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34 C2649M (9/07)
Optic Fault LED ( )
Green The optical signal is
being received and
laser is operating
properly.
– No action required.
Red The optical signal is
not being received.
Remote fiber module is
not powered on.
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.
A problem exists with
the optical power
budget.
Verify that losses in fiber
optic cable do not exceed
the optical power budget
specification of the fiber
optic link. If the losses do
exceed the optical power
budget, contact Product
Support.
Flashing red Laser has shut down. Fiber module is operating
in extreme conditions; for
example, operating
temperature is below or
above recommended
range as stated in the the
Specifications section.
Ensure that fiber module
operates according to
operating conditions stated
in the Specifications
section, and then cycle the
power. If problem persists,
contact Product Support.
Laser has reached end of
life.
Cycle the power. If problem
persists, contact Product
Support.
Table F. Troubleshooting with Front-Panel Indicators (Continued)
Indicator Color Meaning Possible Cause Corrective Action