[cisco-voip] SCCP ip phones and in-band DTMF problem

[Nick Matthews]

You can create a transcoder on CME, and it will convert the SCCP out
of band DTMF to in-band DTMF.

-nick

On Mon, Oct 17, 2011 at 2:00 PM, Robert Hass <robhass at gmail.com> wrote:
> Hi
> I've got below infrastructure:
> - 50 SCCP IP Phones (mailny 7941 and 7961)
> - 2 analog faxes
> - CUCME running IOS 15.0M at Cisco 3825 with PVDM2-64
> - two trunks to PSTN : first via E1/PRI and second via H.323
>
> I have problem with DTMF (it's not working at all) when traffic to PSTN is
> pushed via H.323 peer. I contacted with telco provider and they supports
> only in-band DTMF. I tested if it's working and I DTMF is indeed working when
> tested in from analog line. It's look like in-band DTMF is not supported
> when calls are done from SCCP phones.
>
> Do exist and solution to my problem ? Maybe I should change software on
> phones from SCCP to SIP or reconfigure something inside PSTN H.323 dial-peer ?
>
> Dial-Peer configuration:
>
> dial-peer voice 4000 voip
>  translation-profile outgoing 1
>  destination-pattern 0T
>  session target ipv4:x.x.x.x
>  codec g711alaw
>  clid strip name
>  no vad
> !
>
> Thanks,
> Robert
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