AT&T MERLIN LEGEND Release 3.1 System Programming Manual page 865

Glossary
MLX-20L telephone
MLX-28D telephone
mode codes
modem
modem pool
module
Multi-Function
Module
multiline telephone
multiplexing
Music On Hold
GL–18
System Programming
20-line button digital telephone with a 7-line by
24-character display.
28-line button digital telephone with a 2-line by
24-character display.
Streams of touch-tone codes used by voice messaging
applications to communicate with the system's control unit.
Device that converts digital data signals to analog signals
for transmission over a telephone line, and analog signals
received on a telephone line to digital signals.
Pair, or group of pairs, of modems and data modules with
interconnected RS-232 interfaces that converts digital
signals to analog, or analog signals to digital, thereby
allowing users with digital data stations to communicate
with users who have analog data stations.
Circuit pack in the control unit that provides the physical
jacks for connection of telephones and/or outside trunks to
the communications system. In the name of a module, the
first digit indicates the number of line/trunk jacks it
contains; the last digit indicates the number of extension
jacks it contains. If no letters appear after the number, a
line/trunk module provides loop-start trunks or an extension
jack module provides analog or tip/ring jacks. For example,
a 408 GS/LS MLX module contains four line/trunk jacks and
eight digital (MLX) extension jacks, provides either loop-
start (LS) or ground-start (GS) trunks.
See MFM .
An analog or digital (MLX) telephone that provides multiple
line buttons for making or receiving calls or programming
features.
The division of a transmission channel into two or more
independent channels, either by splitting the frequency
band into a number of narrower bands or by dividing the
channel into successive time slots.
Customer-provided music source or Magic on Hold
connected to the system through a loop-start jack.