Direct SIP Connections Support

Topic Last Modified: 2012-10-16

Microsoft Lync Server 2010 supports the use direct SIP connections to connect Lync Server 2010 to either of the following:

• An IP-PBX

• A PSTN gateway

The Mediation Servers in a Lync Server 2010 pool can control multiple gateways, Session Border Controllers (SBCs) provided by telephony service providers, or some combination thereof. Additionally, multiple Mediation Servers in the pool can interact with a single gateway.

You can use the Microsoft Unified Communications Open Interoperability Program for enterprise telephony infrastructure to find qualified PSTN gateways, IP-PBXs, and SIP trunking services. For details, see the Microsoft Unified Communications Open Interoperability Program website at https://go.microsoft.com/fwlink/p/?LinkId=187781.

For details about the topology and deployment options for direct SIP connections, see Direct SIP Connections in the Planning documentation.