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OSN 500 550 580 V100R008C50 Alarms and Performance Events Reference 02

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The RTC_FAIL alarm indicates a real-time clock (RTC) failure on the system control, switching, and timing board. This alarm occurs when the clock of the system control, switching, and timing board is faulty.


Alarm Severity Alarm Type


Equipment alarm



Impact on the System

When this alarm occurs, the time stamp precision of the system decreases, resulting in service interruptions.

Possible Causes

The possible cause of the RTC_FAIL alarm is as follows:

  • The board temperature is high.
  • The RTC chip of the system control, switching, and timing board is damaged.


  1. Lower the board temperature. Check whether the alarm is cleared.

    If... Then...

    The alarm persists

    Go to the next step.

    The alarm is cleared

    No further action is required.

  2. Replace the system control, switching, and timing board of the corresponding equipment.

Related Information


Updated: 2019-01-21

Document ID: EDOC1100020975

Views: 75150

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