TN104 - UTP Wiring

104.1    Standard EIA/TIA T568A

                                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

104.2    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

104.3    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

104.4    Pin Numbering

        The EIA/TIA specifies an RJ-45 (ISO 8877) connector for Unshielded
        Twisted Pair (UTP) cable.

            Plug                          Jack
            (Looking at connector          (Looking at cavity
             end with the cable             in the wall)
             running away from you)

                ---------- /                   ----------
               | 87654321 |                   | 12345678 |
               |__      __|/                  |/_      /_|
                  |____|                         |/___|

104.5    Cable Pinouts

        With reference to T568B above:
          ATM 155Mbps uses pairs 2 and 4 (pins 1-2, 7-8)
          Ethernet 10Base-T uses pairs 2 and 3 (pins 1-2, 3-6)
          Ethernet 100Base-T4 uses pairs 2 and 3 (4T+) (pins 1-2, 3-6)
          Ethernet 100Base-T8 uses pairs 1,2,3 and 4 (pins 4-5, 1-2, 3-6, 7-8)
          Token-Ring uses pairs 1 and 3 (pins 4-5, 3-6)
          TP-PMD uses pairs 2 and 4 (pins 1-2, 7-8)
          100VG-AnyLAN uses pairs 1,2,3 and 4 (pins 4-5, 1-2, 3-6, 7-8)

        Ethernet 10Base-T Straight Thru patch cord (T568B colors);

           RJ45 Plug        RJ45 Plug
              =========        =========
                     /--T2  1  ... White/Orange .... 1  TxData +
               pair2 \--R2  2  ... Orange .......... 2  TxData -
             /----------T3  3  ... White/Green ..... 3  RecvData +
            /           R1  4      Blue              4
            \  pair3    T1  5      White/Blue        5
             \----------R3  6  ... Green ........... 6  RecvData -
                        T4  7      White/Brown       7
                        R4  8      Brown             8

        Ethernet 10Base-T Crossover patch cord;

        RJ45 Plug  1 Tx+ -------------- Rx+ 3  RJ45 Plug
                   2 Tx- -------------- Rx- 6
                   3 Rx+ -------------- Tx+ 1
                   6 Rx- -------------- Tx- 2

        Ethernet 10Base-T to USOC Crossover patch cord;

        RJ45 8-pin Plug  1 ---White/Orange--- 2  USOC 6-pin Plug
                         2 ------Orange------ 5
                         3 ---White/Green---- 1
                         6 ------Green------- 6

        Stranded Patch Cables
        The color code used in stranded patch cables is different from
        solid-conductor cables. For NorTel Digital Patch Cable (DPC),
        the coding is;
                Pair 1: Green & Red
                Pair 2: Yellow & Black
                Pair 3: Blue & Orange
                Pair 4: Brown & Gray

104.6    Category Specifications

        EIA/TIA Category Specification provide for the following cable
        transmission speeds with specifications:

        Category 1 = No performance criteria
        Category 2 = Rated to 1 MHz (used for telephone wiring)
        Category 3 = Rated to 16 MHz (used for Ethernet 10Base-T)
        Category 4 = Rated to 20 MHz (used for Token-Ring, 10Base-T)
        Category 5 = Rated to 100 MHz (used for 100Base-T, 10Base-T)

104.7    Cables Making Tools

        It is imperative to use a quality connector, tool, and cable
        Further, the connectors and tool must be designed for each other
        do not mix one brand of connector with another brand of tool.

        Recommended tool:

        AMP Terminating tool for modular plugs:  pn 231652
        Complete set of tool, dies, and case: pn 1-231666-4

        Dies for various size plugs:

        AMP PN      color   description
        ----------  ------  --------------------------------------
        1-853400-0  white   8 position CAT5 (RJ-45)
        853400-1    black   8 position line (RJ-45)
        853400-8    blue    6 position (RJ-11)
        853400-3    green   4 position (handset)


        Plugs:

        AMP PN      conductor  cable       conductor  type
        ----------  --------   ----------  ---------  -------
        5-641334-2     4       flat oval   stranded   handset
        5-641335-2     4       flat oval   stranded   line (RJ-11)
        5-641337-2     6       flat oval   stranded   line (RJ-11)
        5-554739-2     8       flat oval   stranded   line (RJ-45)
        5-558530-2     8       round       stranded   CAT5 certified
        5-569278-2     8       round       solid      CAT5 certified

        Note that there are different plugs for the different types of
        wire. Using the wrong plug will produce a poor quality connection.