The modem training is not even close to correct. It looks like the FAX software is not seeing good audio from the FAX machine. However, it might be a strange problem in my modem software. The way to investigate something like this is to look in spandsp-0.0.1/src/t30.c The first line is normally commented out. Remove the // so LOG_FAX_AUDIO is defined, rebuild and reinstall spandsp, restart * and try the fax again. You should find two files in your /tmp directory called fax-rx-audio-xxx and fax-tx-audio-xxx, where xxx is the date and time. These contain the audio streams in and out of the FAX software. Send them to me, and I will analyse (and hopefully fix) what is happening.
Regards, Steve
Rob Fugina wrote:
I just built the latest * from CVS, spandsp 1i, and hacked app_rxfax for the 'lock' parameters (I used 0 in all cases). The result of my first fax transmission attempt is the following, which I post in case it helps the developers any... The only thing I changed is the phone number (TSI), which was correct, btw...
Of course, if it's obvious to someone that I did something wrong, please let me know...
Thanx, Rob
-- Executing RxFAX("Zap/25-1", "/tmp/fax.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
DIS:CSI: 40 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20
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
HDLC underflow in state 9DIS: 80 00 ce f0 80 80 01
Changed from phase 4 to 3
Slow carrier up
<<< TSI: 43 34 38 36 34 20 34 39 39 20 34 31 33 20 20 20 20 20 20 20 20
TSI without final frame tag
Remote fax gave TSI as: "XXX XXX XXXX"
<<< DCS: 83 00 c6 f0 80 80 00
DCS with final frame tag
In state 9
DCS:
Can receive fax
Selected data signalling rate: V.29, 9600bps
R8x7.7lines/mm and/or 200x200pels/25.4mm OK
2D coding OK
Scan line length: 215mm
Recording length: A4 (297mm)
Minimum scan line time: 0ms
Minimum scan line time for higher resolutions: T15.4 = T7.7
Get at 9600
Changed from phase 3 to 5
Fast carrier up
Fast carrier down
Trainability test failed - longest run of zeros was 0
Fast carrier upFTT: 44
Coarse carrier frequency 1674.67 (6)
Training error 698.983520
Training failed (convergence failed)
Fast carrier training failed
Fast carrier down
Trainability test failed - longest run of zeros was 0
Fast carrier upFTT: 44
Training failed (sequence failed)
Fast carrier training failed
Fast carrier down
Trainability test failed - longest run of zeros was 0
Fast carrier upFTT: 44
Coarse carrier frequency 1695.52 (6)
Training error 664.526567
Training failed (convergence failed)
Fast carrier training failed
Fast carrier down
Trainability test failed - longest run of zeros was 0
Fast carrier upFTT: 44
Training failed (sequence failed)
Fast carrier training failed
Fast carrier down
Trainability test failed - longest run of zeros was 0
Fast carrier upFTT: 44
Coarse carrier frequency 1566.39 (4)
Training error 753.088253
Training failed (convergence failed)
Fast carrier training failed
Fast carrier down
Trainability test failed - longest run of zeros was 0
Fast carrier upFTT: 44
Training failed (sequence failed)
Fast carrier training failed
Fast carrier down
Trainability test failed - longest run of zeros was 0
Fast carrier upFTT: 44
Fast carrier down
Trainability test failed - longest run of zeros was 0
-- Hungup 'Zap/25-1'FTT: 44
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