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OSN 500 550 580 V100R008C50 Alarms and Performance Events Reference 02

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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
EXT_TIME_LOC

EXT_TIME_LOC

Description

The EXT_TIME_LOC alarm indicates that the external time source is lost. This alarm is reported when the external time port is enabled but no external time signal is received.

Attribute

Alarm Severity Alarm Type

Major

Equipment alarm

Parameters

Name Meaning

Parameter 1

Indicates the alarm cause.

  • 0x01: Faults occur on the link set up at the external time port.
  • 0x02: The second value in the time of data (TOD) information does not change, the second pulse is unavailable, or the second pulse is deteriorated.
  • 0x03: Errors occur in the cyclic redundancy check (CRC) for the TOD information.

Impact on the System

The time of the local NE cannot be synchronized to the external time equipment that is connected to the enabled external time port.

Possible Causes

Possible causes of the EXT_TIME_LOC alarm are as follows:

  • The cable is not connected to the correct external time port.
  • Faults occur on the link set up at the external time port.
  • The connector wire sequences do not match at both ends of the cable.
  • Faults occur on the equipment that outputs the external time.

Procedure

  1. Check whether the cable is connected to the correct external time port.

    If... Then...
    The cable is not connected to the correct external time port Connect the cable to the correct external time port, and check whether the alarm is cleared. If the alarm persists, go to the next step.
    The cable is connected to the correct external time port Go to the next step.

  2. Check the link set up at the external time port.

    If... Then...
    The cable carrying the link is broken or aged Replace the cable, and check whether the alarm is cleared. If the alarm persists, go to the next step.
    No fault occurs on the link Go to the next step.

  3. Check the connector wire sequences at both ends of the cable.

    If... Then...
    The connector wire sequences do not match at both ends of the cable Replace the cable to ensure that the connector wire sequences match at both ends of the cable. Check whether the alarm is cleared.
    The connector wire sequences match at both ends of the cable Go to the next step.

  4. Check the equipment that outputs the external time.

    If... Then...
    Faults occur on the equipment Rectify the faults on the equipment, and check whether the alarm is cleared. If the alarm persists, go to the next step.
    No fault occurs on the equipment Contact Huawei technical support engineers to handle the alarm.

Related Information

None.

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Updated: 2019-01-21

Document ID: EDOC1100020975

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