Re: [hylafax-users] Problems debugging serial ports (internal and SIIG)

["andrew rinaldi" <andrew.rinaldi@xxxxxxxxxxxx>]

Hi Mark.

If you can answer the following questions it may help explain what's
happening;

Are all the modems truly identical (same firmware, chipset version, build
version, etc.) ?

Are all the modems using identical serial cables ?

Are all the serial ports set to the same comm parameters (baud rate,
handshake type, etc.) ?

Does the SIIG card use the same serial driver as the motherboard or a custom
driver ?

Are any of the serial interrupts shared ?

Have you swapped the telco lines between ttyS1 and ttyS2 ?

Regards

ANDREW RINALDI
Mainpine Support
USA +1 718 701 2422 | Asia/Europe +44 1225 436137 
andrew.rinaldi@xxxxxxxxxxxx | www.mainpine.com

-----Original Message-----
From: hylafax-users-bounce@xxxxxxxxxxx
[mailto:hylafax-users-bounce@xxxxxxxxxxx] On Behalf Of Mark Gillingham
Sent: 03 January 2006 22:59
To: hylafax-users@xxxxxxxxxxx
Subject: [hylafax-users] Problems debugging serial ports (internal and SIIG)

Our setup has three identical Courier V-everything modems. We have been
using just one of them for reception for 2 years with little problem. This
one is on ttyS1, a motherboard serial port. Recently, we needed to add a
second reception line (and we've reduced sending) so I configured an
identical modem with the same configuration as ttyS1, but this modem is on a
PCI serial card (by SIIG), which we've used successfully for sending. Now
the setup is like this:

ttyS1 <- receive-motherboard
ttyS2 <- receive-PCI
ttyS3 -> send-PCI

When testing ttyS2 by using the sending modem on ttyS3, I get good reception
results. Most other receptions fail in various ways (I've swapped the modems
on ttyS2 and ttyS3). I've kept a list. It dawned on me that the main
difference between ttyS1 and ttyS2 is the serial port. It may be that
sending from ttyS3 to ttyS2 works because it is from-to the same PCI serial
card. If that is the case, I need to do some testing, but I don't know where
to begin. Can I test with Hylafax tools? Am I way off base? 

Mark


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