<div dir="ltr">SIP trace won&#39;t show the DTMF. Digits would normally probably be sent via RFC2833 packets, which would show in a packet trace of the RTP stream.<div><br></div><div>In your case you&#39;re running start_dtmf and <span style="font-size:13px;font-family:arial,sans-serif">start_dtmf_</span><span style="font-size:13px;font-family:arial,sans-serif">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&#39;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&#39;re sending DTMF both inband and out-of-band.</span></div>

<div><span style="font-size:13px;font-family:arial,sans-serif"><br></span></div><div><font face="arial, sans-serif">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&#39;re sent in.</font></div>

<div><font face="arial, sans-serif"><br></font></div><div><font face="arial, sans-serif">If the device you&#39;re sending to isn&#39;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.</font></div>

</div><div class="gmail_extra"><br><br><div class="gmail_quote">On 30 June 2014 14:24, Matt Broad <span dir="ltr">&lt;<a href="mailto:matt@inveroak.com" target="_blank">matt@inveroak.com</a>&gt;</span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">

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