Installation guide

Dial Plan Configuration – Integrating Lync
Acano solution: Single combined Acano server Deployment Guide R1.6 76-1054-01-H
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Figure 11: 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 Lync Edge information for the
call.
The call media then flows directly between the Call Bridge and TURN server on UDP port 3478
and returns 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: 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
TURN / ICE role for Lync calls, and so at some level is an alternative to the TURN Server
Settings above.)