Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!wuarchive!udel!rochester!pt.cs.cmu.edu!o.gp.cs.cmu.edu!andrew.cmu.edu!ls1i+
From: ls1i+@andrew.cmu.edu (Leonard John Schultz)
Newsgroups: comp.sys.next
Subject: Re: Twisted pair Ethernet, Mounting mounted volumes
Message-ID: <Yc4Wm5u00WBLA2Ka98@andrew.cmu.edu>
Date: 22 Apr 91 00:21:25 GMT
References: <1991Apr21.035323.26965@macc.wisc.edu> <481@heaven.woodside.ca.us> <1991Apr21.132909.18543@macc.wisc.edu>,
	<1991Apr21.223849.21607@utstat.uucp>
Organization: Class of '92, Carnegie Mellon, Pittsburgh, PA
Lines: 34
In-Reply-To: <1991Apr21.223849.21607@utstat.uucp>

On 21-Apr-91 in Re: Twisted pair Ethernet, ..
user Philip McDunnough@utstat writes:
>>>The NeXT '040 boards come with twisted pair transceivers built in.
> 
>>Talk about having one's brain in standby!  My office NeXT is
>>plugged right into the T-10 net.  What was I thinking?  (Nothing.
>>apparently.)  I even wrote that guy a long letter this morning,
>>still blissfully unaware of being a dunce.  Shoulda had that nap
>>yesterday, I guess.
> 
......
> 
>Assuming I get a NuBus Mac Ethernet board with a "phone jack" in it, can
>I just plug the "phone wire" into the mac and into the NeXT. Software is
>another issue which I'll raise at a later date.
> 
>I take it there is this issue of a transceiver, which sounds like something
>to match impedance. Would this be inside the NuBus card in the Mac, or
>would it look like an Appletalk connector at 5times the price? Or, would
>I need a "hub" which sounds expensive.
> 
>Could someone just explain this in very simple terms please. I seem to be
>getting conflicting answers( anywhere from it's impossible to use thin wire).

I am trying to do a similar thing, namely connect two NeXTstations with
one phone cord.  Apparantly a hub is needed to allow a network of
computers to send and recieve on a twisted-pair wire.  From my
understanding, the reason why you cannot just connect the two machines
with a phone wire is that the hub crosses the wires in the twisted pair.
 This leads to the conclusion that you can cross the wires in a phone
cord and make a two machine 10baseT network.  I have not tried this yet.
 Does anyone know if such a scheme would work?

Len