本标准描述了为以太网无源光网络（EPON）设备提供服务级、多供应商互操作性所需的系统级要求。这些规范补充了现有的IEEE 802.3和IEEE 802.1标准，它们实现了物理层和数据链路层的互操作性。1本规范中具体包括-EPON系统级互操作性规范，涵盖设备功能、流量工程和服务级服务质量/服务等级（QoS/CoS）机制； -包括设备管理、服务管理和电源的管理规范 利用

This standard describes the system-level requirements needed to provide service-level, multi-vendor interoperability of Ethernet Passive Optical Network (EPON) equipment. The specifications complementthe existing IEEE 802.3 and IEEE 802.1 standards, which enable the interoperability at the Physical Layer and Data Link Layer.1 Specifically included in this specification are - EPON system-level interoperability specifications covering equipment functionality, traffic engineering, and service-level quality of service/class of service (QoS/CoS) mechanisms; - Management specifications covering equipment management, service management, and power utilization.