supplying, configuring, installation, commissioning and maintenance of a video conferencing supplying, configuring, installation, commissioning and maintenance of a video conferencing , audio section , ceiling mount loudspeakers: supply installation testing & commissioning of 6 2-way full-range ceiling mount loud speaker with rms power: 30w, nominal impedance: 8 ohms, frequency response: 65 hz - 20 khz, nominal coverage: 110°, sensitivity: 89 db spl, max spl: continuous 104 db, peak 110db, support 70/100v transformer tapping or better , power amplifier: supply installation testing & commissioning of dual channel power amplifier with rated power: 250w @ 70v/100v, 200w @8 o & 4 o (bridged), 60 w @8 o & 4 o (stereo mode), frequency response: 20 hz - 20 khz, signal to noise: >100 db, input impedance: >10k, balanced or unbalanced or better. , ceiling tile beamforming microphone: supply installation testing & commissioning ofceiling tile beamforming microphone should be 600mm x 600mm size, should have minimum 6 beams or better, it should be possible to enable/disable any beam, mute/unmute led color indication, beamwidths of 35°, 45° and 55° with frequency invariance, beamforming range: 100 hz to 20 khz, 6g acoustic echo cancellation, noise cancellation, automatic level control, automatic gain control, support adaptive steering, support camera tracking, built-in robust power amplifier configurable as 4 x 15 watt @ 8/4 o load or 2 x 30 watt @ 4o load or better, amplifier frequency response: 20hz – 22khz, should support daisy-chain up to three ceiling tiles via cat 6 cable, normal distance support upto200 ft cable or better poe power supply kit for beamforming microphone array or better , dsp: supply installation testing & commissioning of dsp with 4 mic/line inputs and 8 mic/line outputs, built-in voip for voip conferencing, built-in usb audio, standalone and daisy-chained system, auto-discovery of devices, acoustic echo cancellation processing, echo cancellation on every mic input, noise cancellation, frequency response: 20hz – 22khz, thd + n: 0.006%, dynamic range: >105db, input impedance: 2.2k? crosstalk: < -98db, output impedance: 95o, 4 gpio port, usb, control port rs232, ethernet or better. , 4k uhd display section , 75 4k uhd display: supply installation testing & commissioning of 75 4k uhd display: with resolution: 3840 x 2160, brightness (cd/m²): 350, audio output: 10w + 10w, speaker system: 2.0 ch, features: web browser, screen share, bluetooth audio playback, usb cloning, interfaces: 3 x hdmi in, usb, audio out, external speaker out, rs-232, rj-45 or better , wall mount bracket: supply installation testing & commissioning of wall mount bracket suitable for the 75 display or better. , wireless presenter: supply installation testing & commissioning of wireless presenter with high–quality video streaming, supports full hd 1080p/60hz, up to two participant screens can be displayed simultaneously on main screen, graphic outputs: 1xhdmi, 1xmini dp, main memory: 2gb, gigabit lan or better. , switching & camera section , 4k hdr hdmi auto switcher: supply installation testing & commissioning of 2x1 4k hdr hdmi auto switcher with resolution upto 4k@60hz (4:4:4), de–embedded audio, interface: 2x hdmi in, 1x hdmi out, offering priority and last-connected switching options, should automatically switches according to the selected switching scheme based on active video signal detection or better , visual collaboration device: visual collaboration device should support to connect laptop or room pc to audio and videoperipherals with a single-cable connection, windows and ios, should work on display link driver, should supports resolution up to 2048 x 1152, supports dvi-i / hdmi / vga, with built-in usb 3.0 gigabit ethernet adapter and audio mic in and line out, should support primary / extend / mirror video modes, chipset: dl3900, vl82b2, fe 1.1s, flash: 8mb, sdram: ddr3 1gb or better, should have interface: 3.0 usb ports - 3 nos, 2.0 usb port - 4 nos, hdmi and dvi output ports or better , ptz camera: supply installation testing & commissioning of professional-grade usb ptz camera for pc-based video conferencing in full hd video quality with 1080p @30fps, 12x optical zoom for close-up views, 1/2.7 cmos sensor, 73° wide-angle, shall have built in visca port for rs232 control with external control systems, should support back light compensation, 72.5 degree to 6.9 degree - horizontal angle view, 44.8 - 3.0 degree- vertical angle view, 255 presets capability, uvc 1.0- 1=uvc1. protocol communication, uvc ptz supported, interface: 1x usb 3.0, 1x audio in or better. , camera mounting kit: supply installation testing & commissioning of camera mounting kit for the ptz camera or better. , networking section , network switch: supply installation testing & commissioning of 8-port gigabit managed switch with network ports: 8 10/100/1000mbps auto sensing gigabit ethernet, bandwidth: 16 gbps full duplex, network latency: less than 15?s, port-based qos, dhcp filtering, ieee 802.1q static vlan, igmp snooping or better , cables & connectors section , rack: supply installation testing & commissioning of 6u rack with cable manager, pdu & all accessories or better. , hdmi cable: supply installation testing & commissioning of 15m active high-speed hdmi male to male cable or better , hdmi cable: supply installation testing & commissioning of 10m active high-speed hdmi male to male cable or better. , hdmi cable: supply installation testing & commissioning of 1.8m high-speed hdmi male to male cable or better. , usb cable: supply installation testing & commissioning of 15m active usb3.0 male to male cable or better. , usb cable: supply installation testing & commissioning of 10m active usb3.0 male to male cable or better. , usb cable: supply installation testing & commissioning of 1.8m active usb3.0 male to male cable or better. , cat6 cable: supply installation testing & commissioning of shielded cat6 cable or better (in meters). , mic. cable: supply installation testing & commissioning of 2 core microphone cable or better (in meters). , speaker cable: supply installation testing & commissioning of 1.5sq.mm speaker cable or better (in meters). , assorted cables & connectors, case and capping & other accessories