Chapter 3: Troubleshooting - Allied Telesis AT-GS950/8 Installation Manual

Chapter 3
Troubleshooting
This chapter contains information on how to troubleshoot the switch if a
problem occurs.
Note
For further assistance, please contact Allied Telesis Technical
Support. Refer to "Contacting Allied Telesis" on page 14.
Problem 1: The POWER LED on the front of the switch is off.
Solutions: The unit is not receiving power. Try the following:
Verify that the power cord is securely connected to the power source

and to the AC connector on the back panel of the switch.
Verify that the power outlet has power by connecting another device

to it.
Try connecting the unit to another power source.

Try a different power cord.

Verify that the voltage from the power source is within the required

levels for your region.
Problem 2: All of the port LEDs are off even though the ports are
connected to active network devices.
Solution: The switch is probably operating in low power mode. To toggle
on the LEDs, press the eco-friendly button on the front panel.
Problem 3: A twisted pair port on the switch is connected to a network
device but the port's LINK/ACT LED is off.
Solutions: The port is unable to establish a link to a network device. Try
the following:
Verify that the network device connected to the twisted pair port is

powered on and is operating properly.
Verify that the twisted pair cable is securely connected to the port on

the media converter channel and to the port on the remote network
device.
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