Allied Telesis AT-8350GB User Manual
Page 84
Troubleshooting
84
Check that the twisted pair cable is securely connected to the port
on the switch and to the port on the end node.
Make sure 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, Category 5 and
Category 5E for 100/1000 Mbps operation.
Make sure that the operating parameters of the port on the switch
are compatible with the end node to which the port is connected.
This will require using the switch’s management software. For
instructions, refer to the AT-S41 Management Software User’s
Guide for the AT-8350GB Switch.
If you installed an optional GBIC module, verify that the LINK LED for the
port is ON. If the LED is OFF, do the following:
Check to make sure that the GBIC module is completely seated in
the GBIC slot. It should click into place.
Verify that the end node connected to the port is powered ON and
is operating properly.
Check that the fiber optic cable is securely connected to the port
on the switch and to the port on the end node.
Make sure that the cable connected to the fiber optic receiver port
on the GBIC module is connected to the transmitter port on the
remote end node and that the fiber optic transmitter port on the
GBIC module is connected to the receiver port on the end node.
The GBIC port LED will be illuminated when the Tx and Rx ports
are connected properly. If the LINK LED is not illuminated, reverse
the cables. Refer to Gigabit Connector LEDs on page 27 for more
information.
Make sure that the fiber optic cable does not exceed the allowed
maximum distance. For GBIC maximum distances, refer to the
GBIC Installation Guide.
Verify that you are using the appropriate type of fiber optic cable.
For cable specifications, refer to the GBIC Installation Guide.
Use a fiber optic tester to test the attenuation on the cable to
determine if the strength of the fiber optic signal falls below