Enterasys mrxi-22 User Guide

cable from Cabletron Systems, it is labeled so that: at one end of the 
cable, one fiber is labeled 1, and the other fiber is labeled 2. This 
pattern is repeated at the other end of the cable. If you did not 
purchase your cable from Cabletron Systems, be sure you have 
labeled your cable in the manner described above.

CAUTION: Do not touch the ends of the fiber optic strands, and do not let 
the ends come in contact with dust, dirt, or other contaminants. 
Contamination of the ends can cause problems in data transmissions.
If the ends become contaminated, clean them with alcohol using a soft, 
clean, lint free cloth.

To connect a fiber optic link segment to an EPIM-F1 or an EPIM-F2:

1. Remove the protective plastic covers from the fiber optic ports on the 

applicable port on the module and from the ends of the connectors on 
each fiber strand. 

2. Attach the fiber labeled 1 to the applicable receive port, labeled RX, 

on the module. See Figure 3-13.

3. Attach the fiber labeled 2 to the applicable transmit port labeled TX, 

on the module.

4. At the other end of the fiber optic cable, attach the fiber labeled 1 to 

the transmit port of the device.

5. Attach the fiber labeled 2 to the receive port.

6. Check that the LNK LED on the applicable port on the module is lit. 

If the LED is not lit, perform each of the following steps until it is:

a.

Check that the power is turned on for the device at the other end of 
the link.

b. Verify that the fiber strands are properly “crossed over” between 

the applicable port on the module and the fiber optic device at the 
other end of the fiber optic link segment.

 

LNK

EPIM-F1/F2

RX

TX

LNK

EPIM-F3

RX

TX