Here are the most common telecom acronyms starting with T from the world of computer networking.
← Back to Full Telecom Acronyms| T&I | Testing and Integration |
| T&M | Time and Material |
| T&R | Tip and Ring (the two local telephone wires) |
| T/DC | Tape/Disk Cabinet |
| T/P | Transaction Processing |
| T/S | Interface |
| T1 | 1.544 Mbps, 24 channels (equivalent to DS1) |
| T1C | 3.152 Mbps, 48 channels (equivalent to DS1C or two DS1s) |
| T1FAC | T1 Facility |
| T2 | 6.312 Mbps, 96 channels (equivalent to DS2 or four DS1s) |
| T-2009 | Basic ISDN set |
| T-2112 | ISDN 12-button set |
| T-2317 | ISDN 16-button set |
| T3 | 44.736 Mbps, 672 channels (equivalent to DS3 or 28 DS1s) |
| T-3000 | ISDN digital telephone |
| T3C | 90 Mbps, 1344 channels (equivalent to DS3C or two DS3s) |
| T3D | 135 Mbps, 2016 channels (equivalent to DS3D or three DS3s) |
| T3E | 180 Mbps, 2688 channels (equivalent to DS3E or four DS3s) |
| T4 | 274 Mbps, 4032 channels (equivalent to DS4 or six DS3s) |
| TA | Terminal Adaptor (card) (AT&T) |
| TA | Trouble Aids |
| TAC | Technical Advisory Center |
| TAC | Telenet Access Controller |
| TAC | Test Access Circuit |
| TAC | Trunk Access Control |
| TACS | Total Access Communications System |
| TADIL | Tactical Digital Information Link |
| TADSS | Tactical Automatic Digital Switching System |
| TAFAS | Trunk Answer From Any Station |
| TAL | Tandem Application Language |
| TAMS | Technical and Management Services |
| TAMS | Telenet Access Management System |
| TAN | Test Access Network |
| TAP | T1 Access Partitioning |
| TAP | Total Assets Protection |
| TAPA | Total Army Personnel Agency |
| TARGA | Truevision Advanced Raster Graphics Adapter |
| TAS | Technical Assistance Service (Northern Telecom Inc.) |
| TAS | Telephone Answering Service |
| TAS | Test Access Slot |
| TASC | Technical Assistance Service Center |
| TASC | Telecommunications Alarm Surveillance and Control System |
| TASI | Time Assignment Speech Interpolation |
| TASTE | Trunks, Access, Switch and Transmission Evaluator |
| TAT | Transatlantic cable |
| TAU | Test Access Unit |
| TAU | Trunk Access Unit |
| TAXIR | Taxonomic Information Retrieval |
| TBA | To Be Assigned |
| TBCC | Test Bus Control Circuit |
| TBCU | Test Bus Control Unit |
| TBD | To Be Decided |
| TBD | To Be Determined |
| TBM | Terabit Memory |
| TBS | The Billing Solution |
| TBS | To Be Supplied |
| TC | Technical Control |
| TC | Telecommunications |
| TC | Terminal Controller (Northern Telecom Inc. DMS-100) |
| TC | Test Code (card) |
| TC | Toll Center |
| TC | Transaction Capabilities |
| TC | Transaction Capability |
| TC | Trunk Concentrator |
| TC | Type Cabinet |
| TCAM | Telecommunications Access Methods |
| TCAP | Transaction Capabilities |
| TCAP | Transaction Capability Application Part (SS7) |
| T-carrier | Hierarchy of digital systems designed to carry speech and other signals in digital form |
| TCAS | T-carrier Administration System (database) |
| TCBH | Time-Consistent Busy Hour |
| TCI | Telephone Circuit Inventory |
| TCM | Time Compression Multiplex |
| TCM | Traveling Class Mark |
| TCMS | Telecommunications Control Management System (Astra-TCMS Computer system) |
| TCN | Travel Card Number |
| TCO | Targeted Calling Option |
| TCO | Telenet Central Office |
| TCOS | Traveling Class of Service |
| TCP | Transfer Control Protocol |
| TCP/IP | Transmission Control Protocol/Internet Protocol |
| TCR | Transaction Confirmation Report |
| TCRS | Tax Calculation & Reporting System |
| TCS | Table Control System |
| TCT | Tandem Connecting Trunk |
| TCVXO | Temperature Compensated/Voltage controlled Crystal Oscillator |
| TD | Tone Decoder |
| TD | Transmitter-Distributor |
| TD&EO | Test Data & Expected Outcome |
| TDA | Traffic Data Analysis (Suntel C3 computer subsystem) |
| TDB | Terminal Descriptor Block |
| TDM | Time Division Multiplexing |
| TDM | Trunk Data Module |
| TDMA | Time Division Multiple Access |
| TDN | Time Division Network |
| TDN | Toll Denied |
| TDR | Time Division Reflectometer |
| TDS | Traffic Data Studies System |
| TDS | Training Course Development Standard |
| T-DSL | T Digital Subscriber Loop |
| TDSU | T1 Digital Service Unit |
| TDT | Telenet Diagnostic Tool |
| TDT2 | Telenet Diagnostic Tool 2 |
| TDV | Toll Diversion |
| TE mode | Transverse Electric mode |
| TE1 | Terminal Equipment Type 1 |
| TE2 | Terminal Equipment Type 2 |
| TEHO | Tail End Hop Off |
| TEI | Terminal Endpoint Identifier |
| TELECOM | Telecommunications services (or equipment) |
| TEM mode | Transverse Electromagnetic mode |
| TEMPEST | Electronic Emissions Security |
| TEMPO | Telecommunications Modernization Project (Pentagon) |
| TES | Toll Essential Service |
| TF | Trunk Frame |
| TFPC | Toll Fraud Prevention Committee |
| TFS | Traffic Subsystem |
| TFTP | Trivial File Transfer Protocol |
| TG | Trunk Group |
| TG5 | Translation Guide 5ESS |
| TGIN | Trunk Group Information |
| THIS | Trouble Handling Information System |
| TI | Texas Instruments |
| TI | Trouble Indicators |
| TIA | Technical Information Agreement |
| TIAC | Telecommunications Industry Advisory Committee (California) |
| TIAS | Telephone Inventory and Accounting System |
| TIC | Telephone Interface Card |
| TICCIT | Time-Shared Interactive Computer-Controlled Informational Television |
| TIE | Terminal Interface Equipment |
| TIES | Total Integrated Engineering System |
| TIF | Tandem Interface Frame |
| TIF | Telephone Interference Factor |
| TIF | Terminal Interface |
| TIFF | Tagged Image File Format |
| TIMS | Treasury Information Management System |
| TINP | Telenet Internal Network Protocol |
| TIP | Technical Information Paper |
| TIP | Terminal Interface Processor (or Terminal Interface Message Processor) |
| TIR | Total Internal Reflection |
| TIR | Trouble Incident Report |
| TIRKS | Telecommunications Interoffice Network WMQem |
| TIU | Terminal Interface Unit |
| TIU | Test Interface Unit |
| TIV | Test Integration/Validation |
| TL | Transmission Level |
| TLC | T-Interface Line Card |
| TLM | Trouble Locating Manual |
| TLN | Trunk Line Network |
| TLP | Transmission (Test) Level Point |
| TLP | Trouble Locating Process (or Procedure) |
| TLSI | Toll Loop Supervision Incoming |
| TLSO | Toll Loop Supervision Outgoing |
| TLWS | Trunk and Line Work Station |
| TM | Terminal Maintenance |
| TM | Traffic Measurement |
| TM | Trunk Module |
| TM – MTA | Telemail – Message Transfer Agent |
| TM mode | Transverse Magnetic mode |
| TMC | Telemarketing Center |
| TMC | The Meeting Channel (P) |
| TMCU | Time Multiplexed Control Unit |
| TMDSE | Test Measurement Diagnostic and Simulation Equipment |
| TME | Trunk Maintenance Equipment |
| TME | Trunk Module Equipment |
| TML | Tandem Matching Loss (Northern Telecom Inc. DMS) |
| TML | Terminating Matching Loss |
| TM-LC | Telemail – Local Community |
| TMR | Triple Modular Redundancy |
| TMRS | Traffic Measurement and Recording System |
| TMRS | Traffic Measurement and Recording System |
| TMS | Telecommunications Management Center |
| TMS | Testbed Management System |
| TMS | Time Multiplexed Switch |
| TMS | Translations Management System |
| TMS | Transmission Management System |
| TMS | Trouble Management System |
| TMS | Trunk Monitor System |
| TMS2 | Time Multiplexed Switch – Model 2 |
| TMSU | Time Multiplexed Switch Unit |
| TMSU2 | Time Multiplexed Switch Unit – Model 2 |
| TMT | Transmission Maintenance Terminal |
| TNDS | T1 Network Diagnostic System |
| TNDS | Total Network Data System |
| TNIC | Transit Network Identifier Code |
| TNMS | Transmission Network Management System |
| TNP | Toll Network Protection |
| TNT | Tools and Techniques for Supervisors |
| TOC | Technical Operations Center |
| TOC | Technical Oversight Center |
| TOD | Time of Day |
| TODS | Transactions on Database Systems |
| TOE | Total Operating Expense |
| TOMS | Transactions on Mathematical Software |
| TOP | Task Oriented Practice |
| TOP | Technical Office Protocol |
| TOPES | Telephone Office Planning and Engineering System |
| TOPLAS | Transactions on Programming Languages and Systems |
| TOPP | Task Oriented Plant Practice |
| TOPS | Traffic Operator Position System |
| TOPS | Travel Card Operator Services Core Team |
| TORP | Trunk Outage Results Plan |
| TOS | Trunk Out of Service |
| TP | Telenet Processor |
| TP | Toll point |
| TP3 | Telenet Product |
| TP4 | Telenet Product |
| TPAM | Teleprocessing Access Methods |
| TPART | Terminating Partition |
| TPD | Test Plan Development |
| TPDIR | Telenet Processor Directory |
| TPDU | Transport Protocol Data Unit |
| TPNS | Transaction Processing Network Services |
| TPOS | Telenet Processor Operating System |
| TPP | Technical Practice and Procedure |
| TPRF | Telenet Processor Reporting Facility |
| TPVM | Telephony Peripheral Virtual Machine |
| TQA | Total Quality Assurance |
| TQM | Total Quality Management |
| TRA | Travel Request Authorization |
| TRACS | Test Repair Analysis Control System (MFG) |
| TRC | Terminating Restriction Codes |
| TRCU | Transmission Rate Converter Unit |
| TRF | Territory Reassignment Forms |
| TRIM | Trouble Report Improvement Methodology |
| TRIS | Trouble Reporting Information System |
| TRK | Trunk |
| TRL | Transistor Resistor Logic |
| TRM | Two Mile Optical Remote Switching Module |
| TRMS | Trouble Report Management Service |
| TROC | Trouble Reporting Operations Center |
| TRPS | Total Recovery Planning System |
| TRS | Tax Reporting System |
| TRS | Total Requirements Statement (core teams) |
| TRS | Trouble Reporting System |
| TRS | Trouble Reporting System |
| TRUMP | Trunk Maintenance Program (or Package) |
| TSAP | Transport Service Access Point |
| TSB | Time Switch Broadcasting |
| TSC | Technical Service Coordinator |
| TSCO | Telecommunications Service Control Officer |
| TSD | Technical Service Document |
| TSF | Trunk Switch Frame |
| TSG | Technical Support Group |
| TSG | Telephone Security Group |
| TSI | Time Slot Interchanger |
| TSIU | Time Slot Interchange Unit |
| TSIU2 | Time Slot Interchange Unit – Model 2 |
| TSMS | Traffic Separations Measurement System |
| TSO | Technical Services Organization |
| TSO | Time Share Option |
| TSO | Time Share Organization |
| TSP | Telecommunications Service Policy |
| TSP | Telecommunications Service Proprietary (system) (AT&T) |
| TSP | Telecommunications System Priority |
| TSP | Teleprocessing Services Program – Remote Computation |
| TSPS | Traffic Service Position System |
| TSS | Technical Support Specialists |
| TSS | Time-Shared System |
| TSS | Transmission Surveillance System |
| TSSSST | Time, Space, 2-Stage Space, Space, Time (switching network) |
| T-S-T | Time-Space-Time (switching) |
| TT | Touch-tone |
| TT | Trouble Ticket |
| TTC | Test Trunk Circuit |
| TTC | Trunk Test Center |
| TTF | Transmission Test Facility |
| TTF | Transmission Test Function |
| TTF | Trunk Test Facility |
| TTI | Telcommunication Technology, Inc. |
| TTL | Transistor-Transistor Logic |
| TTMS | Trouble Ticket Management System |
| TTP | Trunk Test Point |
| TTS | Tape Tracking System |
| TTS | Trouble Tracking System |
| TTT | Transmission Test Trunk |
| TTTN | Tandem Tie Trunk Network |
| TTU | Transmission Test Unit |
| TTY | Teletype |
| TTY | Teletypewriter |
| TTYC | Teletypewriter Controller |
| TU | Trunk Unit |
| TUCA | Tape Cabinet |
| TUPLE | Table Update Line Entry |
| TUR | Traffic Usage Recorder |
| TUR | Trunk Utilization Report |
| TUR | Trunk Utilization Report |
| TVC | Trunk Verification by Customer |
| TVRO | Television Receive Only |
| TWA | Two-Way Alternate |
| TWC | Three-way Calling |
| TWT | Traveling Wave Tube |
| TWX | Teletypewriter Exchange service |
| TX | 405 Mbps, 6048 channels (equivalent to nine DS3s) |
| TX | 560 Mbps, 8064 channels (equivalent to 12 DS3s) |
