The location in a broadband system that serves as the root for the branching tree comprising the physical medium; the point to which all forward signals converge and the point from which all reverse signals emanate.

• 宽带系统中的一个点,用作由物理媒体组成的分支树的根,所有正向信号都在此点会聚,所有反向信号都在此点发出。