We have 2 CUCM 6.1 systems in the 2 different cities (A and B). These 2 systems are connected for 4-digit dialing via ICT in MPLS network. We just found out today that the call is disconnected in about 5 mins when you are on the phone between [email protected] and phone @B. The call is suddenly disconnected with busy tone.
I did some tests:
Phone @ A system calls Phone @ B system - Disconnected after 5 mins
Calls between each own system (in network) are ok - not limited to 5 mins
Is there service parameter in CallManager that I should know for calls between ICT? Or probably in the gateway?