Common use of Establishment of Service Clause in Contracts

Establishment of Service. 7.1 After receiving certification as a Local Exchange Company from the appropriate regulatory agency, unless it has already done so, Teligent will provide the appropriate BellSouth service center the necessary documentation to enable BellSouth to establish a master account for Teligent’s resold services. Such documentation shall include the Application for Master Account, proof of authority to provide telecommunications services, an Operating Company Number ("OCN") assigned by the National Exchange Carriers Association ("NECA") and a tax exemption certificate, if applicable. When necessary deposit requirements are met, BellSouth will begin taking orders for the resale of service. 7.2 Service orders will be in a standard format designated by BellSouth. All Local Service Requests (“LSRs”) submitted for products and services under this Attachment will be subject to the OSS charges set forth in the General Terms and Conditions of this Agreement. 7.3 When notification is received from Teligent that a current End User of BellSouth will subscribe to Teligent’s service, standard service order intervals for the appropriate class of service will apply. 7.4 BellSouth will not require End User confirmation prior to establishing service for Teligent’s End User customer. Teligent must, however, be able to demonstrate End User authorization upon request. 7.5 Teligent will be the single point of contact with BellSouth for all subsequent ordering activity resulting in additions or changes to resold services except that BellSouth will accept a request directly from the End User for conversion of the End User's service from Teligent to BellSouth or will accept a request from another CLEC for conversion of the End User's service from Teligent to the other LEC. BellSouth will notify Teligent within five (5) business days via US mail that such a request has been processed. 7.6 If BellSouth determines that an unauthorized change in local service to Teligent has occurred, BellSouth will reestablish service with the appropriate local service provider and will assess Teligent as the CLEC initiating the unauthorized change, the unauthorized change charge described in BellSouth FCC. Tariff No. 1, Section 13 or applicable state tariff. Appropriate nonrecurring charges, as set forth in Section A4 of the General Subscriber Service Tariff, will also be assessed to Teligent. These charges will be refunded if Teligent provides satisfactory proof of authorization. 7.7 BellSouth reserves the right to secure a deposit not to exceed two (2) estimated months billing. Any such security deposit may be held during the continuance of the service as security for the payment of any and all amounts accruing for the service. 7.7.1 The fact that a security deposit has been made in no way relieves from complying with BellSouth’s regulations as to advance payments and the prompt payment of bills on presentation nor does it constitute a waiver or modification of the regular practices of BellSouth providing for the discontinuance of service for non-payment of any sums due BellSouth. 7.7.2 BellSouth reserves the right to increase the security deposit requirements when, in its sole judgment, circumstances so warrant and gross monthly billing has increased beyond the level initially used to determine the security deposit. 7.7.3 In the event that Teligent defaults on its account, service to Teligent will be terminated and any security deposits held will be applied to its account. 7.7.4 Interest on a security deposit shall accrue and be paid in accordance with the terms in the appropriate BellSouth tariff. 7.8 Orders to switch services “as is” shall be treated as a change of service and shall

Establishment of Service. 7.1 6.1 After receiving certification as a Local Exchange Company local exchange company from the appropriate regulatory agency, unless it has already done so, Teligent Citizen Phone will provide the appropriate BellSouth service center the necessary documentation to enable BellSouth to establish a master account for TeligentCitizen Phone’s resold services. Such documentation shall include the Application for Master Account, proof of authority to provide telecommunications services, an Operating Company Number ("OCN") assigned by the National Exchange Carriers Association ("NECA") and a tax exemption certificate, if applicable. When necessary deposit requirements are met, as described in Section 6.6 below, BellSouth will begin taking orders for the resale of service. 7.2 6.2 Service orders will be in a standard format designated by BellSouth. All Local Service Requests (“LSRs”) submitted for products and services under this Attachment will be subject to the OSS charges set forth in the General Terms and Conditions of this Agreement. 7.3 When notification is received from Teligent 6.3 Citizen Phone shall provide to BellSouth a blanket letter of authorization ("LOA") certifying that a current Citizen Phone will have End User of BellSouth will subscribe authorization prior to Teligent’s viewing the End User's customer service record or switching the End User's service, standard service order intervals for the appropriate class of service will apply. 7.4 . BellSouth will not require End User confirmation prior to establishing service for TeligentCitizen Phone’s End User customer. Teligent Citizen Phone must, however, be able to demonstrate End User authorization upon request. 7.5 Teligent will be the single point of contact with BellSouth for all subsequent ordering activity resulting in additions or changes to resold services except that 6.4 BellSouth will accept a request directly from the End User for conversion of the End User's service from Teligent Citizen Phone to BellSouth or will accept a request from another CLEC for conversion of the End User's service from Teligent Citizen Phone to such other CLEC. Upon completion of the other LEC. conversion BellSouth will notify Teligent within five (5) business days via US mail Citizen Phone that such a request conversion has been processedcompleted. 7.6 6.5 If BellSouth determines is informed that an unauthorized change in local service to Teligent Citizen Phone has occurred, BellSouth will reestablish service with the appropriate local service provider and will assess Teligent Citizen Phone as the CLEC initiating the alleged unauthorized change, the unauthorized change charge described in BellSouth FCC. FCC Tariff No. 1, Section 13 or applicable state tariff. Appropriate nonrecurring charges, as set forth in Section A4 of the General Subscriber Service Tariff, will also be assessed to TeligentCitizen Phone. These charges In accordance with FCC Slamming Liability Rules, the relevant governmental agency will determine if an unauthorized change has occurred. Resolution of all relevant issues shall be refunded if Teligent provides satisfactory proof of authorizationhandled directly with the authorized CLEC and Citizen Phone. 7.7 6.6 BellSouth reserves the right to secure the account with a suitable form of security deposit, unless satisfactory credit has already been established. 6.6.1 Such security deposit not shall take the form of cash for cash equivalent, an irrevocable Letter of Credit or other forms of security acceptable to exceed two (2) estimated months billingBellSouth. Any such security deposit may be held during the continuance of the service as security for the payment of any and all amounts accruing for the service. 7.7.1 6.6.2 If a security deposit is required, such security deposit shall be made prior to the inauguration of service. 6.6.3 Such security deposit shall be two months' estimated billing. 6.6.4 The fact that a security deposit has been made in no way relieves Citizen Phone from complying with BellSouth’s 's regulations as to advance payments and the prompt payment of bills on presentation nor does it constitute a waiver or modification of the regular practices of BellSouth providing for the discontinuance of service for non-payment of any sums due BellSouth. 7.7.2 6.6.5 BellSouth reserves the right to increase the security deposit requirements when, in its sole reasonable judgment, circumstances changes in Citizen Phone's financial status so warrant and and/or gross monthly billing has increased beyond the level initially used to determine the security deposit. 7.7.3 6.6.6 In the event that Teligent defaults service to Citizen Phone is terminated due to Citizen Phone's default on its account, service to Teligent will be terminated and any security deposits held will be applied to its Citizen Phone's account. 7.7.4 6.6.7 Interest on a cash or cash equivalent security deposit shall accrue and be paid in accordance with the terms in the appropriate BellSouth tariff. 7.8 Orders to switch services “as is” shall be treated as a change of service and shall

Establishment of Service. 7.1 A. After receiving certification as a Local Exchange Company local exchange company from the appropriate regulatory agency, unless it has already done so, Teligent CNS will provide the appropriate BellSouth Company service center the necessary documentation to enable BellSouth the Company to establish a master account for Teligent’s resold servicesCNS. Such documentation shall include the Application for Master Account, proof of authority to provide telecommunications services, an Operating Company Number ("OCN") assigned by the National Exchange Carriers Association ("NECA") and a tax exemption certificate, if applicable. When necessary deposit requirements are met, BellSouth the Company will begin taking orders for the resale of service. 7.2 B. Service orders will be in a standard format designated by BellSouth. All Local Service Requests (“LSRs”) submitted for products and services under this Attachment will be subject to the OSS charges set forth in the General Terms and Conditions of this AgreementCompany. 7.3 C. When notification is received from Teligent CNS that a current End User customer of BellSouth the Company will subscribe to TeligentCNS’s service, standard service order intervals for the appropriate class of service will apply. 7.4 BellSouth D. The Company will not require End User end user confirmation prior to establishing service for TeligentCNS’s End User end user customer. Teligent CNS must, however, be able to demonstrate End User end user authorization upon request. 7.5 Teligent E. CNS will be the single point of contact with BellSouth the Company for all subsequent ordering activity resulting in additions or changes to resold services except that BellSouth the Company will accept a request directly from the End User end user for conversion of the End Userend user's service from Teligent CNS to BellSouth the Company or will accept a request from another CLEC OLEC for conversion of the End Userend user's service from Teligent CNS to the other LEC. BellSouth The Company will notify Teligent within five (5) business days via US mail CNS that such a request has been processed. 7.6 F. If BellSouth the Company determines that an unauthorized change in local service to Teligent CNS has occurred, BellSouth the Company will reestablish service with the appropriate local service provider and will assess Teligent CNS as the CLEC OLEC initiating the unauthorized change, the unauthorized change charge described in BellSouth FCC. F.C.C. Tariff No. 1, Section 13 or applicable state tariff13. Appropriate nonrecurring charges, as set forth in Section A4 A4. of the General Subscriber Service Tariff, will also be assessed to TeligentCNS. These charges will can be refunded adjusted if Teligent CNS provides satisfactory proof of authorization. 7.7 BellSouth G. In order to safeguard its interest, the Company reserves the right to secure the account with a suitable form of security deposit, unless satisfactory credit has already been established. 1. Such security deposit not shall take the form of an irrevocable Letter of Credit or other forms of security acceptable to exceed two (2) estimated months billingthe Company. Any such security deposit may be held during the continuance of the service as security for the payment of any and all amounts accruing for the service. 7.7.1 2. If a security deposit is required, such security deposit shall be made prior to the inauguration of service. 3. Such security deposit may not exceed two months’ estimated billing. 4. The fact that a security deposit has been made in no way relieves CNS from complying with BellSouththe Company’s regulations as to advance payments and the prompt payment of bills on presentation nor does it constitute a waiver or modification of the regular practices of BellSouth the Company providing for the discontinuance of service for non-payment of any sums due BellSouththe Company. 7.7.2 BellSouth 5. The Company reserves the right to increase the security deposit requirements when, in its sole judgment, circumstances so warrant and and/or gross monthly billing has increased beyond the level initially used to determine the security deposit. 7.7.3 6. In the event that Teligent CNS defaults on its account, service to Teligent CNS will be terminated and any security 7. In the case of a cash deposit, interest at a rate as set forth in the appropriate BellSouth tariff shall be paid to CNS during the continuance of the security deposits held will be applied to its account. 7.7.4 deposit. Interest on a security deposit shall accrue and be paid in accordance with the terms in the appropriate BellSouth tariff. 7.8 Orders to switch services “as is” annually and, if requested, shall be treated as a change of service and shallannually credited to CNS by the accrual date.

Establishment of Service. 7.1 6.1 After receiving certification as a Local Exchange Company local exchange company from the appropriate regulatory agency, unless it has already done so, Teligent Progressive will provide the appropriate BellSouth service center the necessary documentation to enable BellSouth to establish a master account for TeligentProgressive’s resold services. Such documentation shall include the Application for Master Account, proof of authority to provide telecommunications services, an Operating Company Number ("OCN") assigned by the National Exchange Carriers Association ("NECA") and a tax exemption certificate, if applicable. When necessary deposit requirements are met, BellSouth will begin taking orders for the resale of service. 7.2 6.2 Service orders will be in a standard format designated by BellSouth. All Local Service Requests (“LSRs”) submitted for products and services under this Attachment will be subject to the OSS charges set forth in the General Terms and Conditions of this Agreement. 7.3 6.3 When notification is received from Teligent Progressive that a current End User end user of BellSouth will subscribe to TeligentProgressive’s service, standard service order intervals for the appropriate class of service will apply. 7.4 6.4 BellSouth will not require End User end user confirmation prior to establishing service for TeligentProgressive’s End User end user customer. Teligent Progressive must, however, be able to demonstrate End User end user authorization upon request. 7.5 Teligent 6.5 Progressive will be the single point of contact with BellSouth for all subsequent ordering activity resulting in additions or changes to resold services except that BellSouth will accept a request directly from the End User end user for conversion of the End Userend user's service from Teligent Progressive to BellSouth or will accept a request from another CLEC for conversion of the End Userend user's service from Teligent Progressive to the other LEC. BellSouth will notify Teligent within five (5) business days via US mail Progressive that such a request has been processed. 7.6 6.6 If BellSouth determines that an unauthorized change in local service to Teligent Progressive has occurred, BellSouth will reestablish service with the appropriate local service provider and will assess Teligent Progressive as the CLEC initiating the unauthorized change, the unauthorized change charge described in BellSouth FCC. F.C.C. Tariff No. 1, Section 13 or applicable state tariff. Appropriate nonrecurring charges, as set forth in Section A4 A4. of the General Subscriber Service Tariff, will also be assessed to TeligentProgressive. These charges will can be refunded adjusted if Teligent Progressive provides satisfactory proof of authorization. 7.7 6.7 In order to safeguard its interest, BellSouth reserves the right to secure the account with a suitable form of security deposit, unless satisfactory credit has already been established. 6.7.1 Such security deposit not shall take the form of an irrevocable Letter of Credit or other forms of security acceptable to exceed two (2) estimated months billingBellSouth. Any such security deposit may be held during the continuance of the service as security for the payment of any and all amounts accruing for the service. 7.7.1 6.7.2 If a security deposit is required, such security deposit shall be made prior to the inauguration of service. 6.7.3 Such security deposit may not exceed two months’ estimated billing. 6.7.4 The fact that a security deposit has been made in no way relieves Progressive from complying with BellSouth’s regulations as to advance payments and the prompt payment of bills on presentation nor does it constitute a waiver or modification of the regular practices of BellSouth providing for the discontinuance of service for non-payment of any sums due BellSouth. 7.7.2 6.7.5 BellSouth reserves the right to increase the security deposit requirements when, in its sole judgment, circumstances so warrant and and/or gross monthly billing has increased beyond the level initially used to determine the security deposit. 7.7.3 6.7.6 In the event that Teligent Progressive defaults on its account, service to Teligent Progressive will be terminated and any security deposits held will be applied to its account. 7.7.4 6.7.7 Interest on a security deposit shall accrue and be paid in accordance with the terms in the appropriate BellSouth tariff. 7.8 Orders to switch services “as is” shall be treated as a change of service and shall

Establishment of Service. 7.1 6.1 After receiving certification as a Local Exchange Company local exchange company from the appropriate regulatory agency, unless it has already done so, Teligent Pathnet will provide the appropriate BellSouth service center the necessary documentation to enable BellSouth to establish a master account for TeligentPathnet’s resold services. Such documentation shall include the Application for Master Account, proof of authority to provide telecommunications services, an Operating Company Number ("OCN") assigned by the National Exchange Carriers Association ("NECA") and a tax exemption certificate, if applicable. When necessary deposit requirements are met, BellSouth will begin taking orders for the resale of service. 7.2 6.2 Service orders will be in a standard format designated by BellSouth. All Local Service Requests (“LSRs”) submitted for products and services under this Attachment will be subject to the OSS charges set forth in the General Terms and Conditions of this Agreement. 7.3 6.3 When notification is received from Teligent Pathnet that a current End User end user of BellSouth will subscribe to TeligentPathnet’s service, standard service order intervals for the appropriate class of service will apply. 7.4 6.4 BellSouth will not require End User end user confirmation prior to establishing service for TeligentPathnet’s End User end user customer. Teligent Pathnet must, however, be able to demonstrate End User end user authorization upon request. 7.5 Teligent 6.5 Pathnet will be the single point of contact with BellSouth for all subsequent ordering activity resulting in additions or changes to resold services except that BellSouth will accept a request directly from the End User end user for conversion of the End Userend user's service from Teligent Pathnet to BellSouth or will accept a request from another CLEC for conversion of the End Userend user's service from Teligent Pathnet to the other LEC. BellSouth will notify Teligent within five (5) business days via US mail Pathnet that such a request has been processed. 7.6 6.6 If BellSouth determines that an unauthorized change in local service to Teligent Pathnet has occurred, BellSouth will reestablish service with the appropriate local service provider and will assess Teligent Pathnet as the CLEC initiating the unauthorized change, the unauthorized change charge described in BellSouth FCC. F.C.C. Tariff No. 1, Section 13 or applicable state tariff. Appropriate nonrecurring charges, as set forth in Section A4 of the General Subscriber Service Tariff, will also be assessed to TeligentPathnet. These charges will shall be refunded eliminated from ▇▇▇▇’▇ ▇▇▇▇ if Teligent Pathnet provides satisfactory proof of authorization. 7.7 6.7 In order to safeguard its interest, BellSouth reserves the right to secure the account with a suitable form of security deposit, unless satisfactory credit has already been established. 6.7.1 Such security deposit not shall take the form of an irrevocable Letter of Credit or other forms of security acceptable to exceed two (2) estimated months billingBellSouth. Any such security deposit may be held during the continuance of the service as security for the payment of any and all amounts accruing for the service, until the credit worthiness, as determined by BellSouth, of Pathnet is established and at that time the security deposit will be returned with interest. 7.7.1 6.7.2 If a security deposit is required, such security deposit shall be made prior to the inauguration of service. 6.7.3 Such security deposit may not exceed two months' estimated billing. 6.7.4 The fact that a security deposit has been made in no way relieves Pathnet from complying with BellSouth’s 's regulations as to advance payments and the prompt payment of bills on presentation nor does it constitute a waiver or modification of the regular practices of BellSouth providing for the discontinuance of service for non-non- payment of any sums due BellSouth. 7.7.2 6.7.5 BellSouth reserves the right to increase the security deposit requirements as long as the process is consistent with that process implementation of all other carriers and CLECs when, in its sole judgment, circumstances so warrant and and/or gross monthly billing has increased beyond the level initially used to determine the security deposit. 7.7.3 6.7.6 In the event that Teligent Pathnet defaults on its account, service to Teligent Pathnet will be terminated and any security deposits held will be applied to its account. 7.7.4 6.7.7 Interest on a security deposit shall accrue and be paid in accordance with the terms in the appropriate BellSouth tariff. 7.8 Orders to switch services “as is” shall be treated as a change of service and shall

Establishment of Service. 7.1 6.1 After receiving certification as a Local Exchange Company local exchange company from the appropriate regulatory agency, unless it has already done so, Teligent SouthEast will provide the appropriate BellSouth AT&T service center the necessary documentation to enable BellSouth AT&T to establish a master account for TeligentSouthEast’s resold services. Such documentation shall include the Application for Master Account, proof of authority to provide telecommunications services, an Operating Company Number ("OCN") assigned by the National Exchange Carriers Association ("NECA") and a tax exemption certificate, if applicable. When necessary deposit requirements are met, BellSouth as described in Section 6.6 below, AT&T will begin taking orders for the resale of service. 7.2 . Service orders will be in a standard format designated by BellSouth. All Local Service Requests AT&T. 6.2 SouthEast shall provide to AT&T a blanket letter of authorization (“LSRs”"LOA") submitted for products and services under this Attachment certifying that SouthEast will be subject to the OSS charges set forth in the General Terms and Conditions of this Agreement. 7.3 When notification is received from Teligent that a current have End User of BellSouth will subscribe authorization prior to Teligent’s viewing the End User's customer service record or switching the End User's service, standard service order intervals for the appropriate class of service will apply. 7.4 BellSouth . AT&T will not require End User confirmation prior to establishing service for TeligentSouthEast’s End User customer. Teligent SouthEast must, however, be able to demonstrate End User authorization upon request. 7.5 Teligent will be the single point of contact with BellSouth for all subsequent ordering activity resulting in additions or changes to resold services except that BellSouth 6.3 AT&T will accept a request directly from the End User for conversion of the End User's service from Teligent SouthEast to BellSouth AT&T or will accept a request from another CLEC for conversion of the End User's service from Teligent SouthEast to such other CLEC. Upon completion of the other LEC. BellSouth conversion AT&T will notify Teligent within five (5) business days via US mail SouthEast that such a request conversion has been processedcompleted. 7.6 6.4 If BellSouth AT&T determines that an unauthorized change in local service to Teligent SouthEast has occurred, BellSouth AT&T will reestablish service with the appropriate local service provider and will assess Teligent SouthEast as the CLEC initiating the unauthorized change, the unauthorized change charge described in BellSouth FCC. FCC Tariff No. 1, Section 13 or applicable state tariff. Appropriate nonrecurring charges, as set forth in Section A4 of the General Subscriber Service Tariff, will also be assessed to TeligentSouthEast. These charges will can be refunded adjusted if Teligent SouthEast provides satisfactory proof of authorization. 7.7 BellSouth . 6.5 AT&T reserves the right to secure the account with a suitable form of security deposit, unless satisfactory credit has already been established. 6.6.1 Such security deposit not shall take the form of cash for cash equivalent, an irrevocable Letter of Credit or other forms of security acceptable to exceed two (2) estimated months billing. AT&T. Any such security deposit may be held during the continuance of the service as security for the payment of any and all amounts accruing for the service. 7.7.1 6.6.2 If a security deposit is required, such security deposit shall be made prior to the inauguration of service. 6.6.3 Such security deposit shall be two months' estimated billing. 6.6.4 The fact that a security deposit has been made in no way relieves SouthEast from complying with BellSouth’s AT&T's regulations as to advance payments and the prompt payment of bills on presentation nor does it constitute a waiver or modification of the regular practices of BellSouth AT&T providing for the discontinuance of service for non-payment of any sums due BellSouth.AT&T. 7.7.2 BellSouth 6.6.5 AT&T reserves the right to increase the security deposit requirements after a thirty (30) day notice, when, in its sole reasonable judgment, circumstances changes in SouthEast's financial status so warrant and and/or gross monthly billing has increased beyond the level initially used to determine the security deposit. 7.7.3 In the event that Teligent defaults on its account, service to Teligent will be terminated and any security deposits held will be applied to its account. 7.7.4 Interest on a security deposit shall accrue and be paid in accordance with the terms in the appropriate BellSouth tariff. 7.8 Orders to switch services “as is” shall be treated as a change of service and shall

Establishment of Service. 7.1 6.1 After receiving certification as a Local Exchange Company local exchange company from the appropriate regulatory agency, unless it has already done so, Teligent OptiLink will provide the appropriate BellSouth Company service center the necessary documentation to enable BellSouth to establish a master account for Teligent’s resold servicesOptiLink. Such documentation shall include the Application for Master Account, proof of authority to provide telecommunications services, an Operating Company Number ("OCN") assigned by the National Exchange Carriers Association ("NECA") and a tax exemption certificate, if applicable. When necessary deposit requirements are met, BellSouth will begin taking orders for the resale of service. 7.2 6.2 Service orders will be in a standard format designated by BellSouth. All Local Service Requests (“LSRs”) submitted for products and services under this Attachment will be subject to the OSS charges set forth in the General Terms and Conditions of this Agreement. 7.3 6.3 When notification is received from Teligent OptiLink that a current End User customer of BellSouth will subscribe to TeligentOptiLink’s service, standard service order intervals for the appropriate class of service will apply. 7.4 6.4 BellSouth will not require End User end user confirmation prior to establishing service for TeligentOptiLink’s End User end user customer. Teligent OptiLink must, however, be able to demonstrate End User end user authorization upon request. 7.5 Teligent 6.5 OptiLink will be the single point of contact with BellSouth for all subsequent ordering activity resulting in additions or changes to resold services except that BellSouth will accept a request directly from the End User end user for conversion of the End Userend user's service from Teligent OptiLink to BellSouth or will accept a request from another CLEC for conversion of the End Userend user's service from Teligent OptiLink to the other LEC. BellSouth will notify Teligent within five (5) business days via US mail OptiLink that such a request has been processed. 7.6 6.6 If BellSouth determines that an unauthorized change in local service to Teligent OptiLink has occurred, BellSouth will reestablish service with the appropriate local service provider and will assess Teligent OptiLink as the CLEC initiating the unauthorized change, the unauthorized change charge described in BellSouth FCC. FCC Tariff No. 1, Section 13 or applicable state tariff. Appropriate nonrecurring charges, as set forth in Section A4 A4. of the General Subscriber Service Tariff, will also be assessed to TeligentOptiLink. These charges will can be refunded adjusted if Teligent OptiLink provides satisfactory proof of authorization. 7.7 6.7 In order to safeguard its interest, BellSouth reserves the right to secure the account with a suitable form of security deposit, unless satisfactory credit has already been established. 6.7.1 Such security deposit not shall take the form of an irrevocable Letter of Credit or other forms of security acceptable to exceed two (2) estimated months billingBellSouth. Any such security deposit may be held during the continuance of the service as security for the payment of any and all amounts accruing for the service. 7.7.1 6.7.2 If a security deposit is required, such security deposit shall be made prior to the inauguration of service. 6.7.3 Such security deposit may not exceed two months' estimated billing. 6.7.4 The fact that a security deposit has been made in no way relieves OptiLink from complying with BellSouth’s 's regulations as to advance payments and the prompt payment of bills on presentation nor does it constitute a waiver or modification of the regular practices of BellSouth providing for the discontinuance of service for non-payment of any sums due BellSouth. 7.7.2 6.7.5 BellSouth reserves the right to increase the security deposit requirements when, in its sole judgment, circumstances so warrant and and/or gross monthly billing has increased beyond the level initially used to determine the security deposit. 7.7.3 6.7.6 In the event that Teligent OptiLink defaults on its account, service to Teligent OptiLink will be terminated and any security deposits held will be applied to its account. 7.7.4 6.7.7 Interest on a security deposit shall accrue and be paid in accordance with the terms in the appropriate BellSouth tariff. 7.8 Orders to switch services “as is” shall be treated as a change of service and shall

Establishment of Service. 7.1 6.1 After receiving certification as a Local Exchange Company local exchange company from the appropriate regulatory agency, unless it has already done so, Teligent SprintSprint CLEC will provide the appropriate BellSouth AT&T service center the necessary documentation to enable BellSouth AT&T to establish a master account for Teligent’s resold services. Such documentation shall include the Application for Master Account, proof of authority to provide telecommunications services, an Operating Company Number ("OCN") assigned by the National Exchange Carriers Association ("NECA") and a tax exemption certificate, if applicable. When necessary deposit requirements are met, BellSouth AT&T will begin taking orders for the resale of service. The Parties acknowledge that SprintSprint CLEC has already met these requirements. 7.2 6.2 Service orders will be in a standard format designated by BellSouth. All Local Service Requests (“LSRs”) submitted for products and services under this Attachment will be subject to the OSS charges set forth in the General Terms and Conditions of this Agreement.BellSouthAT&T. 7.3 6.3 When notification is received from Teligent SprintSprint CLEC that a current End User end user of BellSouth AT&T will subscribe to TeligentSprintSprint CLEC’s service, standard service order intervals equivalent to the intervals employed by BellSouth AT&T in serving its own retail customers for the appropriate class of service will apply. 7.4 6.4 BellSouth AT&T will not require End User confirmation end user confirmation, under any circumstances, prior to establishing service for TeligentSprintSprint CLEC’s End User end user customer. Teligent SprintSprint CLEC must, however, be able to demonstrate End User end user authorization upon request. 7.5 Teligent 6.5 SprintSprint CLEC will be the single point of contact with BellSouth AT&T for all subsequent ordering activity resulting in additions or changes to resold services except that BellSouth AT&T will accept a request directly from the End User end user for conversion of the End Userend user's service from Teligent SprintSprint CLEC to BellSouth AT&T or will accept a request from another CLEC for conversion of the End Userend user's service from Teligent SprintSprint CLEC to the other LEC. BellSouth AT&T will notify Teligent within five (5) business days via US mail SprintSprint CLEC that such a request has been processed. 7.6 6.6 If BellSouth AT&T determines that an unauthorized change in local service to Teligent SprintSprint CLEC has occurred, BellSouth AT&T will reestablish service with the appropriate local service provider and will assess Teligent SprintSprint CLEC as the CLEC initiating the unauthorized change, the unauthorized change charge described in BellSouth FCC. F.C.C. Tariff No. 1, Section 13 or the applicable state tariffAT&Tstate tariff and/or Guidebook. Appropriate nonrecurring charges, as set forth in Section A4 of the General Subscriber Service TariffServicethe applicable AT&T state Tariff and/or Guidebook, will also be assessed to TeligentSprintSprint CLEC. These charges will can be refunded adjusted if Teligent SprintSprint CLEC provides satisfactory proof of authorization. 7.7 BellSouth reserves the right to secure a deposit not to exceed two (2) estimated months billing. Any such security deposit may be held during the continuance of the service as security for the payment of any and all amounts accruing for the service. 7.7.1 The fact that a security deposit has been made in no way relieves from complying with BellSouth’s regulations as to advance payments and the prompt payment of bills on presentation nor does it constitute a waiver or modification of the regular practices of BellSouth providing for the discontinuance of service for non-payment of any sums due BellSouth. 7.7.2 BellSouth reserves the right to increase the security deposit requirements when, in its sole judgment, circumstances so warrant and gross monthly billing has increased beyond the level initially used to determine the security deposit. 7.7.3 In the event that Teligent defaults on its account, service to Teligent will be terminated and any security deposits held will be applied to its account. 7.7.4 Interest on a security deposit shall accrue and be paid in accordance with the terms in the appropriate BellSouth tariff. 7.8 Orders to switch services “as is” shall be treated as a change of service and shall

Establishment of Service. 7.1 6.1 After receiving certification as a Local Exchange Company local exchange company from the appropriate regulatory agency, unless it has already done so, Teligent Excelink Communications will provide the appropriate BellSouth service center the necessary documentation to enable BellSouth to establish a master account for TeligentExcelink Communications’s resold services. Such documentation shall include the Application for Master Account, proof of authority to provide telecommunications services, an Operating Company Number ("OCN") assigned by the National Exchange Carriers Association ("NECA") and a tax exemption certificate, if applicable. When necessary deposit requirements are met, as described in Section 6.6 below, BellSouth will begin taking orders for the resale of service. 7.2 6.2 Service orders will be in a standard format designated by BellSouth. All Local Service Requests (“LSRs”) submitted for products and services under this Attachment will be subject to the OSS charges set forth in the General Terms and Conditions of this Agreement. 7.3 When notification is received from Teligent 6.3 Excelink Communications shall provide to BellSouth a blanket letter of authorization ("LOA") certifying that a current Excelink Communications will have End User of BellSouth will subscribe authorization prior to Teligent’s viewing the End User's customer service record or switching the End User's service, standard service order intervals for the appropriate class of service will apply. 7.4 . BellSouth will not require End User confirmation prior to establishing service for TeligentExcelink Communications’s End User customer. Teligent Excelink Communications must, however, be able to demonstrate End User authorization upon request. 7.5 Teligent will be the single point of contact with BellSouth for all subsequent ordering activity resulting in additions or changes to resold services except that 6.4 BellSouth will accept a request directly from the End User for conversion of the End User's service from Teligent Excelink Communications to BellSouth or will accept a request from another CLEC for conversion of the End User's service from Teligent Excelink Communications to such other CLEC. Upon completion of the other LEC. conversion BellSouth will notify Teligent within five (5) business days via US mail Excelink Communications that such a request conversion has been processedcompleted. 7.6 6.5 If BellSouth determines is informed that an unauthorized change in local service to Teligent Excelink Communications has occurred, BellSouth will reestablish service with the appropriate local service provider and will assess Teligent Excelink Communications as the CLEC initiating the alleged unauthorized change, the unauthorized change charge described in BellSouth FCC. FCC Tariff No. 1, Section 13 or applicable state tariff. Appropriate nonrecurring charges, as set forth in Section A4 of the General Subscriber Service Tariff, will also be assessed to TeligentExcelink Communications. These charges In accordance with FCC Slamming Liability Rules, the relevant governmental agency will determine if an unauthorized change has occurred. Resolution of all relevant issues shall be refunded if Teligent provides satisfactory proof of authorizationhandled directly with the authorized CLEC and Excelink Communications. 7.7 6.6 BellSouth reserves the right to secure the account with a suitable form of security deposit, unless satisfactory credit has already been established. 6.6.1 Such security deposit not shall take the form of cash for cash equivalent, an irrevocable Letter of Credit or other forms of security acceptable to exceed two (2) estimated months billingBellSouth. Any such security deposit may be held during the continuance of the service as security for the payment of any and all amounts accruing for the service. 7.7.1 6.6.2 If a security deposit is required, such security deposit shall be made prior to the inauguration of service. 6.6.3 Such security deposit shall be two months' estimated billing. 6.6.4 The fact that a security deposit has been made in no way relieves Excelink Communications from complying with BellSouth’s 's regulations as to advance payments and the prompt payment of bills on presentation nor does it constitute a waiver or modification of the regular practices of BellSouth providing for the discontinuance of service for non-payment of any sums due BellSouth. 7.7.2 6.6.5 BellSouth reserves the right to increase the security deposit requirements when, in its sole reasonable judgment, circumstances changes in Excelink Communications's financial status so warrant and and/or gross monthly billing has increased beyond the level initially used to determine the security deposit. 7.7.3 6.6.6 In the event that Teligent defaults service to Excelink Communications is terminated due to Excelink Communications's default on its account, service to Teligent will be terminated and any security deposits held will be applied to its Excelink Communications's account. 7.7.4 6.6.7 Interest on a cash or cash equivalent security deposit shall accrue and be paid in accordance with the terms in the appropriate BellSouth tariff. 7.8 Orders to switch services “as is” shall be treated as a change of service and shall

Establishment of Service. 7.1 6.1 After receiving certification as a Local Exchange Company local exchange company from the appropriate regulatory agency, unless it has already done so, Teligent MPC will provide the appropriate BellSouth service center the necessary documentation to enable BellSouth to establish a master account for TeligentMPC’s resold services. Such documentation shall include the Application for Master Account, proof of authority to provide telecommunications services, an Operating Company Number ("OCN") assigned by the National Exchange Carriers Association ("NECA") and a tax exemption certificate, if applicable. When necessary deposit requirements are met, BellSouth will begin taking orders for the resale of service. 7.2 6.2 Service orders will be in a standard format designated by BellSouth. All Local Service Requests (“LSRs”) submitted for products and services under this Attachment will be subject to the OSS charges set forth in the General Terms and Conditions of this Agreement. 7.3 6.3 When notification is received from Teligent MPC that a current End User end user of BellSouth will subscribe to TeligentMPC’s service, standard service order intervals for the appropriate class of service will apply. 7.4 6.4 BellSouth will not require End User end user confirmation prior to establishing service for TeligentMPC’s End User end user customer. Teligent MPC must, however, be able to demonstrate End User end user authorization upon request. 7.5 Teligent 6.5 MPC will be the single point of contact with BellSouth for all subsequent ordering activity resulting in additions or changes to resold services except that BellSouth will accept a request directly from the End User end user for conversion of the End Userend user's service from Teligent MPC to BellSouth or will accept a request from another CLEC for conversion of the End Userend user's service from Teligent MPC to the other LEC. BellSouth will notify Teligent within five (5) business days via US mail MPC that such a request has been processed. 7.6 6.6 If BellSouth determines that an unauthorized change in local service to Teligent MPC has occurred, BellSouth will reestablish service with the appropriate local service provider and will assess Teligent MPC as the CLEC initiating the unauthorized change, the unauthorized change charge described in BellSouth FCC. Tariff FCC No. 1, Section 13 or applicable state tariff. Appropriate nonrecurring charges, as set forth in Section A4 of the General Subscriber Service TariffGSST, will also be assessed to TeligentMPC. These charges will can be refunded adjusted if Teligent MPC provides satisfactory proof of authorization. 7.7 6.7 In order to safeguard its interest, BellSouth reserves the right to secure the account with a suitable form of security deposit, unless satisfactory credit has already been established. 6.7.1 Such security deposit not shall take the form of an irrevocable Letter of Credit or other forms of security acceptable to exceed two (2) estimated months billingBellSouth. Any such security deposit may be held during the continuance of the service as security for the payment of any and all amounts accruing for the service. 7.7.1 6.7.2 If a security deposit is required, such security deposit shall be made prior to the inauguration of service. 6.7.3 Such security deposit may not exceed two months' estimated billing. 6.7.4 The fact that a security deposit has been made in no way relieves MPC from complying with BellSouth’s 's regulations as to advance payments and the prompt payment of bills on presentation nor does it constitute a waiver or modification of the regular practices of BellSouth providing for the discontinuance of service for non-payment of any sums due BellSouth. 7.7.2 6.7.5 BellSouth reserves the right to increase the security deposit requirements when, in its sole judgment, circumstances so warrant and and/or gross monthly billing has increased beyond the level initially used to determine the security deposit. 7.7.3 6.7.6 In the event that Teligent MPC defaults on its account, service to Teligent MPC will be terminated and any security deposits held will be applied to its account. 7.7.4 6.7.7 Interest on a security deposit shall accrue and be paid in accordance with the terms in the appropriate BellSouth tariff. 7.8 Orders to switch services “as is” shall be treated as a change of service and shall

Establishment of Service. 7.1 6.1 After receiving certification as a Local Exchange Company local exchange company from the appropriate regulatory agency, unless it has already done so, Teligent Express Title will provide the appropriate BellSouth service center the necessary documentation to enable BellSouth to establish a master account for TeligentExpress Title’s resold services. Such documentation shall include the Application for Master Account, proof of authority to provide telecommunications services, an Operating Company Number ("OCN") assigned by the National Exchange Carriers Association ("NECA") and a tax exemption certificate, if applicable. When necessary deposit requirements are met, BellSouth will begin taking orders for the resale of service. 7.2 6.2 Service orders will be in a standard format designated by BellSouth. All Local Service Requests (“LSRs”) submitted for products and services under this Attachment will be subject to the OSS charges set forth in the General Terms and Conditions of this Agreement. 7.3 6.3 When notification is received from Teligent Express Title that a current End User end user of BellSouth will subscribe to TeligentExpress Title’s service, standard service order intervals for the appropriate class of service will apply. 7.4 6.4 BellSouth will not require End User end user confirmation prior to establishing service for TeligentExpress Title’s End User end user customer. Teligent Express Title must, however, be able to demonstrate End User end user authorization upon request. 7.5 Teligent 6.5 Express Title will be the single point of contact with BellSouth for all subsequent ordering activity resulting in additions or changes to resold services except that BellSouth will accept a request directly from the End User end user for conversion of the End Userend user's service from Teligent Express Title to BellSouth or will accept a request from another CLEC for conversion of the End Userend user's service from Teligent Express Title to the other LEC. BellSouth will notify Teligent within five (5) business days via US mail Express Title that such a request has been processed. 7.6 6.6 If BellSouth determines that an unauthorized change in local service to Teligent Express Title has occurred, BellSouth will reestablish service with the appropriate local service provider and will assess Teligent Express Title as the CLEC initiating the unauthorized change, the unauthorized change charge described in BellSouth FCC. F.C.C. Tariff No. 1, Section 13 or applicable state tariff. Appropriate nonrecurring charges, as set forth in Section A4 of the General Subscriber Service Tariff, will also be assessed to TeligentExpress Title. These charges will can be refunded adjusted if Teligent Express Title provides satisfactory proof of authorization. 7.7 6.7 In order to safeguard its interest, BellSouth reserves the right to secure the account with a suitable form of security deposit, unless satisfactory credit has already been established. 6.7.1 Such security deposit not shall take the form of an irrevocable Letter of Credit or other forms of security acceptable to exceed two (2) estimated months billingBellSouth. Any such security deposit may be held during the continuance of the service as security for the payment of any and all amounts accruing for the service. 7.7.1 6.7.2 If a security deposit is required, such security deposit shall be made prior to the inauguration of service. 6.7.3 Such security deposit may not exceed two months' estimated billing. 6.7.4 The fact that a security deposit has been made in no way relieves Express Title from complying with BellSouth’s 's regulations as to advance payments and the prompt payment of bills on presentation nor does it constitute a waiver or modification of the regular practices of BellSouth providing for the discontinuance of service for non-payment of any sums due BellSouth. 7.7.2 6.7.5 BellSouth reserves the right to increase the security deposit requirements when, in its sole judgment, circumstances so warrant and and/or gross monthly billing has increased beyond the level initially used to determine the security deposit. 7.7.3 6.7.6 In the event that Teligent Express Title defaults on its account, service to Teligent Express Title will be terminated and any security deposits held will be applied to its account. 7.7.4 6.7.7 Interest on a security deposit shall accrue and be paid in accordance with the terms in the appropriate BellSouth tariff. 7.8 Orders to switch services “as is” shall be treated as a change of service and shall

Establishment of Service. 7.1 6.1 After receiving certification as a Local Exchange Company local exchange company from the appropriate regulatory agency, unless it has already done so, Teligent Centennial will provide the appropriate BellSouth service center the necessary documentation to enable BellSouth to establish a master account for TeligentCentennial’s resold services. Such documentation shall include the Application for Master Account, proof of authority to provide telecommunications services, an Operating Company Number ("OCN") assigned by the National Exchange Carriers Association ("NECA") and a tax exemption certificate, if applicable. When necessary deposit requirements are met, BellSouth will begin taking orders for the resale of service. 7.2 6.2 Service orders will be in a standard format designated by BellSouth. All Local Service Requests (“LSRs”) submitted for products and services under this Attachment will be subject to the OSS charges set forth in the General Terms and Conditions of this Agreement. 7.3 6.3 When notification is received from Teligent Centennial that a current End User end user of BellSouth will subscribe to TeligentCentennial’s service, standard service order intervals for the appropriate class of service will apply. 7.4 6.4 BellSouth will not require End User end user confirmation prior to establishing service for TeligentCentennial’s End User end user customer. Teligent Centennial must, however, be able to demonstrate End User end user authorization upon request. 7.5 Teligent 6.5 Centennial will be the single point of contact with BellSouth for all subsequent ordering activity resulting in additions or changes to resold services except that BellSouth will accept a request directly from the End User end user for conversion of the End Userend user's service from Teligent Centennial to BellSouth or will accept a request from another CLEC for conversion of the End Userend user's service from Teligent Centennial to the other LEC. BellSouth will notify Teligent within five (5) business days via US mail Centennial that such a request has been processed. 7.6 6.6 If BellSouth determines that an unauthorized change in local service to Teligent Centennial has occurred, BellSouth will reestablish service with the appropriate local service provider and will assess Teligent Centennial as the CLEC initiating the unauthorized change, the unauthorized change charge described in BellSouth FCC. F.C.C. Tariff No. 1, Section 13 or applicable state tariff. Appropriate nonrecurring charges, as set forth in Section A4 of the General Subscriber Service Tariff, will also be assessed to TeligentCentennial. These charges will can be refunded adjusted if Teligent Centennial provides satisfactory proof of authorization. 7.7 6.7 In order to safeguard its interest, BellSouth reserves the right to secure the account with a suitable form of security deposit, unless satisfactory credit has already been established. 6.7.1 Such security deposit not shall take the form of an irrevocable Letter of Credit or other forms of security acceptable to exceed two (2) estimated months billingBellSouth. Any such security deposit may be held during the continuance of the service as security for the payment of any and all amounts accruing for the service. 7.7.1 6.7.2 If a security deposit is required, such security deposit shall be made prior to the inauguration of service. 6.7.3 Such security deposit may not exceed two months' estimated billing. 6.7.4 The fact that a security deposit has been made in no way relieves Centennial from complying with BellSouth’s 's regulations as to advance payments and the prompt payment of bills on presentation nor does it constitute a waiver or modification of the regular practices of BellSouth providing for the discontinuance of service for non-payment of any sums due BellSouth. 7.7.2 6.7.5 BellSouth reserves the right to increase the security deposit requirements when, in its sole judgment, circumstances so warrant and and/or gross monthly billing has increased beyond the level initially used to determine the security deposit. 7.7.3 6.7.6 In the event that Teligent Centennial defaults on its account, service to Teligent Centennial will be terminated and any security deposits held will be applied to its account. 7.7.4 6.7.7 Interest on a security deposit shall accrue and be paid in accordance with the terms in the appropriate BellSouth tariff. 7.8 Orders to switch services “as is” shall be treated as a change of service and shall

Establishment of Service. 7.1 A. After receiving certification as a Local Exchange Company local exchange company from the appropriate regulatory agency, unless it has already done so, Teligent NATC will provide the appropriate BellSouth Company service center the necessary documentation to enable BellSouth the Company to establish a master account for Teligent’s resold servicesNATC. Such documentation shall include the Application for Master Account, proof of authority to provide telecommunications services, an Operating Company Number ("OCN") assigned by the National Exchange Carriers Association ("NECA") and a tax exemption certificate, if applicable. When necessary deposit requirements are met, BellSouth the Company will begin taking orders for the resale of service. 7.2 B. Service orders will be in a standard format designated by BellSouth. All Local Service Requests (“LSRs”) submitted for products and services under this Attachment will be subject to the OSS charges set forth in the General Terms and Conditions of this AgreementCompany. 7.3 C. When notification is received from Teligent NATC that a current End User customer of BellSouth the Company will subscribe to TeligentNATC’s service, standard service order intervals for the appropriate class of service will apply. 7.4 BellSouth D. The Company will not require End User end user confirmation prior to establishing service for TeligentNATC’s End User end user customer. Teligent NATC must, however, be able to demonstrate End User end user authorization upon request. 7.5 Teligent E. NATC will be the single point of contact with BellSouth the Company for all subsequent ordering activity resulting in additions or changes to resold services except that BellSouth the Company will accept a request directly from the End User end user for conversion of the End Userend user's service from Teligent NATC to BellSouth the Company or will accept a request from another CLEC for conversion of the End Userend user's service from Teligent NATC to the other LEC. BellSouth The Company will notify Teligent within five (5) business days via US mail NATC that such a request has been processed. 7.6 F. If BellSouth the Company determines that an unauthorized change in local service to Teligent NATC has occurred, BellSouth the Company will reestablish service with the appropriate local service provider and will assess Teligent NATC as the CLEC initiating the unauthorized change, the unauthorized change charge described in BellSouth FCC. F.C.C. Tariff No. 1, Section 13 or applicable state tariff. Appropriate nonrecurring charges, as set forth in Section A4 A4. of the General Subscriber Service Tariff, will also be assessed to TeligentNATC. These charges will can be refunded adjusted if Teligent NATC provides satisfactory proof of authorization. 7.7 BellSouth G. In order to safeguard its interest, the Company reserves the right to secure the account with a suitable form of security deposit, unless satisfactory credit has already been established. 1. Such security deposit not shall take the form of an irrevocable Letter of Credit or other forms of security acceptable to exceed two (2) estimated months billingthe Company. Any such security deposit may be held during the continuance of the service as security for the payment of any and all amounts accruing for the service. 7.7.1 2. If a security deposit is required, such security deposit shall be made prior to the inauguration of service. 3. Such security deposit may not exceed two months' estimated billing. 4. The fact that a security deposit has been made in no way relieves NATC from complying with BellSouth’s the Company's regulations as to advance payments and the prompt payment of bills on presentation nor does it constitute a waiver or modification of the regular practices of BellSouth the Company providing for the discontinuance of service for non-payment of any sums due BellSouththe Company. 7.7.2 BellSouth 5. The Company reserves the right to increase the security deposit requirements when, in its sole judgment, circumstances so warrant and and/or gross monthly billing has increased beyond the level initially used to determine the security deposit. 7.7.3 6. In the event that Teligent NATC defaults on its account, service to Teligent NATC will be terminated and any security deposits held will be applied to its account. 7.7.4 7. Interest on a security deposit shall accrue and be paid refunded in accordance with the terms in the appropriate BellSouth tariff. 7.8 Orders to switch services “as is” shall be treated as a change of service and shall

Establishment of Service. 7.1 6.1 After receiving certification as a Local Exchange Company local exchange company from the appropriate regulatory agency, unless it has already done so, Teligent Telepak will provide the appropriate BellSouth service center the necessary documentation to enable BellSouth to establish a master account for Teligent’s resold servicesTelepak. Such documentation shall include the Application for Master Account, proof of authority to provide telecommunications services, an Operating Company Number ("OCN") assigned by the National Exchange Carriers Association ("NECA") and a tax exemption certificate, if applicable. When necessary deposit requirements are met, BellSouth will begin taking orders for the resale of service. 7.2 6.2 Service orders will be in a standard format designated by BellSouth. All Local Service Requests (“LSRs”) submitted for products and services under this Attachment will be subject to the OSS charges set forth in the General Terms and Conditions of this Agreement. 7.3 6.3 When notification is received from Teligent Telepak that a current End User customer of BellSouth will subscribe to TeligentTelepak’s service, standard service order intervals for the appropriate class of service will apply. 7.4 6.4 BellSouth will not require End User end user confirmation prior to establishing service for TeligentTelepak’s End User end user customer. Teligent ▇▇▇▇▇▇▇ must, however, be able to demonstrate End User end user authorization upon request. 7.5 Teligent 6.5 Telepak will be the single point of contact with BellSouth for all subsequent ordering activity resulting in additions or changes to resold services except that BellSouth will accept a request directly from the End User end user for conversion of the End Userend user's service from Teligent Telepak to BellSouth or will accept a request from another CLEC for conversion of the End Userend user's service from Teligent Telepak to the other LEC. BellSouth will notify Teligent within five (5) business days via US mail Telepak that such a request has been processed. 7.6 6.6 If BellSouth determines that an unauthorized change in local service to Teligent or from Telepak has occurred, BellSouth will reestablish service with the appropriate local service provider and will assess Teligent as the CLEC initiating the unauthorized change, change the unauthorized change charge described in BellSouth FCC. FCC Tariff No. 1, Section 13 or applicable state tariff. Appropriate The appropriate nonrecurring charges, as set forth in Section A4 A4. of the General Subscriber Service Tariff, to reestablish service with the appropriate local service provider will also be assessed to Teligentthe CLEC initiating the unauthorized change. These charges will can be refunded adjusted if Teligent provides satisfactory proof of authorizationauthorization is provided. 7.7 6.7 In order to safeguard its interest, BellSouth reserves the right to secure the account with a suitable form of security deposit, unless satisfactory credit has already been established. 6.7.1 Such security deposit not shall take the form of an irrevocable Letter of Credit or other forms of security acceptable to exceed two (2) estimated months billingBellSouth. Any such security deposit may be held during the continuance of the service as security for the payment of any and all amounts accruing for the service. 7.7.1 6.7.2 If a security deposit is required, such security deposit shall be made prior to the inauguration of service. 6.7.3 Such security deposit may not exceed two months’ estimated billing. 6.7.4 The fact that a security deposit has been made in no way relieves Telepak from complying with BellSouth’s regulations as to advance payments and the prompt payment of bills on presentation nor does it constitute a waiver or modification of the regular practices of BellSouth providing for the discontinuance of service for non-non- payment of any sums due BellSouth. 7.7.2 6.7.5 BellSouth reserves the right to increase the security deposit requirements when, in its sole judgment, circumstances so warrant and and/or gross monthly billing has increased beyond the level initially used to determine the security deposit. 7.7.3 6.7.6 In the event that Teligent Telepak defaults on its account, service to Teligent Telepak will be terminated and any security deposits held will be applied to its account. 7.7.4 6.7.7 Interest on a security deposit shall accrue and be paid refunded in accordance with the terms in the appropriate BellSouth tariff. 7.8 Orders to switch services “as is” shall be treated as a change of service and shall

Establishment of Service. 7.1 6.1 After receiving certification as a Local Exchange Company local exchange company from the appropriate regulatory agency, unless it has already done so, Teligent Rhythms will provide the appropriate BellSouth service center the necessary documentation to enable BellSouth to establish a master account for Teligent’s Rhythms’ resold services. Such documentation shall include the Application for Master Account, proof of authority to provide telecommunications services, an Operating Company Number ("OCN") assigned by the National Exchange Carriers Association ("NECA") and a tax exemption certificate, if applicable. When necessary deposit requirements are met, as described in Section 6.6 below, BellSouth will begin taking orders for the resale of service. 7.2 6.2 Service orders will be in a standard format designated by BellSouth. All Local Service Requests (“LSRs”) submitted for products and services under this Attachment will be subject to the OSS charges set forth in the General Terms and Conditions of this Agreement. 7.3 When notification is received from Teligent 6.3 Rhythms shall provide to BellSouth a blanket letter of authorization ("LOA") certifying that a current Rhythms will have End User of BellSouth will subscribe authorization prior to Teligent’s viewing the End User's customer service record or switching the End User's service, standard service order intervals for the appropriate class of service will apply. 7.4 . BellSouth will not require End User confirmation prior to establishing service for Teligent’s Rhythms’ End User customer. Teligent Rhythms must, however, be able to demonstrate End User authorization upon request. 7.5 Teligent will be the single point of contact with BellSouth for all subsequent ordering activity resulting in additions or changes to resold services except that 6.4 BellSouth will accept a request directly from the End User for conversion of the End User's service from Teligent Rhythms to BellSouth or will accept a request from another CLEC for conversion of the End User's service from Teligent Rhythms to such other CLEC. Upon completion of the other LEC. conversion BellSouth will notify Teligent within five (5) business days via US mail Rhythms that such a request conversion has been processedcompleted. 7.6 6.5 If BellSouth determines that an unauthorized change in local service to Teligent Rhythms has occurred, BellSouth will reestablish service with the appropriate local service provider and will assess Teligent Rhythms as the CLEC initiating the unauthorized change, the unauthorized change charge described in BellSouth FCC. Tariff FCC No. 1, Section 13 or applicable state tariff. Appropriate nonrecurring charges, as set forth in Section A4 of the General Subscriber Service TariffGSST, will also be assessed to TeligentRhythms. These charges will can be refunded adjusted if Teligent Rhythms provides satisfactory proof of authorization. 7.7 6.6 BellSouth reserves the right to secure the account with a suitable form of security deposit, unless satisfactory credit has already been established. 6.6.1 Such security deposit not shall take the form of cash for cash equivalent, an irrevocable Letter of Credit or other forms of security acceptable to exceed two (2) estimated months billingBellSouth. Any such security deposit may be held during the continuance of the service as security for the payment of any and all amounts accruing for the service. 7.7.1 6.6.2 If a security deposit is required, such security deposit shall be made prior to the inauguration of service. 6.6.3 Such security deposit shall be two months' estimated billing. 6.6.4 The fact that a security deposit has been made in no way relieves Rhythms from complying with BellSouth’s 's regulations as to advance payments and the prompt payment of bills on presentation nor does it constitute a waiver or modification of the regular practices of BellSouth providing for the discontinuance of service for non-payment of any sums due BellSouth. 7.7.2 6.6.5 BellSouth reserves the right to increase the security deposit requirements when, in its sole reasonable judgment, circumstances changes in Rhythms’ financial status so warrant and and/or gross monthly billing has increased beyond the level initially used to determine the security deposit. 7.7.3 6.6.6 In the event that Teligent defaults service to Rhythms is terminated due to Rhythms’ default on its account, service to Teligent will be terminated and any security deposits held will be applied to its Rhythms’ account. 7.7.4 6.6.7 Interest on a cash or cash equivalent security deposit shall accrue and be paid in accordance with the terms in the appropriate BellSouth tariff. 7.8 Orders to switch services “as is” shall be treated as a change of service and shall

Establishment of Service. 7.1 After receiving certification as a Local Exchange Company from the appropriate regulatory agency, unless it has already done so, Teligent Verizon Avenue will provide the appropriate BellSouth service center the necessary documentation to enable BellSouth to establish a master account for TeligentVerizon Avenue’s resold services. Such documentation shall include the Application for Master Account, proof of authority to provide telecommunications services, an Operating Company Number ("OCN") assigned by the National Exchange Carriers Association ("NECA") and a tax exemption certificate, if applicable. When necessary deposit requirements are met, BellSouth will begin taking orders for the resale of service. 7.2 Service orders will be in a standard format designated by BellSouth. All Local Service Requests (“LSRs”) submitted for products and services under this Attachment will be subject to the OSS charges set forth in the General Terms and Conditions of this Agreement. 7.3 When notification is received from Teligent Verizon Avenue that a current End User of BellSouth will subscribe to TeligentVerizon Avenue’s service, standard service order intervals for the appropriate class of service will apply. 7.4 BellSouth will not require End User confirmation prior to establishing service for TeligentVerizon Avenue’s End User customer. Teligent Verizon Avenue must, however, be able to demonstrate End User authorization upon reasonable request. 7.5 Teligent Verizon Avenue will be the single point of contact with BellSouth for all subsequent ordering activity resulting in additions or changes to resold services except that BellSouth will accept a request directly from the End User for conversion of the End User's service from Teligent Verizon Avenue to BellSouth or will accept a request from another CLEC for conversion of the End User's service from Teligent Verizon Avenue to the other LEC. BellSouth will notify Teligent Verizon Avenue within five (5) business days via US mail mail, or via the loss notification report accessible on the internet, that such a request has been processed. 7.6 If BellSouth determines determines, in accordance with applicable FCC or State Commission rules and regulations, that an unauthorized change in local service to Teligent Verizon Avenue has occurred, BellSouth will reestablish service with the appropriate local service provider and will assess Teligent Verizon Avenue as the CLEC initiating the unauthorized change, the unauthorized change charge described in BellSouth FCC. Tariff No. 1, Section 13 or applicable state tariff. Appropriate nonrecurring charges, as set forth in Section A4 of the General Subscriber Service Tariff, will also be assessed to TeligentVerizon Avenue. These charges will be refunded if Teligent Verizon Avenue provides satisfactory proof of authorization. 7.7 BellSouth reserves the right to secure a deposit not to exceed two (2) estimated months billing. Any such security deposit may be held during the continuance of the service as security for the payment of any and all amounts accruing for the service. 7.7.1 The fact that a security deposit has been made in no way relieves from complying with BellSouth’s regulations as to advance payments and the prompt payment of bills on presentation nor does it constitute a waiver or modification of the regular practices of BellSouth providing for the discontinuance of service for non-payment of any sums due BellSouth. 7.7.2 BellSouth reserves the right to increase the security deposit requirements when, in its sole judgment, circumstances so warrant and gross monthly billing has increased beyond the level initially used to determine the security deposit. 7.7.3 In the event that Teligent Verizon Avenue defaults on its account, service to Teligent Verizon Avenue will be terminated and any security deposits held will be applied to its account. 7.7.4 Interest on a security deposit shall accrue and be paid in accordance with the terms in the appropriate BellSouth tariff. 7.8 Orders to switch services “as is” shall be treated as a change of service and shall

Establishment of Service. 7.1 A. After receiving certification as a Local Exchange Company local exchange company from the appropriate regulatory agency, unless it has already done so, Teligent Payphone Vending Services will provide the appropriate BellSouth Company service center the necessary documentation to enable BellSouth the Company to establish a master account for Teligent’s resold servicesPayphone Vending Services. Such documentation shall include the Application for Master Account, proof of authority to provide telecommunications services, an Operating Company Number ("OCN") assigned by the National Exchange Carriers Association ("NECA") and a tax exemption certificate, if applicable. When necessary deposit requirements are met, BellSouth the Company will begin taking orders for the resale of service. 7.2 B. Service orders will be in a standard format designated by BellSouth. All Local Service Requests (“LSRs”) submitted for products and services under this Attachment will be subject to the OSS charges set forth in the General Terms and Conditions of this AgreementCompany. 7.3 C. When notification is received from Teligent Payphone Vending Services that a current End User customer of BellSouth the Company will subscribe to TeligentPayphone Vending Services’s service, standard service order intervals for the appropriate class of service will apply. 7.4 BellSouth D. The Company will not require End User end-user confirmation prior to establishing service for TeligentPayphone Vending Services’s End User end-user customer. Teligent Payphone Vending Services must, however, be able to demonstrate End User end- user authorization upon request. 7.5 Teligent E. Payphone Vending Services will be the single point of contact with BellSouth the Company for all subsequent ordering activity resulting in additions or changes to resold services except that BellSouth the Company will accept a request directly from the End User end user for conversion of the End Userend user's service from Teligent Payphone Vending Services to BellSouth the Company or will accept a request from another CLEC for conversion of the End Userend user's service from Teligent Payphone Vending Services to the other LEC. BellSouth The Company will notify Teligent within five (5) business days via US mail Payphone Vending Services that such a request has been processed. 7.6 F. If BellSouth the Company determines that an unauthorized change in local service to Teligent Payphone Vending Services has occurred, BellSouth the Company will reestablish service with the appropriate local service provider and will assess Teligent Payphone Vending Services as the CLEC initiating the unauthorized change, the unauthorized change charge described in BellSouth FCC. F.C.C. Tariff No. 1, Section 13 or applicable state tariff. Appropriate nonrecurring charges, as set forth in Section A4 A4. of the General Subscriber Service Services Tariff, will also be assessed to TeligentPayphone Vending Services. These charges will can be refunded adjusted if Teligent Payphone Vending Services provides satisfactory proof of authorization. 7.7 BellSouth G. In order to safeguard its interest, the Company reserves the right to secure the account with a suitable form of security deposit, unless satisfactory credit has already been established. 1. Such security deposit not shall take the form of an irrevocable Letter of Credit or other forms of security acceptable to exceed two (2) estimated months billingthe Company. Any such security deposit may be held during the continuance of the service as security for the payment of any and all amounts accruing for the service. 7.7.1 2. If a security deposit is required, such security deposit shall be made prior to the inauguration of service. 3. Such security deposit may not exceed two months’ estimated billing. 4. The fact that a security deposit has been made in no way relieves Payphone Vending Services from complying with BellSouththe Company’s regulations as to advance payments and the prompt payment of bills on presentation nor does it constitute a waiver or modification of the regular practices of BellSouth the Company providing for the discontinuance of service for non-payment of any sums due BellSouththe Company. 7.7.2 BellSouth 5. The Company reserves the right to increase the security deposit requirements when, in its sole judgment, circumstances so warrant and and/or gross monthly billing has increased beyond the level initially used to determine the security deposit. 7.7.3 6. In the event that Teligent Payphone Vending Services defaults on its account, service to Teligent Payphone Vending Services will be terminated and any security deposits held will be applied to its account. 7.7.4 7. Interest on a security deposit shall accrue and be paid refunded in accordance with the terms in the appropriate BellSouth tariff. 7.8 Orders to switch services “as is” shall be treated as a change of service and shall

Establishment of Service. 7.1 6.1 After receiving certification as a Local Exchange Company local exchange company from the appropriate regulatory agency, unless it has already done so, Teligent BroadRiver will provide the appropriate BellSouth service center the necessary documentation to enable BellSouth to establish a master account for TeligentBroadRiver’s resold services. Such documentation shall include the Application for Master Account, proof of authority to provide telecommunications services, an Operating Company Number ("OCN") assigned by the National Exchange Carriers Association ("NECA") and a tax exemption certificate, if applicable. When necessary deposit requirements are met, BellSouth will begin taking orders for the resale of service. 7.2 6.2 Service orders will be in a standard format designated by BellSouth. All Local Service Requests (“LSRs”) submitted for products and services under this Attachment will be subject to the OSS charges set forth in the General Terms and Conditions of this Agreement. 7.3 6.3 When notification is received from Teligent BroadRiver that a current End User end user of BellSouth will subscribe to TeligentBroadRiver’s service, standard service order intervals for the appropriate class of service will apply. 7.4 6.4 BellSouth will not require End User end user confirmation prior to establishing service for TeligentBroadRiver’s End User end user customer. Teligent BroadRiver must, however, be able to demonstrate End User end user authorization upon request. 7.5 Teligent 6.5 BroadRiver will be the single point of contact with BellSouth for all subsequent ordering activity resulting in additions or changes to resold services except that BellSouth will accept a request directly from the End User end user for conversion of the End Userend user's service from Teligent BroadRiver to BellSouth or will accept a request from another CLEC for conversion of the End Userend user's service from Teligent BroadRiver to the other LEC. BellSouth will notify Teligent within five (5) business days via US mail BroadRiver that such a request has been processed. 7.6 6.6 If BellSouth determines that an unauthorized change in local service to Teligent BroadRiver has occurred 6.7 In order to safeguard its interest, BellSouth will reestablish service with the appropriate local service provider and will assess Teligent as the CLEC initiating the unauthorized change, the unauthorized change charge described in BellSouth FCC. Tariff No. 1, Section 13 or applicable state tariff. Appropriate nonrecurring charges, as set forth in Section A4 of the General Subscriber Service Tariff, will also be assessed to Teligent. These charges will be refunded if Teligent provides satisfactory proof of authorization. 7.7 BellSouth reserves the right to secure the account with a reasonable and nondiscriminatory form of security deposit not unless satisfactory credit has already been established. 6.7.1 Such security deposit shall take the form of an irrevocable Letter of Credit or other forms of security acceptable to exceed two (2) estimated months billingBellSouth. Any such security deposit may be held during the continuance of the service as security for the payment of any and all amounts accruing for the service. 7.7.1 6.7.2 If a security deposit is required, such security deposit shall be made prior to the inauguration of service. 6.7.3 Such security deposit may not exceed two months' estimated billing. 6.7.4 The fact that a security deposit has been made in no way relieves BroadRiver from complying with BellSouth’s 's regulations as to advance payments and the prompt payment of bills on presentation nor does it constitute a waiver or modification of the regular practices of BellSouth providing for the discontinuance of service for non-payment of any sums due BellSouth. 7.7.2 6.7.5 BellSouth reserves the right to increase the security deposit requirements when, in its sole judgmentreasonable judgment and on a nondiscriminatory basis, circumstances so warrant and and/or gross monthly billing has increased beyond the level initially used to determine the security deposit. 7.7.3 6.7.6 In the event that Teligent BroadRiver defaults on its account, service to Teligent BroadRiver will be terminated and any security deposits held will be applied to its account. 7.7.4 6.7.7 Interest on a security deposit shall accrue and be paid in accordance with the terms in the appropriate BellSouth tariff. 7.8 6.8 Orders to switch services “as is” shall be treated as a change of service and shallshall not be treated as a disconnection and subsequent reconnection of service.

Establishment of Service. 7.1 6.1 After receiving certification as a Local Exchange Company local exchange company from the appropriate regulatory agency, unless it has already done so, Teligent TLX will provide the appropriate BellSouth service center the necessary documentation to enable BellSouth to establish a master account for TeligentTLX’s resold services. Such documentation shall include the Application for Master Account, proof of authority to provide telecommunications services, an Operating Company Number ("OCN") assigned by the National Exchange Carriers Association ("NECA") and a tax exemption certificate, if applicable. When necessary deposit requirements are met, BellSouth will begin taking orders for the resale of service. 7.2 6.2 Service orders will be in a standard format designated by BellSouth. All Local Service Requests (“LSRs”) submitted for products and services under this Attachment will be subject to the OSS charges set forth in the General Terms and Conditions of this Agreement. 7.3 6.3 When notification is received from Teligent TLX that a current End User end user of BellSouth will subscribe to TeligentTLX’s service, standard service order intervals for the appropriate class of service will apply. 7.4 6.4 BellSouth will not require End User end user confirmation prior to establishing service for TeligentTLX’s End User end user customer. Teligent TLX must, however, be able to demonstrate End User end user authorization upon request. 7.5 Teligent 6.5 TLX will be the single point of contact with BellSouth for all subsequent ordering activity resulting in additions or changes to resold services except that BellSouth will accept a request directly from the End User end user for conversion of the End Userend user's service from Teligent TLX to BellSouth or will accept a request from another CLEC for conversion of the End Userend user's service from Teligent TLX to the other LEC. BellSouth will notify Teligent within five (5) business days via US mail TLX that such a request has been processed. 7.6 6.6 If BellSouth determines that an unauthorized change in local service to Teligent TLX has occurred, BellSouth will reestablish service with the appropriate local service provider and will assess Teligent TLX as the CLEC initiating the unauthorized change, the unauthorized change charge described in BellSouth FCC. F.C.C. Tariff No. 1, Section 13 or applicable state tariff. Appropriate nonrecurring charges, as set forth in Section A4 of the General Subscriber Service Tariff, will also be assessed to TeligentTLX. These charges will can be refunded adjusted if Teligent TLX provides satisfactory proof of authorization. 7.7 6.7 In order to safeguard its interest, BellSouth reserves the right to secure the account with a suitable form of security deposit, unless satisfactory credit has already been established. 6.7.1 Such security deposit not shall take the form of an irrevocable Letter of Credit or other forms of security acceptable to exceed two (2) estimated months billingBellSouth. Any such security deposit may be held during the continuance of the service as security for the payment of any and all amounts accruing for the service. 7.7.1 6.7.2 If a security deposit is required, such security deposit shall be made prior to the inauguration of service. 6.7.3 Such security deposit may not exceed two months' estimated billing. 6.7.4 The fact that a security deposit has been made in no way relieves TLX from complying with BellSouth’s 's regulations as to advance payments and the prompt payment of bills on presentation nor does it constitute a waiver or modification of the regular practices of BellSouth providing for the discontinuance of service for non-payment of any sums due BellSouth. 7.7.2 6.7.5 BellSouth reserves the right to increase the security deposit requirements when, in its sole judgment, circumstances so warrant and and/or gross monthly billing has increased beyond the level initially used to determine the security deposit. 7.7.3 6.7.6 In the event that Teligent TLX defaults on its account, service to Teligent TLX will be terminated and any security deposits held will be applied to its account. 7.7.4 6.7.7 Interest on a security deposit shall accrue and be paid in accordance with the terms in the appropriate BellSouth tariff. 7.8 Orders to switch services “as is” shall be treated as a change of service and shall

Establishment of Service. 7.1 A. After receiving certification as a Local Exchange Company local exchange company from the appropriate regulatory agency, unless it has already done so, Teligent Reseller will provide the appropriate BellSouth Company service center the necessary documentation to enable BellSouth the Company to establish a master account for Teligent’s resold servicesReseller. Such documentation shall include the Application for Master Account, proof of authority to provide telecommunications services, an Operating Company Number ("OCN") assigned by the National Exchange Carriers Association ("NECA") and a tax exemption certificate, if applicable. When necessary deposit requirements are met, BellSouth the Company will begin taking orders for the resale of service. 7.2 B. Service orders will be in a standard format designated by BellSouth. All Local Service Requests (“LSRs”) submitted for products and services under this Attachment will be subject to the OSS charges set forth in the General Terms and Conditions of this AgreementCompany. 7.3 C. When notification is received from Teligent Reseller that a current End User customer of BellSouth the Company will subscribe to Teligent’s Reseller's service, standard service order intervals for the appropriate class of service will apply. 7.4 BellSouth D. The Company will not require End User end user confirmation prior to establishing service for Teligent’s End User Reseller's end user customer. Teligent Reseller must, however, be able to demonstrate End User end user authorization upon request. 7.5 Teligent E. Reseller will be the single point of contact with BellSouth the Company for all subsequent ordering activity resulting in additions or changes to resold services except that BellSouth the Company will accept a request directly from the End User end user for conversion of the End Userend user's service from Teligent Reseller to BellSouth the Company or will accept a request from another CLEC OLEC for conversion of the End Userend user's service from Teligent the Reseller to the other LEC. BellSouth The Company will notify Teligent within five (5) business days via US mail Reseller that such a request has been processed. 7.6 If BellSouth F. if the Company determines that an unauthorized change in local service to Teligent Reseller has occurred, BellSouth the Company will reestablish service with the appropriate local service provider and will assess Teligent Reseller as the CLEC OLEC initiating the unauthorized change, the unauthorized change charge described in BellSouth FCC. F.C.C, Tariff No. 1. 1, Section 13 or applicable state tariff13. Appropriate nonrecurring charges, as set forth in Section A4 A4. of the General Subscriber Service Tariff, will also be assessed to TeligentReseller. These charges will can be refunded adjusted if Teligent Reseller provides satisfactory proof of authorization. 7.7 BellSouth reserves the right G. The Company may, in order to secure safeguard its interest, require Reseller to make a deposit not to exceed two (2) estimated months billingbe held by the Company as a guarantee of the payment of rates and charges, unless satisfactory credit has already been established. Any such security deposit may be held during the continuance of the service as security for the payment of any and all amounts accruing for the service. 7.7.1 The fact that a security H. Such deposit has been made in no way relieves from complying with BellSouth’s regulations as to advance payments and the prompt payment of bills on presentation nor does it constitute a waiver or modification of the regular practices of BellSouth providing for the discontinuance of service for non-payment of any sums due BellSouthmay not exceed two months' estimated billing. 7.7.2 BellSouth reserves the right to increase the security deposit requirements when, in its sole judgment, circumstances so warrant and gross monthly billing has increased beyond the level initially used to determine the security deposit. 7.7.3 In the event that Teligent defaults on its account, service to Teligent will be terminated and any security deposits held will be applied to its account. 7.7.4 Interest on a security deposit shall accrue and be paid in accordance with the terms in the appropriate BellSouth tariff. 7.8 Orders to switch services “as is” shall be treated as a change of service and shall

Establishment of Service. 7.1 6.1 After receiving certification as a Local Exchange Company local exchange company from the appropriate regulatory agency, unless it has already done so, Teligent Intermedia will provide the appropriate BellSouth service center the necessary documentation to enable BellSouth to establish a master account for TeligentIntermedia’s resold services. Such documentation shall include the Application for Master Account, proof of authority to provide telecommunications services, an Operating Company Number ("OCN") assigned by the National Exchange Carriers Association ("NECA") and a tax exemption certificate, if applicable. When necessary deposit requirements are met, BellSouth will begin taking orders for the resale of service. 7.2 6.2 Service orders will be in a standard format designated by BellSouth. All Local Service Requests (“LSRs”) submitted for products and services under this Attachment will be subject to the OSS charges set forth in the General Terms and Conditions of this Agreement. 7.3 6.3 When notification is received from Teligent Intermedia that a current End User end user of BellSouth will subscribe to TeligentIntermedia’s service, standard service order intervals for the appropriate class of service will apply. 7.4 6.4 BellSouth will not require End User end user confirmation prior to establishing service for TeligentIntermedia’s End User end user customer. Teligent Intermedia must, however, be able to demonstrate End User end user authorization upon request. 7.5 Teligent 6.5 Intermedia will be the single point of contact with BellSouth for all subsequent ordering activity resulting in additions or changes to resold services except that BellSouth will accept a request directly from the End User end user for conversion of the End Userend user's service from Teligent Intermedia to BellSouth or will accept a request from another CLEC for conversion of the End Userend user's service from Teligent Intermedia to the other LEC. BellSouth will notify Teligent within five (5) business days via US mail Intermedia that such a request has been processed. 7.6 6.6 If BellSouth determines that an unauthorized change in local service to Teligent Intermedia has occurred, BellSouth will reestablish service with the appropriate local service provider and will assess Teligent Intermedia as the CLEC initiating the unauthorized change, the unauthorized change charge described in BellSouth FCC. F.C.C. Tariff No. 1, Section 13 or applicable state tariff. Appropriate nonrecurring charges, as set forth in Section A4 A4. of the General Subscriber Service Tariff, will also be assessed to TeligentIntermedia. These charges will can be refunded adjusted if Teligent Intermedia provides satisfactory proof of authorization. 7.7 6.7 In order to safeguard its interest, BellSouth reserves the right to secure the account with a suitable form of security deposit, unless satisfactory credit has already been established. 6.7.1 Such security deposit not shall take the form of an irrevocable Letter of Credit or other forms of security acceptable to exceed two (2) estimated months billingBellSouth. Any such security deposit may be held during the continuance of the service as security for the payment of any and all amounts accruing for the service. 7.7.1 6.7.2 If a security deposit is required, such security deposit shall be made prior to the inauguration of service. 6.7.3 Such security deposit may not exceed two months' estimated billing. 6.7.4 The fact that a security deposit has been made in no way relieves Intermedia from complying with BellSouth’s 's regulations as to advance payments and the prompt payment of bills on presentation nor does it constitute a waiver or modification of the regular practices of BellSouth providing for the discontinuance of service for non-payment of any sums due BellSouth. 7.7.2 6.7.5 BellSouth reserves the right to increase the security deposit requirements when, in its sole judgment, circumstances so warrant and and/or gross monthly billing has increased beyond the level initially used to determine the security deposit. 7.7.3 6.7.6 In the event that Teligent Intermedia defaults on its account, service to Teligent Intermedia will be terminated and any security deposits held will be applied to its account. 7.7.4 6.7.7 Interest on a security deposit shall accrue and be paid in accordance with the terms in the appropriate BellSouth tariff. 7.8 Orders 6.8 BellSouth shall provide to switch services “as is” shall be treated as a Intermedia notification of an end user’s change of service local exchange providers in the same manner and shalltime frame it provides such notice to its own retail operations.

Establishment of Service. 7.1 6.1 After receiving certification as a Local Exchange Company local exchange company from the appropriate regulatory agency, unless it has already done so, Teligent ICG will provide the appropriate BellSouth service center the necessary documentation to enable BellSouth to establish a master account for TeligentICG’s resold services. Such documentation shall include the Application for Master Account, proof of authority to provide telecommunications services, an Operating Company Number ("OCN") assigned by the National Exchange Carriers Association ("NECA") and a tax exemption certificate, if applicable. When necessary deposit requirements are met, BellSouth will begin taking orders for the resale of service. 7.2 6.2 Service orders will be in a standard format designated by BellSouth. All Local Service Requests (“LSRs”) submitted for products and services under this Attachment will be subject to the OSS charges set forth in the General Terms and Conditions of this Agreement. 7.3 6.3 When notification is received from Teligent ICG that a current End User end user of BellSouth will subscribe to TeligentICG’s service, standard service order intervals for the appropriate class of service will apply. 7.4 6.4 BellSouth will not require End User end user confirmation prior to establishing service for TeligentICG’s End User end user customer. Teligent ICG must, however, be able to demonstrate End User end user authorization upon request. 7.5 Teligent 6.5 ICG will be the single point of contact with BellSouth for all subsequent ordering activity resulting in additions or changes to resold services except that BellSouth will accept a request directly from the End User end user for conversion of the End Userend user's service from Teligent ICG to BellSouth or will accept a request from another CLEC for conversion of the End Userend user's service from Teligent ICG to the other LEC. BellSouth will notify Teligent within five (5) business days via US mail ICG that such a request has been processed. 7.6 6.6 If BellSouth determines that an unauthorized change in local service to Teligent ICG has occurred, BellSouth will reestablish service with the appropriate local service provider and will assess Teligent ICG as the CLEC initiating the unauthorized change, the unauthorized change charge described in BellSouth FCC. FCC Tariff No. 1, Section 13 or applicable state tariff. Appropriate nonrecurring charges, as set forth in Section A4 of the General Subscriber Service Tariff, will also be assessed to TeligentICG. These charges will can be refunded adjusted if Teligent ICG provides satisfactory proof of authorization. 7.7 6.7 In order to safeguard its interest, BellSouth reserves the right to secure the account with a suitable form of security deposit, unless satisfactory credit has already been established. 6.7.1 Such security deposit not shall take the form of an irrevocable Letter of Credit or other forms of security acceptable to exceed two (2) estimated months billingBellSouth. Any such security deposit may be held during the continuance of the service as security for the payment of any and all amounts accruing for the service. 7.7.1 6.7.2 If a security deposit is required, such security deposit shall be made prior to the inauguration of service. 6.7.3 Such security deposit may not exceed two months' estimated billing. 6.7.4 The fact that a security deposit has been made in no way relieves ICG from complying with BellSouth’s 's regulations as to advance payments and the prompt payment of bills on presentation nor does it constitute a waiver or modification of the regular practices of BellSouth providing for the discontinuance of service for non-payment of any sums due BellSouth. 7.7.2 6.7.5 BellSouth reserves the right to increase the security deposit requirements when, in its sole judgment, circumstances so warrant and and/or gross monthly billing has increased beyond the level initially used to determine the security deposit. 7.7.3 6.7.6 In the event that Teligent ICG defaults on its account, service to Teligent ICG will be terminated and any security deposits held will be applied to its account. 7.7.4 6.7.7 Interest on a security deposit shall accrue and be paid in accordance with the terms in the appropriate BellSouth tariff. 7.8 Orders to switch services “as is” shall be treated as a change of service and shall

Establishment of Service. 7.1 A. After receiving certification as a Local Exchange Company local exchange company from the appropriate regulatory agency, unless it has already done so, Teligent CBLD will provide the appropriate BellSouth Company service center the necessary documentation to enable BellSouth the Company to establish a master account for Teligent’s resold servicesCBLD. Such documentation shall include the Application for Master Account, proof of authority to provide telecommunications services, an Operating Company Number ("OCN") assigned by the National Exchange Carriers Association ("NECA") and a tax exemption certificate, if applicable. When necessary deposit requirements are met, BellSouth the Company will begin taking orders for the resale of service. 7.2 B. Service orders will be in a standard format designated by BellSouth. All Local Service Requests (“LSRs”) submitted for products and services under this Attachment will be subject to the OSS charges set forth in the General Terms and Conditions of this AgreementCompany. 7.3 C. When notification is received from Teligent CBLD that a current End User customer of BellSouth the Company will subscribe to TeligentCBLD’s service, standard service order intervals for the appropriate class of service will apply. 7.4 BellSouth D. The Company will not require End User end user confirmation prior to establishing service for TeligentCBLD’s End User end user customer. Teligent CBLD must, however, be able to demonstrate End User end user authorization upon request. 7.5 Teligent E. CBLD will be the single point of contact with BellSouth the Company for all subsequent ordering activity resulting in additions or changes to resold services except that BellSouth the Company will accept a request directly from the End User end user for conversion of the End Userend user's service from Teligent CBLD to BellSouth the Company or will accept a request from another CLEC OLEC for conversion of the End Userend user's service from Teligent CBLD to the other LEC. BellSouth The Company will notify Teligent within five (5) business days via US mail CBLD that such a request has been processed. 7.6 F. If BellSouth the Company determines that an unauthorized change in local service to Teligent CBLD has occurred, BellSouth the Company will reestablish service with the appropriate local service provider and will assess Teligent CBLD as the CLEC OLEC initiating the unauthorized change, the unauthorized change charge described in BellSouth FCC. F.C.C. Tariff No. 1, Section 13 or applicable state tariff13. Appropriate nonrecurring charges, as set forth in Section A4 A4. of the General Subscriber Service Tariff, will also be assessed to TeligentCBLD. These charges will can be refunded adjusted if Teligent CBLD provides satisfactory proof of authorization. 7.7 BellSouth G. In order to safeguard its interest, the Company reserves the right to secure the account with a suitable form of security deposit, unless satisfactory credit has already been established. 1. Such security deposit not shall take the form of an irrevocable Letter of Credit or other forms of security acceptable to exceed two (2) estimated months billingthe Company. Any such security deposit may be held during the continuance of the service as security for the payment of any and all amounts accruing for the service. 7.7.1 2. If a security deposit is required, such security deposit shall be made prior to the inauguration of service. 3. Such security deposit may not exceed two months’ estimated billing. 4. The fact that a security deposit has been made in no way relieves CBLD from complying with BellSouththe Company’s regulations as to advance payments and the prompt payment of bills on presentation nor does it constitute a waiver or modification of the regular practices of BellSouth the Company providing for the discontinuance of service for non-payment of any sums due BellSouththe Company. 7.7.2 BellSouth 5. The Company reserves the right to increase the security deposit requirements when, in its sole judgment, circumstances so warrant and and/or gross monthly billing has increased beyond the level initially used to determine the security deposit. 7.7.3 6. In the event that Teligent CBLD defaults on its account, service to Teligent CBLD will be terminated and any any 7. In the case of a cash deposit, interest at a rate as set forth in the appropriate BellSouth tariff shall be paid to CBLD during the continuance of the security deposits held will be applied to its account. 7.7.4 deposit. Interest on a security deposit shall accrue and be paid in accordance with the terms in the appropriate BellSouth tariff. 7.8 Orders to switch services “as is” annually and, if requested, shall be treated as a change of service and shallannually credited to CBLD by the accrual date.

Establishment of Service. 7.1 A. After receiving certification as a Local Exchange Company local exchange company from the appropriate regulatory agency, unless it has already done so, Teligent Reseller will provide the appropriate BellSouth Company service center the necessary documentation to enable BellSouth the Company to establish a master account for Teligent’s resold servicesReseller. Such documentation shall include the Application for Master Account, proof of authority to provide telecommunications services, an Operating Company Number ("OCN") assigned by the National Exchange Carriers Association ("NECA") and a tax exemption certificate, if applicable. When necessary deposit requirements are met, BellSouth the Company will begin taking orders for the resale of service. 7.2 B. Service orders will be in a standard format designated by BellSouth. All Local Service Requests (“LSRs”) submitted for products and services under this Attachment will be subject to the OSS charges set forth in the General Terms and Conditions of this AgreementCompany. 7.3 C. When notification is received from Teligent Reseller that a current End User customer of BellSouth the Company will subscribe to TeligentReseller’s service, standard service order intervals for the appropriate class of service will apply. 7.4 BellSouth D. The Company will not require End User end-user confirmation prior to establishing service for TeligentReseller’s End User end-user customer. Teligent Reseller must, however, be able to demonstrate End User end-user authorization upon request. 7.5 Teligent E. Reseller will be the single point of contact with BellSouth the Company for all subsequent ordering activity resulting in additions or changes to resold services except that BellSouth the Company will accept a request directly from the End User end user for conversion of the End Userend user's service from Teligent Reseller to BellSouth the Company or will accept a request from another CLEC for conversion of the End Userend user's service from Teligent Reseller to the other LEC. BellSouth The Company will notify Teligent within five (5) business days via US mail Reseller that such a request has been processed. 7.6 F. If BellSouth the Company determines that an unauthorized change in local service to Teligent Reseller has occurred, BellSouth the Company will reestablish service with the appropriate local service provider and will assess Teligent Reseller as the CLEC initiating the unauthorized change, the unauthorized change charge described in BellSouth FCC. F.C.C. Tariff No. 1, Section 13 or applicable state tariff. Appropriate nonrecurring charges, as set forth in Section A4 A4. of the General Subscriber Service Services Tariff, will also be assessed to TeligentReseller. These charges will can be refunded adjusted if Teligent Reseller provides satisfactory proof of authorization. 7.7 BellSouth G. In order to safeguard its interest, the Company reserves the right to secure the account with a suitable form of security deposit, unless satisfactory credit has already been established. 1. Such security deposit not shall take the form of an irrevocable Letter of Credit or other forms of security acceptable to exceed two (2) estimated months billingthe Company. Any such security deposit may be held during the continuance of the service as security for the payment of any and all amounts accruing for the service. 7.7.1 2. If a security deposit is required, such security deposit shall be made prior to the inauguration of service. 3. Such security deposit may not exceed two months' estimated billing. 4. The fact that a security deposit has been made in no way relieves Reseller from complying with BellSouththe Company’s regulations as to advance payments and the prompt payment of bills on presentation nor does it constitute a waiver or modification of the regular practices of BellSouth the Company providing for the discontinuance of service for non-payment of any sums due BellSouththe Company. 7.7.2 BellSouth 5. The Company reserves the right to increase the security deposit requirements when, in its sole judgment, circumstances so warrant and and/or gross monthly billing has increased beyond the level initially used to determine the security deposit. 7.7.3 6. In the event that Teligent Reseller defaults on its account, service to Teligent Reseller will be terminated and any security deposits held will be applied to its account. 7.7.4 7. Interest on a security deposit shall accrue and be paid refunded in accordance with the terms in the appropriate BellSouth tariff. 7.8 Orders to switch services “as is” shall be treated as a change of service and shall

Establishment of Service. 7.1 After receiving certification as a Local Exchange Company from the appropriate regulatory agency, unless it has already done so, Teligent PaeTec will provide the appropriate BellSouth service center the necessary documentation to enable BellSouth to establish a master account for TeligentPaeTec’s resold services. Such documentation shall include the Application for Master Account, proof of authority to provide telecommunications services, an Operating Company Number ("OCN") assigned by the National Exchange Carriers Association ("NECA") and a tax exemption certificate, if applicable. When necessary deposit requirements are met, BellSouth will begin taking orders for the resale of service. 7.2 Service orders will be in a standard format designated by BellSouth. All Local Service Requests (“LSRs”) submitted for products and services under this Attachment will be subject to the OSS charges set forth in the General Terms and Conditions of this Agreement. 7.3 When notification is received from Teligent PaeTec that a current End User of BellSouth will subscribe to TeligentPaeTec’s service, standard service order intervals for the appropriate class of service will apply. 7.4 BellSouth will not require End User confirmation prior to establishing service for TeligentPaeTec’s End User customer. Teligent PaeTec must, however, be able to demonstrate End User authorization upon request. 7.5 Teligent PaeTec will be the single point of contact with BellSouth for all subsequent ordering activity resulting in additions or changes to resold services except that BellSouth will accept a request directly from the End User for conversion of the End User's service from Teligent PaeTec to BellSouth or will accept a request from another CLEC for conversion of the End User's service from Teligent PaeTec to the other LEC. BellSouth will notify Teligent PaeTec within five (5) business days via US mail that such a request has been processed. 7.6 If BellSouth determines is informed that an unauthorized change in local service to Teligent PaeTec has occurred, BellSouth will reestablish service with the appropriate local service provider and will assess Teligent PaeTec as the CLEC initiating the alleged unauthorized change, the unauthorized change charge described in BellSouth FCC. FCC Tariff No. 1, Section 13 or applicable state tariff. Appropriate nonrecurring charges, as set forth in Section A4 of the General Subscriber Service Tariff, will also be assessed to TeligentPaeTec. These charges In accordance with FCC Slamming Liability Rules, the relevant governmental agency will determine if an unauthorized change has occurred. Resolution of all relevant issues shall be refunded if Teligent provides satisfactory proof of authorizationhandled directly with the authorized CLEC and PaeTec. 7.7 BellSouth reserves the right to secure a deposit not to exceed two (2) estimated months billing. Any such security deposit may be held during the continuance of the service as security for the payment of any and all amounts accruing for the service. 7.7.1 The fact that a security deposit has been made in no way relieves from complying with BellSouth’s regulations as to advance payments and the prompt payment of bills on presentation nor does it constitute a waiver or modification of the regular practices of BellSouth providing for the discontinuance of service for non-payment of any sums due BellSouth. 7.7.2 BellSouth reserves the right to increase the security deposit requirements when, in its sole judgment, circumstances so warrant and gross monthly billing has increased beyond the level initially used to determine the security deposit. 7.7.3 In the event that Teligent PaeTec defaults on its account, service to Teligent PaeTec will be terminated and any security deposits held will be applied to its account. 7.7.4 Interest on a security deposit shall accrue and be paid in accordance with the terms in the appropriate BellSouth tariff. 7.8 Orders to switch services “as is” shall be treated as a change of service and shall 7.9 BellSouth shall provide PaeTec notification of disconnects, updated and delivered once daily, via an electronic process known as OUTPLOC.

Establishment of Service. 7.1 6.1 After receiving certification as a Local Exchange Company local exchange company from the appropriate regulatory agency, unless it has already done so, Teligent Community will provide the appropriate BellSouth service center the necessary documentation to enable BellSouth to establish a master account for TeligentCommunity’s resold services. Such documentation shall include the Application for Master Account, proof of authority to provide telecommunications services, an Operating Company Number ("OCN") assigned by the National Exchange Carriers Association ("NECA") and a tax exemption certificate, if applicable. When necessary deposit requirements are met, BellSouth will begin taking orders for the resale of service. 7.2 6.2 Service orders will be in a standard format designated by BellSouth. All Local Service Requests (“LSRs”) submitted for products and services under this Attachment will be subject to the OSS charges set forth in the General Terms and Conditions of this Agreement. 7.3 6.3 When notification is received from Teligent Community that a current End User end user of BellSouth will subscribe to TeligentCommunity’s service, standard service order intervals for the appropriate class of service will apply. 7.4 6.4 BellSouth will not require End User end user confirmation prior to establishing service for TeligentCommunity’s End User end user customer. Teligent Community must, however, be able to demonstrate End User end user authorization upon request. 7.5 Teligent 6.5 Community will be the single point of contact with BellSouth for all subsequent ordering activity resulting in additions or changes to resold services except that BellSouth will accept a request directly from the End User end user for conversion of the End Userend user's service from Teligent Community to BellSouth or will accept a request from another CLEC for conversion of the End Userend user's service from Teligent Community to the other LEC. BellSouth will notify Teligent within five (5) business days via US mail Community that such a request has been processed. 7.6 6.6 If BellSouth determines that an unauthorized change in local service to Teligent Community has occurred, BellSouth will reestablish service with the appropriate local service provider and will assess Teligent Community as the CLEC initiating the unauthorized change, the unauthorized change charge described in BellSouth FCC. F.C.C. Tariff No. 1, Section 13 or applicable state tariff. Appropriate nonrecurring charges, as set forth in Section A4 of the General Subscriber Service Tariff, will also be assessed to TeligentCommunity. These charges will can be refunded adjusted if Teligent Community provides satisfactory proof of authorization. 7.7 6.7 In order to safeguard its interest, BellSouth reserves the right to secure the account with a suitable form of security deposit, unless satisfactory credit has already been established. 6.7.1 Such security deposit not shall take the form of an irrevocable Letter of Credit or other forms of security acceptable to exceed two (2) estimated months billingBellSouth. Any such security deposit may be held during the continuance of the service as security for the payment of any and all amounts accruing for the service. 7.7.1 6.7.2 If a security deposit is required, such security deposit shall be made prior to the inauguration of service. 6.7.3 Such security deposit may not exceed two months' estimated billing. 6.7.4 The fact that a security deposit has been made in no way relieves Community from complying with BellSouth’s 's regulations as to advance payments and the prompt payment of bills on presentation nor does it constitute a waiver or modification of the regular practices of BellSouth providing for the discontinuance of service for non-non- payment of any sums due BellSouth. 7.7.2 6.7.5 BellSouth reserves the right to increase the security deposit requirements when, in its sole judgment, circumstances so warrant and and/or gross monthly billing has increased beyond the level initially used to determine the security deposit. 7.7.3 6.7.6 In the event that Teligent Community defaults on its account, service to Teligent Community will be terminated and any security deposits held will be applied to its account. 7.7.4 6.7.7 Interest on a security deposit shall accrue and be paid in accordance with the terms in the appropriate BellSouth tariff. 7.8 Orders to switch services “as is” shall be treated as a change of service and shall

Establishment of Service. 7.1 6.1 After receiving certification as a Local Exchange Company local exchange company from the appropriate regulatory agency, unless it has already done so, Teligent Express will provide the appropriate BellSouth service center the necessary documentation to enable BellSouth to establish a master account for TeligentExpress’s resold services. Such documentation shall include the Application for Master Account, proof of authority to provide telecommunications services, an Operating Company Number ("OCN") assigned by the National Exchange Carriers Association ("NECA") and a tax exemption certificate, if applicable. When necessary deposit requirements are met, BellSouth will begin taking orders for the resale of service. 7.2 6.2 Service orders will be in a standard format designated by BellSouth. All Local Service Requests (“LSRs”) submitted for products and services under this Attachment will be subject to the OSS charges set forth in the General Terms and Conditions of this Agreement. 7.3 6.3 When notification is received from Teligent Express that a current End User end user of BellSouth will subscribe to TeligentExpress’s service, standard service order intervals for the appropriate class of service will apply. 7.4 6.4 BellSouth will not require End User end user confirmation prior to establishing service for TeligentExpress’s End User end user customer. Teligent Express must, however, be able to demonstrate End User end user authorization upon request. 7.5 Teligent 6.5 Express will be the single point of contact with BellSouth for all subsequent ordering activity resulting in additions or changes to resold services except that BellSouth will accept a request directly from the End User end user for conversion of the End Userend user's service from Teligent Express to BellSouth or will accept a request from another CLEC for conversion of the End Userend user's service from Teligent Express to the other LEC. BellSouth will notify Teligent within five (5) business days via US mail Express that such a request has been processed. 7.6 6.6 If BellSouth determines that an unauthorized change in local service to Teligent Express has occurred, BellSouth will reestablish service with the appropriate local service provider and will assess Teligent Express as the CLEC initiating the unauthorized change, the unauthorized change charge described in BellSouth FCC. F.C.C. Tariff No. 1, Section 13 or applicable state tariff. Appropriate nonrecurring charges, as set forth in Section A4 of the General Subscriber Service Tariff, will also be assessed to TeligentExpress. These charges will can be refunded adjusted if Teligent Express provides satisfactory proof of authorization. 7.7 6.7 In order to safeguard its interest, BellSouth reserves the right to secure the account with a suitable form of security deposit, unless satisfactory credit has already been established. 6.7.1 Such security deposit not shall take the form of an irrevocable Letter of Credit or other forms of security acceptable to exceed two (2) estimated months billingBellSouth. Any such security deposit may be held during the continuance of the service as security for the payment of any and all amounts accruing for the service. 7.7.1 6.7.2 If a security deposit is required, such security deposit shall be made prior to the inauguration of service. 6.7.3 Such security deposit may not exceed two months' estimated billing. 6.7.4 The fact that a security deposit has been made in no way relieves Express from complying with BellSouth’s 's regulations as to advance payments and the prompt payment of bills on presentation nor does it constitute a waiver or modification of the regular practices of BellSouth providing for the discontinuance of service for non-payment of any sums due BellSouth. 7.7.2 6.7.5 BellSouth reserves the right to increase the security deposit requirements when, in its sole judgment, circumstances so warrant and and/or gross monthly billing has increased beyond the level initially used to determine the security deposit. 7.7.3 6.7.6 In the event that Teligent Express defaults on its account, service to Teligent Express will be terminated and any security deposits held will be applied to its account. 7.7.4 6.7.7 Interest on a security deposit shall accrue and be paid in accordance with the terms in the appropriate BellSouth tariff. 7.8 Orders to switch services “as is” shall be treated as a change of service and shall

Establishment of Service. 7.1 6.1 After receiving certification as a Local Exchange Company local exchange company from the appropriate regulatory agency, unless it has already done so, Teligent ICG will provide the appropriate BellSouth service center the necessary documentation to enable BellSouth to establish a master account for TeligentICG’s resold services. Such documentation shall include the Application for Master Account, proof of authority to provide telecommunications services, an Operating Company Number ("OCN") assigned by the National Exchange Carriers Association ("NECA") and a tax exemption certificate, if applicable. When necessary deposit requirements are met, BellSouth will begin taking orders for the resale of service. 7.2 6.2 Service orders will be in a standard format designated by BellSouth. All Local Service Requests (“LSRs”) submitted for products and services under this Attachment will be subject to the OSS charges set forth in the General Terms and Conditions of this Agreement. 7.3 6.3 When notification is received from Teligent ICG that a current End User end user of BellSouth will subscribe to TeligentICG’s service, standard service order intervals for the appropriate class of service will apply. 7.4 6.4 BellSouth will not require End User end user confirmation prior to establishing service for TeligentICG’s End User end user customer. Teligent ICG must, however, be able to demonstrate End User end user authorization upon request. 7.5 Teligent 6.5 ICG will be the single point of contact with BellSouth for all subsequent ordering activity resulting in additions or changes to resold services except that BellSouth will accept a request directly from the End User end user for conversion of the End Userend user's service from Teligent ICG to BellSouth or will accept a request from another CLEC for conversion of the End Userend user's service from Teligent ICG to the other LEC. BellSouth will notify Teligent within five (5) business days via US mail ICG that such a request has been processed. 7.6 6.6 If BellSouth determines that an unauthorized change in local service to Teligent ICG has occurred, BellSouth will reestablish service with the appropriate local service provider and will assess Teligent ICG as the CLEC initiating the unauthorized change, the unauthorized change charge described in BellSouth FCC. FCC Tariff No. 1, Section 13 or applicable state tariff. Appropriate nonrecurring charges, as set forth in Section A4 of the General Subscriber Service Tariff, will also be assessed to TeligentICG. These charges will can be refunded adjusted if Teligent ICG provides satisfactory proof of authorization. 7.7 6.7 In order to safeguard its interest, BellSouth reserves the right to secure the account with a suitable form of security deposit, unless satisfactory credit has already been established. 6.7.1 Such security deposit not shall take the form of an irrevocable Letter of Credit or other forms of security acceptable to exceed two (2) estimated months billingBellSouth. Any such security deposit may be held during the continuance of the service as security for the payment of any and all amounts accruing for the service. 7.7.1 6.7.2 If a security deposit is required, such security deposit shall be made prior to the inauguration of service. 6.7.3 Such security deposit may not exceed two months' estimated billing. 6.7.4 The fact that a security deposit has been made in no way relieves ICG from complying with BellSouth’s 's regulations as to advance payments and the prompt payment of bills on presentation nor does it constitute a waiver or modification of the regular practices of BellSouth providing for the discontinuance of service for non-non- payment of any sums due BellSouth. 7.7.2 6.7.5 BellSouth reserves the right to increase the security deposit requirements when, in its sole judgment, circumstances so warrant and and/or gross monthly billing has increased beyond the level initially used to determine the security deposit. 7.7.3 6.7.6 In the event that Teligent ICG defaults on its account, service to Teligent ICG will be terminated and any security deposits held will be applied to its account. 7.7.4 6.7.7 Interest on a security deposit shall accrue and be paid in accordance with the terms in the appropriate BellSouth tariff. 7.8 Orders to switch services “as is” shall be treated as a change of service and shall

Establishment of Service. 7.1 6.1 After receiving certification as a Local Exchange Company local exchange company from the appropriate regulatory agency, unless it has already done so, Teligent PowerNet will provide the appropriate BellSouth service center the necessary documentation to enable BellSouth to establish a master account for TeligentPowerNet’s resold services. Such documentation shall include the Application for Master Account, proof of authority to provide telecommunications services, an Operating Company Number ("OCN") assigned by the National Exchange Carriers Association ("NECA") and a tax exemption certificate, if applicable. When necessary deposit requirements are met, as described in Section 6.6 below, BellSouth will begin taking orders for the resale of service. 7.2 6.2 Service orders will be in a standard format designated by BellSouth. All Local Service Requests (“LSRs”) submitted for products and services under this Attachment will be subject to the OSS charges set forth in the General Terms and Conditions of this Agreement. 7.3 When notification is received from Teligent 6.3 PowerNet shall provide to BellSouth a blanket letter of authorization ("LOA") certifying that a current PowerNet will have End User of BellSouth will subscribe authorization prior to Teligent’s viewing the End User's customer service record or switching the End User's service, standard service order intervals for the appropriate class of service will apply. 7.4 . BellSouth will not require End User confirmation prior to establishing service for TeligentPowerNet’s End User customer. Teligent PowerNet must, however, be able to demonstrate End User authorization upon request. 7.5 Teligent will be the single point of contact with BellSouth for all subsequent ordering activity resulting in additions or changes to resold services except that 6.4 BellSouth will accept a request directly from the End User for conversion of the End User's service from Teligent PowerNet to BellSouth or will accept a request from another CLEC for conversion of the End User's service from Teligent PowerNet to such other CLEC. Upon completion of the other LEC. conversion BellSouth will notify Teligent within five (5) business days via US mail PowerNet that such a request conversion has been processedcompleted. 7.6 6.5 If BellSouth determines is informed that an unauthorized change in local service to Teligent PowerNet has occurred, BellSouth will reestablish service with the appropriate local service provider and will assess Teligent PowerNet as the CLEC initiating the alleged unauthorized change, the unauthorized change charge described in BellSouth FCC. FCC Tariff No. 1, Section 13 or applicable state tariff. Appropriate nonrecurring charges, as set forth in Section A4 of the General Subscriber Service Tariff, will also be assessed to TeligentPowerNet. These charges In accordance with FCC Slamming Liability Rules, the relevant governmental agency will determine if an unauthorized change has occurred. Resolution of all relevant issues shall be refunded if Teligent provides satisfactory proof of authorizationhandled directly with the authorized CLEC and PowerNet. 7.7 6.6 BellSouth reserves the right to secure the account with a suitable form of security deposit, unless satisfactory credit has already been established. 6.6.1 Such security deposit not shall take the form of cash for cash equivalent, an irrevocable Letter of Credit or other forms of security acceptable to exceed two (2) estimated months billingBellSouth. Any such security deposit may be held during the continuance of the service as security for the payment of any and all amounts accruing for the service. 7.7.1 6.6.2 If a security deposit is required, such security deposit shall be made prior to the inauguration of service. 6.6.3 Such security deposit shall be two months' estimated billing. 6.6.4 The fact that a security deposit has been made in no way relieves PowerNet from complying with BellSouth’s 's regulations as to advance payments and the prompt payment of bills on presentation nor does it constitute a waiver or modification of the regular practices of BellSouth providing for the discontinuance of service for non-payment of any sums due BellSouth. 7.7.2 6.6.5 BellSouth reserves the right to increase the security deposit requirements when, in its sole reasonable judgment, circumstances changes in PowerNet's financial status so warrant and and/or gross monthly billing has increased beyond the level initially used to determine the security deposit. 7.7.3 6.6.6 In the event that Teligent defaults service to PowerNet is terminated due to PowerNet's default on its account, service to Teligent will be terminated and any security deposits held will be applied to its PowerNet's account. 7.7.4 Interest on a security deposit shall accrue and be paid in accordance with the terms in the appropriate BellSouth tariff. 7.8 Orders to switch services “as is” shall be treated as a change of service and shall

Establishment of Service. 7.1 After receiving certification as a Local Exchange Company from the appropriate regulatory agency, unless it has already done so, Teligent 9.1 SBCT will provide the appropriate BellSouth service center the necessary documentation to enable BellSouth to establish a master account for TeligentSBCT’s resold services. Such documentation shall include the Application for Master Account, proof of authority to provide telecommunications servicesTelecommunications Services, an Operating Company Number ("OCN") assigned by the National Exchange Carriers Association ("NECA") and a tax exemption certificate, if applicable. When necessary deposit requirements are met, as described in Section 9.6 below, BellSouth will begin taking orders for the resale of service. 7.2 9.2 Service orders will be in a standard format designated by BellSouth. All Local Service Requests (“LSRs”) submitted for products and services under this Attachment will be subject to the OSS charges set forth in the General Terms and Conditions of this Agreement. 7.3 When notification is received from Teligent 9.3 SBCT shall provide to BellSouth a blanket letter of authorization ("LOA") certifying that a current SBCT will have End User of BellSouth will subscribe authorization prior to Teligent’s viewing the End User's customer service record or switching the End User's service, standard service order intervals for the appropriate class of service will apply. 7.4 . BellSouth will not require End User confirmation prior to establishing service for TeligentSBCT’s End User customer. Teligent SBCT must, however, be able to demonstrate End User authorization upon request. 7.5 Teligent will be the single point of contact with BellSouth for all subsequent ordering activity resulting in additions or changes to resold services except that 9.4 BellSouth will accept a request directly from the End User for conversion of the End User's service from Teligent SBCT to BellSouth or will accept a request from another CLEC for conversion of the End User's service from Teligent SBCT to such other CLEC. Upon completion of the other LEC. conversion BellSouth will notify Teligent within five (5) business days via US mail SBCT that such a request conversion has been processedcompleted. 7.6 9.5 If BellSouth determines is informed that an unauthorized change in local service to Teligent SBCT has occurred, BellSouth will reestablish service with the appropriate local service provider and will assess Teligent SBCT as the CLEC initiating the unauthorized change, the unauthorized change charge described in BellSouth FCC. F.C.C. Tariff No. 1, Section 13 or applicable state tariff. Appropriate nonrecurring charges, as set forth in Section A4 of the General Subscriber Service Tariff, will also be assessed to TeligentSBCT. These charges In accordance with FCC Slamming Liability Rules, the relevant governmental agency will determine if an unauthorized change has occurred. Resolution of all relevant issues shall be refunded if Teligent provides satisfactory proof of authorizationhandled directly with the authorized CLEC and SBCT. 7.7 9.6 BellSouth reserves the right to secure the account with a suitable form of security deposit, unless satisfactory credit has already been established. 9.6.1 Such security deposit not shall take the form of cash for cash equivalent, an irrevocable Letter of Credit or other forms of security acceptable to exceed two (2) estimated months billingBellSouth. Any such security deposit may be held during the continuance of the service as security for the payment of any and all amounts accruing for the service. 7.7.1 9.6.2 If a security deposit is required, such security deposit shall be made prior to the inauguration of service. 9.6.3 Such security deposit shall be two months' estimated billing. 9.6.4 The fact that a security deposit has been made in no way relieves SBCT from complying with BellSouth’s 's regulations as to advance payments and the prompt payment of bills on presentation nor does it constitute a waiver or modification of the regular practices of BellSouth providing for the discontinuance of service for non-payment of any sums due BellSouth. 7.7.2 9.6.5 BellSouth reserves the right to increase the security deposit requirements when, in its sole reasonable judgment, circumstances changes in SBCT's financial status so warrant and and/or gross monthly billing has increased beyond the level initially used to determine the security deposit. 7.7.3 9.6.6 In the event that Teligent defaults service to SBCT is terminated due to SBCT's default on its account, service to Teligent will be terminated and any security deposits held will be applied to its SBCT's account. 7.7.4 Interest on a security deposit shall accrue and be paid in accordance with the terms in the appropriate BellSouth tariff. 7.8 Orders to switch services “as is” shall be treated as a change of service and shall

Establishment of Service. 7.1 6.1 After receiving certification as a Local Exchange Company local exchange carrier from the appropriate regulatory agency, unless it has already done so, Teligent InterCept will provide the appropriate BellSouth service center the necessary documentation to enable BellSouth to establish a master account for TeligentInterCept’s resold services. Such documentation shall include the Application for Master Account, proof of authority to provide telecommunications services, an Operating Company Number ("OCN") assigned by the National Exchange Carriers Association ("NECA") and a tax exemption certificate, if applicable. When necessary deposit requirements are met, BellSouth will begin taking orders for the resale of service. 7.2 6.2 Service orders will be in a standard format designated by BellSouth. All Local Service Requests (“LSRs”) submitted for products and services under this Attachment will be subject to the OSS charges set forth in the General Terms and Conditions of this Agreement. 7.3 6.3 When notification is received from Teligent InterCept that a current End User end user of BellSouth will subscribe to TeligentInterCept’s service, standard service order intervals for the appropriate class of service will apply. These intervals will be no less favorable to InterCept than those applied by BellSouth to service orders generated for BellSouth’s other CLEC customers in accordance with the performance intervals for CLEC interconnection and resale contracts. 7.4 6.4 BellSouth will not require End User end user confirmation prior to establishing service for TeligentInterCept’s End User end user customer. Teligent InterCept must, however, be able to demonstrate End User end user authorization upon request. 7.5 Teligent 6.5 InterCept will be the single point of contact with BellSouth for all subsequent ordering activity resulting in additions or changes to resold services except that BellSouth will accept a request directly from the End User end user for conversion of the End Userend user's service from Teligent InterCept to BellSouth or will accept a request from another CLEC for conversion of the End Userend user's service from Teligent InterCept to the other LEC. BellSouth will notify Teligent within five (5) business days via US mail InterCept that such a request has been processed. 7.6 6.6 If BellSouth determines that an unauthorized change in local service to Teligent InterCept has occurred, BellSouth will reestablish service with the appropriate local service provider and will assess Teligent InterCept as the CLEC initiating the unauthorized change, the unauthorized change charge described in BellSouth FCC. F.C.C. Tariff No. 1, Section 13 or applicable state tariff. Appropriate nonrecurring charges, as set forth in Section A4 A4. of the General Subscriber Service Tariff, will also be assessed to TeligentInterCept. These charges will can be refunded adjusted if Teligent InterCept provides reasonably satisfactory proof of authorization. 7.7 6.7 In order to safeguard its interest, BellSouth reserves the right to secure the account with a suitable form of security deposit, unless satisfactory credit has already been established. 6.7.1 Such security deposit not shall take the form of an irrevocable Letter of Credit or other forms of security reasonably acceptable to exceed two (2) estimated months billingBellSouth. Any such security deposit may be held during the continuance of the service as security for the payment of any and all amounts accruing for the service. 7.7.1 6.7.2 If a security deposit is required, such security deposit shall be made prior to the inauguration of service. 6.7.3 Such security deposit may not exceed two months' estimated billing. 6.7.4 The fact that a security deposit has been made in no way relieves InterCept from complying with BellSouth’s 's regulations as to advance payments and the prompt payment of bills on presentation nor does it constitute a waiver or modification of the regular practices of BellSouth BellSouth, as set forth in its tariff(s) and/or in this agreement, providing for the discontinuance of service for non-payment of any undisputed sums due BellSouth. 7.7.2 6.7.5 BellSouth reserves the right to increase the security deposit requirements when, in its sole judgment, circumstances so warrant and and/or gross monthly billing has increased beyond the level initially used to determine the security deposit. 7.7.3 6.7.6 In the event that Teligent InterCept defaults in payment of undisputed charges [see section 7.6.3.4 below] on its account, service to Teligent InterCept will be terminated in accordance with applicable provisions in the tariff and/or in this agreement and any security deposits held will be applied to its account. 7.7.4 6.7.7 Interest on a security deposit shall accrue and be paid in accordance with the terms in the appropriate BellSouth tariff. 7.8 Orders to switch services “as is” shall be treated as a change of service and shall

Establishment of Service. 7.1 6.1 After receiving certification as a Local Exchange Company local exchange company from the appropriate regulatory agency, unless it has already done so, Teligent ACCESS Integrated will provide the appropriate BellSouth service center the necessary documentation to enable BellSouth to establish a master account for TeligentACCESS Integrated’s resold services. Such documentation shall include the Application for Master Account, proof of authority to provide telecommunications services, an Operating Company Number ("OCN") assigned by the National Exchange Carriers Association ("NECA") and a tax exemption certificate, if applicable. When necessary deposit requirements are met, BellSouth will begin taking orders for the resale of service. 7.2 6.2 Service orders will be in a standard format designated by BellSouth. All Local Service Requests (“LSRs”) submitted for products and services under this Attachment will be subject to the OSS charges set forth in the General Terms and Conditions of this Agreement. 7.3 6.3 When notification is received from Teligent ACCESS Integrated that a current End User end user of BellSouth will subscribe to TeligentACCESS Integrated’s service, standard service order intervals for the appropriate class of service will apply. 7.4 6.4 BellSouth will not require End User end user confirmation prior to establishing service for TeligentACCESS Integrated’s End User end user customer. Teligent ACCESS Integrated must, however, be able to demonstrate End User end user authorization upon request. 7.5 Teligent 6.5 ACCESS Integrated will be the single point of contact with BellSouth for all subsequent ordering activity resulting in additions or changes to resold services except that BellSouth will accept a request directly from the End User end user for conversion of the End Userend user's service from Teligent ACCESS Integrated to BellSouth or will accept a request from another CLEC for conversion of the End Userend user's service from Teligent ACCESS Integrated to the other LECCLEC. BellSouth will notify Teligent within five (5) business days via US mail ACCESS Integrated that such a request has been processed. 7.6 6.6 If BellSouth determines that an unauthorized change in local service to Teligent ACCESS Integrated has occurred, BellSouth will reestablish service with the appropriate local service provider and will assess Teligent ACCESS Integrated as the CLEC initiating the unauthorized change, the unauthorized change charge described in BellSouth FCC. F.C.C. Tariff No. 1, Section 13 or applicable state tariff. Appropriate nonrecurring charges, as set forth in Section A4 A4. of the General Subscriber Service Tariff, will also be assessed to TeligentACCESS Integrated. These charges will can be refunded adjusted if Teligent ACCESS Integrated provides satisfactory proof of authorization. 7.7 6.7 In order to safeguard its interest, BellSouth reserves the right to secure the account with a suitable form of security deposit, unless satisfactory credit has already been established. 6.7.1 Such security deposit not shall take the form of an irrevocable Letter of Credit or other forms of security acceptable to exceed two (2) estimated months billingBellSouth. Any such security deposit may be held during the continuance of the service as security for the payment of any and all amounts accruing for the service. 7.7.1 6.7.2 If a security deposit is required, such security deposit shall be made prior to the inauguration of service. 6.7.3 Such security deposit may not exceed two months' estimated billing. 6.7.4 The fact that a security deposit has been made in no way relieves ACCESS Integrated from complying with BellSouth’s 's regulations as to advance payments and the prompt payment of bills on presentation nor does it constitute a waiver or modification of the regular practices of BellSouth providing for the discontinuance of service for non-non- payment of any sums due BellSouth. 7.7.2 6.7.5 BellSouth reserves the right to increase the security deposit requirements when, in its sole judgment, circumstances so warrant and and/or gross monthly billing has increased beyond the level initially used to determine the security deposit. 7.7.3 6.7.6 In the event that Teligent ACCESS Integrated defaults on its account, service to Teligent ACCESS Integrated will be terminated and any security deposits held will be applied to its account. 7.7.4 6.7.7 Interest on a security deposit shall accrue and be paid in accordance with the terms in the appropriate BellSouth tariff. 7.8 Orders to switch services “as is” shall be treated as a change of service and shall

Establishment of Service. 7.1 After receiving certification as a Local Exchange Company from the appropriate regulatory agency, unless it has already done so, Teligent Premiere will provide the appropriate BellSouth service center the necessary documentation to enable BellSouth to establish a master account for TeligentPremiere’s resold services. Such documentation shall include the Application for Master Account, proof of authority to provide telecommunications services, an Operating Company Number ("OCN") assigned by the National Exchange Carriers Association ("NECA") and a tax exemption certificate, if applicable. When necessary deposit requirements are met, BellSouth will begin taking orders for the resale of service. 7.2 Service orders will be in a standard format designated by BellSouth. All Local Service Requests (“LSRs”) submitted for products and services under this Attachment will be subject to the OSS charges set forth in the General Terms and Conditions of this Agreement. 7.3 When notification is received from Teligent Premiere that a current End User of BellSouth will subscribe to TeligentPremiere’s service, standard service order intervals for the appropriate class of service will apply. 7.4 BellSouth will not require End User confirmation prior to establishing service for TeligentPremiere’s End User customer. Teligent Premiere must, however, be able to demonstrate End User authorization upon request. 7.5 Teligent Premiere will be the single point of contact with BellSouth for all subsequent ordering activity resulting in additions or changes to resold services except that BellSouth will accept a request directly from the End User for conversion of the End User's service from Teligent Premiere to BellSouth or will accept a request from another CLEC for conversion of the End User's service from Teligent Premiere to the other LEC. BellSouth will notify Teligent Premiere within five (5) business days via US mail that such a request has been processed. 7.6 If BellSouth determines that an unauthorized change in local service to Teligent Premiere has occurred, BellSouth will reestablish service with the appropriate local service provider and will assess Teligent Premiere as the CLEC initiating the unauthorized change, the unauthorized change charge described in BellSouth FCC. Tariff No. 1, Section 13 or applicable state tariff. Appropriate nonrecurring charges, as set forth in Section A4 of the General Subscriber Service Tariff, will also be assessed to TeligentPremiere. These charges will be refunded if Teligent Premiere provides satisfactory proof of authorization. 7.7 BellSouth reserves the right to secure a deposit not to exceed two (2) estimated months billing. Any such security deposit may be held during the continuance of the service as security for the payment of any and all amounts accruing for the service. 7.7.1 The fact that a security deposit has been made in no way relieves from complying with BellSouth’s regulations as to advance payments and the prompt payment of bills on presentation nor does it constitute a waiver or modification of the regular practices of BellSouth providing for the discontinuance of service for non-payment of any sums due BellSouth. 7.7.2 BellSouth reserves the right to increase the security deposit requirements when, in its sole judgment, circumstances so warrant and gross monthly billing has increased beyond the level initially used to determine the security deposit. 7.7.3 In the event that Teligent Premiere defaults on its account, service to Teligent Premiere will be terminated and any security deposits held will be applied to its account. 7.7.4 Interest on a security deposit shall accrue and be paid in accordance with the terms in the appropriate BellSouth tariff. 7.8 Orders to switch services “as is” shall be treated as a change of service and shall