CALL-IN MOD FOR SBA225 "The Bogen Models SBA225 and SBA325 Room Selector Panels are designed for use with Bogen Multi- Graphic« and Multicom 2000« Systems.The SBA225 is also used in BogenÆs 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. In the SBA325, the switches selectively connect up to 25 speaker-equipped locations to either a PROGRAMûA, OFF, or PROGRAMû B channel. The INTERCOM channel is selected by means of separate push on/off switches."