The difference between 802.3af vs. 802.3at (PoE vs. PoE+, respectively) is the amount of power delivered. The 802.3af PoE standard delivers 15.4 Watts to endpoint devices, while the more recent 802.3at PoE standard delivers 25.5 Watts to endpoint devices.
між 50 і 57 volts З 802.3af standard, a voltage між 44 to 57 volts може бути створений на порту. With PoE+, on the other hand, the voltage generated lies між 50 і 57 volts.
Passive PoE usually refers to any device using PoE that is not 802.3af or 802.3at. Це включає в себе пристрої, як камери і радіо антени, які йдуть на 24V PoE.