Telecommunications and exchange between information technology systems — Requirements for local and metropolitan area networks — Part 3: Standard for Ethernet — Amendment 6: Maintenance #13: Power over ethernet over 2 pairs
信息技术系统之间的电信和交换.局域网和城域网的要求.第3部分:以太网标准.修改件6:维护#13:2对以上以太网供电