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    APSD

    Table 1: Alarm Details

    Parameter

    Description

    Code

    apsd

    Description

    Automatic Power Shutdown: The local port has automatically shut down its laser because either the optical power received has dropped below the Loss of Light, Receive threshold or APSD has been triggered on the NE at the far end of the fiber.

    For more information about APSD, see the BTI7800 Series Software Configuration Guide.

    Entities Affected

    • DOL ports (see respective table below).
    • Terminal amplifier line ports (see respective table below).

    Possible Causes

    • The fiber connection is poor.
    • There is a problem with the fiber.
    • There is a problem at the far-end transmitter.

    Default Severity

    Critical

    Service Affecting

    Yes (true).

    Alarm Clearing

    See:

    Related Fault Hierarchy

    See:

    Table 2: DOL Ports

    Entity Name

     

    Fault Indicator

    Module

    Indicator

    Status

    port:<chassis>/<slot>/0/L1

    ROADM2 or ILA

    Fault LED, L1 port

    On

    port:<chassis>/<slot>/0/C<n>

    where the range of n depends on the module.

    Fault LED, C<n> port

    Table 3: Terminal Amplifier Line Ports

    Entity Name

     

    Fault Indicator

    Module

    Indicator

    Status

    line:<chassis>/<slot>/1/<portNum>

    AMP1

    Fault LED, Line port

    On

    Clearing an APSD Alarm (DOL Port)

    Note: Follow all applicable safety requirements as described in the BTI7800 Series Hardware Overview and Installation Guide.

    1. Check for and clear the following alarms and conditions:
      • LoLightRx raised against the DOL OSC and the DOL OMS
      • ContComS raised against the DOL OSC
      • OmsAis raised against the DOL OMS
    2. Check for alarms on the DOL port.
      • If the alarm has cleared, you have completed this procedure.
      • If the alarm does not clear, go to the next step.
    3. Check for and clear an APSD alarm on the NE at the far-end of the fiber.
    4. Check for alarms on the local DOL port.
      • If the alarm has cleared, you have completed this procedure.
      • If the alarm does not clear, contact your next level of support.

    Clearing an APSD Alarm (terminal Amplifier Line Port)

    Note: Follow all applicable safety requirements as described in the BTI7800 Series Hardware Overview and Installation Guide.

    1. Check whether an LoLightRx alarm has been raised against the input amplifier Optical Supervisory Channel on the line port, and clear the alarm if it exists.
    2. Check for alarms on the terminal amplifier line port.
      • If the alarm has cleared, you have completed this procedure.
      • If the alarm does not clear, go to the next step.
    3. Check for and clear an APSD alarm on the far-end NE.
    4. Check for alarms on the local terminal amplifier line port.
      • If the alarm has cleared, you have completed this procedure.
      • If the alarm does not clear, contact your next level of support.

    Modified: 2017-04-25