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Optical ILA Chassis Status LEDs

The optical ILA has five status LEDs on the front panel of the chassis (see Figure 1)—two Optical Supervisory Channel status LEDs (OSC A and OSC B), a system status LED (SYS), an alarm LED (ALM), and a power LED (PWR) The OSC is a separate channel that carries overhead information for network management purposes. The OSC, which is an important section in every DWDM system, carries voice and data between sites for monitoring and controlling specifications in the system.

Figure 1: Chassis Status LEDs on an Optical ILAChassis Status LEDs on an Optical ILA
  1

OSC B (OSC B) LED

  4

Alarm (ALM) LED

  2

OSC A (OSC A) LED

  5

Power (PWR) LED

  3

System status (SYS) LED

 

Table 1 describes the chassis status LEDs on an optical ILA.

Table 1: Optical ILA Chassis Status LEDs

Name

Color

State

Description

OSC A status (OSC A) LED

Unlit

Off

The power is off.

Red

On steadily

No OSC signal is received from the downstream device.

Amber

On steadily

OSC signal received from the upstream device indicates a fault.

Green

On steadily

OSC signal is communicating normally.

OSC B status (OSC B) LED

Unlit

Off

The power is off.

Red

On steadily

No OSC signal is received from the downstream device.

Amber

On steadily

OSC signal received from the upstream device indicates a fault.

Green

On steadily

OSC signal is communicating normally.

System status (SYS) LED

Unlit

Off

The power is off, or the optical ILA is not connected to any power source.

Green

On steadily

The optical ILA software has booted.

Green

Blinking

The optical ILA is active and is communicating with upstream and downstream network elements.

Alarm (ALM) LED

Unlit

Off

The optical ILA is off, or there is no alarm.

Red

On steadily

A major hardware fault has occurred, such as a temperature alarm or a power or pump failure, and the unit has halted. The CLI is still accessible.

Amber

On steadily

A minor alarm has occurred, such as a software error.

Green

Solid

The optical ILA is operating properly.

Power (PWR)

Unlit

Off

The optical ILA is powered off or there is no power to the device.

Amber

On steadily

The optical ILA is powered by a single power supply. The second power supply is either missing or not connected to a power source.

Green

On steadily

The optical ILA is powered with two redundant power supplies.