[cisco-voip] CUCM SIP trunk and Acme VM edition

[Tim Smith]

Hi Guys,

I have a bit of an integration problem here.

Our SIP provider does not currently support RFC2833 DTMF.
Instead they use only in-band audio tones.

We are running an Acme Packet SBC virtual edition which does not have DSPs
and cannot convert the RFC2833 to audio tones.
Inbound DTMF from audio to RFC2833 works fine with an MTP.

Is there any way with CUCM 8.6 and an IOS transcoder (no CUBE or IPIPGW)
that we could do this conversion?
We did try G729 to G711 transcoding, and it did not work.
I'm assuming CUBE works because it terminates both legs of the call and is
aware of what DTMF is supported on both side.

We will have RFC2833 from the provider in a month or so, so that will be
the best fix. Just wondering if there is any interim fix.
I think we are out of luck, but thought I would ask.

Cheers,

Tim.
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