Intercom with outstanding durability. This modular system accommodates up to three radios, ten firefighters and fourteen positions, including eight intercom positions. System provides full-duplex intercom among crew members and radio push-to-talk capability from the driver, officer and pump panel positions. Sophisticated electronics ensure that only the keying operator's voice transmits over the radio. Plug and play components and the fewest components of any leading system make the System 900 easy to install, saving time and money.