Cisco Cisco TelePresence Video Communication Server Expressway

Enabling calls between endpoints registered on Cisco VCS Controls in the video network 

The configuration of the Cisco VCS Control(s) in the video network to allow calls to be made between 
endpoints that register to them should already have been carried out. 

Ensure that the following 2 items are configured: 

1.  SIP domain of the video network - needed for SIP registration and presence handling. 

2.  Default links between the Cisco VCS Control’s zones. 

Note: In small test and demo networks this configuration is carried out on the same Cisco VCS that is 
the “OCS Gateway” Cisco VCS 

SIP endpoints register with the Cisco VCS Control with a URI in the format user-id@sip-domain. The 
Cisco VCS Controls accepting these registrations must be configured with the SIP domain information 
so that it will accept these registrations. 
1.  Go to the Domains page (VCS configuration > Protocols > SIP > Domains). 

2. Select 

New. 

3. Set 

Name to, for example, vcs.domain. 

4. Select 

Create Domain. 

 

 

For a call to succeed there must be appropriate links between Zones. 

Links must exist from: 

 

Default Subzone to Traversal Subzone 

 

Default Subzone to Default Zone 

 

Default Subzone to Cluster Subzone (this is required even if Cisco VCS is not part of a cluster) 

 

Traversal Subzone to Default Zone 

 

Check these on the Links page (VCS configuration > Bandwidth > Links). 

 

 

Cisco VCS Deployment Guide: Microsoft OCS 2007 R1 and R2 and Cisco VCS X5.2 

Page 17 of 92