Enterasys mrxi-22 User Guide

c.

Check the cable for continuity.

d. Check that the twisted pair connection meets dB loss and cable 

specifications outlined in 10BASE-T Twisted Pair Network 
Requirements.

e.

Check that the cross-over switch is in the correct position.

If a link still has not been established, contact Cabletron Systems 
Technical Support.

Before connecting a segment to the EPIM-T, check each end of the 
segment to determine if the wires have been crossed-over for the proper 
connection (see Figure 3-11 for proper pin-outs). If the wires are not 
crossed-over you can use the switch on the EPIM-T (Figure 3-9) to 
internally cross-over the RJ-45 port, eliminating the need to rewire the 
twisted pair segment going into the port. If the wire is crossed-over, set 
the switch on the EPIM to the

 =

 position. If not crossed-over, set the 

switch to the 

 position.

TX+

TX–

RX+

RX–

2

1

3

6

NETWORK

Port (1-12)

10BASE-T

 DevicePort

TX+

TX–

2

1

3

6

RX+

RX–

RJ-45 to RJ-45

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