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OSN 500 550 580 V100R008C50 Alarms and Performance Events Reference 02

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The CESPW_OPPOSITE_ACFAULT is a defect indication in an attachment circuit. After detecting a fault in the attachment circuit, the opposite end sets bit L in the control byte to "1" and sends the control byte to the local end. After detecting bit L sent from the opposite end, the local end reports the CESPW_OPPOSITE_ACFAULT alarm.


The attachment circuit is the circuit connected to the UNI side of the NE at the opposite end.


Alarm Severity Alarm Type





Impact on the System

The services on the attachment circuit are interrupted at the opposite end.

Possible Causes

The possible cause of the CESPW_OPPOSITE_ACFAULT alarm is as follows:

The attachment circuit is fault at the opposite end and the LOS/LOF/AIS signal is generated.


  1. Check whether alarms such as R_LOS, R_LOF, MS_AIS, T_ALOS, UP_E1_AIS, LFA, or LMFA are reported on the NE at the opposite end.
    If... Then...

    Alarms such as R_LOS, R_LOF, MS_AIS, T_ALOS, UP_E1_AIS, LFA, or LMFA are reported

    Handle the alarms first. Check whether the CESPW_OPPOSITE_ACFAULT alarm is cleared. If the CESPW_OPPOSITE_ACFAULT alarm persists, go to the next step.

    Alarms such as R_LOS, R_LOF, MS_AIS, T_ALOS, UP_E1_AIS, LFA, or LMFA are not reported

    Contact Huawei technical support engineers to handle the CESPW_OPPOSITE_ACFAULT alarm.

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Updated: 2019-01-21

Document ID: EDOC1100020975

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