5         Lync Server Configuration

5.1        Add Cisco ISR Gateway to Lync Topology

Lync recognizes Cisco ISR as a PSTN gateway connected by SIP.  So we need to add Cisco ISR to the Lync topology by adding it as a PSTN gateway. 

1.       To add a PSTN gateway to the Lync topology, run Lync Server Topology Builder as a user in the CSAdministrator group. Then add the Cisco ISR Gateway to the PSTN gateway topology

Figure 2: Configure PSTN Gateway -1








2.       Set FQDN: This is the IP Address or FQDN of the Cisco ISR Gateway.

Figure 3: Configure PSTN Gateway -2













3.       Set Trunk Name: This is the FQDN of the ISR

4.       Set Listening port for IP/PSTN gateway: 5060 for TCP

5.       Set SIP Transport Protocol: TCP

6.       Set Associate Mediation Server: Assign this PSTN gateway to the Mediation Server. Medpool.lynclabkm2013.local is used here for example.

Figure 4: Configure PSTN Gateway -3









7.       Publish topology to make the changes effective, refer to below screen capture for the process.


Figure 5: Publish Topology