Troubleshooting - Panasonic PN28080K Operation Manual

Troubleshooting

If you find any problem, please take the following steps to check.
1. LED indicators
* The POWER LED is not lit.
- Is the power cord connected?
 Please confirm that the power cord is securely connected to the power
port.
* The port LED (left) is not lit in Status mode.
- Is the Switching Hub 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 the cable appropriate to use?
- 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) lights in orange.
- A loop has occurred. 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.
2. Communications are slow.
* Communications with all ports are impossible 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.
- Is the link up?
 If the power saving mode is set to "Full," change it to "Half" or "Disabled."
- Is not the utilization ratio of the network to which this Switching Hub is
connected too high?
 Try separating this Switching Hub from the network.
- Doesn't the port LED (right) light in orange?
 When the port LED (right) lights in orange, the port has been shut down
by loop detection function. After removing the loop under this port, wait
for the auto-recovery time set in loop detection function, or unblock the
port on the configuration screen.
436