Explanation/Reference:
Explanation:
Task 9: Configuring the Traversal Zone
The traversal zone configuration defines a connection between the VCS Control and VCS Expressway platforms.
■ A traversal zone connection allows firewall traversal for signaling and media between the two platforms.
■ The VCS Control is configured with a traversal client zone, and the VCS Expressway with a traversal server zone.
To configure the traversal zone:
1. Go to Configuration > Zones > Zones.
2. Click New.
3. Configure the fields as follows (leave all other fields with default values):

4. click create zone.
Exp2: D = Zones > Traversal Zone > H.323 port, typically 6001 for first traversal zone, 6002 for second etc.
Reference: http://www.cisco.com/c/dam/en/us/td/docs/telepresence/infrastructure/vcs/config_guide/X8-1/ Cisco-VCS-Basic-Configuration-Control-with-Expressway-Deployment-Guide-X8-1.pdf
http://www.cisco.com/c/dam/en/us/td/docs/telepresence/infrastructure/vcs/config_guide/X8-2/Cisco-VCS- IP-Port-Usage-for-Firewall-Traversal-Deployment-Guide-X8-2.pdf