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C1679M (1/06) 17
Optic Fault LED - Transmitter
Green Laser is operating
properly.
– No action required.
Flashing red Laser has shut down. Transmitter is
operating in extreme
conditions, for
example, operating
temperature is below
or above recommended
range as stated in the
the Specifications
section.
Ensure that transmitter
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.
Optic Fault LED - Receiver
Green The optical signal is
being received from
the transmitter.
– No action required.
Red The optical signal is
not being received
from the transmitter.
Transmitter 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.
Table A. Troubleshooting with Front-Panel Indicators (Continued)
Indicator Color Meaning Possible Cause Corrective Action