Technical Documentation

RJ45 Wiring

There are two standards been used today the TIA/EIA-568-A and the TIA/EIA-568-A. The TIA/EIA-568-B standard were first published in 2001 and it supersede the TIA/EIA-568-A standards set, which are now obsolete but still in use.

Straight cable

A straight cable, also called patch cable, (used to connect computers to hubs/switch) are easy to make. It requires two (2) RJ45 connectors cabled with the same colors in both ends as shown here:

T-568A

T-568B

Legend:

g	Green with stripes
G	Green solid
o	Orange with stripes
B	Blue solid
b	Blue with stripes
O	Orange solid
b	Brown with stripes
B	Brown solid

Cross cable

10BaseT

A cross cable for a 10BaseT (10 Mbps) network has a RJ45 connector cabled as shown above and another one cabled as shown below (clip down):

Pins 4, 5, 7 and 8 are not crossed.

On the other hand, a cross cable for a 100BaseT (100 Mbps) network has its second RJ45 connector cabled as shown below (clip down):

Typical RJ45 cable

by George Lopez-Henriquez / www.inetnj.com