| Abbreviation | Definition |
|---|---|
| TRE | Telecommunications Research Establishment |
| TRF | Transmit Reject Filter |
| TRMA | Telecommunications Risk Management Association |
| TRNA | Temporarily Restricted Net Asset |
| TRNB | Telecom Reporters Network Bangladesh |
| TRRF | Telecommunication Regulatory Recovery Fee |
| TRS | Telecom Relay Service |
| TRS | Telecommunications Relay Service |
| TRS | Telecommunications Relay Services |
| TRS | Trunked Radio System |
| TRX | Tandem Repeater eXchange |
| TS | Telecom Server |
| TS | Tip and Sleeve |
| TSA | Terminating Switched Access |
| TSAN | Telecommunication Students and Alumni Network |
| TSAP | Telecommunication Systems Analysis Position |
| TSAPI | Telephony Server Application Programming Interface |
| TSAR | Terminating Switched Access Rate |
| TSB | Telecommunication Standardization Bureau |
| TSB | Telecommunications Standardization Bureau |