H
- H.248 (Megaco)
- H.264
- H.265 (HEVC)
- H.323
- Hand Over
- Handoff (Passaggio di Chiamata)
- Handoff Delay
- Handset (Cornetta)
- Hard Phone
- Hardphone Configuration
- Hardware Echo Cancellation
- Header
- Headset
- Heterogeneous Network (HetNet)
- High Availability (Alta Disponibilità)
- High Definition (HD) Voice
- Hold (Attesa)
- Home Location Register (HLR)
- Hook Flash
- Hosted PBX
- Hot Desking
- Hot Plugging
- Hotline
- HTTP (Hypertext Transfer Protocol)
- HTTPS (Hypertext Transfer Protocol Secure)
- Hunt Group (Gruppo di Ricerca)
- Hunt Group Strategy
- Hybrid PBX
- Hypervisor
