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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 ILA

    Chassis 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.

    Modified: 2017-09-13