Справочник Пользователя для Cabletron Systems 8H02-16

Chapter 3: Installation

c.

Check that the twisted pair connection meets the dB loss and cable 
specifications outlined in Chapter 2.

If a link is not established, contact Cabletron Systems Technical 
Support. Refer to Section 1.7, Getting Help, for details.

4. Repeat step 2, above, until all connections have been made.

An FE-100-TX installed in port slot 15 and/or 16 is often used to provide 
a connection between the 8H02-16 and a bridge, router, or switch. 
Usually, in this configuration, a “straight-through” cable is used and the 
Fast Ethernet Interface Module crossover switch shown in Figure 3-7 is 
set to “not crossed over.”

Normally, when connecting devices to like devices, crossing over of the 
transmit and receive pairs must occur. Before connecting a segment to the 
FE-100TX, check each end of the segment to determine if the wires have 
been crossed over for the proper connection.

A schematic of a crossover cable is shown in Figure 3-6. If the wires do 
not cross over, use the switch on the FE-100TX to internally cross over 
the RJ45 port. Figure 3-7 shows how to properly set the FE-100TX 
crossover switch.

TX+

TX–

RX+

RX–

2

1

3

6

TO

10BASE-T Device Port

TX+

TX–

2

1

3

6

NOTE:
RX+/RX– and TX+/TX–
must share a common
color pair.

TO

SmartSwitch RJ45 Port

1574-30

RJ45 to RJ45

RX+

RX–