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在英国电信事业发展过程中,先后使用过多种机架结构.早期是简单地把元器件直接装在平放的机盘上,并用螺钉把机盘固定在钢质机架中.到五十年代,发展了第一个标准实用机架—51型结构.往后由于电信设备和元器件的不断进步,相应地陆续发展了56型、62型和TEPIE型等实用结构.(一)51型和56型结构:系单面开架结构,内设多层框架,电路及元器件安装于框架搁板上,通过U型塞子连接框架和相应的机架接头.机内电缆安放于机架内两旁.设备降温依靠机架底部至顶部的自然通风对流.
In the development of the British telecommunications industry, has used a variety of rack structure.Early simply put the components directly on the flat machine tray, and screws the machine tray fixed in the steel rack to fifty In the era of development of the first standard utility rack -51-type structure.Followed by the continuous progress of telecommunications equipment and components, the correspondingly developed 56, 62 and TEPIE type and other practical structure. And 56 structure: Department of single-sided open-frame structure, equipped with multi-layer frame, the circuit and components mounted on the frame shelf, through the U-plug connection frame and the corresponding frame connector. Machine cable placed in the rack on both sides Cooling of the unit relies on natural draft convection from the bottom to the top of the rack.