Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!csd4.milw.wisc.edu!lll-winken!uunet!summus!craigp
From: craigp@summus.UUCP (craigp)
Newsgroups: comp.unix.xenix
Subject: Re: 386 Xenix 2.3.1/vpix/Compaq 20 Problem.  Help!
Summary: check your cable lengths
Keywords: hang vpix xenix computone
Message-ID: <173@summus.UUCP>
Date: 7 Apr 89 15:19:37 GMT
References: <226@ecicrl.UUCP>
Lines: 28

In article <226@ecicrl.UUCP>, clewis@ecicrl.UUCP (Chris Lewis) writes:
> One of our clients is having a severe system problem and maybe someone
> out there can help.  SCO/Computone sure can't.

> Problem: 
> 
> The severe problem is a complete system freezeup, ranging from 
> once or twice a week to 5 or 6 times a day.  The disk is apparently

> The one thing that does seem to be common is that
> someone's on one of the Computone ports (mind you it's hard to get two
> people on without at least using one!)
> 

We have a client which was having similar problems.  I believe he
had an AST multi-port card.  The entire system would lock up
(atleast serial i/o would, though I believe that the system was
in fact still running) at times.  

It only happened when someone was using an AST port.  The cables
between the terminals and PC's were quite long, so we shortened them
and the problem hasn't recurred since.

If your terminals are some distance from the PC, trying moving them
closer. (I don't know what the distance limitations on serial cables
are but I believe its less than 75 feet).

Good Luck!