Surveillance Video Recorders

Choose based on camera type: DVRs work with analog/coax cameras, NVRs work with IP cameras over Ethernet, and hybrid recorders accept both. Consider existing cameras, desired resolution, network infrastructure, and whether you need PoE (Power over Ethernet) to simplify wiring

Retention depends on camera count, resolution, frame rate, and compression; a multi-camera system recording 1080p at 15–30 FPS typically requires 1–4 TB for several days to a few weeks of footage. Look for recorders that support large HDDs, multiple drives, or external NAS for longer retention

Key features are supported resolution (1080p, 4K), H.264/H.265 compression, frame rate settings, and network bandwidth for remote viewing. Also check mobile app or web client compatibility, simultaneous remote streams, and whether the recorder supports encrypted connections and user account controls

PoE simplifies installation by supplying power and data over one cable; choose a PoE NVR when you want fewer adapters and centralized power. Match channel count to the number of cameras you plan to use plus a margin for expansion—common options are 4, 8, 16, and 32 channels

Ongoing costs mainly include electricity, occasional hard drive replacement every 3–5 years depending on workload, and cloud subscription fees if you use cloud backup or advanced analytics. Regular maintenance involves checking drive health, firmware updates, and verifying recording and network connectivity

Yes; comply with local laws about recording audio and video, avoid expecting privacy in others' private areas, and post notices where required. Secure the recorder and network with strong passwords, firmware updates, and appropriate user permissions to protect recorded data

Estimate per-camera upload by multiplying resolution, frame rate, and compression bitrate (e.g., 1080p H.264 ~1–4 Mbps). Total upload required equals sum of active streams plus overhead; cloud backup needs additional continuous upload capacity or scheduled/off-peak uploads