Video-telephone system initially signifies caller to called subs

Details Video-telephone system initially signifies caller to called subs Video-telephone system initially signifies caller to called subs

1975-04-25

1976-03-23

Claffy, Kathleen H.

179 55, H04M 1108

Patent

active

039461580

ABSTRACT:
Improvement to video-telephone systems allowing a called subscriber to have at his disposal on his television receiver screen, before he takes off his handset, information about the person who has initiated the call. Each subscriber station has a handset, a television camera, a television receiver and a character generator and is connected to a switching network by a telephone line, an incoming video line and an outgoing video line. Means are provided in the calling station for connecting to the outgoing video line the character generator when the calling subscriber takes down the handset and the television camera when video signals are detected on the incoming video line and in the called station for supplying with current the television receiver when ringing tone signals are detected on the telephone line.

REFERENCES:
patent: 3787626 (1974-01-01), Subieta
patent: 3816662 (1974-06-01), Shaver et al.
Review of the Electrical Communication Laboratories, Vol. 21, Nos. 9-10, pp. 582-596, Sept.-Oct. 1973.
"Video Response Equipment--Data Display with Video Telephone," T. Kamae et al.

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