[Freeswitch-users] Inband DTMF Problem

Wed Nov 5 19:34:46 PST 2008

yes that's the same as my sleep explanation.

On Wed, Nov 5, 2008 at 9:11 PM, Johny Kadarisman <jkr888 at gmail.com> wrote:

> Not sure if this is related or something totally different, I used to have
> dtmf detection problem with inband setup. One side sending digits with
> send_dtmf, and on the other side, detecting the digits. Both run freeswitch
> with custom script, and the call go over pstn carrier network. The receiving
> side always having problem on detecting these dtmf, But then it solved if I
> played some kind of audio file after "send_dtmf" command. So, I did
> something like these:
>
> <action application="send_dtmf" data="12345#"/>
> <action application="playback" data="sounds/500ms.wav"/>
>
> Weirds, but at least solved my problem ;)
>
>
>
>
>
>
>
>
>
> On Wed, Nov 5, 2008 at 4:46 PM, Anthony Minessale <
> anthony.minessale at gmail.com> wrote:
>
>> you are one email behind i think.
>> Problem is that FS only sends 2833 while it's busy doing something so you
>> have to keep FS reading audio to trigger the outbound dtmf.
>>
>>
>>
>> On Wed, Nov 5, 2008 at 3:37 PM, Klaus Teller <klaus.teller at gmx.net>wrote:
>>
>>> 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.
>>> > > >
>>> > > >
>>> > > > _______________________________________________
>>> > > > Freeswitch-users mailing list
>>> > > > Freeswitch-users at lists.freeswitch.org
>>> > > > http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
>>> > > >
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>>> > >
>>> > > --
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>>> > allen:
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>>> > >
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>>> > >
>>> >
>>> >
>>> >
>>> > --
>>> > Anthony Minessale II
>>> >
>>> > FreeSWITCH http://www.freeswitch.org/
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>>> >
>>> > AIM: anthm
>>> > MSN:anthony_minessale at hotmail.com<MSN%3Aanthony_minessale at hotmail.com><
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>>> >
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>>> >
>>> > IRC: irc.freenode.net #freeswitch
>>> >
>>> > FreeSWITCH Developer Conference
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>>> >
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>>> >
>>> > pstn:213-799-1400
>>>
>>> --
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>>>
>>
>>
>>
>> --
>> Anthony Minessale II
>>
>> FreeSWITCH http://www.freeswitch.org/
>> ClueCon http://www.cluecon.com/
>>
>> AIM: anthm
>> MSN:anthony_minessale at hotmail.com <MSN%3Aanthony_minessale at hotmail.com>
>> GTALK/JABBER/PAYPAL:anthony.minessale at gmail.com<PAYPAL%3Aanthony.minessale at gmail.com>
>>  IRC: irc.freenode.net #freeswitch
>>
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>> iax:guest at conference.freeswitch.org/888
>> googletalk:conf+888 at conference.freeswitch.org<googletalk%3Aconf%2B888 at conference.freeswitch.org>
>> pstn:213-799-1400
>>
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>>
>
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>

-- 
Anthony Minessale II

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