[Freeswitch-users] DTMF in SIP and pstn

Stanislav Sinyagin ssinyagin at gmail.com
Mon Nov 2 14:54:33 MSK 2015

you need to turn on DTMF detection in FreeSWITCH (at a cost of CPU
cycles, so you need to be careful).


On Mon, Nov 2, 2015 at 12:31 PM, Vishal Sharma
<vishal.sharma at knowlarity.com> wrote:
> Hi,
> In pstn when I play a sound file which contains dtmf digits, FS produce dtmf
> digits which can be detected on other end. I use sangoma card.
> but when I play same file, on sip. no dtmf is generated or detected on other
> end.
> it simply play a beep sound ...
> Can I play a sound file and generate DTMF digits on SIP.
> Regards,
> Vishal Sharma
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