Chapter 1 Product Overview

LEDs

1. POST = power-on self-test.

Power Supply Module LEDs

The switch power supply module LEDs are labeled PSU1 and PSU2 (on the switch) and PSU OK (on the power supply module). They show whether power supply modules 1 and 2 are receiving power. See Figure 1-6and Figure 1-9.

Table 1-4

Power Supply Module LEDs

 

 

 

Color

 

System Status

 

 

 

Off

 

Power supply module (1 or 2) is not installed

 

 

 

Green

 

Valid input is present, and the output is within the operating range

 

 

 

Red

 

Valid input is present, and the output is outside the operating range or is not present

 

 

 

Blinking red

 

Valid input is not present

 

 

 

Alarm LEDs

Table 1-5

Alarm Input LEDs

 

 

 

 

 

Color

 

 

System Status

 

 

 

 

 

Off

 

 

No alarm

 

 

 

 

 

Amber

 

 

Minor alarm

 

 

 

 

 

Red

 

 

Major alarm

 

 

 

 

 

Blinking red

 

 

Critical alarm

 

 

 

 

 

Table 1-6

Alarm Output LED

 

 

 

 

Color

 

System Status

 

 

 

 

Green

 

No alarm

 

 

 

 

Red

 

Relay closed, alarm present

 

 

 

 

 

Console LEDs

The console LEDs show which console port is in use. See Figure 1-6and Figure 1-9for the LED locations.

If you connect a cable to a console port, the switch automatically uses that port for console communication. If you connect two console cables, the USB console port has priority.

 

Cisco CGS 2520 Hardware Installation Guide

1-10

OL-31444-01

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Cisco Systems CGS 2520 manual Power Supply Module LEDs, Alarm LEDs, Console LEDs