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OSN 500 550 580 V100R008C50 Alarms and Performance Events Reference 02

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The POWER_ABNORMAL alarm indicates a power failure. This alarm is reported if one power supply of the NE fails.


Alarm Severity Alarm Type


Equipment alarm


When you view an alarm on the network management system, select the alarm. In the Alarm Details field display the related parameters of the alarm. The alarm parameters are in the following format: Alarm Parameters (hex): parameter1 parameter2...parameterN. For details about each parameter, refer to the following table.

Name Meaning



  • 0x01 0x00: Power supply 1 has no power input.
  • 0x01 0x01: Power supply 1 is overvoltage.
  • 0x01 0x02: Power supply 1 is undervoltage.
  • 0x02 0x00: Power supply 2 has no power input.
  • 0x02 0x01: Power supply 2 is overvoltage.
  • 0x02 0x02: Power supply 2 is undervoltage.
TNM1CQ1 0x14 0x00: A power component is faulty.



  • 0x01: The 1.2 V power supply is abnormal.
  • 0x02: The 1.0 V power supply is abnormal.
  • 0x03: The 1.8 V power supply is abnormal.
  • 0x04: The 3.3 V standby power supply is abnormal.
  • 0x05: The 3.3 V power supply is abnormal.
  • 0x06: The 2.5 V power supply is abnormal.
  • 0x07: The 3.0 V power supply is abnormal.

Impact on the System

If the alarm is reported, one of the two power inputs is faulty. As a result, the NE is affected.

Possible Causes

Possible causes of the POWER_ABNORMAL alarm are as follows:

  • The power input port is loose, or has been disconnected.

  • The power board is faulty.


  1. Check whether the power cable is connected correctly to the power input port. If the cable is not connected or is loose, connect it correctly.
  2. View alarms on the U2000 to check whether the POWER_ABNORMAL alarm is cleared.

    If... Then...
    The alarm is cleared No further action is required.
    The alarm persists Go to the next step.

  3. Replace the NE subrack.

    Replacing the power module or the subrack of the NE requires power—off of the NE. This operation will interrupt the services on the NE. Hence, this operation is of risk.

Related Information


Updated: 2019-01-21

Document ID: EDOC1100020975

Views: 83166

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