Black Box IC244A-R2 ユーザーズマニュアル

 

 

4. Troubleshooting 

The following table provides troubleshooting help. The topics are arranged 
in the order in which they should be executed in most situations. If you are 
unable to resolve the problem after following these instructions, please 
contact technical support for further assistance.  

 

 

 

All LEDs on Local Unit 
are off. 

Cause: 
The Local Unit is not 
receiving power from 
the computer

 

1.  Ensure that the Local Unit is connected to a 

USB port on the computer

 

2.  Check that the computer is switched on and 

that the OS is running (not in Sleep mode).

 

Host LED on Local Unit 
is on; Link LED on 
Local Unit is off. 

Cause:  
There is no connection 
between the Local Unit 
and the Remote Unit.

 

1.  Ensure that a Category 5 UTP cable with 

straight-through conductors is connected 
between the Local Unit and the Remote Unit. 

2.  Ensure that Category 5 cables and connectors 

are used throughout the entire link between 
the Local Unit and the Remote Unit. 

3.  Check that Category 3 cable has not been 

substituted. 

4.  Check that the cable length between the Local 

Unit and the Remote Unit does not exceed 50 
metres.  

5.  Connect a short Category 5 patch cord 

between the Local Unit and the Remote Unit. 
Recheck the operation of the system.