Table 1-2, System status leds, Figure 1-3 – Transition Networks SM24-100SFP-AH User Manual
Page 20: System status led

Introduction
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Figure 1-3. System Status LED
Table 1-2 System Status LEDs
LED
Condition
Status
Pwr
(Power)
On Green
Internal power is operating normally.
On Amber
Internal power supply has failed.
Off
Power off or failure.
BPS
On Green
The backup power supply is operating normally.
On Yellow
The backup power supply is plugged in but faulty, such as a
thermal or fan failure.
Off
No backup power supply is connected.
OK (Diagnostic) On Green
System self-diagnostic test successfully completed.
Blinking Green
System self-diagnostic test in progress.
On Amber
System self-diagnostic test has failed.
System Status LEDs