T
 | TA Terminal Adapter Equivalent to a modem to ISDN network
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| TAD Technical Audio Device
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| TAE Terminal Adapter Equipment
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| TAMI Television Accessory Manufacturers Institute
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| TAPI Telephony Application Program Interface
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| TASO Television Allocation Study Organisation
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| TAT Theoretical Arrival Time
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| TB Terra Bytes One Million Million Bytes
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| TBD To Be Defined
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| TC Transmission Convergence
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| TC Test Control
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| TCA Target Channel Adapter
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| TCC Telephone Coordinating Circuit
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| TCI Test Control Interface
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| TCM Trellis Coded Modulation
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| TCO Total Cost of Ownership Model made famous by the Gartner Group
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| TCP Transmission Control Protocol
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| TCP/IP Transmission Control Protocol/Internet Protocol A set of layered protocols that enables shared applications among PCs, hosts, or workstations in a high speed communications environment.
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| TCS Telephony Control Specification
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| TD Transmitted Data
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| TDD Telecommunications Device for the Deaf
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| TDD Time Division Duplex
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| TDM Time Division Multiplexing
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| TDMA Time Division Multiple Access Increases the efficiency of a network by allowing a greater number of simultaneous transmissions
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| TDR Time Domain Reflectometer
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| TDT Transponder Data Table
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| TELNET TELecommunications NETwork protocol
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| TFT Thin Film Transistor A technology used in the production of laptop screens
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| TFTP Trivial File Transfer Protocol
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| TIC Token ring Interface Coupler
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| TIFF Tagged Image File Format One of the most widely supported file formats for storing bit-mapped images on PCs.
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| TIG Topology Information Group
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| TL Transaction Language
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| TLA Three Letter Abbreviation An acronym
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| TLS Transport Level Security
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| TLV Tag Length Value
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| TMK Terminal Master Key A terminal resident DES master key used for encrypting data keys used by the terminal
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| TMN Telecommunications Management Network
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| TNT Transponder Name Table
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| TOS Type Of Service
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| TOV Threshold Of Visibility
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| TP Transaction Processing
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| TPK Terminal PIN Key Used for encrypting PINs in outgoing messages
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| TR Technical Reference
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| TS Transport Stream
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| TSAP Transport Service Access Point
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| TSAPI Telephony Services Application Program Interface
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| TSI Transmitting Subscriber Line
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| TSI Time Slot Interchange
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| TSR Terminate Stay Ready
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| TTL Transistor Transistor Logic
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| TTP Tiny Transport Protocol
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| TTP Trusted Third Party
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| TTW TeleType Writer Used to be used as an input / outpu device to mainframe computers. Forerunner to the console
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| TUC Total User Cell
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| TUCD Total User Cell Difference
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| TUI Telephony User Interface
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| TX Transmit
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