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总线馈电以太网新增加的能力有传送数据,及通过现有的CAT-5以太网电缆为因特网设备供电。IEEE802.3af标准已于夏天通过并定案,此标准将对总线馈电以太网的发展和推广进行描述。虽然现在还不能证明总线馈电以太网对工业的重要性,但它最终将改变工业自动化的形式。它确实非常简单。馈电给铜线以启动远端可切换的通信链路的数据传送装置的原理同电话的馈电那样历史悠久。计算机创建用于PC外围设备的USB和FireWire输入端口时才重新发现了此技术,因此局域网这么慢才以相同技术用于以太网令人
Bus Feeding Ethernet The new added capability of transmitting data and powering Internet appliances over existing CAT-5 Ethernet cables. The IEEE 802.3af standard was adopted and finalized in the summer and will describe the development and deployment of bus-fed Ethernet. Although it is not yet possible to prove the industrial importance of bus-fed Ethernet, it will eventually change the way industrial automation is done. It is really simple. The principle of a data transfer device fed to a copper wire to initiate a far-end switchable communication link is as historic as telephony feeds. The computer rediscovered this technology when it created USB and FireWire input ports for PC peripherals so the LAN was so slow to use the same technology for Ethernet