Stored program control type electronic exchange system

Details Stored program control type electronic exchange system Stored program control type electronic exchange system

1974-10-10

1977-02-22

Brown, Thomas W.

179 7MM, 179 18BG, H04Q 354, H04M 342

Patent

active

040093379

ABSTRACT:
A small scale electronic telephone exchange system of stored program control type having a plurality of trunks and a central computer has been disclosed. The trunks function to process the real time operation and, therefore, the central computer does not need to operate on a real time basis. The central computer always scans the condition of the trunks and the subscriber's telephone terminals and, upon detecting the change of said condition, it analyzes said change and performs the necessary process for said change. The present exchange system provides many new services but the cost of the system is reasonable.

REFERENCES:
patent: 3344235 (1967-09-01), Green et al.
patent: 3626105 (1971-12-01), DeJean et al.
patent: 3626108 (1971-12-01), Oswald et al.
patent: 3651272 (1972-03-01), Knollman
patent: 3697695 (1972-10-01), Pommerening et al.
patent: 3718907 (1973-02-01), Altenburger
patent: 3746797 (1973-07-01), Meise, Jr. et al.
patent: 3821485 (1974-06-01), Harrington et al.
patent: 3868482 (1975-02-01), Colas
patent: 3870823 (1975-03-01), Gayler et al.

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