Cisco Cisco TelePresence Video Communication Server Expressway
Appendix 11 – Media paths and license usage for calls through B2BUA
Cisco VCS Deployment Guide: Microsoft OCS 2007 R2, Lync 2010 and Cisco VCS X7.0
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An external MOC/Lync client calls an external video
endpoint
endpoint
In this scenario an external MOC/Lync client (alice.parkes) calls an external video endpoint
(david.jones.external).
(david.jones.external).
Signaling flows through the Microsoft Edge Server, OCS/Lync, B2BUA, VCS Control and VCS
Expressway. Optimal call routing may allow the call signaling not go through the “OCS/Lync
gateway” VCS after the initial search (see VCS Administrator Guide for more details).
Expressway. Optimal call routing may allow the call signaling not go through the “OCS/Lync
gateway” VCS after the initial search (see VCS Administrator Guide for more details).
Media between the Lync client and the B2BUA flows either through the Microsoft Edge server or
through the VCS Expressway TURN server – ICE searching is used to determine the ‘best’ path.
through the VCS Expressway TURN server – ICE searching is used to determine the ‘best’ path.
Media between the external video endpoint and the B2BUA flows through the VCS Control / VCS
Expressway traversal link.
Expressway traversal link.
Calls made in the opposite direction, external video endpoint to external MOC/Lync client would
use the same signaling and media paths.
use the same signaling and media paths.
Licensing
•
•
1 traversal call license and up to 18 TURN licenses on the VCS Expressway
•
1 traversal call license on the VCS Control
•
1 or 0 non-traversal call licenses on the “OCS/Lync gateway” VCS
signaling
media