GB1214615A - Improvements in or relating to information-processing systems - Google Patents

Abstract

1,214,615. Data processing in telephone exchange systems. SIEMENS A.G. 29 Jan., 1968 [1 Feb., 1968], No. 4878/69. Heading H4K. A single scanning cycle controls data collection from data sources of different sorts, a group of one sort (T11 to T1m) providing data Z1 over scan leads u at the time of scanning while a group of another sort (T21 to T2n) provides a "data Z2 waiting" signal M over the scan leads at the time of scanning, the data Z2 being collected at a later time. The data sources of the first sort are exchange relay sets from which subscriber dialling data is collected. The data sources of the second sort may be keyset dialling receivers, ringing sets, impulse regenerators, or identifying devices to determine the identity of replying subscribers. As shown each scanning lead u is a four wire cable and each data source T11-T1m, T21-T2n, is selectively accessible over an address bus s to obtain the data Z2 from the sources T21 to T2n over a ten wire data bus a, and to deliver data of an unspecified character over a common bus b to stores B provided in all data sources. Each of the data sources has a corresponding storage position P11 to P1m and P21 to P2m in the scanner in which positions the data Z 1 and the signals M are buffered.