Re: [NTLK] Ethernet Crossover Cables

From: Daniel Smith (djoannidi_at_mac.com)
Date: Mon Sep 24 2001 - 14:25:12 EDT

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Keep in mind, if you're the proud owner of an Apple PowerBook G4 (with the
slick Ti shell and megawide 15" screen) you will never need a crossover
cable.

This nifty portable Supercomputer has a fancy Ethernet port that
automagically detects and switches the connections. Hub to PowerBook? No
problem. Powerbook to G3 Desktop? Patch Cable? No problem!

<http://developer.apple.com/techpubs/hardware/Developer_Notes/Macintosh_CPUs
-G4/PowerBook_G4/PBG4-51.html>
This wasn't really advertised, but a brief examination of the Developer Docs
will prove this true. That, and my meticulous experiments to prove this
right with several systems when they were first released.

Just an FYI. It's really neat and I wish this was in the newer iBooks too.

--
Daniel Joannidi Smith
Student Developer
(512) 619-5459
djoannidI_at_mac.com
----- Original Message -----
From: "Douglas Taylor" <finnanhaddie_at_sympatico.ca>
To: <newtontalk_at_newtontalk.net>
Sent: Tuesday, September 18, 2001 7:38 AM
Subject: [NTLK] Ethernet Crossover Cables (was: Newton MessagePad 2100)
>
>
> Here's a site with a diagram if you are inclined to "roll your own."  All
> you need is a regular 10BT cable, wire snippers and electrical tape.  I've
> made several crossovers with the "twist 'n' tape" method, and they have
> given me years of service.
>
> http://www.ots.utexas.edu/ethernet/10quickref/ch5qr_5.html
>
> cheers,
> Doug
>
>
> <michael_at_michael-hussmann.de> wrote:
>
> > Subject: Re: [NTLK] Newton MessagePad 2100
> > Date: Tue, 18 Sep 2001 13:13:35 +0200
> >
> > Manfred Mortera (mmortera_at_netpci.com) wrote:
> >
> >> You mention a "crossover" cable. Does that mean there is no HUB? I've
always
> >> thought that Ethernet was a star topology rather than a bus.
> >
> > Ethernet as such doesn't specify a particular topology, but 10Base-T,
> > 100Base-T (fast ethernet) and gigabit ethernet require a star topology
> > (i.e. you generally need a hub). However, for connecting two devices, be
> > it two desktop computers, a PC/Mac and a Newton, a computer and a
printer
> > etc., a crossover cable works (nearly) as well. With two gigabit
ethernet
> > computers, even a normal patch cable suffices, as this interface can
tell
> > whether it's connected to a hub or another computer.
> >
> > - Michael
>
>
>
> --
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