Was one of the supp service changes you tried: "send send-receive SDP in mid-call INVITE?"
Can you post your SIP control messaging? To prevent Cisco Unified Communications Manager from sending an INVITE a=inactive SDP message during call hold or media break during supplementary services, edit the appropriate SIP profile, and check the *Send send-receive SDP in mid-call INVITE* check box. *Note *This check box applies only to early offer enabled SIP trunks and has no impact on SIP line calls. Source: http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/admin/8_5_1/ccmsys/accm-851-cm/a08trnk.html#wp1150004 -Anthony On Wednesday, April 30, 2014, Dana Tong <[email protected]> wrote: > Good evening all, > > > > A colleague and myself have discovered an issue where a Blind transfer has > one-way audio. > > > > The scenario is as follows: > > IP Phone to IP phone call > > Transfer to off-net mobile via SIP Trunk (via CUBE) > > Blind Transfer > > > > When the remote person answers the phone, there is audio heard on the > remote party, but nothing on the IP phone. > > > > The SIP trace SDP appears OK. The IP addresses seem to be c=IN IP is > correct. > > The web page for the phone reports Stream = Not Ready. > > > > Does anyone have any tips or thoughts on this issue? Have tried a number > of config changes with respect to supplementary services on the CUBE, and > MTP etc on the CUCM Trunk. > > > Cheers > > Dana > > >
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