Color Codes

There are two color layouts specified by the Ethernet standard:

 

568A

1. White-Green
2. Green
3. White-Orange
4. Blue
5. White-Blue
6. Orange
7. White-Brown
8. Brown

 568B

1. White-Orange
2. Orange
3. White-Green
4. Blue
5. White-Blue
6. Green
7. White-Brown
8 Brown
 

 

  

You might see either of those two standards in network cables. Just remember:

Straight through cables - make both ends exactly the same, use only one of the two color codes above for both ends of the cable.

Crossover cables - make both ends different, one end with 568A and the other with 568B.
Crossover cables have different ends, since they have the send and receive pairs switched.

Actually, you can get away with remembering only one of the 568 types above to make straight through cable. You then need to also remember that the green and orange pairs are swapped to make a crossover cable.

Remember:

- 568A on both ends is a straight through cable.
- 568B on both ends is a straight through cable.
- 568A on one end and 568B at the other is a crossover cable. 

 

Pin Numbers and Their Use

 

Color 568A Pin 568B Pin Description
 White / Green
           
1 3  RcvData +
 Green
 
 2 6  RcvData -
 White / Orange
           
3 1  Tx Data +
 Blue
 
 4 4  unused
 White / Blue
           
5 5  unused
 Orange
 
 6 2  Tx Data -
 White / Brown
           
7 7  unused
 Brown
 
 8 8  unused

 

 

http://www.speedguide.net/articles/how-to-make-network-cables-118