| Abbreviation | Definition |
|---|---|
| CPEI | Customer Premises Equipment Installer |
| CPEP | Corrected Platform Error Polling |
| CPIM | Converged Physical Infrastructure Management |
| CPIP | Carrier Pigeon Internet Protocol |
| CPM | Control Port Manager |
| CPN | Counterpropagation Network |
| CPOP | Circuit Precedence over Packet data |
| CPS | Common Portlet Services |
| CQ | Custom Queuing |
| CRANE | Common Reliable Accounting For Network Element |
| CRB | Call Record Buffer |
| CRB/M | Call Record Buffer with Modem |
| CREN | Corporation for Research and Educational Networking |
| CRIMP | Connectivity Routing And Infrastructure Management Programme |
| CRISP | Caching And Replication For Internet Service Performance |
| CRISP | Chartercross Registry Information Service Protocol |
| CRISP | Cross Registry Information Service Protocol |
| CRL | Critical Resource List |
| CRNC | Controlling Radio Network Controller |
| CRNP | Cluster Reconfiguration Notification Protocol |