- POE stands for power over ethernet
- A POE system consists of two components - a POE-PSE (Power sourcing equipment) the device which provides the power, and a POE-PD (Power delivered) equipment which receives the power over ethernet.
- PSE equipment examples - POE switches, POE injectors, POE media convertors [1]
- PD equipment examples - APs, IP cameras, other devices.
- PSE has 4 types based on PSE, PD power ratings with a 90W PSE max allowing a 71W PD draw on a port [2].
- PD ratings are only based on the power draw limit - max of 71W - class 8 PD [2]
- Power delivery limits are based on negotiations determined by the 802.3 standard. 802.3at (POE) delivers 15.4W, 802.3af (POE+) delivers 25.5W. This is the difference between POE and POE+.
labels: POE, ethernet, difference, solution, networking, IP networks, TLDR
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