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

Reminder

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

upgrade

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).
B3_SD_VC4

B3_SD_VC4

Description

The B3_SD_VC4 alarm indicates that B3 bit errors in a VC-4 path cross the set deterioration threshold.

Attribute

Alarm Severity Alarm Type

Minor

Service quality alarm

Parameters

When you view an alarm on the network management system, select the alarm. In the Alarm Details field display the related parameters of the alarm. The alarm parameters are in the following format: Alarm Parameters (hex): parameter1 parameter2...parameterN. For details about each parameter, refer to the following table.

Name Meaning

Parameter 1

Indicates the optical interface number. The value is always 0x01.

Parameter 2, Parameter 3

Indicates the VC-4 path number that generates the alarm.

Impact on the System

If the alarm occurs, it indicates that bit errors occur in the path-level services.

Possible Causes

Possible causes of the B3_SD_VC4 alarm are as follows:

  • There are B1 or B2 bit errors.
  • The received signals are heavily attenuated.
  • The fiber head is dirty or an incorrect connector is used.
  • The transmit unit at the opposite end is faulty.
  • The receive unit at the local end is faulty.

Procedure

  1. Check whether B1 or B2 bit errors are present on the line board responsible for service access.

    If... Then...
    The B1_EXC, B1_SD, B2_EXC, or B2_SDalarm is reported Refer to the corresponding section in this document to clear the B1_EXC, B1_SD, B2_EXC, or B2_SD alarm.
    No B1_EXC, B1_SD, B2_EXC, or B2_SD is reported Go to the next step.

  2. Check whether the receive optical power is normal.

    If... Then...
    The optical power is lower than the lower threshold Check whether the fibers are functional, fiber connectors are clean, and transmit optical power of the opposite line board is normal.
    The optical power is normal Go to the next step.

  3. Check whether the working temperature is normal.

    If... Then...
    The working temperature is over high or over low In the case of over high working temperature, add a cooling device to the NE. In the case of the over low working temperature, add a heating device to the NE.
    The working temperature is normal Go to the next step.

  4. Check whether service configurations are correct. If the service configurations are incorrect, rectify the configurations. If the service configurations are correct, go to the next step
  5. Check for the B3_EXC_VC3 alarm on the U2000.

    If... Then...
    If the B3_EXC_VC3 alarm is cleared No further action is required.
    If theB3_EXC_VC3 alarm persists Go to the next step.

  6. Perform loopbacks at both the local and opposite ends to locate the faulty board.

    If... Then...
    The B3 bit error performance event is reported on the opposite board The transmit part of the opposite board is faulty. Replace the faulty board.
    The B3 bit error performance event is reported on the local board The receive part of the local board is faulty. Replace the faulty board.

Related Information

None.

Translation
Download
Updated: 2019-01-21

Document ID: EDOC1100020975

Views: 75875

Downloads: 138

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