2.2.6.4 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 5.2.2.6.5 No later than one hundred eighty (180) days from AT&T’s CNL identifying the Subsequent Wire Center List, TWTC BLC Management shall submit an LSR(s) or spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T services. 5.4.6.5.1 5.2.2.6.6 In the case of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 5.2.2.6.6.1 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this Agreement. 5.4.6.6 If TWTC BLC Management fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTCBLC Management’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, Georgia and North Carolina and TennesseeCarolina, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentAttachment 2. For the state of Louisiana, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in AT&T’s tariffs. 5.2.2.6.7 For Subsequent Embedded Base circuits converted pursuant to Section 5.2.2.6.5 above or transitioned pursuant to Section 5.2.2.6.6.1 above, the applicable recurring tariff charges shall apply as of the earlier of the date each circuit is converted or transitioned, as applicable, or the first day after the end of the Subsequent Transition Period.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 5.8.1.10.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 or 5.4.2.2 Section 5.8.1.4.1 above, but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a CNL. Each such list of additional wire centers shall be considered a “Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders”. 5.4.6.2 TWTC shall have thirty 5.8.1.10.2 Effective ten (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (3010) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide DS1 and DS3 Dedicated unbundled access to Dark Fiber Transport, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 of this Attachment1.5 above. 5.4.6.3 5.8.1.10.3 For purposes of Section 5.4.6.1 above5.8.1.10, AT&T BellSouth shall make available DS1 and DS3 Dedicated Dark Fiber Transport that were in service for TWTC Midwestern in a wire center on the Subsequent Wire Center List as of the thirtieth tenth (30th10th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty ninety (18090) days after the thirtieth tenth (30th10th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 5.8.1.10.4 Subsequent disconnects or loss of End Users shall be removed from the Subsequent Embedded Base. 5.8.1.10.5 The rates set forth in Exhibit B A of Attachment 2 of the Agreement plus 15% shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 5.8.1.10.6 No later than one hundred eighty forty (18040) days from AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List, TWTC List Midwestern shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 In . The Parties shall negotiate a project schedule for the case Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this AgreementBase. 5.4.6.6 5.8.1.10.6.1 If TWTC Midwestern fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection 5.8.

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 2.1.4.12.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 or 5.4.2.2 aboveSection 2.1.4.5, but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a carrier notification letter (CNL). Each such list of additional wire centers shall be considered a “Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders”. 5.4.6.2 TWTC shall have thirty 2.1.4.12.2 Effective ten (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (3010) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide unbundle DS1 and and/or DS3 Dedicated TransportLoops, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 1.8 of this Attachment. 5.4.6.3 2.1.4.12.3 For purposes of Section 5.4.6.1 above2.1.4.12, AT&T BellSouth shall make available DS1 and DS3 Dedicated Transport Loops that were in service for TWTC Quality Telephone in a wire center on the Subsequent Wire Center List as of the thirtieth tenth (30th10th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty ninety (18090) days after the thirtieth tenth (30th10th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 2.1.4.12.4 Subsequent disconnects or loss of End Users shall be removed from the Subsequent Embedded Base. 2.1.4.12.5 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 2.1.4.12.6 No later than one hundred eighty forty (18040) days from AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List, TWTC Quality Telephone shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 In . The Parties shall negotiate a project schedule for the case Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this AgreementBase. 5.4.6.6 2.1.4.12.6.1 If TWTC Quality Telephone fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection

Modifications and Updates to the Wire Center List and Subsequent Transition Periods. 5.4.6.1 2.1.4.12.1 In the event AT&T BellSouth identifies additional wire centers that meet the criteria set forth in Sections 5.4.2.1 or 5.4.2.2 aboveSection 2.1.4.5, but that were not included in the Master List of Unimpaired Initial Wire Centers or AT&T’s List of Unimpaired Wire CentersCenter List, AT&T BellSouth shall include such additional wire centers in a carrier notification letter (CNL). Each such list of additional wire centers shall be considered a “Subsequent Wire Center List. AT&T will follow any limitations on the frequency with which it may issue such lists and notification procedures set forth in applicable Commission orders”. 5.4.6.2 TWTC shall have thirty 2.1.4.12.2 Effective ten (30) business days to dispute the additional wire centers listed on AT&T’s CNL. Absent such dispute, effective thirty (3010) business days after the date of a AT&T BellSouth CNL providing a Subsequent Wire Center List, AT&T BellSouth shall not be required to provide unbundle DS1 and and/or DS3 Dedicated TransportLoops, as applicable, in such additional wire center(s), except pursuant to the self-certification process as set forth in Section 1.9.1 1.8 of this Attachment. 5.4.6.3 2.1.4.12.3 For purposes of Section 5.4.6.1 above2.1.4.12, AT&T BellSouth shall make available DS1 and DS3 Dedicated Transport Loops that were in service for TWTC Home Telecom in a wire center on the Subsequent Wire Center List as of the thirtieth tenth (30th10th) business day after the date of AT&TBellSouth’s CNL identifying the Subsequent Wire Center List (Subsequent Embedded Base) until one hundred eighty ninety (18090) days after the thirtieth tenth (30th10th) business day Version: 4Q06 Standard ICA 11/30/06 from the date of AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List (Subsequent Transition Period). 5.4.6.4 2.1.4.12.4 Subsequent disconnects or loss of End Users shall be removed from the Subsequent Embedded Base. 2.1.4.12.5 The rates set forth in Exhibit B shall apply to the Subsequent Embedded Base during the Subsequent Transition Period. 5.4.6.5 2.1.4.12.6 No later than one hundred eighty forty (18040) days from AT&T’s BellSouth's CNL identifying the Subsequent Wire Center List, TWTC Home Telecom shall submit an LSR(s) or a spreadsheet(s) as applicable, identifying the Subsequent Embedded Base of circuits to be disconnected or converted to other AT&T BellSouth services. 5.4.6.5.1 In . The Parties shall negotiate a project schedule for the case Conversion of disconnection, the applicable disconnect charges set forth in this Agreement shall apply. 5.4.6.5.2 If TWTC chooses to convert DS1 and/or DS3 Dedicated Transport to special access circuits in existence as of the Effective Date of this Agreement, AT&T will include such DS1 and/or DS3 Dedicated Transport within TWTC’s total special access circuits, and apply any discounts to which TWTC is entitled from the transition period of 3/11/2006 to the conversion date. Conversions will be subject to the switch-as-is charge set forth in Exhibit A to this Attachment 2. 5.4.6.5.3 AT&T shall not impose disconnect or nonrecurring installation charges when transitioning the Subsequent Embedded Base of DS1 and DS3 Dedicated Transport in existence as of the Effective Date of this AgreementBase. 5.4.6.6 2.1.4.12.6.1 If TWTC Home Telecom fails to submit the LSR(s) or spreadsheet(s) for all of its Subsequent Embedded Base by one hundred eighty (180) days after the date of AT&T’s CNL identifying the Subsequent Wire Center List, AT&T will identify TWTC’s remaining Subsequent Embedded Base, if any, and will transition such circuits to the equivalent tariffed AT&T service(s), or specified in the case of Georgia, to the equivalent 271 service(s) set forth in Exhibit 1. In the states of Florida, Kentucky, Mississippi and South Carolina, those circuits identified and transitioned by AT&T shall be subject to the applicable disconnect charges as set forth in this Agreement and the full nonrecurring charges for installation of the equivalent tariffed AT&T service as set forth in AT&T’s tariffs. In the states of Alabama, Georgia, North Carolina and Tennessee, those circuits identified and transitioned by AT&T shall be subject to the applicable switch-as-is rates set forth in Exhibit A of AttachmentSection 2.1.