For the purposes of the present document, the terms given in
TR 21.905 and the following apply. A term defined in the present document takes precedence over the definition of the same term, if any, in
TR 21.905.
Alarm:
A management representation of a fault, an error or a failure that requires attention or reaction by an operator or some machine. Alarms have state.
Alarm identifying attributes:
A set of attributes (objectInstance, alarmType, probableCause and specificProblem, if present) that identify an alarm. ObjectInstance identifies the network resource ,while alarmType, probableCause and specificProblem (if present) identify the alarming condition.
Alarming condition:
Identifies the reason an alarm is raised. Identified by a combination of alarmType, probableCause and specificProblem (if present).
Error:
A state of the system different from the correct system state. An error may or may not lead to a service failure. An error has a begin and end time.
Event:
Anything that occurs at a certain point in time, for example a configuration change, a threshold crossing, a transition to an error state or a transition to a failure state. Events do not have states.
Failure:
A state of inability to deliver the correct service as defined by the service specification. A service failure is the result of an error. A failure has a begin and end time.
Fault:
The (hypothesized or adjudged) cause for an error or a failure (such as system malfunctions, a defect in system design, a defect in software, or external interference).
MonitoredEntity:
Any class that can have an alarmed state.
Root cause:
The primary fault (cause), if any, leading to one or multiple errors or failures.
Void.
For the purposes of the present document, the abbreviations given in
TR 21.905 and the following apply. An abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in
TR 21.905.
ADAC
Automatically Detected and Automatically Cleared
ADMC
Automatically Detected and Manually Cleared
CRUD
Create, Read, Update and Delete
FM
Fault Management
MnS
Management Service
NRM
Network Resource Model
SBMA
Service Based Management Architecture