Issue in while calling to UNIFY IP PBX registered IP phone to Cisco ip phone

[deepakrk27@gmail.com]

 I am able to received call from IP phone registered to Unify IP phone ,But I am getting Fast Busy tone while calling from Cisco IP Phone to other IP phone registered on Unify IP phone.

[George Sotiropoulos]

I would suggest to login to RTMT and check the SIP Messages you get from the logs:

RTMT-System-Trace&Log Central-View Real-Time-Data:

Category: UCM

Services: Call Manager

Trace File type:Call Logs

Please post this logs to check where you get the error. Worth restarting the SIP trunk between the 2 servers and also check the route pattern on the CUCM, the following link may be helpful:

https://www.cisco.com/c/dam/en/us/solutions/collateral/enterprise/interoperability-portal/unify-release-using-sip-trunk.pdf

George

[Leo Laohoo]

Check your dialplan.xml.