Communication Manager configured as a feature server and trunk gateway

Last Updated : Aug 13, 2013 |

This section defines the connection and routing between Communication Manager and Session Manager.

You must configure two SIP signaling groups between Communication Manager and Session Manager:

  • A non-IMS signaling group to gain access to the trunk gateway.

  • An IMS-enabled signaling group for connection to the feature server.

For IMS users, Communication Manager must route all calls to Session Manager. For example, Communication Manager routes an incoming public trunk call to an IMS user to Session Manager on a non-IMS SIP signaling group. The signaling group routes the call back to the Communication Manager trunk gateway by using the IMS-enabled signaling group connected to the feature server part of Communication Manager.