TOA RS-442 intercom system accessory Switch board

The RS-442 is a switch board designed for use with the N-8400RS 4-Wire Substation Interface Unit. You can make desired switch panels to meet intended purposes by combining the RS-142 with theseparately prepared operation panel having 3 switches to be used as call buttons. Also. it can be used in connection with the RS-481 Ip Intercom Option Handset.