Time multiplex coupling arrangement for the connection of multiple buses of a time multiplex telephone exchange

Claim 1

A time multiplex coupling arrangement for the interconnection of busses transmitting multiplex signals in a telecommunication exchange installation, comprising: a number N of multiplex buses, a number N of connection buses, each individually connected to a one of said multiplex buses, first storage capacitor means terminating each said connection bus, a number S of coupling stages, where S equal the logarithm to the base 2 of N, said coupling stages being individually represented by a numeral s, in a numerical order corresponding to their respective positions in the coupling arrangement, each said coupling stage comprising a number N/2 of coupling circuits, each said coupling circuit including cross-charging circuit means for connecting signals from one connection bus to another, the arrangement of said coupling circuits being such that in a s-th coupling stage a coupling circuit will connect a connection bus having a position represented by the numeral n in a numerical order indicating the relative positions of said connection buses in the connection arrangement to a connection bus having a position relative to said n-th connection bus represented by a numeral which is the result of (N/2s +n), where n satisfies the relationship: 2rN/2s< n < OR = (2r+1)N/2s, r being a factor which is the result of 2s 1 for the s-th coupling stage, means for activating each of said coupling circuits in one of a periodically occurring series of 2S time elements, said coupling circuit connecting said nth connection bus to said (N/2s+n)-th connection bus only during the s-th and (2S-s)th time elements, in said time frame series and means for coupling multiplex signals to be switched multiplex signals from the coupling arrangement only during the 2s-th time element.