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Issue 5 January 1998 GL-1555-230-024
GLGlossary and Abbreviations
Numerics
3B2 Message Server
A software application that combines voice and data messaging services for voice-terminal users
whose extensions are connected to a system.
800 service
A service in the United States that allows incoming calls from certain areas to an assigned
number for a flat-rate charge based on usage.
A
AA
Archangel. See angel.
AAC
ATM access concentrator
AAR
See Automatic Alternate Routing (AAR).
abandoned call
An incoming call in which the caller hangs up before the call is answered.
Abbreviated Dialing (AD)
A feature that allows callers to place calls by dialing just one or two digits.
AC
1. Alternating current.
2. See Administered Connection (AC).
AAR
Automatic Alternate Routing
ACA
See Automatic Circuit Assurance (ACA).
ACB
See Automatic Callback (ACB).
ACD
See Automatic Call Distribution (ACD).
ACD agent
See agent.
ACU
See Automatic calling unit (ACU)
ACW
See after-call work (ACW) mode.