Allied Telesis AT-x210-9GT - Manual (Page 57)

AT-x210-9GT, AT-x210-16GT, and AT-x210-24GT Switches Installation Guide
47
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 at www.alliedtelesis.com/support.
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: 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.
„ Verify that the port is connected to the correct twisted pair cable.
This is to eliminate the possibility that the port is connected to the
wrong network device, such as a powered off device.
„ 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