Network Wiring Instructions for RJ11 and RJ45

 

  1. RJ-11 (Telephone) Plug



    Image of RJ-11 connector

    Diagram of a RJ-11 color wiring

    Figure 1

    Wiring of wall jack for RJ-11

    Figure 1 is the wiring scheme for the plug side of an RJ-11 connector. The diagram is shown with the "hook clip" on the underside. The typical RJ-11 connector has six terminals. Usually, only the middle four pins are used. The POTS (Plain Old Telephone Service) residential telephone wiring generally contains two pairs of wires - designed for two separate telephone lines. The center pins (Red and Green) contain the first telephone line. Please note that business (digital) phone systems may be wired differently.
  2.  

  3. RJ-45 (DATA) Plug Wiring



    Image of RJ-45 plug and Pin 1 indicated

    Diagram of the T-568B standard

    Figure 2

    Figure 2 is the wiring scheme for the plug side of an RJ-45 connector in accordance with T-568B standards. The T-568B standard is the most commonly used. The wiring diagram is shown with the "hook clip" on the underside. The wall jack may be wired in a different sequence because the wires may be crossed inside the jack. The jack should have a wiring diagram or designated pin numbers/colors to match up to the color code below. When wiring a jack or an RJ-45 plug, remember to keep the “twist” as close as possible to the (jack or plug) receptacle. This will insure compliance with Ethernet wiring standards.

    Specification T-568B

    Pin # Color Pair # Name
    1 white/ orange 2 Transmit Data +
    2 orange 2 Transmit Data -
    3 white/ green 3 Receive Data +
    4 blue 1 not used
    5 white/ blue 1 not used
    6 green 3 Receive Data -
    7 white/ brown 4 not used
    8 brown 4 not used

    (Even pin numbers are always solid color. Odd pin numbers are white/ stripe color.)

    For reference purposes only, Figure 3 details the wiring scheme according to T-568A standards. Be sure adhere to EITHER the T-568B or the T-568A standard. Do not mix different wiring specifications within the same wiring installation.

    RJ-45 plug and Pin 1 indicated

    Detail diagram of T-568A standard

    Figure 3


    Specification T-568A

    Pin # Color Pair # Name
    1 white/ green 3 Receive Data +
    2 green 3 Receive Data -
    3 white/ orange 2 Transmit Data +
    4 blue 1 not used
    5 white/ blue 1 not used
    6 orange 2 Transmit Data -
    7 white/ brown 4 not used
    8 brown 4 not used

    Crossover Cable
    Some applications may require a crossover cable. The most common use of a crossover cable occurs in wiring together two Hubs. A crossover cable “crosses over” Transmit and Receive Data. Pins 1 and 3 are crossed over, and Pins 2 and 6 are crossed over. To build a CROSSOVER cable, simply wire one side according to specification T-568B, and wire the other side according to T-568A.


  4. 110 Block / 66 Block Punchdown

    Punchdowns are made with the pairs in order with the white-stripe wire first, then the colored wire.

    Pair 1 white/blue - Blue
    Pair 2 white/orange - Orange
    Pair 3 white/green - Green
    Pair 4 white/brown - Brown

 

Reminder hint: BLOGBLue Orange Green and Brown

Color diagram of punchdown block order

Punchdown Block Order

 

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