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OSN 500 550 580 V100R008C50 Alarms and Performance Events Reference 02

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Performance Event Meaning

The C3794_LES_SDH performance event indicates the C37.94 port line-side code violation errored second.

Performance Event Attributes

Performance Event ID Performance Event Type


SDH performance event

Impact on the System

If bit errors occur in the services, you need to find out the causes and troubleshoot the problem in time. Otherwise, alarms will be generated and the signal transmission quality will be affected.

Possible Causes

External causes:

  • The fiber performance is degraded, and the fiber has extremely high attenuation.
  • The fiber connector is dirty or incorrect.
  • The equipment is poorly grounded.
  • There is a strong interference source around the equipment.
  • The working temperature is extremely high or extremely low, and the opposite equipment cannot tolerate such temperature.

Equipment problems:

  • Wrong service code types are selected.
  • A board fails or its performance degrades.

Relevant Alarms



  1. Refer to the C3794_LCV_SDH.



Updated: 2019-01-21

Document ID: EDOC1100020975

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