Instruction manual

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 an
MLS-34D, MLS-18D, or MLS-12D 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
industry-standard devices or an industry-standard
device and an MLS- or MLC-model phone, but not
two MLS- or MLC-model 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 groups
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 two-way
conversation between the doorphone and the
phone that answers.
E
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 10–57) that
connects telephones or standard devices, which
can be dialed using the [
Intercom ] button. See also
Programming extension.
Extension jack
The location on 206 modules that allows you to
connect extension wiring to the control unit for
phones (or other telecommunications devices).
Extension number
The number assigned to each extension jack on a
206 module. Extension numbers run consecutively
from 10 through 57 (for a two-carrier configuration)
and are used for intercom calling.
Extension Programming
A method of Telephone Programming that lets users
program their own extensions from their MLS- or
MLC-model phones. See also Centralized
Telephone Programming.
F
Fax Management button
An MLS- or MLC-model phone button with lights
that is programmed with the extension number of a
fax machine. A user can monitor the lights next to
this button to determine when the fax machine is in
use, available, or not answering.
Feature phone
An industry-standard phone that includes
programmable buttons or other built-in features.
DXD
See Direct Extension Dialing.
GL-2
Glossary