Control circuit for subscriber station in video telephone system

Details Control circuit for subscriber station in video telephone system Control circuit for subscriber station in video telephone system

1974-01-02

1976-01-20

Claffy, Kathleen H.

H04M 1106

Patent

active

039332330

ABSTRACT:
A control circuit for a subscriber station in a video telephone system includes detectors, gates, and toggles responsive to the various local and incoming supervisory signals to control operation of the local audio and video receivers and transmitters, and the ringers for selectively announcing incoming ordinary and video calls.

REFERENCES:
patent: 3612767 (1971-10-01), Anderson et al.
patent: 3649761 (1972-03-01), Bush et al.
patent: 3684833 (1972-08-01), Bush et al.
patent: 3711648 (1973-01-01), Whitney
patent: 3723654 (1973-03-01), Bunce et al.

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