LOW POWER CONTROL APPARATUS FOR A COIN OPERATED TELEPHONE

摘要

A low power control apparatus for a coin operated telephone controls a full range of phone functions as well as an electronic coin acceptor. The control utilizes phone line power. Power for all the normal operations of the coin operated telephone and its coin acceptor is also supplied from the phone line. The control is preferably microcontroller based and designed utilizing low power components. In the control. an interface circuit serves to connect the phone tip and ring lines to either a power supply circuit or to a totalizer and escrow control circuit. The power supply also provides power to an audio network including a variety of fraud prevention circuits, a modem, and several time generator circus. A monitor system monitors the status of several security switches to monitor the phone's condition. Hardware and software design features control the application of power to circuits only when needed.