Instruction manual

1. Components Overview

(2) LED

Table 1-9 LED indications

Name Type Status Description

STATUS

LED: Green,

orange, or red

Indicates the operating

status of the basic

switching unit.

Green: Operation is possible.

Orange: A reset is in progress.

Blinking green: Startup is in progress.

Red: A failure has been detected.

Off: Power is off. (The basic switching

unit can be replaced.)

#1#2

ACTIVE LED: Green

Indicates whether the

basic switching unit is the

active system or the

standby system.

Green: Indicates the active system.

Off: Indicates the standby system.

#1: A basic switching unit can be turned off by the Inactivate operation from the

system operation panel or by entering a command from the operation terminal. Note

that immediately after the Inactivate operation is performed for the basic switching

unit in the active system, the ACTIVE LED might be lit even if the STATUS LED is

turned off. While the ACTIVE LED is lit, the basic switching unit is running.

Before removing the basic switching unit, you must wait until both the STATUS LED

and the ACTIVE LED are turned off.

#2: If no system recovery is set, the basic switching unit is also turned off in the

following cases:

z When a failure occurred in the basic switching unit. (The STATUS LED turns

red, and then it turns off.)

z When a failure occurred in a basic control unit (when the basic control unit is

not duplicated)