The early period outdoor network enclosures are made mostly by casting or angle connected through the screw and rivet, or the welded into the frame of cabinet then install the door made of a thin steel plate. This kind of outdoor power enclosure has been eliminated as it is big, bulky and shabby appearance. With the use of transistors and integrated circuits, various components become super small, the structure of cabinet develop toward the direction of miniaturization and modularization. The outdoor network enclosure has developed from the past whole panel structure into a certain size series of plug box and plug in
structure. The assembly arrangement of plug box and plug in is divided into horizontal and vertical arrangement. The materials of network cabinets commonly used thin steel plate,various shape of the steel or aluminum, and various engineering plastics etc.. The outdoor power enclosure frame network not only connected by welding and screws, but also bonding process.
