data base node (DBN)A signaling point that acts as a repository of information and provides query/response services for processing and routing of certain types of network…
data busA bus used to transfer data within or to and from a processing unit or storage device.
data channelCommunication link(s) over which the actual data of interest flows. High Bandwidth; authenticated by default; encryption and integrity protection optional.
data circuit connectionThe interconnection of any combination of links and trunks, on a tandem basis, by means of switching equipment to facilitate information interchange.
data collection processorA communications device, serving as mediation equipment in the telecommunication management network, that provides concentration, protocol conversion, and…
data communicationThe transfer of information between functional units by means of data transmission according to a protocol.
data communication control procedureA means used to control the orderly communication of information among stations in a data communication network.
data communication network (DCN)A configuration of telecommunication facilities for the purpose of transmitting data, as opposed to analog signals. [After T1.210-1989]
data compactionThe reduction of the number of data elements, bandwidth, cost, and time for the generation, transmission, and storage of data without loss of information…
data compositeA collection of data elements treated as a unit. [T1.238-1994/97] [T1.266-2000]
data compressionIncreasing the amount of data that can be stored in a given domain, such as space, time, or frequency, or contained in a given message length. 2.
data concentratorA functional unit that permits a common transmission medium to serve more data sources than there are channels currently available within the transmission…
data conferencing repeaterA device that enables any one user of a group of users to transmit a message to all other users in that group. Synonym technical control hubbing repeater.
data corruptionAn accidental or intentional violation of data integrity. [2382-pt.8]
data country codeA 3-digit numerical country identifier that is part of the 14-digit network terminal numbering plan.
data definitionThe process of creating a complete description of the structure of a database by identifying and describing data elements and their relationships that…
Data definition language (DDL)(DDL)SQL statements that can be used either interactively or within programming language source code to define databases and their components.
data dictionaryA catalog of all data held in a database, or a list of items giving data names and structures. Also referred to as DD/D for data dictionary/directory.
data directorya directory that contains local applications, local templates, country language services (CLUs) files, DESKTOP.
Data ElementA combination of characters or bytes referring to one separate piece of information, such as name, address, or age.
Data Encryption Standard (DES)A U.S. Government-approved, symmetric cipher, encryption algorithm used by business and civilian government agencies.
data forwarderA device that (a) receives data from one data link and retransmits data representing the same information, using proper format and link protocols, to…
data frameA presentation unit of the data channel; a defined group of consecutive data bits.
Data IntegrityThe state that exists when computerized data is the same as that in the source documents and has not been exposed to accidental or malicious alteration or…
data itemA named component of a data element; usually the smallest component. 2. A subunit of descriptive information or value classified under a data element.
data keyA cryptographic key used for authentication or for encryption and decryption. [After X9.17]
data linkThe means of connecting one location to another for the purpose of transmitting and receiving data. [JP 1-02] 2.
data link connection identifier (DLCI)In frame-relay transmission systems, 13-bit field that defines the destination address of a packet. The address is local on a link-by-link basis.
data link escape character (DLE)A transmission control character that changes the meaning of a limited number of contiguously following characters or coded representations.
Data Link LayerSee Open Systems Interconnection--Reference Model.
data loggingThe dating, time-labeling, and recording of data.
data managementThe control of data handling operations--such as acquisition, analysis, translation, coding, storage, retrieval, and distribution of data--but not…
data mediumThe material in or on which one or more characteristics of the material may be used to represent information statically or dynamically.
Data MiningData mining generally refers to techniques for extracting summaries and reports from an organizations databases and data sets.
data modeIn a communications network, the state of data circuit-terminating equipment (DCE) when connected to a communications channel and ready to transmit data…
data network identification code (DNIC)In the ITU-T International X.121 format, the first four digits of the international data number, the three digits that may represent the data country…
data numbering plan area (DNPA)In the U.S. implementation of a ITU-T X.25 network, the first three digits of a network terminal number (NTN).
data phaseThe phase of a data call during which data may be transferred between data terminal equipments (DTEs) that are interconnected via the network.
data processingHandling and processing of information necessary to record the transactions of an organization.
data processing equipmentOffice equipment such as that using punched cards, punched tape, magnetic or other comparable storage media as an operating vehicle for recording and…
data protectionThe implementation of administrative, technical, or physical measures to guard against the unauthorized access to data. [2382-pt.8]
data restorationThe act of regenerating data that have been lost or contaminated. Note: Methods include copying data from archive, data reconstitution from alternative…
data scramblerA device used in digital transmission systems to convert digital signals into a pseudorandom sequence that is free from long strings of simple patterns…
data security[The] protection of data from unauthorized (accidental or intentional) modification, destruction, or disclosure. [INFOSEC-99]
data separationThe application of encryption as a means of access control. [After X9.69]
data service unit (DSU)A device used for interfacing data terminal equipment (DTE) to the public telephone network. 2.
data setA named or defined collection of data. See also Production Data Set and Privilege Data Set.
data signaling rate (DSR)The aggregate rate at which data pass a point in the transmission path of a data transmission system.
data sourceAny repository of data from which documents can be retrieved, such as the Web, relational and nonrelational databases, and content management systems.
data stationData terminal equipment (DTE), data circuit-terminating equipment (DCE), and any intermediate equipment connected at one location.
data streamA sequence of digitally encoded signals used to represent information in transmission.
data subscriber terminal equipmentIn the DDN, a general purpose terminal device that consists of (a) all the equipment necessary to provide interface functions, perform code conversion…
data switching exchange (DSE)The equipment installed at a single location to perform switching functions such as circuit switching, message switching, and packet switching.
data templateA specified logical structure for a collection of data objects, including allowable ranges for their values and other data consistency specifications. [T1.
data transfer device[A] fill device designed to securely store, transport, and transfer electronically both COMSEC and TRANSEC key, designed to be backward compatible with…
data transfer rateThe average number of bits, characters, or blocks per unit time passing between corresponding equipment in a data transmission system.
data transfer request signalA call control signal transmitted by the data circuit-terminating equipment (DCE) to the data terminal equipment (DTE) indicating that a request signal…
data transfer timeThe time between (a) the instant at which a user data unit, such as a character, word, block, or message, is made available to a network for transfer by a…
data transmissionThe sending of data from one place to another by means of signals over a channel.
Data Transmission (107 Type) Test LineThe term "Data Transmission (107 Type) Test Line" denotes an arrangement which provides for a connection to a signal source which provides test signals…
data transmission circuitThe transmission media and the intervening equipment used for the transfer of data between data terminal equipments (DTEs).
data unitA single kind of data for which the identification and description are identical for all occurrences. It may be a data element or a data composite. [T1.
data validationA process used to determine if data are accurate, complete, or meet specified criteria. [2382-pt.8]
data volatilityPertaining to the rate of change in the values of stored data over a period of time.
data-dependent protectionThe application of protective data elements to a data stream in such a manner that the composition of the data stream determines the amount or type of…
databaseIn electronic records a database is a set of data elements consisting of at least one file, or of a group of integrated files, usually stored in one…
database engineeringThe discipline involving (a) the conception, modeling, and creation, i.e., programming, of a database, (b) data analysis and administration of the…
datagramA packet of information passed between two communicating processes across a network.
dateAn instant in the passage of time, identified with desired precision by a clock and a calendar.
date-time group (DTG)In a message, a set of characters, usually in a prescribed format, used to express the day of the month, the hour of the day, the minute of the hour, the…
dating formatThe format used to express the time of an event. Note: The time of an event on the UTC time scale is given in the following sequence: hour, day, month…
dBµAbbreviation. dB referenced to 1 microvolt. Used for receiver sensitivity measurement.
dBaAbbreviation for decibels adjusted. Weighted absolute noise power, calculated in dB referenced to 3.16 picowatts (-85 dBm), which is 0 dBa.
dBa(F1A)Weighted absolute noise power in dBa, measured by a noise measuring set with F1A-line weighting.
dBa(HA1)Weighted noise power in dBa, measured across the receiver of a 302-type or similar subscriber set, by a noise measuring set with HA1-receiver weighting.
dBa0Noise power in dBa referenced to or measured at zero transmission level point (0TLP), also called a point of zero relative transmission level (0 dBr).
dBcAbbreviation. dB relative to the carrier power.
dBiAbbreviation. In the expression of antenna gain, the number of decibels of gain of an antenna referenced to the zero dB gain of a free-space isotropic…
DBMStands for "Data Base Management" routines, a set of routines that emulate an "associative array" using disk files.
dBm(psoph)Noise power in dBm, measured with psophometric weighting where where pWp is power in picowatts psophometrically weighted and dBa is the weighted noise…
dBm0Power in dBm referred to or measured at a zero transmission level point (0TLP).