ES359453A1 - Automatic telecommunication central. (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

An automatic telecommunication exchange with a switching network including first and second steps of crossbar switches through which connections between inputs to the switches of said first step and outputs of the switches of said second step can be established in the that the switches of said first step are each connected to a first coordinate multiplex of a first-pass switch and each of the second multiple of coordinates of a first-stage switch is extended to a first multiple of coordinates of one different from said second stage switches, wherein each of said second pass switches has its first multiple of coordinates connected to multiple second coordinates of said first pass switches, so that each entry to a first stage switch has access to each output of a second stage switch wherein each of said switches of first step has a plurality of first multiples of coordinates usable for overflow connections, which multiple of overflow connections can be used when a blocking situation is encountered in the interior of the network, wherein said first-pass switch has its overflow multiples directly connected to overflow multiples of a plurality of other first stage switches, and in which when a block situation is encountered the connection is first established by an overflow path by connecting the input that has to be connected to one of its switch overrun multiples by the proper operations of the crossbars, then the overflow manifold of a different first pass switch to which the first-captured overflow manifold is connected is connected by suitable operations of the crossbars to a second multiple of coordinates with access or to the desired output or group of outputs, if there is such a usable overflow path. (Machine-translation by Google Translate, not legally binding)