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

[reseaux]

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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