CME to CUCM SIP trunk help

[william.b.hannon.mil1]

Team,

I am working on a SIP trunk from my 2821 router (12.4) to CUCM 8.6. I am able to make calls from CUCM to CME but not from CME to CUCM. Any help you can provide would be greatly appreciated.

[Diego Chvz]

Hi William,

Make sure that SIP trunk is accepting the correct number of final digits for inbound calls sent by CME. You can find this parameter in SIP trunk config under Call Routing Information > Inbound Calls > Significant Digits, in addition make sure that your Calling Search Space under the same menu Call Routing Information > Inbound Calls is the correct. If not, apply the changes, reset the SIP Trunk and test.

[william.b.hannon.mil1]

Dchavezs,

The settings you wanted check seem right as the are the default. 

Call Routing Information > Inbound Calls > Significant Digits = All

Call Routing Information > Inbound Calls > Calling Search Space = < none > 

[Mohammed al Baqari]

From CME can you get the output of debug ccsip mess for failed call

[william.b.hannon.mil1]

Attached is the debug you requested. The phone 1004 is the CME and phone 7000 is the CUCM, there is no firewall between the two devices. I see some logs referencing my houston.voip.ms, this is my external SIP provider and it seems to be working fine. Haven't tried it from the CUCM though, one issue at a time.

[Mohammed al Baqari · Accepted solution]

Hi,

Ensure that the your CUCM SIP trunk is having IP of 192.168.0.254.

Ensure that your SIP Trunk Security Profile is having port 5060 TCP+UDP

Rest your SIP trunk

[william.b.hannon.mil1]

That was the issue, Thanks for your help.