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LEDs

The LEDs described in the following sections indicate the basic status of hardware components.

LEDs on the Craft Interface

The craft interface provides status and troubleshooting information at a glance. It is located on the front of the chassis above the FPC card cage, as shown in Figure 1 and Figure 2. The LEDs on the craft interface include two alarm LEDs. The circular red alarm LED at the upper left of the craft interface indicates a critical condition that can result in a system shutdown. The triangular yellow alarm below it indicates a less severe condition that requires monitoring or maintenance. Both alarms can occur simultaneously. For more information about the alarm LEDs, see Alarm LEDs and Lamp Test Button. For more information about the causes of alarms, see Hardware and Interface Alarm Messages.

LEDs on Hardware Components

LEDs on the faceplates of the following hardware components report their status:

PIC—Most PICs have an LED labeled STATUS on their faceplate. Some PICs have additional LEDs, often one per port. The meaning of the LED states differs for various PICs. For more information, see the M5 and M10 Internet Routers PIC Guide.
Power supply—A blue LED labeled OUTPUT OK reports the status of the power supply. For more information, see Power Supply LEDs and Self-test Button.

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