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<p class=MsoNormal><font size=2 color=black face=Tahoma><span style='font-size:
10.0pt;font-family:Tahoma;mso-bidi-font-family:"Times New Roman";color:black'>Thanks
for the reply Wes. You're thinking that maybe <span class=SpellE>ViaTalk</span>
is providing an in-band version of DTMF that isn't RFC2833? <span class=GramE>Makes
sense.</span> My ip phone doesn't actually generate a "DTMF" tone
when digits are dialed, so if they are expecting a form of in-band you
mentioned below, this probably won't work. I was thinking a possible workaround
is registering an ATA to CME and having some analog phones hang off of the ATA.
With that in place, I could make the same <span class=GramE>call,</span> rely
on my analog phone to create an "in-band dtmf" which may work in this
scenario?<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Tahoma><span style='font-size:
10.0pt;font-family:Tahoma;mso-bidi-font-family:"Times New Roman";color:black'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Tahoma><span style='font-size:
10.0pt;font-family:Tahoma;mso-bidi-font-family:"Times New Roman";color:black'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Tahoma><span style='font-size:
10.0pt;font-family:Tahoma;mso-bidi-font-family:"Times New Roman";color:black'>-Greg</span></font><o:p></o:p></p>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'> Wes Sisk
[mailto:wsisk@cisco.com] <br>
<b><span style='font-weight:bold'>Sent:</span></b> Sunday, October 22, 2006
8:32 AM<br>
<b><span style='font-weight:bold'>To:</span></b> Hinson, Greg<br>
<b><span style='font-weight:bold'>Cc:</span></b> cisco-voip@puck.nether.net<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [cisco-voip] DTMF
failing</span></font><o:p></o:p></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Greg,<o:p></o:p></span></font></p>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>"inband" is not necessarily rfc2883. We have seen
several carriers requesting DTMF truly 'inband' in the audio stream - meaning
the tone is directly in the audio stream. I have not seen a way to allow
this with a CCM/CME integration yet - the carrier needs to switch to truly
using rfc2833. For rfc2833, notification of the DTMF event is sent in the
RTP stream, but it is sent as an RTP packet with different payload type
indicating it is a DTMF event.<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
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<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Recommend you confirm with carrier that they are configured for 2833
and not inband.<o:p></o:p></span></font></p>
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<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
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<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>/Wes<o:p></o:p></span></font></p>
</div>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
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<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>On Oct 21, 2006, at 8:05 PM, Hinson, Greg wrote:<o:p></o:p></span></font></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
size=2 face=Tahoma><span times="" new=""><span style='font-size:10.0pt;
font-family:Tahoma'>I have a CallManager Express router with registered IP <span
class=grame>phones, that</span> utilize a SIP trunk through my ISP for PSTN
service. DTMF-relay fails from IP phone to PSTN endpoint. My SIP trunk provider
tells me that I need to send my dtmf digits in-band, using RFC2833. According
to the docs, I can force this at my voip dial-peers with "dtmf-relay
rtp-nte" statement applied, but yet I am still having the problem. Whether
the call is:<O:P></O:P></span></span></font><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
size=2 face=Tahoma><span times="" new=""><span style='font-size:10.0pt;
font-family:Tahoma'>1) <span class=grame>originating</span> from the CME
router, or <O:P></O:P></span></span></font><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
size=2 face=Tahoma><span times="" new=""><span style='font-size:10.0pt;
font-family:Tahoma'>2) <span class=grame>from</span> an Enterprise 4.1.3(SR2)
CallManager - SIP <span class=spelle>trunked</span> to my CME router, to a
second SIP trunk for the PSTN.<O:P></O:P></span></span></font><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
size=2 face=Tahoma><span times="" new=""><O:P><span style='font-size:10.0pt;
font-family:Tahoma'> </O:P></span></span></font><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
size=2 face=Tahoma><span times="" new=""><span style='font-size:10.0pt;
font-family:Tahoma'>Any ideas on why DTMF is failing?<O:P></O:P></span></span></font><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
size=2 face=Tahoma><span times="" new=""><O:P><span style='font-size:10.0pt;
font-family:Tahoma'> </O:P></span></span></font><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
size=2 face=Tahoma><span times="" new=""><O:P><span style='font-size:10.0pt;
font-family:Tahoma'> </O:P></span></span></font><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
size=2 face=Tahoma><span times="" new=""><span style='font-size:10.0pt;
font-family:Tahoma'>-Greg</span></span></font><O:P></O:P><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
size=3 face="Times New Roman"><span style='font-size:12.0pt'><O:P> </O:P><o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
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