AT&T System 85 - Manual (Page 135)

CHAPTER 9. GLOSSARY
Direct Extension Selection (DXS)
An option on an attendant console that allows an attendant direct
tlephone/voice terminal (inside the system) by pressing a hundreds group
tens and units button.
Distributed Communication System (DCS)
access to an idle
select button and a
A number of systems connected together in a network configuration to serve a customer
with a large number of lines. Systems can be in the same equipment room, in a campus
arrangement separated by short distances or scattered around a metropolitan area.
Attendant and telephone/voice terminal features can be used across tie trunks and data links
to allow the multisystem to appear as one system.
Electronic Tandem Networking (ETN)
A private telecommunications network in which calls are automatically switched over specific
tie trunks.
Facilities Restriction Levels (FRLs)
An assigned number that determines both the types of calls that can be made and the types
of facilities (trunks) that can be used.
Feature
An application or service provided by the system.
Feature Button
A labeled button designating a specific feature.
Foreign Exchange (FX) Trunk
A telecommunications channel that connects a private telephone system to a CO other than
its own.
Idle Loop
An inactive appearance on the attendant console.
Individual Page Number
A number that identifies a person who receives a radio page.
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