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Abstract
This paper is presented in two parts. Part I introduces the two types of switching network used in electronic exchanges, namely the space division and time division and deals in detail the essential requirements and desirable characteristics of the cross-points used in the speech path of the network. After outlining the different types of cross-point used, it briefly describes the general organization of a reed cross-point, multistage linked switching network for electronic exchanges. Part II deals with the traffic aspects of such a switching network giving in detail the analytical method in evaluating the blocking probability and its application in network optimization.