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 寬帶系統(tǒng)中的一個(gè)點(diǎn),用作由物理媒體組成的分支樹的根,所有正向信號(hào)都在此點(diǎn)會(huì)聚,所有反向信號(hào)都在此點(diǎn)發(fā)出。