asterisk users - Nov 2004 - Fax server (TxFax) fails during transmission

I'm having an intermittent problem with fax transmissions, something I 
call the streaking mascara syndrome.

TxFax will be part way through a transmission when something fails--on 
the fax printer, part of the page will have correctly printed, but the 
rest of the page is "streaked" to the bottom.

I have several successful multi-page transmissions interspersed with 
streaked transmissions, so I believe it is a timing problem, not a 
software problem.  The fax machines are an HP5500 and an industrial 
strength Konica(?).

During one successful transmission, I tar'd a large directory without 
incident.  This leads me to believe it's not processor or disk usage 
causing the problem.

I'm not running X, and I've switched off all unnecessary services.  I do
have asterisk and qmail running on the same box.  Asterisk is only doing 
the TxFax function and does not have any voice calls as yet.  I've 
renice'd qmail to +10 without effect.

Does anyone have a method to trace this problem?  Is there some way to 
monitor the PCI bus and interrupts?  Any suggestions would be appreciated.

Thanks,

-- 
Michael Welter
Introspect Telephony Corp.
Denver, Colorado US
+1.303.674.2575
mike@introspect.com
www.introspect.com

I forgot to give the particulars:

Fedora Core 2
asterisk-1.0.2
spandsp-0.0.2pre6

GigaByte Triton GA7N400-Pro2 MB with AMD Athlon 2800+ CPU, 512Mb.

Cheers,

-- 
Michael Welter
Introspect Telephony Corp.
Denver, Colorado US
+1.303.674.2575
mike@introspect.com
www.introspect.com