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    LaserTempLowTh

    Table 1: Alarm Details

    Parameter

    Description

    Code

    laserTempLowTh

    Description

    Laser Temperature Below Low Temperature Threshold: The transmit laser temperature has fallen below the low temperature threshold.

    Entities Affected

    • Optical channel interfaces (see respective table below).
    • OTN OTU interfaces (see respective table below).
    • Ethernet interfaces (see respective table below).
    • SONET/SDH interfaces (see respective table below).
    • Wavelength channels (see respective table below).

    Possible Causes

    The transmit laser is malfunctioning.

    Default Severity

    Major

    Service Affecting

    No (false).

    Alarm Clearing

    See Clearing a LaserTempLowTh alarm.

    Related Fault Hierarchy

    See Fault Masking and Hierarchies.

    Table 2: Optical Channel Interfaces

    Entity Name

     

    Fault Indicator

    Module

    Indicator

    Status

    och:<chassis>/<slot>/<2>/<1>/<subport.och>

    UFM6

    Fault LED, 200G line port

    On

    Table 3: OTN OTU Interfaces

    Entity Name

     

    Fault Indicator

    Module

    Indicator

    Status

    otu4:<chassis>/<slot>/<1>/<1>

    UFM4

    Fault LED, 100G line port

    On

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

    1x CFP BIC

    Fault LED, 100G port

    otu2:<chassis>/<slot>/<subslot>/<port>

    12x SFP+ BIC

    Fault LED, 10G port

    otu2e:<chassis>/<slot>/<subslot>/<port>

    Note: Supported on UFM3 only.

    Table 4: Ethernet Interfaces

    Entity Name

     

    Fault Indicator

    Module

    Indicator

    Status

    100ge:<chassis>/<slot>/<subslot>/<port>/<subport>

    1x CFP BIC

    Fault LED, 100G port

    On

    100ge:<chassis>/<slot>/<1>/<port>

    UFM6

    Fault LED, 100G port

    10ge:<chassis>/<slot>/<1>/<port>/<subport>

    UFM6

    Fault LED, 10G port

    10ge:<chassis>/<slot>/<subslot>/<port>/<subport>

    12x SFP+ BIC

    Fault LED, 10G port

    Table 5: SONET/SDH Interfaces

    Entity Name

     

    Fault Indicator

    Module

    Indicator

    Status

    oc192:<chassis>/<slot>/<subslot>/<port>

    12x SFP+ BIC

    Fault LED, 10G port

    On

    wanoc192:<chassis>/<slot>/<subslot>/<port>

    stm64:<chassis>/<slot>/<subslot>/<port>

    wanstm64:<chassis>/<slot>/<subslot>/<port>

    Table 6: Wavelength Channels

    Entity Name

     

    Fault Indicator

    Module

    Indicator

    Status

    channel:<chassis>/<slot>/<subslot>/<port.channel>

    1x CFP BIC1

    Fault LED, 100G port

    On

    1 Reporting of this alarm for a wavelength channel is supported only on multiwavelength CFP transceivers.

    Clearing a LaserTempLowTh 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 or a transceiver.

    1. Optionally, retrieve detailed information for the interface to view the Laser Temperature and Laser Temperature Min. Threshold values:
      show interface name:identifier detail
    2. Replace either the pluggable transceiver installed in the port or, if the alarm is raised against a line-port interface provisioned on an integrated MSA, the UFM.
    3. Check for alarms on the interface.
      • If the alarm clears, you have completed this procedure.
      • If the alarm does not clear, contact your next level of support.

    Modified: 2017-04-25