Re: 2838 10/100 Ethernet adapter full duplex mode

On Mon, Oct 07, 2002 at 02:16:51PM -0400, Pat Barber wrote:
> The "only" ethernet connects I have personally seen, use common
> flat 2 wire RJ45 type connections. Even though the wire has four
> strands, I believe only two are used. I have "never" made up a
> ethernet cable but cat5 is really just another wiring system. I
> have used cat5 extensively with twinax terminals and printers.
> Only two strands of wire are used.

For 10BaseT and 100BaseT connections using Cat5 wiring and RJ45 connectors,
the pinout is:

Pin  Description  EIA T568A wire color EIA T568B wire color
 1    TX +        green-white          orange-white
 2    TX -        green                orange
 3    RX +        orange-white         green-white
 6    RX -        orange               green

All other pins are unused.

Note that, as long as the cable is constructed to the same standard at both
ends, it doesn't matter which standard is used, and cables constructed to
either standard may be used interchangeably. Also, a crossover cable is made
by making one end up as T568A and the other as T568B.