Cisco Cisco TelePresence Video Communication Server Expressway
Enabling endpoints registered on the video network to call Lync clients registered on Lync Server
Cisco VCS Deployment Guide: Microsoft Lync 2010 and Cisco VCS X6.1
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Set up H.323
SIP interworking
For H.323 endpoints to be able to communicate with Lync Server Cisco VCS must interwork the SIP
signaling and H.323 signaling.
signaling and H.323 signaling.
When H.323 endpoints are interworked to Lync Server SIP, the Cisco VCS carrying out the
interworking needs to know that it is interworking to Lync Server (as the interworking functionality
needs to specifically handle the requirements of Lync Server ), therefore the interworking must be
carried out on the “Lync gateway” Cisco VCS.
interworking needs to know that it is interworking to Lync Server (as the interworking functionality
needs to specifically handle the requirements of Lync Server ), therefore the interworking must be
carried out on the “Lync gateway” Cisco VCS.
To ensure interworking is carried out on this “Lync gateway” Cisco VCS, set H.323
SIP
interworking mode to On (rather than Registered only, as usually recommended).
1. Go to the Interworking page (VCS configuration > Protocols > Interworking).
2. Set H.323
SIP interworking mode to On.
3. Click Save.
Set Call routed mode to Always
Even if the “Lync gateway” Cisco VCS is part of a cluster, and the cluster deployment guide says that
Call routed mode should be set to Optimal, when connecting to Lync Server, Call routed mode must
be set to Always, so that the signaling from Lync Server is always processed by the “Lync gateway”
Cisco VCS.
Call routed mode should be set to Optimal, when connecting to Lync Server, Call routed mode must
be set to Always, so that the signaling from Lync Server is always processed by the “Lync gateway”
Cisco VCS.
1. Go to the Calls page (VCS configuration > Calls).
2. Set Call routed mode to Always.
3. Click Save.