The system has a base unit (the Master Control Unit or MCU), a secondary control unit (the Remote Control Unit or RCU) and a passive headset station (the Non-Control Unit or NCU).
A.R.F.F. Series Intercoms
Designed and tested to meet the specialized requirements of Aircraft Rescue Fire Fighters
The new ARVIS A.R.F.F. Series intercom system allows the operation of up to 3 two-way radios, mobile or fixed, and monitoring of additional alarm, PA, radio or other convenience audio sources such as AM/FM/CD or other product.