20426 Abnormal External Digital Sensor

Description

This alarm is reported when the switch signals of the external digital sensor on the power distribution box or the environment monitoring device are abnormal.

Attribute

Alarm ID	Alarm Severity	Alarm Type
20426	Major	Fault

Parameters

ID	Name	Meaning
1	Subrack No.	The number of the subrack
2	Logical Slot No.	0=0(Powerbox Monitor0,2=2(Enviroment Monitor)
3	Sensor No.	The number of the sensor that resides in the board
4	Num Status	0=Restore,1=Alarm
5	Alarm Attribute	0=Normal, Alarms period are longer than the Transient Threshold. 1=Transient Count, The times and the period of the alarms whose periods are shorter than the Transient Threshold are summed up. If the sum result is longer than the Alarm Occurrence Period Threshold or Alarm Occurrence Times Threshold, an alarm so called Transient Count Alarm is triggered. Because Transient Count Alarm is based on accumulative result, the recovery of the alarm may occur at least one Summing Cycle later. The Summing Cycle can be query by MML "LST STATSLDWIN".

Impact on the System

The environment of the equipment room is abnormal, such as the door of the cabinet is open illegally, water penetrates the equipment room, the equipment room catches fire, or the smoke is thick. The abnormal environment of the equipment room has an impact on the normal running of the system.

System Actions

Whether the alarm persists or the alarm is cleared depends on the actual detection value of the external digital sensor.

Possible Causes

The door status switch of the cabinet, the water sensor, or the smoke sensor is triggered.

Procedure

Check whether the cabinet where the alarmed sensor is located is normal. Check whether the environment and state of the equipment room are normal. If there are any abnormalities, take corresponding measures. Then check whether the alarm is cleared.
Y => The alarm is cleared. The alarm handling is complete.

N => The alarm persists. Please contact Huawei Customer Service Center.