Sound-activated code-controlled detection system for telephones

Details Sound-activated code-controlled detection system for telephones Sound-activated code-controlled detection system for telephones

1982-01-28

1984-03-27

Pellinen, A. D.

179 84SS, H04M 126

Patent

active

044396384

ABSTRACT:
A function generating system such as a telephone ringer, which is sound or voice-controlled in that when the signal is first applied by the caller it results in a series of digits or other sounds emitted by the receiver. The caller follows each of these sounds by either a responsive sound or silence. When the responsive sounds correspond to a programmed code, the function is activated.

REFERENCES:
patent: 4266098 (1981-05-01), Novak

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