[cisco-voip] DTMF settings in CUCM

[Brian Meade]

CUCM will try to negotiate inband (RFC2833) and out of band.

I don't believe you can edit length of tone or on/off times for RFC2833.

To use true inband, you need a universal transcoder.

It tries to negotiate a few different methods such as Unsolicited Notify,
KPML, and SIP Info (I believe receive but not send on this one).  You can't
hard set to use a certain out of band DTMF method.  It should automatically
negotiate.  You'll have to check the SIP signaling.

On Mon, Aug 28, 2017 at 1:28 PM, Joe Loiacono <jloiacon at csc.com> wrote:

> Having difficulties with a third-party conference phone losing DTMF
> capability.
>
> Does anyone know where to find these settings in CUCM?
>
> In band or Out of band DTMF tones
> Length of tone on and off time
> Out of band DTMF payload type
>
> Thanks,
>
> Joe
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