[Gllug] Ethernet crossover wiring

[John Winters]

On Fri, 2006-02-24 at 23:47 +0000, Chris Bell wrote:
> On Fri 24 Feb, John Winters wrote:
> > 
> 
> > 
> > Once you recognise that a genuinely "straight-through" road is one where
> > the left hand side of the road as seen from town A is the same side as
> > the right hand side seen from town B, then everything works neatly.
> > Both towns can use the same convention and you need only one kind of
> > road.
> >         Left=>
> >         -------------------------------------------------------
> >       A                                                         B
> >         -------------------------------------------------------
> >                                                          <=Left
> > 
> > I'll stop ranting now - honest.
> > 
> > John
> > 
> 
>    There is also the problem of extending cables, easy with 1-1, difficult
> with almost anything else

No, extending cables works just as easily with my proposed system as it
does with the current broken one.

>  (although I have seen connectors which have one
> side male and the other side female).

Gender of connectors is orthogonal to the way they're wired.  Current
female-female widgets (used for joining two RJ45 patch cables) are wired
1-1, 2-2, 3-3 etc.  In the "just one kind of cable" world they'd have to
be wired 1-8, 2-7, 3-6 etc. like the cables, but it would all just work
and only one kind of everything required.

John

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