Lucent Technologies LambdaUnite Installation Manual page 318

AC
Alternating Current
ACO (Alarm Cut-Off)
A button on the user panel used to silence audible alarms.
ACT (Active)
Used to indicate that a circuit pack or module is in-service and currently providing service
functions.
Adaptive-rate tributary operation of a port (Pipe mode)
Mode of operation of a port in which tributaries are not explicitly provisioned for the expected
signal rates. The signal rates are automatically identified.
ADM (Add/Drop Multiplexer)
The term for a synchronous network element capable of combining signals of different rates and
having those signals added to or dropped from the stream.
AEL
Accessible Emission Limits
Agent
Performs operations on managed objects and issues events on behalf of these managed objects.
All SDH managed objects will support at least an agent. Control of distant agents is possible
via local "Managers".
AGNE
Alarm Gateway Network Element
AID (Access Identifier)
A technical specification for explicitly naming entities (both physical and logical) of an NE
using a grammar comprised of ASCII text, keywords, and grammar rules.
AIS (Alarm Indication Signal)
A code transmitted downstream in a digital network that indicates that an upstream failure has
been detected and alarmed if the upstream alarm has not been suppressed.
AITS
Acknowledged Information Transfer Service: Confirmed mode of operation of the LAPD
protocol.
Alarm
Visible or audible signal indicating that an equipment failure or significant event/condition has
occurred.
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G L O S S A R Y
G L - 2
Lucent Technologies 365-374-059
Issue a, January 2002