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

[Jim Brunetti]

We were running the test using speakerphone just as you suspected.

One thing we have just tried is to use Cisco's new IP-IP Gateway software and
install a 7200 between our Nextone and
the CCM (make the Cisco 7200 be an IP-IP gateway instead of an IP-PSTN
gateway) but are still having problems.  Has anyone used this software
before?  Is it capable of terminating DTMF-relay on the one IP leg
facing the CCM and originating inband DTMF on the other leg facing our
Sonus?


Jim Brunetti <jim.brunetti at usa.net> wrote:

> 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
> 
> 
> 






jim.brunetti at usa.net