Troubleshooting
If you find any problem, please take the following steps to check.
LED
The POWER LED (Power) is not lit.
Check if the power cord is disconnected. Please confirm that the power cord is
securely connected to the power port.
The Port LED is not lit in Status mode.
Is the cable correctly connected to the target port?
Is the cable appropriate to use?
Is the terminal connected to the relevant port conforming with 10BASE-T,
100BASE-TX, or 1000BASE-T standard?
Auto-negotiation may have failed.
Is the correct Port LED display mode selected using the LED display switch
button?
The Port LED (Right) lights in orange.
Loop is occurring. By removing the loop, orange LED will be turned off.
LOOP HISTORY LED Blinks in orange.
This is to notify that there is a port in which a loop is occurring, or has been
removed within 3 days.
Communications are slow.
Are the communication speed and mode settings correct?
If the proper communication mode signal cannot be obtained, apply
half-duplex mode.
Please reconfirm autonegotiation setting.
Do not set forced full-duplex for the equipment that the Switching Hub is
connected to.
Is not the utilization ratio of the network to which this Switching Hub is
connected too high?
Please try to separate the equipment from the network.
If communication is disabled
Are the equipment linked up?
If Embedded power-saving mode is set to “Full” ,change it to “Half” or
“Disabled” .
Is any Port LED lamp (right) lit in orange?
If a Port LED lamp (right) is lit in orange,the respective port is shut off by the
loop detection/shutoff function. Cancel loop connection under the port and
then wait for the period set for the recovery time for automatic recovery for
loop detection/shutoff or cancel port shutoff from the setting screen.
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