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

[Jim Brunetti]

Thanks, Wes.  I'm pretty sure the phones are 7960G phones.  I will find out if
they were testing using the speakerphone.  Supposedly things stopped working
after some patches were applied to the CCM, so this explanation makes sense. 
In the meantime, I have heard that using a 7200 as a Voice Gateway in between
the CCM and my Nextone/Sonus could help with this problem.  Any recommended
IOS versions for a 7204?

Wes Sisk <wsisk at cisco.com> wrote:

> Jim,
> 
> Very old 7960 phone loads generated the true DTMF tone when using 
> speakerphone so that output of the speaker was picked up by the mic and 
> the tone appeared inband.  We changed the speaker tone to be a generic 
> "beep" instead of the true DTMF tone becuase some destinations were 
> detecting doubld DTMF OOB and in band.
> 
> Other than this, I have never heard of the 7960 sending digits inband 
> when using SCCP phone loads.  The SIP and MGCP phone loads for the 7960 
> appear to have this option.
> 
> Can you clarify what model ipphones you are using?
> 
> /Wes
> 
> Jim Brunetti wrote:
> 
> >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.
> >
> >"Wes Sisk" <wsisk at cisco.com> wrote:
> >
> >  
> >
> >>AFAIK, It's not possible.  All dtmf events must be sent as SCCP events to
> >>CCM for IPPhones.
> >>
> >>/Wes
> >>
> >>    
> >>
> >>>-----Original Message-----
> >>>From: cisco-voip-bounces at puck.nether.net
> >>>[mailto:cisco-voip-bounces at puck.nether.net]On Behalf Of Jim Brunetti
> >>>Sent: Saturday, July 10, 2004 11:49 AM
> >>>To: cisco-voip at puck.nether.net
> >>>Subject: [cisco-voip] In-band DTMF with Cisco Call Manager
> >>>
> >>>
> >>>
> >>>Anyone know how to set DTMF signaling to be in-band using Call Manager
> >>>3.3 and a 7960 IP phone? The phone is using Skinny to talk to the Call
> >>>Manager.
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>jim.brunetti at usa.net
> >>>
> >>>
> >>>
> >>>_______________________________________________
> >>>cisco-voip mailing list
> >>>cisco-voip at puck.nether.net
> >>>https://puck.nether.net/mailman/listinfo/cisco-voip
> >>>      
> >>>
> >>    
> >>
> >
> >
> >
> >
> >
> >
> >jim.brunetti at usa.net
> >
> >
> >  
> >
> 






jim.brunetti at usa.net