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26 C1648M (4/05)
Carrier Detect LED (Continued)
Red on transmitter
(continued)
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.
Red on receiver 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.
(Continued on next page)
Table C.
Troubleshooting with Front-Panel Indicators (Continued)
Indicator Color Meaning Possible Cause Corrective Action