Ethernet Cable Color Coding Diagram
The T-568A and T-568B are two standards set by the TIA/EIA for the crimping of RJ-45 connectors.
Ethernet Cables have 8 color coded wires. There are two standards: T-568A and T-568B
The pins on an RJ-45 connector are numbered 1 – 8. The wires inside the network cable should be connected to the proper pin inside the RJ-45 connector.
Each wire inside a twisted pair cable consist of a solid-colored wire and a striped wire. You can use any of these two standards:
Ethernet Cable Color Coding Diagram
| # | T-568A | T-568B |
|---|---|---|
| 1 | Green/White | Orange/White |
| 2 | Green | Orange |
| 3 | Orange/White | Green/White |
| 4 | Blue | Blue |
| 5 | Blue/White | Blue/White |
| 6 | Orange | Green |
| 7 | Brown/White | Brown/White |
| 8 | Brown | Brown |
If you wired both ends of the cable the same, then it is called a straight through cable. This is the most common type of cable and are used to connect computer to switches or routers.
A Crossover cable can be used to connect two devices together directly. It reverses the sending and receiving pairs on one the one end of the cable. To create a crossover cable, you need to wire the one end of the cable with T-568A and the other end with T-568B.
UTP and STP Cables
Twisted pair cables are widely used for telecommunication and LAN networks. These cables are composed of pairs of wires, twisted together to help reduce crosstalk (interference). There are two types of twisted pair cables.
- UTP (Unshielded Twisted Pair) contains 4 pairs of wires twisted together to help prevent interference.
- STP (Shielded Twisted Pair) contains 4 pairs of wires twisted together to help prevent interference. This cable also has a metallic shielding to protect it from external interference.
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