[cisco-voip] Inband (in audio stream) DTMF

[Ryan Ratliff (rratliff)]

You’re going to want to go the transcoder route because none of our phones (to my knowlege) support true inband DTMF.

-Ryan

On May 8, 2015, at 2:11 PM, Brian Meade <bmeade90 at vt.edu<mailto:bmeade90 at vt.edu>> wrote:

Also there's no way to signal true inband in SDP I know of.  It's not something that is negotiated as far as I know.  Endpoint just has to support it or rely on the universal transcoder.

On Fri, May 8, 2015 at 2:06 PM, Brian Meade <bmeade90 at vt.edu<mailto:bmeade90 at vt.edu>> wrote:
Only way I've ever seen forcing true inband working was using a universal transcoder.

On Fri, May 8, 2015 at 1:58 PM, Tommy Schlotterer <tschlotterer at netechcorp.com<mailto:tschlotterer at netechcorp.com>> wrote:
I am working at integrating a 3rd party TTY server into a customer’s environment. The software requires inband(NOT RFC2833 which is sometimes called inband).

What am I looking for in the SDP to signal inband DTMF, how do I set it up on the gateway and CCM sides?

Thanks

Tommy

Tommy Schlotterer | Systems Engineer
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