| Abbreviation | Definition |
|---|---|
| DNR | Dial Number Recorder |
| DNY | Display NYX (Area Code) Routing |
| DOCSIS | Data Over Cable Service Interface Specification |
| DOD | Department Of Defense |
| DOD | Dial On Demand |
| DOD | Direct Outward Dialing |
| DOITT | Department of Information Technology and Telecommunications |
| DOITT | Department of Information Technology Telecommunications |
| DOR | Detailed Outage Report |
| DOrA | EV-DO (EVolution-Data Optimized) standard Revision A |
| DORK | Disciples Of The Righteous King |
| DOS | Data Over Signal |
| DOT | Department Of Telecom |
| DoT | Department of Telecommunications |
| DOV | Data Over Voice |
| DP | Dial Pulsing |
| DP | Drop Point |
| DPA | Distributed Power Architecture |
| DPBX | Digital Private Branch Exchange |
| DPCA | Displaced Phase Center Antenna |