Clear-Com IF4W4 - Intercom Interface Unit for Encore Series4 Channel 3 or 4 Wire Camera Interface Rack Mount (1RU), provides 4 discrete Clear Com to 3 or 4 wire interface circuits Four channel interface connects Clear Com to TV cameras, two way radios, satellite links, and other communications devices through either their headset jacks or 4 wire circuits. IF4W4 has selective partyline capability. Features individual transmit, receive, and null controls, as well as transmit level indicators. Switchable mic or