Manual

Enabling endpoints registered on the video network to call MOC clients registered on OCS
When H.323 endpoints are interworked to OCS SIP, the Cisco VCS carrying out the interworking
needs to know that it is interworking to OCS (as the interworking functionality needs to specifically
handle the requirements of OCS), therefore the interworking must be carried out on the “OCS
gateway” Cisco VCS.
To ensure interworking is carried out on this “OCS gateway” Cisco VCS, set H.323

SIP
interworking mode to On (rather than RegisteredOnly, 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 “OCS 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 OCS, Call routed mode must be set to
Always, so that the signaling from OCS is always processed by the “OCS gateway” Cisco VCS.
Go to the Calls page (VCS configuration > Calls)
1. Set Call routed mode to Always.
2. Click Save.
Cisco VCS Deployment Guide: Microsoft OCS 2007 R1 and R2 and Cisco VCS X5.2 Page 34 of 92