AT&T Voice Over IP Connect Service (“AVOICS”)

1. AT&T Voice Over IP Connect Service (“AVOICS”)

2. Outline • Service Description (Summary) • Supported Call Types • AVOICS • Connectivity Options • Service Elements • Network Architecture • Pricing Structure Overview • Customer Responsibilities • Customer Care & Billing • The AT&T Value • Next Steps

3. AT&T Voice Over IP Connect Service (“AVOICS”) Summary Service Description • The AT&T Voice Over IP Connect Service (“AVOICS”) is offered to Service Providers, based in the continental US, who require the establishment of voice over internet protocol (“VOIP”)-based connectivity for long distance call termination. • AVOICS • Is built on AT&T’s VoIP Network Infrastructure “VNI” • MPLS-enabled (Multi-Protocol Label Switching) • SIP – Based VoIP Platform

4. AVOICS Service Overview • Supported Call Types • Domestic - 1+ Outbound and International Outbound • AVOICS accepts U.S.-originated domestic outbound (1+) calls and U.S.-originated international outbound (011+) originated calls. • “U.S.-originated” refers to calls originated from all NPAs within the continental United States, Alaska, Hawaii, Guam, The Commonwealth of the Northern Mariana Islands, Puerto Rico and the U.S. Virgin Islands. • Unbranded Directory Assistance • AVOICS will also provide unbranded directory assistance (NPA-555-1212) for the Domestic US, Canada and Puerto Rico. Customer hands all traffic to AVOICS in IP - Native (IP) Origination: Call originates from the consuming user as IP - Non-Native (TDM) Origination: Call originates from the consuming user as TDM and is then converted by the Wholesale Customer to IP

5. AVOICS Customer’s Network SBC SBC SBC End-User 3rd Party ISP MIS-PNT MIS 3rd Party ISP PE (PNT) AR (MIS) Public IP Peering Point AT&T CBB CBB IGR Common Back Bone OSR OSR AT&T VNI IPBEs IPBEs VNI AVOICS VoIP Network Infrastructure NGBEs NGBEs 4 4 AT&T PSTN PSTN 5 5 Connectivity Options • Network Architecture • Dedicated MIS/MPLS-PNT Connectivity between Customer Router and AT&T • T1 through OC48 • Ethernet • Transport Independent Access (TIA) • (Available Mid June , 2009) • MIS - Shared facility available to support AVOICS • Public Peering Point - Internet Gateway Router- IGR Service Elements • SIP Signaling • Compression (CODEC call by call) - G.711, G726, G.729 A/B • T.38 Fax over IP • Connectivity between IP Voice Network and TDM PSTN • Domestic and International Termination of LD Traffic

6. AVOICS - Pricing Structure Overview • VoIP Calls - Usage Elements • Domestic • Domestic Transport Usage rate (per MOU) • Domestic Termination Rate File by State/LATA/OCN (per MOU • Timing is initial 18 seconds, and each additional 6 seconds • International • International Rates are Bundled (Transport and Terminating access - per MOU) • - Timing is initial 18 seconds, and each additional 6 seconds • For Mexico and all AT&T Commercial Satellite and AT&T Maritime Mobile Service, there is one minute timing. • IP Connectivity and Facilities • Dedicated Facilities • MIS-PNT • AT&T MIS PNT Service, with associated pricing elements (local channel charges, MIS PNT Port), are ordered and priced under a separate agreement. Transport Independent Access MIS • AT&T MIS, with associated pricing elements are ordered and priced under a separate agreement. Public IP Peering Gateway/Point • There are no specific charges associated with this access method

7. AVOICS - Customer Responsibilities • Manage & Hosts the End User VoIP Application • Manage & Hosts Gateways & Soft Switch’s for call processing • Manage CLEC Functions - Provide Local Number assignments, CALEA, Directory listings, - e911, N11, … • - End User Customer Premise Equipment (CPE), • Brand service as your own • Manage all end user customer care and billing • Monitor / forecast network needs • Use applicable ordering and maintenance processes / systems • Provide footprint for current & planned service areas • Responsible for all fraud claims

8. AVOICS - Customer Care and Billing • Ordering • Initial Design, Interoperability Testing (IOT) Technical Due Diligence (TDD) and Contracting Via AVOICS Sales and Technical Support Team • AVOICS Customer Care End to End Project Management • Maintenance • Toll Free Number • 24/7 – 365 • Trouble Ticketing process • Billing • Monthly summary invoices • Daily, weekly or monthly CDRs • CDR – Call Detail Record Layout • EMI – Exchange Message Interface format (Based on Industry Standardization) • Media Type(s) • CD Rom • Electronic Daily Feed CDR=[Date],[Time],[CPN],[Dialed Number],[Duration]

9. AT&T’s networking infrastructure operates at 99.999% reliability MPLS for stability and class of service Scalablecapacity and best practices AT&T global MPLS network provides inherent network security. Superior Customer Experience Multilayer support structure Get service when and the way you ‘expect’ it • AT&T’s AVOICS Customer Value -The Power of the AT&T Network Availability & Reliability Security Service

10. Next Steps • Meet The AVOICS Sales Support Team • AT&T Wholesale Account Team • AVOICS Sales Overlay Specialists • AT&T Technical Support Team • Schedule the AVOICS Interoperability Test (IOT) Plan and Complete SIP Profile • Work Through the AVOICS Technical Due Diligence (TDD) • Receive The AVOICS Customer and Technical Guide • Review the AVOICS Service Description and Pricing Arrangements • Start the contracting process

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