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For the purposes of this guide, alarms, events, and traps are defined as follows:

  • alarms are events that are visible in the Alarm Dashboard

  • events are triggers that initiate and send an alarm and/or trap

  • traps are alerts that are created in and are sent by SNMP

 

Events are classified according to the following types:

  • critical alarms

  • major alarms

  • minor alarms

  • warning events

  • clearing events

Reported events and alarms that can be enabled to appear in the Alarm Dashboard all have associated clearing events. A clearing event causes the dashboard to delete the associated critical, major, minor, and warning alarm from the Alarm Dashboard panel and reduces the alarm count for the corresponding severity type.

Clearing events never appear in the dashboard and do not increment the count of a severity type.

Note

Some critical, major, minor, and warning alarms that are stateless and informative only never appear in the dashboard and do not increment the severity based counters.

The following table defines event types used by the Sonus Signaling System and identifies the event types that appear in the Alarm Dashboard.

Table : Event Types and Severity Levels

Event Type Description Appears in Dashboard
Critical

The critical event severity level indicates that a service affecting condition has occurred and an immediate corrective action is required. Such a severity can be reported, for example, when an application becomes totally out of service and its capability must be restored. For example:

  • A total system failure that results in loss of all transaction processing capability such as call processing or data transmission.
  • The reduction in capacity or traffic handling capability such that the system cannot handle expected loads.
  • Any loss of safety or emergency capability such as not being able to complete 911 or E911 calls.
  • The inability of the system to perform automatic system reconfiguration.
  • The inability to restart a processor or the system.

 

Yes
Major

The major event severity level indicates that a service affecting condition has developed and an urgent correction action is required. Such a severity can be reported, for example, when there is a severe degradation in the capability of the application and its full capability must be restored. For example,

  • The loss of billing capability.
  • The corruption of billing system databases that requires service affecting corrective actions.
  • The loss of access for maintenance or recovery operations.
  • The inability to provide any required critical or major trouble notification.
Yes
Minor The minor event severity level indicates the existence of a non-service affecting fault condition and that corrective action should be taken to prevent a more serious fault. Such a severity can be reported, for example, when the detected alarm condition is not currently degrading the capacity of the system. Yes
Warning The warning event severity level indicates the detection of a potential or impending service affecting fault, before any significant effects have been registered. Action should be taken to further diagnose (if necessary) and correct the problem in order to prevent it from becoming a more serious service affecting fault. Yes
Clearing

The clearing event severity level indicates the clearing of previously reported alarms. All critical, major, minor, and warning alarms require a corresponding clearing notification. Not all warnings have an associated clearing event.

When the Alarm Dashboard receives a clearing event, the alarm associated to the clearing event is removed from the Alarm Dashboard.

 

No

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