When power over Ethernet (POE) IEEE 802.3af was ratified in 2003, its nominal power delivery at 12.95 W was more than adequate for the early adopter applications such as your standard VoIP phones, security cameras, and wireless access points (WAPs). In 2006, a group from the IEEE started a new task force to explore raising the power limits of the standard. The result was the IEEE 802.3at task force and the soon-to-be-released POE+ standard, which will enable a whole new breed of power-hungry devices from longer-range WAPs, full-featured video phones, video teleconferencing stations, and high-performance pan-tilt-zoom security cameras.
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