Communication system to monitor individual subscribers

Details Communication system to monitor individual subscribers Communication system to monitor individual subscribers

1976-04-02

1977-03-08

Stella, George G.

H04M 1100

Patent

active

040114090

ABSTRACT:
Individual subscribers belonging to a class including superannuated, disabled, sick and medically unstable are monitored in a communication system by establishing time-based periods for telephone link responses between each subscriber and a monitor station where separate electrical signals are produced corresponding to the telephone link responses. The electrical signals are used to energize indicator means including lights used to detect a failure of a subscriber to respond according to the established time-based period for a telephone link response. An alert is provided on behalf of a subscriber based on the detected failure of a subscriber to respond. The indicator means is reset at preselected intervals of time corresponding to the time-based periods for telephone link responses.

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