In uk.d-i-y, Mindwipe wrote:

try this link
http://www.tlc-direct/technical/netw...networking.htm

basically you wire pin to pin on all connections
HTH Jeff,Leeds

But it's *important* to use pairs between the right pins, or the
crosstalk/interference-rejection performance goes right out of the
window. You need a Proper Pair for each of the two sets of outer
pins (1,2 and 7,8), a Proper Pair for the innermost pair of pins
(4,5), and the last Proper Pair for the remaining pins (3,6).
No, it's not intuitive. Reasons are buried in the mists of old-style
telecom practice on 4-pin RJ11's (equivalent to the inner 4) and
badness of separating pairs too far to carry on the "next outermost
pair" pattern when you get to bigget RJ45 plugs. (No BellSystem
pedants about Proper Names for RJ11/RJ45, please!).

Once you accept - as you really must - this need for keeping the
pairs in order, you may as well go the whole hog and stick to exactly
one of the two accepted schemes: from memory, it's blue pair for 1/2,
brown pair for 7/8, and then a matter of religion (-A or -B) as to
whether your green pair goes 4/5 and the orange 3/6, or t'other way
round. *Functionally*, provided you pair consistently, the colours
you use, and which way round you do solid vs stripe, doesn't matter
at all: electrons are colour-blind. But failing to stick to exactly
one of the two standard wiring schemes is pretty well guaranteed to
bite a future maintainer - including yourself in a few months' time
- *hard* on the bum.

Stefek