T - Definitions

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  • T

    T-carrier system

    To see the relationship between T-carrier, E-carrier, and DS0 multiples, see digital signal X. The T-carrier system, introduced by the Bell System in the U.S. in the 1960s, was the first successful system that supported digitized voice transmission.

  • T1 (T-1)

    Also see the T-carrier system, of which the T1 is a part.

  • TCP (Transmission Control Protocol)

    TCP (Transmission Control Protocol) is a standard that defines how to establish and maintain a network conversation through which application programs can exchange data.

  • TCP/IP (Transmission Control Protocol/Internet Protocol)

    TCP/IP, or the Transmission Control Protocol/Internet Protocol, is a suite of communication protocols used to interconnect network devices on the internet.

  • TCP/IP offload engine (TOE)

    The TCP/IP offload engine (TOE for short) is a technology that is gaining popularity in high-speed Ethernet systems for the purpose of optimizing throughput.

  • TDMA (time division multiple access)

    TDMA (time division multiple access) is a technology used in digital cellular telephone communication that divides each cellular channel into three time slots in order to increase the amount of data that can be carried. (Continued...)

  • Technical Office Protocol (TOP)

    Technical Office Protocol (TOP), also called Technical and Office Protocol, is a set of protocols intended for networks that perform distributed information processing in business offices... (Continued)

  • telco (telephone company)

    In the United States and possibly other countries, "telco" is a short form for telephone company.

  • telecenter

    A telecenter (US spelling) or telecentre (UK spelling) is a work location usually in a different place than the organization's main office that provides convenient occasional access for telecommuting to work equipment that they don't have at home or on the road.

  • telecom carrier

    A telecom carrier is a company that is authorized by regulatory agencies to operate a telecommunications system.

  • telecom cloud provider

    A telecom cloud provider is a telecommunications company that has shifted a significant part of its business from landline service to devote resources to providing cloud services.

  • telecommunications (telecom)

    Telecommunications is the transmission of data, voice and video over significant distances by electronic means that use a wide variety of networks and media.

  • Telecommunications Act of 1996

    The Telecommunications Act of 1996, enacted by the U.S. Congress on February 1, 1996, and signed into law by President Bill Clinton on February 8, 1996, provided major changes in laws affecting cable TV, telecommunications, and the Internet.

  • Telecommunications Display Device (TDD)

    A Telecommunications Display Device (TDD), also known as a text telephone, is a telephone equipped with a keyboard and a display for people who are hearing- or speech-impaired.

  • telematics

    Telematics uses GPS and mobile devices to send and receive information that helps control remote objects, primarily in the automotive industry.

  • telephone jacks

    In the U. S., telephone jacks are also known as registered jacks, sometimes described as RJ-XX, and are a series of telephone connection interfaces (receptacle and plug) that are registered with the U.S. Federal Communications Commission (FCC).

  • teleportation

    Teleportation is the duplication or re-creation of physical objects or their properties using light beams, according to researchers at the California Institute of Technology.

  • Telnet

    Telnet is a network protocol used to virtually access a computer and to provide a two-way, collaborative and text-based communication channel between two machines.

  • terahertz (THz)

    The terahertz, abbreviated THz, is a unit of electromagnetic (EM) wave frequency equal to one trillion hertz (1012 Hz).

  • terbo

    The suffix terbo appears in the V.32terbo modem protocol and indicates the third version of the V.32 protocol.

  • terminal

    In data communications, a terminal is any device that terminates one end (sender or receiver) of a communicated signal.

  • terminal adapter (TA)

    A terminal adapter (TA) is a hardware interface between a computer and an Integrated Services Digital Network line.

  • terminal emulation

    Terminal emulation is the ability to make one computer terminal, typically a PC, appear to look like another, usually older type of terminal so that a user can access programs originally written to communicate with the other terminal type.

  • terminal proxy server (TPS)

    A terminal proxy server (TPS) is a program that acts as an interface for voice over Internet Protocol (VoIP) telephone sets... (Continued)

  • ternary content-addressable memory (TCAM)

    Ternary content-addressable memory (TCAM) is a specialized type of high-speed memory that searches its entire contents in a single clock cycle, with the term “ternary” referring to its ability to store and query data using three different inputs: 0, 1 and X.

  • text on nine keys (T9)

    Text on nine keys (T9) is a system that lets fixed and mobile phone users send text messages by pressing a number key for each letter in the message -- effectively making a keyboard out of the nine numeric phone entry keys.

  • thermoelectric cooling

    Thermoelectric cooling is a way to remove thermal energy from a medium, device or component by applying a voltage of constant polarity to a junction between dissimilar electrical conductors or semiconductors...(continued)

  • thin client (lean client)

    A thin client, sometimes called a lean client, is a low-cost, centrally-managed computer that relies heavily on a server for its computational role.

  • Thinnet

    Thicknet and Thinnet (sometimes called ThickWire and ThinWire) are commonly used terms for the larger and smaller size of coaxial cable used in Ethernet local area networks.

  • throttled data transfer

    Throttled data transfer, also known as data transfer throttling or lean data transfer, is the deliberate regulation of the data transfer rate in a communications system... (Continued)

  • throughput

    Throughput is a term used in information technology that indicates how many units of information can be processed in a set amount of time.

  • time-to-live (TTL)

    Time-to-live (TTL) is a value in an Internet Protocol (IP) packet that tells a network router whether or not the packet has been in the network too long and should be discarded.

  • token ring

    A token ring network connects computers in a ring or star topology to prevent the collision of data between two computers sending messages simultaneously.

  • top-of-rack switching

    Top-of-rack switching refers to a distributed data center architecture where one or more Ethernet switches is installed in a rack, then uplinked using high-bandwidth fiber optic connections to a central, high-density distribution point.

  • Toslink

    Toslink is a connector format for fiber optic digital audio cables.

  • TP0-TP4 (transport protocols 0 to 4)

    TP0-TP4 (transport protocols 0 to 4) are the five protocols in the Transport layer of the Open Systems Interconnection (OSI) model for telecommunication.

  • traffic engineering

    Traffic engineering is a method of optimizing the performance of a telecommunications network by dynamically analyzing, predicting and regulating the behavior of data transmitted over that network... (Continued)

  • traffic shaping

    Traffic shaping, also known as packet shaping, is a congestion management method that regulates network data transfer by delaying the flow of less important or less desired packets.

  • transactional e-mail

    Transactional e-mail is a type of Web-based marketing in which e-mail recipients can buy goods and services directly from an e-mail message, without being redirected to the retailer's Web site.

  • transceiver

    A transceiver is a combination transmitter/receiver in a single package.

  • transit

    Transit is the connection to and use of a telecommunication path provided by a vendor.

  • Transmeta

    Transmeta is a Silicon Valley start-up company known for its recruitment of high profile talent and its Crusoe chip, designed for mobile Internet computing.

  • transparent addressing

    On a wide area network (WAN), transparent addressing is a method of network addressing in which all intermediate node addresses are spoofed, so the client and server see each other's addresses and port configurations as if there were no intermediate nodes.

  • Transparent Interconnection of Lots of Links (TRILL)

    Transparent Interconnection of Lots of Links (TRILL) is the Internet Engineering Task Force’s specification for enabling multi-pathing in the data center. The protocol is intended to replace the spanning tree protocol.

  • transport layer

    Positioned at Layer 4 of the Open Systems Interconnection (OSI) communications model, the transport layer ensures the reliable arrival of messages across a network and provides error-checking mechanisms and data flow controls.

  • Transport Services Access Point (TSAP)

    A Transport Services Access Point (TSAP) is an end-point for communication between the Transport layer (layer 4) and the Session layer in the OSI (Open Systems Interconnection) reference model.

  • Traversal Using Relay NAT (TURN)

    Traversal Using Relay NAT (TURN) is a protocol, currently at the working draft stage, that is intended to govern the reception of data over a Transmission Control Protocol (TCP) or User Datagram Protocol (UDP) connection by a single communications device operating behind a Network Address Translator (NAT) or firewall... (Continued)

  • tree network

    In telecommunication networks, a tree network is a combination of two or more star networks connected together.

  • Trema

    Trema is an open source framework for developing OpenFlow controllers for software-defined networking in the Ruby and C programming languages.

  • triangulation

    Triangulation is a process by which the location of a radio transmitter can be determined by measuring either the radial distance, or the direction, of the received signal from two or three different points.

  • triple-play network

    A triple-play network is one in which voice, video and data are all provided in a single access subscription... (Continued)

  • triplecast

    A triplecast (TM) is the simultaneous broadcast of a program on television, radio, and an Internet site or channel.

  • tru2way

    Tru2way is the trade name for a technology that facilitates interactive TV and the convergence of digital television (DTV) with other communications devices... (Continued)

  • trunk

    A trunk is a physical path or link in a communications system that interconnects major switching centers or nodes and is designed to handle many transmissions simultaneously.

  • Turtle Firewall

    Turtle Firewall is an open source firewall program written in Perl that supports Linux Kernels 2.4.x and iptables. Turtle Firewall was written by Andrea Frigido of Frisoft, and is available under the GNU Public License (GPL) .

  • twinaxial cable

    Twinaxial cable is coaxial cable that contains two inner conducting wires rather than one.

  • two-tiered Internet

    Two-tiered Internet refers to proposed changes in Internet architecture that would give priority to the traffic of those who have paid for premium service.

  • two-way server

    A two-way server is a server that incorporates a multi-core processor for increased performance... (Continued)

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