Fiber Optic Or Twisted Pair Transceivers - Allied Telesis SwitchBladex8112 Installation Manual

Chapter 12: Troubleshooting

Fiber Optic or Twisted Pair Transceivers

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The L/A LEDs on the transceiver slots are solid or flashing green when
transceivers have links to end nodes. If a transceiver is cabled to an end
node but the L/A LED is off, try the following:
 If all the L/A LEDs on the line cards in the chassis are off, try
pressing the eco-friendly button on the active master controller
card to turn on the LEDs.

Check that the transceiver is firmly inserted into the slot on the line
or controller card.
 Check that both ends of the cable are securely connected to the
ports on the transceiver and end node.

Verify that the end node is powered on and operating properly.

Try replacing the cable.
Here are additional steps for fiber optic transceivers:

Verify that the Ethernet line card or expansion module supports the
transceiver. Refer to Table 6 on page 37 and the SwitchBlade
x8112 product web page on the Allied Telesis web site.
 Review the operating specifications of the transceiver and end
node to verify that the devices have the same speed and duplex
mode.
 Check that the operating specifications, including wavelength and
maximum operating distance, of the transceiver are compatible
with the fiber optic port on the end node.
 Make sure that you are using the appropriate type of fiber optic
cable and that the cable length does not exceed the allowed
maximum distance. The cable specifications for the transceivers
are provided in the installation instructions that ship with the
modules.
 Use a fiber optic tester to test whether the optical signal is too
weak (i.e., sensitivity) or too strong (i.e., maximum input power).
The operating specifications of the fiber optic transceivers are
shipped with the units.
 Check the two strands of the fiber optic cable to be sure that the
receive fiber connector is connected to the transmit connector on
the remote end node, and that the transmit fiber connector is
connected to the receive connector on the end node.
Section II: Installing the Chassis