<HTML><BODY style="word-wrap: break-word; -khtml-nbsp-mode: space; -khtml-line-break: after-white-space; ">Greg,<DIV><BR class="khtml-block-placeholder"></DIV><DIV>"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.</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>Recommend you confirm with carrier that they are configured for 2833 and not inband.</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>/Wes</DIV><DIV><BR><DIV><DIV>On Oct 21, 2006, at 8:05 PM, Hinson, Greg wrote:</DIV><BR class="Apple-interchange-newline"> <DIV class="Section1"><P class="MsoNormal"><FONT size="2" face="Tahoma"><SPAN style="font-size:10.0pt; font-family:Tahoma;mso-bidi-font-family:" times="" new="" roman""="">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></FONT></P><P class="MsoNormal"><FONT size="2" face="Tahoma"><SPAN style="font-size:10.0pt; font-family:Tahoma;mso-bidi-font-family:" times="" new="" roman""="">1) <SPAN class="GramE">originating</SPAN> from the CME router, or <O:P></O:P></SPAN></FONT></P><P class="MsoNormal"><FONT size="2" face="Tahoma"><SPAN style="font-size:10.0pt; font-family:Tahoma;mso-bidi-font-family:" times="" new="" roman""="">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></FONT></P><P class="MsoNormal"><FONT size="2" face="Tahoma"><SPAN style="font-size:10.0pt; font-family:Tahoma;mso-bidi-font-family:" times="" new="" roman""=""><O:P> </O:P></SPAN></FONT></P><P class="MsoNormal"><FONT size="2" face="Tahoma"><SPAN style="font-size:10.0pt; font-family:Tahoma;mso-bidi-font-family:" times="" new="" roman""="">Any ideas on why DTMF is failing?<O:P></O:P></SPAN></FONT></P><P class="MsoNormal"><FONT size="2" face="Tahoma"><SPAN style="font-size:10.0pt; font-family:Tahoma;mso-bidi-font-family:" times="" new="" roman""=""><O:P> </O:P></SPAN></FONT></P><P class="MsoNormal"><FONT size="2" face="Tahoma"><SPAN style="font-size:10.0pt; font-family:Tahoma;mso-bidi-font-family:" times="" new="" roman""=""><O:P> </O:P></SPAN></FONT></P><P class="MsoNormal"><FONT size="2" face="Tahoma"><SPAN style="font-size:10.0pt; font-family:Tahoma;mso-bidi-font-family:" times="" new="" roman""="">-Greg</SPAN></FONT><O:P></O:P></P><P class="MsoNormal"><FONT size="3" face="Times New Roman"><SPAN style="font-size: 12.0pt"><O:P> </O:P></SPAN></FONT></P> </DIV> <DIV><DIV><BR class="khtml-block-placeholder"></DIV><HR> This message and any attachments are intended only for the use of the addressee and may contain information that is privileged and confidential. If the reader of the message is not the intended recipient or an authorized representative of the intended recipient, you are hereby notified that any dissemination of this communication is strictly prohibited. If you have received this communication in error, please notify us immediately by e-mail and delete the message and any attachments from your system. <DIV><BR class="khtml-block-placeholder"></DIV></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">_______________________________________________</DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">cisco-voip mailing list</DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><A href="mailto:cisco-voip@puck.nether.net">cisco-voip@puck.nether.net</A></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><A href="https://puck.nether.net/mailman/listinfo/cisco-voip">https://puck.nether.net/mailman/listinfo/cisco-voip</A></DIV> </DIV><BR></DIV></BODY></HTML>