ATT DEFINITY Communications System Generic 3 Instructions Manual

Glossary
Issue  3   March 1996GL-3 
Administered Connection (AC)
Administered Connection is a feature that allows the switch to automatically establish and main-
tain end-to-end connections between access endpoints (trunks) and/or data endpoints (data 
modules).
administration terminal
A terminal used to administer and  maintain a system. See also terminal.
Administration Without Hardware (AWOH)
Provides the ability to administer ports without the need for the associated terminals or other hard-
ware to...

Glossary
GL-4Issue  3   March 1996 
appearance
A software process that is associated with an extension and whose purpose is to supervise a call. 
Also called ‘‘call appearance,’’ ‘‘line appearance,’’ and ‘‘occurrence.’’
applications processor
A minicomputer used with several user-controlled applications such as traffic analysis and elec -
tronic documentation.
architecture
The organizational structure of a system, including hardware and/or software.
ASCII (American National Standard Code for Information...

Glossary
Issue  3   March 1996GL-5 
agent disconnects from an ACD call while in Auto-in Work Mode, then that agent immediately 
becomes available to receive another ACD c all. 
See Manual-In Work Mode for a contrast.
Automatic Alternate Routing
Automatic Call Distribution (ACD) split
Calls of a similar type are distributed among agents.
Automatic Route Selection
The software program that controls call routing over an ETN is called Automatic Alternate Routing 
(AAR). AAR not only determines the route for...

Glossary
GL-6Issue  3   March 1996 
barrier code
A security code used with the Remote Access feature to prevent unauthorized  a ccess to the sys-
tem.
baud
In telecommunications applications, a unit of transmission speed equal to the number of signal 
events per second. See also bit rate an d bits per second.
BCC
The Bearer Capability Class (BCC) identifies the type of a call, for example, voice and different 
types of data. Determination of BCC is based on the call originator’s characteristics for...

Glossary
Issue  3   March 1996GL-7 
business communications terminal (BCT)
An integrated digital data terminal used for business applications. A BCT can function via a d igital 
terminal data module (DTDM) or a processor d ata module (PDM) as a spec ial-purpose terminal 
for services provided by an applications processor (AP) or, as a terminal for data entry and 
retrieval.
BX.25
An AT&T version of the CCITT X.25 protocol for data communications. BX.25 adds a fourth level to 
the standard X.25 interface....

Glossary
GL-8Issue  3   March 1996 
call management system (CMS)
An application, running on an adjunct processor, that collects information from an Automatic Call 
Distribution (ACD) unit. CMS enables customers to monitor and manage telemarketing centers by 
generating reports on the status of agents, splits, trunks, trunk groups, vectors, and vector direc-
tory numbers (VDNs), and  enables customers to partially administer the ACD feature for a com-
munications system.
call reference value (CRV)
An...

Glossary
Issue  3   March 1996GL-9 
cause value
A Cause Value is returned in responses to re quests or in event reports when a denial occurs or an 
unexpected condition is encountered. ASAI cause values fall into two ‘‘coding standards’’: Cod-
ing Standard 0 inc ludes any cause values that are part of AT&T and CCITT ISDN specifications, 
and, Codin g standard 3 in clu des any other ASAI cause values. This document uses a notation for 
cause value where the coding standard for the cause is given first,...

Glossary
GL-10Issue  3   Marc h 1996 
Class of Service (COS)
A feature that uses a number (0 through 15) to specify if voice terminal users c an ac tivate the 
Automatic Callb ack, Call Forwarding(emAll Calls, Data Privacy, or Priority Calling features.
common control switching arrangement (CCSA)
A private telecommunications network using dedicated trunks and a shared switching center for 
interconnectin g company locations.
communications system
The software-controlled processor complex that interprets...

Glossary
Issue  3   March 1996GL-11 
critical reliability system
A system that has the following duplicated items: control carriers, tone-clo ck  circuit p a cks, expan-
sion interface (EI) circ uit packs, and cabling between port networks (PNs) and  c enter stage 
switc h (CSS)  in a CSS-c o nnected system. See also duplicated common control, duplicate pro-
cessor-only system, and  duplication.
D
data channel
A communications p ath between two points used to transmit digital signals.
data communications...

Glossary
GL-12Issue  3   Marc h 1996 
causes an automatic transfer of call-control signaling to the backup D-channel. When this hap-
pens, the b ackup becomes the primary D-channel, and when the previous primary is returned to 
service it becomes the backup D-channel.
DCS
See Distributed Communications System on page GL-13.
delay-dial trunk
A trunk that allows dialing directly into a communications system (em that is, the digits are 
re ceived as they are dialed.
denying a request
Denying a Request is...