Can somebody explain in simple words what are traversal and non-traversal calls?, what is the difference? And also Does the VCS control below need traversal licenses?,
Thanks in advance.
If you have two C-series Endpoint (i.e. CTS-SX20) both registered on VCS Control and also Endpoint able to reach out directly each other (has routing), then in general the call will treat as non-traversal call, so no traversal license will be required.
However if those Endpoint calling each other but using different protocol (i.e. one Endpoint registered on VCS Control only with H323 and other Endpoint registered on VCS only with SIP), or different IP version (i.e one with IPv6 and other with IPv4 registration), then VCS Control will remain the media routing in order to handle such interworking scenario which will require traversal call license.