Other

Elcotel, Inc.

Charles E Murphy

Donald J Munn

Piera G Kelley

Alvaro Quiros

Eugene D Kelley

A line powered telephoe is disclosed in which the telephone is not powered from a separate external source. The improved pay telephone is powered solely by loop current available on the telephone line from the central office. A rechargeable battery is provided to store excess loop current to enable operation of the pay telephone when not off-hook to the central office. Power consumption by components of the telephone is minimized by shutting down unnecessary functions on a selective basis to ensure that sufficient excess loop current is available to recharge the battery. In addition, an improved switched-capacitor circuit is disclosed to enable storage of electricity at a voltage potential higher than the off-hook line voltage to enable firing of standard high voltage relays for coin collection and coin return.

Line powered pay telephone with power management

Voice recording apparatus includes full duplex communication between the operator`s telephone set and the PBX switching matrix, and digital signal recording circuitry, for selectably presenting the operator's actual voice or the recorded voice message to the PBX in response to operator selection.

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Sarasota, FL, United States of America

Charles E Murphy