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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).
T_LOS

T_LOS

Description

The T_LOS alarm indicates that no signal is input on the transmit side of the line board.

Attribute

Alarm Severity Alarm Type

Major

Communication alarm

Parameters

None.

Impact on the System

When the T_LOS alarm occurs, there is no signal input on the transmit side of the line board. As a result, the services transmitted from the optical interface are unavailable.

Possible Causes

Possible causes of the T_LOS alarm are as follows:

  • The services are incorrectly configured.

  • The line board is faulty.
  • The cross-connect board is faulty.

Procedure

  1. Check whether the services to be transmitted from this optical interface on the line board are configured. If the services to be transmitted are configured, go to step 3.
  2. Configure the services to be transmitted from the line board again. View alarms on the NMS to check whether the T_LOS alarm is cleared.

    If... Then...

    The alarm is cleared

    No further action is required.

    The alarm persists

    Go to the next step.

  3. If the line board is faulty, reset the board.
  4. View alarms on the NMS to check whether the T_LOS alarm is cleared.

    If... Then...

    The alarm is cleared

    No further action is required.

    The alarm persists

    Go to the next step.

  5. If the cross-connect board is faulty, replace the system control, switching, and timing board.

Related Information

None.

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Updated: 2019-01-21

Document ID: EDOC1100020975

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