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From: hgw@julia.math.ucla.edu (Harold Wong)
Newsgroups: comp.sys.mac
Subject: Re: MODUNet WARNING
Message-ID: <1656@sunset.MATH.UCLA.EDU>
Date: 31 Aug 89 18:35:17 GMT
References: <1647@sunset.MATH.UCLA.EDU> <25260@iuvax.cs.indiana.edu>
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Reply-To: hgw@math.ucla.edu (Harold Wong)
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Organization: UCLA Mathematics Department
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In article <25260@iuvax.cs.indiana.edu> gilbertd@silver.bacs.indiana.edu (Don Gilbert) writes:
>In article <1647@sunset.MATH.UCLA.EDU> hgw@MATH.UCLA.EDU (Harold Wong) writes:
>>This is a warning to all of you using MODUNet appletalk modules from
>>DataSpec.  They do not work.  If you are having problems with one machine
>>not being able  to talk to another or not being able to choose a printer,
>>then check for these connectors.  Even if only one of these connectors are on
>>your network, it will affect other Macs. 
>
>I have used about 20 of these with no problems at all.  Could you be more
>specific about "they do not work"?  What is your network like? Were they
>installed properly?
>
>-- Don           gilbertd@silver.bacs.indiana.edu 
> 


I'm using them like any normal localnet installation.  Let me describe two
situations.

One time I had seven Macs hooked up along three consecutive tables.  The phone
cord between the Macs were 6 ft.  Two of the Macs had appletalk so I placed
them at the end.  When everything was hooked up, I had difficulty getting
falcon and net trek to work.  Sometimes each of the Macs could see the other
and at other times, they couldn't. Yes, I tried taking the terminator out
but that didn't help.

In the second situation, I have many Macs scattered throughtut two floors
of our building.  Once hooked up, I had the same problem.  This time the problem
was easier to detect since all I had to do was to use the chooser to look for
our laserprinter.  Again, some of the Macs at different times could find the
printer and at other times couldn't.  Traffic watch found lots of CRC errors.

I finally decided to take a chance and replaced all the modunets with phone net.
The network has been flawless since.  I was careful not to disturb any of the
existing wiring.  This time, I tried a little experiment.  I replaced one of the
phone net with a modunet and the problem showed up again.

-------------------------------------------------------------------------------

Harold Wong         (213) 825-9040 
UCLA-Mathnet; 3915F MSA; 405 Hilgard Ave.; Los Angeles, CA 90024-1555
ARPA: hgw@math.ucla.edu          BITNET: hgw%math.ucla.edu@INTERBIT