12v over Ethernet instead of 48v for uniview camera

[J Sigmo]

Thanks looney2ns for the article.
What I understood from it is that with passive Poe you need to know what voltage is required by the device and supply that exact voltage.
Anyway I am now using a 10m extension cable for the 12v input and will see what I will do next.
Thanks everyone for your assistance!

That sounds like the best way for you to do this, then. Since you can run a separate wire for the 12V, and you have an easy way to supply the battery-backed 12V, that seems like the safest and most effective way to accomplish what you want.