I have a CUBE (IOS 15.2.1(T)) connecting between an MS-Lync system and a CUCM 8.6 system.
Normal calls are going through the CUBE fine. But when a Lync number is call forwarded back to CUCM, the divert call fails.
Doing a Wireshark, I can see the SIP message to setup the new call leg come into CUBE:
INVITE sip:01AAAAAAAA@172.18.1.249;user=phone SIP/2.0
FROM: "G Ross (CS)"<sip:BBBBB;phone-context=PstnGateway_172.firstname.lastname@example.org;user=phone>;epid=7FD7CE0A07;tag=d88c165560
CSEQ: 27001 INVITE
VIA: SIP/2.0/TCP 172.18.3.241:59407;branch=z9hG4bK3323b06f
USER-AGENT: RTCC/188.8.131.52 MediationServer
but nothing goes out to CUCM. (and so Lync times out the setup of this new call leg)
In the CUBE config, I've got:
voice service voip
dial-peer voice 9999 voip
voice-class sip referto-passing
Any suggestions as to what to do, or where to look ?
Can you upload the full sip trace you have collected along with the complete call flow and show run from the cube?