Abstract: A system for interchanging data between "agent" data processor units including processing means such as processors. Units are interconnected by an external multiwire interchange bus common to said units, with sharing the bus being orchestrated by an arbitrator. Each unit has storage means in which data is stored in an organized manner at determined addresses enabling the data to be read and/or written on demand. The whole formed by said units includes data storage means constituting a distributed interchange memory assembly common to all of the units and accessible by all of them via the interchange bus. Each unit contains a portion of the means of the assembly, constituted by an interchange memory which is accessible by the processor means of the unit, and by the processor means of another unit via the interchange bus.

Abstract: A signaling terminal system for the CCITT No. 7 common channel signaling system comprises groups of terminals and a terminal control unit for each group. Each terminal is connected by a bidirectional link to the switching network of a telecommunication exchange. Level 3 of the exchange comprises a central control unit and a main memory. The terminals and the terminal control unit are connected to level 3 of the exchange by a system bus. Within each group, each terminal is connected to the system bus by an access circuit and to the terminal control unit by an interchange circuit. Pairs of terminals may share a common access circuit and a common interchange circuit.