Common use of Signaling Clause in Contracts

Signaling. Signaling Interconnection may be used for signaling between Requesting Carrier switches, between Requesting Carrier switches and Ameritech switches, and between Requesting Carrier switches and those third party networks with which Ameritech’s SS7 network is interconnected. 4.5.1 Where available, Common Channel Interoffice Signaling (CCIS) signaling shall be used by the Parties to set up calls between the Parties' Telephone Exchange Service networks. Each Party shall supply Calling Party Number (CPN) within the SS7 signaling message, if available. If CCIS is unavailable, MF (Multi-Frequency) signaling shall be used by the Parties. Each Party shall charge the other Party equal and reciprocal rates for CCIS signaling at the rates set forth at Item V of the Pricing Schedule. 4.5.2 Each Party is responsible for requesting Interconnection to the other Party’s CCIS network, where SS7 signaling on the trunk group(s) is desired. Each Party shall connect to a pair of access STPs that serve each LATA where traffic will be exchanged or shall arrange for signaling connectivity through a third party provider which is connected to the other Party’s signaling network. The Parties shall establish Interconnection at the STP. 4.5.3 The Parties will cooperate on the exchange of Transactional Capabilities Application Part (TCAP) messages to facilitate interoperability of CCIS-based features between their respective networks, including all CLASS features and functions, to the extent each Party offers such features and functions to its Customers. All CCIS signaling parameters will be provided including Calling Party Number (CPN), Originating Line Information (OLI), calling party category and charge number. For terminating exchange access, such information shall be passed by a Party to the extent that such information is provided to such Party. 4.5.4 Where available and upon the request of the other Party, each Party shall cooperate to ensure that its trunk groups are configured utilizing the B8ZS ESF protocol for 64 kbps clear channel transmission to allow for ISDN interoperability between the Parties’ respective networks.

Signaling. Signaling Interconnection may be used for signaling between Requesting Carrier CLEC switches, between Requesting Carrier CLEC switches and Ameritech switches, and between Requesting Carrier CLEC switches and those third party networks with which Ameritech’s Ameritechs SS7 network is interconnected. 4.5.1 IV.4.1 Where available, Common Channel Interoffice Signaling (CCIS) signaling shall be used by the Parties to set up calls between the Parties' Telephone Exchange Service networks. Each Party shall supply Calling Party Number (CPN) within the SS7 signaling message, if available. If CCIS is unavailable, MF (Multi-Frequency) signaling shall be used by the Parties. Each Party shall charge the other Party equal and reciprocal rates for CCIS signaling at the rates set forth at Item V of the Pricing Schedule. 4.5.2 IV.4.2 Each Party is responsible for requesting Interconnection to the other Party’s Partys CCIS network, where SS7 signaling on the trunk group(s) is desired. Each Party shall connect to a pair of access STPs that serve each LATA where traffic will be exchanged or shall arrange for signaling connectivity through a third party provider which is connected to the other Party’s Partys signaling network. The Parties shall establish Interconnection at the STP. 4.5.3 IV.4.3 The Parties will cooperate on the exchange of Transactional Capabilities Application Part (TCAP) messages to facilitate interoperability of CCIS-based features between their respective networks, including all CLASS features and functions, to the extent each Party offers such features and functions to its Customers. All CCIS signaling parameters will be provided including Calling Party Number (CPN), Originating Line Information (OLI), calling party category and charge number. For terminating exchange access, such information shall be passed by a Party to the extent that such information is provided to such Party. 4.5.4 IV.4.4 Where available and upon the request of the other Party, each Party shall cooperate to ensure that its trunk groups are configured utilizing the B8ZS ESF protocol for 64 kbps clear channel transmission to allow for ISDN interoperability between the Parties’ Parties respective networks.

Signaling. Signaling Interconnection may be used for signaling between Requesting Carrier switches, between Requesting Carrier switches and Ameritech switches, and between Requesting Carrier switches and those third party networks with which Ameritech’s SS7 network is interconnected. 4.5.1 4.4.1 Where available, Common Channel Interoffice Signaling (CCIS) signaling shall be used by the Parties to set up calls between the Parties' ’ Telephone Exchange Service networks. Each Party shall supply Calling Party Number (CPN) (NPA/NXX assigned to its local exchange switch) within the SS7 signaling message, if available. If CCIS is unavailable, MF (Multi-FrequencyFrequency (MF) signaling shall be used by the Parties. Each Party shall charge the other Party equal and reciprocal rates for CCIS signaling at the rates set forth at Item V of the Pricing Schedule. 4.5.2 4.4.2 Each Party party is responsible for requesting Interconnection to the other Party’s CCIS network, where SS7 signaling on the trunk group(s) is desired. Each Party shall connect to a pair of access STPs that serve each LATA where traffic will be exchanged using a direct connection to the STPs serving the desired LATA, through the designated Ameritech state gateway STP or shall arrange for signaling connectivity through a third party provider which is connected to the other Partyparty’s signaling network. The Parties shall establish Interconnection at the STP. The rate for signaling links to establish such Interconnection is as provided in Ameritech’s UNE Rate Elements. If Requesting Carrier does not possess STPs, Requesting Carrier may purchase access to Ameritech’s SS7 Network as provided in Ameritech’s UNE Rate Elements. 4.5.3 4.4.3 The Parties will cooperate on the testing and exchange of Transactional Capabilities Application Part (TCAP) messages to facilitate interoperability of CCIS-based features between their respective networks, including all CLASS features and functions, to the extent each Party offers such features and functions to its Customers. All CCIS signaling parameters will be provided provided, including Calling Party Number (CPN), Originating Line Information (OLI), calling party category and charge number. For terminating exchange accessExchange Access and Transit Service traffic, such information shall be passed by a Party to the extent that such information is provided to such Party. 4.5.4 4.4.4 Where available and upon the request of the other Party, each Party shall cooperate to ensure that its trunk groups are configured utilizing the B8ZS ESF protocol for 64 kbps Kbps clear channel transmission to allow for ISDN interoperability between the Parties’ respective networks.

Signaling. Signaling Interconnection may be used for signaling between Requesting Carrier switches, between Requesting Carrier switches and Ameritech switches, and between Requesting Carrier switches and those third party networks interconnected with which Ameritech’s SS7 network is interconnectednetwork. 4.5.1 4.4.1 Where available, Common Channel Interoffice Signaling (CCIS) signaling shall be used by the Parties to set up calls between the Parties' Telephone Exchange Service networks. Each Party shall supply Calling Party Number (CPN) within the SS7 signaling message, if available. If CCIS is unavailable, MF (Multi-FrequencyFrequency (MF) signaling shall be used by the Parties. Each Party shall charge the other Party equal and reciprocal rates for CCIS signaling at the rates set forth at Item V of the Pricing Schedule. 4.5.2 4.4.2 Each Party is responsible for requesting Interconnection to the other Party’s CCIS network, where SS7 signaling on the trunk group(s) is desired. Each Party shall connect to a pair of access STPs that serve each LATA where traffic will be exchanged or shall arrange for signaling connectivity through a third party provider which is connected to the other Party’s signaling network. The Parties shall establish Interconnection at the STP. 4.5.3 4.4.3 The Parties will cooperate on the exchange of Transactional Capabilities Application Part (TCAP) messages to facilitate interoperability of CCIS-based features between their respective networks, including all CLASS features and functions, to the extent each Party offers such features and functions to its Customers. All CCIS signaling parameters will be provided including Calling Party Number (CPN), Originating Line Information (OLI), calling party category and charge number. For terminating exchange accessExchange Access traffic, such information shall be passed by a Party to the extent that such information is provided to such Party. 4.5.4 4.4.4 Where available and upon the request of the other Party, each Party shall cooperate to ensure that its trunk groups are configured utilizing the B8ZS ESF protocol for 64 kbps clear channel transmission to allow for ISDN interoperability between the Parties’ Parties respective networks.

Signaling. Signaling Interconnection may be used for signaling between Requesting Carrier Focal switches, between Requesting Carrier Focal switches and Ameritech switches, and between Requesting Carrier Focal switches and those third party networks with which Ameritech’s 's SS7 network is interconnected. 4.5.1 4.4.1 Where available, Common Channel Interoffice Signaling (CCIS) signaling shall be used by the Parties to set up calls between the Parties' Telephone Exchange Service networks. Each Party shall supply Calling Party Number (CPN) within the SS7 signaling message, if available. If CCIS is unavailable, MF (Multi-FrequencyFrequency (MF) signaling shall be used by the Parties. Each Party shall charge the other Party equal and reciprocal rates for CCIS signaling at the rates set forth at Item V of the Pricing Schedule. 4.5.2 4.4.2 Each Party is responsible for requesting Interconnection to the other Party’s 's CCIS network, where SS7 signaling on the trunk group(s) is desired. Each Party shall connect to a pair of access STPs that serve each LATA where traffic will be exchanged or shall arrange for signaling connectivity through a third party provider which is connected to the other Party’s 's signaling network. The Parties shall establish Interconnection at the STP. 4.5.3 4.4.3 The Parties will cooperate on the exchange of Transactional Capabilities Application Part (TCAP) messages to facilitate interoperability of CCIS-based features between their respective networks, including all CLASS features and functions, to the extent each Party offers such features and functions to its Customers. All CCIS signaling parameters will be provided provided, including Calling Party Number (CPN), Originating Line Information (OLI), calling party category and charge number. For terminating exchange accessExchange Access traffic, such information shall be passed by a Party to the extent that such information is provided to such Party. 4.5.4 4.4.4 Where available and upon the request of the other Party, each Party shall cooperate to ensure that its trunk groups are configured utilizing the B8ZS ESF protocol for 64 kbps Kbps clear channel transmission to allow for ISDN interoperability between the Parties’ ' respective networks.

Signaling. Signaling Interconnection may be used for signaling between Requesting Carrier switches, between Requesting Carrier switches and Ameritech switches, and between Requesting Carrier switches and those third party networks with which Ameritech’s SS7 network is interconnected. 4.5.1 4.4.1 Where available, Common Channel Interoffice Signaling (“CCIS”) signaling shall be used by the Parties to set up calls between the Parties' Telephone Exchange Service networks. Each Party shall supply Calling Party Number (“CPN”) within the SS7 signaling message, if available. If CCIS is unavailable, MF (“Multi-Frequency”) signaling shall be used by the Parties. Each Party shall charge is responsible for providing its portion of the other Party equal signaling links and reciprocal rates for ports on its STPs necessary to provide CCIS signaling at to support the rates set forth at Item V exchange of the Pricing Scheduletraffic under this Agreement. 4.5.2 4.4.2 Each Party is responsible for requesting Interconnection to the other Party’s CCIS network, network where SS7 signaling on the trunk group(s) is desired. Each Party The Parties will interconnect their networks using SS7 signaling as defined in GR-317 and GR-394, including ISDN User Part (“ISUP) for trunk signaling and Transaction Capabilities Application Part (“TCAP”) for CLASS-based features in the interconnect of their networks. Sprint shall connect provide A-Link connection to a pair CBT’s STPs for the purpose of access STPs that serve each LATA where traffic will be exchanged or shall arrange for SS7 signaling connectivity through a third party provider which is connected to the other Party’s signaling networkbetween Sprint and CBT. The Parties shall establish Interconnection at work cooperatively to test and implement the STPprimary and alternate SS7 interconnection described in Schedule 4.4. 4.5.3 4.4.3 The Parties will cooperate on the exchange of Transactional Capabilities Application Part (“TCAP”) messages to facilitate interoperability of CCIS-based features between their respective networks, including all CLASS features and functions, to the extent each Party offers such features and functions to its Customers. All CCIS signaling parameters where applicable will be provided provided, including Calling Party Number (“CPN”), Originating Line Information (“OLI”), calling party category and charge number. For terminating exchange accessExchange Access, such information shall be passed by a Party to the extent that such information is provided to such Party. 4.5.4 4.4.4 Where available available, and upon the request of the other Party, each Party shall cooperate to ensure that its trunk groups are configured utilizing the B8ZS ESF protocol for 64 kbps 64- Kbps clear channel transmission to allow for ISDN interoperability between the Parties’ ' respective networks.

Signaling. Signaling Interconnection may be used for signaling between Requesting Carrier switches, between Requesting Carrier switches and Ameritech switches, and between Requesting Carrier switches and those third party networks with which Ameritech’s SS7 network is interconnected. 4.5.1 IV.4.1 Where available, Common Channel Interoffice Signaling (CCIS) signaling shall be used by the Parties to set up calls between the Parties' ’ Telephone Exchange Service networks. Each Party shall supply Calling Party Number (CPN) (NPA/NXX assigned to its local exchange switch) within the SS7 signaling message, if available. If CCIS is unavailable, MF (Multi-FrequencyFrequency (MF) signaling shall be used by the Parties. Each Party shall charge the other Party equal and reciprocal rates for CCIS signaling at the rates set forth at Item V of the Pricing Schedule. 4.5.2 IV.4.2 Each Party is responsible for requesting Interconnection to the other Party’s CCIS network, where SS7 signaling on the trunk group(s) is desired. Each Party shall connect to a pair of access STPs that serve each LATA where traffic will be exchanged using a direct connection to the STPs serving the desired LATA, through the designated Ameritech state gateway STP or shall arrange for signaling connectivity through a third party provider which is connected to the other Party’s signaling network. The Parties shall establish Interconnection at the STP. The rate for signaling links to establish such Interconnection is as provided in Ameritech’s access tariff(s). If the Requesting Carrier does not possess STPs, Requesting Carrier may purchase access to Ameritech’s SS7 Network as provided in Ameritech’s access tariff(s). 4.5.3 IV.4.3 [Reserved] IV.4.4 The Parties will cooperate on the exchange of Transactional Capabilities Application Part (TCAP) messages to facilitate interoperability of CCIS-based features between their respective networks, including all CLASS features and functions, to the extent each Party offers such features and functions to its Customers. All CCIS signaling parameters will be provided provided, including Calling Party Number (CPN), Originating Line Information (OLI), calling party category and charge number. For terminating exchange accessExchange Access and Transit Service traffic, such information shall be passed by a Party to the extent that such information is provided to such Party. 4.5.4 IV.4.5 Where available and upon the request of the other Party, each Party shall cooperate to ensure that its trunk groups are configured utilizing the B8ZS ESF protocol for 64 kbps Kbps clear channel transmission to allow for ISDN interoperability between the Parties’ respective networks.

Signaling. Signaling Interconnection may be used for signaling between Requesting Carrier switches, between Requesting Carrier switches and Ameritech switches, and between Requesting Carrier switches and those third party networks with which Ameritech’s SS7 network is interconnected. 4.5.1 4.4.1 Where available, Common Channel Interoffice Signaling (CCIS) signaling shall be used by the Parties to set up calls between the Parties' Telephone Exchange Service networks. Each Party shall supply Calling Party Number (CPN) (NPA/NXX assigned to its local exchange switch) within the SS7 signaling message, if available. If CCIS is unavailable, MF MultiFrequency (Multi-FrequencyMF) signaling shall be used by the Parties. Each Party shall charge the other Party equal and reciprocal rates for CCIS signaling at the rates set forth at Item V of the Pricing Schedule. 4.5.2 4.4.2 Each Party is responsible for requesting Interconnection to the other Party’s 's CCIS network, where SS7 signaling on the trunk group(s) is desired. Each Party shall connect to a pair of access STPs that serve each LATA where traffic will be exchanged using a direct connection to the STPs serving the desired LATA, through the designated Ameritech state gateway STP or shall arrange for signaling connectivity through a third party provider which is connected to the other Party’s 's signaling network. The Parties shall establish Interconnection at the STP. The rate for signaling links to establish such Interconnection is as provided in Ameritech's access tariff(s). If the Requesting Carrier does not possess STPs, Requesting Carrier may purchase access to Ameritech's SS7 Network as provided in Ameritech's access tariff(s). 4.5.3 4.4.3 The Parties will cooperate on the exchange of Transactional Capabilities Application Part (TCAP) messages to facilitate interoperability of CCIS-based features between their respective networks, including all CLASS features and functions, to the extent each Party offers such features and functions to its Customers. All CCIS signaling parameters will be provided provided, including Calling Party Number (CPN), Originating Line Information (OLI), calling party category and charge number. For terminating exchange accessExchange Access and Transit Service traffic, such information shall be passed by a Party to the extent that such information is provided to such Party. 4.5.4 4.4.4 Where available and upon the request of the other Party, each Party shall cooperate to ensure that its trunk groups are configured utilizing the B8ZS ESF protocol for 64 kbps Kbps clear channel transmission to allow for ISDN interoperability between the Parties’ ' respective networks.

Signaling. Signaling Interconnection may be used for signaling between Requesting Carrier switches, between Requesting Carrier switches and Ameritech switches, and between Requesting Carrier switches and those third party networks with which Ameritech’s SS7 network is interconnected. 4.5.1 IV.4.1 Where available, Common Channel Interoffice Signaling (CCIS) signaling shall be used by the Parties to set up calls between the Parties' ’ Telephone Exchange Service networks. Each Party shall supply Calling Party Number (CPN) (NPA/NXX assigned to its local exchange switch) within the SS7 signaling message, if available. If CCIS is unavailable, MF (Multi-FrequencyFrequency (MF) signaling shall be used by the Parties. Each Party shall charge the other Party equal and reciprocal rates for CCIS signaling at the rates set forth at Item V of the Pricing Schedule. 4.5.2 IV.4.2 Each Party is responsible for requesting Interconnection to the other Party’s CCIS network, where SS7 signaling on the trunk group(s) is desired. Each Party shall connect to a pair of access STPs that serve each LATA where traffic will be exchanged using a direct connection to the STPs serving the desired LATA, through the designated Ameritech state gateway STP or shall arrange for signaling connectivity through a third party provider which is connected to the other Party’s signaling network. The Parties shall establish Interconnection at the STP. The rate for signaling links to establish such Interconnection is as provided in Ameritech’s access tariff(s). If the Requesting Carrier does not possess STPs, Requesting Carrier may purchase access to Ameritech’s SS7 Network as provided in Ameritech’s access tariff(s). 4.5.3 IV.4.3 The Parties will cooperate on the exchange of Transactional Capabilities Application Part (TCAP) messages to facilitate interoperability of CCIS-based features between their respective networks, including all CLASS features and functions, to the extent each Party offers such features and functions to its Customers. All CCIS signaling parameters will be provided provided, including Calling Party Number (CPN), Originating Line Information (OLI), calling party category and charge number. For terminating exchange accessExchange Access and Transit Service traffic, such information shall be passed by a Party to the extent that such information is provided to such Party. 4.5.4 IV.4.4 Where available and upon the request of the other Party, each Party shall cooperate to ensure that its trunk groups are configured utilizing the B8ZS ESF protocol for 64 kbps Kbps clear channel transmission to allow for ISDN interoperability between the Parties’ respective networks.

Signaling. Signaling Interconnection may be used for signaling between Requesting Carrier switches, between Requesting Carrier switches and Ameritech switches, and between Requesting Carrier switches and those third party networks with which Ameritech’s SS7 network is interconnected. 4.5.1 4.4.1 Where available, Common Channel Interoffice Signaling (CCIS) signaling shall be used by the Parties to set up calls between the Parties' Telephone Exchange Service networks. Each Party shall supply Calling Party Number (CPN) within the SS7 signaling message, if available. If CCIS is unavailable, MF (Multi-Frequency) signaling shall be used by the Parties. Each Party shall charge the other Party equal and reciprocal rates for CCIS signaling at the rates set forth at Item V of the Pricing Schedule. 4.5.2 4.4.2 Each Party is responsible for requesting Interconnection to the other Party’s CCIS network, where SS7 signaling on the trunk group(s) is desired. Each Party shall connect to a pair of access STPs that serve each LATA where traffic will be exchanged or shall arrange for signaling connectivity through a third party provider which is connected to the other Party’s signaling network. The Parties shall establish Interconnection at the STP. 4.5.3 4.4.3 The Parties will cooperate on the exchange of Transactional Capabilities Application Part (TCAP) messages to facilitate interoperability of CCIS-based features between their respective networks, including all CLASS features and functions, to the extent each Party offers such features and functions to its Customers. All CCIS signaling parameters will be provided including Calling Party Number (CPN), Originating Line Information (OLI), calling party category and charge number. For terminating exchange access, such information shall be passed by a Party to the extent that such information is provided to such Party. 4.5.4 4.4.4 Where available and upon the request of the other Party, each Party shall cooperate to ensure that its trunk groups are configured utilizing the B8ZS ESF protocol for 64 kbps clear channel transmission to allow for ISDN interoperability between the Parties’ respective networks.

Signaling. Signaling Interconnection may be used for signaling between Requesting Carrier Urban Media switches, between Requesting Carrier Urban Media switches and Ameritech switches, and between Requesting Carrier Urban Media switches and those third party networks interconnected with which Ameritech’s SS7 network is interconnectednetwork. 4.5.1 IV.4.1 Where available, Common Channel Interoffice Signaling (CCIS) signaling shall be used by the Parties to set up calls between the Parties' Telephone Exchange Service networks. Each Party shall supply Calling Party Number (CPN) within the SS7 signaling message, if available. If CCIS is unavailable, MF (Multi-FrequencyFrequency (MF) signaling shall be used by the Parties. Each Party shall charge the other Party equal and reciprocal rates for CCIS signaling at the rates set forth at Item V of the Pricing Schedule. 4.5.2 IV.4.2 Each Party is responsible for requesting Interconnection to the other Party’s CCIS network, where SS7 signaling on the trunk group(s) is desired. Each Party shall connect to a pair of access STPs that serve each LATA where traffic will be exchanged or shall arrange for signaling connectivity through a third party provider which is connected to the other Party’s signaling network. The Parties shall establish Interconnection at the STP. 4.5.3 IV.4.3 The Parties will cooperate on the exchange of Transactional Capabilities Application Part (TCAP) messages to facilitate interoperability of CCIS-based features between their respective networks, including all CLASS features and functions, to the extent each Party offers such features and functions to its Customers. All CCIS signaling parameters will be provided including Calling Party Number (CPN), Originating Line Information (OLI), calling party category and charge number. For terminating exchange accessExchange Access traffic, such information shall be passed by a Party to the extent that such information is provided to such Party. 4.5.4 IV.4.4 Where available and upon the request of the other Party, each Party shall cooperate to ensure that its trunk groups are configured utilizing the B8ZS ESF protocol for 64 kbps clear channel transmission to allow for ISDN interoperability between the Parties’ respective networks.