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Cisco ONS 15501 User Guide
78-14134-02, Release 2.0
Chapter 1 Product Overview
Cisco ONS 15501 Front Panel
Cisco ONS 15501 LED Alarm Definitions
The Cisco ONS 15501 front panel has three LEDs:
• The green POWER LED turns on or off to reflect the following conditions:
–
On: Both power supply voltages are within tolerance (the Cisco ONS 15501 is powered
normally).
–
Off: Both power supply voltages outside of tolerance or unit not powered up.
–
Blinking: One of the power supply voltages outside of tolerance.
• The red FAIL LED turns on or off to reflect the following conditions:
–
On: The pump laser bias, pump laser temperature, or power supply is out of tolerance. This LED
indicates a major internal failure, such as an overtemperature condition or a failure in the pump
laser or power supply.
–
Off: The pump laser bias, pump laser temperature, and power supply are in the specified range.
• The yellow LOS LED turns on or off to reflect the following conditions:
–
On: Input signal level is below the loss-of-input threshold.
–
Off: Input signal level is above the minimum input power threshold.