AT&T MERLIN LEGEND Release 2.0 Equipment And Operations Manual page 35

Introduction
1. Control Unit. The backbone of the system, consisting of the basic and
expansion carriers, power supply module, processor module, and
line/trunk and station modules. The control unit connects telephone
company lines/trunks with stations such as telephones and adjuncts.
Line/Trunk and Station Modules. The components that connect
2.
telephone company lines/trunks and terminal equipment such as
telephones, external alerts, and fax machines via jacks to the control unit.
3. Carrier (Basic). The component attached to the backboard used to hold
the modules needed for system operation. The basic carrier houses the
processor module, power supply module, and up to five line/trunk and
station modules. Each expansion carrier houses its own power supply
and up to six additional line/trunk and/or station modules. One or two
expansion carriers can be added.
4. Processor Module. A miniature computer that controls most of the
system's features, and supplies the system's diagnostics. The processor
provides two jacks, one for Station Message Detail Recording (SMDR)
and the other for system programming and maintenance via a personal
computer (PC).
Power Supply Module. The component that supplies DC power for the
5.
modules and telephones (one power supply unit is needed per carrier).
If the system's power requirements exceed the capacity of the power
supply, an auxiliary power supply unit can be added.
6. Direct Station Selector (DSS). A console that adds 50 buttons for one-
touch extension dialing to the MLX-20L or MLX-28D telephone and
speeds call handling.
7. Analog Data Station. A data terminal such as a PC, printer, or optical
reader that connects, via a modem (for transmitting and receiving analog
signals), to a 012 basic telephone module or a 008 off-premises
telephone (OPT) module. A data terminal can also be connected to an
MLX telephone using an MFM or to an analog multiline telephone using a
GPA.
Magic On Hold®.
8.
through a ground-start/loop-start (GS/LS) jack programmed for Music-
on-Hold. (A customer-provided music source can be connected instead
of Magic On Hold.)
9. General Purpose Adapter (GPA). An adapter used to connect a variety
of tip/ring (T/R) adjuncts to an analog multiline telephone (shown here
with an answering machine).
10. Analog Multiline Telephone. A 34-button telephone with built-in
speakerphone that connects to the system via an analog station jack.
Other analog multiline telephones compatible with the system include the
22- and 34-button with built-in speakerphone and a l-line, 16-character
display, and the 10- and 22-button with built-in speakerphone, without
display. In addition, the following vintage membrane telephones (no
Optional equipment that connects to the system
Components 1-7