System and method for controlling multiplex communications betwe

Details System and method for controlling multiplex communications betwe System and method for controlling multiplex communications betwe

1991-02-05

1992-11-03

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 14, 370 858, 370 952, 371 201, 371 203, 371 204, 34082508, H04J 314

Patent

active

051611511

ABSTRACT:
A system and method for controlling multiplex communication between a master station and a plurality of slave stations, in which a predetermined signal (dummy signal) is transmitted to the plurality of slave stations via a communication circuit (serial bus) from the master station when the master station does not communicate with any one of the slave stations. The predetermined signal indicates that the master station is operating normally, and each slave station receives the predetermined signal derived from the master station via the communication circuit so that each slave station may determine that the master station and communication circuit are operating normally.

REFERENCES:
patent: 4506357 (1985-03-01), Nakayashiki et al.
patent: 4910733 (1990-03-01), Sommani et al.
US Book: Dixon R. Doll: Date1 Communication, Wiley-Interscience Publication, John Wiley & Son, New York Chapter 8 "Line Control Procedures, Network Protocols, and Control Software", 8.1 through 8.2.4.

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