8 Channel Network Video Recorder (Nvr) With M12 4 Pole Connector To Be Supplied Along With The Storage And Necessary Software And Control As Per Icf Specification No. Icf/Md/Spec 269 Issue Status:02 Rev:00 Date 01.04.2021. Nvr Should Have Compatibility With Cctv Make Dahua Model No. Dh Ipc Hdbw3231 Fp M12 System Installed In Lhb Ac Coaches (One Sample To Be Approved By Interfacing With Existing Cctv System Before Bulk Supply)