Instruction manual

MERLIN LEGEND Communications System Release 5.0
Installation
555-650-140
Issue 1
June 1997
Glossary
Page GL-28
module Circuit pack in the control unit that provides the phys-
ical jacks for connection of telephones and/or out-
side lines/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 mod-
ule provides
loop-start trunks or an extension jack
module provides analog or
tip/ring jacks. For exam-
ple, 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. There are also modules for the proces-
sor and power supply.
Multi-Function
Module
See MFM
.
multiline telephone An analog or digital (MLX) telephone that provides
multiple line buttons for making or receiving calls or
programming features.
multiplexing 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.
Music On Hold Customer-provided music source or
Magic On Hold
connected to the system through a
loop-start jack.