Distributed status reporting system

Details Distributed status reporting system Distributed status reporting system

1979-11-23

1982-11-23

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 88, 370 90, 370 92, 34082554, H04J 302

Patent

active

043609120

ABSTRACT:
A modular bus system for reporting the status of a plurality of geographically distributed data points. The data points may be independently located or grouped with the status of each being monitored by a processor which is coupled to the data points via a bus multiplexer, a plurality of buses and a plurality of single point and multiplexed transmitters. Each bus may be coupled to a plurality of the transmitters and may be configured open or closed loop. The system operates to simultaneously interrogate each of the buses via interrogation signals, which also supply the power to the transmitters, and produces a serial response signal containing the status information of the interrogated data points.

REFERENCES:
patent: 3597549 (1971-08-01), Farmer
patent: 3883693 (1975-05-01), Moore
patent: 3889064 (1975-06-01), Fletcher
patent: 4047159 (1977-09-01), Boudry
patent: 4053714 (1977-10-01), Long
patent: 4093946 (1978-06-01), Fowler
patent: 4139737 (1979-02-01), Shimada

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