Справочник Пользователя для Cabletron Systems 8H02-16

Chapter 3: Installation

3. Verify that a Link exists by checking that the port RX LED is on 

(flashing green or yellow or on solid green). If the RX LED is off, 
perform the following steps until it is on:

a.

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

b. Verify that the RJ45 connector on the twisted pair segment has the 

proper pinouts.

c.

Check the cable for continuity.

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

e.

Confirm that the crossover switch is in the correct position.

If a Link is not established, contact Cabletron Systems Technical Support. 
Refer to Section 1.7, Getting Help, for details.

The FE-100FX has an SC style network port (see Figure 3-8). Cabletron 
Systems supplies fiber optic cable that uses SC style connectors that are 
keyed to ensure proper crossing over 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.