| Abbreviation | Definition |
|---|---|
| RAU | Radio Access Unit |
| RAU | Residential Adaptor Unit |
| RB | Randomized Block |
| RB | Resource Bearer |
| RB | Reverse Billing |
| RBHC | Regional Bell Holding Company |
| RBT | Ring Back Tone |
| RC | Rating and Certification |
| RC | Rudy's Cellular |
| RCC | Radio Common Carrier |
| RCDD | Registered Communications Distribution Design |
| RCE | Region Code Enhancement |
| RCF | Remote Call Forwarding |
| RCMAC | Recent Change Memory Administration Center |
| RCMAG | Recent Change Memory Administration Group |
| RCMS | Recharge Card Management System |
| RCQS | Roaming Call Quality Sensor |
| RCS | Radio Cluster Server |
| RCS | Real Communication Solution |
| RCU | Remote Control Unit |