What is PoE power?

What are the advantages of PoE power supply?

• Because PoE power allows you to use a single cable for both power and data transmission, PoE power saves you money on cable purchases and operation.
• PoE power makes it easier to install and expand your network and cheaper in buildings where installing new power cables is too expensive or impractical.
• Using PoE technology, you can mount devices in places where installing power might be impractical, such as in false ceilings.
• Using PoE technology, you can reduce the amount of cords and outlets in a crowded room or cable closet.

Used POE standard IEEE 802.3af

PoE IEEE 802.3af defines active PoE, which includes power negotiation. It provides up to 15.4 W (minimum 44V DC and 350 mA) on each port. 12.95 W is guaranteed to power the device itself, as the difference is calculated for line losses.</p

For more general information on POE, see, for example, Wikipedia