Use this post as your complete buyers guide for POE switches for any IP cameras.
What is a POE switch power over ethernet switch allows communication among the same network clients. and it has power using the same RJ45 network cable all in one.
A POE switch switch commonly has 4 ports, 8 ports, 12 ports, 16 ports, 24 and 48 ports.
Decide on how many cameras you want to connect to your POE switch then you want to make sure you have sufficient wattage for all the cameras to perform properly.