AT&T MERLIN LEGEND Release 3.1 System Manager's Manual page 402

Glossary
module
Multi-Function
Module
multiline telephone
multiplexing
Music On Hold
N
network
network interface
NI-1 BRI
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,
and 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.
Configuration of communications devices and software
connected for information interchange.
Hardware, software, or both that links two systems in an
interconnected group of systems, for example, between
the local telephone company and a PBX.
(National Integrated Services Digital Network 1 Basic Rate
Interface) A type of digital facility that carries the
equivalent of three lines. Two are called B-channels and
provide voice and data communications services. A third
D-channel controls signaling and maintains operations on
the B-channels.
System Manager's Guide
GL–15