Caller ID Inspect
A feature that allows you to view incoming Caller ID information on other lines while active on a call, without placing the call on hold or hanging up.
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, which 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.
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.
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
An AT&T 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
DXD
See Direct Extension Dialing.
E
Emergency Telephone
A standard phone that is programmed to dial a predetermined outside number when a user lifts the handset.
Expansion carrier
The optional component of the control unit that can be connected to the primary carrier to expand your system’s line and extension capacity. See also Primary carrier.
Expansion processor module
The main module of the expansion carrier, which must be installed in the center slot of the expansion carrier. This AT&T module extends the primary carrier’s management capabilities to the 206 and 400 modules installed in the expansion carrier. See also Primary processor module.
Extension
An endpoint in the system (numbered
Extension jack
The location on 206 modules that allows you to connect extension wiring to the control unit for phones (or other telecommunications devices).
