Network Communications Card, Class A. Mounts to the 3-CPU1 and supports Class A/B Network and Audio 3-RS485A

Network Communications Card, Class B. Mounts to the 3-CPU(1) and supports Class

Edwards

Zoned Amplifier, 20 Watt, Class A/B. 20 Watt selectable for 25 or 70 Vrms Class A/B Output. Mounts 3-ZA20A

Edwards

RS-232 Communication Card. Mounts to the 3-CPU(1)(3) and provides two separate isolated RS-232 ports. 3-RS232

Audio Source Unit with mounting Chassis, Microphone, Paging Controls and Firefighters telephone 3-ASU/FT

Edwards