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    ModTempLowTh

    Table 1: Alarm Details

    Parameter

    Description

    Code

    modTempLowTh

    Description

    Module Temperature Below Low Threshold: The temperature of the MSA transceiver is below low-temperature threshold. For information, see Temperature thresholds - MSA transceivers.

    Entities Affected

    OTN OTU interfaces (see respective table below).

    Possible Cause

    The ambient temperature is lower than the normal operating range of the chassis.

    Default Severity

    Major

    Service Affecting

    No (false).

    Alarm Clearing

    See Clearing a ModTempLowTh alarm.

    Related Fault Hierarchy

    See Common fault hierarchy - OTN and CBR ports.

    Table 2: OTN OTU Interfaces

    Entity Name

     

    Fault Indicator

    Module

    Indicator

    Status

    otu4:<chassis>/<slot>/<subslot>/<port>

    UFM4

    Fault LED, 100G line port

    On

    Clearing a ModTempLowTh Alarm

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

    1. Optionally retrieve statistics for the OTU4 interface to view the value of the Module temperature parameter:
      show statistics current otu4:identifier
    2. Retrieve environment information to view data on equipment temperature, and ensure that the ambient temperature is within the specified range for chassis operation. For information, see the BTI7800 Series Hardware Overview and Installation Guide.
      show environment
    3. Check for alarms on the interface.
      • If the alarm has cleared, you have completed this procedure.
      • If the alarm does not clear, contact your next level of support.

    Modified: 2017-10-24