[cisco-voip] UC500 sip to CM7.0 DTMF problem

[Mike O]

I'am able to use DTMF tones for Unity from phones registered from the UC500, 
but if I go out the PSTN I lose DTMF. I think MGCP uses out of band DTMF 
correct and dtmf-relay rtp-nte uses inband I believe.
----- Original Message ----- 
From: "Nick Matthews" <matthnick at gmail.com>
To: "Mike O" <mikeeo at msn.com>
Cc: <cisco-voip at puck.nether.net>
Sent: Sunday, October 04, 2009 10:36 PM
Subject: Re: [cisco-voip] UC500 sip to CM7.0 DTMF problem


> Probably a dial peer problem on the UC520.  (By the way, UC520 isn't
> supported with CUCM.  Probably works, but it's not something TAC will
> look at.)
>
> MGCP DTMF is fairly robust, so it's not my first suspicion.
>
>
> -nick
>
> On Sat, Oct 3, 2009 at 9:32 PM, Mike O <mikeeo at msn.com> wrote:
>> I'm having a problem with outbound DTMF. Internal calls DTMF work fine, 
>> but
>> PSTN calls don't work.
>>
>> The call flow is:
>>
>> UC500>CM7>MCGP(2811)>PRI-PSTN
>>
>> I think MGCP is dropping the DTMF tones.
>>
>> Any ideas?
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>>
>>
>