In 2009, the IEEE 802.3 working group released the second PoE standard, IEEE 802.3at. This added a power class that could deliver up to 25.5 W, allowing for pan and tilt cameras to use the technology.

Products that comply with IEEE 802.3at provide more than 15.4 W of power pert port, and are referred to as PoE+ devices. Advantages of PoE controllers include their power management capabilities and ...

Like other PoE products, PoE injectors comply with IEEE 802.3af, a power distribution standard from the Institute of Electrical and Electronics Engineers (IEEE). The 802.af standard specifies two ...