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OSN 500 550 580 V100R008C50 Alarms and Performance Events Reference 02

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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).
RSOOF

RSOOF

Performance Event Meaning

The RSOOF event indicates the regenerator section out-of-frame count.

Performance Event Attributes

Performance Event ID Performance Event Type

0x04

SDH performance event

Impact on the System

This performance event indicates that the frame headers cannot be identified in five or more consecutive frames in the received signals of the line board. The board changes to the out-of-frame state. As a result, the services are unavailable.

If the out-of-frame state lasts for three milliseconds, the loss-of-frame state is entered. The equipment generates the R_LOF alarm indicating the loss of frame.

Possible Causes

When a frame cannot receive the correct A1 or A2 byte, the frame header cannot be distinguished in several consecutive frames. In this case, the receive end changes to the out-of-frame counting state.

External causes:

  • The fiber performance is degraded, and the fiber has high attenuation.

  • The fiber connector is dirty or incorrect.

  • The equipment is poorly grounded.

  • There is a severe interference source around the equipment.

  • 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 is excessive, the transmit circuit at the opposite end is faulty, or the receive circuit at the local end is faulty.

  • The synchronization performance of the clock is poor.

  • The cross-connect unit and the line board poorly match.

  • The board becomes faulty, or the performance of the board is degraded.

Relevant Alarms

Alarm Name Correlation

R_OOF

Receive out of frame

R_LOF

Receive loss of frame

RS_CROSSTR

Regenerator section performance parameter override alarm

Procedure

  1. Add an attenuator if the received optical power is overloaded.
  2. Check the fiber and optical connector. Clean the fiber connector.
  3. Replace the board.

Reference

None.

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Updated: 2019-01-21

Document ID: EDOC1100020975

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