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Chapter 6
Troubleshooting
This chapter contains suggestions on how to troubleshoot the switch if a
problem occurs.
Note
For further assistance, please contact Allied Telesis Technical
Support at www.alliedtelesis.com/support.
Problem 1: All the LEDs on the switch are off.
Solutions: Try the following:
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: 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 cable is securely connected to the ports on the
switch and network device.
Verify that the port is connected to the correct twisted pair cable.
Verify that the network device connected to the twisted pair port is
powered on and is operating properly.
Try connecting another network device to the twisted pair port with
a different cable. If the twisted pair port is able to establish a link,
then the problem is with the cable or the other network device.
Verify that the twisted pair cable does not exceed 100 meters (328
feet).
Verify that you are using the appropriate category of twisted pair
cable. The cable types are listed in Table 1 on page 13.
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