[Freeswitch-users] Inband DTMF Problem

Wed Nov 5 13:11:44 PST 2008

dont forget to try what i said,
use the flush_dtmf before playback

On Wed, Nov 5, 2008 at 2:30 PM, Klaus Teller <klaus.teller at gmx.net> wrote:

> Hi Anthony,
>
> Let me add some few facts.
>
> 1) I am sending DTMF using RFC2833 and the IVR is using Inband
> 2) The problem is not limited to when i send DTMF. It also happens when i
> try to play a file.
> 3) The functions are from my java code. They send commands to Freeswitch
> via socket interface.
> 4) The same functions are working perfectly when the remote IVR sends DTMF
> via RFC2833.
> 5) I have a pause of 2000 ms after sending the DTMF.
>
>
> Let me reformulate my problem. I have a spurious dtmf-# being detected by
> freeswitch where nothing was sent by the other party.
>
> The strange thing to me is that Wireschark (running on the same machine as
> Freeswitch) detects the proper digit sequence.
>
> Klaus.
>
>
> -------- Original-Nachricht --------
> > Datum: Wed, 5 Nov 2008 11:26:51 -0600
> > Von: "Anthony Minessale" <anthony.minessale at gmail.com>
> > An: freeswitch-users at lists.freeswitch.org
> > Betreff: Re: [Freeswitch-users] Inband DTMF Problem
>
> > is the send dtmf inband as well?
> > did you try doing a pause after send dtmf to give it time to deliver it?
> > I still don't quite get what you are saying because i don't recognize the
> > functions in your example.
> >
> > for good measure i added 2 new commands to FS
> >
> > the flush_dtmf application you can execute before playing the file
> >
> > and the uuid_flush_dtmf api command you can send to an arbitrary uuid
> > maybe try those
> >
> >
> > On Wed, Nov 5, 2008 at 9:59 AM, Klaus Teller <klaus.teller at gmx.net>
> wrote:
> >
> > > HI,
> > >
> > > I'm attaching the console log and event-socket traffic. In the latter
> > case,
> > > i gathered only the last few Digits (including the spurious one).
> > >
> > > I also have the wireshark trace that i can send you off the list if you
> > > wish.
> > >
> > > We ran the same IVR (VoiceXML App) with a platform that supports
> RFC2833
> > i
> > > didn't have this problem. With this platform we unfortunately don't
> have
> > > this feature available.
> > >
> > >
> > > Klaus.
> > >
> > > -------- Original-Nachricht --------
> > > > Datum: Wed, 5 Nov 2008 09:14:02 -0600
> > > > Von: "Anthony Minessale" <anthony.minessale at gmail.com>
> > > > An: freeswitch-users at lists.freeswitch.org
> > > > Betreff: Re: [Freeswitch-users] Inband DTMF Problem
> > >
> > > > gather a console log at debug level and a trace of the event_socket
> > > > traffic.
> > > >
> > > >
> > > > On Wed, Nov 5, 2008 at 9:08 AM, Klaus Teller <klaus.teller at gmx.net>
> > > wrote:
> > > >
> > > > > Hi Folks,
> > > > >
> > > > > It's me again with a DTMF issue. Here is what's going on. I have a
> > > > remote
> > > > > IVR and i'm writing some code to communicate with it, exercise it,
> > and
> > > > test
> > > > > it. The remote IVR is playing DTMF as inband.
> > > > >
> > > > > Right now, Freeswitch can detect all DTMF digits from the IVR. The
> > > > > interaction between my code and the IVR is essentially  a
> > combination
> > > of
> > > > >  playing files and sending and reading DTMFs.
> > > > >
> > > > > The issue: whenever my code plays a file or send a DTMF digit, the
> > > > > following attempt to read DTMF fails. By failing i mean that there
> > will
> > > > be a
> > > > > spurious DTMF detected by Freeswitch that was not sent by the IVR.
> > > > >
> > > > > That is, if i have something like:
> > > > >
> > > > > sendDTMF("3"); getDigits("38373", "#");  // # is the termination
> > > > character
> > > > >
> > > > > After executing the sendDTMF, getDigits fails because it
> immediately
> > > > > detects a pound. Yet this pound is not sent by the IVR. I can check
> > > this
> > > > by
> > > > > having wireshark running both on the IVR's computer and on
> > Freeswitch's
> > > > > computer.
> > > > >
> > > > > Any idea what may be causing this problem? Is there some sort of
> > Echo
> > > > going
> > > > > on or something like that?
> > > > >
> > > > > Thanks,
> > > > > Klaus.
> > > > >
> > > > >
> > > > > --
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> > > >
> > > >
> > > > --
> > > > Anthony Minessale II
> > > >
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> > > >
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> > --
> > Anthony Minessale II
> >
> > FreeSWITCH http://www.freeswitch.org/
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> >
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> >
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> >
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-- 
Anthony Minessale II

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