Tender For providing of annual maintenance service - audio conferencing system - projector; viewsonic, globus, lg, sharp, in focus, christie, epson, sony, panasonic, benq,; neither oem nor asp,annual maintenance service - audio conferencing system - front fill speakers; ahuja, globus, sennheiser, jbl or boss, clio 124, evh and other; neither oem nor asp,annual maintenance service - audio conferencing system - projector screen; globus, somfy, ms series, sharp, hitevision, epson, rescholar and other; neither oem nor asp,annual maintenance service - audio conferencing system - dual channel power amplifier - 500 watt/channel; globus, sennheiser, jbl or boss, proton, electro voice, pa2250t; neither oem nor asp,annual maintenance service - audio conferencing system - audio mixer; lectern, oswal, ahuja, hcl, aerons, sennheiser, yamaha and other; neither oem nor asp,annual maintenance service - audio conferencing system - digital podium; other; neither oem nor asp