1. mismatch Is end-user porting all telephone numbers? New Service Provider notifies Old Service Provider of change using Local Service Request (LSR) Old Service Provider provides Firm Order Confirmation (FOC) to New Service Provider within 24 hours. Old and New Service Providers create and process service orders End-user Contact End-user agrees to change to New Service Provider New Service Provider obtains end-user Authorization New Service Provider notes “not all TNs being ported” in remarks field on LSR Old (optionally) and New Service Providers notify NPAC. NPAC performs data validation on each individual message. Did NPAC receive both and matching create messages within 9 business hours (t 1 )? Does NPAC receive create message within 9 business hours (t 2 )? Is create message missing from New or Old Service Provider? Did Old SP place order in Conflict? NPAC logs no response NPAC notifies appropriate Service Provider that create message is missing. NPAC notifies both Service Providers that transaction is cancelled and change is rejected. New Service Provider coordinates Physical changes with Old Service Provider yes no END timer expired match no match yes New Old INTER-SERVICE PROVIDER LNP OPERATIONS FLOWS - PROVISIONING - Is data valid? yes Return data to Service Provider Data corrected & forwarded no 4/25/97 NANC ISSUE 1.0 A Is the unconditional 10 digit trigger being used? no yes AA B 1 2 4 6 7 8 3 5 9 10 11 14 18 24 12 16 19 17 13 22 21 20 figure 1 NPAC notifies Old Service Provider that porting proceeds under control of the New Service Provider NPAC logs request to place order into Conflict including cause code. 23 25 BB NPAC notifies appropriate Service Provider that create message is mismatched. 15 26

2. NPAC SMS downloads (real time) to all Service Providers NPAC SMS records date and time in history file Old Service Provider removes translations in Central Office NPAC SMS logs failures and non-responses, and notifies Old and New Service Providers of failures New Service Provider activates its C.O. translations Old and New Service Providers make physical changes (where necessary) New Service Provider notifies NPAC to activate subscription A All Service Providers update routing data bases (real-time download). END INTER-SERVICE PROVIDER LNP OPERATIONS FLOWS - PROVISIONING WITHOUT UNCONDITIONAL 10-DIGIT TRIGGER - 4/25/97 NANC ISSUE 1.0 figure 2 1 2 3 4 5 6 7 8 New Service Provider may verify completion 9 10

3. NPAC SMS downloads (real time) to all Service Providers NPAC SMS records date & time in history file NPAC SMS logs failures and non-responses, and notifies Old and New Service Providers of failures Old and New Service Providers make Physical Changes (where necessary) New Service Provider notifies NPAC to activate subscription All Service Providers update routing data bases (real-time download) New Service Provider may verify completion END 4/25/97 NANC ISSUE 1.0 AA Old Service Provider activates unconditional 10 digit trigger in Central Office figure 3 1 New Service Provider activates C.O. translations. 2 3 4 5 6 7 8 10 11 INTER-SERVICE PROVIDER LNP OPERATIONS FLOWS - PROVISIONING WITH UNCONDITIONAL 10-DIGIT TRIGGER - Old Service Provider removes appropriate translations. 9

4. New Service Provider contacts the Old Service Provider to resolve Conflict. If no agreement is reached, begin normal escalation. no Was conflict resolved within 30 calendar days ? yes 4/25/97 NANC ISSUE 1.0 figure 4 Cancel Orders How was Conflict resolved? B 7 9 First time into conflict? yes NPAC rejects conflict request. 6 NPAC initiates cancellation and notifies both Service Providers 2 Is Conflict initiated prior to noon the business day before Due Date? no yes 3 5 NPAC changes the subscription to Conflict Status and notifies both Service Providers 4 8 END NPAC notifies both Service Providers of conflict off via SOA 10 “Timeout” If conflict was resolved within 6 business hours, only the Old Service Provider may notify NPAC of “conflict off”. If conflict was resolved after 6 business hours, either New or Old Service Provider may notify NPAC of “conflict off”. 11 Revert to porting process BB INTER-SERVICE PROVIDER LNP OPERATIONS FLOWS - CONFLICT FLOW FOR THE SERVICE CREATION PROVISIONING PROCESS - C BB 12

5. End-user Did end-user contact Old or New Service Provider? Old Service Provider obtains end-user authorization Old Service Provider sends notification to New Service Provider sends LSR to Old Provider noting cancellation as soon as possible prior to activation time. New Service Provider sends notification of cancellation to NPAC if appropriate. Old New Old Service Provider sends cancellation to NPAC, if appropriate. ) Did NPAC receive notification(s) within 9 business hours NPAC logs information, cancels subscription, and notifies both Service Providers of cancellation END Does NPAC receive concurring notification within 9 business hours? NPAC notifies appropriate Service Provider that information is missing. no yes F F 4/25/97 NANC ISSUE 1.0 figure 5 1 2 3 4 6 7 9 5 8 10 11 C H INTER-SERVICE PROVIDER LNP OPERATIONS FLOWS - CANCELLATION FLOW FOR PROVISIONING PROCESS - no 12

6. Old NPAC logs information, place subscription in “conflict status” with proper conflict cause code and notifies both Service Providers. H Is Old or New Service Provider cancellation notification missing or inaccurate? NPAC logs information, cancels subscription, and notifies both Service Providers of cancellation with proper cause code New Service Provider notifies NPAC to cancel subscription NPAC logs information, cancels subscription, and notifies both Service Providers of cancellation END How does New Service Provider wish to continue? NPAC waits for 30 calendar days, cancels subscription, and notifies both Service Providers of timeout New Service Provider notifies NPAC to remove subscription from Conflict Status NPAC notifies both Service Providers of conflict off via SOA BB Cancel Subscription Ignore Revert to Pending (Proceed with porting process) New 4/25/97 NANC ISSUE 1.0 figure 6 1 2 8 7 10 6 5 4 3 9 INTER-SERVICE PROVIDER LNP OPERATIONS FLOWS - CANCELLATION CONFLICT FLOW FOR PROVISIONING PROCESS -

7. Current Service Provider arranges intercept treatment. Current Service Provider creates and processes service order. NPAC broadcasts subscription deletion to all applicable Service Providers NPAC deletes telephone number from its active database on effective release date. END 4/25/97 NANC ISSUE 1.0 figure 7 End-user 1 4 6 9 Current Service Provider initiated disconnect. 2 Current Service Provider notifies NPAC of disconnect date and indicates effective release date. 5 3 NPAC notifies NPA/NXX owner/holder of the disconnected telephone number(s), effective release and disconnect dates 7 8 INTER-SERVICE PROVIDER LNP OPERATIONS FLOWS - DISCONNECT PROCESS FOR PORTED TELEPHONE NUMBERS -

8. INTER-SERVICE PROVIDER LNP OPERATIONS FLOWS - AUDIT PROCESS - 4/25/97 NANC ISSUE 1.0 Service Provider requests NPAC for audit 1 NPAC SMS issues queries to appropriate LSMSs 2 NPAC SMS compares own Subscription Version to LSMS Subscription Version 3 NPAC SMS updates appropriate LSMS with Subscription Version updates 4 All audits completed ? 5 figure 8 NPAC reports audit completion to requesting Service Provider 6 END 7 No Yes

9. INTER-SERVICE PROVIDER LNP OPERATIONS FLOWS - CODE OPENING PROCESSES- 4/25/97 NANC ISSUE 1.0 NPA-NXX Code Opening NPA-NXX holder notifies NPAC/SMS of NPA-NXX Code(s) being opened for porting 1 NPAC SMS updates its NPA-NXX databases 2 NPAC SMS sends notification of code opening to all Service Providers via LSMS 3 First TN Ported in NPA-NXX NPAC SMS receives subscription Create request for first TN in NPA-NXX 1 NPAC SMS sends notification of first TN ported to all Service Providers via SOA and LSMS 2 figure 9