I
- IAX (Inter-Asterisk eXchange)
- Identity Management
- IMAP (Internet Message Access Protocol)
- IMS (IP Multimedia Subsystem)
- Inbound Call (Chiamata in Entrata)
- Inbound Call Center
- Inbound Marketing
- Inbound Routing
- Instant Callback
- Instant Messaging (IM)
- Integrated Messaging
- Integration Testing
- Intelligent Network (IN)
- Interactive Call Distribution (ICD)
- Interactive Call Handling
- Interactive Call Statistics
- Interactive Voice Response (IVR)
- Intercom
- Interconnection
- Internal Call (Chiamata Interna)
- Intranet
- IP Address (Indirizzo IP)
- IP PBX (Centralino Telefonico IP)
- IP Phone (Telefono IP)
- IP Telephony (Telefonia IP)
- IP Trunking
- IPSec (Internet Protocol Security)
- ISDN (Integrated Services Digital Network)
- ISP (Internet Service Provider)
- ITU (International Telecommunication Union)
- IVR Menu
