TELEPHONE KEYPAD

摘要

The method generates sound signal corresponding to a key pressed so that the key pressed is discriminated by the sound. The method comprises the steps of; (A) setting registration mode when a registration key is pressed during idle mode; (B) storing condensed phone number on a dial buffer; (C) synthesizing sound according to the condensed phone number and transmitting the sound signal to a speaker; (D) storing a dial key on a dial buffer and synthesizing sound according to the dial key when a dial key is input during a busy mode; and (E) transmitting the sound signal to a speaker.