Determining the Operating Status
Status LEDs
Beta Draft Confidential
5-64/5/03 CBX 500 Multiservice WAN Switch Hardware Installation Guide
Power Supply Status LEDs
Each power supply has Good and Failed status LEDs to indicate the operational status
of the power supply.
DC Power Failures - LED Status
In addition to the standard LED conditions described in Table 5-5, DC power supply
green LEDs have additional blinking patterns that indicate possible loss of power on
either of the 48V power-source inputs (A and B) to the DC power supplies. Failure on
either DC power source results in a slow blinking of the green LEDs on all three
power supplies.
Table 5-6 describes the LED blinking pattern for failures on DC power sources,
AandB.
Table 5-5. AC/DC Power-Supply LEDs
LED Condition Indicates
Good (Green) ON The power supply is fully operational.
Red (Failed) BLINKING The power supply has a partial failure but is still
operational. Replacement is recommended.
Red (Failed) ON The power supply is not working.
Table 5-6. DC Power Failures - LED Status
Green LED Blinking Pattern Indicates Power Failure on
Three seconds ON, one second OFF DC Input A
Three seconds ON, one second OFF; then one
second ON and one second OFF
DC Input B
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