| Abbreviation | Definition |
|---|---|
| TMN | Telecommunications Management Network |
| TMO | Telecommunications Management Officer |
| TMOD | Telecommunications and Mission Operations Directorate |
| TMRS | Traffic Measurement and Recording System |
| TMSI | Temporary Mobile Subscriber Identity |
| TMT | Technology Media and Telecommunications |
| TMT | Technology Media Telecommunications |
| TN | Telephone Number |
| TNI | Telephone Network Interface |
| TNMS | Telecommunications Network Management System |
| TNS | Telecommunications Network Services |
| TNS | Telephone Notification System |
| TNS | Terminating Noncritical Section |
| TNS | Time to Next Send |
| TNSS | Telecom Network Services and Solutions |
| TNYWR | The Number You Will Receive |
| TOC | Telco Over Cloud |
| TOC | Telecommunication Operations Center |
| TOC | Telecommunications Outdoor Connectors |
| TOH | Transport OverHead |