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Pirlouwi

2007-Sep-05 13:53 UTC

[asterisk-users] rxfax() problem - fax signal seems to be ignored

Hello,
my configuration is the following:
a TDM400P board with an fxs and fxo daughter boards on it.

I thus connect a fax to my FXS port, after having verified that this port
was correctly functioning. For this, I had tried before with a simple phone,
and with some basic voicemail exten scripts.

Here is my simple dialplan for my fax reception:
exten => 300,1,Ringing()
exten => 300,n,Answer()
exten => 300,n,Set(FAXFILE=/tmp/test.tif)
exten => 300,n,rxfax(${FAXFILE}||debug)

I then dialed 300 on my fax machine, and expected to be lucky and to obtain
a /tmp/test.tif file after faxing completion.
But instead, I always got such error in the /var/log/asterisk/full log file:

[Sep  5 13:42:21] DEBUG[1272] chan_zap.c: Monitor doohicky got event
Ring/Answered on channel 1
[Sep  5 13:42:21] VERBOSE[1298] logger.c:     -- Starting simple switch on
'Zap/1-1'
[Sep  5 13:42:22] DEBUG[1298] chan_zap.c: DTMF digit: 3 on Zap/1-1
[Sep  5 13:42:23] DEBUG[1298] chan_zap.c: DTMF digit: 0 on Zap/1-1
[Sep  5 13:42:24] DEBUG[1298] chan_zap.c: DTMF digit: 0 on Zap/1-1
[Sep  5 13:42:24] DEBUG[1298] devicestate.c: Notification of state change to
be queued on device/channel Zap/1-1
[Sep  5 13:42:24] DEBUG[1298] chan_zap.c: Enabled echo cancellation on
channel 1
[Sep  5 13:42:24] DEBUG[1298] pbx.c: Launching 'Ringing'
[Sep  5 13:42:24] VERBOSE[1298] logger.c:     -- Executing [300 at Internal:1]
Ringing("Zap/1-1", "") in new stack
[Sep  5 13:42:24] DEBUG[1298] chan_zap.c: Requested indication 3 on channel
Zap/1-1
[Sep  5 13:42:24] DEBUG[1298] devicestate.c: Notification of state change to
be queued on device/channel Zap/1-1
[Sep  5 13:42:24] DEBUG[1298] pbx.c: Launching 'Answer'
[Sep  5 13:42:24] VERBOSE[1298] logger.c:     -- Executing [300 at Internal:2]
Answer("Zap/1-1", "") in new stack
[Sep  5 13:42:24] DEBUG[1298] devicestate.c: Notification of state change to
be queued on device/channel Zap/1-1
[Sep  5 13:42:24] DEBUG[1298] chan_zap.c: Took Zap/1-1 off hook
[Sep  5 13:42:24] DEBUG[1298] pbx.c: Launching 'Set'
[Sep  5 13:42:24] VERBOSE[1298] logger.c:     -- Executing [300 at Internal:3]
Set("Zap/1-1", "FAXFILE=/tmp/test.tif") in new stack
[Sep  5 13:42:24] DEBUG[1298] pbx.c: Launching 'RxFAX'
[Sep  5 13:42:24] VERBOSE[1298] logger.c:     -- Executing [ 300 at Internal:4]
RxFAX("Zap/1-1", "/tmp/test.tif||debug") in new stack
[Sep  5 13:42:24] DEBUG[1298] channel.c: Set channel Zap/1-1 to read format
slin
[Sep  5 13:42:24] DEBUG[1298] channel.c: Set channel Zap/1-1 to write format
slin
[Sep  5 13:42:24] DEBUG[1270] devicestate.c: No provider found, checking
channel drivers for Zap - 1
[Sep  5 13:42:24] DEBUG[1270] devicestate.c: Changing state for Zap/1 -
state 2 (In use)
[Sep  5 13:42:24] DEBUG[1270] devicestate.c: No provider found, checking
channel drivers for Zap - 1
[Sep  5 13:42:24] DEBUG[1270] devicestate.c: Changing state for Zap/1 -
state 2 (In use)
[Sep  5 13:42:24] DEBUG[1270] devicestate.c: No provider found, checking
channel drivers for Zap - 1
[Sep  5 13:42:24] DEBUG[1270] devicestate.c: Changing state for Zap/1 -
state 2 (In use)
[Sep  5 13:42:24] DEBUG[1299] app_queue.c: Device 'Zap/1' changed to
state
'2' (In use) but we don't care because they're not a member of
any queue.
[Sep  5 13:42:24] DEBUG[1300] app_queue.c: Device 'Zap/1' changed to
state
'2' (In use) but we don't care because they're not a member of
any queue.
[Sep  5 13:42:24] DEBUG[1301] app_queue.c: Device 'Zap/1' changed to
state
'2' (In use) but we don't care because they're not a member of
any queue.
[Sep  5 13:43:09] DEBUG[1298] chan_zap.c: Exception on 8, channel 1
[Sep  5 13:43:09] DEBUG[1298] chan_zap.c: Got event On hook(1) on channel 1
(index 0)
[Sep  5 13:43:09] DEBUG[1298] chan_zap.c: disabled echo cancellation on
channel 1
[Sep  5 13:43:09] DEBUG[1298] app_rxfax.c: Got hangup
[Sep  5 13:43:09] DEBUG[1298] channel.c: Set channel Zap/1-1 to read format
ulaw
[Sep  5 13:43:09] DEBUG[1298] channel.c: Set channel Zap/1-1 to write format
ulaw
[Sep  5 13:43:09] DEBUG[1298] app_rxfax.c:
=================================================[Sep  5 13:43:09] DEBUG[1298]
app_rxfax.c: Fax receive not successful -
result (51) The call dropped prematurely.
[Sep  5 13:43:09] DEBUG[1298] app_rxfax.c:
=================================================[Sep  5 13:43:09] DEBUG[1298]
app_rxfax.c: FLOW FAX Set rx type 13
[Sep  5 13:43:09] DEBUG[1298] app_rxfax.c: FLOW FAX FAX exchange complete
[Sep  5 13:43:09] DEBUG[1298] app_rxfax.c: FLOW FAX Set tx type 13
[Sep  5 13:43:09] DEBUG[1298] app_rxfax.c: FLOW FAX FAX exchange complete
[Sep  5 13:43:09] DEBUG[1298] pbx.c: Extension 300, priority 4 returned
normally even though call was hung up
[Sep  5 13:43:09] DEBUG[1298] channel.c: Soft-Hanging up channel
'Zap/1-1'
[Sep  5 13:43:09] DEBUG[1298] channel.c : Hanging up channel 'Zap/1-1'
[Sep  5 13:43:09] DEBUG[1298] chan_zap.c: zt_hangup(Zap/1-1)
[Sep  5 13:43:09] DEBUG[1298] chan_zap.c: Hangup: channel: 1 index = 0,
normal = 8, callwait = -1, thirdcall = -1
[Sep  5 13:43:09] DEBUG[1298] chan_zap.c: disabled echo cancellation on
channel 1
[Sep  5 13:43:09] DEBUG[1298] chan_zap.c: Set option TDD MODE, value: OFF(0)
on Zap/1-1
[Sep  5 13:43:09] DEBUG[1298] chan_zap.c: Updated conferencing on 1, with 0
conference users
[Sep  5 13:43:09] VERBOSE[1298] logger.c:     -- Hungup 'Zap/1-1'
[Sep  5 13:43:09] DEBUG[1298] devicestate.c: Notification of state change to
be queued on device/channel Zap/1-1
[Sep  5 13:43:09] DEBUG[1270] devicestate.c: No provider found, checking
channel drivers for Zap - 1
[Sep  5 13:43:09] DEBUG[1270] devicestate.c: Changing state for Zap/1 -
state 0 (Unknown)
[Sep  5 13:43:09] DEBUG[1303] app_queue.c: Device 'Zap/1' changed to
state
'0' (Unknown) but we don't care because they're not a member of
any queue.
[Sep  5 13:43:10] DEBUG[1272] chan_zap.c: Monitor doohicky got event Hook
Transition Complete on channel 1

I have enabled the #define LOG_FAX_AUDIO inside spandsp library, and two
audio files (fax-rx-audio-b7933500-070905134224 and
fax-tx-audio-b7933500-070905134224) appeared in /tmp.

I used Cool96 (an old Win98 free program) to import this audio data (8KHz
mono 16bit PCM-Intel), and it appears that there is currently no fax
synchronisation nor negotiation at all.
All I see in Cool96 is that the fax send its CNG (a 1100Hz tone during
0.5severy 3 seconds), and that Asterisk application app_rxfax() answer
with an
exactly identical tone.
I am not very specialist of T.30 protocol, but I thought that in this case
SPANDSP would have answered with a CED tone (a 2100Hz tone during 2.5s),
like explained here (http://www.eicon.com/support/helpweb/dssdk/i200.htm)

This is not the case in my setup. What did I wrong?
Thx for your help.
--Pirlouwi
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Andrew Joakimsen

2007-Sep-05 21:21 UTC

head link

[asterisk-users] rxfax() problem - fax signal seems to be ignored

On 9/5/07, Pirlouwi <pirlouwi at gmail.com> wrote:> Hello,
> my configuration is the following:
> a TDM400P board with an fxs and fxo daughter boards on it.
>
> I thus connect a fax to my FXS port, after having verified that this port
> was correctly functioning. For this, I had tried before with a simple
phone,
> and with some basic voicemail exten scripts.
>
> Here is my simple dialplan for my fax reception:
> exten => 300,1,Ringing()
> exten => 300,n,Answer()
>  exten => 300,n,Set(FAXFILE=/tmp/test.tif)
>  exten => 300,n,rxfax(${FAXFILE}||debug)
Why? exten => 300,1,rxfax(/tmp/test.tif||debug) would do the same
exact thing. No need to indicate ringing and no need to "answer" the
call. Besides that it is just incorrect you are never going to have
correct answer supervision on an analog line, so don't even try.

> I then dialed 300 on my fax machine, and expected to be lucky and to obtain
> a /tmp/test.tif file after faxing completion.
> But instead, I always got such error in the /var/log/asterisk/full log
file:
What if you just use a regular analog phone and dial 300? What
happens? What if you remove the ||Debug from your RxFax dialstring?
>  [Sep  5 13:42:24] DEBUG[1298] pbx.c: Launching 'Ringing'
> [Sep  5 13:42:24] DEBUG[1298] chan_zap.c: Took Zap/1-1 off hook
> [Sep  5 13:42:24] DEBUG[1298] pbx.c: Launching 'Set'
>  [Sep  5 13:42:24] VERBOSE[1298] logger.c:     -- Executing [300 at
Internal:3]
> Set("Zap/1-1", "FAXFILE=/tmp/test.tif") in new stack
>  [Sep  5 13:42:24] DEBUG[1298] pbx.c: Launching 'RxFAX'
Notice how your own logs prove that 0ms elapse between the time you
incorrectly indicate ringing on the channel and the time RxFax begins.
>
> I have enabled the #define LOG_FAX_AUDIO inside spandsp library, and two
> audio files (fax-rx-audio-b7933500-070905134224 and
> fax-tx-audio-b7933500-070905134224) appeared in /tmp.
Just listen into the line. When you execute RxFax it will play fax
tones just as if another faxmachine answered -- not CNG tones
> This is not the case in my setup. What did I wrong?
> Thx for your help.

What version of Linux, Asterisk, Zaptel, SpanDSP & app_rxfax are you using?

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