bids are invited for av conference system1 digital conference control unit , digital chairperson discussion unit with removable microphone , digital chairperson discussion unit with removable microphone capability , gsm immune gooseneck microphone , interconnection cable shielded type 3m , interconnection cable shielded type 20m , professional ptz camera , digital signal processor , control system , 8 port network switch , speakers , 2 ch class d amplifier , video conferencing system , 55 inch professional display , 98 inch interactive display , hdmi extender , hdmi distribution amplifier , hdmi cables 1.5 mtrs , raceway and casing , hdmi cables signal cables usb a-b cables and connectors , installation programming sl no 1 digital central conference controller with recording & web server,conference controller with built-in digital signal processing controller unit with 4 bus connections (4 branches or 2 closed loops) for redundancy mechanism. the controller should support total cable length of a branch loop are upto 400m or more . the maximam cable length between units or between units and central unit is 80m or more . control & configure the controller via the integrated web server. 2 x usb connections to connect usb storage device for direct recording of the meeting. recording in mp3 or wav format, seamless takeover of recording between 2 usb devices, playback through units loudspeakers. maximun number of open microphones at a time- upto 8 camera control (look at me) integration capability. controller with lcd display to implement several conference mode: direct access, request, push to talk, fifo, vox control selectable voice activation. volume 1 26control 0 db to -46 db + off digital acoustic , feedback , speakerphone total quantity : 74