[Asterisk-Users] spandsp and certain (e.g. Canon) fax machines

Thu Aug 26 03:24:51 MST 2004

Hi,

If that is what you are running, you should be getting audio log files. 
The have names like /tmp/fax-rx-audio-<date> and 
/tmp/fax-tx-audio-<date>. I need a matching pair and the console log for 
investigation.

Regards,
Steve

reseaux wrote:

>Dear Steve
>	the first line of t30.c is
>-------------
>#define LOG_FAX_AUDIO
>/*
> * SpanDSP - a series of DSP components for telephony
> *
> * t30.c - ITU T.30 FAX transfer processing
> *
> * Written by Steve Underwood <steveu at coppice.org>
> *
> * Copyright (C) 2003 Steve Underwood
> *
>----------
>I think is right uncomment but i dont see ant audio log under /tmp, do you 
>think is possible no audio log?
>Thanks in advance
>Dimitri
>
>
>On Thursday 26 August 2004 06:15, Steve Underwood wrote:
>  
>
>>Hi,
>>
>>You are trying to receive from a Canon FAX machine. The problem I hope
>>the change will fix is in sending *to* a Canon FAX machine. The user who
>>found the bug in spandsp was trying to send to a Philips FAX machine.
>>During negotiation the Philips sent a disconnect message, which is the
>>same problem some people have with some Canon machines.
>>
>>It is not clear from your log why you have problems training the V.29
>>modem. Can you enable logging, by uncommenting the first line in t30.c,
>>and send me the audio log files you will get in your /tmp directory.
>>
>>Regards,
>>Steve
>>
>>reseaux wrote:
>>    
>>
>>>Dear Steve
>>>       i have try the SpanDSP (ver.k and latest Asterisk cvs) with the
>>>mod you have
>>>write below, but nothing my Canon Fax still dont send the fax:
>>>-----
>>>   -- Executing RxFAX("Zap/35-1", "/home/user/testfax.tif") in new stack
>>>Changed from phase 0 to 1
>>>Slow carrier up
>>>Slow carrier down
>>>Slow carrier up
>>>Slow carrier down
>>>Start receiving document
>>>Changed from phase 1 to 4
>>>Sending ident
>>>
>>>      
>>>
>>>>>>CSI: 40 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20
>>>>>>            
>>>>>>
>>>DIS:
>>>Preferred octets: 256
>>>Can receive fax
>>>Supported data signalling rates: V.27ter and V.29
>>>R8x7.7lines/mm and/or 200x200pels/25.4mm OK
>>>2D coding OK
>>>Scan line length: 215mm
>>>Recording length: A4 (297mm)
>>>Receiver's minimum scan line time: 0ms at 3.85 l/mm: T7.7 = T3.85
>>>R8x15.4lines/mm OK
>>>Minimum scan line time for higher resolutions: T15.4 = T7.7
>>>
>>>      
>>>
>>>>>>DIS: 80 00 ce f0 80 80 01
>>>>>>            
>>>>>>
>>>HDLC underflow in state 9
>>>Changed from phase 4 to 3
>>>Slow carrier up
>>><<< TSI: 43 37 30 38 30 35 33 31 33 33 30 20 20 20 20 20 20 20 20 20 20
>>>TSI without final frame tag
>>>Remote fax gave TSI as: "0331350807"
>>><<< DCS: 83 00 86 a0 00
>>>DCS with final frame tag
>>>In state 9
>>>DCS:
>>>Can receive fax
>>>Selected data signalling rate: V.29, 9600bps
>>>2D coding OK
>>>Scan line length: 215mm
>>>Recording length: A4 (297mm)
>>>Minimum scan line time: 10ms
>>>Get at 9600
>>>Changed from phase 3 to 5
>>>Fast carrier up
>>>Coarse carrier frequency 1728.81 (11)
>>>Fast carrier down
>>>Fast carrier up
>>>Coarse carrier frequency 1699.38 (86)
>>>Fast carrier training failed
>>>Fast carrier down
>>>Fast carrier up
>>>Coarse carrier frequency 1700.06 (4917)
>>>Fast carrier down
>>>Fast carrier up
>>>Coarse carrier frequency 1699.33 (86)
>>>Fast carrier training failed
>>>Fast carrier down
>>>Fast carrier up
>>>Coarse carrier 1700.09 (4915)
>>>Fast carrier down
>>>Fast carrier up
>>>Coarse carrier frequency 1699.33 (86)
>>>Fast carrier training failed
>>>Fast carrier down
>>>Fast carrier up
>>>Coarse carrier frequency 1700.07 (2924)
>>>Fast carrier down
>>>   -- Executing NoOp("Zap/35-1", "DIALEDTIME=") in new stack
>>>   -- Executing NoOp("Zap/35-1", "ANSWEREDTIME=") in new stack
>>>   -- Executing Hangup("Zap/35-1", "") in new stack
>>>----
>>>
>>>I dont know how to debug more, you can give more help to trace the
>>>problem? Thanks in advance.
>>>Dimitri
>>>
>>>On Wednesday 25 August 2004 11:34, Steve Underwood wrote:
>>>      
>>>
>>>>Hi,
>>>>
>>>>Several people have reported problems sending faxes from spandsp-0.0.1k
>>>>to Canon FAX machines. A spandsp user had the same problem with another
>>>>make of FAX machine, and traced the problem to a bug in the file t30.c
>>>>of spandsp. Line 542 says s->t4.rx_file[0] where it should say
>>>>s->t4.tx_file[0]. This fixes his problem, and I suspect it will also fix
>>>>the Canon fax machine problem. Can someone having problems with Canon
>>>>machines try this change, and tell me the result?
>>>>
>>>>Regards,
>>>>Steve
>>>>
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