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Figure 3-9, To the crossed o, Wn in – Cabletron Systems 2M46-04R User Manual

Page 36

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Chapter 3: Installation

3-12

2M46-04R/2M46-04RDC User’s Guide

Figure 3-9

FE-100TX Crossover Switch

A schematic of a crossover cable is shown in

Figure 3-10

.

Figure 3-10

Schematic of Crossover Cable

Connect an FE-100TX to a twisted pair segment as follows:

1.

Ensure that the device connected to the other end of the segment is
powered ON.

2.

Connect the twisted pair segment to the module by inserting the RJ45
connector on the twisted pair segment into the RJ45 port on the
module shown in

Figure 3-9

.

3.

Verify that a link exists by checking that the port RX LED is ON
(flashing amber, blinking green, or solid green). If the RX LED is OFF
and the TX LED is not blinking amber, perform the following steps
until it is on:

a.

Verify that the 100BASE-TX device at the other end of the twisted
pair segment is powered up.

Position X
(crossed over)

1. RX+
2. RX-
3. TX+
4. NC

5. NC
6. TX-
7. NC
8. NC

Position =
(not crossed over)

1. TX+
2. TX-
3. RX+
4. NC

5. NC
6. RX-
7. NC
8. NC

FE-100TX

10

16651_05

100

=

x

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

RJ45 Port

2251-31

RJ45 to RJ45

RX+

RX–

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