1. Microsoft ® Lync ™ SIP Trunking with Lync

2. Agenda ▪What is SIP Trunking? ▪SIP Trunking Benefits ▪SIP Trunking Deployment Scenarios with Lync ▪Qualified SIP Trunking Partners

3. SIP Trunking Overview ▪SIP Trunking enables an enterprise to communicate with internal and external users over IP, including calls to traditional PSTN networks. ▪Utilizing the SIP protocol provides a platform for future delivery of other real time communication modalities. SB C Lync Server Central Site Lync Endpoints Lync Servers Service Provider Core Network Service Provider MPLS Network Customer DMZ SIP Trunk

4. SIP Trunking Enables- Aggregation of Trunks ▪Combine all voice trunks from many office sites into a few data centers ▪Track and Manage usage using ‘Usage’ portal ▪Quickly add capacity and services on demand (ex. Conferencing) Aggregation of Access ▪Reduced number of facilities required ▪No fixed capacity or location requirements ▪Less HW to purchase, maintain, and operate ▪Simpler Integration point to existing IP PBX’s On-Net Calling ▪Make free calls with users in the same service provider network

5. SIP Trunking Benefits Cost Saving Save telecommunication costs from replacing expensive circuits with cheaper trunks Save management cost in customer premise equipment Optimize communications spending by managing usage per consumption Technology Efficiency Design network and manage capacity with flexibility Streamline IT administration with network consolidation and management flexibility Future Extensibility Multimedia and value add service stream thru SIP Trunk

6. SIP Trunking Deployment with Lync Support ▪SIP Forum Website: End-to-End (E2E) support responsibility between Microsoft (MSFT), Service Provider (SP), and Customer are defined by deployment scenario SBCs (Session Border Controllers) ▪SIP Trunking deployment model supports SBC’s at the SP core network or on Premise

7. E2E Support: Premise Router ▪Service Provider(SP)/Microsoft (MSFT) provide end to end solution support via UCOIP. ▪Mediation Server and core network SBC interoperate via SIP-TCP/UDP and RTP (G.711). ▪Premise router can transcode G.711 to another codec (ie. G.729) if needed. ▪Lync Server provides network edge access to Lync clients and Lync Server federated networks. SB C Lync Server Central Site Lync Endpoints Lync Servers Service Provider Core Network Service Provider MPLS Network Customer DMZ Router Mediation Server Lync Edge Servers Lync Federated Network Lync endpoints SP/MSFT Supported Components TCP/UDP TCP

8. E2E Support: Premise SBC ▪SP/MSFT provide E2E solution support via validated MSFT UCOIP Program. ▪Premise based SBC provides access to the Service Provider “core” network. ▪Mediation Server and the customer premise SBC interoperate via SIP-TCP and RTP (G.711). ▪Lync Server provides network edge access to Lync clients and Lync Server federated networks. SBC Lync Server Central Site Lync Endpoints Lync Servers Service Provider Core Network Service Provider MPLS Network Customer DMZ Premise SBC Mediation Server Lync Edge Servers Lync Federated Network Lync endpoints SP/MSFT Supported Components TCP/UDP TCP 3 rd party IP-PBX

9. Qualified SIP Trunking Partners VendorService Coverage AT&TUS BT Global ServicesEurope ColtEMEA Global CrossingUS, Latin America, W. Europe, Singapore IntelePeerUS InterouteWestern Europe Level 3US MyNetFoneAustralia Orange Business ServicesWestern Europe SpeakupNetherland SprintUS SwisscomSwitzerland TDCNorway TelenorNorway ThinkTelCanada VerizonUS, Western Europe