[Freeswitch-users] rtpmap line missing on answer

[Kristian Kielhofner]

You'll need to use proxy media to pass NSE across a bridge:

http://wiki.freeswitch.org/wiki/Proxy_Media

Please keep in mind there are several advantages and disadvantages to
using this media mode.

On Fri, May 20, 2011 at 2:54 PM, Sean Eichhorn <seichhorn at gci.com> wrote:
> I have a freeswitch system that (for the most part) works flawlessly for
> me.  However, I need to have an additional rtpmap line in the SDP when a
> call is answered.
>
> My client sends the following SDP upon answering the call :
>
>    m=audio 17214 RTP/AVP 0 19 101 100
>
>    c=IN IP4 192.168.98.79
>
>    a=rtpmap:0 PCMU/8000
>
>    a=rtpmap:19 CN/8000
>
>    a=rtpmap:101 telephone-event/8000
>
>    a=fmtp:101 0-16
>
>    a=rtpmap:100 X-NSE/8000
>
>    a=fmtp:100 192-194
>
>
>
> Freeswitch forwards the following SDP to the external gateway :
>
>    m=audio 20654 RTP/AVP 0 19 101
>
>    c=IN IP4 66.223.187.208
>
>    a=rtpmap:0 PCMU/8000
>
>    a=rtpmap:19 CN/8000
>
>    a=rtpmap:101 telephone-event/8000
>
>    a=fmtp:101 0-16
>
>
>
> The other information appears fine.  Everything works, but my client-side is
> not receiving the a=rtpmap:100 line.
>
> This issue appears regardless of whether or not I’m in proxy mode, bypass
> mode, or neither.
>
>
>
> Using "sip_append_audio_sdp” has no effect on the answering SDP, only the
> initial offer.
>
>
>
> Any ideas?
>
>
>
> Thanks in advance,
>
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>



-- 
Kristian Kielhofner