Multiplex communications – Wide area network – Packet switching
Patent
1982-09-20
1985-02-12
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
370100, H04J 300
Patent
active
044995750
ABSTRACT:
A group of terminal units (GUT) for a digital exchange having distributed control residing in control means comprising microprocessor control units (UC) which are interconnected by means of the exchanges' time switching network (RXA to RXD). The control units UC are connected to each other by a duplicated point-to-point link (RIT1, RIT2) and to the switching network by a coupler (AM) which is provided with a send/receive circuit that operates using a semaphore procedure. Each of the terminal units (UT) includes a control microprocessor (mp) connected to the switching network by a send-receive circuit (ER) using a semaphore, or question and answer, procedure. The terminal units (UT) are controlled by the control units (UC) by interchanging messages using a common procedure for all the terminal units. These messages are interchanged over channels in the links that make up the switching network of the exchange.
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patent: 4107480 (1978-08-01), Schlichte
patent: 4201891 (1980-05-01), Lawrence et al.
patent: 4320501 (1982-03-01), Le Dieu et al.
International Conference on Communications, Jun. 8-12, 1980, Seattle, USA., Chea et al., Circuit Terminations etc. pp. 46.3.1 to 46.3.7.
International Switching Symposium, Oct. 25-29, 1976, Kyoto, Japan, Wurhmann Corrective Maintenance in the Integrated PCM etc., pp. 423.3.1 to 423.3.8.
Telcom Report (Siemens Revue) 1981 Special Issue "EWSD Digital Switching System", R. Borger & F. Hlawa, pp. 22-29, Peripheral Line/Trunk groups etc.
International Conference on Communications, vol. 2, Jun. 4-7, 1978, Toronto, Canada, Terry et al.-DMS-200 Traffic peripheals, pp. 32.3.1 to 32.3.6.
Behague Francois
Dupuis Bernard
Compagnie Industrielle des Telecommunications Cit-Alcatel
Olms Douglas W.
Rokoff Kenneth I.
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