Re: [hylafax-users] Fax Corruption Problem

[Lee Howard <faxguy@xxxxxxxxxxxxxxxx>]

Tassilo Erlewein wrote:
> The resulting faxes at the destination look like shrinked together
> vertically that is, several horizontal stripes of about 1cm are missing.
> Hylafax reports the faxes as being sended ok though. 
>
>
> Jul 01 10:59:42.16: [12806]: <-- [9:AT+FTS=9\r]
> Jul 01 10:59:42.24: [12806]: --> [2:OK]
> Jul 01 10:59:42.24: [12806]: SEND send EOM (more documents)

I would initially guess that you're having trouble with flow control.  
Without ECM being used (the receiver doesn't support it) the receiver 
will confirm pages as received that will contain image problems.  The 
most-likely cause of the problems you're reporting is that when 
buffering data to the modem that there is a bug somewhere in the modem 
or in the USB hardware or drivers which caused the data to get lost.

You've reported that you've resolved the problem by switching to Class 
2.  And while I'm glad you've resolved the problem you'll not want to 
stay at Class 2 because you don't support ECM at all there.

I would suggest upgrading to HylaFAX+ 5.4.2 in order to eliminate all 
suspicion that this may be a HylaFAX bug, and then switch back to Class 
1 by re-running faxsetup and faxaddmodem.  If the problem persists 
there, then work with the ModemFlowControl and ModemRate modem config 
options.  See:

http://hylafax.sourceforge.net/man/hylafax-config.php

Thanks,

Lee.


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