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    PosTxLow

    Table 1: Alarm Details

    Parameter

    Description

    Code

    posTxLow

    Description/Cause

    Transmit Power Out of Specification, Low: The optical power transmitted is below the specified range for operation.

    Entities Affected

    DOL optical channels (see respective table below).

    Default Severity

    Critical

    Service Affecting

    Yes (true).

    Alarm Clearing

    See Clearing a PosTxLow alarm.

    Related Fault Hierarchy

    See DOL OCH fault hierarchy.

    Table 2: DOL Optical Channels (OCHs)

    Entity Name

     

    Fault Indicator

    Module

    Indicator

    Status

    och:<chassis>/<slot>/0/L1/<channel>

    where channel is an alphanumeric string.

    ROADM2

    och:<chassis>/<slot>/0/C<n>/<channel>

    where n depends on the module and channel is an alphanumeric string.

    Clearing a PosTxLow Alarm

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

    1. Retrieve statistics for the DOL OCH:
      show statistics current och:identifier
    2. Refer to DOL OCH power alarm thresholds to determine whether the optical power transmitted is lower than the range specified for operation.
    3. If the optical power transmitted is too low, ensure that the upstream fiber connections are intact, thoroughly clean, and correctly connected.
    4. Check for alarms on the DOL OCH.
      • If the alarm clears, you have completed this procedure.
      • If the alarm does not clear, contact your next level of support.

    Modified: 2017-10-24