Common use of Threshold Billing Plan Clause in Contracts

Threshold Billing Plan. The Parties agree that Al-Call will incur the mechanized rate for all LSRs, both mechanized (LENS, EDI, EDI-PC, and TAG) and manual, if the percentage of mechanized LSRs to total LSRs meets or exceeds the threshold percentages shown below Year Ratio: Mechanized/Total LSRs 2000 80% 2001 90% The threshold plan will be discontinued in 2002. EXHIBIT A In calculating the percentages above, all orders submitted via BellSouth’s mechanized LSR systems (LENS, EDI, EDI-PC, and TAG) will count as mechanized LSRs, regardless of whether an order falls out of the mechanized process or requires manual intervention in order to be properly completed and processed. BellSouth will track the total LSR volume for each CLEC for each quarter. At the end of that time period, a Percent Electronic LSR calculation will be made for that quarter based on the LSR data tracked in the LCSC. If this percentage exceeds the threshold volume, all of that CLECs’ future manual LSRs will be billed at the mechanized LSR rate. To allow time for obtaining and analyzing the data and updating the billing system, this billing change will take place on the first day of the second month following the end of the quarter (e.g., May 1 for 1Q, Aug 1 for 2Q, etc.). There will be no adjustments to the amount billed for previously billed LSRs. EXCLUSIONS AND LIMITATIONS ON SERVICES AVAILABLE FOR RESALE Type of Service AL FL GA KY LA Resale? Discount? Resale? Discount? Resale? Discount? Resale? Discount? Resale? Discount? 1 Grandfathered Services (Note 1) Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes 6 911/E911 Services Yes Yes Yes Yes Yes Yes Yes Yes No No 8 AdWatchSM Svc (See Note 6) Yes yes Yes yes Yes yes Yes yes Yes Yes 10 Mobile Services Yes No Yes No Yes No Yes No Yes No 11 Federal Subscriber Line Charges Yes No Yes No Yes No Yes No Yes No 12 Non-Recurring Charges Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes 13 End User Line Charge – Number Portability Yes No Yes No Yes No Yes No Yes No Type of Service MS NC SC TN Resale? Discount? Resale? Discount? Resale? Discount? Resale? Discount? 1 Grandfathered Services (Note 1) Yes Yes Yes Yes Yes Yes Yes Yes 2 Contract Service Arrangements Yes Yes Yes Yes Yes Yes Yes Yes 4 Promotions - < 90 Days (Note 2) Yes No Yes No Yes No Yes No 5 Lifeline/Link Up Services Yes Yes Yes Yes Yes Yes Yes Note 4 6 911/E911 Services Yes Yes Yes Yes Yes Yes Yes Yes

Threshold Billing Plan. The Parties agree that Al-Call TCI will incur the mechanized rate for all LSRs, both mechanized (LENS, EDI, EDI-PC, and TAG) and manual, if the percentage of mechanized LSRs to total LSRs meets or exceeds the threshold percentages shown below Year Ratio: Mechanized/Total LSRs 2000 80% 2001 90% The threshold plan will be discontinued in 2002. EXHIBIT A In calculating the percentages above, all orders submitted via BellSouth’s mechanized LSR systems (LENS, EDI, EDI-PC, and TAG) will count as mechanized LSRs, regardless of whether an order falls out of the mechanized process or requires manual intervention in order to be properly completed and processed. BellSouth will track the total LSR volume for each CLEC for each quarter. At the end of that time period, a Percent Electronic LSR calculation will be made for that quarter based on the LSR data tracked in the LCSC. If this percentage exceeds the threshold volume, all of that CLECs’ future manual LSRs will be billed at the mechanized LSR rate. To allow time for obtaining and analyzing the data and updating the billing system, this billing change will take place on the first day of the second month following the end of the quarter (e.g., May 1 for 1Q, Aug 1 for 2Q, etc.). There will be no adjustments to the amount billed for previously billed LSRs. EXCLUSIONS AND LIMITATIONS ON SERVICES AVAILABLE FOR RESALE Type of Service AL FL GA KY LA Resale? Discount? Resale? Discount? Resale? Discount? Resale? Discount? Resale? Discount? 1 Grandfathered Services (Note 1) Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes 5 Lifeline/Link Up Services Yes Yes Yes Yes Yes Yes Note 4 Note 4 Yes Yes 6 911/E911 Services Yes Yes Yes Yes Yes Yes Yes Yes No No 7 N11 Services Yes Yes Yes Yes Yes Yes No No No No 8 AdWatchSM Svc (See Note 6) Yes yes Yes yes Yes yes Yes yes Yes Yes 10 Mobile Services Yes No Yes No Yes No Yes No Yes No 11 Federal Subscriber Line Charges Yes No Yes No Yes No Yes No Yes No 12 Non-Recurring Charges Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes 13 End User Line Charge – Number Portability Yes No Yes No Yes No Yes No Yes No Type of Service MS NC SC TN Resale? Discount? Resale? Discount? Resale? Discount? Resale? Discount? 1 Grandfathered Services (Note 1) Yes Yes Yes Yes Yes Yes Yes Yes 2 Contract Service Arrangements Yes Yes Yes Yes Yes Yes Yes Yes 4 Promotions - < 90 Days (Note 2) Yes No Yes No Yes No Yes No 5 Lifeline/Link Up Services Yes Yes Yes Yes Yes Yes Yes Note 4 6 911/E911 Services Yes Yes Yes Yes Yes Yes Yes Yes

Threshold Billing Plan. The Parties agree that Al-Call Cbeyond will incur the mechanized rate for all LSRs, both mechanized (LENS, EDI, EDI-EDI- PC, and TAG) and manual, if the percentage of mechanized LSRs to total LSRs meets or exceeds the threshold percentages shown below Year Ratio: Mechanized/Total LSRs 2000 80% 2001 90% The threshold plan will be discontinued in 2002. EXHIBIT A In calculating the percentages above, all orders submitted via BellSouth’s mechanized LSR systems (LENS, EDI, EDI-PC, and TAG) will count as mechanized LSRs, regardless of whether an order falls out of the mechanized process or requires manual intervention in order to be properly completed and processed. BellSouth will track the total LSR volume for each CLEC for each quarter. At the end of that time period, a Percent Electronic LSR calculation will be made for that quarter based on the LSR data tracked in the LCSC. If this percentage exceeds the threshold volume, all of that CLECs’ future manual LSRs will be billed at the mechanized LSR rate. To allow time for obtaining and analyzing the data and updating the billing system, this billing change will take place on the first day of the second month following the end of the quarter (e.g., May 1 for 1Q, Aug 1 for 2Q, etc.). There will be no adjustments to the amount billed for previously billed LSRs. EXCLUSIONS AND LIMITATIONS ON SERVICES AVAILABLE FOR RESALE Type of Service AL FL GA KY LA Resale? Discount? Resale? Discount? Resale? Discount? Resale? Discount? Resale? Discount? 1 Grandfathered Services (Note 1) Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes 5 Lifeline/Link Up Services Yes Yes Yes Yes Yes Yes Note 4 Note 4 Yes Yes 6 911/E911 Services Yes Yes Yes Yes Yes Yes Yes Yes No No 7 N11 Services Yes Yes Yes Yes Yes Yes No No No No 8 AdWatchSM Svc (See Note 6) Yes yes Yes yes Yes yes Yes yes Yes Yes 10 Mobile Services Yes No Yes No Yes No Yes No Yes No 11 Federal Subscriber Line Charges Yes No Yes No Yes No Yes No Yes No 12 Non-Recurring Charges Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes 13 End User Line Charge – Number Portability Yes No Yes No Yes No Yes No Yes No Type of Service MS NC SC TN Resale? Discount? Resale? Discount? Resale? Discount? Resale? Discount? 1 Grandfathered Services (Note 1) Yes Yes Yes Yes Yes Yes Yes Yes 2 Contract Service Arrangements Yes Yes Yes Yes Yes Yes Yes Yes 4 Promotions - < 90 Days (Note 2) Yes No Yes No Yes No Yes No 5 Lifeline/Link Up Services Yes Yes Yes Yes Yes Yes Yes Note 4 6 911/E911 Services Yes Yes Yes Yes Yes Yes Yes Yes

Threshold Billing Plan. The Parties agree that Al-Call Connect! will incur the mechanized rate for all LSRs, both mechanized (LENS, EDI, EDI-EDI- PC, and TAG) and manual, if the percentage of mechanized LSRs to total LSRs meets or exceeds the threshold percentages shown below Year Ratio: Mechanized/Total LSRs 2000 80% 2001 90% The threshold plan will be discontinued in 2002. EXHIBIT A In calculating the percentages above, all orders submitted via BellSouth’s mechanized LSR systems (LENS, EDI, EDI-PC, and TAG) will count as mechanized LSRs, regardless of whether an order falls out of the mechanized process or requires manual intervention in order to be properly completed and processed. BellSouth will track the total LSR volume for each CLEC for each quarter. At the end of that time period, a Percent Electronic LSR calculation will be made for that quarter based on the LSR data tracked in the LCSC. If this percentage exceeds the threshold volume, all of that CLECs’ future manual LSRs will be billed at the mechanized LSR rate. To allow time for obtaining and analyzing the data and updating the billing system, this billing change will take place on the first day of the second month following the end of the quarter (e.g., May 1 for 1Q, Aug 1 for 2Q, etc.). There will be no adjustments to the amount billed for previously billed LSRs. EXCLUSIONS AND LIMITATIONS ON SERVICES AVAILABLE FOR RESALE Type of Service AL FL GA KY LA Resale? Discount? Resale? Discount? Resale? Discount? Resale? Discount? Resale? Discount? 1 Grandfathered Services (Note 1) Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes 5 Lifeline/Link Up Services Yes Yes Yes Yes Yes Yes Note 4 Note 4 Yes Yes 6 911/E911 Services Yes Yes Yes Yes Yes Yes Yes Yes No No 7 N11 Services Yes Yes Yes Yes Yes Yes No No No No 8 AdWatchSM Svc (See Note 6) Yes yes Yes yes Yes yes Yes yes Yes Yes 10 Mobile Services Yes No Yes No Yes No Yes No Yes No 11 Federal Subscriber Line Charges Yes No Yes No Yes No Yes No Yes No 12 Non-Recurring Charges Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes 13 End User Line Charge – Number Portability Yes No Yes No Yes No Yes No Yes No Type of Service MS NC SC TN Resale? Discount? Resale? Discount? Resale? Discount? Resale? Discount? 1 Grandfathered Services (Note 1) Yes Yes Yes Yes Yes Yes Yes Yes 2 Contract Service Arrangements Yes Yes Yes Yes Yes Yes Yes Yes 4 Promotions - < 90 Days (Note 2) Yes No Yes No Yes No Yes No 5 Lifeline/Link Up Services Yes Yes Yes Yes Yes Yes Yes Note 4 6 911/E911 Services Yes Yes Yes Yes Yes Yes Yes Yes4

Threshold Billing Plan. The Parties agree that Al-Call Intermedia will incur the mechanized rate for all LSRs, both mechanized (LENS, EDI, EDI-PC, and TAG) and manual, if the percentage of mechanized LSRs to total LSRs meets or exceeds the threshold percentages shown below below: Year Ratio: Mechanized/Total LSRs 1999 70% 2000 80% 2001 90% The threshold plan will be discontinued in 2002. EXHIBIT A In calculating the percentages above, all orders submitted via BellSouth’s mechanized LSR systems (LENS, EDI, EDI-PC, and TAG) will count as mechanized LSRs, regardless of whether an order falls out of the mechanized process or requires manual intervention in order to be properly completed and processed. BellSouth will track the total LSR volume for each CLEC for each quarter. At the end of that time period, a Percent Electronic LSR calculation will be made for that quarter based on the LSR data tracked in the LCSC. If this percentage exceeds the threshold volume, all of that CLECs’ future manual LSRs will be billed at the mechanized LSR rate. To allow time for obtaining and analyzing the data and updating the billing system, this billing change will take place on the first day of the second month following the end of the quarter (e.g., e.g. May 1 for 1Q, Aug 1 for 2Q, etc.). There will be no adjustments to the amount billed for previously billed LSRs. The Parties agree that any charges BellSouth is unable to xxxx on April 15, 1999 will be trued up on or about July 1, 1999. EXCLUSIONS AND LIMITATIONS ON SERVICES AVAILABLE FOR RESALE . Exhibit B Page 1 of 2 Type of Service AL FL GA KY LA Resale? Discount? Resale? Discount? Resale? Discount? Resale? Discount? Resale? Discount? 1 Grandfathered Services (Note 1) Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes 5 Lifeline/Link Up Services Yes Yes Yes Yes Yes Yes Note 4 Note 4 Yes Yes 6 911/E911 Services Yes Yes Yes Yes Yes Yes Yes Yes No No 7 N11 Services Yes Yes Yes Yes Yes Yes No No No No 8 AdWatchSM Svc (See Note 6) Yes yes Yes yes Yes yes Yes yes Yes Yes Yes Yes Yes Yes 10 Mobile Services Yes No Yes No Yes No Yes No Yes No 11 Federal Subscriber Line Charges Yes No Yes No Yes No Yes No Yes No 12 Non-Recurring Charges Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes 13 End User Line Charge – Number Portability Yes No Yes No Yes No Yes No Yes No Type of Service MS NC SC TN Resale? Discount? Resale? Discount? Resale? Discount? Resale? Discount? 1 Grandfathered Services (Note 1) Yes Yes Yes Yes Yes Yes Yes Yes 2 Contract Service Arrangements Yes Yes Yes Yes Yes Yes Yes Yes 4 Promotions - < 90 Days (Note 2) Yes No Yes No Yes No Yes No No 5 Lifeline/Link Up Services Yes Yes Yes Yes Yes Yes Yes Note 4 6 911/E911 Services Yes Yes Yes Yes Yes Yes Yes Yes

Threshold Billing Plan. The Parties agree that Al-Call Xxxxxxxx will incur the mechanized rate for all LSRs, both mechanized (LENS, EDI, EDI-PC, and TAG) and manual, if the percentage of mechanized LSRs to total LSRs meets or exceeds the threshold percentages shown below below: Year Ratio: Mechanized/Total LSRs 1999 70% 2000 80% 2001 90% The threshold plan will be discontinued in 2002. EXHIBIT A In calculating the percentages above, all orders submitted via BellSouth’s mechanized LSR systems (LENS, EDI, EDI-PC, and TAG) will count as mechanized LSRs, regardless of whether an order falls out of the mechanized process or requires manual intervention in order to be properly completed and processed. BellSouth will track the total LSR volume for each CLEC for each quarter. At the end of that time period, a Percent Electronic LSR calculation will be made for that quarter based on the LSR data tracked in the LCSC. If this percentage exceeds the threshold volume, all of that CLECs’ future manual LSRs will be billed at the mechanized LSR rate. To allow time for obtaining and analyzing the data and updating the billing system, this billing change will take place on the first day of the second month following the end of the quarter (e.g., e.g. May 1 for 1Q, Aug 1 for 2Q, etc.). There will be no adjustments to the amount billed for previously billed LSRs. The Parties agree that any charges XxxxXxxxx is unable to bill on April 15, 1999 will be trued up on or about July 1, 1999. EXCLUSIONS AND LIMITATIONS ON SERVICES AVAILABLE FOR RESALE . Exhibit B Page 1 of 2 Type of Service AL FL GA KY LA Resale? DiscountDiscount ? Resale? Discount ? Resale? Discount ? Resale? Discount? Resale? Discount? Resale? Discount? ResaleResale ? Discount? 1 Grandfathered Services (Note 1) Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes 5 Lifeline/Link Up Services Yes Yes Yes Yes Yes Yes Note 4 Note 4 Yes Yes 6 911/E911 Services Yes Yes Yes Yes Yes Yes Yes Yes No No 7 N11 Services Yes Yes Yes Yes Yes Yes No No No No 8 AdWatchSM Svc (See Note 6) Yes yes No Yes yes No Yes yes No Yes yes No Yes Yes No 10 Mobile Services Yes No Yes No Yes No Yes No Yes No 11 Federal Subscriber Line Charges Yes No Yes No Yes No Yes No Yes No 12 Non-Recurring Charges Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes 13 End User Line Charge – Number Portability Yes No Yes No Yes No Yes No Yes No Type of Service MS NC SC TN Resale? DiscountDiscount ? Resale? DiscountDiscount ? Resale? DiscountDiscount ? ResaleResale ? Discount? 1 Grandfathered Services (Note 1) Yes Yes Yes Yes Yes Yes Yes Yes 2 Contract Service Arrangements Yes Yes Yes Yes Yes Yes Yes Yes 4 Promotions - < 90 Days (Note 2) Yes No Yes No Yes No Yes No No 5 Lifeline/Link Up Services Yes Yes Yes Yes Yes Yes Yes Note 4 6 911/E911 Services Yes Yes Yes Yes Yes Yes Yes Yes

Threshold Billing Plan. The Parties agree that Al-Call MET Communications will incur the mechanized rate for all LSRs, both mechanized (LENS, EDI, EDI-PC, and TAG) and manual, if the percentage of mechanized LSRs to total LSRs meets or exceeds the threshold percentages shown below below: Year Ratio: Mechanized/Total LSRs 1999 70% 2000 80% 2001 90% The threshold plan will be discontinued in 2002. EXHIBIT A In calculating the percentages above, all orders submitted via BellSouth’s mechanized LSR systems (LENS, EDI, EDI-PC, and TAG) will count as mechanized LSRs, regardless of whether an order falls out of the mechanized process or requires manual intervention in order to be properly completed and processed. BellSouth will track the total LSR volume for each CLEC for each quarter. At the end of that time period, a Percent Electronic LSR calculation will be made for that quarter based on the LSR data tracked in the LCSC. If this percentage exceeds the threshold volume, all of that CLECs’ future manual LSRs will be billed at the mechanized LSR rate. To allow time for obtaining and analyzing the data and updating the billing system, this billing change will take place on the first day of the second month following the end of the quarter (e.g., e.g. May 1 for 1Q, Aug 1 for 2Q, etc.). There will be no adjustments to the amount billed for previously billed LSRs. The Parties agree that any charges XxxxXxxxx is unable to bill on April 15, 1999 will be trued up on or about July 1, 1999. EXCLUSIONS AND LIMITATIONS ON SERVICES AVAILABLE FOR RESALE . Exhibit B Page 1 of 2 Type of Service AL FL GA KY LA Resale? Discount? Resale? Discount? Resale? Discount? Resale? Discount? Resale? Discount? 1 Grandfathered Services (Note 1) Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes 5 Lifeline/Link Up Services Yes Yes Yes Yes Yes Yes Note 4 Note 4 Yes Yes 6 911/E911 Services Yes Yes Yes Yes Yes Yes Yes Yes No No 7 N11 Services Yes Yes Yes Yes Yes Yes No No No No 8 AdWatchSM Svc (See Note 6) Yes yes No Yes yes No Yes yes No Yes yes No Yes Yes No 10 Mobile Services Yes No Yes No Yes No Yes No Yes No 11 Federal Subscriber Line Charges Yes No Yes No Yes No Yes No Yes No 12 Non-Recurring Charges Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes 13 End User Line Charge – Number Portability Yes No Yes No Yes No Yes No Yes No Type of Service MS NC SC TN Resale? Discount? Resale? Discount? Resale? Discount? Resale? Discount? 1 Grandfathered Services (Note 1) Yes Yes Yes Yes Yes Yes Yes Yes 2 Contract Service Arrangements Yes Yes Yes Yes Yes Yes Yes Yes 4 Promotions - < 90 Days (Note 2) Yes No Yes No Yes No Yes No No 5 Lifeline/Link Up Services Yes Yes Yes Yes Yes Yes Yes Note 4 6 911/E911 Services Yes Yes Yes Yes Yes Yes Yes Yes

Threshold Billing Plan. The Parties agree that Al-Call Comm South will incur the mechanized rate for all LSRs, both mechanized (LENS, EDI, EDI-PC, and TAG) and manual, if the percentage of mechanized LSRs to total LSRs meets or exceeds the threshold percentages shown below below: Year Ratio: Mechanized/Total LSRs 1999 70% 2000 80% 2001 90% The threshold plan will be discontinued in 2002. EXHIBIT A In calculating the percentages above, all orders submitted via BellSouth’s mechanized LSR systems (LENS, EDI, EDI-PC, and TAG) will count as mechanized LSRs, regardless of whether an order falls out of the mechanized process or requires manual intervention in order to be properly completed and processed. BellSouth will track the total LSR volume for each CLEC for each quarter. At the end of that time period, a Percent Electronic LSR calculation will be made for that quarter based on the LSR data tracked in the LCSC. If this percentage exceeds the threshold volume, all of that CLECs’ future manual LSRs will be billed at the mechanized LSR rate. To allow time for obtaining and analyzing the data and updating the billing system, this billing change will take place on the first day of the second month following the end of the quarter (e.g., e.g. May 1 for 1Q, Aug 1 for 2Q, etc.). There will be no adjustments to the amount billed for previously billed LSRs. The Parties agree that any charges XxxxXxxxx is unable to bill on April 15, 1999 will be trued up on or about July 1, 1999. EXCLUSIONS AND LIMITATIONS ON SERVICES AVAILABLE FOR RESALE . Exhibit B Page 1 of 2 Type of Service AL FL GA KY LA Resale? Discount? Resale? Discount? Resale? Discount? Resale? Discount? Resale? Discount? 1 Grandfathered Services (Note 1) Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes 5 Lifeline/Link Up Services Yes Yes Yes Yes Yes Yes Note 4 Note 4 Yes Yes 6 911/E911 Services Yes Yes Yes Yes Yes Yes Yes Yes No No 7 N11 Services Yes Yes Yes Yes Yes Yes No No No No 8 AdWatchSM Svc (See Note 6) Yes yes No Yes yes No Yes yes No Yes yes No Yes Yes No 10 Mobile Services Yes No Yes No Yes No Yes No Yes No 11 Federal Subscriber Line Charges Yes No Yes No Yes No Yes No Yes No 12 Non-Recurring Charges Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes 13 End User Line Charge – Number Portability Yes No Yes No Yes No Yes No Yes No Type of Service MS NC SC TN Resale? Discount? Resale? Discount? Resale? Discount? Resale? Discount? 1 Grandfathered Services (Note 1) Yes Yes Yes Yes Yes Yes Yes Yes 2 Contract Service Arrangements Yes Yes Yes Yes Yes Yes Yes Yes 4 Promotions - < 90 Days (Note 2) Yes No Yes No Yes No Yes No No 5 Lifeline/Link Up Services Yes Yes Yes Yes Yes Yes Yes Note 4 6 911/E911 Services Yes Yes Yes Yes Yes Yes Yes Yes

Threshold Billing Plan. The Parties agree that Al-Call ACCESS Integrated will incur the mechanized rate for all LSRs, both mechanized (LENS, EDI, EDI-PC, and TAG) and manual, if the percentage of mechanized LSRs to total LSRs meets or exceeds the threshold percentages shown below below: Year Ratio: Mechanized/Total LSRs 1999 70% 2000 80% 2001 90% EXHIBIT A Page 3 of 3 The threshold plan will be discontinued in 2002. EXHIBIT A In calculating the percentages above, all orders submitted via BellSouth’s mechanized LSR systems (LENS, EDI, EDI-PC, and TAG) will count as mechanized LSRs, regardless of whether an order falls out of the mechanized process or requires manual intervention in order to be properly completed and processed. BellSouth will track the total LSR volume for each CLEC for each quarter. At the end of that time period, a Percent Electronic LSR calculation will be made for that quarter based on the LSR data tracked in the LCSC. If this percentage exceeds the threshold volume, all of that CLECs’ future manual LSRs will be billed at the mechanized LSR rate. To allow time for obtaining and analyzing the data and updating the billing system, this billing change will take place on the first day of the second month following the end of the quarter (e.g., e.g. May 1 for 1Q, Aug 1 for 2Q, etc.). There will be no adjustments to the amount billed for previously billed LSRs. The Parties agree that any charges BellSouth is unable to xxxx on April 15, 1999 will be trued up on or about July 1, 1999. EXCLUSIONS AND LIMITATIONS ON SERVICES AVAILABLE FOR RESALE . Exhibit B Page 1 of 2 Type of Service AL FL GA KY LA Resale? DiscountDiscount ? Resale? Discount ? Resale? Discount ? Resale? Discount? ResaleResale ? Discount? Resale? Discount? Resale? DiscountDiscount ? 1 Grandfathered Services (Note 1) Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes 5 Lifeline/Link Up Services Yes Yes Yes Yes Yes Yes Note 4 Note 4 Yes Yes 6 911/E911 Services Yes Yes Yes Yes Yes Yes Yes Yes No No 7 N11 Services Yes Yes Yes Yes Yes Yes No No No No 8 AdWatchSM Svc (See Note 6) Yes yes No Yes yes No Yes yes No Yes yes No Yes Yes No 10 Mobile Services Yes No Yes No Yes No Yes No Yes No 11 Federal Subscriber Line Charges Yes No Yes No Yes No Yes No Yes No 12 Non-Recurring Charges Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes 13 End User Line Charge – Number Portability Yes No Yes No Yes No Yes No Yes No Type of Service MS NC SC TN Resale? DiscountDiscount ? Resale? DiscountDiscount ? Resale? DiscountDiscount ? ResaleResale ? Discount? 1 Grandfathered Services (Note 1) Yes Yes Yes Yes Yes Yes Yes Yes 2 Contract Service Arrangements Yes Yes Yes Yes Yes Yes Yes Yes 4 Promotions - < 90 Days (Note 2) Yes No Yes No Yes No Yes No No 5 Lifeline/Link Up Services Yes Yes Yes Yes Yes Yes Yes Note 4 6 911/E911 Services Yes Yes Yes Yes Yes Yes Yes Yes

Threshold Billing Plan. The Parties agree that AlMax-Call Tel will incur the mechanized rate for all LSRs, both mechanized (LENS, EDI, EDI-PC, and TAG) and manual, if the percentage of mechanized LSRs to total LSRs meets or exceeds the threshold percentages shown below below: Year Ratio: Mechanized/Total LSRs 1999 70% 2000 80% 2001 90% The threshold plan will be discontinued in 2002. EXHIBIT A In calculating the percentages above, all orders submitted via BellSouth’s mechanized LSR systems (LENS, EDI, EDI-PC, and TAG) will count as mechanized LSRs, regardless of whether an order falls out of the mechanized process or requires manual intervention in order to be properly completed and processed. BellSouth will track the total LSR volume for each CLEC for each quarter. At the end of that time period, a Percent Electronic LSR calculation will be made for that quarter based on the LSR data tracked in the LCSC. If this percentage exceeds the threshold volume, all of that CLECs’ future manual LSRs will be billed at the mechanized LSR rate. To allow time for obtaining and analyzing the data and updating the billing system, this billing change will take place on the first day of the second month following the end of the quarter (e.g., e.g. May 1 for 1Q, Aug 1 for 2Q, etc.). There will be no adjustments to the amount billed for previously billed LSRs. The Parties agree that any charges XxxxXxxxx is unable to bill on April 15, 1999 will be trued up on or about July 1, 1999. EXCLUSIONS AND LIMITATIONS ON SERVICES AVAILABLE FOR RESALE . Exhibit B Page 1 of 2 Type of Service AL FL GA KY LA Resale? Discount? Resale? Discount? Resale? Discount? Resale? Discount? Resale? Discount? 1 Grandfathered Services (Note 1) Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes 5 Lifeline/Link Up Services Yes Yes Yes Yes Yes Yes Note 4 Note 4 Yes Yes 6 911/E911 Services Yes Yes Yes Yes Yes Yes Yes Yes No No 7 N11 Services Yes Yes Yes Yes Yes Yes No No No No 8 AdWatchSM Svc (See Note 6) Yes yes No Yes yes No Yes yes No Yes yes No Yes Yes No 10 Mobile Services Yes No Yes No Yes No Yes No Yes No 11 Federal Subscriber Line Charges Yes No Yes No Yes No Yes No Yes No 12 Non-Recurring Charges Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes 13 End User Line Charge – Number Portability Yes No Yes No Yes No Yes No Yes No Type of Service MS NC SC TN Resale? Discount? Resale? Discount? Resale? Discount? Resale? Discount? 1 Grandfathered Services (Note 1) Yes Yes Yes Yes Yes Yes Yes Yes 2 Contract Service Arrangements Yes Yes Yes Yes Yes Yes Yes Yes 4 Promotions - < 90 Days (Note 2) Yes No Yes No Yes No Yes No No 5 Lifeline/Link Up Services Yes Yes Yes Yes Yes Yes Yes Note 4 6 911/E911 Services Yes Yes Yes Yes Yes Yes Yes Yes

Threshold Billing Plan. The Parties agree that Al-Call Xxxxxxxxx.xxx will incur the mechanized rate for all LSRs, both mechanized (LENS, EDI, EDI-PC, and TAG) and manual, if the percentage of mechanized LSRs to total LSRs meets or exceeds the threshold percentages shown below below: Year Ratio: Mechanized/Total LSRs 1999 70% 2000 80% 2001 90% The threshold plan will be discontinued in 2002. EXHIBIT A In calculating the percentages above, all orders submitted via BellSouth’s mechanized LSR systems (LENS, EDI, EDI-PC, and TAG) will count as mechanized LSRs, regardless of whether an order falls out of the mechanized process or requires manual intervention in order to be properly completed and processed. BellSouth will track the total LSR volume for each CLEC for each quarter. At the end of that time period, a Percent Electronic LSR calculation will be made for that quarter based on the LSR data tracked in the LCSC. If this percentage exceeds the threshold volume, all of that CLECs’ ' future manual LSRs will be billed at the mechanized LSR rate. To allow time for obtaining and analyzing the data and updating the billing system, this billing change will take place on the first day of the second month following the end of the quarter (e.g., e.g. May 1 for 1Q, Aug 1 for 2Q, etc.). There will be no adjustments to the amount billed for previously billed LSRs. The Parties agree that any charges BellSouth is unable to xxxx on April 15, 1999 will be trued up on or about July 1, 1999. EXCLUSIONS AND LIMITATIONS ON SERVICES AVAILABLE FOR RESALE Type of Service --------------------------------------------------------------------------------------------------------------------------------- AL FL GA KY LA Type of ---------------------------------------------------------------------------------------------- Service Resale? Discount? Resale? Discount? Resale? Discount? Resale? Discount? Resale? Discount? --------------------------------------------------------------------------------------------------------------------------------- 1 Grandfathered Services (Note 1) Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes --------------------------------------------------------------------------------------------------------------------------------- 2 Contract Service Arrangements Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes --------------------------------------------------------------------------------------------------------------------------------- 3 Promotions - > 90 Days (Note 2) Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes --------------------------------------------------------------------------------------------------------------------------------- 4 Promotions - < 90 Days (Note 2) Yes No Yes No Yes No No No Yes No --------------------------------------------------------------------------------------------------------------------------------- 5 Lifeline/Link Up Services Yes Yes Yes Yes Yes Yes Note 4 Note 4 Yes Yes --------------------------------------------------------------------------------------------------------------------------------- 6 911/E911 911 /E911 Services Yes Yes Yes Yes Yes Yes Yes Yes No No --------------------------------------------------------------------------------------------------------------------------------- 7 N11 Services Yes Yes Yes Yes Yes Yes No No No No --------------------------------------------------------------------------------------------------------------------------------- 8 AdWatchSM AdWatch-SM- Svc (See Note 6) Yes yes No Yes yes No Yes yes No Yes yes No Yes No --------------------------------------------------------------------------------------------------------------------------------- 9 MemoryCall-Registered Trademark- Service Yes No Yes No Yes No Yes No Yes No --------------------------------------------------------------------------------------------------------------------------------- 10 Mobile Services Yes No Yes No Yes No Yes No Yes No --------------------------------------------------------------------------------------------------------------------------------- 11 Federal Subscriber Line Charges Yes No Yes No Yes No Yes No Yes No --------------------------------------------------------------------------------------------------------------------------------- 12 Non-Recurring Charges Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes --------------------------------------------------------------------------------------------------------------------------------- 13 End User Line Charge – - Number Portability Yes No Yes No Yes No Yes No Yes No Type of Service --------------------------------------------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------------------------- MS NC SC TN ----------------------------------------------------------------------------- Type of ----------------------------------------------------------------------------- Service Resale? Discount? Resale? Discount? Resale? Discount? Resale? Discount? ---------------------------------------------------------------------------------------------------------------- 1 Grandfathered Services (Note 1) Yes Yes Yes Yes Yes Yes Yes Yes ---------------------------------------------------------------------------------------------------------------- 2 Contract Service Arrangements Yes Yes Yes Yes Yes Yes Yes Yes ---------------------------------------------------------------------------------------------------------------- 3 Promotions - > 90 Days (Note 2) Yes Yes Yes Yes Yes Yes Yes Note 3 ---------------------------------------------------------------------------------------------------------------- 4 Promotions - < > 90 Days (Note 2) Yes No Yes No Yes No Yes No No ---------------------------------------------------------------------------------------------------------------- 5 Lifeline/Link Up Services Yes Yes Yes Yes Yes Yes Yes Note 4 ---------------------------------------------------------------------------------------------------------------- 6 911/E911 911 /E911 Services Yes Yes Yes Yes Yes Yes Yes YesYes ---------------------------------------------------------------------------------------------------------------- 7 N11 Services No No No No Yes Yes Yes Yes ---------------------------------------------------------------------------------------------------------------- 8 AdWatch-SM- Svc (See Note 6) Yes No Yes No Yes No Yes No ---------------------------------------------------------------------------------------------------------------- 9 MemoryCall-Registered Trademark- Service Yes No Yes No Yes No Yes No ---------------------------------------------------------------------------------------------------------------- 10 Mobile Services Yes No Yes No Yes No Yes No ---------------------------------------------------------------------------------------------------------------- 11 Federal Subscriber Line Charges Yes No Yes No Yes No Yes No ---------------------------------------------------------------------------------------------------------------- 12 Non-Recurring Charges Yes Yes Yes Yes Yes Yes Yes No ---------------------------------------------------------------------------------------------------------------- 13 End User Line Charge - Number Portability Yes No Yes No Yes No Yes No ---------------------------------------------------------------------------------------------------------------- APPLICABLE NOTES:

Threshold Billing Plan. The Parties agree that Al-Call Xxxxxxxx will incur the mechanized rate for all LSRs, both mechanized (LENS, EDI, EDI-PC, and TAG) and manual, if the percentage of mechanized LSRs to total LSRs meets or exceeds the threshold percentages shown below below: Year Ratio: Mechanized/Total LSRs 1999 70% 2000 80% 2001 90% The threshold plan will be discontinued in 2002. EXHIBIT A In calculating the percentages above, all orders submitted via BellSouth’s mechanized LSR systems (LENS, EDI, EDI-PC, and TAG) will count as mechanized LSRs, regardless of whether an order falls out of the mechanized process or requires manual intervention in order to be properly completed and processed. BellSouth will track the total LSR volume for each CLEC for each quarter. At the end of that time period, a Percent Electronic LSR calculation will be made for that quarter based on the LSR data tracked in the LCSC. If this percentage exceeds the threshold volume, all of that CLECs’ future manual LSRs will be billed at the mechanized LSR rate. To allow time for obtaining and analyzing the data and updating the billing system, this billing change will take place on the first day of the second month following the end of the quarter (e.g., e.g. May 1 for 1Q, Aug 1 for 2Q, etc.). There will be no adjustments to the amount billed for previously billed LSRs. The Parties agree that any charges XxxxXxxxx is unable to bill on April 15, 1999 will be trued up on or about July 1, 1999. EXCLUSIONS AND LIMITATIONS ON SERVICES AVAILABLE FOR RESALE . Exhibit B Page 1 of 2 Type of Service AL FL GA KY LA Resale? DiscountDiscount ? Resale? Discount ? Resale? Discount ? Resale? Discount? ResaleResale ? Discount? Resale? Discount? Resale? DiscountDiscount ? 1 Grandfathered Services (Note 1) Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes 5 Lifeline/Link Up Services Yes Yes Yes Yes Yes Yes Note 4 Note 4 Yes Yes 6 911/E911 Services Yes Yes Yes Yes Yes Yes Yes Yes No No 7 N11 Services Yes Yes Yes Yes Yes Yes No No No No 8 AdWatchSM Svc (See Note 6) Yes yes No Yes yes No Yes yes No Yes yes No Yes Yes No 10 Mobile Services Yes No Yes No Yes No Yes No Yes No 11 Federal Subscriber Line Charges Yes No Yes No Yes No Yes No Yes No 12 Non-Recurring Charges Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes 13 End User Line Charge – Number Portability Yes No Yes No Yes No Yes No Yes No Type of Service MS NC SC TN Resale? DiscountDiscount ? Resale? DiscountDiscount ? Resale? DiscountDiscount ? ResaleResale ? Discount? 1 Grandfathered Services (Note 1) Yes Yes Yes Yes Yes Yes Yes Yes 2 Contract Service Arrangements Yes Yes Yes Yes Yes Yes Yes Yes 4 Promotions - < 90 Days (Note 2) Yes No Yes No Yes No Yes No No 5 Lifeline/Link Up Services Yes Yes Yes Yes Yes Yes Yes Note 4 6 911/E911 Services Yes Yes Yes Yes Yes Yes Yes Yes

Threshold Billing Plan. The Parties agree that Al-Call Intermedia will incur the mechanized rate for all LSRs, both mechanized (LENS, EDI, EDI-PC, and TAG) and manual, if the percentage of mechanized LSRs to total LSRs meets or exceeds the threshold percentages shown below below: Year Ratio: Mechanized/Total LSRs 1999 70% 2000 80% 2001 90% The threshold plan will be discontinued in 2002. EXHIBIT A In calculating the percentages above, all orders submitted via BellSouth’s mechanized LSR systems (LENS, EDI, EDI-PC, and TAG) will count as mechanized LSRs, regardless of whether an order falls out of the mechanized process or requires manual intervention in order to be properly completed and processed. BellSouth will track the total LSR volume for each CLEC for each quarter. At the end of that time period, a Percent Electronic LSR calculation will be made for that quarter based on the LSR data tracked in the LCSC. If this percentage exceeds the threshold volume, all of that CLECs’ future manual LSRs will be billed at the mechanized LSR rate. To allow time for obtaining and analyzing the data and updating the billing system, this billing change will take place on the first day of the second month following the end of the quarter (e.g., e.g. May 1 for 1Q, Aug 1 for 2Q, etc.). There will be no adjustments to the amount billed for previously billed LSRs. The Parties agree that any charges XxxxXxxxx is unable to bill on April 15, 1999 will be trued up on or about July 1, 1999. EXCLUSIONS AND LIMITATIONS ON SERVICES AVAILABLE FOR RESALE . Exhibit B Page 1 of 2 Type of Service AL FL GA KY LA Resale? Discount? Resale? Discount? Resale? Discount? Resale? Discount? Resale? Discount? 1 Grandfathered Services (Note 1) Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes 5 Lifeline/Link Up Services Yes Yes Yes Yes Yes Yes Note 4 Note 4 Yes Yes 6 911/E911 Services Yes Yes Yes Yes Yes Yes Yes Yes No No 7 N11 Services Yes Yes Yes Yes Yes Yes No No No No 8 AdWatchSM Svc (See Note 6) Yes yes Yes yes Yes yes Yes yes Yes Yes Yes Yes Yes Yes 10 Mobile Services Yes No Yes No Yes No Yes No Yes No 11 Federal Subscriber Line Charges Yes No Yes No Yes No Yes No Yes No 12 Non-Recurring Charges Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes 13 End User Line Charge – Number Portability Yes No Yes No Yes No Yes No Yes No Type of Service MS NC SC TN Resale? Discount? Resale? Discount? Resale? Discount? Resale? Discount? 1 Grandfathered Services (Note 1) Yes Yes Yes Yes Yes Yes Yes Yes 2 Contract Service Arrangements Yes Yes Yes Yes Yes Yes Yes Yes 4 Promotions - < 90 Days (Note 2) Yes No Yes No Yes No Yes No No 5 Lifeline/Link Up Services Yes Yes Yes Yes Yes Yes Yes Note 4 6 911/E911 Services Yes Yes Yes Yes Yes Yes Yes Yes

Threshold Billing Plan. The Parties agree that Al-Call ACCESS Integrated will incur the mechanized rate for all LSRs, both mechanized (LENS, EDI, EDI-PC, and TAG) and manual, if the percentage of mechanized LSRs to total LSRs meets or exceeds the threshold percentages shown below below: Year Ratio: Mechanized/Total LSRs 1999 70% 2000 80% 2001 90% EXHIBIT A Page 3 of 3 The threshold plan will be discontinued in 2002. EXHIBIT A In calculating the percentages above, all orders submitted via BellSouth’s mechanized LSR systems (LENS, EDI, EDI-PC, and TAG) will count as mechanized LSRs, regardless of whether an order falls out of the mechanized process or requires manual intervention in order to be properly completed and processed. BellSouth will track the total LSR volume for each CLEC for each quarter. At the end of that time period, a Percent Electronic LSR calculation will be made for that quarter based on the LSR data tracked in the LCSC. If this percentage exceeds the threshold volume, all of that CLECs’ future manual LSRs will be billed at the mechanized LSR rate. To allow time for obtaining and analyzing the data and updating the billing system, this billing change will take place on the first day of the second month following the end of the quarter (e.g., e.g. May 1 for 1Q, Aug 1 for 2Q, etc.). There will be no adjustments to the amount billed for previously billed LSRs. The Parties agree that any charges BellSouth is unable to xxxx on April 15, 1999 will be trued up on or about July 1, 1999. EXCLUSIONS AND LIMITATIONS ON SERVICES AVAILABLE FOR RESALE . Exhibit B Page 1 of 2 Type of Service AL FL GA KY LA Resale? DiscountDiscount ? Resale? Discount ? Resale? Discount ? Resale? Discount? Resale? Discount? Resale? Discount? ResaleResale ? Discount? 1 Grandfathered Services (Note 1) Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes 5 Lifeline/Link Up Services Yes Yes Yes Yes Yes Yes Note 4 Note 4 Yes Yes 6 911/E911 Services Yes Yes Yes Yes Yes Yes Yes Yes No No 7 N11 Services Yes Yes Yes Yes Yes Yes No No No No 8 AdWatchSM Svc (See Note 6) Yes yes No Yes yes No Yes yes No Yes yes No Yes Yes No 10 Mobile Services Yes No Yes No Yes No Yes No Yes No 11 Federal Subscriber Line Charges Yes No Yes No Yes No Yes No Yes No 12 Non-Recurring Charges Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes 13 End User Line Charge – Number Portability Yes No Yes No Yes No Yes No Yes No Type of Service MS NC SC TN Resale? DiscountDiscount ? Resale? DiscountDiscount ? Resale? DiscountDiscount ? ResaleResale ? Discount? 1 Grandfathered Services (Note 1) Yes Yes Yes Yes Yes Yes Yes Yes 2 Contract Service Arrangements Yes Yes Yes Yes Yes Yes Yes Yes 4 Promotions - < 90 Days (Note 2) Yes No Yes No Yes No Yes No No 5 Lifeline/Link Up Services Yes Yes Yes Yes Yes Yes Yes Note 4 6 911/E911 Services Yes Yes Yes Yes Yes Yes Yes Yes

Threshold Billing Plan. The Parties agree that Al-Call CLEC-1 will incur the mechanized rate for all LSRs, both mechanized (LENS, EDI, EDI-PC, and TAG) and manual, if the percentage of mechanized LSRs to total LSRs meets or exceeds the threshold percentages shown below below: Year Ratio: Mechanized/Total LSRs 1999 70% 2000 80% 2001 90% The threshold plan will be discontinued in 2002. EXHIBIT A In calculating the percentages above, all orders submitted via BellSouth’s mechanized LSR systems (LENS, EDI, EDI-PC, and TAG) will count as mechanized LSRs, regardless of whether an order falls out of the mechanized process or requires manual intervention in order to be properly completed and processed. BellSouth will track the total LSR volume for each CLEC for each quarter. At the end of that time period, a Percent Electronic LSR calculation will be made for that quarter based on the LSR data tracked in the LCSC. If this percentage exceeds the threshold volume, all of that CLECs’ future manual LSRs will be billed at the mechanized LSR rate. To allow time for obtaining and analyzing the data and updating the billing system, this billing change will take place on the first day of the second month following the end of the quarter (e.g., e.g. May 1 for 1Q, Aug 1 for 2Q, etc.). There will be no adjustments to the amount billed for previously billed LSRs. The Parties agree that any charges BellSouth is unable to xxxx on April 15, 1999 will be trued up on or about July 1, 1999. Version2Q99:06/08/99 Attachment 2 EXCLUSIONS AND LIMITATIONS ON SERVICES AVAILABLE FOR RESALE Exhibit B Page 1 of 1 Type of Service AL FL GA KY LA Resale? Discount? Resale? Discount? Resale? Discount? Resale? Discount? Resale? Discount? 1 Grandfathered Services (Note 1) Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes 5 Lifeline/Link Up Services Yes Yes Yes Yes Yes Yes Note 4 Note 4 Yes Yes 6 911/E911 Services Yes Yes Yes Yes Yes Yes Yes Yes No No 8 AdWatchSM Svc (See Note 6) Yes yes Yes yes Yes yes Yes yes Yes Yes 10 Mobile Services Yes No Yes No Yes No Yes No Yes No 11 Federal Subscriber Line Charges Yes No Yes No Yes No Yes No Yes No 12 Non-Recurring Charges Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes 13 End User Line Charge – Number Portability Yes No Yes No Yes No Yes No Yes No Type of Service MS NC SC TN Resale? Discount? Resale? Discount? Resale? Discount? Resale? Discount? 1 Grandfathered Services (Note 1) Yes Yes Yes Yes Yes Yes Yes Yes 2 Contract Service Arrangements Yes Yes Yes Yes Yes Yes Yes Yes 4 Promotions - < 90 Days (Note 2) Yes No Yes No Yes No Yes No 5 Lifeline/Link Up Services Yes Yes Yes Yes Yes Yes Yes Note 4 6 911/E911 Services Yes Yes Yes Yes Yes Yes Yes Yes4

Threshold Billing Plan. The Parties agree that Al-Call Progressive will incur the mechanized rate for all LSRs, both mechanized (LENS, EDI, EDI-PC, and TAG) and manual, if the percentage of mechanized LSRs to total LSRs meets or exceeds the threshold percentages shown below below: Year Ratio: Mechanized/Total LSRs 1999 70% 2000 80% 2001 90% The threshold plan will be discontinued in 2002. EXHIBIT A In calculating the percentages above, all orders submitted via BellSouth’s mechanized LSR systems (LENS, EDI, EDI-PC, and TAG) will count as mechanized LSRs, regardless of whether an order falls out of the mechanized process or requires manual intervention in order to be properly completed and processed. BellSouth will track the total LSR volume for each CLEC for each quarter. At the end of that time period, a Percent Electronic LSR calculation will be made for that quarter based on the LSR data tracked in the LCSC. If this percentage exceeds the threshold volume, all of that CLECs’ future manual LSRs will be billed at the mechanized LSR rate. To allow time for obtaining and analyzing the data and updating the billing system, this billing change will take place on the first day of the second month following the end of the quarter (e.g., e.g. May 1 for 1Q, Aug 1 for 2Q, etc.). There will be no adjustments to the amount billed for previously billed LSRs. The Parties agree that any charges XxxxXxxxx is unable to bill on April 15, 1999 will be trued up on or about July 1, 1999. EXCLUSIONS AND LIMITATIONS ON SERVICES AVAILABLE FOR RESALE . Exhibit B Page 1 of 2 Type of Service AL FL GA KY LA Resale? Discount? Resale? Discount? Resale? Discount? Resale? Discount? Resale? Discount? 1 Grandfathered Services (Note 1) Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes 5 Lifeline/Link Up Services Yes Yes Yes Yes Yes Yes Note 4 Note 4 Yes Yes 6 911/E911 Services Yes Yes Yes Yes Yes Yes Yes Yes No No 7 N11 Services Yes Yes Yes Yes Yes Yes No No No No 8 AdWatchSM Svc (See Note 6) Yes yes No Yes yes No Yes yes No Yes yes No Yes Yes No 10 Mobile Services Yes No Yes No Yes No Yes No Yes No 11 Federal Subscriber Line Charges Yes No Yes No Yes No Yes No Yes No 12 Non-Recurring Charges Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes 13 End User Line Charge – Number Portability Yes No Yes No Yes No Yes No Yes No Type of Service MS NC SC TN Resale? Discount? Resale? Discount? Resale? Discount? Resale? Discount? 1 Grandfathered Services (Note 1) Yes Yes Yes Yes Yes Yes Yes Yes 2 Contract Service Arrangements Yes Yes Yes Yes Yes Yes Yes Yes 4 Promotions - < 90 Days (Note 2) Yes No Yes No Yes No Yes No No 5 Lifeline/Link Up Services Yes Yes Yes Yes Yes Yes Yes Note 4 6 911/E911 Services Yes Yes Yes Yes Yes Yes Yes Yes

Threshold Billing Plan. The Parties agree that Al-Call will incur the mechanized rate for all LSRs, both mechanized (LENS, EDI, EDI-PC, and TAG) and manual, if the percentage of mechanized LSRs to total LSRs meets or exceeds the threshold percentages shown below Year Ratio: Mechanized/Total LSRs 2000 80% 2001 90% The threshold plan will be discontinued in 2002. EXHIBIT A In calculating the percentages above, all orders submitted via BellSouth’s mechanized LSR systems (LENS, EDI, EDI-PC, and TAG) will count as mechanized LSRs, regardless of whether an order falls out of the mechanized process or requires manual intervention in order to be properly completed and processed. BellSouth will track the total LSR volume for each CLEC for each quarter. At the end of that time period, a Percent Electronic LSR calculation will be made for that quarter based on the LSR data tracked in the LCSC. If this percentage exceeds the threshold volume, all of that CLECs’ future manual LSRs will be billed at the mechanized LSR rate. To allow time for obtaining and analyzing the data and updating the billing system, this billing change will take place on the first day of the second month following the end of the quarter (e.g., May 1 for 1Q, Aug 1 for 2Q, etc.). There will be no adjustments to the amount billed for previously billed LSRs. EXCLUSIONS AND LIMITATIONS ON SERVICES AVAILABLE FOR RESALE Type of Service AL FL GA KY LA Resale? Discount? Resale? Discount? Resale? Discount? Resale? Discount? Resale? Discount? 1 Grandfathered Services (Note 1) Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes 5 Lifeline/Link Up Services Yes Yes Yes Yes Yes Yes Note 4 Note 4 Yes Yes 6 911/E911 Services Yes Yes Yes Yes Yes Yes Yes Yes No No 7 N11 Services Yes Yes Yes Yes Yes Yes No No No No 8 AdWatchSM Svc (See Note 6) Yes yes Yes yes Yes yes Yes yes Yes Yes 10 Mobile Services Yes No Yes No Yes No Yes No Yes No 11 Federal Subscriber Line Charges Yes No Yes No Yes No Yes No Yes No 12 Non-Recurring Charges Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes 13 End User Line Charge – Number Portability Yes No Yes No Yes No Yes No Yes No Type of Service MS NC SC TN Resale? Discount? Resale? Discount? Resale? Discount? Resale? Discount? 1 Grandfathered Services (Note 1) Yes Yes Yes Yes Yes Yes Yes Yes 2 Contract Service Arrangements Yes Yes Yes Yes Yes Yes Yes Yes 4 Promotions - < 90 Days (Note 2) Yes No Yes No Yes No Yes No 5 Lifeline/Link Up Services Yes Yes Yes Yes Yes Yes Yes Note 4 6 911/E911 Services Yes Yes Yes Yes Yes Yes Yes Yes4

Threshold Billing Plan. The Parties agree that Al-Call TEL3 will incur the mechanized rate for all LSRs, both mechanized (LENS, EDI, EDI-PC, and TAG) and manual, if the percentage of mechanized LSRs to total LSRs meets or exceeds the threshold percentages shown below below: Year Ratio: Mechanized/Total LSRs 1999 70% 2000 80% 2001 90% The threshold plan will be discontinued in 2002. EXHIBIT A In calculating the percentages above, all orders submitted via BellSouth’s mechanized LSR systems (LENS, EDI, EDI-PC, and TAG) will count as mechanized LSRs, regardless of whether an order falls out of the mechanized process or requires manual intervention in order to be properly completed and processed. BellSouth will track the total LSR volume for each CLEC for each quarter. At the end of that time period, a Percent Electronic LSR calculation will be made for that quarter based on the LSR data tracked in the LCSC. If this percentage exceeds the threshold volume, all of that CLECs’ future manual LSRs will be billed at the mechanized LSR rate. To allow time for obtaining and analyzing the data and updating the billing system, this billing change will take place on the first day of the second month following the end of the quarter (e.g., e.g. May 1 for 1Q, Aug 1 for 2Q, etc.). There will be no adjustments to the amount billed for previously billed LSRs. The Parties agree that any charges XxxxXxxxx is unable to bill on April 15, 1999 will be trued up on or about July 1, 1999. EXCLUSIONS AND LIMITATIONS ON SERVICES AVAILABLE FOR RESALE . Exhibit B Page 1 of 2 Type of Service AL FL GA KY LA Resale? Discount? Resale? Discount? Resale? Discount? Resale? Discount? Resale? Discount? 1 Grandfathered Services (Note 1) Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes 5 Lifeline/Link Up Services Yes Yes Yes Yes Yes Yes Note 4 Note 4 Yes Yes 6 911/E911 Services Yes Yes Yes Yes Yes Yes Yes Yes No No 7 N11 Services Yes Yes Yes Yes Yes Yes No No No No 8 AdWatchSM Svc (See Note 6) Yes yes No Yes yes No Yes yes No Yes yes No Yes Yes No 10 Mobile Services Yes No Yes No Yes No Yes No Yes No 11 Federal Subscriber Line Charges Yes No Yes No Yes No Yes No Yes No 12 Non-Recurring Charges Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes 13 End User Line Charge – Number Portability Yes No Yes No Yes No Yes No Yes No Type of Service MS NC SC TN Resale? Discount? Resale? Discount? Resale? Discount? Resale? Discount? 1 Grandfathered Services (Note 1) Yes Yes Yes Yes Yes Yes Yes Yes 2 Contract Service Arrangements Yes Yes Yes Yes Yes Yes Yes Yes 4 Promotions - < 90 Days (Note 2) Yes No Yes No Yes No Yes No No 5 Lifeline/Link Up Services Yes Yes Yes Yes Yes Yes Yes Note 4 6 911/E911 Services Yes Yes Yes Yes Yes Yes Yes Yes

Threshold Billing Plan. The Parties agree that AlZ-Call Tel will incur the mechanized rate for all LSRs, both mechanized (LENS, EDI, EDI-PC, and TAG) and manual, if the percentage of mechanized LSRs to total LSRs meets or exceeds the threshold percentages shown below below: Year Ratio: Mechanized/Total LSRs 2000 80% 2001 90% The threshold plan will be discontinued in 2002. EXHIBIT A In calculating the percentages above, all orders submitted via BellSouth’s mechanized LSR systems (LENS, EDI, EDI-PC, and TAG) will count as mechanized LSRs, regardless of whether an order falls out of the mechanized process or requires manual intervention in order to be properly completed and processed. BellSouth will track the total LSR volume for each CLEC for each quarter. At the end of that time period, a Percent Electronic LSR calculation will be made for that quarter based on the LSR data tracked in the LCSC. If this percentage exceeds the threshold volume, all of that CLECs’ future manual LSRs will be billed at the mechanized LSR rate. To allow time for obtaining and analyzing the data and updating the billing system, this billing change will take place on the first day of the second month following the end of the quarter (e.g., e.g. May 1 for 1Q, Aug 1 for 2Q, etc.). There will be no adjustments to the amount billed for previously billed LSRs. EXCLUSIONS AND LIMITATIONS ON SERVICES AVAILABLE FOR RESALE Type of Service AL FL GA KY LA Resale? Discount? Resale? Discount? Resale? Discount? Resale? Discount? Resale? Discount? MS NC SC TN Resale Discount Resale Discount Resale Discount Resale Discount Resale Discount Resale Discount Resale Discount Resale Discount Resale Discount 1 Grandfathered Services (Note 1) Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes 6 911/E911 Services Yes Yes Yes Yes Yes Yes Yes Yes No No 8 AdWatchSM Svc (See 5 Lifeline/Link Up Services Yes Yes Yes Yes Yes Yes Note 6) 4 Note 4 Yes yes Yes yes Yes yes Yes yes Yes Yes Yes Yes Yes Yes 10 Mobile Services Yes No Yes No Yes No Yes No Yes No Yes No Yes No Yes No Yes No 11 Federal Subscriber Line Charges Yes No Yes No Yes No Yes No Yes No Yes No Yes No Yes No Yes No 12 Non-Recurring Charges Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes No 13 End User Line Charge – Number Portability Yes No Yes No Yes No Yes No Yes No Type of Yes No Yes No Yes No Yes No 14 Public Telephone Access Service MS NC SC TN Resale? Discount? Resale? Discount? Resale? Discount? Resale? Discount? 1 Grandfathered Services (Note 1PTAS) Yes Yes Yes Yes Yes Yes Yes Yes 2 Contract Service Arrangements Yes Yes Yes Yes Yes Yes Yes Yes 4 Promotions - < 90 Days (Note 2) Yes No Yes No Yes No Yes No 5 Lifeline/Link Up Services Yes Yes Yes Yes Yes Yes Yes Note 4 6 911/E911 Services Yes Yes Yes Yes Yes Yes Yes YesApplicable Notes:

Threshold Billing Plan. The Parties agree that Al-Call BroadRiver will incur the mechanized rate for all LSRs, both mechanized (LENS, EDI, EDI-EDI- PC, and TAG) and manual, if the percentage of mechanized LSRs to total LSRs meets or exceeds the threshold percentages shown below Year Ratio: Mechanized/Total LSRs 2000 80% 2001 90% The threshold plan will be discontinued in 2002. EXHIBIT A In calculating the percentages above, all orders submitted via BellSouth’s mechanized LSR systems (LENS, EDI, EDI-PC, and TAG) will count as mechanized LSRs, regardless of whether an order falls out of the mechanized process or requires manual intervention in order to be properly completed and processed. BellSouth will track the total LSR volume for each CLEC for each quarter. At the end of that time period, a Percent Electronic LSR calculation will be made for that quarter based on the LSR data tracked in the LCSC. If this percentage exceeds the threshold volume, all of that CLECs’ future manual LSRs will be billed at the mechanized LSR rate. To allow time for obtaining and analyzing the data and updating the billing system, this billing change will take place on the first day of the second month following the end of the quarter (e.g., May 1 for 1Q, Aug 1 for 2Q, etc.). There will be no adjustments to the amount billed for previously billed LSRs. EXCLUSIONS AND LIMITATIONS ON SERVICES AVAILABLE FOR RESALE Type of Service AL FL GA KY LA Resale? Discount? Resale? Discount? Resale? Discount? Resale? Discount? Resale? Discount? 1 Grandfathered Services (Note 1) Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes 6 911/E911 Services Yes Yes Yes Yes Yes Yes Yes Yes No No 8 AdWatchSM Svc (See Note 6) Yes yes Yes yes Yes yes Yes yes Yes Yes 10 Mobile Services Yes No Yes No Yes No Yes No Yes No 11 Federal Subscriber Line Charges Yes No Yes No Yes No Yes No Yes No 12 Non-Recurring Charges Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes 13 End User Line Charge – Number Portability Yes No Yes No Yes No Yes No Yes No Type of Service MS NC SC TN Resale? Discount? Resale? Discount? Resale? Discount? Resale? Discount? 1 Grandfathered Services (Note 1) Yes Yes Yes Yes Yes Yes Yes Yes 2 Contract Service Arrangements Yes Yes Yes Yes Yes Yes Yes Yes 4 Promotions - < 90 Days (Note 2) Yes No Yes No Yes No Yes No 5 Lifeline/Link Up Services Yes Yes Yes Yes Yes Yes Yes Note 4 6 911/E911 Services Yes Yes Yes Yes Yes Yes Yes Yes

Threshold Billing Plan. The Parties agree that Al-Call NewSouth will incur the mechanized rate for all LSRs, both mechanized (LENS, EDI, EDI-PC, and TAG) and manual, if the percentage of mechanized LSRs to total LSRs meets or exceeds the threshold percentages shown below below: Year Ratio: Mechanized/Total LSRs 1999 70% 2000 80% 2001 90% The threshold plan will be discontinued in 2002. EXHIBIT A In calculating the percentages above, all orders submitted via BellSouth’s mechanized LSR systems (LENS, EDI, EDI-PC, and TAG) will count as mechanized LSRs, regardless of whether an order falls out of the mechanized process or requires manual intervention in order to be properly completed and processed. BellSouth will track the total LSR volume for each CLEC for each quarter. At the end of that time period, a Percent Electronic LSR calculation will be made for that quarter based on the LSR data tracked in the LCSC. If this percentage exceeds the threshold volume, all of that CLECs’ future manual LSRs will be billed at the mechanized LSR rate. To allow time for obtaining and analyzing the data and updating the billing system, this billing change will take place on the first day of the second month following the end of the quarter (e.g., e.g. May 1 for 1Q, Aug 1 for 2Q, etc.). There will be no adjustments to the amount billed for previously billed LSRs. The Parties agree that any charges XxxxXxxxx is unable to bill on April 15, 1999 will be trued up on or about July 1, 1999. EXCLUSIONS AND LIMITATIONS ON SERVICES AVAILABLE FOR RESALE . Exhibit B Page 1 of 2 Type of Service AL FL GA KY LA Resale? Discount? Resale? Discount? Resale? Discount? Resale? Discount? Resale? Discount? 1 Grandfathered Services (Note 1) Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes 5 Lifeline/Link Up Services Yes Yes Yes Yes Yes Yes Note 4 Note 4 Yes Yes 6 911/E911 Services Yes Yes Yes Yes Yes Yes Yes Yes No No 7 N11 Services Yes Yes Yes Yes Yes Yes No No No No 8 AdWatchSM Svc (See Note 6) Yes yes No Yes yes No Yes yes No Yes yes No Yes Yes No 10 Mobile Services Yes No Yes No Yes No Yes No Yes No 11 Federal Subscriber Line Charges Yes No Yes No Yes No Yes No Yes No 12 Non-Recurring Charges Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes 13 End User Line Charge – Number Portability Yes No Yes No Yes No Yes No Yes No Type of Service MS NC SC TN Resale? Discount? Resale? Discount? Resale? Discount? Resale? Discount? 1 Grandfathered Services (Note 1) Yes Yes Yes Yes Yes Yes Yes Yes 2 Contract Service Arrangements Yes Yes Yes Yes Yes Yes Yes Yes 4 Promotions - < 90 Days (Note 2) Yes No Yes No Yes No Yes No No 5 Lifeline/Link Up Services Yes Yes Yes Yes Yes Yes Yes Note 4 6 911/E911 Services Yes Yes Yes Yes Yes Yes Yes Yes