POE 12v or 48v?

[tacman7 0]

Thinking about a little 4 port POE switch. They come without power so you add the adapter you need.

 

Are these an actual network switch?

 

One seller said to use 48v for 12v camera:

 

If your camera is with word “12V/PoE” as this picture shows, then please select 48V Power Adapter, do not select 12V Power Adapter.

Because "12V/PoE" means it can offer power supply to camera via 12V DC port or 48V PoE Ethernet port:

 

If it's just for camera it could be 12v right?

 

Thanks

[tacman7 0]

ok, so if a camera is 12v and it supports POE then it can use the standard 48v that networks usually have right?

[Securame 0]

Real POE is 48V.

[BriceHughes 0]

The POE standard is 48 volts DC, but unfortunately some manufacturers make proprietary equipment that sends 12 or even 5 volts DC over ethernet, and they sometimes label those products POE as well. You'll also see passive adapters you can plug any arbitrary power supply into sometimes labeled as "POE injectors" when they're nothing of the sort.

 

Any major brand-name manufacturer should be correctly labeling their products, but if you're buying generic, imported, or unbranded products, you'd better read the specs to make sure it will work with standard POE equipment.