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OSN 500 550 580 V100R008C50 Alarms and Performance Events Reference 02

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The BCV event indicates the pump laser back facet current. It includes:

  • BCVMAX: stands for the maximum value during a period of time.
  • BCVMIN: stands for the minimum value during a period of time.
  • BCVCUR: stands for the current value.


Performance Event ID Performance Event Type

BCVMAX: 0x76

Equipment function

BCVMIN: 0x77

BCVCUR: 0x78

Impact on the System


Possible Causes

Back facet current is current O/E converted from part of light reflected from the resonant cavity of a laser. The back facet current reflects the laser output optical power value. If the BCVCUR is 0, the laser is faulty. When this occurs, replace the board where this faulty laser resides.

Related Alarms



  1. None.

Related Information


Updated: 2019-01-21

Document ID: EDOC1100020975

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