Line communications system for stations in tandem - has identical modules with logic decision circuits connected with intermediate registers

摘要

The communications system for stations connected in tandem consists of a number of identical communications modules, each being connected by line and fitted with monitor circuits for the detection of line or station faults. The lines (31, 38) are connected to address identification circuits (25) and registers. The gate operates to re-route the information if it is not intended for that particular station. A decision circuit (21) decides whether data is stored in an intermediate register when the station itself is transmitting. A gate (23) controls the flow of data between the operating unit (11) and the store (22). The monitor unit (27) uses a time code to monitor the state of the line and to detect errors. It operates in conjunction with the decision circuit and initiates data shuttling when it is at the start of a transmission leg within a system section.