http://www.pvoutput.org/list.jsp?id=46229&sid=42168
https://www.inscapedata.com/pdf/IEEE802.3at_Standard.pdf
De standaard dwingt backwards compatibility af. Dus als de adapter aan de standaard voldoet dan gaat het werken.Assured compatibility
The IEEE standards group has defined precise limitations. PoE+ extends the previous 802.3af
standard, and it will operate within this defined framework.
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