Telephone control system

Details Telephone control system Telephone control system

1975-10-14

1977-08-30

Claffy, Kathleen H.

179 71R, 179 81R, H04M 166

Patent

active

040456196

ABSTRACT:
Apparatus for controlling telephone set usage in a local telephone facility. Each potential telephone user has a card which identifies him and contains an authorization code. Prior to dialing, the user inserts the card into an accessory body which contains a reading mechanism. If the user dials an unauthorized call, the telephone set is disconnected from an outgoing telephone line. Other circuits collect and store detailed data relating to each authorized call. When the user completes a call, the data is transferred to a memory or other output device.

REFERENCES:
patent: 3555198 (1971-01-01), Stepan et al.
patent: 3573389 (1971-04-01), Greenstein et al.
patent: 3581019 (1971-05-01), Ryan
patent: 3624608 (1971-11-01), Altman
patent: 3665162 (1972-05-01), Yamamoto et al.
patent: 3801745 (1974-04-01), Zuckerman
patent: 3806652 (1974-04-01), Woolf et al.
patent: 3873781 (1975-03-01), Nissim
patent: 3931476 (1976-01-01), Matthews
patent: 3934095 (1976-01-01), Matthews et al.

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