[asterisk-r2] Sending DTMF 'f' ?

Amilcar Silvestre amilcar at vonix.com.br
Wed Mar 18 19:56:16 CDT 2009 

Moises,

I understand what you are saying, but i'm pretty sure that the DTMF  
has came from DAHDI. Like i said, the problem has been solved  
completely disabling hardware dtmf detector on wanpipe, and now I  
don`t have any log entries that show "f" dtmf entries.

I can't re-enable the hardware dtmf detector right now to reproduce  
the error now because the box is in production. Tomorrow I will try to  
re-enable it and will capture the log entries, as you requested.

Anyway, thanks for the help.

Amilcar.


On Mar 18, 2009, at 8:44 PM, Moises Silva wrote:

> As I said before, the Sangoma or Digium drivers cannot magically pass
> the DTMF to the Asterisk core, it has to first be requested and read
> by the chan_dahdi.c Asterisk driver, if you want to really find the
> culprit you need to provide the log I asked for.
>
> Moy
>
> On Wed, Mar 18, 2009 at 4:06 PM, Amilcar Silvestre <amilcar at vonix.com.br 
> > wrote:
>> Moises,
>>
>> 27 minutes working with no problems at all. No more "DTMF "f"  
>> received
>> on DAHDI" at all. The problem is on wanpipe hardware dtmf detection.
>>
>> But this is very strange since, as i said, i use TDMV_HW_DTMF enabled
>> on many, many clients without any problems.
>>
>> Since now you're working for Sangoma, do you have any clues why is
>> this happening? ;-) I'm using wanpipe 3.3.16 (hmm, the other boxes  
>> are
>> running 3.3.14, maybe the new version introduced some bug to the
>> hardware dtmf detector?)
>>
>> Regards,
>> Amilcar.
>>
>>
>> On Mar 18, 2009, at 5:39 PM, Amilcar Silvestre wrote:
>>
>>> Moises,
>>>
>>> No actions from manager here.
>>>
>>> I'm suspecting that this comes from the hardware DTMF detection in  
>>> the
>>> echo cancelation module in the board (Sangoma A104D), altough i've
>>> never seem this happened, and I have at lest 60 others boxes with R2
>>> and hardware dtmf detection using sangoma. Works like a charm. I've
>>> turned it off. Let us see if the problem persists.
>>>
>>> Regards,
>>> Amilcar.
>>>
>>> On Mar 18, 2009, at 5:33 PM, Moises Silva wrote:
>>>
>>>> No is not enough to see DAHDI/3-1, because that message is  
>>>> printed by
>>>> the core, but the core may have dequeued this DTMF digit from other
>>>> source than a read() in chan_dahdi.c, as I said, it may have come
>>>> from
>>>> the manager (which is capable of enqueueing DTMF in any channel),  
>>>> and
>>>> there is other ways to fake incoming DTMF.
>>>>
>>>> Moy
>>>>
>>>> On Wed, Mar 18, 2009 at 5:29 PM, Amilcar Silvestre <amilcar at vonix.com.br
>>>>> wrote:
>>>>> The "DTMF Down " message will only be seem if i turn DEBUG level  
>>>>> to
>>>>> the logs. DMTF only is not sufficient. Doing it now.
>>>>>
>>>>> Amilcar.
>>>>>
>>>>> On Mar 18, 2009, at 5:23 PM, Amilcar Silvestre wrote:
>>>>>
>>>>>> Moises,
>>>>>>
>>>>>> DTMF begin 'f'received on DAHDI/3-1 doesn't mean that the DTMF is
>>>>>> coming from DAHDI??
>>>>>>
>>>>>> No DTMF Down anywhere in the logs.
>>>>>>
>>>>>> Amilcar.
>>>>>>
>>>>>> On Mar 18, 2009, at 5:15 PM, Moises Silva wrote:
>>>>>>
>>>>>>> I still fail to see the log where this DTMF comes from
>>>>>>> chan_dahdi.c
>>>>>>>
>>>>>>> Did you just miss it?
>>>>>>>
>>>>>>> Can you check your log and see if you can find a message like:
>>>>>>>
>>>>>>> DTMF Down 'f'
>>>>>>>
>>>>>>> in chan_dahdi?? otherwise somehow that DTMF is received from
>>>>>>> somewhere
>>>>>>> else, perhaps a manager application or something like that?
>>>>>>>
>>>>>>> On Wed, Mar 18, 2009 at 4:51 PM, Amilcar Silvestre <amilcar at vonix.com.br
>>>>>>>> wrote:
>>>>>>>> Moises,
>>>>>>>>
>>>>>>>> The log from console, with dtmf debug enabled is:
>>>>>>>>
>>>>>>>> [Mar 18 17:49:59] DTMF[3411]: channel.c:2279 __ast_read: DTMF
>>>>>>>> begin
>>>>>>>> 'f' received on DAHDI/3-1
>>>>>>>> [Mar 18 17:49:59] DTMF[3411]: channel.c:2289 __ast_read: DTMF
>>>>>>>> begin
>>>>>>>> passthrough 'f' on DAHDI/3-1
>>>>>>>> [Mar 18 17:49:59] WARNING[3411]: rtp.c:2205
>>>>>>>> ast_rtp_senddigit_begin:
>>>>>>>> Don't know how to represent 'f'
>>>>>>>>
>>>>>>>> Amilcar.
>>>>>>>>
>>>>>>>> On Mar 18, 2009, at 4:47 PM, Amilcar Silvestre wrote:
>>>>>>>>
>>>>>>>>> Hi Moyses,
>>>>>>>>>
>>>>>>>>> Ok, I've enabled DTMF debugging, and here's what i've got:
>>>>>>>>>
>>>>>>>>> [Mar 18 17:34:12] NOTICE[2690] chan_dahdi.c: MFC/R2 call has
>>>>>>>>> been
>>>>>>>>> accepted on chan 10
>>>>>>>>> [Mar 18 17:34:12] NOTICE[2690] chan_dahdi.c: Call accepted on
>>>>>>>>> forward
>>>>>>>>> channel 10
>>>>>>>>> (...)
>>>>>>>>> [Mar 18 17:39:51] DTMF[2705] channel.c: DTMF begin 'f'  
>>>>>>>>> received
>>>>>>>>> on
>>>>>>>>> DAHDI/10-1
>>>>>>>>> [Mar 18 17:39:51] DTMF[2705] channel.c: DTMF begin passthrough
>>>>>>>>> 'f'
>>>>>>>>> on
>>>>>>>>> DAHDI/10-1
>>>>>>>>> [Mar 18 17:39:51] WARNING[2705] rtp.c: Don't know how to
>>>>>>>>> represent
>>>>>>>>> 'f'
>>>>>>>>> (...)
>>>>>>>>> [Mar 18 17:40:17] DTMF[2705] channel.c: DTMF begin 'f'  
>>>>>>>>> received
>>>>>>>>> on
>>>>>>>>> DAHDI/10-1
>>>>>>>>> [Mar 18 17:40:17] DTMF[2705] channel.c: DTMF begin passthrough
>>>>>>>>> 'f'
>>>>>>>>> on
>>>>>>>>> DAHDI/10-1
>>>>>>>>> [Mar 18 17:40:17] WARNING[2705] rtp.c: Don't know how to
>>>>>>>>> represent
>>>>>>>>> 'f'
>>>>>>>>> (...)
>>>>>>>>> [Mar 18 17:40:24] DTMF[2705] channel.c: DTMF begin 'f'  
>>>>>>>>> received
>>>>>>>>> on
>>>>>>>>> DAHDI/10-1
>>>>>>>>> [Mar 18 17:40:24] DTMF[2705] channel.c: DTMF begin passthrough
>>>>>>>>> 'f'
>>>>>>>>> on
>>>>>>>>> DAHDI/10-1
>>>>>>>>> [Mar 18 17:40:24] WARNING[2705] rtp.c: Don't know how to
>>>>>>>>> represent
>>>>>>>>> 'f'
>>>>>>>>> (...)
>>>>>>>>> [Mar 18 17:40:44] DTMF[2705] channel.c: DTMF begin 'f'  
>>>>>>>>> received
>>>>>>>>> on
>>>>>>>>> DAHDI/10-1
>>>>>>>>> [Mar 18 17:40:44] DTMF[2705] channel.c: DTMF begin passthrough
>>>>>>>>> 'f'
>>>>>>>>> on
>>>>>>>>> DAHDI/10-1
>>>>>>>>> [Mar 18 17:40:44] WARNING[2705] rtp.c: Don't know how to
>>>>>>>>> represent
>>>>>>>>> 'f'
>>>>>>>>> [Mar 18 17:40:45] DTMF[2793] channel.c: DTMF begin 'f'  
>>>>>>>>> received
>>>>>>>>> on
>>>>>>>>> DAHDI/12-1
>>>>>>>>> [Mar 18 17:40:45] DTMF[2793] channel.c: DTMF begin passthrough
>>>>>>>>> 'f'
>>>>>>>>> on
>>>>>>>>> DAHDI/12-1
>>>>>>>>> [Mar 18 17:40:45] WARNING[2793] rtp.c: Don't know how to
>>>>>>>>> represent
>>>>>>>>> 'f'
>>>>>>>>> (...)
>>>>>>>>> [Mar 18 17:43:05] NOTICE[2705] chan_dahdi.c: Chan 10 - Far end
>>>>>>>>> disconnected. Reason: Forced Release
>>>>>>>>> [Mar 18 17:43:05] NOTICE[2705] chan_dahdi.c: MFC/R2 call
>>>>>>>>> disconnected
>>>>>>>>> on chan 10
>>>>>>>>> [Mar 18 17:43:05] NOTICE[4775] chan_dahdi.c: MFC/R2 call end  
>>>>>>>>> on
>>>>>>>>> chan
>>>>>>>>> 10
>>>>>>>>>
>>>>>>>>> And this is happening in two different telcos.
>>>>>>>>>
>>>>>>>>> Yes, I've patched asterisk. The patch is that from googlecode
>>>>>>>>> for
>>>>>>>>> 1.4.23, with a very tiny modification to make the channel
>>>>>>>>> returns
>>>>>>>>> the
>>>>>>>>> hangupcause.
>>>>>>>>>
>>>>>>>>> Amilcar.
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> On Mar 18, 2009, at 4:32 PM, Moises Silva wrote:
>>>>>>>>>
>>>>>>>>>> Hum, I see what you mean. But, MFC and DTMF use different  
>>>>>>>>>> pair
>>>>>>>>>> of
>>>>>>>>>> frequencies and F does not even exist in DTMF. Please enable
>>>>>>>>>> dtmf
>>>>>>>>>> debugging in your logger.conf and try to reproduce, I'd  
>>>>>>>>>> expect
>>>>>>>>>> to
>>>>>>>>>> see
>>>>>>>>>> clearly if chan_dahdi/chan_zap is the one detecting a MF  
>>>>>>>>>> digit
>>>>>>>>>> and
>>>>>>>>>> wrongly sending it down to the core as DTMF digit.
>>>>>>>>>>
>>>>>>>>>> Did you patched that asterisk yourself?
>>>>>>>>>>
>>>>>>>>>> From a quick look at the code, the 'f' frame subclass is also
>>>>>>>>>> used
>>>>>>>>>> for
>>>>>>>>>> FAX, so that f does not necessarily refers to the MF F tone.
>>>>>>>>>>
>>>>>>>>>> Moy
>>>>>>>>>>
>>>>>>>>>> On Wed, Mar 18, 2009 at 4:20 PM, Amilcar Silvestre <amilcar at vonix.com.br
>>>>>>>>>>> wrote:
>>>>>>>>>>> Hi Moises,
>>>>>>>>>>>
>>>>>>>>>>> I've already recorded the call using mixmonitor on the sip
>>>>>>>>>>> side.
>>>>>>>>>>> The
>>>>>>>>>>> same on the recorded file. Mixmonitor only records the sip
>>>>>>>>>>> side,
>>>>>>>>>>> and
>>>>>>>>>>> the far end is muted.
>>>>>>>>>>>
>>>>>>>>>>> And the problem only occurs on the R2 links. PRI works ok
>>>>>>>>>>> (same
>>>>>>>>>>> box).
>>>>>>>>>>>
>>>>>>>>>>> Seems that, after it enters on the function
>>>>>>>>>>> ast_rtp_senddigit_begin
>>>>>>>>>>> in
>>>>>>>>>>> rtp.c, the function returns 0 (it doesn't have the "f" digit
>>>>>>>>>>> for
>>>>>>>>>>> DTMF,
>>>>>>>>>>> the digit 'f' is related to MFC). After it returns 0, the
>>>>>>>>>>> audio
>>>>>>>>>>> from
>>>>>>>>>>> DAHDI stops been redirected to the sip end point.
>>>>>>>>>>>
>>>>>>>>>>> Amilcar.
>>>>>>>>>>>
>>>>>>>>>>> On Mar 18, 2009, at 4:08 PM, Moises Silva wrote:
>>>>>>>>>>>
>>>>>>>>>>>> I think you should try to post this in asterisk-users, this
>>>>>>>>>>>> is
>>>>>>>>>>>> not
>>>>>>>>>>>> an R2 issue.
>>>>>>>>>>>>
>>>>>>>>>>>> Having said that, it would be a good idea to reproduce, and
>>>>>>>>>>>> then,
>>>>>>>>>>>> when
>>>>>>>>>>>> you have a call like that, use dahdi_monitor or ztmonitor  
>>>>>>>>>>>> to
>>>>>>>>>>>> verify
>>>>>>>>>>>> the audio is getting into the board correctly, then you can
>>>>>>>>>>>> monitor
>>>>>>>>>>>> the RTP traffic on the SIP side of the call and see if
>>>>>>>>>>>> Asterisk
>>>>>>>>>>>> is
>>>>>>>>>>>> still sending the audio correctly, if it does, then the
>>>>>>>>>>>> problem
>>>>>>>>>>>> is
>>>>>>>>>>>> definitely not even in Asterisk.
>>>>>>>>>>>>
>>>>>>>>>>>> On Wed, Mar 18, 2009 at 3:54 PM, Amilcar Silvestre <amilcar at vonix.com.br
>>>>>>>>>>>>> wrote:
>>>>>>>>>>>>> Douglas,
>>>>>>>>>>>>> If you meant the CAS bits, is 1101.
>>>>>>>>>>>>> If you mean the configuration of the link:
>>>>>>>>>>>>> signalling=mfcr2
>>>>>>>>>>>>> mfcr2_variant=br
>>>>>>>>>>>>> mfcr2_get_ani_first=no
>>>>>>>>>>>>> mfcr2_max_ani=10
>>>>>>>>>>>>> mfcr2_max_dnis=4
>>>>>>>>>>>>> mfcr2_category=national_subscriber
>>>>>>>>>>>>> mfcr2_logdir=span1
>>>>>>>>>>>>> mfcr2_logging=all
>>>>>>>>>>>>> mfcr2_metering_pulse_timeout=500
>>>>>>>>>>>>> Regards,
>>>>>>>>>>>>> Amilcar.
>>>>>>>>>>>>>
>>>>>>>>>>>>> On Mar 18, 2009, at 3:50 PM, Douglas Fischer wrote:
>>>>>>>>>>>>>
>>>>>>>>>>>>> What do you have in your start bits? (zapata.conf)
>>>>>>>>>>>>>
>>>>>>>>>>>>> 2009/3/18 Amilcar Silvestre <amilcar at vonix.com.br>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Hi,
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> I have a box using asterisk 1.4.23.2, and OpenR2 1.1.0.  
>>>>>>>>>>>>>> The
>>>>>>>>>>>>>> board
>>>>>>>>>>>>>> is a
>>>>>>>>>>>>>> Sangoma A104D, From times to times, it shows this  
>>>>>>>>>>>>>> message:
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> WARNING[31548] rtp.c: Don't know how to represent 'f'
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Seems to be something related to sending a DTMF digit.
>>>>>>>>>>>>>> After
>>>>>>>>>>>>>> this
>>>>>>>>>>>>>> message, the caller (an internal SIP endpoint) doens't  
>>>>>>>>>>>>>> hear
>>>>>>>>>>>>>> anything
>>>>>>>>>>>>>> more from the called (far end, coming from a R2 link),  
>>>>>>>>>>>>>> but
>>>>>>>>>>>>>> the
>>>>>>>>>>>>>> far
>>>>>>>>>>>>>> end
>>>>>>>>>>>>>> keeps receiving the audio from the SIP end point.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> The message comes with no intervention from the user on  
>>>>>>>>>>>>>> SIP
>>>>>>>>>>>>>> end
>>>>>>>>>>>>>> point.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Does anyone knows what is happening?
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Thanks,
>>>>>>>>>>>>>> Amilcar.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> _______________________________________________
>>>>>>>>>>>>>> --Bandwidth and Colocation Provided by http://www.api-
>>>>>>>>>>>>>> digital.com--
>>>>>>>>>>>>>>
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>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>> --
>>>>>>>>>>>>> Douglas Fernando Fischer
>>>>>>>>>>>>> Engº de Controle e Automação
>>>>>>>>>>>>> _______________________________________________
>>>>>>>>>>>>> --Bandwidth and Colocation Provided by http://www.api-
>>>>>>>>>>>>> digital.com--
>>>>>>>>>>>>>
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>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> --
>>>>>>>>>>>> "I do not agree with what you have to say, but I’ll  
>>>>>>>>>>>> defend to
>>>>>>>>>>>> the
>>>>>>>>>>>> death your right to say it." Voltaire
>>>>>>>>>>>>
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>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> --
>>>>>>>>>> "I do not agree with what you have to say, but I’ll defend to
>>>>>>>>>> the
>>>>>>>>>> death your right to say it." Voltaire
>>>>>>>>>>
>>>>>>>>>> _______________________________________________
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>>>>>>>>>> digital.com--
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>>>>>>>>>
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>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> --
>>>>>>> "I do not agree with what you have to say, but I’ll defend to  
>>>>>>> the
>>>>>>> death your right to say it." Voltaire
>>>>>>>
>>>>>>> _______________________________________________
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>>>>>
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>>>>
>>>>
>>>> --
>>>> "I do not agree with what you have to say, but I’ll defend to the
>>>> death your right to say it." Voltaire
>>>>
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>
>
> -- 
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> death your right to say it." Voltaire
>
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