KR101049110B1 - How to make a call using a mobile terminal that outputs a DTMF tone and a DTMF tone which is output through the mobile terminal - Google Patents

Abstract

According to the present invention, when one of the counterparts stored in the phone book of the mobile terminal is selected, the phone number of the selected counterpart is output as DTMF tones. It's about how to hang.

To this end, the present invention, after one of the counterpart stored in the phone book is selected, a DTMF tone generating unit for generating DTMF tones sequentially for the counterpart phone number as a key for generating DTMF tones is input, and the DTMF It provides a mobile terminal including a speaker for outputting the tone, thereby reducing the inconvenience of pressing the dial of the landline telephone while checking through the LCD the telephone number retrieved from the phone book of the mobile terminal.

DTMF tones, dial

Description

Mobile for outing Dual tone Multiple Frequency (DTMF) tone and method calling using techniques}

1 is a schematic structural diagram of a mobile terminal of the present invention

Figure 2 is an embodiment for explaining the DTMF tone output in the mobile terminal of the present invention

<Explanation of symbols for the main parts of the drawings>

10: key input unit 20: control unit

62: speaker 70: DTMF tone generator

The present invention relates to a mobile terminal for outputting DTMF (Dual Tone Multiple Frequency) tones and a method for making a call using DTMF tones output through the mobile terminal.

In particular, the present invention relates to a mobile terminal for outputting DTMF tones, when one of the counterparts stored in the phone book of the mobile terminal is selected, outputting the phone number of the selected counterpart to the DTMF tones.

Currently, calling a landline phone is cheaper than calling a mobile (communication) terminal. Therefore, even if a user is carrying a mobile terminal, there are many cases where a wired telephone is to be used when a wired telephone exists around.

Alternatively, a landline phone may be used when the battery of the mobile terminal is low.

In particular, when a user wants to make a call to the other party stored in the phone book of the mobile terminal, the other party can search for the other party's phone number in the phone book of the mobile terminal. Will be used. In this case, it is inconvenient to press the other party's telephone number on the landline telephone while checking the telephone number output on the LCD.

The present invention has been made to solve the above inconvenience, and an object of the present invention is to output a DTMF tone for a phone number of a specific counterpart in a mobile terminal.

That is, the DTMF tones output from the mobile terminal are intended to be more convenient to use a landline telephone.

According to the present invention for realizing the above object, DTMF for generating DTMF tones sequentially for the other party's telephone number as a key for generating DTMF tones is input after one of the other parties stored in the phone book is selected. It provides a mobile terminal for outputting DTMF tones, characterized in that it comprises a tone generating unit and a speaker for outputting the DTMF tones.

In addition, the present invention, when one counterpart is selected from the phone book of the mobile terminal, the DTMF tone output process for outputting the DTMF tone for the selected counterpart phone number, if the DTMF tone is input through the transmitter of the landline telephone switchboard of the landline telephone It provides a method for making a call using the DTMF tones output through the mobile terminal, characterized in that it comprises a call request process in which the call request signal is transmitted.

In addition, the present invention, when the number corresponding to the telephone number is output to the display unit of the mobile terminal, the DTMF tone to generate the DTMF tones sequentially for the telephone number through the DTMF tone generation algorithm when a key for generating the DTMF tone is input It is intended to provide a DTMF tone output method in a mobile terminal through a generation process and a DTMF tone output process of outputting the DTMF tone through a speaker.

These objects, features and advantages of the present invention will be more readily understood by reference to the accompanying drawings and the following detailed description. In describing the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the description thereof will be omitted.

1 is a schematic configuration diagram of a mobile terminal of the present invention, Figure 2 is an embodiment for explaining the DTMF tone output in the mobile terminal of the present invention.

As shown in FIG. 1, the mobile terminal according to the present invention includes a key input unit 10, which is composed of a plurality of numbers and function keys, generates key data corresponding to a key selected by a user, and transmits the generated key data to the control unit 20. And a control unit 20 for controlling overall operation of the terminal, amplifying and filtering a radio frequency signal transmitted / received through an antenna, a radio frequency transmitter / receiver 30 performing signal modulation / demodulation, and a terminal. The display unit 40 for displaying the information signal generated during the operation of the operation, and the memory unit for storing the data received through the radio frequency transmission and reception unit 30 and the key data input through the key input unit 10 ( 50) and DTMF tone generation for generating DTMF tones and voice processing unit 60 for performing modulation / demodulation of voice signals input / output to the microphone 61 and the speaker 62 according to the operation control of the control unit 20. The unit 70 is included.

Dual Tone Multiple Frequency (DTMF) is commonly used as a dial tone for electronic switchboards, and different DTMF tones are generated depending on the dial you press on a landline telephone.

For example, pressing dial 6 on a telephone would simultaneously transmit a low frequency group of 770 Hz and a high frequency group of 1477 Hz to the exchange at the same time, and the exchange would again decode it numerically and recognize it as 6.

The DTMF tone generating unit 70 generates DTMF tones for the numbers 0 to 9 and * and # according to the DTMF tone generating algorithm, and generates the same DTMF tones as the DTMF tones generated in the landline telephone. DTMF tones are output through the speaker of the terminal.

That is, when the user directly dials the telephone number with respect to the other party's telephone number, the DTMF tone for the telephone number output through the DTMF tone generating unit 70 is the same, referring to Table 1 below. The generation method will be described in detail.

1209 Hz 1336 Hz 1477 Hz 697 Hz One 2 3 770 Hz 4 5 6 852 Hz 7 8 9 941 Hz * 0 #

DTMF tone generating unit 70 generates DTMF tones for each number and *, # by mixing the low frequency group on the vertical side and the high frequency group on the horizontal side, and by using the two frequencies, the probability of error is very small. Lose.

As shown in Table 1, the number '1' is mixed with 697Hz and 1209Hz, and the number '8' is mixed with 852Hz and 1336Hz to generate DTMF tones.

The DTMF tone generating unit 70 outputs DTMF tones as a key for generating DTMF tones is input, and a process for outputting the DTMF tones will be described with reference to FIG. 2.

First, the user selects a phone book menu in the mobile terminal.

In the phone book menu, the user selects a party to call by name search, number search, or global search. In this case, the user wants to make a call using a landline telephone.

Without accessing the phone book menu, the other party's phone number may be outputted on the display unit by pressing a shortcut key. In this case, step 1) of FIG. 2 is omitted.

When the phone book search process is performed, a plurality of counterparts stored in the phone book are output as shown in 1) of FIG. 2, and one of them is selected. 1) in '4. Lee Seung-yeop ', the mobile terminal phone number, home phone number, company phone number, etc. registered in the phone book for' Lee Seung-yeop 'is output to the display unit as shown in 2).

When the telephone number for the specific counterpart is outputted on the display unit, key designation information is output to allow the user to know a key for outputting the DTMF tone, such as 'DTMF' in 2).

When a key corresponding to the key designation information is input by the user, the DTMF tone generating unit 70 generates DTMF tones for the telephone number '0195551000' outputted to 2), and the generated DTMF tones are generated through the speaker 62. Is output.

When the DTMF tones are output through the speaker 62, the user places the speaker 62 near the handset of the landline telephone. It is preferable to bring the speaker 62 of the mobile terminal into close contact with the talker so that the DTMF tone can be input well through the talker of the landline telephone.

The DTMF tones for the telephone number '0195551000', input through the handset, are the same as the DTMF tones generated when the dial of the landline telephone is pressed, so that the telephone number is transferred to the exchange (of the wired telephone) and the telephone is connected. That is, the call request signal to the telephone number is transmitted to the exchange.

In 2), when the user presses the designated key for DTMF tone output, a warning such as 'outputs DTMF tones' is allowed so that the user can move the mobile terminal closer to the landline phone before the DTMF tones are output through the speaker 62. You can also print a message.

The present invention is not limited to the above described embodiments, and various modifications and changes can be made by those skilled in the art, which are included in the spirit and scope of the present invention as defined in the appended claims.

According to the present invention, since the DTMF tones are output for the phone numbers stored in the phone book in the mobile terminal, the DTMF tones can be used to make calls to the landline telephone, thereby reducing the inconvenience of pressing a dial on the landline telephone. There is an advantage to that.

That is, the inconvenience of pressing the dial of the wired telephone is reduced while checking the telephone number retrieved from the telephone directory of the mobile terminal through the LCD.

Claims (5)

speaker; A DTMF tone generating unit generating a DTMF (Dual Tone Multiple Frequency) tone corresponding to the telephone number with respect to a telephone number for a specific counterpart; And And a controller for controlling the speaker to output the generated DTMF tone and a warning message for outputting the DTMF tone. Mobile terminal. The method of claim 1, A warning message for outputting the DTMF tone informs the start of output of the DTMF tone by the speaker. Mobile terminal. The method of claim 1, Further comprising a display unit for displaying the telephone number and the key designation information for outputting the DTMF tone for the specific counterpart, Mobile terminal. Generating a dual tone multiple frequency (DTMF) tone corresponding to the telephone number with respect to the telephone number for a specific counterpart; Outputting a warning message for outputting the DTMF tone; And Outputting the generated DTMF tones, How to make a call using DTMF tones. The method of claim 4, wherein Receiving, by a landline telephone, the DTMF tones through a telephone receiver of the wireline telephone; And Transmitting, by the wire telephone, a call request signal to the telephone number corresponding to the DTMF tone; How to make a call using DTMF tones.

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