METHOD FOR TRANSPORTING REAL-TIME LETTER WHILE THE LINE IS BUSY IN WIRELESS TELEPHONE

PURPOSE: A method for transmitting a short message in real time in the middle of telephone conversation is provided to send a short message in real time by using a DTMF(Dual Tone Multi Frequency) message used for the call processing of a mobile phone. CONSTITUTION: A key input part(11) comprises a hot key(20) to recognize the data inputted in the middle of telephone conversation as a text. A converter(30) converts the data, inputted through the key input part(11) in the middle of telephone conversation, into a DTMF message. If the data inputted through the key input part(11) is a DTMF tone, the converter(30) inserts a DTMF tone code in the DTMF message. If the inputted data is a text, the converter(30) inserts a text code in the DTMF message and then transmits the message. An interpreter(50) analyzes a DTMF message received in the middle of telephone conversation. If the received DTMF message is a DTMF tone, the interpreter(50) outputs it to a speaker(61). If the received DTMF message is text data, the interpreter(50) displays the text data through a display part(62). 본 발명은 휴대용 단말기에서 통화 중 실시간으로 문자를 전송하는 방법이, 통화 중 핫 키를 입력하는 과정과, 입력된 데이터를 문자로 인식하는 과정과, 상기 문자데이터를 DTMF(dual tone multi frequency)메시지로 전환하는 과정과, 상기 DTMF(dual tone multi frequency)메시지를 트래픽 채널을 통해 전송하는 과정으로 이루어짐을 특징으로 한다.