Four IFB is a four position analog telephone line interface. This road tough product is designed to provide flexible listen-only IFB for television field production use. Each IFB output, and the monitor input/ output jacks, may be separately connected to one of the four analog phone lines. A telephone handset may also be connected for communication with the Monitor phone line.
Four IFB is designed for use in real world environments and weather conditions. All controls and components are dust and moisture resistant. The hinged cover protects the unit's selector switches, add/drop buttons, and keypad.