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.

 
  • 一种配线框架,在水平面上装有所有外部线路,在垂直面上装有中心局设备的端线及它们的保护装置。参阅frame(typeb)。
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