Communications: electrical – Digital comparator systems
Patent
1974-12-05
1976-08-03
Yusko, Donald J.
Communications: electrical
Digital comparator systems
340310A, 340171R, H04M 1104, H04Q 1100
Patent
active
039732401
ABSTRACT:
A two-way communication system is disclosed utilizing power transmission lines as the transmission medium. The system is a multilevel repeater system in which each repeater has a unique address. The lowest level repeaters poll the terminal stations connected thereto in time multiplex. Transmission over the system is in the form of tone codes, each level preferably utilizing a different set of tones from the next higher or lower level.
REFERENCES:
patent: 3445814 (1969-05-01), Spalti
patent: 3693155 (1972-09-01), Crafton et al.
patent: 3702460 (1972-11-01), Blose
patent: 3733586 (1973-05-01), Lusk et al.
patent: 3900842 (1975-08-01), Calabro et al.
patent: 3914757 (1975-10-01), Finlay, Jr. et al.
patent: 3925763 (1975-12-01), Waohwani et al.
Cohen Joseph T.
General Electric Company
Krauss Geoffrey H.
Squillaro Jerome C.
Yusko Donald J.
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