[cisco-voip] One-way audio after BLIND transfer to SIP Trunk

[Anthony Holloway]

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 <Dana_Tong at bridgepoint.com.au>
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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