DIGITAL CONFERENCE SYSTEM CENTRAL UNIT LCS-2231BS Datasheet Manual Firmware FeaturesCompact design suitable for small to medium-sized meeting areas such as town halls, local business centers or courtrooms.Full-digital circuit design ensuring stable data transmission, excellent anti-interference performance and high sound quality.Up to 60 microphone units (LCS-2231BSc/LCS-2231BSd) can be connected to a single central unit (20 units per trunk × 3 trunks).The conference system can be expanded to maximum 4 central units and up to 240 microphone units via the extension interface on each central unit.Basic configurations of the central unit can be managed locally on the equipment itself via the LCD screen and touch buttons on its front panel.All basic configurations and advanced operations of the central unit can be managed and controlled via unique conference management software.Support real-time video tracking and maximum 4 PTZ cameras connection.Conference discussions can be recorded using the built-in USB recording function or external recording equipment such as hard disk recorder (HDR).Optional 10/20/30 meters extension cables allow flexible microphone units wiring specific to local installation conditions.