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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).
DOWN_E1_AIS

DOWN_E1_AIS

Description

The DOWN_E1_AIS alarm is an indication alarm of downstream 2 Mbit/s signals. This alarm is generated when the tributary board detects that the values of downstream E1 signals are all 1.

Attribute

Alarm Severity Alarm Type

Minor

Communication 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

This parameter is ineffective. It has a fixed value of 0x01.

Parameter 2, Parameter 3

Indicates the path ID.

Impact on the System

E1 signals in the path are unavailable.

Possible Causes

Possible causes of this alarm are as follows:

  • The local end reports a high-level alarm, such as R_LOS, R_LOC, R_LOF, or MS_AIS.
  • The opposite end reports the UP_E1_AIS or T_ALOS alarm.
  • The tributary board at the local end is faulty.
  • The system control and cross-connect units at the local end are faulty.

Procedure

  1. On the U2000, check whether the local end reports the R_LOS, R_LOC, R_LOF, or MS_AIS alarm.

    If... Then...

    The local end reports the R_LOS, R_LOC, R_LOF, or MS_AIS alarm

    Clear the R_LOS, R_LOC, R_LOF, or MS_AIS alarm. Then, check whether the DOWN_E1_AIS alarm is cleared. If the DOWN_E1_AIS alarm persists, go to the next step.

    The local end does not report the R_LOS, R_LOC, R_LOF, or MS_AIS alarm

    Go to the next step.

  2. On the U2000, check whether the opposite end reports the UP_E1_AIS or T_ALOS alarm.

    If... Then...
    The opposite end reports the UP_E1_AIS or T_ALOS alarm Clear the UP_E1_AIS or T_ALOS alarm. Then, check whether the DOWN_E1_AIS alarm is cleared. If the DOWN_E1_AIS alarm persists, go to the next step.
    The opposite end does not report the UP_E1_AIS or T_ALOS alarm Go to the next step.

  3. Check whether the tributary board at the local end is faulty.

    If... Then...
    The tributary board is faulty

    Replace the tributary board. Then, check whether the alarm is cleared. If the alarm persists, go to the next step.

    The tributary board is functioning properly Go to the next step.

  4. Check whether the system control and cross-connect units at the local end are faulty.

    If... Then...
    The system control and cross-connect units are faulty

    Replace the system control, cross-connect, and timing board. Then, check whether the alarm is cleared. If the alarm persists, go to the next step.

    The system control and cross-connect units are functioning properly

    Contact Huawei technical support engineers to handle the alarm.

Related Information

None.

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Updated: 2019-01-21

Document ID: EDOC1100020975

Views: 75104

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