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OSN 500 550 580 V100R008C50 Alarms and Performance Events Reference 02

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The LSR_BCM_ALM alarm indicates that the bias current of the laser crosses the thresholds.


Alarm Severity Alarm Type


Equipment alarm


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 port ID.

Impact on the System

When the LSR_BCM_ALM alarm occurs, the laser works improperly. If the working current crosses the upper threshold, the laser will be damaged. If the working current crosses the lower threshold, gain becomes insufficient. In both cases, services will be interrupted.

Possible Causes

Possible causes of the LSR_BCM_ALM alarm are as follows:

  • The laser is aging.

  • The laser is faulty.


  1. Determine the alarmed board according to the alarm information on the U2000.
  2. Replace the optical module. The LSR_BCM_ALM alarm is cleared.

Related Information


Updated: 2019-01-21

Document ID: EDOC1100020975

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