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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_LOM

OTUk_LOM

Description

The OTUK_LOM alarm indicates that the multiframe alignment signal (MFAS) is abnormal. This alarm is reported if out of multiframe (OOM) state lasts for three consecutive milliseconds during multiframe alignment processing.

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

Attribute

Alarm Severity Alarm Type

Major

Communication alarm

Parameters

None

Impact on the System

Service quality is affected.

Possible Causes

  • Cause 1: The FEC type is inconsistently configured at both ends.

    The following figure shows details.

  • Cause 2: The signals received by the local universal line board contain too many bit errors.
  • Cause 3: The local board is faulty.

Procedure

  1. Cause 1: The FEC type is inconsistently configured at both ends.
    1. Check whether the FEC type is consistently configured on interconnected boards. If the configurations are inconsistent, rectify the configurations.
    2. If the alarm persists, go to Cause 2.
  2. Cause 2: The signals received by the local universal line board contain too many bit errors.
    1. On the NMS, query the performance value of BIP8 errors in signals received by the local board. If too many BIP8 errors exist, refer to the handling method of the OTUk_DEG alarm.
    2. If the alarm persists, go to Cause 3.
  3. Cause 3: The local board is faulty.
    1. The board that reports the OTUK_LOM alarm is faulty.

      If...

      Then...

      The board supports pluggable optical modules

      Replace pluggable optical modules. For details, see Replacing the Optical Module. If the alarm persists, replace the faulty board.

      The board does not support pluggable optical modules

      Reset the board. For details, see Resetting Boards.

      If the alarm persists, replace the faulty board.

    2. If the alarm persists, contact Huawei technical support personnel to handle the alarm.

Related Information

None

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Updated: 2019-01-21

Document ID: EDOC1100020975

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