A distributing frame carrying on one side (horizontal) all outside lines, and on the other side (vertical) the terminations of the central office equipment and protective devices for them.; 一種配線框架,在水平面上裝有所有外部線路,在垂直面上裝有中心局設(shè)備的端線及它們 的保護(hù)裝置。參閱frame(type B)。