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From: amichiel@rodan.acs.syr.edu (Allen J Michielsen)
Newsgroups: comp.sys.mac.hardware
Subject: Re: Two unrelated questions (sideways monitors & appletalk cables)
Keywords: monitor appletalk cables
Message-ID: <1991Jan15.163828.26383@rodan.acs.syr.edu>
Date: 15 Jan 91 16:38:28 GMT
References: <24966@dime.cs.umass.edu> <1991Jan12.213455.7162@svc.portal.com> <1991Jan15.150236.20871@rodan.acs.syr.edu>
Sender: amichiel@sunrise.acs.syr.edu
Organization: Syracuse University, Syracuse, NY
Lines: 33

In article <1991Jan15.150236.20871@rodan.acs.syr.edu> isr@rodan.acs.syr.edu
>In article <1991Jan12.213455.7162@svc.portal.com> daven@svc.portal.com writes:
>>In article <24966@dime.cs.umass.edu> leban@cs.umass.edu (Bruce Leban) writes:
>>>   (it is o.k. to) hook a single Mac up to a single AppleTalk device
>>>   with an ImageWriter cable, with the implication (this is a) two node 
>>>    AppleTalk network.  Is this correct? 
>>Hmmm. Sounds a bit fishy to me. 
>actually, this will work, but what you do is connect the Mac's
>printer port to the Laserwriter appletalk port, just as you do with
>applealk boxes in place.

   Apple did onces recommend this (highly).  The problem can be, when the mac
and printer are on isolated ac supplies, damage to 1 or both ports can occur.
(This is about as likely as a snow in hell, except when at research/university
sites).  Then apple dropped this recommendataion, but many dealer still 
recommend it, sell it, support it, and we use it quite a bit.  (When using
a outlet strip with either a surge surpressor or fuse/breaker, or a individual
surge protector, be sure to have the printer and computer BOTH on the same line
it's possible that a fault or poor/cheap design could duplicate the problem.)
(p.s. I have yet to have 1 break, but....).
   When in the chooser, you will still be telling it that you are using apple
talk.  At this (chooser) level, you are telling it what software protocool to
use, NOT what hardware you have.  Of course what mike says is true, any line
conversion from rs232 voltage levels is done by whatever (distance extender)
boxes you generally use (farallon-phonenet or apple-localtalk or ...).
al



-- 
Al. Michielsen, Mechanical & Aerospace Engineering, Syracuse University
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