| Abbreviation | Definition |
|---|---|
| OTA | Over The Air |
| OTACS | Over The Air Channel Steering |
| OTAM | Outsourcing and Telecommunications Association of Mauritius |
| OTAP | Oregon Telecommunications Assistance Program |
| OTAPA | Over-The-Air Parameter Administration |
| OTASP | Over-The-Air Service Provisioning |
| OTC | One-Time Charge |
| OTC | Operating Telephone Company |
| OTDR | Optical Time Domain Reflectometer |
| OTI | Open Telecom Infrastructure |
| OTM | Optical Transport Module |
| OTOC | Orion Telecomm Operating Corporation |
| OTP | On The Premises |
| OTP | Open Telecom Platform |
| OTS | Office of Telecommunication Services |
| OTS | Office of Telecommunications Services |
| OTSO | Office of Telecommunications and Systems Operations |
| OTSS | Operational Telecommunications Switching System |
| OTT | Over The Top |
| OTVA | Overseas Telecommunications Veterans Association |