Glossary
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A
AC
Alternating Current
ACU
Alarm Collection Unit. Radio Relay circuit pack that collects of equipment alarms,
analogue measurements from internal monitoring points and calculation data.
ADM
Add-Drop Multiplexer
Administrative Unit (AU)
Carrier for TUs
Administrative-Unit Pointer (AU PTR)
Indicates the phase alignment of the VC-n with respect to the STM-N frame. The pointer
position is fixed with respect to the STM-N frame.
Administrator
Lucent NMS Administrator.
Agent
Performs operations on managed objects and issues events on behalf of these managed
objects. All SDH managed objects will support at least one agent. Control of distant
agents is possible via local “Managers”.
Alarm
The notification (audible or visual) of a significant event. See also Event.
Alarm Indication Signal (AIS)
Code transmitted downstream in a digital Network that shows that an upstream failure
has been detected and also alarmed if the upstream alarm has not been suppressed. Also
called to as All OneS.
Alarm Severity
An attribute that defines the priority of the alarm message. The way in which alarms are
processed depends on the severity.
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365-312-847R4.0
Issue 4, November 2006
Lucent Technologies - Proprietary
See notice on first page
GL-1