Message-Waiting Indicator; Additional Telephone Adjuncts; Data Communications Adjuncts - AT&T MERLIN LEGEND Release 3.1 System Manager's Manual

Adjuncts
Amplified Speech Handset. Amplifies the voice of the other party;
provides 0 dB to 10 dB (nominal) voice gain.
Push-to-Talk Handset. Activates the mouthpiece only when you push
the button on the handset.

Message-Waiting Indicator

You can connect the Z34A message-waiting indicator to single-line telephones
that do not have Message lights.

Additional Telephone Adjuncts

You can also connect answering machines and credit card verification terminals
to telephones.

Data Communications Adjuncts

You can use a variety of data communications equipment (DCEs) with the
system. This equipment connects to analog, T/R (tip/ring), or MLX extension
jacks and to analog or digital lines/trunks. Data terminal equipment (DTE), such
as a PC or videoconferencing system, connects to the DCE. Generally, dialing is
performed at the DTE keyboard, although some configurations use a telephone
or data module for dialing. When a telephone is included in your data setup, you
usually use an MFM or GPA as well.
NOTE:
For the most up-to-date information about data and video communications,
consult the Data/Video Reference .
The system works with a variety of modems for data communications use within
the system over analog system lines, or over analog lines/trunks, such as
standard loop-start or ground-start lines/trunks. A modem can connect an MLX
telephone (with an MFM installed) The modem serves a data terminal (such as a
PC or printer) and connects to the system through an MLX extension jack. A
GPA allows connection of a modem to an analog extension jack and analog
multiline telephone. A modem can also connect to a T/R extension jack on an
008, 012, or 016 (Release 4.0 and later) module for use with data terminals that
do not share an extension with a telephone.
The DCE described below is a terminal adapter. An ISDN terminal adapter is
designed for digital communications within the system or over NI-1 BRI
(National Integrated Services Digital Network Basic Rate Interface), PRI (Primary
Rate Interface), or T1 Switched 56 facilities. A terminal adapter serves the same
purpose as modems do but facilitate high-speed digital communications.
Terminal adapters always connect to the system through MLX extension jacks.
System Components
3–39