Air traffic communications
We design, supply and install fully redundant, highly available voice communication control systems with every requested interface, for civil and defense aviation. A certified team delivers the system, trains operators and supports it 7/24.
- Voice communication control (VCCS)
- CrashPhone
- Operator consoles
- ATIS
- VHF / UHF radio systems
- Desktop & vehicle radios
- Radio controllers
- Digital recorders
Radio interfaceVoIP according to ED-137, parallel analogue and VoIP operation


Fig. 01Operator console and VCCS rack, partner equipment
Operator consoles
Controllers select radio frequencies, telephone lines and intercom from touch-panel positions in the tower.
Voice communication control system
The VCCS switches every radio and telephone line to the right controller. Osas implements fully redundant, highly available systems with every requested interface, for civil and defense aviation.
VHF / UHF radios
Ground radios carry air-ground voice to the aircraft. VoIP according to ED-137 links them to the VCCS, with analogue interfaces in parallel.
Digital recorder
Records every radio and telephone channel for replay and investigation.
CrashPhone
A dedicated line from the tower to airport rescue and firefighting services.
ATIS
Broadcasts current airfield information on its own frequency for arriving and departing aircraft.
































