To size a CCTV NVR, multiply each camera’s recording bitrate by the number of cameras and desired retention time, then account for resolution, frame rate, compression, audio, and continuous recording. Choose an NVR with enough hard drive capacity and expansion or RAID options to accommodate the calculated storage, while allowing additional room for system overhead and future cameras.

Yes, many CCTV NVRs include built-in Power over Ethernet (PoE) ports that connect compatible cameras and carry power and video over a single network cable. For systems without built-in PoE, connect the cameras through a PoE network switch, and check the NVR’s port count and supported camera requirements during system design.

When selecting a CCTV NVR, compare the number of built-in Power over Ethernet (PoE) ports, available Ethernet or SFP uplinks, LAN port redundancy, and supported recording bandwidth to match your camera network. For local viewing, check the number and type of display outputs, supported monitor resolutions, and whether the NVR can show separate views on multiple screens.

An NVR with ONVIF support can provide more flexibility when selecting compatible cameras, while helping integrators plan mixed-camera systems around supported streaming and control features. Compatibility with a video management platform also affects how installers handle live viewing, playback, event search, remote access, and multi-site management, so confirm that the NVR, cameras, and platform support the functions required for the project.