How to make a reverse ethernet cable

Written by phil altshuler
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How to make a reverse ethernet cable
Build you own reverse-wired Ethernet cable to connect two peripherals together. (ethernet cable 4 image by BlueMiniu from

Ethernet cables are wired in the straight-through or crossover (reverse-wired) configuration. A straight-through cable has the same colour pin sequence at each end. Straight-through cables connect a modem or a router to a computer or a computer peripheral. A reverse-wired cable has different connector pin wiring on each end. They connect two peripherals directly together. A crossover cable has the orange and green pairs reversed on one end.

Skill level:

Things you need

  • Cat-5 cable
  • RJ-45 connectors
  • Utility knife
  • RJ-45 crimping tool

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  1. 1

    Cut the Cat-5 cable to the length you need. Add 12 inches to allow for errors.

  2. 2

    Cut off one inch from the outer jacket of one end of the cable. Trim the cut edge of the jacket so that it is smooth and flat.

  3. 3

    Untwist the wire pairs with your fingers until they lay flat. Arrange the wires according to the colour sequence for plug number one in the tips section. Cut the wires to a length of a half-inch. Check the colour sequence again.

  4. 4

    Insert the wires into the RJ-45 plug. The clip on the plug should be on the bottom, and the open end should be facing you. Push the wires firmly into the plug until they are flush against the stop.

  5. 5

    Crimp the plug with the crimping tool. Be sure that none of the wires slipped out, that they are firmly against the stop on the connector and that they are in the correct colour pattern.

  6. 6

    Repeat Steps 2 through 5 for the other end of the cable using the wiring sequence for plug number two.

Tips and warnings

  • Plug number one wiring sequence is white/green, green, white/orange, blue, white/blue, orange, white/brown and brown.
  • Plug number two wiring sequence is white/orange, orange, white/green, blue, white/blue, green, white/brown and brown.
  • Use a good quality crimping tool. Low-cost tools may be unreliable.

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