KR20080100656A

KR20080100656A - Apparatus and method for automatic call routing between portable terminal and wireless headset

Info

Publication number: KR20080100656A
Application number: KR1020070046627A
Authority: KR
Inventors: 이의복
Original assignee: 이의복
Priority date: 2007-05-14
Filing date: 2007-05-14
Publication date: 2008-11-19

Abstract

An apparatus for automatically selecting a call route and a method thereof are provided to enable a user to perform telephone conversation with the other party through a specific provider network which provides a fee discount service by integrating an automatic line selection function with a wireless headset. A mobile communication terminal(10) comprises the followings: a Bluetooth module(14) performing short-distance communication with a wireless headset; a key input unit(16) consisting of function keys and numeric keys; a memory unit(20) where the ID of the wireless headset is stored; a wireless processing unit(24) which performs communication with the mobile communication terminal, and includes an RF transmitter for up-converting/amplifying the frequency of a transmitted signal and an RF receiver for down-converting/low-noise amplifying a received signal; a data processing unit(22) which comprises a transmitter for coding/modulating a transmitted signal and a receiver for decoding/demodulating a received signal; and a DTMF generator(28) converting the telephone number and identification value into the DTMF signal under predetermined control.

Description

Apparatus and method for automatic line selection between mobile terminal and wireless headset {APPARATUS AND METHOD FOR AUTOMATIC CALL ROUTING BETWEEN PORTABLE TERMINAL AND WIRELESS HEADSET}

1 is a block diagram of a portable terminal and a wireless headset to which the present invention is applied.

2 is a flowchart illustrating automatic line selection between a mobile terminal and a wireless headset according to an exemplary embodiment of the present invention.

The present invention relates to a circuit automatic selection apparatus and method using near field communication between a mobile terminal and a wireless headset.

As the spread of portable terminals increases, the proportion of the telephone bills of the portable terminals is gradually increasing, and as a way to reduce the telephone bills, a call is made through a specific operator network that provides a rate discount service such as an Internet phone operator. Although a lot of methods are used, in this case, it is inconvenient to dial a specific provider network access number that provides a discount service every time a call is made, connect a call, and then enter a counterpart's phone number.

On the other hand, the recent mobile communication terminal is configured so that the user can use the wireless headset, users can have the convenience of the call by using the wireless headset. Such a wireless headset typically allows a user to make a phone call in a hands-free state through a mobile communication terminal and a short distance (for example, 10m) wireless communication such as Bluetooth. Bluetooth is a short-range wireless communication concept that replaces wired or infrared communication in the near field, and the Bluetooth protocol has been proposed by ericsson. The Bluetooth standard is a method of communicating with other Bluetooth devices (eg, wireless headsets) using a master of communication (eg, a mobile communication terminal) as a master at a short range.

Accordingly, an object of the present invention is that even if a user makes a phone call using only the other party's phone number according to the conventional method while the user uses the wireless headset connected to the mobile terminal and the short range wireless communication, the portable terminal and the wireless headset connected to the short range wireless communication The present invention provides a circuit automatic selection apparatus and method between a mobile terminal and a wireless headset that can communicate with a counterpart through a specific provider network that provides a rate discount service by a circuit automatic selection method.

In accordance with the above object, the present invention provides a line automatic selection device between a mobile terminal and a wireless headset using short-range wireless communication, and detects that the other party's telephone number is dialed by the user and transmits a dial start notification signal to the wireless headset. Confirm and transmit the requested counterpart phone number corresponding to the dial start notification signal; and, when receiving a signal to stop the dialing operation from a wireless headset, terminate the dialing operation; Returning a signal indicating that the call is terminated, receiving a request from the wireless headset to dial a connection number for automatic line selection, dialing the received access number to connect a call, and transmitting the access number dial start notification signal, Then, the call is connected by converting the other party's phone number to DTMF. When requested to transmit to the network, to convert the received other party a telephone number to DTMF and the mobile terminal transmitting to the network the call is connected,

When the other party's telephone number dial start notification signal is received from the mobile terminal, the other party's telephone number information is requested, and it is determined whether or not the other party's telephone number corresponding to the request matches a pre-stored list of telephone rate reduction target telephone numbers. If there is a matching number, the mobile terminal transmits a signal requesting to terminate the dial operation, and temporarily stores an identification value for identifying the last digit of the received counterpart phone number after the counterpart phone number. And when the mobile terminal receives a signal indicating that the dial is terminated, requesting the mobile terminal to dial a previously stored line automatic selection access number, and in response to the request, provide the access number dial start notification signal. When receiving, the mobile terminal After waiting for a predetermined time as long as the dialed access number and the call can be connected, the other party's phone number which was temporarily stored by adding the identification value is converted to DTMF (Dual Tone Multi Frequency) signal to the mobile terminal. The call consists of a radio headset requesting transmission to the connected network.

In another aspect, the present invention provides a method for transmitting a dial start notification signal to the wireless headset when the portable terminal detects that the user starts dialing the other party's phone number in a standby mode connected to the wireless terminal between the mobile terminal and the wireless headset. Requesting the other party's telephone number information being dialed from the wireless headset when the dial start notification signal is received by the wireless headset; checking the other party's telephone number being dialed according to the telephone number information request at the mobile terminal; Transmitting a signal to the wireless headset, checking whether the received telephone number matches the previously stored list of phone number to be saved, and if there is a matching number, requesting to terminate the dialing operation by the mobile terminal. Sending And temporarily storing an identification value for identifying the last digit of a telephone number after the counterpart telephone number in the received counterpart telephone number, and temporarily receiving the dialing end request signal from the mobile terminal. Transmitting a signal indicating that the dialing is terminated and ending dialing to the wireless headset, and requesting the portable terminal to dial a pre-stored access number for automatic line selection when the dialing end signal is received by the wireless headset; And transmitting the dial start notification signal to the wireless headset while dialing the requested access number in the mobile terminal, and receiving the access number dial start notification signal from the wireless headset. Image on the mobile terminal After waiting for a predetermined time as long as the access number and the call can be connected, requesting the mobile terminal to convert the temporarily stored counterpart phone number to DTMF (Dual Tone Multi Frequency) signal and transmit the call to the connected network. And converting the requested counterpart phone number into a DTMF signal and transmitting the call to the network to which the call is connected.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, specific details such as specific components are shown, which are provided to help the overall understanding of the present invention, and it is understood that certain specific changes or modifications may be made within the scope of the present invention. It will be obvious to those with ordinary knowledge.

1 is a block diagram of a mobile communication terminal and a Bluetooth headset according to the present invention. In FIG. 1, reference numeral 10 is a block diagram of a mobile communication terminal, and reference numeral 50 is a block diagram of a wireless headset. In the embodiment of the present invention, the wireless headset 50 and the mobile terminal 10 will be described by way of example as being connected via Bluetooth communication. Referring to FIG. 1, the mobile communication terminal 10 includes a terminal controller 12, a Bluetooth module 14, a key input unit 16, a memory unit 20, a data processing unit 22, and a wireless processing unit ( 24), an audio processing section 26, a DTMF generating section, a display section 30, a reception level measuring section 32, a microphone, and a speaker.

The portable terminal controller 12 controls the overall operation of the portable terminal 10. The control unit 12 according to an embodiment of the present invention stores and registers the ID of the wireless headset 50 in the memory 20 so that the wireless headset 50 can be connected to the wireless headset 50 through Bluetooth communication. In addition, when it is recognized that the wireless headset 50 is within a communication range, it is determined whether the wireless headset 10 is duly registered by comparing the ID of the wireless headset 10. If connected by Bluetooth communication, the wireless headset can be used to control.

When the controller 12 of the portable terminal detects that the user starts to dial the phone number to make a phone call, the Bluetooth module unit 14 sends a signal indicating that the dial is started to the wireless headset 50 through Bluetooth communication. Send via In addition, when receiving a signal for requesting the other party's telephone number information of the dialing from the wireless headset 50, the other party's telephone number is checked and transmitted to the wireless headset 50 through the Bluetooth module unit 14. do. In addition, when a signal for stopping the dialing operation is received from the wireless headset 50, the dialing operation is terminated, and a signal indicating that the dialing operation is terminated is returned through the Bluetooth module unit 14. In addition, when receiving a signal for requesting to dial a connection number for automatic line selection from the wireless headset 50, the call is dialed to receive the connection number. In addition, the dial start notification signal is transmitted to the wireless headset 50 through the Bluetooth module 14 while starting the access number dial. In addition, when receiving the signal to convert the other party's telephone number to DTMF from the wireless headset 50 to transmit the call to the network connected to the call, the other party's telephone number is converted into a DTMF signal by the DTMF generator 28 The processor 24 controls the call to be transmitted to the connected network.

The Bluetooth module 14 includes an RF transmitter, an RF receiver, and a baseband processor, and the RF transmitter modulates and amplifies a radio transmission data packet generated by the baseband processor to a predetermined frequency band for transmission. do. The RF receiver suppresses amplification of noise of the received frequency signal as much as possible, amplifies a signal of a set frequency band, lowers the signal to a low frequency band, and applies the signal to the baseband processor. The baseband processor changes the packet format to which an access code and a header are added to various Host Controller Interface (HCI) data packets applied from the terminal controller 12. Then, it is converted into a predetermined data packet for wireless transmission and wirelessly transmitted in the frequency band set through the RF transmitter. In addition, the baseband processor converts the data packet received through the RF receiver into the HCI packet and applies it to the portable terminal controller 12 as a host. Meanwhile, the Bluetooth module 14 includes a link controller therein to control the Bluetooth module 14 based on a command of a COMMAND packet applied from the portable terminal controller 12. Also, the Bluetooth headset 50 information received from the baseband processor is transmitted to the mobile terminal controller 12 as an HCI packet.

The key input unit 16 includes a plurality of numeric keys and function keys for performing various functions. The key input unit 16 outputs an electrical signal of key data to the controller 12 by a user's key input. The key input unit 16 according to an embodiment of the present invention is used as a numeric key for inputting a counterpart phone number and a function key for instructing to dial the input telephone number.

The memory unit 20 may be composed of a program memory and a data memory. The program memory stores a program for controlling a general operation of the mobile communication terminal. The memory 20 is composed of a ROM (Read Only Memory) and a RAM (RAM) for storing a plurality of program data, and a random access memory (RAM) and the like, and various phone books and messages that can be output from the mobile communication terminal. Data is stored. The memory unit 20 according to an embodiment of the present invention stores the ID of the wireless headset 50 connected to the mobile terminal 10.

The data processor (MODEM) 22 includes a transmitter for encoding and modulating the transmitted signal, a receiver for demodulating and decoding the received signal, and the like.

The wireless processing unit 24 performs communication of the portable terminal. The radio processor 24 includes an RF transmitter for upconverting and amplifying a frequency of a transmitted signal, and an RF receiver for low noise amplifying and downconverting a received signal.

The audio processor 26 generally consists of a VOCODER and is driven under the control of the controller 12. The audio processor 26 decodes the coded voice data received from the wireless processor 24, converts the coded voice data into an electric voice signal, and outputs the converted voice signal. The speaker converts the received electric voice signal into an audible sound and outputs the audible sound. do. In addition, the audio processor 26 encodes an electric voice signal received from the microphone and outputs the electrical voice signal to the wireless processor 24.

The display unit 30 displays the current state, each processing and operation state in accordance with the key input from the key input unit 16.

The reception level measuring unit 32 measures the power level of the wireless headset 50 signal received by the RF receiving unit of the Bluetooth module unit 14 under the control of the terminal control unit 12.

Meanwhile, referring back to FIG. 1, the wireless headset 50 according to the present invention includes a headset controller 52, a key input unit 54, an audio processing unit 56, a memory unit 58, a Bluetooth module unit 60, Includes speakers and microphones. The headset controller 52 controls the voice call operation of the Bluetooth headset using Bluetooth wireless communication. According to an embodiment of the present invention, the headset controller 12 is a portable terminal 10 in a wireless communication standby mode with the portable terminal 10. When receiving the dial start notification signal of the other party's telephone number from 10), the mobile terminal 10 controls to request the other party's telephone number information being dialed. Further, the other party's telephone number requested by the mobile terminal 10 is received. If it is determined that it matches with the list of telephone number reduction target phone numbers previously stored in the memory unit 58, if there is a matching number, the mobile terminal 10 transmits a signal requesting to terminate the dial operation, and the reception is performed. An identification value for identifying the last digit of a counterpart phone number is added to the memory unit 58 after the counterpart phone number. To save the time. For example, when the counterpart phone number is "0012345678" and the identification value is "#", the counterpart phone number stored in the memory 58 is "0012345678 #". If there is no matching number as a result of the determination, the mobile terminal 10 is switched to the wireless communication standby mode.

In addition, the headset controller 52 requests the portable terminal 10 to dial a line automatic selection access number stored in advance in the memory unit 58 when the portable terminal 10 receives a signal indicating that the dial is terminated. To control. In addition, when receiving the access number dial start notification signal from the mobile terminal 10, the mobile terminal 10 waits for a predetermined time for a predetermined time to be connected to the dialed access number, the identification value Add to control the phone number that was temporarily stored to the mobile terminal 10 to switch to DTMF (Dual Tone Multi Frequency) signal to control the call to transmit to the connected network. In addition, when the mobile terminal 10 receives the input of a key for connecting a voice call with the mobile terminal 10 from the key input unit 54 after the line automatic selection access numbering call is connected, the mobile terminal 10 Control to set the voice call mode.

The key input unit 54 is used to receive an input of a key for connecting the call when a signal indicating that the call is received is received from the mobile terminal 10. In addition, according to an embodiment of the present invention, the mobile terminal 10 is used to receive a signal of a key requesting to connect a voice call with the mobile terminal 10 after the line automatic selection access number and the call are connected.

The audio processor 56 demodulates the voice signal received from the Bluetooth module 60 and outputs it to the speaker. Further, the mobile terminal 10 converts the signal converted into an electrical voice signal by the microphone through the Bluetooth module 60. To send).

The Bluetooth module unit 60 is composed of an RF transmitter, an RF receiver, and a baseband processor. The Bluetooth module 60 is connected to the headset controller 52 by the baseband processor of the Bluetooth module 60 and is connected to the mobile terminal 10. Control commands and voice data are transmitted and received using the HCI packet. The RF receiver suppresses amplification of noise of the received frequency signal as much as possible, amplifies a signal of a set frequency band, lowers the signal to a low frequency band, and applies the signal to the baseband processor. The baseband processor changes the packet format to add an access code and a header to various HCI packets applied from the headset controller 52, and then converts the packet into a predetermined data packet for wireless transmission to the frequency band set through the RF transmitter. Wireless transmission is applied to the headset controller 52 by changing the data packet received through the RF receiver into the HCI packet.

The memory unit 58 may be composed of a program memory and a data memory. The program memory stores a program for controlling a general operation of a wireless headset and a program for controlling a circuit automatic selection function according to an embodiment of the present invention. The memory 58 is composed of a ROM (Read Only Memory) and a RAM (RAM) for storing a plurality of program data. In the memory unit 58 according to an exemplary embodiment of the present invention, a connection number for automatic line selection of a specific provider network that provides a telephone rate reduction service is stored. In addition, the mobile phone identification number, the long distance telephone identification number, the international telephone identification number which is a list of the phone number to be reduced to the phone number is stored. In addition, the other party's telephone number received from the mobile terminal 10 is stored by adding a telephone number end identification value, for example, "#".

2 is a flowchart illustrating an automatic line selection operation procedure between the mobile terminal 10 and the wireless headset 50 according to an exemplary embodiment of the present invention. In the embodiment of the present invention of FIG. 2, the mobile terminal 10 and the wireless headset 50 have Bluetooth modules 14 and 60, respectively, and perform Bluetooth communication through the modules 14 and 60. . Referring to FIG. 2, when it is recognized that the wireless headset 50 is within a communicable range, the portable terminal 10 compares the IDs of the wireless headset 10 and determines whether the wireless headset 10 is duly registered. If it is determined that the wireless headset is duly registered as a result of the determination, step 200 is performed to execute a standby mode capable of Bluetooth communication. Thereafter, when the mobile terminal controller 10 detects that the other party's telephone number is dialed by the user (step 205), the mobile terminal controller 10 executes step 210 of transmitting the dial start notification signal to the wireless headset 50.

When the wireless headset controller 52 receives the dial start notification signal from the mobile terminal 10, the wireless headset controller 52 requests step 215 of requesting the other party's telephone number being dialed from the mobile terminal 10. Thereafter, the mobile terminal controller 12 checks the counterpart's telephone number being dialed according to the telephone number information request (step 220), and then executes step 225 of transmitting the counterpart's telephone number to the wireless headset 50.

The wireless headset controller 52 executes step 230 of determining whether the received counterpart phone number matches the list of charge reduction target phone numbers previously stored in the memory 58. In addition, if it is determined that the list matches the telephone number, the mobile terminal 10 transmits a signal for requesting to terminate the current dialing operation in step 235 and an identification value for identifying the last digit of the received counterpart telephone number. For example, step 240 is performed in which "#" is added after the counterpart phone number and stored in the memory 58. The portable terminal controller 12 terminates the dialing operation according to the dial operation end request requested in step 235 (step 245), and executes step 250 of transmitting the dial operation end signal to the wireless headset 50. In step 255, the wireless headset controller 52 outputs a line automatic selection access number of a company that provides a telephone rate reduction service stored in the memory 58 when the dial operation end signal of step 250 is received, and the portable terminal. In step 260, the mobile terminal controller 12 receives the access number dial request signal, and the mobile terminal controller 12 receives the access number dial request signal. Step 270 of transmitting a signal to the wireless headset 10 and step 275 of connecting a call to the access number are performed.

When the wireless headset controller 52 receives the dial start notification signal of step 270, the portable terminal 10 waits for a predetermined time for a predetermined time for which a call can be connected to the dialed access number, and then the identification value is set. Step 280 to output the other party's phone number that was added and temporarily stored in the memory 58, and to convert the other party's phone number to a DTMF (Dual Tone Multi Frequency) signal to the mobile terminal 10 to transmit to the network to which the call is connected. Perform step 285, requesting. The mobile terminal control unit 12 receiving the request of step 285 executes step 290 of converting the received counterpart phone number into a DTMF signal and transmitting it to the network to which the call is connected. Then, the key input unit 54 performs the mobile terminal. The wireless headset controller 52 which has received a key input requesting to connect the voice call with the 10 executes step 300 of setting a voice call mode with the portable terminal 10.

As described above, the configuration and operation according to the embodiment of the present invention can be made. Meanwhile, in the above description of the present invention, specific embodiments have been described, but various modifications can be made without departing from the scope of the present invention. Therefore, the scope of the present invention should not be defined by the described embodiments, but should be defined by the claims and their equivalents.

As described above, the apparatus and method for automatically selecting a line for reducing the call charge between the mobile terminal and the wireless headset according to the present invention may be applied to a connection number of a predetermined rate reduction service provider even if the user dials only the other party's phone number as before. First, the call is automatically connected to the other party so that the user can conveniently receive the call service at a low rate.

In addition, by incorporating the automatic circuit selection function in the wireless headset, there is an effect of reducing the cost of purchasing a separate automatic circuit selection device.

Claims

In the line automatic selection device between a mobile terminal and a wireless headset using short-range wireless communication,

Detects that the other party's telephone number is dialed by the user and transmits a dial start notification signal to the wireless headset, and checks and transmits the requested counterpart telephone number corresponding to the dial start notification signal, and then transmits to the wireless headset. When receiving a signal to stop the dialing operation from the end of the dialing operation, and returns a signal that the dialing operation is terminated, receiving a request from the wireless headset to dial the access number for automatic line selection from the wireless headset, Dials the access number, transmits the access number dial start notification signal, and then converts the other party's phone number to DTMF to transmit the call to the network to which the call is connected. Converted to DTMF and transmitted to the network connected to the call With a mobile terminal,

When the other party's telephone number dial start notification signal is received from the mobile terminal, the other party's telephone number information is requested, and it is determined whether the other party's telephone number corresponding to the request matches a pre-stored list of telephone rate reduction target telephone numbers. If there is a matching number, the mobile terminal transmits a signal requesting to terminate the dial operation, and temporarily stores an identification value for identifying the last digit of the received counterpart phone number after the counterpart phone number. When the mobile terminal receives a signal indicating that the dial has been terminated, the mobile terminal requests the mobile terminal to dial a pre-stored access number for automatic line selection, and in response to the request, the access number dial start notification signal. When receiving the from the mobile terminal After waiting for a predetermined time for a predetermined time as long as a connection time can be connected to the previously dialed access number, the phone number which was temporarily stored by adding the identification value is converted to DTMF (Dual Tone Multi Frequency) signal to the mobile terminal. Automatic circuit selection device between the mobile terminal and the wireless headset, characterized in that consisting of a wireless headset for requesting to transmit the call to the connected network

The method of claim 1, wherein the mobile communication terminal,

A Bluetooth module for performing near field communication with a wireless headset,

A key input unit consisting of numeric keys and function keys,

A memory unit for storing the ID of the wireless headset;

A wireless processor for performing communication of the mobile communication terminal, the RF transmitter for up-converting and amplifying a frequency of a transmitted signal, and an RF receiver for low noise amplifying and down-converting a received signal;

A data processing unit including a transmitter for encoding and modulating the transmitted signal and a receiver for demodulating and decoding the received signal;

A DTMF generating unit for converting telephone numbers and identification values into DTMF signals under predetermined control;

It controls the overall operation of the mobile communication terminal, detects that the other party's phone number is dialed by the user, and transmits a dial start notification signal to the wireless headset, and sends the requested counterpart phone number corresponding to the dial start notification signal. Confirm and transmit, and when receiving a signal to stop the dialing operation from the wireless headset, terminates the dialing operation, returns a signal indicating that the dialing operation is terminated, and connects the line automatic selection from the wireless headset. Receiving a request to dial a number, dialing the received access number to connect a call, and returning the access number dial start notification signal, and then converting the other party's telephone number to DTMF to the network to which the call is connected. When requested to send, the called party number And a terminal control unit for converting to DTMF and transmitting the call to a connected network.

The method of claim 1, wherein the wireless headset,

A Bluetooth module for performing near field communication with a mobile communication terminal;

A line number for automatic line selection and a list of phone number to be reduced, and a memory unit for temporarily storing the other party's telephone number received from the mobile communication terminal;

Upon receiving the other party's telephone number dial start notification signal from the mobile communication terminal, requesting the other party's telephone number information being dialed, and determining whether the other party's telephone number received by the request matches a list of pre-stored telephone rate reduction target telephone numbers. If there is a matching number, the mobile communication terminal transmits a signal requesting to terminate the dial operation, and temporarily stores an identification value for identifying the last digit of the received counterpart phone number after the counterpart phone number. And when the mobile communication terminal receives a signal indicating that the dial is terminated, requests the mobile communication terminal to dial a previously stored line automatic selection access number, and also starts dialing the access number in response to the request. Remind me when I receive a notification signal After waiting for a predetermined time as long as the dialed access number and the call can be connected in the same communication terminal, the other party's telephone number temporarily stored by adding the identification value to the mobile communication terminal is DTMF (Dual Tone Multi Frequency) And a wireless headset control unit for converting a signal to transmit a signal requesting transmission of the call to a connected network.

The method according to claim 1 or 3

The identification value is a line automatic selection device between the mobile communication terminal and the wireless headset, characterized in that consisting of any one of the special key value * or # of the mobile communication terminal

In the automatic method of selecting the line between the mobile terminal and the wireless headset

Transmitting a dial start notification signal to the wireless headset when the mobile terminal detects that the user starts dialing the other party's phone number in a standby mode connected to the wireless terminal by short-range wireless communication;

Requesting the mobile terminal for the other party's telephone number being dialed when the dial start notification signal is received by the wireless headset;

Identifying, by the portable terminal, the counterpart's telephone number being dialed according to the telephone number information request and transmitting the same to the wireless headset;

The wireless headset checks whether the received counterpart phone number matches a pre-stored rate reduction phone number list, and if there is a matching number, transmits a signal requesting the mobile terminal to terminate a dialing operation; Temporarily storing an identification value for identifying the last digit of the telephone number in the number after the counterpart telephone number;

Receiving the dialing end request signal from the portable terminal, ending the ongoing dialing operation and transmitting a signal indicating that the dialing is completed to the wireless headset;

Requesting the mobile terminal to dial a pre-stored access number for automatic line selection when the dialing end signal is received by the wireless headset;

Transmitting the dial start notification signal to the wireless headset while the mobile terminal dials the requested access number to connect a call;

When receiving the access number dial start notification signal from the wireless headset, the mobile terminal waits for a predetermined time for a predetermined time such that the access number and the call can be connected, and then adds the identification value and temporarily stores the other party's telephone number. Requesting the mobile terminal to transmit a dual tone multi frequency (DTMF) signal to the network to which the call is connected;

And converting the requested counterpart phone number into a DTMF signal and transmitting the DTMF signal to the network to which the call is connected.

The method of claim 5,

The wireless communication method between the portable terminal and the wireless headset is a line automatic selection method between the portable terminal and the wireless headset, characterized in that the Bluetooth communication.

The method of claim 5

The identification value is a line automatic selection method between the mobile terminal and the wireless headset, characterized in that any one of a special key value * or # of the mobile terminal.