Description

This article is from the Data Communications Cabling FAQ, by Peter Macaulay pmac@fox.nstn.ca with numerous contributions by others.

9.0 Standard EIA/TIA 568 (Data Communications Cabling)

The ANSI/EIA/TIA-568-1991 Standard "Commercial Building
Telecommunications Wiring Standard" defines pinouts;

9.1 Standard EIA/TIA T568A
(also called ISDN, previously called EIA)

        Pin  Wire Color
        ===  ==========
         /--T3  1   White/Green
   Pair3 \--R3  2   Green
        /----------T2  3   White/Orange
       /         /-R1  4   Blue
 pair2 \   pair1 \-T1  5   White/Blue
        \----------R2  6   Orange
         /--T4  7   White/Brown
   pair4 \--R4  8   Brown

9.2 Standard EIA/TIA T568B
(also called AT&T specification, previously called 258A)

         /--T2  1   White/Orange
   pair2 \--R2  2   Orange
        /----------T3  3   White/Green
       /         /-R1  4   Blue
 pair3 \   pair1 \-T1  5   White/Blue
        \----------R3  6   Green
         /--T4  7   White/Brown
   pair4 \--R4  8   Brown

9.3 USOC (Universal Service Order Code)

   8-pins    6-pins
         |  |
     /-------------T4  1     White/Brown
    /    /---------T3  2  1  White/Green
   /    /    /-----T2  3  2  White/Orange
  /    /    /    /-R1  4  3  Blue
      pr4\ pr3\ pr2\ pr1\-T1  5  4  White/Blue
   \    \    \-----R2  6  5  Orange
    \    \---------R3  7  6  Green
     \-------------R4  8     Brown

 

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• prev: 8.0 Cabling Standards (Data Communications Cabling)
• Index
• next: 10.0 Birds and Bees (Plugs vs. Jacks) (Data Communications Cabling)

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networking, cabling, data communications, standards, implementations, 10Base-T, Classification, cable rating, fiber optic cable