Patent ID: 9065897
Filing Date: 2015-06-23
Classification: H04M

Abstract:
1. A system for blocking unauthorized outgoing calls, the system comprising: a voltage converter for converting a supply voltage from a telephone line +5 volt direct current (DC); a first circuit, disconnecting a telephone line, and wherein the first circuit is a line break control circuit; a second circuit for saving power for a pre-determined time period, and wherein the second circuit is a power saver circuit, and wherein the power saver circuit is designed for saving power for the pre-determined time period, and wherein the power saver circuit is designed to provide the saved power to rest of circuits, when the line break control circuit is active; a microcontroller comprising a list of unauthorized numbers, and wherein the list of unauthorized numbers are saved on an electrically erasable programmable read only memory (EEPROM) of the microcontroller; a tone decoder circuit for decoding a dual-tone-multi-frequency (DTMF) tones from the telephone line, and wherein the decoded DTMF tones are sent to the microcontroller; a pulse detector for detecting a dialing pulse on the telephone line, and wherein the detected dialing pulse is sent to the microcontroller; a beep generator for providing a feedback in the form of a tone for accepting a command during a programming operation; a light emitting diode (LED) controller for providing a visual indicating an ON/OFF status of the system; a reset circuit for switching the system to a default mode; and a programming interface for providing a programming and a reprogramming capability to the microcontroller.