Coded telephone access system

Details Coded telephone access system Coded telephone access system

1984-12-04

1986-09-09

Dwyer, James L.

179 84VF, H04M 121, H04M 1102

Patent

active

046110984

ABSTRACT:
A telephone access system provides to the caller connection to an output upon receipt of a coded signal from the caller. Units are connected in sequence for receipt of each member of the coded signal. The caller has a predetermined period of time to enter the correct code or the system automatically hangs up. The system described uses TOUCH-TONE and all components are state of the art.

REFERENCES:
patent: 3984637 (1976-10-01), Caudill et al.
patent: 4383138 (1983-05-01), Castro et al.
patent: 4430728 (1984-02-01), Beitel et al.
patent: 4446334 (1984-05-01), Groff

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