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Cisco CGS 2520 Hardware Installation Guide
78-19377-02
Chapter 1 Product Overview
Cable Side
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 and Figure 1-9.
Alarm LEDsConsole LEDs
The console LEDs show which console port is in use. See Figure 1-6 and Figure 1-9 for 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.
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
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
Table 1-7 RJ-45 and USB Console Port LEDs
LED Color Description
RJ-45 console port Green RJ-45 console port is active.; USB console port LED is off
Off Port is not active; USB console port is active
USB console port Green USB console port is active; RJ-45 console port LED is off
Off Port is not active; RJ-45 console port is active