Authentication and Key Agreement

An alerting indication to a condition that may have immediate or potential negative impact on the state of the monitored network element (NE). [T1.226-1992]

A location that receives local and remote alarms.
Note: An alarm center is usually in a technical control facility.

An instantaneous occurrence that changes at least one of the attributes of the alarm status of an object. This status change may be persistent or temporary, thus allowing for surveillance, monitoring, and performance measurement functionality, etc. Alarm events may or may not generate alarm reports; they may trigger other events or may be triggered by one or more other events.… (Read More →)

1. A signal transmitted in lieu of the normal signal to maintain transmission continuity and to indicate to the receiving equipment that there is a transmission interruption located either at the equipment originating the AIS signal or upstream of that equipment. [T1.231-1997]
2. A signal transmitted in lieu of the normal signal to maintain transmission continuity and indicate to the… (Read More →)

A device that responds to a signal from an alarm sensor.
Note: Examples of alarm indicators include bells, lamps, horns, gongs, and buzzers.

1. In communications systems, any device that (a) can sense an abnormal condition within the system and provide a signal indicating the presence or nature of the abnormality to either a local or remote alarm indicator, and (b) may detect events ranging from a simple contact opening or closure to a time-phased automatic shutdown and restart cycle.
2. In a… (Read More →)

A set of attributes that describes the alarms currently defined for an object, for example, perceived severity, alarm state, etc. The alarm status of an object is a subset of the global status of that object. [T1.215-1990]

A set of functions that enables the monitoring or interrogation (or both) of the telecommunications network concerning alarm-related events or conditions. [T1.215-1994]

Asynchronous Layered Coding