The Bogen Model SBA225 Room Selector Panel is designed for use with Bogen Multi- Graphic and Multicom 2000 Systems.The SBA225 is also used in Bogen''s PI35A and SI35A Power Intercom systems. These panels provide call annunciation (using LEDs) and tone signal in addition to room selection. The panels use three position, four-pole lever-action switches with positive detents. In the SBA225, these switches are used to selectively connect up to 25 speaker-equipped locations to either a PROGRAM, OFF or INTERCOM channel.