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Kingston Technology Company KNS3250/R User’s Guide - Rev. A00
38 Appendix B - Cabling Guidelines
UTP 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 W UTP
CAT 5 type cables use 4-pair UTP wiring.
Refer to the illustrations below for 4-pair 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 congurations, but for
premise wiring, stick to one wiring standard. Mixing T568A and T568B wiring
schemes may cause or lead to potential problems.
Fig. B-1 4-Pair T568A Wiring Fig. B-2 4-Pair T568B Wiring
Table B-4 4-Pair T568A Wiring Table B-5 4-Pair T568B Wiring
Pin 1
Pin 2
Pin 3
Pin 4
Pin 5
Pin 6
Pin 7
Pin 8
Pair 3
Pair 3
Pair 2
Pair 1
Pair 1
Pair 2
Pair 4
Pair 4
Blue
Orange
Black
Red
Green
Yellow
Brown
White
White/Green
Green/White
White/Orange
Blue/White
White/Blue
Orange/White
White/Brown
Brown/White
T568A Pairs Strand Solid
Pin 1
Pin 2
Pin 3
Pin 4
Pin 5
Pin 6
Pin 7
Pin 8
Pair 2
Pair 2
Pair 3
Pair 1
Pair 1
Pair 3
Pair 4
Pair 4
Black
Yellow
Blue
Red
Green
Orange
Brown
White
White/Orange
Orange/White
White/Green
Blue/White
White/Blue
Green/White
White/Brown
Brown/White
T568B Pairs Strand Solid