CallManager bandwidth and locations, etc are only for SCCP devices.
You have to have an MCU in SCCP mode somewhere because you also mentioned that you can successfully have more than 2 video endpoints in a conference. Add in the H.323 video conference unit.
Let's start with what MCU do you have? Then we can find out configurations of that.
I have a gut feeling that it is something else. Please, when the problem happens again, collect the trace files. That is going to be our "ace in the hole" in finding out what is actually going on. Not in front of you system or equipment, this could take forever. I might just suggest to open a TAC case (or call in your integrator) to have them verify the configs of everyhting involved.)
SIP traces provide key information in troubleshooting SIP Trunks, SIP
endpoints and other SIP related issues. Even though these traces are in
clear text, these texts can be gibberish unless you understand fully
what they mean. This document attempts to br...
Please find the attached HTML document, download and open it on your PC.
This provides an easy to use form where you simply answer a few
questions and it will render the proper jabber-config.xml file for you
to copy/paste. There is built in logic to verif...
[toc:faq]CUCM Database Replication is an area in which Cisco customers
and partners have asked for more in-depth training in being able to
properly assess a replication problem and potentially resolve an issue
without involving TAC. This document discusse...