Telecommunications terms starting with N

258 terms

network loss Loss added to the network to control echo. [T1.508-1998]
network management The execution of the set of functions required for controlling, planning, allocating, deploying, coordinating, and monitoring the resources of a…
network manager In network management, the entity that initiates requests for management information from managed systems or receives spontaneous management-related…
Network Modification A Network Modification is any type of planned equipment, software, trunk or facility activity which has the potential to significantly affect…
network node (NN) A grouping of one or more network elements (at one or more sites) which provides network related functions, and is administered as a single entity.
network number An identification number, within a computer network or set of interconnected networks, that uniquely identifies a computer.
network operating system (NOS) Software that (a) controls a network and its message (e.g., packet) traffic, and queues, (b) controls access by multiple users to network resources such…
network operations center (NOC) A centralized organization responsible for the operation and maintenance of its network. [2382-pt.35]
network operator The operator responsible for the development, provision and maintenance of real-time networking services and for operating the corresponding networks.
network outpulsing state A call state in which the network transmits the caller's emergency service ID (CESID) to the public service answering point (PSAP) customer installation…
network outward dialing (NOD) Synonym direct outward dialing.
network performance The qualitative level at which a network fulfills its function. [After T1.Rpt24-1993]
network provided number (NPN) An ISDN number, supplied by the calling user's or the redirecting user's network, which is associated with the calling user or the redirecting user.
network provider The organization that maintains and operates the network components required for intelligent network (IN) functionality.
network reliability See network survivability.
network restoration Automatic or manual methods to return a network to its normal function in response to a network failure. [T1.Rpt24-1993]
network section The network components that provide a virtual connection between two circuit sections.
network security Protection of networks and their services from unauthorized modification, destruction, or disclosure.
network security architecture [A] subset of network architecture specifically addressing security-relevant issues. [INFOSEC-99]
network service part The combination of the MTP (message transfer part) and the SCCP (signaling connection control part). [T1.110-1987]
network side The side of the network interface or the network functions as seen from the interface. [T1.601-1988]
network site A collection of functional units that provide network services and that belong to one management domain and are considered as a whole. [2382-pt.35] 2.
network surveillance A process concerned with surveillance of the network as a whole. It includes activities for coordination and assigning priorities to maintenance actions.
network survivability The (a) ability of a network to maintain or restore an acceptable level of performance during network failures by applying various restoration techniques…
network survivability model The analytical processes for estimating how well network services will be affected and restored with transparencies to the users as a result of a failure.
network terminal number (NTN) In the ITU-T International X.121 format, the sets of digits that comprise the complete address of the data terminal end point.
network terminating interface (NTI) Synonym for demarcation point.
network termination Network equipment that provides functions necessary for network operation of ISDN access protocols.
network termination 1 (NT1) In Integrated Services Digital Networks (ISDN), a functional grouping of customer-premises equipment that includes functions that may be regarded as…
network termination 2 (NT2) In Integrated Services Digital Networks (ISDN), an intelligent device that may include functionality for OSI Layers 1 through 3 (dependent on individual…
network topology The specific physical, i.e., real, or logical, i.e., virtual, arrangement of the elements of a network.
network trusted computing base (NTCB) [The] totality of protection mechanisms within a network, including hardware, firmware, and software, the combination of which is responsible for…
network utility An internetwork administrative signaling mechanism in the call control procedure between packet switching public data networks.
network weaving In computer security, a penetration technique in which different communication networks are used to gain access to a data processing system to avoid…
network-launched application In a computer networking environment, an application (program) that is centrally stored, e.g.
Neutral A term drivers use when referring to how their car is handling. When a car is neither loose nor pushing (tight).
neutral direct-current telegraph system A telegraph system in which (a) current flows during marking intervals and no current flows during spacing intervals for the transmission of signals over…
neutral ground An intentional ground applied to the neutral conductor or neutral point of a circuit, transformer, machine, apparatus, or system.
neutral operation A method of teletypewriter operation in which marking signals are formed by current pulses of one polarity, either positive or negative, and spacing…
neutral relay A relay in which the direction of movement of the armature does not depend upon the direction of the current in the circuit controlling the armature.
new customer premises equipment All customer premises equipment not in service or in the inventory of a regulated telephone utility as of December 31, 1982.
Newly Acquired Numbers "Newly acquired numbers" are those that have been activated within the LERG Routing Guide, and thus are available for assignment, within the preceding 90…
news client Synonym newsreader.
news server A server on a network that stores, organizes, and distributes messages for selected newsgroups. [2382-pt.35]
newsfeed The periodic transfer of newly posted newsgroup articles from one NNTP server to another using the NNTP protocol.
newsgroup An online discussion group that users with news readers can participate in. An IBM® Lotus® Domino™ NNTP server can store USENET newsgroups, public…
newsreader A client application that runs the NNTP protocol and is used to select, view, create, sort, and print USENET and private newsgroup articles.
NF Abbreviation for noise figure.
NFS Network File System, which allows you to mount a remote filesystem as if it were local.
Nibble A 4 Bit aggregation - or half an octet.
NIC National Intelligence Council.
NID Naval Intelligence Database (USN term).
NII National Information Infrastructure.
nine-hundred (900) service A telephone service via which the caller may access information on a charge-per-call or charge-per-time basis.
NIU NATO Interface Unit.
Nmap A security-violating, network-scanning tool that can scan a network using a variety of protocols, can operate in stealth mode, and can automatically…
nmi Abbreviation for nautical mile.
NNTP Abbreviation for network news transfer protocol. An application protocol that provides the means to transfer files for computer conferences.
no circuit (NC) A call-disposition category for a call attempt that does not find an available outgoing trunk. [T1.207-1998]
no circuit double prime (NC&qout;) An SIT (special information tone) classification for call attempts that fail to find an available long distance service provider outgoing trunk. [T1.
no circuit prime (NC') An SIT (special information tone) classification for call attempts that fail to find an available Local Service Provider outgoing trunk. [T1.207-1998]
no-lone zone [An] Area, room, or space that, when staffed, must be occupied by two or more appropriately cleared individuals who remain within sight of each other.
NOD Acronym for network outward dialing.
nodal clock The principal clock or alternate clock located at a particular node that provides the timing reference for all major functions at that node.
nodal point Synonym node.
node Any device connected to network. PCs, servers, and printers are all nodes on the network.
Noise Any unwanted sound that interferes with speech and hearing, causes damage to hearing, or annoys a person.
noise current Interfering and unwanted electrical currents in a device or system. 2. In optical communications, the rms component of the optical detector output…
noise equivalent power (NEP) At a given data-signaling rate or modulation frequency, operating wavelength, and effective noise bandwidth, the radiant power that produces a…
noise factor Synonym noise figure.
noise field An indication of the level of background noise that the terminating end-point may play out in the absence of packets. [T1.312-1991]
noise figure (NF) Of an active device, over the bandwidth of interest, the contribution by the device itself to thermal noise at its output.
noise level The noise power, usually relative to a reference. Note: Noise level is usually measured in dB for relative power or picowatts for absolute power.
noise power The power generated by a random electromagnetic process. 2. Interfering and unwanted power in an electrical device or system. 3.
noise power density The noise power in a bandwidth of 1 Hz, i.e., the noise power per hertz at a point in a noise spectrum.
noise suppression Reduction of the noise power level in electrical circuits. 2. The process of automatically reducing the noise output of a receiver during periods when no…
noise temperature At a pair of terminals, the temperature of a passive system having an available noise power per unit bandwidth at a specified frequency equal to that of…
noise voltage Interfering and unwanted voltage in an electronic device or system. 2. In optical communications, the rms component of the optical detector output…
noise weighting A specific amplitude-vs.-frequency characteristic that permits a measuring set to give numerical readings that approximate the interfering effects to any…
noise window A notch, i.e., a dip, in the noise frequency spectrum characteristic of a device, such as a transmitter, receiver, channel, or amplifier, from external…
noisy black 1. In facsimile or display systems, such as television, a nonuniformity in the black area of the image, i.e.
noisy white 1. In facsimile or display systems, such as television, a nonuniformity in the white area of the image, i.e.
nominal bandwidth The widest band of frequencies, inclusive of guard bands, assigned to a channel.
nominal bit stuffing rate The rate at which stuffing bits are inserted when both the input and output bit rates are at their nominal values.
nominal linewidth In facsimile systems, the average separation between centers of adjacent scanning or recording lines.
non-call associated signaling (NCAS) Signaling that is independent of an end-to-end bearer connection, including support for the functions of registration, authentication, and validation.
non-fixed access In personal communications service (PCS), terminal access to a network in which there is no set relationship between a terminal and the access interface.
non-repeated video frame (active frame) See active video frame identification.
non-return-to-zero (NRZ) A code in which "1s" are represented by one significant condition and "0s" are represented by another, with no neutral or rest condition, such as a zero…
non-return-to-zero change-on-ones (NRZ1) A code in which "1s" are represented by a change in a significant condition and "0s" are represented by no change.
non-return-to-zero mark (NRZ-M) A binary encoding scheme in which a signal parameter, such as electric current or voltage, undergoes a change in a significant condition or level every…
non-return-to-zero one (NRZ-1) Synonym non-return-to-zero mark.
non-return-to-zero space (NRZ-S) A binary encoding scheme in which a signal parameter, such as electric current or voltage, undergoes a change in a significant condition or level every…
non-transparent loopback A loopback in which the signal transmitted beyond the loopback point (the forward signal) when the loopback is activated, is not the same as the received…
nonassociated common-channel signaling A form of common-channel signaling where the signaling channel serves one or more trunk groups, at least one of which terminates at a point other than the…
nonassociated mode of signaling The signaling mode in which messages involving two (nonadjacent) signaling points are communicated between them over two or more signaling links in tandem…
nonblocking switch A switch that has enough paths across it that an originated call can always reach an available line without encountering a busy condition.
Nonce A value used in security protocols that is never repeated with the same key. For example, challenges used in challenge-response authentication protocols…
noncentralized operation Operation that uses a control discipline for multipoint data communication links in which transmission may be between tributary stations or between the…
noncircularity Synonym ovality.