Call via Inter Cluster Trunk is disconnected after about 5 minutes

[sienz]

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 phone@A and phone @B. The call is suddenly disconnected with busy tone.

Calls between each own system (in network) are ok – not limited to 5 mins

Any idea where should i start looking on this issue?

 

[trvlr1]

Have you got the access to see if you are getting errors on the circuit. It could be that errors are building up and resetting the circuit, hence dropping the calls.

 

[sienz]

Thanks trvlr1. I will look for it. I am currently looking at the Cisco log at RTMT and CDR reporting

 

[reddragonuk]

is there a firewall between the two?