[Freeswitch-users] Inband DTMF Problem

[Klaus Teller]

I'm updating now and will try the flush dtmf. I yet have a hard time understanding how this is related to sending DTMF (instead of reading DTMF). This because: 

1) The same problem appears when i replace sending DTMF with playing an audio file
2) Introducing a delay between READING Dtmf and playing the file prevents the issue to appear.

Ideas?

Klaus.



-------- Original-Nachricht --------
> Datum: Wed, 5 Nov 2008 15:24:33 -0600
> Von: "Anthony Minessale" <anthony.minessale at gmail.com>
> An: freeswitch-users at lists.freeswitch.org
> Betreff: Re: [Freeswitch-users] Inband DTMF Problem

> When you call send dtmf and it's rfc2833 you must sleep to give it a
> chance
> to send.
> the variable last_dtmf_duration is always set on the channel with how long
> you should execute sleep
> on the channel in the case of 2833
> 
> so call send_dtmf
> execute sleep ${last_dtmf_duration}
> 
> 
> 
> On Wed, Nov 5, 2008 at 3:08 PM, Klaus Teller <klaus.teller at gmx.net> wrote:
> 
> > OK, we made some progress on this issue. It appears that if we introduce
> > 50ms delay between the reading (not playing) of the DTMF and the playing
> of
> > the file (or the sending of DTMF), the problem doesn't occur. And if we
> > place many such calls this delay needs to be increased.
> >
> >
> > What i suspect is happening is that there is some sort of race condition
> or
> > interference between the event processing part of Freeswitch and the
> > handling of synchronous commands such as sending dtmf. I recall Anthony
> > saying few days ago that event delivery is paused when a command
> execution
> > request arrives. So, would it be possible that command execution
> requests
> > are able to interfere on the deliverying of events?
> >
> > Thanks,
> > Klaus.
> >
> >
> >
> >
> > -------- Original-Nachricht --------
> > > Datum: Wed, 5 Nov 2008 14:35:16 -0600
> > > Von: Brian West <brian at freeswitch.org>
> > > An: freeswitch-users at lists.freeswitch.org
> > > Betreff: Re: [Freeswitch-users] Inband DTMF Problem
> >
> > > Extract the RTP audio into wav/au files in wireshark and lets look at
> > > them.
> > >
> > > /b
> > >
> > > On Nov 5, 2008, at 2:30 PM, Klaus Teller 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.
> > >
> > >
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> > >
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> 
> 
> 
> -- 
> Anthony Minessale II
> 
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