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Chapter 3
Troubleshooting
This chapter contains information on how to troubleshoot the switch in the
event that a problem occurs.
Note
If you need further assistance, please contact Allied Telesyn
Technical Support. Refer to "Contacting Allied Telesis" on page 14.
Check the Power LED on the front of the switch. If the LED is OFF,
indicating that the unit is not receiving power, do the following:
Ensure 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 using a different power cord.
Verify that the voltage from the power source is within the required
levels for your region.
Verify that the LINK/ACT LED for each port is ON. If a LINK/ACT LED is
OFF, do the following:
Verify that the end node connected to the port is powered on and is
operating properly.
Verify that the twisted pair cable is securely connected to the port on
the switch and to the port on the end node.
Ensure that the twisted pair cable does not exceed 100 meters (328
feet).
Verify that you are using the appropriate category of twisted pair cable:
Category 3 or better for 10 Mbps operation and Category 5 and
Category 5E for 100 and 1000 Mbps operation.
On those ports that are supplying PoE power to another device, verify that
the port PoE LED is solid green. If the LED is not solid green, do the
following:
Verify that the connected device is no more than 100 feet from the
switch.
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