Central station to addressed point communication system

Details Central station to addressed point communication system Central station to addressed point communication system

1974-10-02

1977-09-13

Pitts, Harold I.

Communications: electrical

Digital comparator systems

340151, 340152R, H04Q 900

Patent

active

040486206

ABSTRACT:
A communication system for the transfer of information between a central station and an addressed point has the points organized in decimal groups at different remote stations, and selects a point for communication after enabling the group thereof with a unique station address. The central station equipment produces multiple-level addressing signals in serial sequence appropriate for transmission on a pair of conductors with other signals having a different frequency characteristic. All remote stations can be coupled in common with the central station, but the many points are normally inactive with regard to communication with the central station. An addressed remote station activates a selected point therein for transferring information with the central station.

REFERENCES:
patent: 3413606 (1968-11-01), Chicanowicz
patent: 3541513 (1970-11-01), Paterson
patent: 3551885 (1970-12-01), Henzel
patent: 3593293 (1971-07-01), Rorholt
patent: 3601806 (1971-08-01), Heimbigner
patent: 3824550 (1974-07-01), Schoenwitz
patent: 3868640 (1975-02-01), Binnie
patent: 3878322 (1975-04-01), Sullivan
patent: 3921139 (1975-11-01), Hardesty

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