PoE and IP Network Cameras

One cable or none: PoE against Wi-Fi

A PoE camera takes power and video through a single Ethernet cable, which suits ceilings, soffits and long runs: the standard limit is 100 meters, or 328 feet. It needs a PoE switch, an NVR with PoE ports or an injector, and the PoE standard, 802.3af or 802.3at, should match. Wi-Fi cameras need no data cable but still need power, and their video quality depends on signal strength. Cellular models connect where there is no local network. Wired links are steadier for round-the-clock recording.

Resolution, lens and storage: matching the picture to the job

Resolution is stated in megapixels or as 1080p, 2K and 4K; 8 MP equals 4K. More pixels help you read details at a distance but use more bandwidth and storage, which H.265 compression reduces. Dome cameras suit entrances and ceilings, bullets suit walls and long views, and PTZ models pan, tilt and zoom to cover a wide yard. Night vision range is listed in feet or meters of infrared. Many models record to a microSD card, while others expect an NVR or an app.

Questions about PoE and IP Network Cameras

Do I need an NVR for an IP camera?

Not always. Many IP cameras record to a microSD card or to an app, which suits one or two cameras. An NVR makes sense for several cameras, continuous recording, larger drives and a single place to review footage.

How far can a PoE camera be from the switch?

Standard Ethernet cabling allows up to 100 meters (328 feet) between switch and camera. Beyond that you need a PoE extender or an intermediate switch, and thin or copper-clad cable can shorten the usable length.

Will any PoE camera work with any PoE switch?

Cameras following the 802.3af or 802.3at standards work with switches that supply the same or a higher standard. Some makers use passive PoE at fixed voltages, which is not compatible, so match the standard named in the listing.