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OSN 500 550 580 V100R008C50 Alarms and Performance Events Reference 02

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PRBS_LSS

PRBS_LSS

Description

The PRBS_LSS alarm indicates loss of the pseudo-random binary sequence (PRBS) signal. The alarm is generated when the board, on which the PRBS bit error test is performed, does not receive the PRBS signals from the local board.

Attribute

Alarm Severity Alarm Type
Minor Equipment alarm

Parameters

None

Impact on the System

The PRBS test services on the board are interrupted.

Possible Causes

  • Cause 1: The link is abnormal. Hence, the board, on which the PRBS bit error test is performed, does not receive the PRBS signals from the local board.
  • Cause 2: The board is faulty, or the line is degraded.

Procedure

  1. Perform a self-loop by connecting the transmit end to the receive end of the PRBS signals on the local board.
    • If the alarm is cleared, it indicates that the board is normal. See Step 2 to check the link.
    • If the alarm persists, it indicates that the board is faulty. Replace the board.
  2. Check the link and make sure that the link under the PRBS test is a loop. If the alarm persists, perform a loopback on each point of the link. Find out the abnormal point on the link, and repair or replace the link.

Related Information

None

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Updated: 2019-01-21

Document ID: EDOC1100020975

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