IHM Direct VoIP is a radio communication system that uses LAN, WAN, or the internet as its infrastructure.

The system simplifies Radio over IP by enabling direct voice transmission (Direct Voice) across IP connections. Up to four TE10-39/3 dispatch terminals can be connected to four radio base stations, each linked to the IP network through a COM53 Base Station Controller.

Because the system uses static IP addresses, it does not require a separate communication switch or gatekeeper PC. This keeps installation simple while still supporting advanced communication features.

• Direct Voice over IP communication (VoIP/RoIP)
• Supports up to 4 dispatch terminals (TE10-39/3)
• Supports up to 4 radio base stations via COM53 controllers
• No need for a separate communication switch or gatekeeper PC
• Stable operation through static IP addressing
• Uses UDP protocol for high audio quality, link supervision, and radio signalling
• Protected against unauthorised access and virus attacks Infrastructure: LAN / WAN / Internet

• Configuration: 4 dispatch terminals + 4 radio base stations
• Base Station Controller: COM53
• Protocol: UDP (for audio, control signals, and radio signalling)
• IP Configuration: Static IP addresses
• Requirements: No communication switch or gatekeeper PC