With the 802.3bt standard, IEEE has standardized a PoE process, Power over Ethernet (PoE), which in terms of power is far above the classic processes according to IEEE 802.3af and 802.3at
and supports supply powers of up to 90 W. This is also referred to as PoE++. It is therefore also referred to as PoE++. In contrast to the other two methods mentioned, IEEE 802.3bt works with four pairs of a LAN cable: 4 Pair Power over Ethernet (4PPoE). In the classification of power levels, these are power classes 5, 6, 7 and 8, whereas 802.3at supports power classes 3 and 4 and 802.3af supports power classes 0, 1 and 2. The power sourcing equipment (PSE) supply powers are 45 W, 60 W, 75 W and 90 W depending on the power class, while the power at the powered devices
(PD) range from 40 W to 72 W. The power difference between the power sourcing equipment and the powered equipment corresponds to the power loss in the mains wiring. Thesupply voltages are 50 V and 52 V.
The power supplied by 802.3bt can be used to power wireless access points (WAP), surveillance cameras, IP cameras, displays, and other components.