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If you find any problem, please take the following steps to check.
1. LED indicators
* The power LED (POWER) is not lit.
- Is the correct port LED display mode selected by pressing the LED display
change button?
- Is the power cord connected? Please confirm that the power cord is
securely connected to the power port.
- Use the Switching Hub within the range of operating temperature.
* The port LED (left) is not lit on the Status mode.
- Is the Switching Hub is set to Status mode?
If the Switching Hub is set to the ECO mode, all LEDs are turned off
regardless of terminal connection state.
- Is the cable correctly connected to the target port?
- Is an appropriate cable used?
- Is each terminal connected to the relevant port conforming with 10BASE-T,
100BASE-TX, or 1000BASE-T standard?
- Auto-negotiation may have failed.
Set the port of this Switching Hub or the terminal to half-duplex mode.
* The port LED (right) is lit in orange.
- A loop is occurring. When you recover the loop, orange LED is turned off.
* LOOP HISTORY LED is blinking green.
- This is to notify that there is a port in which a loop is occurring, or has been
recovered within three days.
2. Communications are slow.
* Communications with all ports are down or slow.
- Are the communication speed and mode settings correct?
If the communication mode signal cannot be properly obtained, apply
half-duplex mode. Switch the communication mode of the connection
target to half-duplex mode. Do not fix the communication mode of the
connected terminal to full-duplex mode.
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