DEFINITY ECS Release 8.2
Administrator’s Guide
555-233-506 Issue 1
April 2000
Glossary and abbreviations
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appearance
A software process that is associated with an extension and whose purpose is to supervise a ca ll. An extensi on
can have multiple appearances. Also called call appearance, line appearance, and occurrence. See also call
appearance.
application
An adjunct that requests and receives ASAI services or capabilities. One or more applications can reside on a
single adjunct. However, the switch cannot distinguish among several applications residing on the same
adjunct and treats the adjunct, and all resident applications, as a single application. The term s app licat ion a nd
adjunct are used interchangeably throughout this document.
applications processor
A micro-computer based, program controlled computer providing applicatio n ser vices for the DEFINITY
switch. The processor is used with several user-controlled applications such as traffic analysis and electronic
documentation.
application service element
See capability group.
architecture
The organizational structure of a system, including hardware and software.
ARS
See Automatic Route Selection (ARS).ASAI
See Adjunct-Switch Application Interface (ASAI)ASCII (American Standard Code for Information Interchange)
The standard code for representing characters in digital form. Each character is represented by an 8-bit code
(including parity bit).
association
A communication channel between adjunct and switch for messaging purposes. An active association is one
that applies to an existing call on the switch or to an extension on the call.
asynchronous data transmission
A method of transmitting data in which each character is preceded by a start bit and followed by a stop bit,
thus permitting data characters to be transmitted at irregular intervals. This typ e tra nsmissio n is ad vantageous
when transmission is not regular (characters typed at a keyboard). Also called async hronous transmission. See
also synchronous data transmission.
asynchronous data unit (ADU)
A device that allows direct connection between RS-232C equipment and a digital switch.
Asynchronous Transfer Mode (ATM)
A packet-like switching technology in which data is transmitted in fixed-size (53-byte) cells. ATM provides
high-speed access for data communication in LAN, campus, and WAN environments.
ATB
See All trunks busy (ATB). ATD
See Attention dial (ATD).attendant
A person at a console who provides personalized service for incoming callers and voice-services users by per-
forming switching and signaling operations. See also attendant console.