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Equipment
Controller
Expansion
carrier
Expansion
processor
module
Extension jack
Extension
jack number
400 Module
Line jack
Line jack
number
Network
interface jack
Premises
equipment
Primary carrier
The AT&T product that you purchased as part of your
system. This product consists of a group of modules that
connect Centrex lines coming into your building to the
extensions in your system. The equipment controller also
provides equipment features.
The optional component of the AT&T equipment controller
that can be connected to the primary carrier to expand your
system’s line and extension capacity. See also Primary
carrier.
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.
The location on 206 modules that allows you to connect
phones (or other telecommunications devices) to the
equipment controller.
The number assigned to each extension jack on a 206
module. Extension jack numbers run consecutively from 10
through 33 (for a two-carrier configuration).
The AT&T equipment component that contains jacks for
connecting up to four Centrex lines to the equipment
controller.
The location on 206 and 400 modules that allows you to
connect Centrex lines to the equipment controller.
The number assigned to each line jack on a 206 or 400
module. Line jack numbers run consecutively from 01
through 24 (for a two-carrier configuration).
A jack, generally located in your equipment room, that
provides access to a Centrex line coming into your building
from your local telephone company. A telephone cord from
the network interface jack to a line jack on a 206 or 400
module connects the Centrex line to your system.
The AT&T equipment controller and MLS- and MLC-model
telephones that you purchased as part of your system, plus
all other telecommunications devices that are connected to
your equipment controller. For purposes of this guide,
premises equipment does not include any equipment that
connects directly to Centrex lines without going through the
equipment controller.
The required component of the AT&T equipment controller
that contains the primary processor module and up to two
206 and two 400 modules. This provides for connection of
up to 12 lines and 12 extensions. See also Expansion carrier.
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Installing the Equipment