[Freeswitch-users] send_dtmf not working

[Matt Broad]

Hi Steven,

thanks for the reply :)

So if I leave out the start_dtmf and start_dtmf_generate, the send_dtmf 
will use RFC2833?  This would be great.
I have noticed that when running the example I sent in my original 
email, that if I play a file before the send_dtmf that the dtmf gets 
sent fine, but not playing a file will cause the dtmf to not be sent :/
I have put in a work around that plays a blank file, and that seems to 
work, but could this be a bug?

thanks
Matt

On 30/06/2014 15:55, Steven Ayre wrote:
> 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 
> <mailto: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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