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A collegue of mine spent 32 hours on the phone with TAC and Verzion due to a similar issue.<BR>
<BR>
I don't remember the specifics of what he was running into, but in short, this is what he required:<BR>
<BR>
You need 12.4.22(T2)<BR>
You need H.323 faststart which requires MTP<BR>
You need to configure MTP resources in the router as software<BR>
You need to make sure your MRGs are set to use the above MTP and Not any other hardware transcoders or software MTPs.<BR>
<BR>
Good Luck?<BR> > <BR>> <BR>> ----------------------------------------------------------------------<BR>> <BR>> Message: 1<BR>> Date: Thu, 28 May 2009 12:02:13 -0400<BR>> From: "Jason Aarons (US)" <jason.aarons@us.didata.com><BR>> To: <cisco-voip@puck.nether.net><BR>> Subject: [cisco-voip] DTMF relay with Verizon SIP Trunk?<BR>> Message-ID:<BR>> <C1FE15183DA37645BC0633BC604E44F00EF56C88@USNAEXCH.na.didata.local><BR>> Content-Type: text/plain; charset="us-ascii"<BR>> <BR>> I assume this is the correct DTMF relay for a Verizon SIP trunk.<BR>> <BR>> <BR>> <BR>> Using CallManager 7.0(2), no MTP resources, SIP Trunk to CUBE 12.4(24)T<BR>> with SIP to Verizon.<BR>> <BR>> <BR>> <BR>> At first we had below, then I realized DTMF was working;<BR>> <BR>> dial-peer voice 797 voip<BR>> <BR>> no dtmf-relay h245-alphanumeric h245-signal cisco-rtp<BR>> <BR>> dtmf-relay rtp-nte digit-drop<BR>> <BR>> <BR>> <BR>> <BR>> <BR>> Does faxing/VG224 have any dtmf-relay requirements? I understand they<BR>> were using rtp-nte digit-drop but changed it for some unknown reason to<BR>> h245-alphanumic which I understand is only for H323.<BR>> <BR>> <BR>> <BR>> <BR>> <BR><br /><hr />HotmailŪ has a new way to see what's up with your friends. <a href='http://windowslive.com/Tutorial/Hotmail/WhatsNew?ocid=TXT_TAGLM_WL_HM_Tutorial_WhatsNew1_052009' target='_new'>Check it out.</a></body>
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