External SIP Server to CUCM trunk. Can´t put the calls on hold.

[tomas edwards]

Hello. I have a problem integrating an external SIP server with CUCM v7.1.

All is already configured.

I can place a call from the external SIP server to a phone registered in the CUCM. This is all OK.

The problem arise when the phone registered in the SIP server puts the call on hold. When this happens the CUCM terminates the call, with cause code 47. Packet capture shows that the external SIP server says to the CUCM to communicate with a media server (re-invite) but CUCM terminates the call.

In the trunk I have checked "Media Termination Point Required" and discarded codec mismatch issues.

Any suggestion is welcome.

I have attached a packet capture.

IP CUCM: 172.19.250.10.

IP external SIP server: 192.168.188.38.

IP media server: 192.168.188.20.

Thanks.

[lrosioru]

Hi Tomas,

We need to have on CUCM MRGL with MOH resources.

Do you have external MOH or only CUCM resources. Are you using unicast or multicast MOH?

What codec is established for your call initially (if only CUCM resources are used, they will be only G711)?

Regards,

Lilia

[tomas edwards]

Hi Lilia,

 MRGL has MOH resources already. The point is that the External SIP server tells the CUCM to initiate a SIP session with an external media server so I think is not necessary MOH in the CUCM. Is configured anyway.

The codec used is G711.

[lrosioru]

Hi Tomas,

Then CallManager detailed logs should help to understand what exactly is happening.

Regards,

Lilia

[ln33147]

Hello Thomas,

Could you please advise which media server you have used and how you integrated it with CUCM.

Thank you.

[ln33147]

Hello Thomas,

Could you please advise which media server you have used and how you integrated it with CUCM.

Thank you.