Cabletron Systems 2E48-27R 用户手册

Chapter 3: Installation

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 

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:

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

Verify that the RJ45 connector on the twisted pair segment has the 
proper pinouts.

Check the cable for continuity.

Make sure that the twisted pair connection meets the db loss and 
cable specifications outlined in 

.

Confirm that the crossover switch is in the correct position.

If a link is not established, contact the Cabletron Systems Global Call 
Center. Refer to 

The FE-100FX and FE-100F3 have an SC style network port (see 

). Cabletron Systems supplies fiber optic cable that uses SC 

style connectors, which are keyed to ensure proper crossover of the 
transmit and receive fibers.

An odd number of crossovers (preferably one) must be 
maintained between devices so that the transmit port of one 
device is connected to the receive port of the other device and 
vice versa.

If the fiber optic cable being used has SC style connectors that 
do not resemble MIC style connectors, or has SC connectors 
on one end and a different type on the other, such as ST 
connectors, ensure that the proper crossing over occurs.