<div dir="ltr">Hi,<div><br></div><div>I have the following dialplan in my public folder (the dest_number below is just an example):</div><div><br></div><div><div><include></div><div><span style="white-space:pre-wrap"> </span><extension name="dialExt1002"></div>
<div><span style="white-space:pre-wrap"> </span><condition field="destination_number" expression="^(1234)$"></div><div><span style="white-space:pre-wrap"> </span><action application="set" data="drop_dtmf=true"/><br>
</div><div><span style="white-space:pre-wrap"> </span><action application="export" data="drop_dtmf=true"/></div><div> <!-- Add a bind_meta_app just to make sure that the rfc2833 is still being picked up --></div>
<div><span style="white-space:pre-wrap"> </span> <span style="white-space:pre-wrap"> </span><action application="bind_meta_app" data="4 b s execute_extension::att_xfer XML features"/></div>
<div><span style="white-space:pre-wrap"> </span><action application="set" data="ignore_early_media=true" /></div><div><span style="white-space:pre-wrap"> </span><action application="set" data="ringback=${uk-ring}"/></div>
<div><span style="white-space:pre-wrap"> </span><action application="set" data="call_timeout=30"/></div><div><span style="white-space:pre-wrap"> </span><action application="bridge" data="user/1002"/></div>
<div><span style="white-space:pre-wrap"> </span></condition><br></div><div><span style="white-space:pre-wrap"> </span></extension><br></div><div></include></div><div><br></div><div>I am trying to prevent the DTMF tones from being heard by the b-leg (in this case user/1002). </div>
<div>This works fine if the extension is called by a registered softphone (the user_context is set to public). The digits are pressed and no beeps or tones are heard by the other side.</div><div><br></div><div>If this extension is dialed by a landline/mobile number, when a digit is pressed there is a slight "bleeding" of the DTMF. Enough to distinguish between different digits, though probably not enough to determin the digit pressed.</div>
<div><br></div><div style>I have tried several things such as stop_dtmf in the dialplan, setting the dtmf-duration to 0 (not quite sure what this param does but tried it anyway :) ) in the sip profile but nothing seems to prevent it.<br>
</div><div style><br></div><div style>Could it be our provider? They have confirmed that they use out-of -band rfc2883. But without the drop_dtmf being set in the dialplan the full tone is heard. Could they be sending inband and out-of-band?</div>
<div style><br></div><div style>Could anyone suggest any tests I could run or any log files I could look at please?</div><div style><br></div><div><br></div>Many Thanks<br>Matt<br><br></div></div>