Power Supply Module Leds; Alarm Leds; Console Leds - Cisco CGS 2520 Hardware Installation Manual

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 1-6
Table 1-4
Color
Off
Green
Red
Blinking red

Alarm LEDs

Table 1-5
Color
Off
Amber
Red
Blinking red
Table 1-6
Color
Green
Red

Console LEDs

The console LEDs show which console port is in use. See
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
and Figure 1-9.
Power Supply Module LEDs
System Status
Power supply module (1 or 2) is not installed
Valid input is present, and the output is within the operating range
Valid input is present, and the output is outside the operating range or is not present
Valid input is not present
Alarm Input LEDs
System Status
No alarm
Minor alarm
Major alarm
Critical alarm
Alarm Output LED
System Status
No alarm
Relay closed, alarm present
Chapter 1
Figure 1-6 and Figure 1-9
Product Overview
for the LED
OL-31444-01