PSTN->CUCM->PSTN not sending calling number after transfer call

[Grigory Trubnikov]

Hello.

I have mgcp gateway and CUCM. When call is comming to CUCM I answer by internal phone. After this I transfer call to PSTN. When transfer is complete I see calling number of internal phone, but I need to see first calling number of external phone. At PSTN side is Alcatel station.

I checked logs and saw that CUCM didn't send first external number to PSTN-side after transfer call have completed.

What is reason of this?

Thanks in advance.

[paolo bevilacqua]

First of all, I apologize for not having understood the question before, I think now I do.

Differently from what Manish said, I believe that QSIG updated calling number after transfer is complete is not sent with a NOTIFY message.

It should be sent instead with a FACILITY messages, that encondes a QSIG CallTransferComplete event. See http://www.ecma-international.org/publications/files/ECMA-ST/Ecma-361.pdf for some details (leaving alone the SIP part).

CUCM is supposed to support that: see: http://www.cisco.com/en/US/docs/voice_ip_comm/cucme/pbx/interop/notes/465517px.pdf Table 3 and 4. Even if the document is about a different PBX, QSIG operations should be standard and the same.

Now, I don't know how your system is configured however from the trace you sent it seems to me it is not doing QSIG at all (lack of facility IE in SETUP).

[Grigory Trubnikov]

Paolo, thank you.

What you can propose?