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

[Steven Ayre]

Thanks for letting us know what worked, it'll be a great help to anyone
Googling this problem in future. :o)



On 18 December 2012 17:43, Richard Brady <rnbrady at gmail.com> wrote:

> 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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