I have a lab with 2 callmanager expresses both registered to Gatekeeper. I can make a video call inside each callmanager express but I'm not able to make video calls when I call from callmanager express A to B and viceversa, I just get audio in the calls.
What do I need to configure inside the Gatekeeper to send the video between callmanagers?
CME to H323 to CME is a supported video call flow:
A couple of things to check:
a. Enable H323 slow start under Voice Service VoIP or Voice Class
voice service voip
supplementary-service h450.12 advertise-only
call start slow
b. Make sure there is enough bandwidth for a video call both in configuration and WAN bandwidth availability
Hope this helps.