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Glossary and Abbreviations
Issue 5 January 1998 GL-35555-230-024
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.
NFAS
See Nonfacility-associated signaling (NFAS).
NI
Network interface
NID
Network Inward Dialing
NM
Network management
NN
National number