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N

NAW-CDMA	North American Wideband CDMA
NAA	Next Available Agent
NACN	North American Cellular Network
NACS	NetWare Asynchronous Communication Services
NADC	North America Digital Cellular
NAK	Negative Acknowledgement
NAM	Number Assignment Module
N-AMPS	Narrowband Advanced Mobile Phone Service
NANC	North American Numbering Council
Nano	One-billionth
NANOG	North American Network Operator’s Group
NANP	North America Numbering Plan
NAP	Network Access Point; Network Access Provider
NARTE	National Association of Radio & Telecommunications Engineers
NARUC	National Association of Regulatory Utility Commissioners
NASC-800	Number Administrations and Services Center 800
NAT	Network Address Translation
NATA	North American Telecommunications Association
NATOA	National Asociation of Telecommunications Officers and Advisors
NBH	Network Busy Hour
NBMA	Non-Broadcast Multi-Access
NC	Network Computer;No Circuit
NC Codes	Network Channel Codes
NCAS	Non-Call Associated Signaling
NIC Code	Network Channel Interface Code
NCIA	Native Client Interface Architecture (Cisco)
NCCF	Network Communications Control Facility
N-CDMA	Narrowband Code Division Multiple Access
NCP	Network Control Program
NCS	Net Control Station
NDIS	Network Driver Interface Specifications
NDUB	Network-Determined User Busy
NE	Network Element
NEBE	Near End Block Error
NEBS	Network Equipment Building System
NEC	National Electric Code
NECA	National Exchange Carrier Association
NENA	National Emergency Numbering Association
NEP	Noise Equivalent Power
.net	One of the top-level Internet domain names
NEXT	Near End Crosstalk
NFS	Network File System
NGN	Next Generation Network
NI	Network Interface
NI-1	National ISDN-1
NIC	Network Interface Card
NID	Network Interface Device
N-ISDN	Narrowband Intergrated Service Digital Network
NIST	National Insitute of Standards and Technology
NIU	Network Interface Device
NLX	Intel’s successor to the LPX motherboard design
NMC	Network Management Center
NMS	Network Managenent System
NMT	Nordic Mobile Telephone
NMTS	Nordic Mobile Telephone Service
NMVT	Network Mangement Vector Transport
NNI	Network-Network Interface; Network-Node Interface
NNTP	Network News Transfer Protocol
NNX	The current general configuration for Exchange Codes within each Area Code
NNX Code	The 3-digit code used historically for local Exchange Codes
NOC	Network Operations Center
NOS	Network Operations System
Np	Neeper
NPA	Numbering Plan Area
NPA Routing	Numbering Plan Area Routing
NPF	Network Processing Forum
nrt-VBR	Non-Real-Time Variable Bit Rate
NRZ	Non-Return-to-Zero
NRZ-M	Non-Return-to-Zero Mark
NSA	National Security Agency
NSAP	Network Service Access Point
NSGR	Network Standards Generic Requirements
NSP	Network Service Provider
NSS	Network Switching Subsystem
NT	Network Termination
NT1	ISDN, Network Termination Type 1
NTACS	Narrowband Total Access Communications System
NTIA	National Telecommunications and Information Administration
NTN	National Telecommunications Network; Network Terminal Number
NTP	Network Time Protocol
NTSC	National Television Standards Committee
NTU	Network Termination Unit
NUL	Null Character
NVE	Network Visible Entity
NVIS	Near-Vertical-Incidence Skywave
Nx64	Describes a contiguous bit stream to an application at the Nx63 rate
NXX	Network Numbering Exchange
NZ-DSF	Non-Zero-Dispersion-Shifted Fiber
“N” Series	A large radio frequency connector covered by military specification.
“NC” Contacts	Contacts that are normally closed when the control circuit is not energized.
“NO” Contacts	Contacts that are normally open when the control circuit is not energized.
Nest	Part of a crimping die set, the nest provides the location and support for the terminal barrel as it is being deformed into the desired crimp configuration by the indentor. (Also called Anvil.)
Network Layer	The third layer of the OSI model of data communications, which involves routing data messages through the network using alternative routes. (See OSI Standards.)
Nick	A small cut or notch in the conductor strands or insulation.
Nickel (Ni)	Metallic element with Atomic Number 28. High purity nickel is used for applications in which copper would normally be used, but where high temperatures are most likely to be encountered.
Nodes, Stations	Points in a network where service is provided, service is used or communications channels are interconnected. Nodes are sometimes used interchangeably with workstations.
Noise	Refers to random spurts of electrical energy or interference.
Noncontaminating Compound	A compounded material that will not leach ingredients, so as to contaminate or degrade adjacent materials, under given environmental conditions.
Nonfunctional Land	A land on internal or external layers not connected to the conductive pattern on its layer.
Non-Insulated Terminals	As the name implies, solderless terminals without insulation.
Nonpolar Solvents	Solvents that are not ionized sufficiently to be electrically conductive and that cannot dissolve nonpolar compounds, such as hydro-carbons and resins.
Nonwetting	A condition whereby a surface has contacted molten solder but has had none of the solder adhere to it.
Normal Force, Normal Contact Force	The force perpendicular to the contact interface.
Nude Contact	A contact with a locking member that remains in the insert at all times.
Numerical Aperture (NA)	A characteristic parameter of any given fiber’s light-gathering capability, defined by the maximum angle of light that is relative to the fiber’s axis, and that is propagated through the fiber. It is the sine of the vertex angle of the largest cone of meridional rays that can enter or leave an optical system or element, multiplied by the refractive index of the medium in which the vertex of the cone is located.

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