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MERLIN LEGEND Communications System Release 6.1
Network Reference
555-661-150
Issue 1
August 1998
Glossary
Page GL-20
N
O
network Configuration of communications devices and software
connected for information interchange.
network interface Hardware, software, or both that links two systems in an
interconnected group of systems, for example, between the
local telephone company and a PBX.
NI-1 BRI (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.
non-local user In a
private network
, a user who is connected to another
system in the network and not to the local system.
non-local dial plan In a system that is part of a
private network
, a list of
extension ranges that the local system references in order
to route non-local
intersystem calls via UDP
.
non-satellite
system
In a
private network,
a
communications system
that is
directly connected to and located more than 200 miles from
the local system.
off-hook Telephone is said to be off-hook when the user has lifted
the handset, pressed the Speakerphone button to turn on
the speakerphone, or used a headset to connect to the
communications system or the telephone network.
off-premises
telephone
See
OPT
.
ones density Requirement for channelized
DS1
service to the public
network that eight consecutive zeros cannot occur in a
digital data stream.
on-hook Telephone is said to be on-hook when the handset is hung
up, the speakerphone is turned off, and the user is not
using a headset to connect to the communications system
or the telephone network.
OPT (off-premises telephone)
Single-line telephone
or other
tip/ring
device connected to the system via a 008 OPT
module in the control unit. Appears as an inside extension
to the system, but may be physically located away from the
system.
OPX (off-premises extension)