Cabletron Systems ELS10-26TX User Manual

Technical Specifications

A-5

Each twisted-pair link segment must have a male connector attached to 
both ends. According to the 10BASE-T specification, pins 1 and 2 on the 
connector are used for receiving data; pins 3 and 6 are used for 
transmitting data, as shown in Table A-3.

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

If the twisted-pair link segment is to join two ports on a switch, 
and only one of the ports has an internal crossover, the two pairs of 
wires must be straight-through, as shown in Table A-4.

1

Rx+

2

Rx-

3

Tx+

6

Tx-

1 (Rx+) 

1 (Tx+)

2 (Rx-) 

2 (Tx-)

3 (Tx+) 

3 (Rx+)

6 (Tx-) 

6 (Rx-)