I am having such an extrange problem. I have a CM with 6.1.3 with a MGCP Gateway 2851. When conferencing with numbers outside the network, after a while, it becomes released with this reason:
*Jul 2 16:04:47.037: ISDN Se0/0/0:15 Q931: TX -> DISCONNECT pd = 8 callref = 0x0A39
Cause i = 0x80A9 - Temporary failure
I have the CM configured with g711/g722 for intraregion conferencing and g729 for interregion conferencing.
The gateway is not configured as conferencing bridge. Must I?
Thanks in advance