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

[Richard Brady]

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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