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OSN 500 550 580 V100R008C50 Alarms and Performance Events Reference 02

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T_LOC

T_LOC

Description

The T_LOC alarm indicates that the clock of the signal in the transmit direction of the line board is lost.

Attribute

Alarm Severity Alarm Type

Major

Equipment alarm

Parameters

When you view an alarm on the network management system, select the alarm. In the Alarm Details field display the related parameters of the alarm. The alarm parameters are in the following format: Alarm Parameters (hex): parameter1 parameter2...parameterN. For details about each parameter, refer to the following table.

Name Meaning

Parameter 1

Indicates the actual number of the optical interface on a board where the alarm occurs.

For example, 0x01 indicates that the alarm is reported from optical interface 1 of the board.

Parameter 2, parameter 3

Indicates the actual number of the optical interface on a board where the alarm occurs.

For example, 0x01 indicates that the alarm is reported from optical interface 1 of the board.

Impact on the System

When the T_LOC alarm occurs, the clock of the signal on the transmit side of the line board is lost. As a result, the services transmitted from the optical interface are unavailable.

Possible Causes

Possible causes of the T_LOC alarm are as follows:

  • The cross-connect board is faulty.

  • The clock board is faulty.
  • The line board is faulty.

Procedure

  1. If the line board is faulty, replace it.

    If the line board is not configured with automatic protection switching, replacing the optical module of the line board, and performing a cold reset on the line board or replacing this line board may cause the service interruption. This operation is of risk.

Related Information

None.

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Updated: 2019-01-21

Document ID: EDOC1100020975

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