Simple definition
A technology that supplies electrical equipment directly through its Ethernet cable.
Technical definition
Power over Ethernet transports data and power on the same wiring according to different IEEE standards like 802.3af, 802.3at or 802.3bt.
What is it used for ?
Power IP phones, access points Wi-Fi, cameras or network equipment without local sector sockets.
Practical example
One switch PoE can power an access point Wi-Fi installed on the ceiling via a single network cable.
Common issues
- Budget PoE of the switch exceeded
- Insufficient power for equipment
- Defective wire
Related terms
Key takeaway: This entry explains the general operation of the term. Exact settings may vary depending on software, vendors and environments.