Topic Last Modified: 2012-09-28

This procedure details the steps to configure the Lync Server 2013 pool to use the Lync Server 2013 Mediation Server, instead of the legacy Office Communications Server 2007 R2 Mediation Server.

To successfully publish, enable, or disable a topology when adding or removing a server role, you should be logged in as a user who is a member of the RTCUniversalServerAdmins and Domain Admins groups. It is also possible to delegate the proper administrator rights and permissions for adding server roles. For details, see Delegate Setup Permissions in the Standard Edition server or Enterprise Edition server Deployment documentation. For other configuration changes, only membership in the RTCUniversalServerAdmins group is required.

For the latest information on finding qualified PSTN gateways, IP-PBXs, and SIP trunking services that work with Lync Server 2013, see "Microsoft Unified Communications Open Interoperability Program" at

To configure Mediation Server Using Topology Builder

  1. Open an existing topology from Topology Builder.

  2. In the left pane, navigate to PSTN gateways.

  3. Right-click PSTN gateways, and then click New IP/PSTN Gateway.

  4. Complete the Define New IP/PSTN Gateway page with the following information:

    • Enter the gateway FQDN or IP address. The FQDN of the gateway is required if the gateway uses the TLS protocol.

    • Accept the default value of the Listening port for IP/PSTN gateway or enter the new listening port if it was modified.

    • Set the Sip Transport Protocol.

  5. In the left pane, navigate to the Enterprise Edition Front End pool or the Standard Edition Server.

  6. Right-click the pool, and then click Edit Properties.

  7. Under Mediation Server, set the Listening ports.

  8. Next, associate the newly created PSTN gateway by selecting it and clicking Add.

  9. In Topology Builder, select the top-most node Lync Server.

  10. From the Action menu, select Publish Topology and then click Next.

  11. When the Publishing wizard completes, click Finish to close the wizard.

It is important that you complete the next topic, Change Voice Routes to use the new Lync Server 2013 Mediation Server to ensure that the voice routes are pointing to the correct Mediation Server.