the most common reason why calls fail after the magical 10 minutes is there is a TCP keepalive timeout, and this then kills the H323 session. Chances are you have some kind of firewall of something else that is blocking the traffic.
We had several incidents of this being caused by customers putting 'Trend Micro Personal firewall' on the CUCM servers.
Another way to confirm this is a timeout issue is to change from H323 to SIP. These calls use UDP based transport, so there is no need for a layer 4 keepalive.
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...
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 discusses the bas...