Schaltungsanordnung fuer Fernsprechanlagen mit mehreren Schaltstufen

741,589. Automatic exchange systems. AUTOMATIC TELEPHONE & ELECTRIC CO., Ltd. Jan. 15, 1953 [Jan. 26, 1952], No. 13998/54. Divided out of 741,545. Drawings to Specification. Class 40 (4). The description is identical with that of Specification 741,545 but the claim is directed to a telephone system having a plurality of switching stages each consisting of primary and secondary cross-bar switches connected by link circuits, a first control circuit common to switches in the first and last of the stages and a second control circuit common to the intermediate switches, and having a plurality of registers to which the first switching stage has access and which have access to the second control circuit, in which the first control circuit is seized by a calling subscriber's line circuit to initiate the setting up of a path through the first switching stage and is released prior to the completion of that path through the stage, and in which the second control circuit is seized by a register, .only when the full complement of valid digits have been received by the register, to initiate the setting up of a path through the intermediate switches, and simultaneously to condition the first control circuit for initiating the completion of the path to the wanted subscriber's line, both control circuits being released prior to the completion of the paths through the respective stages.