A network video recorder ( NVR ) is an internet protocol based device that sits on the network. Network Video Recorders can be managed remotely via a LAN or over the internet, giving greater flexibility to the end-user. The basic function of an NVR is the simultaneous recording and remote    access of live video streams from an IP Camera.

   NVR systems are designed to offer optimal performance for a predefined number of cameras, a    system that receives digital images / video streams over the network and records it in a digital    format.