- Built-in multi-channel internal communication and conference service function, the conference host can receive conference service request information sent by the conference unit; - With automatic detection function, with chairman unit, VIP unit, representative unit number detection, audio detection, key detection and list display function; - With dual hot backup function, a conference host can be set as a backup host, when the conference host abnormal backup host automatically take over; - With line power “hot plug” function, support for automatic repair and rapid positioning system failure, and does not affect the operation of other equipment; - Built-in camera tracking function, support for PELCO-D, PELCO-P, SONY, SAMSUNG, tracking host and other protocols, with adjustments, save, call presets; - With RS-232 and RS-485 two kinds of control interface and control mode, the cameras can be connected in series or parallel; - Built-in electronic voting function, with sign-in, voting, election, scoring and other data management functions; - With extended simultaneous interpretation function, can be configured 4/8/12/16/20/32/64 different languages simultaneous interpretation function; - Support extended web page control function, no need to install the program can be accessed through the browser to set and adjust the conference functions;