Patent
1980-01-28
1981-10-20
Brown, Thomas W.
179 18ES, 179 18FG, H04Q 354
Patent
active
042962811
ABSTRACT:
A static, solid-state originating register for use with an electromechanical telephone cross-bar switching system (e.g. an NE-5* switching system by Northern Telecom) is disclosed. The static, solid-state originating register comprises a plurality of static, solid-state scan networks responsive to an equal plurality of scan points, in a one-to-one relationship, for monitoring the status of the scan points. Also included are a plurality of static, solid-state signal distributor networks for activating associated equipment in the switching system. A microprocessor is employed for controlling the operation of the scan networks and the signal distributor networks. An isolator device is used for interfacing the microprocessor with both the scan networks and the signal distributor networks.
REFERENCES:
patent: 3458662 (1969-07-01), Hayes et al.
patent: 3590165 (1971-06-01), Curtis et al.
patent: 4042784 (1977-08-01), Lupattelli et al.
"NX-IE, an Electronically Controlled Crossbar Switching System", Aro et al., IEEE Trans. on Comm. Tech., vol. COM-18 , No. 6, Dec. 1970, pp. 734-740.
"Stored-Program-Controlled Register System ANA 30 for Crossbar Exchanges", S. Ellstam et al., Ericsson Review, No. 4, 1973, pp. 131-145.
"Replacement of Rotary Registers by Processor", Widmar, Electrical Communication, vol. 49, No. 2, 1974, pp. 140-143.
Brown Thomas W.
Hogeboom Robert C.
Northern Telecom Limited
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