GE A8950CC - Manual (Page 7)

LED operating status
Optic LED
RED Indicates faulty LASER or no module installed
OFF LASER operating within specifications
3. Verify fiber connectivity:
Using the LEDs on the back of the unit adjacent to the optic module, verify proper
operation as shown in the table below. Both optical launch power and optical receive
power, as well as transceiver status, can be verified from the LCD front panel.
Tx
GREEN Indicates sufficient power received and frame synchronization
OFF Indicates insufficient optical power
Rx
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