MERLIN LEGEND Communications System Release 6.1
System Programming Guide
555-661-111
Issue 1
August 1998
Glossary
Page GL-20
O
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
extension
In a system that is part of a
private network
, an extension
that is in the
non-local dial plan
.
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)
out-of-band
signaling
Signaling that uses the same path as voice-frequency
transmission and in which the signaling is outside the band
used for voice frequencies.
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