本文件定义了一种光纤到户系统，该系统针对与混合光纤同轴电缆（HFC）设备的兼容性进行了优化，在家庭和前端或集线器使用相同的终端设备。RFoG系统的定义是从工厂变为被动的地方开始，从该点延伸到家庭。该接口称为光纤集线器。根据系统的需要，光学集线器的结构可能会有很多变化。RFoG系统定义为在RFoG光网络单元（R）的用户端接口处终止- 在家里。

This document defines a fiber-to-the-home system optimized for compatibility with hybrid fiber-coax (HFC) plant, using the same end equipment at both the home and at the headend or hub. The RFoG system is defined to begin where the plant becomes passive, extending from that point to the home. This interface is referred to as the Optical Hub. There are many possible variations on the structure of the optical hub, depending on the needs of the system. The RFoG system is defined to terminate at the subscriber-side interface of an RFoG Optical Network Unit (R-ONU) at the home.