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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).
MSSES

MSSES

Performance Event Meaning

The MSSES event indicates that severely errored seconds occur in the MS.

Performance Event Attributes

Performance Event ID Performance Event Type

0x12

SDH performance event

Impact on the System

If bit errors occur in the services, identify the causes and rectify the fault immediately. Otherwise, alarms will be generated and the signal transmission quality will be affected. If bit errors exceed the B2 bit error threshold-crossing threshold and degrade threshold, the B2_EXC and B2_SD alarms will be generated.

Possible Causes

The MSSES event occurs when one of the following requirements is met: 1. Not less than 30% bit errors are detected in one second. 2. At least one severely disturbed period (SDP) occurs. The SDP indicates that the BER of all the consecutive blocks is not lower than 10-2 or the LOS, LOF and MS_AIS alarms occur in a period of at least four consecutive blocks or 1 ms (the longer one is selected).

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

B2_EXC

B2 bit errors crossing the threshold

B2_SD

Signals degraded (B2)

R_LOS

The signal on the receiver line side is lost.

R_LOF

The out-of-frame fault occurs on the receiver line side.

MS_AIS

Multiplex section alarm indication

Procedure

  1. See MSES, B2_EXC, B2_SD, R_LOS, R_LOF, or MS_AIS.

Reference

None.

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Updated: 2019-01-21

Document ID: EDOC1100020975

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