CABLES

10BASE-T/100BASE-TX Pin Assignments

With 10BASE-T/100BASE-TX cable, pins 1 and 2 are used for transmitting data, and pins 3 and 6 for receiving data. The “+” and “-” signs in the tables below are used to represent the polarity of the wires that make up each wire pair.

RJ-45 Pin Assignments

Pin Number

Assignment*

1Tx+

2Tx-

3Rx+

6Rx-

*The “+” and “-” signs are used to represent the polarity of the wires that make up each wire pair.

Straight-Through Wiring

If the twisted-pair cable is to join two ports and only one of the ports has an internal crossover, the two pairs of wires must be straight-through.

Straight-Through RJ-45 Pin Assignments

End 1

End 2

 

 

1 (Tx+)

1 (Tx+)

 

 

2 (Tx-)

2 (Tx-)

 

 

3 (Rx+)

3 (Rx+)

 

 

6 (Rx-)

6 (Rx-)

 

 

B-4