Failing Outbound calls

[Madhusudhan Rao M]

Hi,

We had migrated our CCM from 4.2 to CCM 6.1.5. Everything from the server end is good, but for some sites we see that we have Outbound issues. Am not able to pin point where is the problem. I had TAC case opened and engineer says it is telco issue which am not satisfied since it was working before the cutover to 6.1.5.

Has anyone come across this issue? is there any configuartion that needs to be done on the CallManager Gateway page?

Regards,

Madhusudhan

[Roman Rodichev]

Hello Madhusudhan,

are the calls going over PRIs? Login to your gateway and issue:

conf t

logging monitor

exit

term mon

debug isdn q931

and make a call, are you seeing an outbound call attempt? If not, then you got the problem between the gateway and the callmanager, or potentially something wrong with the call routing in the callmanager. Verify that your gateway is registered:

show ccm-manager

you should see the gateway registered to your CMs. If they are not registered, did you by any chance change the hostname on the gateways?

If you do see outbound call attempts in the debug and the call is still failing, verify what digits are being sent to the provider.

Post the debug here.

Regards,

Roman

[Madhusudhan Rao M]

Description: Outbound calls were working with old 4.2 cluster. When we migrated to CUCM 6.1.5 the outbound call for some sites failed. When we run a debug on VG, the call setup was immediately followed by a Release comp. Now we cannot say this as telco issue since it was working previously. Is there anything that is additional on CUCM 6.1.5 which causes this issue particularly the CUCM--àGateway---àPage.

I tried changing some parameters on this page, and run some debug on VG, this time the call setup was followed by a setup ack, call procee, alerting and a ring back. But again the call failed. Need to understand on this

Changes that we did on CUCM VG config / Outbound Calls / Calling party IE = CallManager, uncheck display IE delivery, uncheck redirecting number IE delivery

Called Number: +66-81-701 0795

Calling Number: 2751

Attached the Voice gateway Logs, for reference

[Madhusudhan Rao M]

found the issue, it was related to CUCM 6.1 G722 codec negotiation. After disabling this, the issue was resolved