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 - IEE

  • 10 Gigabit Ethernet (10 GbE) - 10 Gigabit Ethernet (10 GbE) 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.
  • 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.
  • 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.
  • 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.
  • backhaul - Backhaul, a term probably derived from the trucking industry, has several usages in information technology.
  • bandwidth (network bandwidth) - Network bandwidth is a measurement indicating the maximum capacity of a wired or wireless communications link to transmit data over a network connection in a given amount of time.
  • 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 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.
  • 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.
  • circuit - In electronics, a circuit is a path between two or more points along which an electrical current can be carried.
  • 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.
  • Complementary Code Keying (CCK) - Complementary Code Keying (CCK) is a modulation scheme used with wireless networks (WLANs) that employ the IEEE 802.
  • 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 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.
  • 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.
  • 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.
  • 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.
  • 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 (FC) 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).
  • 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.
  • flow routing - Flow routing is a network routing technology that takes variations in the flow of data into account to increase routing efficiency.
  • forward error correction (FEC) - Forward error correction (FEC) is a method of obtaining error control in data transmission in which the source (transmitter) sends redundant data and the destination (receiver) recognizes only the portion of the data that contains no apparent errors.
  • frame - See frames for the use of multiple Web pages on a single display screen.
  • free-space optics (FSO) - Free-space optics (FSO), also called free-space photonics (FSP), refers to the transmission of modulated visible or infrared (IR) beams through the atmosphere to obtain broadband communications.
  • frequency-shift keying (FSK) - Frequency-shift keying (FSK) is a method of transmitting digital signals.
  • FTP (File Transfer Protocol) - FTP (File Transfer Protocol) is a network protocol for transmitting files between computers over TCP/IP connections.
  • Gbps (billions of bits per second) - Gbps stands for billions of bits per second and is a measure of bandwidth on a digital data transmission medium such as optical fiber.
  • GeoRSS - GeoRSS is a method of describing and pinpointing the physical locations of Internet content.
  • geostationary satellite - A geostationary satellite is an earth-orbiting satellite, placed at an altitude of approximately 35,800 kilometers (22,300 miles) directly over the equator, that revolves in the same direction the earth rotates (west to east).
  • gigabit interface converter (GBIC) - A gigabit interface converter (GBIC) is a transceiver that converts electric currents (digital highs and lows) to optical signals, and optical signals to digital electric currents.
  • gigaflop - As a measure of computer speed, a gigaflop is a billion floating-point operations per second (FLOPS).
  • hairpinning - In general telecommunication, hairpinning is returning a message from an origin endpoint back in the direction it came from as a way to get it to its destination endpoint.
  • half-duplex - Half-duplex data transmission means that data can be transmitted in both directions on a signal carrier, but not at the same time.
  • HALO (High Altitude Long Operation) - A HALO (High Altitude Long Operation) aircraft is an aircraft designed to act as a very high altitude receiving and transmitting tower, circling a metropolitan area and providing broadband telecommunication service at data rates up to 5 Mbps to homes and up to 25 Mbps to business users with dedicated lines.
  • HDLC (High-level Data Link Control) - HDLC (High-level Data Link Control) is a group of protocols or rules for transmitting data between network points (sometimes called nodes).
  • hoot-n-holler - In telecommunications, a hoot-n-holler is a dedicated "always on" connection used for two-way business-to-business voice communication.
  • hop off - Hop off is a term used in telecommunications that refers to a point at which a signal or call leaves a network and moves to another network.
  • HTTP (Hypertext Transfer Protocol) - HTTP (Hypertext Transfer Protocol) is the set of rules for transferring files -- such as text, images, sound, video and other multimedia files -- over the web.
  • HTTP/2 protocol - HTTP/2 protocol is the second version of HTTP, a network protocol used to define the format and transmission of data.
  • hundred call second or centum call second (CCS) - The hundred call second -- also known as the centum call second (CCS) -- is a unit of telecommunications traffic density that is the equivalent of one call (including call attempts and holding time) in a specific channel for 100 seconds in an hour.
  • hybrid WAN - A hybrid WAN is a wide area network that sends traffic over two or more connection types.
  • IAX (Inter-Asterisk Exchange Protocol) - IAX (Inter-Asterisk Exchange Protocol, pronounced "eeks") is a communications protocol for setting up interactive user sessions.
  • IEEE 802.3 - 802.3, or IEEE 802.
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