Chapter 3: Installation

Position X (crossed over)

1.RX+ 5. NC

2.RX- 6. TX-

3.TX+ 7. NC

4.NC 8. NC

x

 

 

 

=

 

 

 

 

 

10

100

FE-100TX

Position =

(not crossed over)

1.TX+ 5. NC

2.TX- 6. RX-

3.RX+ 7. NC

4.NC 8. NC

16651_05

Figure 3-8 FE-100TX Crossover Switch

A schematic of a crossover cable is shown in Figure 3-9. If the wires do not cross over, use the switch on the FE-100TX to internally cross over the RJ45 port.

NOTE:

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

 

TO

 

 

 

 

 

TO

 

RJ45 Port

 

10BASE-T Device Port

RX+

 

 

 

 

 

 

 

 

 

RX+

1

 

 

 

 

 

 

 

1

RX–

2

 

 

 

 

 

 

 

2

RX–

TX+

3

 

 

 

 

 

 

 

3

TX+

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TX–

6

 

 

 

 

 

 

 

6

TX–

 

 

 

 

 

RJ45 to RJ45

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2251-31

Figure 3-9 Cable Pinouts - RJ45 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 3-10.

3-12

2E43-51/2E43-51R User’s Guide

Page 36
Image 36
Cabletron Systems 2E43-51R manual FE-100TX Crossover Switch