This operation allows an NMS to request all of the active alarms and TCAs for the EMS itself that are not acknowledged. Some alarms may be filtered out (excluded) by specifying their severities.

The result of this operation is independent of the filtering set up by the NMS for the notifications. Alarms which ASAP assigned severity is "NOT_ALARMED" should not be reported by this operation.

Operation Exceptions:
1. NOT_IMPLEMENTED - Raised when the EMS does not support this operation.
2. INTERNAL_ERROR - Raised in case of non-specific EMS internal failure.
