Tender For supply of digital public address system controller , digital class d multi channel amplifier , desktop call station , 6 watt ceiling mount speaker , 30w compact abs cabinet speaker , 6w metal grill cabinet mount speaker , end of line device for loudspeaker , 48 v dc power supply module , 24v dc power supply module , floor mounted 27u rack , 8 port non poe switch , utp cat 6 data cable , 2 core 1.5 sqmm copper power cable , 25 mm dia pvc conduit , laying of power cable , laying of cat 6 cable