| Abbreviation | Definition |
|---|---|
| TCCMS | Telecom Consumer Complaints Monitoring System (India) |
| TCCMS | Telecom Consumers Complaint Monitoring System |
| TCG | Telecom Consulting Group |
| TCIC | Trunk Circuit Identification Code |
| TCIYP | Turks and Caicos Islands Yellow Pages |
| TCM | Tandem Connection Maintenance |
| TCM | Trellis-Coded Modulation |
| TCMS | Trunked Code Management System |
| TCO | Telecommunications Contracting Office |
| TCO | Total Connection Operation |
| TCOE | Telecom Centre of Excellence |
| TCOE | Telecom Centres of Excellence |
| TCP | Telephone Connecting Program |
| TCP/IP | Transmission Control Protocol/Internet Protocol |
| TCPA | Telephone Consumer Protection Act |
| TCS | Telephony Control Specification |
| TCSO | Telco over Cloud Service Orchestrator |
| TCT | Tin Can Technology |
| TCTA | Tennessee Cable Telecommunications Association |
| TCTA | Texas Cable & Telecommunications Association |