Cabletron Systems 2E42-27 Manual Do Utilizador

Tighten the two screws on the RJ21 straight cable connector or RJ21 
angle adapter, as applicable, to secure it to the device.

If using the RJ21 angle adapter, plug the RJ21 right-angled connector 
as shown in 

Verify that a link exists by checking that the port RX LED is ON 
(flashing yellow, blinking green, or solid green). If the RX LED is 
OFF and the TX LED is not blinking yellow, perform the following 
steps until it is on:

Verify that the 10BASE-T device at the other end of the twisted 
pair segment is ON and connected to the segment.

Verify that the RJ45 connectors on the twisted pair segment have 
the proper pinouts and check the cable for continuity.

Check that the twisted pair connection meets the dB loss and cable 
specifications outlined in 

.

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

Repeat steps 1 through 5 above, until all connections have been made.

An FE-100TX installed in port slot 25 and/or 26 has an internal crossover 
switch. When connecting a workstation, use a straight-through cable and 
set the Fast Ethernet Interface Module crossover switch shown in 

 to the crossed over position marked with X. 

The cable pinouts for a 25-pair cable (RJ21) can be found in 
the Cabletron Systems 

Cabling Guide. Refer to 

 for 

details on how to obtain this document.

To ensure proper operation, use only Category 5 Unshielded 
Twisted Pair (UTP) cabling that has an impedance between 85 
and 111 ohms.