Assembly system for communications device having plug-in circuit boards connected in multiple stages

In an assembly system for an electrical device composed of plug-in circuit boards each having an edge and being provided with a plurality of plug-in connectors at such edge, the plug-in connectors presenting input and output terminals;

• a plurality of magazines each mounting a plurality of the plug-in circuit boards, the magazines each having a rear side and being disposed adjacent to one another, each plurality of plug-in circuit boards being mounted in a respective one of the magazines so that the plug-in connectors are located at the rear side;
• and rear wall circuit boards fastened to the rear sides of the magazines and including plug-in counterconnectors for mating with corresponding ones of the plug-in connectors at the edges of the plug-in circuit boards, wherein electrical connections are formed between input and output terminals of plug-in circuit boards located in adjacent magazines, the improvement wherein:
• the plug-in connectors of each said plurality of plug-in circuit boards define separate regions at the rear side of each said magazine, and at least one rear wall circuit board is fastened to two adjacent magazines and covers only two adjacent ones of said regions, one each from said two adjacent magazines;
• said plug-in counterconnectors each have a plurality of electrical contacts corresponding to said input and output terminals, respectively, of said plug-in connectors, and said rear wall circuit board includes conductor paths between selected contacts for forming the electrical connections between said input and output terminals;
• and respective ones of said input and output terminals of each said plug-in circuit board are associated with the connector of said plurality of connectors which is closest to the adjacent magazine to which the respective ones of said input and output terminals are connected.