tender for deploying the following staff for day to day maintenance in the office hours (9:00 am to 6:00 pm) monday to saturday except second saturday and gazzeted holiday as and when required. a) technician cum operator , comprehensive maintenance of telesoft make epabx/ intercom system with 80 extn. expendable up to 160 lines installed in the dda office complex mangla puri, new delhi , comprehensive maintenance of nec make 3x8 ip hybrid key telephone system for 3 p&t lines, 16 hybrid extension, installed in chief office dda office manglapuri. , comprehensive maintenance of nec make 3x8 ip hybrid key telephone system for 3 p&t lines, 16 hybrid extension, installed in se office dda office manglapuri. , comprehensive maintenance of benq make of 4000al wxga laser multimedia projector with motorized projector screen 8ft. x 6 ft. & hdmi splitter box 1x4. , comprehensive maintenance of pa/sound system with studio master make 4 channel uhf wireless microphone system with 4 microphone (02 nos. set) & 01 no. 16 channel mixing console, 01 nos.-amplifier, 04 nos. speakers etc. , supply of the push button telephone having following features including testing, commissioning etc. complete as required: (a) calller id display (b) redial (c) flash , supplying and drawing following pair 0.5 mm dia frls/hffr pvc insulated annealed copper conductor, unarmored telephone cable in the existing surface/ recessed steel/ pvc conduit as required. , supply and replacement of 180 ah lead acid battery duly charged complete with copper wires, terminals & thimbles etc suitable for 50kva/100 kva dg set complete as require at site.