frame (type B)

A distributing frame carrying on one side(vertical) all outside lines and protective devices for those lines, and on the other side (horizontal) all connections of the outside lines toward the central office equipment.; 一種配線框架,在垂直面上裝有所有外部線路及這些線路的保護裝置,在水平面上裝有 外部線路指向中心局設備的連接線。參閱frame(type A)。