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Call Waiting
A feature that lets standard phone users receive
notification of a second incoming call when they are
busy on a call. The user can press the switchhook
to put the first call on hold and answer the second
call.
Caller ID
A feature that displays an incoming caller’s number
(or name) on a system display phone. To get Caller
ID, you must subscribe to the service (if it is
available) from your local phone company and
connect Caller ID lines to the appropriate system
modules.
Caller ID Inspect
A feature that allows you to view incoming Caller ID
or Call Coverage information on other lines while
active on a call, without placing the call on hold or
hanging up.
CO Line
See Line.
Combination extension
An extension that has two devices connected to it.
Combination extensions can connect two standard
devices or a standard device and a system phone,
but not two system phones.
Control unit
The control unit consists of a primary carrier, which
contains line and extension modules for connecting
lines coming into your building to the extensions in
your system. It also provides system features. The
control unit can be expanded to include an
expansion carrier for additional line and/or
extension capacity.
Caller ID Name/Number
A feature that allows you to toggle between a
caller’s Caller ID name and Caller ID number.
Caller ID service
A subscription service available from some local
telephone companies, providing the telephone
number and/or name of the caller on lines that have
the service.
Calling Group
A group of extensions that can be called
simultaneously by dialing a group calling code.
See also Hunt Group.
Calling restriction
A feature that lets you control telephone use at
specific extensions.
Carrier
Plastic housing, made up of a backplane and
cover, that holds system modules. Your
configuration consists of at least the primary carrier
and can be expanded to include the expansion
carrier.
Centralized Telephone Programming
A method of telephone programming that lets you
program individual extensions in the system from a
system display phone at extension 10 or extension
11. Centralized Telephone Programming is an
alternative to Extension Programming.
D
DGC Group
See Group Call Distribution and Hunt Group.
Direct Extension Dialing
A feature that enables outside callers to dial an
extension or Hunt Group directly, without waiting for
the receptionist to transfer the call.
Doorphone
A Lucent Technologies proprietary phone that can
be wall mounted outside your office or in a lobby to
allow visitors to alert any number of system
extensions by pressing a button. The doorphone
includes a speaker and microphone, to allow a
two-way conversation between the doorphone and
the phone that answers.
Do Not Disturb
A feature that prevents incoming calls from ringing
at an extension. See also Send All Calls.
DXD
See Direct Extension Dialing.
GL-2 Glossary