The pbmtog3 program from the pbmplus distribution produces G3
data that does not adhere to the T.4 standard. The initial EOL code is
missing, and the lines are not always 1728 pixels wide. So, some fax
machines won’t accept the output at all (not printing even one line), and
others will complain.
A fix for this problem is available: I have included a patch for pbmtog3,
called patches/pbmtog3.p1, that will fix the problems. (Oh, by the
way, if you try to send a fax generated with an unpatched pbmtog3, sendfax
will complain that it doesn’t like the file … I’ve added a small
sanity check to spare me the time browsing through the logfiles guessing
why sendfax failed (won’t work if the file has been processed by
g3cat, though!)). If you use the pbm2g3 program that is
shipped with mgetty, there is no need to patch anything.
Basically, there is no need at all to use pbmplus’ pbmtog3
program any more, since mgetty includes an own copy. I just wanted
to warn you.
Anyway, my program is lots faster ….