5
CHAPTER 4
TROUBLESHOOTING
SYMPTOM
: The power LED is not lit.
SOLUTION
:
If the power LED is not lit after the power cord is plugged into the concentrator
and the power outlet, there may be a power fault.
1.First verify if there is power at the power outlet by plugging in a device which is
known to operate.
2.If a volt meter is available, measure the voltage on the power outlet.
3.If a volt meter is not available and the second power adapter does not fix the
problem, contact the authorized dealer from whom you purchased your
concentrator for assistance.
SYMPTOM
: The Link LED is not lit.
SOLUTION
:
The Link LED is not on after a workstation is connected to the STP port of the
concentrator.
1.Verify if the workstation and the concentrator are powered up.
2.Verify if the network cable has been attached to the workstation.
3.Verify if the network cable from the Hub to workstation is straight-through and is
not cross-over.
4.Verify if the wires to the phone jack pins are connected correctly and the
connections are not faulty.
SYMPTOM
: When port auto-partitioned out.
SOLUTION
:
1.Use another Ethernet adapter to verify if the original Ethernet adapter
malfunctions.
2.Connect the twisted-pair cable to another concentrator to verify if the twisted-pair
cable can work well.
