Cable Wiring Standards - Kingston Technology KNE12TX/RS User Manual

Appendix B Cabling Guidelines

Cable Wiring Standards

There are two governmental agencies: the Electronic Industry Association
(EIA) and the Telecommunications Industry Association (TIA), which set the
standard for all cable wiring requirements for commercial buildings.
With the advent of 100Mb/s networking products, it is best to use higher
quality CAT 5 cables like Belden or Helix as well as CAT 5-compliant patch
panels, patch cables, and connectors while following the EIA/TIA wiring
standards. 100 Ω UTP CAT 5 type cables use 4-pair UTP wiring.
Refer to the illustrations below for 4-pair 100Mb/s wiring using either T568A
(Fig. B-1) or T568B (Fig. B-2) wiring standards. Both T568A and T568B
wiring is compatible with 10BASE-T and 100BASE-TX and require no special
configurations, but stick to one wiring standard. If your building is wired for
T568A, any changes or additions must be done with the T568A wiring scheme.
Mixing the T568A and T568B wiring schemes will not work.
Pair 2
Pair 3 Pair 1 Pair 4
1 2 3 4 5 6 7 8
T568A
Fig. B-1. 4-Pair T568A Wiring
T568A Pairs Strand
Pin 1 Pair 3 Blue
Pin 2 Pair 3 Orange
Pin 3 Pair 2 Black
Pin 4 Pair 1 Red
Pin 5 Pair 1 Green
Pin 6 Pair 2 Yellow
Pin 7 Pair 4 Brown
Pin 8 Pair 4 White
Table. B-4. 4-Pair T568A Wiring
KNE24TX/RS User's Guide - Rev. A01
Pair 2 Pair 1 Pair 4
1 2 3 4 5 6 7 8
Fig. B-2. 4-Pair T568B Wiring
Solid T568B Pairs
White/Green Pin 1 Pair 2
Green/White Pin 2 Pair 2
White/Orange Pin 3 Pair 3
Blue/White Pin 4 Pair 1
White/Blue Pin 5 Pair 1
Orange/White Pin 6 Pair 3
White/Brown Pin 7 Pair 4
Brown/White Pin 8 Pair 4
Table B-5. 4-Pair T568B Wiring
Kingston Technology Company
15
Pair 3
T568B
Strand Solid
Black White/Orange
Yellow Orange/White
Blue White/Green
Red Blue/White
Green White/Blue
Orange Green/White
Brown White/Brown
White Brown/White