Twisted Pair Ports 1 To 8 - Allied Telesis x320 Series Installation Manual

Chapter 9: Troubleshooting

Twisted Pair Ports 1 to 8

112
Problem 1: The LINK/ACT LED for a twisted pair port connected to a
network device is off.
Solutions: The port cannot establish a link with a network device. Try the
following:
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 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. Refer to "Cable Requirements" on page 21.
Verify that the port is connected to the correct twisted pair cable.

If all the port LEDs are off, the switch might be operating in the low

power mode. To toggle on the LEDs, use the ECOFRIENDLY LED
and NO ECOFRIENDLY LED commands in the command line
interface.
Note
Twisted pair ports may require five to ten seconds to establish links.