Multiplex communications – Wide area network – Packet switching
Patent
1982-04-05
1985-01-01
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
3701101, H04Q 1104
Patent
active
044919441
ABSTRACT:
A time division exchange controlled by a plurality of control units (UC, UCP), terminal units (UT) and markers (MQ). The control units are connected to each other and to the markers by a data interchange network (RIT) of a type which provides point-to-point serial connections. The network is duplicated and operates using a semaphore procedure. Access to the network is controlled by a duplicated controller (DR). Two-way multiplex links (LX) are provided over switched paths which could be used for voice or data switching. They are also used using a semaphore procedure and serve to provide connections between the control units and the terminal units. These connections are established via the exchange switching network. The invention is applicable to telephone switching or to data switching at subscriber or trunk level.
REFERENCES:
patent: 4107480 (1978-08-01), Schlichte
patent: 4201891 (1980-05-01), Lawrence et al.
patent: 4317193 (1982-02-01), Joel
patent: 4356563 (1982-10-01), Viale
International Switching Symposium, May 11, 1979, Paris, F. Anceau et al., "Project of an Architecture for the Command of an Electronic Switching System", pp. 608-614.
GEC Journal of Science and Technology, vol. 45, No. 3, 1979, J. C. D. Nissen et al., "A Fault-Tolerant Multimicroprocessor for Telecommunications and General Applications", pp. 116-122.
International Conference on Communications, Jun. 1979, Boston, U.S.A., J. Okuda et al., "New Architecture for Public Digital Telephone Switching System", pp. 12.2.1 to 12.2.5.
Caizergues Paul
Martin Maurice
Compagnie Industrielle des Telecommunications Cit-Alcatel
Olms Douglas W.
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