| Abbreviation | Definition |
|---|---|
| ICLD | Inter-Channel Level Difference |
| ICNIRP | International Commission on Non-Ionizing Radiation Protection |
| IC-POT | Interexchange Carrier-Point Of Termination |
| ICR | Initial Cell Rate |
| ICSF | Internet Connection Sharing and Firewall |
| ICT | Information and Communication Technology |
| ICTA | Idaho Cable Telecommunications Association |
| ICTP | International Conference on Telecommunication and Photonics |
| IDC | Information Distribution Company |
| IDCP | Internet Device Control Protocol |
| IDD | International Direct Dialing |
| IDDD | International Direct Distance Dialing |
| IDF | Independent Distribution Facility |
| IDF | Independent Distribution Frame |
| IDLC | Integrated Digital Loop Carrier |
| IDM | Interim Data Modem |
| IDR | Installer Design Required |
| IDS | Information Directory Service |
| IDSL | ISDN (Integrated Services Digital Network) Digital Subscriber Line |
| IDT | Integrated Digital Terminal |