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OSN 500 550 580 V100R008C50 Alarms and Performance Events Reference 02

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ODUk_TCMn_BDI

ODUk_TCMn_BDI

Description

ODUk TCMn backward defect indication. This alarm is generated when five consecutive BDI bytes in the TCMn overhead field are "1".

  • k indicates the level of rate, its value is 0, 1, or 2.
  • n indicates the level of TCM, its value ranges from 1 to 6.

Attribute

Alarm Severity Alarm Type

Warning

Communication alarm

Parameters

None

Impact on the System

If the alarm is generated, bit errors occur at the downstream station.

Possible Causes

  • Signals input from the client side contain the ODUk_TCMn_BDI signal.

  • The corresponding OTU board at the downstream station receives the ODUk_LOFLOM, ODUk_TCMn_AIS, ODUk_TCMn_LCK, ODUk_TCMn_LTC, ODUk_TCMn_OCI, or ODUk_TCMn_SSF alarm.

Procedure

  1. On the NMS, query whether there is any OTUk-level alarm on the board. If there is, handle the alarm.
  2. Check whether the corresponding OTU board at the downstream station receives the ODUk_LOFLOM, ODUk_TCMn_AIS, ODUk_TCMn_LCK, ODUk_TCMn_LTC, ODUk_TCMn_OCI, or ODUk_TCMn_SSF alarm on the NMS. If it does, handle the corresponding alarm at the downstream station.
  3. If the alarm persists, contact Huawei technical support engineers to handle the alarm.

Related Information

None

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Updated: 2019-01-21

Document ID: EDOC1100020975

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