| Abbreviation | Definition |
|---|---|
| COMS | Cambridge Open Mobile System |
| COPS | Caring Operators Personal Service |
| COR | Carrier Operated Relay |
| COT | Central Office Terminal |
| COTP | Communication On The Pause |
| CP | Call Processing |
| CP | Cell Phone |
| CP | Charging Party |
| CP | Customer Premises |
| CPC | Calling Party Control |
| CPC | Continous Packet Compression |
| CPC | Crosstalk Prevention Coding |
| CPEB | Channel Partner Enablement Briefing |
| CPG | Converged Packet Gateway |
| CPI | Computer-PBX Interface |
| CPIC | Cost Per Inbound Call |
| CPN | Calling Party Number |
| CP-OFDM | Cyclic Prefix Orthogonal Frequency Division Multiplexing |
| CPP | Calling Party Pays |
| CPS | Carrier Pre-Select |