[Freeswitch-users] send_dtmf not working

[Steven Ayre]

SIP trace won't show the DTMF. Digits would normally probably be sent via
RFC2833 packets, which would show in a packet trace of the RTP stream.

In your case you're running start_dtmf and start_dtmf_generate - are you
sure you want those? They are for receiving and sending DTMF as in-band
DTMF tones instead of as SIP INFO / RTP RFC2833 packets. They're not a good
idea unless you actually require them since they increase the CPU load for
the call and can result in duplicated digits if you're sending DTMF both
inband and out-of-band.

For debugging purposes DTMF packets sent via start_dtmf_generate cannot be
seen in packet traces, unless you actually decode and listen to the RTP
stream they're sent in.

If the device you're sending to isn't hearing the digits it probably means
start_dtmf_generate is sending them inband and the device is only listening
for DTMF out-of-band.


On 30 June 2014 14:24, Matt Broad <matt at inveroak.com> wrote:

> Hi,
>
> I have the need to send a dtmf tone, but send_dtmf does not seem to work.
> I have the following in a dialplan, but doing a sip trace the dtmf
> digits are not sent.  I have tried removing the start_dtmf and
> start_dtmf_generate, but still no joy.
>
>          <action application="start_dtmf" />
>          <action application="start_dtmf_generate"/>
>          <action application="answer"/>
>          <action application="sleep" data="2000"/>
>          <action application="send_dtmf" data="0123456789ABCD*#@100"/>
>          <action application="sleep" data="2000"/>
>
> I am using FreeSWITCH Version
> 1.4.6+git~20140603T193516Z~9479729340~64bit (git 9479729 2014-06-03
> 19:35:16Z 64bit)
>
> thanks
> Matt
>
>
>
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