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    ModTempShutdown

    Table 1: Alarm Details

    Parameter

    Description

    Code

    modTempShutdown

    Description

    Module Temperature Shutdown: The temperature of the MSA transceiver has exceeded the high-temperature-shutdown threshold, causing the transmit laser to shut down. For information, see Temperature thresholds - MSA transceivers.

    Entities Affected

    OTN OTU interfaces (see respective table below).

    Possible Causes

    The ambient temperature is excessively higher than the normal operating range of the MSA transceiver.

    Default Severity

    Critical

    Service Affecting

    Yes (true).

    Alarm Clearing

    See Clearing a ModTempShutdown 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 ModTempShutdown Alarm

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

    Note: Refer to the BTI7800 Series Hardware Overview and Installation Guide before replacing a traffic module.

    1. Check for and resolve any of the following problems:
      • Either a cooling module is not present in the chassis or is present but is operationally down or administratively disabled.
      • A FanSpeedLowTh has been raised against a cooling module.
      • The ambient temperature is higher than the specified operating range for the chassis. For information, see the BTI7800 Series Hardware Overview and Installation Guide.
    2. Check for alarms on the OTU4 interface.
      • If the alarm has cleared, you have completed this procedure.
      • If the alarm does not clear, go to the next step.
    3. Replace the UFM4.
    4. 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: 2017-07-06