| Abbreviation | Definition |
|---|---|
| TLETS | Texas Law Enforcement Telecommunication System |
| TLETS | Texas Law Enforcement Telecommunications System |
| TLF | Telecom Lifestyle Fashion |
| TLP | Transmission Level Point |
| TLPU | Telecommunications Line Protector Unit |
| TLR | Traffic Line Remover |
| TLS | Telephone Line Simulator |
| TLT | Test Loop Translator |
| TLWS | Trunk and Line Work Station |
| TLX | TELEX (TELegraph EXchange) |
| TMA | Telecommunication Managers Association |
| TMAB | Telecom Managers Association of Belgium |
| TMAP | Technical Management Assistance Programme |
| TMC | Time-slot Management Channel |
| TMD | Trunk Main Distributing |
| TME | Telocator Message Entry |
| TMF | TeleManagement Forum |
| TMG | Telecommunications Management Group |
| TMGB | Telecommunications Main Grounding Busbar |
| TMN | Telecommunication Management Network |