Installation guide

Dial Plan Configuration – Integrating Lync Clients
Acano solution: Deployment Guide R1.2 76-1006-06-K
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Figure 10: Call Bridge to Lync Edge Server Call Flow
4. The Front End server returns the URI of the media relay authentication server (MRAS). (The
Lync Edge Server acts as a MRAS.)
5. (and 6) Call Bridge contacts the MRAS over SIP to get the Edge information for the call.
The call media then flows directly between the Call Bridge and Edge’s TURN server on UDP
port 3478 and returns from Edge server to the Call Bridge on a port in the ephemeral range
above.
Therefore the following ports need to be opened in the firewall for the media between Call
Bridge and the Edge server: UDP 3478 outgoing and 32768-65535 incoming.
6.6.2 Configuration for using Lync Edge
To use a Lync Edge server, log in to the Web Admin Interface, go to Configuration > General
and configure the Lync Edge Settings. (When a Lync Edge server is configured, it takes the