| Abbreviation | Definition |
|---|---|
| TPI | Tip-Party Identification |
| TPIS | Telecommunications Plant in Service |
| TPL | Telecom Power and Long |
| TPQ | Transmission Power Quality |
| TPRC | Telecommunications Policy Research Conference |
| TPS | Telephone Preference Service |
| TPS | Transmission Parameter Signalling |
| TPSN | Triple Play Subscriber Network |
| TPSP | Third Party Service Provider |
| TR | Telecommunication Room |
| TRA | Telecommunication Regulatory Authority |
| TRAC | Totally Reconfigurable Analog Circuit |
| TRAI | Telecom Reculatory Authority of India |
| TRAI | Telecom Regularity Authority of India |
| TRAI | Telecom Regulatory Authority of India |
| TRAI | Telecommunication Regulatory Authority of India |
| TRBR | Telecommunications Radiocommunications and Broadcasting Regulator |
| TRCSL | Telecommunications Regulatory Commission of Sri Lanka |
| TRD | Timed Release Disconnect |
| TRDF | Telecom Research and Development Fund |