IN this case we should to configure alarm masking as following :
Procedure
- Log in to DeviceManager.
- Choose
Settings >
Alarm Settings. - In the left navigation tree, select the Alarm Masking node.
- View all of the alarms in the system. Table 5-24 describes the related parameters.Figure 1 Alarm masking management dialog box

Table 1 Alarm masking parameters Parameter
Description
Name
Indicates the name of an alarm.
Alarm ID
Indicates the alarm ID.
Alarm Type
Indicates the system type of an alarm.
Level
Indicates the severity of an alarm. The possible values are Critical, Major, Warning, and Info.
Alarm Masking
Enables or disables alarm masking.
Unhandled Alarms
Indicates whether alarms are cleared in the system or not.


