Power over Ethernet (PoE) delivers electrical power and network data to a device over the same Ethernet cable, as defined by IEEE 802.3 standards such as 802.3af, 802.3at and 802.3bt.
Per the Ethernet Alliance, 802.3af (Type 1) provides up to 15.4 W at the switch port, 802.3at (Type 2) up to 30 W, and 802.3bt (Types 3 and 4) up to 60 W and 90 W using all four pairs. Cameras, ceiling microphones, touch panels and scheduling panels are commonly PoE-powered, so designs confirm each device's class and the switch's total PoE budget.
Where this matters: Video conferencing systems — see how AV Company New York applies this in real New York projects.
Related terms
Sources
- IEEE 802.3af-2003 — IEEE Standards Association
- IEEE 802.3bt-2018 — IEEE Standards Association
- Introducing the Ethernet Alliance Power over Ethernet Certification Program — Ethernet Alliance
Defined by Gerson Carrillo, Director of Professional Services, D.I.S.T. · Last reviewed · Editorial policy