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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.