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<p class="MsoNormal">Hi all,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">We are experiencing problems with DTMF collection using FreeSWITCH 1.4.6. The symptoms are missed or duplicated digits when decoding DTMF sent using RFC 2833 from Cisco phones; for example, given the sequence:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"> 1 2 3 4 5 6 7 8 9 0 #<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">we might typically end up with something like this after FreeSWITCH has processed the received RTP:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"> 1 2 3 5 7 7 8 9 9 #<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Using Wireshark, we can see that all the expected RTP events are present on the wire but FreeSWITCH seems to have difficulty in processing them all consistently. I've tried setting the following manual RTP bugs (bit of guesswork here I'm
afraid, these may or may not be relevant):<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"> IGNORE_DTMF_DURATION<o:p></o:p></p>
<p class="MsoNormal"> ACCEPT_ANY_PACKETS<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">but unfortunately neither made any difference. Are there any other settings we could try which might help? Or is this a known problem with some other workaround?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Regards,<o:p></o:p></p>
<p class="MsoNormal">Chris<o:p></o:p></p>
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<p class="f1e0a5d9-9192-4bbb-bef0-04deb51c40c3"><span style="font-family:Calibri; font-size:medium; ">Chris</span> <span style="font-family:Calibri; font-size:medium; ">Young</span></font></font></font></font><font color="#00a0dc" size="3"><font color="#00a0dc" size="3"><font color="#00a0dc" size="3" face="Calibri"></font></font></font>
<br>
<font color="#00a0dc" size="3"><font color="#00a0dc" size="3"><font color="#00a0dc" size="3" face="Calibri"><span style="font-family:Calibri; font-size:small; color: DodgerBlue; ">Software Engineer</span></font></font></font><font color="#00a0dc" size="3"><font color="#00a0dc" size="3"><font color="#00a0dc" size="3" face="Calibri"><br>
</font></font></font><font color="#00a0dc" size="3"><font color="#00a0dc" size="3"><font color="#00a0dc" size="3" face="Calibri"><img id="IMG1" border="0" src="cid:image05853e.PNG@376d53fe.46b309f7" width="497" height="18"><br>
</font></font></font><font color="#00559a" size="3"><font color="#00559a" size="3"><font color="#00559a" size="3"><font face="Calibri">t:</font></font></font></font><font face="Calibri"><font size="3"><font size="3"> </font></font><font color="#00b0f0" size="3"><font color="#00b0f0" size="3"><font color="#00b0f0" size="3"><span style="font-family:Calibri; font-size:small; color: DodgerBlue; ">+44
118 943 9249</span></font></font></font></font><span lang="EN-GB"><font color="#00559a" size="3"><font color="#00559a" size="3"><font color="#00559a" size="3"><font face="Calibri"><br>
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</font></font></font></span><span lang="EN-GB"><font face="Calibri"><font color="#00b0f0" size="3"><font color="#00b0f0" size="3"><font color="#00b0f0" size="3"><span style="font-family:Calibri; font-size:small; color: DodgerBlue; text-decoration: none; "><span style="font-family:Calibri; font-size:small; color: DodgerBlue; text-decoration: none; "><a href="mailto:Chris.Young@enghouse.com" title="Click to send email to Chris Young" target=""><span style="font-family:Calibri; font-size:small; color: DodgerBlue; text-decoration: none; ">Chris.Young@enghouse.com</span></a></span></span></font></font></font></font></span><font color="#00559a" size="3"><font color="#00559a" size="3"><font color="#00559a" size="3"><font face="Calibri"><br>
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</font></font></span><span style="font-family:Calibri; color: DodgerBlue; font-style: normal; text-decoration: none; "><span style="font-family:Calibri; color: DodgerBlue; font-style: normal; text-decoration: none; "><a href="http://www.enghouseinteractive.co.uk" title="Enghouse Interactive" target=""><span style="font-family:Calibri; color: DodgerBlue; font-style: normal; text-decoration: none; ">www.enghouseinteractive.co.uk</span></a></span></span><font color="#00b0f0" size="3"><font color="#00b0f0" size="3"><font color="#00b0f0" size="3"><span lang="EN-GB"><font face="Calibri"><br>
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