Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Testing of subscriber loop or terminal
Patent
1988-05-26
1990-05-15
Schreyer, Stafford D.
Telephonic communications
Diagnostic testing, malfunction indication, or electrical...
Testing of subscriber loop or terminal
379155, 379146, H04M 1702, H04M 124
Patent
active
049264583
ABSTRACT:
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 circuits. 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.
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Lewis Craig A.
McGarry Patrick J.
Reger Philip R.
Mars Incorporated
Schreyer Stafford D.
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