Re: [hylafax-users] Barcoding of pages occurs with different modems

["Ben Ragg" <benr@chariot.net.au>]

The barcode effect is vertical and extends the whole way across an entire A4
page. Unfortunately I'm only at work 2 days a week around study, but with a
quick cut and paste job, I've uploaded
something that looks very similar to what we're getting. The address is http://www.chariot.net.au/~benr/barcode.gif


This is not due to line noise - the pattern is repeatable over and over from
the same modem. Change the modem and the pattern will vary slightly, but the
same effect (e.g. the Redback's lines are a lot thinner than the Dlink and the
Tassie Devil, but still in the same places. Usually with the character e, the
bar will span the full length of the e on the 56k modems but only on the two
edges on the Redback)

The cover page will work fine everytime, and one other postscript file seems
to work fine every time. There is nothing unusual about the other postscript
file - its not smallest nor the largest, its average. It was produced from MS-Word
on the same computer with the same printer driver as the others, at the same
time. The same effect also happens when we use TIFF files.

We have tiff-3.5.5 installed on FreeBSD 3.4.

Hopefully this helps!

Regards,
Ben

>On Wed, Apr 25, 2001 at 09:42:12AM -0600, Lee Howard wrote:
>> At 10:13 AM 4/25/01 -0400, Jay R. Ashworth wrote:
>> >Alternatively (if it's on send), perhaps you and Lee could coordinate to

>> >fax a couple to his development machine, and he could mail or post
>> >them.
>> 
>> I'm cool with this.  Only I have to know in advance, because I have to plug

>> a line into it here (and decide which development version I want to have

>> receive the fax).
>
>Suspected maybe.
>
>> I tend to believe that this "barcoding" is really just corrupted lines in

>> the fax.  Do these barcode lines run horizontally?  If so, then that's
>> probably it, and you are probably dealing with bad lines or static or some

>> other interference.  If they run vertically, then if this is a sending
>> problem it could be an issue with libtiff "streaking" the image (you can

>> look at the images in the docq to tell).  If HylaFAX or the modems really

>> are to blame, then for some reason it sounds like the same line keeps
>> getting sent over and over and over.
>
>Concur, but it sounds from his posting like the barcode pattern is
>*repeatable* by modem type, which isn't *just* line noise.
>
>Cheers,
>-- jra
>-- 
>Jay R. Ashworth                                                jra@baylink.com

>Member of the Technical Staff     Baylink
>The Suncoast Freenet         The Things I Think
>Tampa Bay, Florida        http://baylink.pitas.com             +1 727 804 5015

>
>
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