[cisco-voip] In-band DTMF with Cisco Call Manager

[Jim Brunetti]

The MASERGY VoIP network is configured to support the following combination of
codecs & DTMF signaling:
 
1--G.711, utilizing inband signaling. The DTMF tones are actually passed
through the RTP audio stream without utilizing RFC 2833; and,
2--G.729 with RFC 2833.

Our customer with the CCM is using G.711.  The CCM talks to a Nextone box via
H.323.  The Nextone converts H.323 to SIP and passes the traffic to our SONUS
PSTN gateway.

"Walenta, Phil" <philip.walenta at berbee.com> wrote:

> What sort of gateway is it?
> 
> ________________________________
> 
> From: cisco-voip-bounces at puck.nether.net on behalf of Jim Brunetti
> Sent: Sat 7/10/2004 2:40 PM
> To: Wes Sisk; Jim Brunetti; cisco-voip at puck.nether.net
> Subject: RE: [cisco-voip] In-band DTMF with Cisco Call Manager
> 
> 
> 
> The problem is actually between my PSTN gateway and the CCM (I'm guessing).
> The CCM is doing dtmf-relay which my gateway does not support.  The weird
> thing about all of this is that when we first set everything up, we were
> seeing inband DTMF from the phone/CCM and everything worked great.  A few
days
> later it magically changed to H245 and no one knows why or how to switch it
> back.
> 
> 
> 
> 






jim.brunetti at usa.net