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 , elimina ting the need to al ias the terminal (tha t
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 Cal l-by-Call Service Selection is used to access a public-netw ork
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
NMNetwork management
NNNational number