Browse Definitions :

Data transmission

Terms related to data transmission, including definitions about communication channels and words and phrases about point-to-point and point-to-multipoint data transfers.

10 - FLO

  • 10 gigabit Ethernet (10 GbE) - 10 gigabit Ethernet is a telecommunication technology that offers data speeds up to 10 billion bits per second.
  • 2600 - 2600 is the frequency in hertz (cycles per second) that AT&T formerly put as a steady signal on any long-distance telephone line that was not currently in use.
  • A-Law - A-Law is the standard codec (compression/decompression) algorithm for pulse code modulation (PCM) from the ITU-T (the Telecommunication Standardization Sector of the International Telecommunications Union).
  • ACK - In some digital communication protocols, ACK is the name of a signal that data has been received successfully (for example, with an acceptable number of errors).
  • ADPCM (adaptive differential pulse-code modulation) - ADPCM (adaptive differential pulse-code modulation) is a technique for converting sound or analog information to binary information (a string of 0's and 1's) by taking frequent samples of the sound and expressing the value of the sampled sound modulation in binary terms.
  • ADSI (Analog Display Services Interface) - ADSI (Analog Display Services Interface) is the standard protocol for enabling alternate voice and data services, such as a visual display at the phone, over the analog telephone network.
  • airplane mode - Airplane mode is a setting on cell phones, smartphones and other mobile communication devices that prevents the device from sending or receiving calls and text messages.
  • alien crosstalk (AXT) - Alien crosstalk (AXT) is electromagnetic noise that can occur in a cable that runs alongside one or more other signal-carrying cables.
  • AMTOR (amateur teleprinting over radio) - AMTOR (amateur teleprinting over radio) is a digital communications method used by radio amateurs, in which the frequency of errors is reduced by handshaking or character repetition.
  • analog telephone adapter (ATA) - An analog telephone adaptor (ATA) is a device used to connect a standard telephone to a computer or network so that the user can make calls over the Internet.
  • apogee - When a satellite follows a non-circular orbit around the earth, the satellite's path is an ellipse with the center of the earth at one focus.
  • application streaming - Application streaming is an on-demand software delivery model that takes advantage of the fact that most applications require only a small fraction of their total program code to run.
  • attempt - In a telecommunications system, an attempt is a user request to get connected to the system or to initiate a call, whether or not the connection is made or the call is initiated.
  • AUI (attachment unit interface) - The AUI (attachment unit interface) is the 15-pin physical connector interface between a computer's network interface card (NIC) and an Ethernet cable.
  • automated speech recognition (ASR) - Automated speech recognition (ASR) is a technology that allows users of information systems to speak entries rather than punching numbers on a keypad.
  • azimuth and elevation - Azimuth and elevation are angles used to define the apparent position of an object in the sky, relative to a specific observation point.
  • B8ZS (bipolar 8-zero substitution, binary 8-zero substitution, clear channel, clear 64) - B8ZS (bipolar 8-zero substitution, also called binary 8-zero substitution, clear channel, and clear 64) is an encoding method used on T1 circuits that inserts two successive ones of the same voltage - referred to as a bipolar violation - into a signal whenever eight consecutive zeros are transmitted.
  • backhaul - Backhaul, a term probably derived from the trucking industry, has several usages in information technology.
  • bandwidth - Bandwidth is the capacity of a wired or wireless network communications link to transmit the maximum amount of data from one point to another over a computer network or internet connection in a given amount of time -- usually one second.
  • baseband - Describes a telecommunication system in which information is carried in digital form on a single unmultiplexed signal channel on the transmission medium.
  • bipolar signaling (bipolar transmission) - Bipolar signaling, also called bipolar transmission, is a baseband method of sending binary data over wire or cable.
  • black box (black box testing) - Black box testing assesses a system solely from the outside, without the operator or tester knowing what is happening within the system to generate responses to test actions.
  • bridge tap - A bridge tap is an extraneous length of dangling, unterminated cable on a communications line, usually left over from an earlier configuration, that can cause impedance mismatches and other undesired effects in transmissions.
  • Broadband Integrated Services Digital Network (BISDN) - BISDN is both a concept and a set of services and developing standards for integrating digital transmission services in a broadband network of fiber optic and radio media.
  • Broadband over Power Line (BPL) - Broadband over Power Line (BPL) is a technology that allows Internet data to be transmitted over utility power lines.
  • Broadband Technology Opportunities Program (BTOP) - The Broadband Technology Opportunities Program (BTOP) is an initiative within the American Recovery and Reinvestment Act (ARRA) created to promote the development and adoption of broadband throughout the United States, particularly in unserved and underserved areas.
  • bulk data transfer - Bulk data transfer is a software application feature that uses data compression, data blocking and buffering to optimize transfer rates when moving large data files.
  • burstiness - Burstiness is an intermittent type of data transmission.
  • bus network - A bus network is an arrangement in a local area network (LAN) in which each node (workstation or other device) is connected to a main cable or link called the bus.
  • cable head-end - A cable head-end (or headend) is the facility at a local cable TV office that originates and communicates cable TV services and cable modem services to subscribers.
  • cable modem termination system (CMTS) - A cable modem termination system (CMTS) is a component that exchanges digital signals with cable modems on a cable network.
  • call control - Call control is a process that is used in telecommunications networks to monitor and maintain connections once they have been established.
  • call deflection - Call deflection is a feature of voice over IP (VoIP) that automatically redirects a call from the called endpoint to another endpoint (usually a voice mailbox) when the called endpoint is busy.
  • call detail record (CDR) - A call detail record (CDR) in voice over IP (VoIP) is a file containing information about recent system usage such as the identities of sources (points of origin), the identities of destinations (endpoints), the duration of each call, the amount billed for each call, the total usage time in the billing period, the total free time remaining in the billing period, and the running total charged during the billing period.
  • call signaling - Call signaling is a process that is used to set up a connection in a telephone network.
  • carrier detect - Carrier detect (see modem lights) is a control signal between a modem and a computer that indicates that the modem detects a "live" carrier that can be used for sending and receiving information.
  • carrier signal - A carrier signal is a transmitted electromagnetic pulse or wave at a steady base frequency of alternation on which information can be imposed by increasing signal strength, varying the base frequency, varying the wave phase, or other means.
  • carrier-to-noise ratio (CNR or C/N) - In communications, the carrier-to-noise ratio, often written CNR or C/N, is a measure of the received carrier strength relative to the strength of the received noise.
  • carrierless amplitude/phase (CAP) - Carrierless amplitude/phase (CAP) modulation was the original approach for modulation of a Digital Subscriber Line (DSL) signal.
  • CDDI (Copper Distributed Data Interface) - For a local area network (LAN), CDDI (Copper Distributed Data Interface) is a standard for data transmission based on FDDI (Fiber Distributed Data Interface) that uses shielded twisted-pair (STP) or unshielded twisted pair (UTP) copper wire instead of fiber optic lines.
  • chatty protocol - A chatty protocol is an application or routing protocol that requires a client or server to wait for an acknowledgement before it can transmit again.
  • chiral fiber - Chiral fiber is a specialized optical fiber medium with its core twisted into a helical shape.
  • circuit - In electronics, a circuit is a path between two or more points along which an electrical current can be carried.
  • circular mil - The circular mil is a unit of area used especially when denoting the cross-sectional size of a wire or cable.
  • click-to-talk (CTC) - Click-to-call (CTC), also called click-for-talk, is a technology that converts Web traffic into voice telephone connections using VoIP (Voice over IP).
  • cloud - In telecommunications, a cloud is the unpredictable part of any network through which data passes between two end points.
  • cloud seeding - Cloud seeding is a strategy for uploading large amounts of data to a cloud storage service.
  • coarse wavelength division multiplexing (CWDM) - Coarse wavelength division multiplexing (CWDM) is a method of combining multiple signals on laser beams at various wavelengths for transmission along fiber optic cables, such that the number of channels is fewer than in dense wavelength division multiplexing (DWDM) but more than in standard wavelength division multiplexing (WDM).
  • coaxial antenna - A coaxial antenna is a variant of the dipole antenna, designed for use with an unbalanced feed line.
  • cognitive radio (CR) - Cognitive radio (CR) is a form of wireless communication in which a transceiver can intelligently detect which communication channels are in use and which are not, and instantly move into vacant channels while avoiding occupied ones.
  • common channel signaling (CCS) - Common channel signaling (CCS) is signaling (for example, in a T-carrier system line) in which a group of voice-and-data channels share a separate channel that is used only for control signals.
  • Complementary Code Keying (CCK) - Complementary Code Keying (CCK) is a modulation scheme used with wireless networks (WLANs) that employ the IEEE 802.
  • composite video (baseband video or RCA video) - Composite video, also called baseband video or RCA video, is the analog waveform that conveys the image data in a conventional National Television Standards Committee (NTSC) television signal.
  • conditional access (CA) - Conditional access (CA) is a technology used to control access to digital television (DTV) services to authorized users by encrypting the transmitted programming.
  • connection - In telecommunication and computing in general, a connection is the successful completion of necessary arrangements so that two or more parties (for example, people or programs) can communicate at a long distance.
  • connectionless - In telecommunication, connectionless describes communication between two network end points in which a message can be sent from one end point to another without prior arrangement.
  • continuous media - Continuous media is data where there is a timing relationship between source and destination.
  • CRC-4 (Cyclic Redundancy Check 4) - CRC-4 (Cyclic Redundancy Check 4) is a form of cyclic redundancy checking (a method of checking for errors in transmitted data) that is used on E-1 trunk lines.
  • data compression - Data compression is a reduction in the number of bits needed to represent data.
  • data link layer - The Data-Link Layer is the protocol layer in a program that handles the moving of data in and out across a physical link in a network.
  • data streaming - Data streaming is the continuous transfer of data at a steady, high-speed rate.
  • DCIT (Digital Compression of Increased Transmission) - DCIT (Digital Compression of Increased Transmission) is an approach to compressing information that compresses the entire transmission rather than just all or some part of the content.
  • decibels relative to carrier (dBc) - dBc (decibels relative to carrier) is a measure of the strength of an instantaneous signal at radio frequency.
  • dedicated line - A dedicated line is a telecommunications path between two points that is available 24 hours a day for use by a designated user (individual or company).
  • demarc (demarcation point) - A demarc (an abbreviation for demarcation point) marks the point where communications facilities owned by one organization interface with that of another organization.
  • DEN (Directory-Enabled Networking) - Directory-Enabled Networking (DEN) is an industry-standard initiative and specification for how to construct and store information about a network's users, applications, and data in a central directory.
  • digital audio broadcasting (DAB) - .
  • digital switch - A digital switch is a device that handles digital signals generated at or passed through a telephone company central office and forwards them across the company's backbone network.
  • direct broadcast satellite (DBS) - Direct broadcast satellite (DBS) refers to satellite television (TV) systems in which the subscribers, or end users, receive signals directly from geostationary satellites.
  • direct sequence spread spectrum (DSSS) or direct sequence code division multiple access (DS-CDMA) - Direct sequence spread spectrum, also known as direct sequence code division multiple access (DS-CDMA), is one of two approaches to spread spectrum modulation for digital signal transmission over the airwaves.
  • DirectAccess - DirectAccess is a feature introduced in Windows Server 2008 R2 and Windows 7 that uses automated IPv6 and IPSec tunnels to allow remote users to access private network resources whenever they are connected to the Internet.
  • directional antenna - A directional antenna is a radio-frequency (RF) wireless antenna designed to function more effectively in some directions than in others.
  • directional sound - Directional sound is a technology that concentrates acoustic energy into a narrow beam so that it can be projected to a discrete area, much as a laser focuses light.
  • discrete multitone (DMT) - Discrete multitone (DMT) is a method of separating a Digital Subscriber Line (DSL) signal so that the usable frequency range is separated into 256 frequency bands (or channels) of 4.
  • DSLAM (Digital Subscriber Line Access Multiplexer) - A DSLAM (Digital Subscriber Line Access Multiplexer) is a network device, usually at a telephone company central office, that receives signals from multiple customer Digital Subscriber Line (DSL) connections and puts the signals on a high-speed backbone line using multiplexing techniques.
  • DTTV (digital terrestrial television) - DTTV (digital terrestrial television, sometimes also abbreviated DTT) is digital television (DTV) broadcast entirely over earthbound circuits.
  • duplex - In telecommunication, duplex communication means that both ends of the communication can send and receive signals at the same time.
  • E.164 - E.164 is an international numbering plan for public telephone systems in which each assigned number contains a country code (CC), a national destination code (NDC), and a subscriber number (SN).
  • E911 (Enhanced 911) - In the United States, E911 (Enhanced 91 is support for wireless phone users who dial 911, the standard number for requesting help in an emergency.
  • ear and mouth (E&M) - Ear and mouth (E&M) is a technology in voice over IP (VoIP) that uses a traditional telephone handset with an earphone (or earpiece) for listening to incoming audio and a microphone (or mouthpiece) for transmitting audio.
  • EDIFACT - EDIFACT (ISO 9735) is the international standard for electronic data interchange (EDI).
  • electronic program guide (EPG) - An electronic program guide (EPG) is an application used with digital set-top boxes and newer television sets to list current and scheduled programs that are or will be available on each channel and a short summary or commentary for each program.
  • entropy - Entropy describes a process in which order deteriorates with the passage of time.
  • erbium amplifier - An erbium amplifier, also called optical amplifier or an erbium-doped fiber amplifier or EDFA, is an optical or IR repeater that amplifies a modulated laser beam directly, without opto-electronic and electro-optical conversion.
  • Ethernet as a service (EaaS) - Ethernet as a service (EaaS) is the use of high-bandwidth, fiber optic media such as Packet over SONET (PoS) to deliver 10 Mbps, 100 Mbps or even 1000 Mbps Ethernet service to one or more customers across a common bidirectional broadband infrastructure.
  • Ethernet point-of-presence (EPOP) - Ethernet point-of-presence (EPOP) is a technology developed by Level 3 Communications that provides widespread access to broadband networks.
  • failover - Failover is a backup operational mode in which the functions of a system component (such as a processor, server, network, or database, for example) are assumed by secondary system components when the primary component becomes unavailable through either failure or scheduled down time.
  • fax polling - Fax polling is a feature that allows one fax machine to send a request to another fax machine for a specific document.
  • FCoE (Fibre Channel over Ethernet) - FCoE (Fibre Channel over Ethernet) is a storage protocol that enable Fibre Channel communications to run directly over Ethernet.
  • FDDI (Fiber Distributed Data Interface) - FDDI (Fiber Distributed Data Interface) is a set of ANSI and ISO standards for data transmission on fiber optic lines in a local area network (LAN) that can extend in range up to 200 km (124 miles).
  • femtocell - A femtocell is a wireless access point that improves cellular reception inside a home or office building.
  • fiber optics (optical fiber) - Fiber optics, or optical fiber, refers to the medium and the technology associated with the transmission of information as light pulses along a glass or plastic strand or fiber.
  • fiber to the x (FTTx) - Fiber to the x (FTTx) is a collective term for various optical fiber delivery topologies that are categorized according to where the fiber terminates.
  • filter - In computer programming, a filter is a program or section of code that is designed to examine each input or output request for certain qualifying criteria and then process or forward it accordingly.
  • FiOS (Fiber Optic Service) - FiOS (Fiber Optic Service) is a fiber to the premises (FTTP) telecommunications service offered by Verizon to consumers in the United States.
  • firehose effect - A firehose effect occurs in a network when the source (transmitting) computer or terminal sends data too fast for a destination (receiving) computer or terminal to deal with it.
  • flow routing - Flow routing is a network routing technology that takes variations in the flow of data into account to increase routing efficiency.

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