Type 2 PD’s that cannot operate with less than 12.95W must give indication to user when connected to Type 1 PSE, while Type 2 PD’s that can operate with less than 12.95W must be able to be powered by a Type 1 PSE [9].
Basic parameters and a brief comparison of the IEEE 802.3af and the IEEE 802.3at standards are given in Table III.