Recording device video network (NVR) is a software program for recording digital images on disk drive, flash drive, SD memory and other equipment for storage of information. NVR generally lacks a hardware recorder, but the software is usually on a special hardware with an operating system runs. to increase the efficiency and stability of the device from a Linux or standard Windows as the operating system of the device used. From NVR, usually in the system and communications network used.

for recording images analog camera with NVR can be of converter used. This set of video surveillance systems hybrids or HYBRID is said to be. Though image resolution and other specifications of the image of network camera to the camera image, analog pass will not be.