[Freeswitch-users] SIP re-INVITEs and DTMF renegotiation

[Richard Brady]

Looks like <param name="liberal-dtmf" value="true"/> in the profile does
the trick!


On 18 December 2012 17:00, Richard Brady <rnbrady at gmail.com> wrote:

> Hi folks
>
> I have the joy of talking to a Cisco device which behaves in weird and
> wonderful ways.
>
> When transferring a caller (in this case FreeSWITCH) to MOH it negotiates
> RFC2833 out of the SDP.
>
> When reconnecting the caller to a more meaningful endpoint, it
> renegotiates the media again, but using delayed offer/answer, which means
> FreeSWITCH must perform the offer.
>
> Since FreeSWITCH has seen RFC2833 removed previously:
>
>     [DEBUG] sofia_glue.c:5277 No 2833 in SDP. Disable 2833 dtmf and switch
> to INFO.
>
> It does not offer RFC2833 in the new SDP (if it did, the Cisco would now
> accept it and answer with it).
>
> Any suggestion for how I can force it to re-offer RFC2833?
>
> Regards,
> Richard
>
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