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

[Wes Sisk]

Jim,

Can you provide more details of your setup and info about your PSTN gateway?

If it is using h323 to communicate with CCM, we may be able to set "mtp
required" on the gateway and have an MTP take the OOB dtmf events and insert
them into the audio stream.  MAYBE.

/Wes

> -----Original Message-----
> From: Jim Brunetti [mailto:jim.brunetti at usa.net]
> Sent: Thursday, July 15, 2004 7:48 AM
> To: Jim Brunetti; Wes Sisk; Jim Brunetti
> Cc: cisco-voip at puck.nether.net
> Subject: Re: [cisco-voip] In-band DTMF with Cisco Call Manager
>
>
> 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
>
>