| Abbreviation | Definition |
|---|---|
| HUMAN | High-speed Unlicensed Metropolitan Area Network |
| HUP | Hook-UP |
| HYTR | Hyderabad Telecom Region |
| i.LINK | IEEE 1394, High Performance Serial Bus, implementation |
| IAD | Integrated Access Device |
| IAMAI | Internet and Mobile Association of India |
| IAST | Industry Access Service Tariff |
| IAT | Integrated Access Terminal |
| IATA | Intelligent Agents For Telecommunication Applications |
| IAV | Images, Audio, Video |
| IBS | In-Building Solution |
| IBSS | Independent Basic Service Set |
| IC | Intermediate Cross-Connect |
| ICAL | Interexchange Carrier Access Line |
| ICC | Interexchange Carrier Charge |
| ICCF | Interexchange Carrier Compatibility Forum |
| ICCID | Integrated Circuit Card Identifier |
| ICE | Information Content Exchange |
| ICE | Integrated Communications Environment |
| ICL | Inserted Connection Loss |