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Glossary
modem pool
module
Multi-Function
Module
multiline telephone
multiplexing
Music On Hold
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 7500B data stations to communicate
with users who have analog modem data stations.
Circuit pack in the control unit that provides the physical
jacks for connection of telephones and/or outside
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 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. There are also modules for the processor and
power supply.
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.
Maintenance and Troubleshooting GL-23