3com NJ240FX 用户指南

59

If you encounter problems with the IntelliJack:

■

Verify the IntelliJack is receiving power by viewing the Power LED (it should be on). If 
the Power LED is not on, make sure that:

■

The local power supply is plugged into the IntelliJack and into a working 
electrical outlet.

■

Verify the IntelliJack is connected to the network properly by viewing the Link LED (it 
should be on). If the Link LED is not on, make sure the network cable:

■

Is terminated properly. Refer to the connector manufacturer’s instructions for 
terminating the cable. Be sure to test the connector and verify it is working.

■

Has a valid connection to the network. 

■

Adheres to proper length and cabling specifications for your network.

■

The IntelliJack is configured for manual MDI. Be sure to use a straight-through cable. 
If you want to use a cross-connect cable, you must change settings in the 
Configuration Manager software.

Power LED is not on

IntelliJack is not receiving 
power

■

Ensure power supply is properly 
connected.

■

Make sure the upstream switch is 
configured and active

Link LED is not on

IntelliJack has no connection 
to the network

■

Make sure network cable is properly 
terminated.  

■

Make sure the IntelliJack is connected 
to the network.  

■

Make sure the cable is plugged into 
the workgroup switch.

■

Make sure the upstream switch is 
configured and active

Green LEDs on Ports 1-4 
are not on

Network device has no 
connection to IntelliJack

■

Make sure the cable is properly 
connected to the network device.  

■

Make sure the cable is firmly 
connected to one of the four 
IntelliJack ports labeled 1-4.  

■

Make sure the cable is a good 
straight-through cable.