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16 C2652M (1/08)
TX Optical Link Loss
Flashing red Laser has shut down. Transmitter is operating in extreme
environmental conditions; for example,
operating temperature is below or
above recommended range (refer to
Specifications on page 17).
Ensure that transmitter operates
according to recommended operating
conditions, and then cycle the power.
If problem persists, contact
Product Support at 1-800-289-9100 or
1-559-292-1981.
Laser has reached end of life. Cycle the power. If problem persists,
contact Product Support at
1-800-289-9100 or 1-559-292-1981.
RX Optical Link Loss
Red The optical signal is not
being received from the
transmitter.
Power is not being applied to the
transmitter.
Check power connections. Replace
power supply if necessary.
Fiber optic cable is not connected. Check fiber optic connections.
Fiber optic cable connectors are dirty
or are damaged.
Clean, polish, or replace fiber optic
cable connectors as necessary.
Fiber optic cable is defective. Replace cable.
Optical dB losses in the fiber optic
installation exceed the optical power
budget specification (refer to
Specifications on page 17).
Check for problems with the fiber
optic installation, for example,
excessive dB losses in connectors,
splices, patch panels, cables,
and so on.
Optical dB losses in the fiber optic
installation meet the optical power
budget specification (refer to
Specifications on page 17); however,
the receiver may be defective.
Contact Product Support at
1-800-289-9100 or 1-559-292-1981.
Table B. Troubleshooting Front-Panel Indicators (Continued)
Indicator Color Meaning Possible Cause Corrective Action