Wondering if anyone else has seen this and might be able to recommend one more thing to look at before I open a case.
I have an admin user that sets up a lot of con calls during the day. Sometimes the users function is just to get all the parties together and then drop out of the call. When they drop out of the conference the conference drops. By default we are set up keep the conf active. We have 5,000+ phones (1,500+ 7962s) and users on this cluster and not one other user experiences this issue. I have changed the device pool, MRGL, and even went as far as to blame the phone and change it. But I still have the issue.
CUCM Version 9.1.1 7962 Firmware Version: SCCP42.9-2-1ES5S