supply of network video recorder (nvr) , network video recorder (nvr) unit with accessories, suitable for three-phase memu coaches of m edha propulsion rakes, similar to hikvision model no. ds-m7508hni/gw/wi (m12) or as per medha code no. sp 675m801001, or equivalent. technical specifications: (i) 2 tb hdd with 2 gb cache memory, (ii) 32 gb sd card, (iii) 8-channel nvr with m12 connector only, along with necessary software and control equipment. the nvr sh all conform to icf specification no. icf/md/spec-269, issue status: 02, rev. 00, and shall be compatible with th e cctv system installed in memu coaches with medha propulsion. one sample shall be approved by interfacing with the existing cctv system prior to bulk supply. [ warranty period: 30 months after the date of delivery ] ]