Crossover Cable Wiring Pinout and Diagram

Crossover Cable Wiring Pinout and Diagram

A crossover cable also known as “Xover cable” follows the T568A scheme at one end, and T568B scheme at the other. This effectively crosses over the connections between transmit and receive pins.

Crossover Pinout Configuration

 PinT568A T568BPin 
TX+1Colour Pinout Green-White Colour Pinout Orange-White1TX+
TX-2Colour Pinout Green Colour Pinout Orange2TX-
RX+3Colour Pinout Orange-White Colour Pinout Green-White3RX+
 4Colour Pinout Blue Colour Pinout Blue4 
 5Colour Pinout Blue-White Colour Pinout Blue-White5 
RX-6Colour Pinout Orange Colour Pinout Green6RX-
 7Colour Pinout Brown-White Colour Pinout Brown-White7 
 8Colour Pinout Brown Colour Pinout Brown8 
  • Pin 3 (RX +) connects to pin 1 (TX +)
  • Pin 6 (RX –) connects to pin 2 (TX –)
  • Pin 1 (TX +) connects to pin 3 (RX +)
  • Pin 2 (TX –) connects to pin 6 (RX –)

Used For

Used for making back-to-back connections between two similar interfaces or pieces of communications equipment.

Used for connecting similar network communications equipment that does not have crossover or uplink ports.

  • Hub to hub
  • Router to router / between two routers
  • Switch to switch / between switches
  • For computer to computer
  • PC to PC

Example use

If you were building a home network for transferring files between two computers, then a crossover cable connected to their network interface cards would facilitate the communication.

If you needed to network two computers, such as laptop-to-laptop file sharing, then providing they both have RJ45 interfaces, you could use a crossover cable for data communications.

Modern operating systems such as Windows 7 provide very simple and easy to use software for data communication between two computers.

How to identify a crossover cable

  • Such a cable has letters marked on the sockets. One end marked with “A” and the other end “B”.
  • Such a cable may have a yellow jacket.
  • Visual side-by-side comparison of the colour sequence reveals green and orange pairs reversed.


These cables are readily and cheaply available from many online sources such as eBay, Amazon, and Maplin.

These days, the cost of the connectors, wires, and time, works out more expensive than a ready-made wire.

Instead of making your own using a crimping tool, it is more economical to buy machine manufactured ones. The ones with rubber-moulded plugs will be far more robust.

This Article Continues...

Network Cables
RJ45 Wiring Diagram T568A Standard
RJ45 Wiring Diagram T568B Standard
RJ45 Wiring Straight-through Cable
Crossover Cable Wiring Pinout and Diagram
RJ45 Wiring Tips
How to use RJ45 CAT 6 Crimp Tool
NS-468 LAN Cable Tester