B. IEEE 802.3at - Power over Ethernet (PoE) Plus Increasing number of powered devices required power greater than the allowable 12.95 W specified in IEEE 802.3af. These powered devices are, for example, IEEE 802.11n WiFi Access Points, pan-tilt-zoom (PTZ) security cameras, and IP Phones with advanced features such as video conferencing. These powered devices benefit from IEEE P802.3at standard.