As USEFUL AS PoE has proven to be, it has become clear that the IEEE 802.3af standard falls short when it comes to certain demanding scenarios. Power sourcing equipment (PSE) with 802.3af PoE technology can only provide a maximum of 15.4 W of power to powered devices (PD). There are many Ethernet-connected devices, such as the following, that simply need more power.
展开▼
机译：事实证明，正如USEFUL AS PoE所证明的那样，在某些苛刻的情况下，IEEE 802.3af标准显然不足。采用802.3af PoE技术的电源设备（PSE）最多只能为受电设备（PD）提供15.4 W的功率。许多以太网连接的设备（例如以下设备）仅需要更大的功率。
展开▼
