Signal interpreting system for frequency selective multifrequenc

Details Signal interpreting system for frequency selective multifrequenc Signal interpreting system for frequency selective multifrequenc

1974-06-26

1976-06-15

Claffy, Kathleen H.

H04M 150

Patent

active

039638782

ABSTRACT:
A signal interpreting system for frequency-selective multi-frequency tone dialing includes a code tester and a code converter, and two serially connected delay means processing the output of said code tester and having an output controlling logic circuitry arranged in the output circuits of said code converter.

REFERENCES:
patent: 3128349 (1964-04-01), Boesch
patent: 3140357 (1964-07-01), Bischof
patent: 3288940 (1966-11-01), Bennett
patent: 3299216 (1967-01-01), Beyerle
patent: 3582562 (1971-06-01), Sellari
patent: 3686440 (1972-08-01), Kroeger

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