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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Tahoma","sans-serif";color:#1F497D">Audio was captured using “record_session” where it didn’t appear in the audio by “ear”.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Tahoma","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Tahoma","sans-serif";color:#1F497D">“ftdm dump” displays details about the span I tell it to: -<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Tahoma","sans-serif";color:#1F497D">ani:<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Tahoma","sans-serif";color:#1F497D">cause: NONE<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Tahoma","sans-serif";color:#1F497D">etc…<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Tahoma","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> freeswitch-users-bounces@lists.freeswitch.org [mailto:freeswitch-users-bounces@lists.freeswitch.org]
<b>On Behalf Of </b>Michael Collins<br>
<b>Sent:</b> 03 April 2012 16:31<br>
<b>To:</b> FreeSWITCH Users Help<br>
<b>Subject:</b> Re: [Freeswitch-users] Strange DTMF Tones On Inbound Calls<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">On Tue, Apr 3, 2012 at 8:17 AM, Daniel Knaggs <<a href="mailto:Daniel.Knaggs@realitysolutions.co.uk">Daniel.Knaggs@realitysolutions.co.uk</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:8.0pt;font-family:"Tahoma","sans-serif";color:#1F497D">Update, it would appear (so far) that this has worked.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:8.0pt;font-family:"Tahoma","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:8.0pt;font-family:"Tahoma","sans-serif";color:#1F497D">I can see in the log numerous “Rogue digit: DTMF 'A' received” entries (and also for “C”) and I’ve
asked the users if they have heard any more tones and they haven’t.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:8.0pt;font-family:"Tahoma","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:8.0pt;font-family:"Tahoma","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:8.0pt;font-family:"Tahoma","sans-serif";color:#1F497D">Thanks, Michael. So we’ve managed to work around it, but how can I track down what is generating
these tones to begin with? Is my earlier spectrum analysis of a call any good?</span><o:p></o:p></p>
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<p class="MsoNormal"><br>
I don't think we ever truly answered the question of whether or not these rogue digits are phantoms. Remind me: how did you capture the audio on which you did the spectrum analysis? I recommend using ftdm dump, which is nice because it captures raw audio in
either direction, and if I understand correctly it is what's "on the line" - if those rogue digits are coming from the other end they'll show up in the raw dump. If those digits are not in the raw audio then most likely you're looking at a false positive from
the DTMF detector, in which case you've got a bit of a conundrum because you've got hardware from Digium and software from Sangoma and you need to figure out where to begin looking...<br>
<br>
BTW, feel free to keep the BDA's in there and just add your transfer digits to the digit action realm and you can avoid using bind meta app. BDA is the preferred method nowadays.<br>
<br>
-MC<o:p></o:p></p>
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