| Abbreviation | Definition |
|---|---|
| DTAU | Digital Test Access Unit |
| DTC | Department of Telecommunications and Cable |
| DTF | Dial Tone First |
| DTF | Digital Transformation Force |
| DTF | Digital Transmission Facility |
| DTI | Digital Trunk Interface |
| DTIS | Department Of Telecommunications And Information Services |
| DTIS | Department of Telecommunications and Information Services |
| DTIS | Department Of Telecommunications Information Services |
| DTL | Defense Telephone Link |
| DTMF | Dual-Tone Multi-Frequency |
| DTPL | Distance Telecom Private limited |
| DTPS | Department of Telecommunications and Postal Services |
| DTS | Data Telecom Support |
| DTS | Digital Terminal System |
| DTU | Data Terminal Unit |
| DTX | Discontinuous Transmission |
| DUC | Designated Underlying Carrier |
| DUC | Digital Up-Converter |
| DUL | Dial-Up List |