Obviously these are for POE setups and I use them in place of a POE switch because I don't have to worry about replacing the switch and all the pain that comes with accompanied by a good nearby lightning strike will destroy things. You'll love the fact that you can easily change these things to bring the cameras back online with the help of non-web family members when you're not around to make a difference. POE injectors at a good to cheap price and excellent quality. Have been using them in my home setup since 2008.
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