[cisco-voip] DTMF relay with Verizon SIP Trunk?

[Ryan Ratliff]

It's not CUCM you need to worry about, it's the other endpoint you  
are talking to.

-Ryan

On May 28, 2009, at 11:26 PM, Jason Aarons (US) wrote:

What I could use a spreadsheet with what DTMF formats UCCX 7x, Unity  
7x, etc support.  For example I know Unity 7x likes h245 alpha-numeric..

-----Original Message-----
From: matthn at gmail.com [mailto:matthn at gmail.com] On Behalf Of Nick  
Matthews
Sent: Thursday, May 28, 2009 11:18 PM
To: Jason Aarons (US)
Cc: cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] DTMF relay with Verizon SIP Trunk?

The digit drop keyword should only be added if you're doing in-band
(2833 NTE) to out-of-band (SIP notify, kpml, h245 alpha/signal).

This makes the router pull the RTP packet out of the stream when it
sends the out of band message.  If you have SIP-SIP with 2833-to-2833
this will cause a DTMF failure.


-nick

On Thu, May 28, 2009 at 12:02 PM, Jason Aarons (US)
<jason.aarons at us.didata.com> wrote:
> I assume this is the correct DTMF relay for a Verizon SIP trunk.
>
>
>
> Using CallManager 7.0(2), no MTP resources, SIP Trunk to CUBE 12.4 
> (24)T with
> SIP to Verizon.
>
>
>
> At first we had below, then I realized DTMF was working;
>
> dial-peer voice 797 voip
>
> no dtmf-relay h245-alphanumeric h245-signal cisco-rtp
>
> dtmf-relay rtp-nte digit-drop
>
>
>
>
>
> Does faxing/VG224 have any dtmf-relay requirements?  I understand  
> they were
> using rtp-nte digit-drop but changed it for some unknown reason to
> h245-alphanumic which I understand is only for H323.
>
>
>
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