[Freeswitch-users] DTMF

[Tihomir Culjaga]

yeah... doggy carrier, you should somehow get other leg SDP and check that
against telephone-event string.

i'd use execute_on_answer hook to try to get other leg SDP and than would
evaluate that to either start_dtmf or not.
anyhow, this is theoretical, but if there is no other straight method, i'd
try this.


T.



On 13 May 2017 at 23:27, Brian : <brians at iptel.co> wrote:

> Hello List,
>
> We have a PITA carrier that we do 2833 with 99.8% of the time.
> Sometimes if the carrier they are sending the call to doesn't support
> 2833 when they will send an OK back to us the SDP won't have 2833 in
> the RTP Map. Is it possible to detect this in dialog and start dtmf
> generate so we will send tones inband for these calls?
>
> For inbound calls we detect it with something like
>
> <condition field="${switch_r_sdp}"
> expression="a=rtpmap:(\d+)\stelephone-event/8000">
> on the initial invite.
>
> Just not sure how to do this for an OK in dialog or if its possible.
>
>
> Thanks!
> Brian
>
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