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DEFINITY Enterprise Communications Server Release 6
Installation and Test for Multi-Carrier Cabinets
555-230-112
Issue 5
May 1998
Glossary and Abbreviations
Page GL-35
N
N+1
Method of determining redundant backup requirements. Example: if four rectifier modules are
required for a DC-powered single-carrier cabinet, a fifth rectifier module is installed for backup.
N x DS0
N x DS0, equivalently referred to as N x 64 kbps, is an emerging standard for wideband calls
separate from H0, H11, and H12 ISDN channels. The emerging N x DS0 ISDN multirate circuit
mode bearer service will provide circuit-switched calls with data-rate multiples of 64 kbps up to
1536 kbps on a T1 facility or up to 1920 kbps on an E1 facility. In the switch, N x DS0 channels will
range up to 1984 kbps using NFAS E1 interfaces.
NANP
North American Numbering Plan
narrowband
A circuit-switched call at a data rate up to and including 64 kbps. All nonwideband switch calls are
considered narrowband.
native terminal support
A predefined terminal type exists in switch software, eliminating the need to alias the terminal (that
is, manually map call appearances and feature buttons onto some other natively supported
terminal type).
NAU
Network access unit
NCA/TSC
Noncall-associated/temporary-signaling connection
NCOSS
Network Control Operations Support Center
NCSO
National Customer Support Organization
NEC
National Engineering Center
NEMA
National Electrical Manufacturer’s Association
NETCON
Network-control circuit pack
network
A series of points, nodes, or stations connected by communications channels.
network-specific facility (NSF)
An information element in an ISDN-PRI message that specifies which public-network service is
used. NSF applies only when Call-by-Call Service Selection is used to access a public-network
service.
network interface
A common boundary between two systems in an interconnected group of systems.