Sorry to dig up an old thread, but ran into this same problem, and trying to understand the RFC as what is actually the expected behaviour.

So in the RFC (http://www.ietf.org/rfc/rfc3264.txt) in the Unicast Streams section:

For sendrecv RTP
streams, the payload type numbers indicate the value of the payload
type field the offerer expects to receive, and would prefer to send


Doesn't that mean if they say 96 and FS says 101, they should be listening on 96 and FS should be listening on 101? Kinda like how ports work, you listen on the port that you offer.

Am I completely misinterpreting?

Thanks,
Dan


On Sat, Oct 31, 2009 at 11:58 AM, Brian West <brian@freeswitch.org> wrote:
We have <param name="rfc2833-pt" value="101"/> on the profile and you
to set this.

So you can set it to 96 if needed.  But you shouldn't have to do that
if they say 96 and we say 101 they should be listening on 101 from us
and we should be listening on 96 from them... thats why its called an
RTP map.

/b

On Oct 31, 2009, at 10:48 AM, Patrick List wrote:

>> On Oct 24, 2009, at 8:13 AM, Dennis wrote:
>>
>>> ok, as written, i come back after some tests with fs and a thomson
>>> cirpack.
>
> No idea if this is useful as I'm a noob with fs. If not please excuse
> the noise. In the past Asterisk to work properly with Cirpack needed
> the
> following patch:
>
> diff -uNr asterisk-1.4.19.org/main/rtp.c asterisk-1.4.19/main/rtp.c
> --- asterisk-1.4.19.org/main/rtp.c    2007-10-08 22:06:33.000000000 +0200
> +++ asterisk-1.4.19/main/rtp.c        2007-11-11 13:12:28.000000000 +0100
> @@ -1383,6 +1383,7 @@
>       [34] = {1, AST_FORMAT_H263},
>       [103] = {1, AST_FORMAT_H263_PLUS},
>       [97] = {1, AST_FORMAT_ILBC},
> +     [96] = {0, AST_RTP_DTMF},
>       [99] = {1, AST_FORMAT_H264},
>       [101] = {0, AST_RTP_DTMF},
>       [110] = {1, AST_FORMAT_SPEEX},
>
> Maybe this helps.
>
> Regards,
> Patrick
>
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