| Abbreviation | Definition |
|---|---|
| RHE | Regional Head-End |
| RI | Receiver Induced |
| RI | Remote Intersepter |
| RI | Ring In |
| RI | Ring Indicator |
| RIA | Referentie Interconnectie Aanbieding |
| RIC | Radiocommunications Information Circular |
| RICK | Repeater Interface Communications Kit |
| RIM | Remote Integrated Mulitplexor |
| RINO | Roaming International Network Operator |
| RIO | Reference Interconnection Offer |
| RIP | Referentne Interkonekcijske Ponude |
| RIPENCC | Reseaux IP Europeens Network Coordination Centre |
| RIPT | Realtime Internet Peering for Telephony |
| RITS | Residential Information Technology Services |
| RJ-14 | Registered Jack type 14 (2-wire connector) |
| RJ-25 | Registered Jack type 25 (6-wire connector) |
| RLA | Received Level Average |
| RLC | Radio Link Control |
| RLC | Reverse Link Channel |