| Abbreviation | Definition |
|---|---|
| CCBS | Completion of Call to Busy Subscriber |
| CCC | Clear Channel Capability |
| CCEA | Cross Connect Equipment Assignment |
| CCH | Common CHannel |
| CCIR | Comittee Consultatif International Radiotelecommunique |
| CCITT | Comite Consultatif International Telegraphique et Telephonique (now ITU-T) |
| CCITT | Communication Club for International Talk and Travel |
| CCITT | Consultative Commitee for International Telephony and Telegraphy |
| CCITT | Consultative Committee for International Telephony and Telegraphy |
| CCITT | Consultative Committee on International Telephony and Telegraph |
| CCM | Credit Card Machine |
| CCOFS | Colourless, Contentionless, Omni-directional and Flex Spectrum |
| CCR | Customer Controlled Reconfiguration |
| CCS | Call Center Service |
| CCS | Centa- (hundred) Call Seconds |
| CCSA | Common Control Switching Arrangement |
| CCSD | Cellular Circuit Switched Data |
| CCT | Call Centre Technology |
| CCTA | Cctacentral Computer And Telecommunications Agency |
| CCTI | Contact Center Technology Infrastructure |