Most modern IP surveillance cameras support two power standards:
1. Stabilized voltage (5 V, 12 V or 24 V DC). In this case, a power supply with the appropriate characteristics is used (Note! Often not included in the delivery!)
2. PoE technology (802.3af standard) - power and data over a twisted pair network cable. For example, a PoE injector or a network HUB with this technology can be used.
The POE injector connection diagram can be seen below in the figure.
Note! There are already a large number of varieties of POE standards, so take this into account when choosing this equipment and compare the characteristics of the POE camera and the network hub for it.
There are also HUB devices with various options for Lan ports with and without POE, usually POE ports on them are allocated accordingly.
The second connection option is the most optimal. Almost all modern cameras have this technology on board, which makes it easy and without unnecessary wires to connect the camera to the network.