Cabletron Systems 3H08-04 사용자 설명서

Two Ethernet 100BASE-TX devices can communicate only if the 
transmitter on one device is connected to the receiver on the other device. 
This reversal, or crossover function, can be implemented either in the 
wiring or in the device itself. The 3H02-04 contains an internal port 
crossover on the second connection of each port. This means that you can 
choose to use either crossover or straight-through cabling. 

When connecting two identical twisted-pair ports (i.e., both crossover 
ports or both straight-through ports), you must implement a crossover in 
the wiring. Refer to the following table for crossover wiring configuration 
for the 3H02-04.

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

1

Tx+

2

Tx–

3

Rx+

6

Rx–

Hub (pin number)

Device (pin number)

1

3

2

6

3

1

6

2