This amendment to IEEE Std 802.3-2002 as amended by IEEE Std 802.3ae-2002, IEEE Std 802.3af-2003, IEEE Std 802.3aj-2003, and IEEE Std 802.3ak-2004 combines a minimal set of extensions to the IEEE 802.3 Media Access Control (MAC) and MAC Control subl
IEEE Std 802.3af-2003 IEEE Standard for Information technology— Telecommunications and information exchange between systems— Local and metropolitan area networks— Specific requirements 添加最新的802.3at-2009
以太网供电POE(Power Over Ethernet)是一种允许在以太网线双绞线上同时传输数据和电能的技术，该技术作为IEEE标准802.3af在2003年6月得到了批准。IEEE技术使得以太网双绞线在传输数据包的同时可以向远端(100 m)的网络设备提供大约13 W的功率.这就意味着像I工，电话、无线接入点、IP，网络照相机这样的网络设备可以不再需要本地的交流电源就能获得电能而正常工作；同时使得这些设备的安装和维护比较方便和灵活；并且由于无需考虑设备的供电问题.因此有效地降低了网络基础建
[This introuduction is not part of IEEE Std 802.3af-2003, IEEE Standard for Information technology— Telecommunications and information exchange between systems—Local and metropolitan area net- works— Specific requirements CSMA/CD Access Method and Ph
802.3af-POE协议，更多资料见微信公众号：硬件工程师炼成之路EEE St 802.3af-2003
Amendment to lEEE Std 802.3-2002
including ieee Std 802. 3ae-2002
IEEE Standard for Information technology
Telecommunications and information exchange between systems
Local and metropolitan area n
