Topic Last Modified: 2012-09-21

Perform this procedure at the central site, which contains at least one Front End pool or Standard Edition server.

Before you perform the procedure, the following conditions must be in place:
  • Lync Server 2013 communications software must be set up at the central site.

  • Mediation Server must be deployed at the central site.

To define a PSTN gateway

  1. Click Start, click All Programs, click Microsoft Lync Server, and then click Lync Server Topology Builder.

  2. In the console tree, expand the central site, expand Branch Office Sites, expand name of the branch site that you want to define a public switched telephone network (PSTN) gateway for, and then expand Shared Components.

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

  4. In the Define New IP/PSTN Gateway dialog box, click Gateway FQDN or IP Address, and then type the fully qualified domain name (FQDN) or IP address of the gateway that you are deploying at the branch site.

  5. Click Listening Port for IP/PSTN Gateway, and then accept the default values.

  6. In the SIP Transport Protocol list, click the transport protocol the gateway uses, and then click OK.

    For security reasons, we strongly recommend that you use a PSTN gateway that supports Transport Layer Security (TLS).
Use the cmdlet Set-CsPstnGateway to modify properties of a PSTN gateway. For details, see Set-CsPstnGateway, in the Lync Server Management Shell Help.

Next step for branch-site resiliency: Configuring Users for Branch Site Resiliency

See Also