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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).
OTUk_DEG

OTUk_DEG

Description

The OTUk_DEG alarm indicates that an OTUk signal is degraded. This alarm is generated if signal degradation occurs or the bit error count exceeds its threshold when BIP8 detection is in burst mode.

k indicates the level of rate, its value is 2 or 3.

Attribute

Alarm Severity Alarm Type

Minor

Communication alarm

Parameters

None

Impact on the System

If the alarm is generated, the services at the optical port have bit errors, which make the service signals invalid or even unavailable.

Possible Causes

  • Cause 1: The optical port at the local end is faulty.
  • Cause 2: The fiber on the transmission line is abnormal.
  • Cause 3: The board is faulty.

Procedure

  1. Cause 1: The optical port at the local end is faulty.
    1. Query the board that reports the alarm on the NMS.
    2. Check whether the input optical power of the board is within the permitted range. For board optical power indicators, see "Technical Specifications" in the Hardware Description. If the optical power is not within the permitted range, see IN_PWR_HIGH and IN_PWR_LOW for troubleshooting.
    3. Check whether the alarm is cleared. If the alarm persists, go to 2.
  2. Cause 2: The fiber on the transmission line is abnormal.
    1. Check whether the fiber meets the following requirements:

      • The bending radius is not less than 6 cm.
      • The optical interface connector is well inserted.
      • The fiber connector is clean.
      • The cable is intact.

      If the preceding requirements are not met, clean the fiber connector or replace the fiber. For details, see Cleaning the Optical Fiber Connector.

    2. Check whether the alarm is cleared. If the alarm persists, go to 3.
  3. Cause 3: The board is faulty.
    1. Replace the board that reports the alarm.
    2. Check whether the alarm is cleared. If the alarm persists, contact Huawei to handle the alarm.

Related Information

None

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Updated: 2019-01-21

Document ID: EDOC1100020975

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