GB526830A - Improvements in or relating to telecommunication exchange systems - Google Patents

Abstract

526,830. Automatic exchange systems. STANDARD TELEPHONES & CABLES, Ltd., and WRIGHT, E. P. G. March 24, 1939, No. 9321. [Class 40 (iv)] In a system in which information as to partially or completely set up ' connections is recorded at a common exchange, the information is automatically routed to different recording equipments in accordance with the origin or destination of the call, in order to minimize mechanical or manual sorting of the tickets. In the case of distribution of the information in accordance with the destination of a call, the invention facilitates the handling of delayed calls by different demand operators. Specifications 484,647, 510,012 and 513,285 are referred to. Information received over incoming selectors ITS is stored in circuits SRS from which it is transferred over a discriminating circuit TC to a selected printer TM. Provision is made for 3 groups of calling or called exchanges and circuit TC operates one or both of relays A, D rm11 to identify the group and.mark it in bank of RM1 which starts to hunt. When test relay T operates, TSM hunts until an idle printer marked, in tsm2 of a group marked by rm12 in tsm1 operates P. When T operates, a circuit was closed for stepping RM2 by timed pulses, the circuit being opened by P when an idle printer is found. If there is no idle printer in the marked group, RM2 steps on to mark an overflow group of printers over rm22, P responding to an idle one as before. In both cases, H follows P and homes switch RM2. The tickets from the overflow printers are distributed manually or otherwise.