flexfax: Fax Quality Not Consistent

[cn.liu@ptc.com.tw (CN Liu)]

>I need your help to improve the fax quality.
>
>The server: Hylafax 4.0p11 under Linux 2.0.32 with gcc 2.7.22 and ZyXEL
>U-1496E. gs3.33,fonts-3.33,jpeg-5a are used.
>
>The client software is Whfc 0.5 running in Windows 95 Traditional Chinese
>version (4.00.950). The client printer driver is HP 4/4M Postscript.
>

Hello! Everyone,

I appreciate very much for all your suggestions!

I have made further testings according to your suggestions. The results are
as follows:

1. Upgrading ghostscript from 3.33 to 5.10 does not change the fax quality.
2. Apple Laser Writer prints Eudora email in excellent quality. HP 4/4M
postscript and AST Turbo Laser-PS deliver the same poor fax quality. (Eudora
does not allow me to change the font size).
3. Excel spreadsheet (12 points)is best printed by HP 4/4M postscript but
Chinese characters(12 points) are still expected to be improved - they are
vague (not heavy enough). Apple and QMS PMS-810 print Chinese characters
even lighter than HP. However, the borders, numbers are well faxed by the 3
printer drivers.
4. Both HP and AST fax Word document (12 points) in good quality while Apple
fails to print (see below error email). (Notice that Apple can print Eudora
and Excel. Why?)
5. Chinese characters copied from Word (12 points) and pasted to Excel (12
points) are faxed in good quality from Excel. (Why?)
6. Apple and HP printed in the same quality for web pages from IE3.02.
7. An Excel example spreadsheet that is packaged by MS can not be faxed by
HP or Apple. (I saw fax machine was handshaking with hylafax. The fax
machine then said "receiving" and "completed", but nothing came out. Hylafax
dialed 3 times and then gave up.)
8. Chinese characters of 24 points size in Excel are faxed in excellent
quality by HP.

Any further suggestions will be much appreciated!

Happy new year!

CN Liu
===========(Result 4. :Apple and Word problem follows)========================
Your facsimile job to 0,7400987 was not sent because document conversion
to facsimile failed.  The output from the converter program was:

%%[ Error: undefined; OffendingCommand: pop? ]%%
Aladdin Ghostscript: Unrecoverable error, exit code 1
/bin/cat: write error: Broken pipe


Check any PostScript documents for non-standard fonts and invalid constructs.