No relevant resource is found in the selected language.

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies. Read our privacy policy>Search


To have a better experience, please upgrade your IE browser.


OSN 500 550 580 V100R008C50 Alarms and Performance Events Reference 02

Rate and give feedback:
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).


Performance Event Meaning

The LPFECSES event indicates the lower-order path far end consecutive severely 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 on a remote NE but no related alarms are reported on the remote NE, the system will not be affected. However, it is required to identify the causes and rectify the fault immediately. Otherwise, alarms will be generated and the signal transmission quality will be affected.

Possible Causes

When a consecutive LPFESES sequence is detected, the LPFECSES event occurs. When unavailable time comes or LPFESES is absent in one second, the LPFECSES sequence ends.

External causes:

  • On the opposite equipment, the fiber performance is degraded, and the fiber has high attenuation.

  • The fiber connector is dirty or incorrect at the opposite station.
  • The opposite equipment is poorly grounded.
  • There is a severe interference source around the equipment at the opposite station.
  • The working temperature is high or low, and the opposite equipment cannot tolerate such temperature.

Equipment problems:

  • The signal attenuation on the receive side of the line board at the opposite station is excessive, or the transmit circuit at the opposite station is faulty, or the receive circuit at the local station is faulty.

  • The synchronization performance of the clock is poor at the opposite station.
  • The cross-connect unit and the line board, or the cross-connect and the tributary board poorly match at the opposite station.
  • The tributary board of the opposite equipment is faulty.
  • The fan of the opposite equipment becomes faulty.
  • The board of the opposite equipment becomes faulty or the performance of the board is degraded.

Relevant Alarms

Alarm Name Correlation


Bit errors occur on the lower-order path at the remote end.


Lower-order path remote defect indication


  1. See LPFEES.



Updated: 2019-01-21

Document ID: EDOC1100020975

Views: 76338

Downloads: 138

Average rating:
This Document Applies to these Products
Related Documents
Related Version
Previous Next