Alarm type, Severity and Category

    2. Event alarm: It only indicates the system is in alarm state at a certain time. There is no cleared alarm for event         alarms.

Alarm Severity 
    1. Critical alarm, this box is filled with red color
    2. Major alarm, this box is filled with orange color
    3. Minor alarm, this box is filled with yellow color
    4. Warning alarm, this box is filled with blue color

FIGURE: Number of alarms of each severity

Alarm Category 
    1. Power alarm 
    2. Environment alarm 
    3. Signaling alarm 
    4. Trunk alarm 
    5. Hardware alarm 
    6. Software alarm 
    7. Running alarm
    8. Communication alarm 
    9. Quality of Service (QoS) alarm 
    10. Error alarm