corrupt faxes

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Hi,

Henning R. Eggers wrote:
> I have a problem with mgetty (0.99.3) and g3topbm. All faxes
> are received correctly but when some of them are converted,
> g3topbm generates many 'invalid code' error messages. The
> '-r' option does not help either. 

Well, up to maybe 10 lines or so are "perfectly ok". Some modems
have problems with top-of-page synchronization, and thus the first
few lines can indeed be corrupt.

How many messages do you call "many"?

> As an example I have put a G3 file, as produced by mgetty and
> what g3topbm (with ppmtogif) does to it onto our web server.
> Most faxes come out o.k., though. The occurance of the error
> seems to depend on the remote mashine that sends the fax. 

Might depend on the maximum speed - 9600 and 14400 usually use
different carrier types, and different timing, so that might make
a difference.

> I am using a USR Courier and Linux (kernel 2.0.30) if that is of
> any relevance. 

The Courier usually yields quite satisfactory results. Please make sure
that you use the very latest firmware version -- earlier models have had
bad bugs in the fax part.

gert
-- 
Gert Doering
Mobile communications ... right now writing from *AWAY* :-)) 
... mobile phone: +49 177 2160221 ... or mail me: gert@greenie.muc.de
.