NANC - North American Numbering Council
34-member industry council appointed by the FCC, which must choose an
numbering administrator to assume from
Bellcore the responsibility of administering the North American Numbering Plan (NANP).
NANP - North American Numbering Plan
Assigns area codes and sets rules for calls to be routed across North
America. A plan for
the allocation of unique 10 digit address
numbers. The numbers consist of a 3 digit area code, a 3 digit office
code and a 4 digit line number.
communications circuit / path used for only voice, facsimile images,
video images and data transmissions
at kilobit speeds. It usually implies a speed of 56 Kbps or less.
NASC - 800 Number Administration and Service Center
The organization that administers the SMS/800
system for the reservation, registration and
administration of all North American 800 numbers for all carriers.
(See 800 Portability, RespOrg and SMS/800)
NC Codes - Network Channel Codes
Industry standard codes that define the type of service being provided at
each end of a circuit.
NCI Codes - Network Channel Interface Codes
Industry standard codes that define the wiring, protocol, signaling, etc
which are to be used as an interface on the A
Location of a circuit.
NE - Network Element
A system that supports
at least NEFs and may also support Operation System Functions/Mediation Functions. An ATM NE may be realized as either
a stand alone device or a geographically distributed
NEF - Network Element Function
within an ATM entity that supports the STM based network transport services.
NENA - National Emergency Number Association
National industry forum that includes police, fire,
community administrators and telecommunications
vendors (service providers) with a involvement in emergence 911 services.
NETBIOS - Network Basic Input/Output System
This system provides a Session layer interface
between network applications running on a PC and the
underlying protocol software of the Transport and Network layers on
the ODI model. Normally a LAN protocol.
A system of interrelated
elements that are interconnected in a dedicated or switched linkage
to provide local or remote communication (of
voice, video, data, etc.) and to facilitate the exchange of information between end users with common
interests. The set of switches, circuits, trunks and
software that make up a telecommunications facility.
Network Control Center - NCC
Equipment, people, systems and procedures that monitor network activity and
react to unusual situations. Also known
as Network Operations Center (NOC) which performs the testing, installation and maintenance functions with regard
to individual circuits.
Network File System -
This system is a protocol developed to
use IP and allow a set of computers to access each
other's file systems as if they were on the local host.
Network Node Interface - NNI
An ATM term
which describes the interface between two public network pieces of
A protocol defined by the ATM forum to
govern how ATM switches establish connection and how
ATM requests are routed through the network.
Network to Network Interface - NNI
connection between two public frame relay services, and includes elements
such as bi-directional polling, to assist the network
services providers with gaining information on the status of the public networks being interconnected.
Network Service Address
that define physical or logical locations in equipment, such as a
Generic term used to refer to an
entity that accesses a network.
Unwanted electrical signals
introduced into telephone lines by circuit components or natural
disturbances which tend to degrade the performance of
A PBX is non-blocking if all
callers can be switched through the PBX even during the busiest
time of day. Indicates that the internal
network of the switching system is such that the total
number of available transmission paths is equal to
the number of ports.
Non-Recurring Charge - NRC
as OTC - One-Time (Setup) Charge.
NPA - Numbering Plan Areas
American "Area Codes." (3 digits: 2-to-9, 0-or-1, 0-to-9. Middle
digit to expand soon)
NPAC - Number Portability Administration Center
The regional, neutral third-party center which
administers number portability transactions between
service providers, handles conflict resolution and assists carriers in
synchronizing the porting processes.
Area Code Routing. Route
calls based on the originating ANI NPA (area code.)
Subdividing an area code,
with the creation of a new area code. This is necessary when the
number of telephones in an area code (NPA)
grows to an excessive number.
NSP - New Service Provider
selection of exchange carrier that will be provided dial tone. This
will usually be the exchange carrier that is not the
default SP for the NPA. This is also the recipient switch for the porting of a number when the end-user is being
The ability for
telephone subscribers to take their phone numbers with them when they change
telephone service providers.
Exchanges (First 3 digits of a
7-digit phone number). (2-to-9, 0-to-9, 0-to-9) (Digits 4, 5 and 6 in a 10 digit NANP telephone number -
NPA-NXX-XXXX). Identifies the specific telephone company central office which serves that number.