<div dir="ltr">I had the opportunity to capture the data to/from the phone. I used this packet capture command, on the FS host itself:<div><br></div><div># /usr/sbin/tcpdump -p -s 0 -w jon.pcap -i eth1 host 192.168.4.235</div>
<div><div>10169 packets captured</div><div>10169 packets received by filter</div><div>0 packets dropped by kernel</div><div><br></div><div style>The number dialed was 18002729872, the IRS EFTPS IVR. The first voice prompt is to enter the 9-digit taxpayer identification number.</div>
<div style><br></div><div style>In Wireshark, I can clearly see the numbers being entered, as RFC2833 RTP DTMF events. One thing I notice is that I get several RTP packets for each digit. (I assume that's normal, but I'm new at this.) For example, here is one digit:</div>
<div style><br></div><div style>6507<span class="" style="white-space:pre"> </span>87.427666<span class="" style="white-space:pre"> </span>192.168.4.235<span class="" style="white-space:pre"> </span>192.168.4.1<span class="" style="white-space:pre"> </span>RTP EVENT<span class="" style="white-space:pre"> </span>60<span class="" style="white-space:pre"> </span>Payload type=RTP Event, DTMF Two 2<br>
</div><div style>6508<span class="" style="white-space:pre"> </span>87.431287<span class="" style="white-space:pre"> </span>192.168.4.1<span class="" style="white-space:pre"> </span>192.168.4.235<span class="" style="white-space:pre"> </span>RTP<span class="" style="white-space:pre"> </span>214<span class="" style="white-space:pre"> </span>PT=ITU-T G.711 PCMU, SSRC=0x71C6FAAF, Seq=14414, Time=499365981 <br>
</div><div style>6509<span class="" style="white-space:pre"> </span>87.447662<span class="" style="white-space:pre"> </span>192.168.4.235<span class="" style="white-space:pre"> </span>192.168.4.1<span class="" style="white-space:pre"> </span>RTP EVENT<span class="" style="white-space:pre"> </span>60<span class="" style="white-space:pre"> </span>Payload type=RTP Event, DTMF Two 2<br>
</div><div style>6510<span class="" style="white-space:pre"> </span>87.451285<span class="" style="white-space:pre"> </span>192.168.4.1<span class="" style="white-space:pre"> </span>192.168.4.235<span class="" style="white-space:pre"> </span>RTP<span class="" style="white-space:pre"> </span>214<span class="" style="white-space:pre"> </span>PT=ITU-T G.711 PCMU, SSRC=0x71C6FAAF, Seq=14415, Time=499366141 <br>
</div><div style>6511<span class="" style="white-space:pre"> </span>87.467655<span class="" style="white-space:pre"> </span>192.168.4.235<span class="" style="white-space:pre"> </span>192.168.4.1<span class="" style="white-space:pre"> </span>RTP EVENT<span class="" style="white-space:pre"> </span>60<span class="" style="white-space:pre"> </span>Payload type=RTP Event, DTMF Two 2<br>
</div><div style>6512<span class="" style="white-space:pre"> </span>87.471284<span class="" style="white-space:pre"> </span>192.168.4.1<span class="" style="white-space:pre"> </span>192.168.4.235<span class="" style="white-space:pre"> </span>RTP<span class="" style="white-space:pre"> </span>214<span class="" style="white-space:pre"> </span>PT=ITU-T G.711 PCMU, SSRC=0x71C6FAAF, Seq=14416, Time=499366301 <br>
</div><div style>6513<span class="" style="white-space:pre"> </span>87.487656<span class="" style="white-space:pre"> </span>192.168.4.235<span class="" style="white-space:pre"> </span>192.168.4.1<span class="" style="white-space:pre"> </span>RTP EVENT<span class="" style="white-space:pre"> </span>60<span class="" style="white-space:pre"> </span>Payload type=RTP Event, DTMF Two 2<br>
</div><div style>6514<span class="" style="white-space:pre"> </span>87.491286<span class="" style="white-space:pre"> </span>192.168.4.1<span class="" style="white-space:pre"> </span>192.168.4.235<span class="" style="white-space:pre"> </span>RTP<span class="" style="white-space:pre"> </span>214<span class="" style="white-space:pre"> </span>PT=ITU-T G.711 PCMU, SSRC=0x71C6FAAF, Seq=14417, Time=499366461 <br>
</div><div style>6515<span class="" style="white-space:pre"> </span>87.507665<span class="" style="white-space:pre"> </span>192.168.4.235<span class="" style="white-space:pre"> </span>192.168.4.1<span class="" style="white-space:pre"> </span>RTP EVENT<span class="" style="white-space:pre"> </span>60<span class="" style="white-space:pre"> </span>Payload type=RTP Event, DTMF Two 2<br>
</div><div style>6516<span class="" style="white-space:pre"> </span>87.511285<span class="" style="white-space:pre"> </span>192.168.4.1<span class="" style="white-space:pre"> </span>192.168.4.235<span class="" style="white-space:pre"> </span>RTP<span class="" style="white-space:pre"> </span>214<span class="" style="white-space:pre"> </span>PT=ITU-T G.711 PCMU, SSRC=0x71C6FAAF, Seq=14418, Time=499366621 <br>
</div><div style>6517<span class="" style="white-space:pre"> </span>87.527677<span class="" style="white-space:pre"> </span>192.168.4.235<span class="" style="white-space:pre"> </span>192.168.4.1<span class="" style="white-space:pre"> </span>RTP EVENT<span class="" style="white-space:pre"> </span>60<span class="" style="white-space:pre"> </span>Payload type=RTP Event, DTMF Two 2 (end)<br>
</div><div style>6518<span class="" style="white-space:pre"> </span>87.531284<span class="" style="white-space:pre"> </span>192.168.4.1<span class="" style="white-space:pre"> </span>192.168.4.235<span class="" style="white-space:pre"> </span>RTP<span class="" style="white-space:pre"> </span>214<span class="" style="white-space:pre"> </span>PT=ITU-T G.711 PCMU, SSRC=0x71C6FAAF, Seq=14419, Time=499366781 <br>
</div><div style>6519<span class="" style="white-space:pre"> </span>87.547688<span class="" style="white-space:pre"> </span>192.168.4.235<span class="" style="white-space:pre"> </span>192.168.4.1<span class="" style="white-space:pre"> </span>RTP EVENT<span class="" style="white-space:pre"> </span>60<span class="" style="white-space:pre"> </span>Payload type=RTP Event, DTMF Two 2 (end)<br>
</div><div style>6520<span class="" style="white-space:pre"> </span>87.551336<span class="" style="white-space:pre"> </span>192.168.4.1<span class="" style="white-space:pre"> </span>192.168.4.235<span class="" style="white-space:pre"> </span>RTP<span class="" style="white-space:pre"> </span>214<span class="" style="white-space:pre"> </span>PT=ITU-T G.711 PCMU, SSRC=0x71C6FAAF, Seq=14420, Time=499366941 <br>
</div><div style>6521<span class="" style="white-space:pre"> </span>87.567658<span class="" style="white-space:pre"> </span>192.168.4.235<span class="" style="white-space:pre"> </span>192.168.4.1<span class="" style="white-space:pre"> </span>RTP EVENT<span class="" style="white-space:pre"> </span>60<span class="" style="white-space:pre"> </span>Payload type=RTP Event, DTMF Two 2 (end)<br>
</div><div style><br></div><div style>This sequence happens 9 times with different numbers, as the 9-digit TIN is entered. At 80.5 seconds (according to the Wireshark player), the called party says: "The tax identification number must be nine digits. Please re-enter." The last digit event was at timestamp 2495866430 (phone) or 499404541 (FS). I don't know how to convert RTP timestamps to actual time.</div>
<div style><br></div><div style>What's the next step to diagnosing the problem?</div><div style><br></div><div style>-- </div><div style>Steve</div><div class="gmail_extra"><br><br><div class="gmail_quote">On Thu, May 9, 2013 at 1:14 PM, Michael Collins <span dir="ltr"><<a href="mailto:msc@freeswitch.org" target="_blank">msc@freeswitch.org</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div dir="ltr"><div>Are you sending in-band DTMFs or RFC2833? Or both? Get a pcap of the call, including the RTP, and analyze it in Wireshark. See what you are actually sending. That means looking at the flow (to see if you send RTPEVENTS, i.e. RFC2833 DTMFs) and also listening to the decoded audio with the player.<br>
<br></div>-MC<br></div><div class="gmail_extra"><br><br><div class="gmail_quote"><div><div class="h5">On Thu, May 9, 2013 at 12:59 PM, Steven Schoch <span dir="ltr"><<a href="mailto:schoch+freeswitch.org@xwin32.com" target="_blank">schoch+freeswitch.org@xwin32.com</a>></span> wrote:<br>
</div></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div><div class="h5"><div dir="ltr">One of my users complains of many problems calling automated systems that take DTMF input. In this case it was an IRS payment entry system that would skip or duplicate button presses.<div>
<br></div><div>
Our setup is pretty generic:</div><div>Polycom SoundPoint IP 320 SIP -> dedicated LAN -> Freeswitch (on CentOS, on XenServer) -> Comcast static IP -> Flowroute.com -> some IRS 800 number.</div><div>
<br></div><div>Is this just the way it is, or is there something I can do to make it work better?</div><span><font color="#888888"><div><br></div><div>-- </div><div>Steve</div></font></span></div></div></div></blockquote>
</div></div></blockquote></div><br></div></div></div>