Allied Telesis AT-MCF2012LC/1 User Manual
Page 56
Chapter 3: Troubleshooting
56
After setting the channel to the Smart MissingLink or Link
Test mode, observe the Link LEDs for the ports of the
channel again. If the Link LED for the twisted pair port is off,
go to Problem 3. If the Link LED for the fiber optic port is off,
go to Problem 4.
Problem 3: The Link LED for the fiber optic port in a
channel is on or blinking, but the Link LED for twisted pair
port of the same channel is off.
Solution: The twisted pair port of the channel has failed to
establish a link with its networking device. Try the following:
Verify that the networking device connected to the
twisted pair port is powered on and operating properly.
Verify that the twisted pair cable is securely connected
to the port on the media converter channel and the port
on the remote networking device.
Verify that the correct twisted pair cable is connected to
the port in the channel. This is to eliminate the possibility
that an unused twisted pair cable was inadvertently
connected to the port or that the cable is connected to
the wrong remote networking device, such as a
powered off device.
Try connecting another networking 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 networking device.
If you installed the optional management module in the
chassis, use the management software to verify that the
port is enabled.
Problem 4: The Link LED of the twisted pair port in a
channel is on or blinking, but the Link LED of the fiber optic
port in the same channel is off.
Solution: The fiber optic port of the channel is unable to
establish a link to its networking device. Try the following:
Verify that the networking device connected to the fiber
optic port is operating properly.
Verify that the fiber optic cable is securely connected to
the port on the media converter channel and the port on
the remote networking device.
Verify that the operating specifications of the fiber optic
port on the remote networking device are compatible
with the port on the media converter module. For port