JP2003110667A - Mobile phone and its external device connecting method, communication terminal system and its user identification method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mobile phone usable for voice input/output means (microphone and speaker) for a communication terminal system or the like. SOLUTION: The mobile phone is characterized in that it includes; a USB interface section 37 connected to a personal computer (PC) via a USB cable 4 to transmit/receive data and detect that the USB cable 4 is connected; and a changeover means that switches a connection destination of the microphone 33 and the speaker 35 to a wireless communication section 32 or the USB interface section 37. When it is detected that the USB cable 4 is connected to the PC, a CPU 31 switches the connection destination of the microphone 33 and the speaker 35 to the USB interface section 37.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication terminal system connected to a communication network providing a communication service such as an internet telephone, and more particularly, it can be used as a voice input / output means (microphone and speaker) of the communication terminal system. The present invention relates to a mobile phone, an external device connecting method thereof, a communication terminal system including the mobile phone, and a user specifying method thereof.

[0002]

2. Description of the Related Art In recent years, VoIP (Voice over Internet)
Internet telephones using Protocol) technology have become popular due to reasons such as low call charges. In the VoIP system that realizes this Internet telephone, the communication terminal system used by the user is usually composed of a communication terminal that executes dedicated software for realizing the VoIP function and a dedicated microphone / speaker system. . As the communication terminal, a portable terminal called a personal computer or a PDA (Personal Digital Assistants), a game terminal, or the like can be used.

Further, in the VoIP system, generally, the originating Internet telephone terminal (own station) notifies the relay server of the IP telephone number of the other party of the call, and the Internet telephone terminal (remote station) of the receiving party is called. IP (Internet P
rotocol) address is acquired, packet communication is performed with the partner station via the IP network using this IP address, and voice information is transmitted. For this purpose, the VoIP system is provided with a management server, which manages the IP address of the user and the MAC (Media Access Control) of the IP network interface.
l) The address is stored in association with the IP telephone number and UID (user identification information) of the user. Then, the relay server notifies the management server of the IP telephone number of the receiving side at the time of the internet telephone connection request from the transmitting side,
Obtain the IP address and MAC address of the called side.

Therefore, when using the Internet telephone, the user has his own UID, IP address and M
The AC address and IP telephone number are registered in advance in the management server. Also, an alternative telephone number (fixed telephone number, mobile telephone number, etc.) is registered for incoming calls when the Internet telephone is unavailable.

[0005]

However, in the above-mentioned conventional VoIP system, it is necessary for the communication terminal system to be provided with a dedicated microphone / speaker system, so that the user cannot use it easily. There's a problem. Therefore, it is desired to realize a mobile phone that can be used as a voice input / output unit (microphone and speaker) of a communication terminal system by connecting a mobile phone, which has been widely used as a familiar communication device, to a personal computer or the like.

Further, in the conventional VoIP system, the user needs to register the user-specific information such as the UID and the IP address in the management server in advance, but this registration procedure is troublesome. In order to solve this problem, there may be a method in which the communication terminal system automatically registers the user-specific information in the management server, but for this purpose, it is necessary to automatically identify the user himself. Therefore, it is desired to realize a communication terminal system that can automatically identify a user when using a communication service such as an Internet telephone.

The present invention has been made in consideration of such circumstances, and an object thereof is to provide a portable telephone which can be used as a voice input / output means (microphone and speaker) of a communication terminal system or the like and a method for connecting an external device thereof. To provide.

A further object of the present invention is to provide a communication terminal system and a user specifying method for automatically specifying a user when using a communication service such as an internet telephone. .

[0009]

In order to solve the above-mentioned problems, a mobile phone according to claim 1 is a wireless communication means for transmitting and receiving data wirelessly, and a voice sound transmitted by the wireless communication means. In a mobile phone having an input means and a voice output means, a transmission interface means for connecting to an external device via a transmission medium and transmitting / receiving data, and the transmission medium being connected, or the connection with the external device. When it is detected that the transmission means is connected to the detecting means for detecting that the audio input means and the external device are connected, the connection destination of the audio input means and the audio output means is changed to the wireless communication. It is characterized by comprising a switching means for switching from the communication means side to the transmission interface means side.

According to a second aspect of the present invention, there is provided an external device connecting method which comprises a mobile telephone having wireless communication means for wirelessly transmitting and receiving data, and voice input means and voice output means for voice transmitted by the wireless communication means. An external device connection method for connecting to an external device via a transmission medium, comprising the step of detecting in the mobile phone that the transmission medium has been connected or that the connection with the external device has been made, When it is detected that the transmission medium is connected or the connection with the external device is made in the mobile phone, the connection destination of the voice input unit and the voice output unit is changed from the wireless communication unit side to the external unit. It is characterized by including a process of switching to the device side.

According to a third aspect of the present invention, there is provided a communication terminal system, the mobile phone according to the first aspect, a communication terminal connected to a communication network that provides a communication service for a specific user, the mobile phone and the communication. In a communication terminal system including communication connecting means for connecting terminals, at least one of the mobile phone, the communication terminal, and the communication connecting means is provided with a recording means in which user identification information is preset, The terminal is characterized by reading the user identification information from the recording means and using it as identification information of the specific user.

A communication terminal system according to a fourth aspect is the communication terminal system according to the third aspect, wherein the communication connecting means is a communication cable having the recording means,
When the communication terminal detects that the communication cable is connected, the communication terminal reads the user identification information from the recording means.

According to a fifth aspect of the present invention, there is provided a user identifying method, the mobile phone according to the first aspect, a communication terminal connected to a communication network for providing a communication service for a particular user, the mobile phone and the mobile phone. A method for identifying a user in a communication terminal system comprising communication connecting means for connecting a communication terminal, wherein the recording means included in at least one of the mobile phone, the communication terminal, or the communication connecting means is preliminarily stored in the communication terminal. It is characterized by including a user identification information reading process of reading the set user identification information and a process of using the read user identification information as the identification information of the specific user in the communication terminal. .

A user identifying method according to a sixth aspect is the user identifying method according to the fifth aspect, wherein the communication connecting means is a communication cable having the recording means, and the user identifying information reading process. Includes a process of detecting that the communication cable is connected, and a process of, when the connection of the communication cable is detected, reading user identification information preset in a recording unit of the communication cable. It is characterized by

[0015]

DETAILED DESCRIPTION OF THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of a communication terminal system according to an embodiment of the present invention. The communication terminal system shown in FIG. 1 includes a personal computer (PC) 1, a mobile phone 3, and these PCs.
1 and a USB cable 4 connecting the mobile phone 3. The PC 1 is a communication network (V) that provides a communication service (Internet phone, etc.) for specific users.
connected to an oIP network or the like).

The PC 1 has a user automatic registration device 2 for automatically registering user-specific information in a management device for managing users of the internet telephone service, and a VoIP process as a main body having an internet telephone function to perform an internet telephone call. And a communication unit 24 that establishes a communication line for connecting to a VoIP network via the Internet or the like and performs data communication.

The user automatic registration device 2 includes a registration processing unit 21 for automatically registering user-specific information in a management device for managing users of the Internet telephone service.
A USB interface unit 22 having a USB interface function and to which the USB cable 4 is connected is provided. The USB interface unit 22 has a detection function of detecting that the USB cable 4 is connected, and a USB cable 4
It also has a function of reading the information recorded in the recording unit 25.

The user automatic registration device 2 is, for example,
It is configured as a function expansion board that can be mounted in the function expansion slot of the PC 1. In addition, the VoIP processing unit 23
It is composed of a CPU (central processing unit) of C1 and a memory, and realizes the function by loading a program for realizing the VoIP function into the memory and executing the program.

The mobile telephone 3 can be used as a voice input / output means (microphone and speaker) of a communication terminal system or the like, and is used as an internet telephone handset in this embodiment. The mobile phone 3 includes a CPU 31 that controls each circuit unit, a wireless communication unit 32 having a wireless phone function, a microphone 33, and a microphone 33.
An analog / digital converter 34 for converting the analog audio signal input to the digital signal into a digital signal, a speaker 35,
Speaker 3 by converting digital audio signal to analog signal
5 to digital / analog converter 36 and USB
A USB interface unit 37 having an interface function, to which the USB cable 4 is connected, and connection destinations of the microphone 33 and the speaker 25 are the wireless communication unit 32 or the US.
It is composed of a switching unit 38 for switching to one of the B interface units 37.

The USB interface section 37 is a US
It also has a detection function of detecting that the B cable 4 is connected. A display unit, an operation unit, and the like included in a normal mobile phone are not shown in FIG. 1 and are omitted.

The USB cable 4 is a communication cable that connects the PC 1 and the mobile phone 3, and is a U cable in this embodiment.
A USB cable used for an SB (Universal Serial Bus) interface is used. USB cable 4
Includes a recording unit 25 in which user identification information is set in advance.

A non-volatile memory or the like can be used as the recording unit 25. In addition, the recording unit 25, for example,
It is arranged inside the connector for connection of the USB cable 4. The recording unit 25 is provided with wiring that can be connected to the outside, and the user identification information of the recording unit 25 can be read from the outside. When connecting the PC 1 and the mobile phone 3 with the USB cable 4, as shown in FIG. 1, the wiring of the recording unit 25 is the USB interface unit 22 of the user automatic registration device 2.
To be connected to.

User identification information is set in the recording section 25 of the USB cable 4 when the cable is manufactured.
This user identification information is unique to each cable.
Therefore, the Internet telephone service user who uses the USB cable 4 can be identified by the user identification information of each USB cable 4. This user identification information is a global IP
Address is available.

Further, in the present embodiment, the USB cable is used as the communication cable for connecting the PC 2 and the mobile phone 3, but another communication interface (RS-
A communication cable for 232C or IEEE 1394) may be used.

FIG. 2 is a sequence diagram showing the flow of processing when connecting the PC 2 and the mobile phone 3 in the communication terminal system shown in FIG. Referring to FIG. 2, an operation when the user uses the mobile phone 3 as a voice input / output unit (microphone and speaker) of the communication terminal system,
The operation of automatically identifying the user by the PC 3 when using the Internet telephone will be described.

First, the user, as shown in FIG.
The PC 1 and the mobile phone 3 are connected using the SB cable 4. With this connection, the USB interface unit 37 of the mobile phone 3 detects that the USB cable 4 is connected and notifies the CPU 31 of the connection. The CPU 31 connects to the microphone 33 and the speaker 25 as shown in FIG. The switching section 38 is switched so that the USB interface section 37 is set to (steps SP1 and SP2 in FIG. 2).

On the other hand, in the PC 1, the USB cable 4
The USB interface unit 22 of the user automatic registration device 2 connected to detects the connection of the USB cable 4 and notifies the registration processing unit 21 of it. Upon receiving this notification, the registration processing unit 21 reads the user identification information (UID) from the recording unit 25 of the USB cable 4 via the USB interface unit 22 (steps SP3 to SP in FIG. 2).
5). The registration processing unit 21 uses the read UID as identification information for identifying the user of the Internet telephone service. In this way, the user can
The user can be automatically specified when using the Internet telephone service simply by connecting the PC to the PC 1.

Further, as described above, the analog voice signal input from the microphone 33 is digitized by the analog / digital converter 34 because the switching unit 38 of the mobile phone 3 is switched to the USB interface side. After that, the data is output to the PC 1 via the USB cable 4 by the USB interface unit 37 and input to the VoIP processing unit 23 via the USB interface unit 22 of the PC 1.

On the other hand, the digital audio signal output from the VoIP processing section 23 is transferred to the USB interface section 3 via the USB cable 4 by the USB interface section 22.
After being input to 7, and converted into analog by the digital-analog converter 36, it is input to the speaker 35 and reproduced as voice. As a result, the mobile phone 3 can be used as a voice input / output unit (microphone and speaker) of the communication terminal system.

Next, a VoIP system using the communication terminal system shown in FIG. 1 will be described. FIG. 3 is a block diagram showing a configuration example of a VoIP system using the communication terminal system shown in FIG. In FIG. 3, parts corresponding to the respective parts in FIG. 1 are designated by the same reference numerals, and description thereof will be omitted. Reference numeral 5 is a computer network called the Internet capable of transmitting data. Code 6
Is a management server that performs registration processing of user-specific information of Internet telephone service users, and manages users of the Internet telephone service. Reference numeral 7 is a relay server that performs relay processing for connection to the Internet telephone. Reference numeral 8 is an Internet telephone terminal.

The PC 1, the management server 6, the relay server 7, and the Internet telephone terminal 8 are each connectable to the Internet 5 via a communication line. Also,
The PC 1, the management server 6, the relay server 7, and the Internet telephone terminal 8 can access each other via the Internet 5. The management server 6
The relay server 7 uses the Internet 5 as a data transmission network to construct a VoIP network.

Next, referring to FIG. 4, the VoI shown in FIG.
The operation of the P system when the user makes an internet call will be described. FIG. 4 is a flowchart showing a flow of user registration processing and Internet telephone connection processing performed by the VoIP system shown in FIG. In the following description, the PC 1, the management server 6, the relay server 7, and the Internet telephone terminal 8 are each connected to the Internet 5, but unless otherwise specified, data etc. can be sent and received via the Internet 5. Shall be given.

First, when the user connects the PC 1 and the mobile phone 3 by using the USB cable 4 as shown in FIG. 1, the mobile phone 3 is processed by the process shown in FIG.
Can be used as a voice input / output unit (microphone and speaker) of the communication terminal system. Also, PC
The registration processing unit 21 of No. 1 uses the user identification information (UID) read from the USB cable 4 as identification information for identifying the user of the Internet telephone service (FIG. 4).
Step S1).

Next, the registration processing unit 21 notifies the management server 6 of the user registration request through the communication unit 24 (FIG. 4).
Step S2). After receiving the registration request, when the management server 6 is ready for the registration process, the management server 6 notifies the PC 1 of registration preparation OK (step S3 in FIG. 4). Next, the registration processing unit 21 reads the UID read from the USB cable 4.
The user unique information associated in advance with the UID is notified to the management server 6 together with the UID (step S4 in FIG. 4).

Here, the user unique information notified by the registration processing unit 21 may be set in the registration processing unit 21 in advance in association with the UID, or the VoIP processing unit 23.
May be set in advance in association with the UID, and the registration processing unit 21 may obtain it from the VoIP processing unit 23. Further, the user unique information includes an IP address, an alternative telephone number, and the like. The alternative telephone number is used for an incoming call in a situation where the Internet telephone is unavailable, and a fixed telephone number, a mobile telephone number, etc. can be used. The U recorded on the USB cable 4
When the ID is the global IP address, this global IP address is used as the IP address of the user unique information.

Next, the management server 6 stores the notified user unique information in association with the UID. Further, a unique IP telephone number is assigned to the user, and this IP telephone number is also stored in association with the user unique information. After the completion of the registration process, the management server 6 notifies the PC 1 of the registration confirmation (step S5 in FIG. 4). At the time of this notification, the IP telephone number assigned to the user may be notified. This completes the user registration process. As described above, according to this embodiment, it is possible to automatically register the user-specific information in the management server 6 that manages the user, without requiring the user to perform a registration operation or the like.

Next, when the user inputs the IP telephone number of the other party (other party's IP telephone number) and makes a call, the PC 1
The VoIP processing unit 23 notifies the relay server 7 of the input partner IP telephone number by the communication unit 24 and makes a connection request (step S6 in FIG. 4). The IP telephone number may be input using the keyboard of the PC 1, or the CPU 31 may output the IP telephone number input using the ten-key pad on the operation unit of the mobile phone 3.
The SB interface unit 37 may output to the PC 1 via the USB cable 4 and the VoIP processing unit 23 may receive the IP telephone number via the USB interface unit 22.

Next, the relay server 7 confirms with the management server 6 whether or not the notified IP telephone number of the other party is registered for use (step S7 in FIG. 4). Management server 6
If the other party's IP telephone number is registered, is the other party's IP address (other party's IP address) corresponding to the other party's IP telephone number.
Address) to the relay server 7 (step S8 in FIG. 4).

Next, the relay server 7 notifies the notified partner IP address to the PC 1, and the VoIP processing unit 23 of the PC 1 uses the partner IP address to send the H. A connection request according to the H.323 recommendation is made (steps S9 and S10 in FIG. 4). In addition, H.
The H.323 recommendation is one of the so-called ITU-T recommendations being promoted by the standardization division of ITU (International Telecommunication Union), and defines the standard for multimedia communication standardization. This H. There is a description about VoIP in the part related to voice transmission in the H.323 recommendation.

Then, the Internet telephone terminal 8 receives the H.264 request in response to the connection request. When the connection response according to the H.323 recommendation is made, the PC 1 (own station) and the Internet telephone terminal 8 (remote station) are in a state of telephone connection via the Internet 5. In this telephone connection state, the voice signal input from the microphone 33 of the mobile phone 3 is the VoIP of the PC 1.
It is transmitted to the processing unit 23 and transmitted to the Internet telephone terminal 8. The voice signal transmitted from the Internet telephone terminal 8 and received by the VoIP processing unit 23 is transmitted to the mobile telephone 3 and reproduced by the speaker 35.
As a result, the user of the own station can use the mobile phone 3 as a handset to make a telephone call via the Internet phone.

Next, the internet telephone connection processing when the IP telephone number of the other party is not registered as a result of the IP registration confirmation in step S7 will be described. FIG. 5 shows a configuration example of a VoIP system corresponding to this case. Further, FIG. 6 shows a flow of the Internet telephone connection processing when the partner IP telephone number is not registered. As shown in FIG. 5, the telephone 10 of the partner station is connected to the circuit switching network 9. The relay server 7 is also connected to the circuit switching network 9.

In step S7 of FIG. 6, the relay server 7 determines whether the usage registration of the partner IP telephone number is registered or not.
If it is not registered as a result, the management server 6 determines the alternative telephone number of the partner station (telephone number of the telephone 10).
To the relay server 7 (step S21 in FIG. 6).
Next, the relay server 7 uses the alternative telephone number to make a call to the circuit switching network 9 and, when there is an incoming call response from the telephone 10, notifies the PC 1 of a connection confirmation indicating that connection with the partner station is possible. , PC1 telephone line (via IP network 5) and telephone 10
The relay operation between the telephone lines on the side (via the circuit switching network 9) is started (steps S22 to S24 in FIG. 6).

As a result, the PC 1 (own station) and the relay server 7 are in a state of telephone connection via the Internet 5, and the relay server 7 and the telephone 10 (counter station) are telephone-connected via the circuit switching network 9. The intermediate state is entered, and the relay operation of the relay server 7 enables a call between the PC 1 (own station) and the telephone 10 (remote station).

In the above-described embodiment, the USB cable 4 is used to identify and identify the Internet telephone service user, but identification of an individual by the USB cable 4 is similarly applied to other uses. It is possible.

Further, in the above-described embodiment, the communication cable (USB cable) is used as the communication connecting means for connecting the external device (PC1) and the mobile phone 3, but the communication cable is connected to the external device by wireless communication such as Bluetooth. The mobile phone 3 may be connected. In this case, the mobile phone 3 is provided with a wireless communication means such as Bluetooth as a transmission interface means, and when it is detected that the connection with an external device is made by the wireless communication means, the CPU 31 of the mobile phone 3 receives a voice input. The connection destination of the output means (microphone and speaker) is switched to the wireless communication means side.

Similarly, the communication terminal (PC1) is also equipped with wireless communication means such as Bluetooth, and when it is detected that the connection with the mobile phone is made by this wireless communication means,
The communication terminal reads out the user identification information preset in the recording means provided in any one of the mobile phone, the own communication terminal, and the wireless communication means. In addition, the wireless communication means provided in the mobile phone and the communication terminal,
It corresponds to the communication connection means.

The medium for transmitting a radio signal when connecting the mobile phone and the external device by the communication cable or the wireless communication corresponds to the transmission medium for transmitting the data between the mobile phone and the external device.

Although the embodiment of the present invention has been described in detail above with reference to the drawings, the specific configuration is not limited to this embodiment, and design changes and the like within the scope not departing from the gist of the present invention. included.

[0049]

As described above, according to the portable telephone of the present invention, the transmission interface means for connecting to the external device via the transmission medium and transmitting / receiving the data, and the transmission medium being connected, or Detection means for detecting that a connection with an external device has been made, and that the transmission medium has been connected,
Alternatively, when it is detected that the connection with the external device is made, the switching means for switching the connection destinations of the voice input means and the voice output means to the transmission interface means side is provided. It can be used as an input / output unit (microphone and speaker).

As a result, the user can easily connect the portable telephone, which has been widely used as a familiar communication device, to a personal computer or the like and use it as a voice input / output means (microphone and speaker) of a communication terminal system or the like. become able to. For example, it can be applied to a communication terminal used for an internet telephone as in the above-described embodiment or a communication competition game terminal. In addition, it does not have a communication function and can be used independently (game machine, PDA
Etc.) can be similarly applied.

A communication terminal system according to the present invention includes the mobile phone according to claim 1, a communication terminal connected to a communication network that provides a communication service for a specific user, and the mobile phone and the communication terminal. Comprising communication connection means for connection, at least one of the mobile phone, the communication terminal, and the communication connection means is provided with a recording means in which user identification information is preset, and the communication terminal is provided with this recording means. Since the user identification information is read from and used as the identification information of the specific user, the user can be automatically specified when using the communication service such as the Internet telephone.

As a result, when using a communication service such as a VoIP system, the communication terminal system can automatically register user-specific information such as a UID and an IP address in the management server. As a result, the user does not have to take the time and effort required for registration, which is advantageous in improving the convenience of the user.

Further, in the VoIP system, since the user of the Internet telephone can be specified,
The effect is that it becomes easy to identify the user when collecting the amount equivalent to the use of the local network when using a call between the Internet and the PSTN (public telephone network). For example, it is possible to easily realize collective management of communication usage charges in a mobile phone usage fee payment account and identification of dial-up users using device authentication.

Furthermore, if a communication cable having a recording means is used as the communication connecting means and the communication terminal detects that the communication cable is connected, the user identification information is read from the recording means, the present invention is realized. It is possible to realize the above communication terminal system with a simple configuration.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a communication terminal system according to an embodiment of the present invention.

FIG. 2 shows a PC 2 in the communication terminal system shown in FIG.
FIG. 8 is a sequence diagram showing a flow of processing when connecting the mobile phone 3 and the mobile phone 3;

3 is a VoI using the communication terminal system shown in FIG.
It is a block diagram which shows the structural example of a P system.

FIG. 4 is a flowchart showing a flow of user registration processing and Internet telephone connection processing performed by the VoIP system shown in FIG.

5 is a VoI using the communication terminal system shown in FIG.
It is a block diagram which shows the other structural example of P system.

6 is a flowchart showing the flow of user registration processing and Internet telephone connection processing performed by the VoIP system shown in FIG.

[Explanation of symbols]

1 ... Personal computer (PC), 2 ... User automatic registration device, 3 ... Mobile phone, 4 ... USB cable, 5 ...
Internet, 6 ... Management server, 7 ... Relay server, 8
... Internet telephone terminal, 9 ... Circuit switching network, 10 ... Telephone, 21 ... Registration processing unit, 22, 37 ... USB interface unit, 23 ... VoIP processing unit, 24 ... Communication unit, 25
... Recording unit, 31 ... CPU, 32 ... Wireless communication unit, 33 ...
Microphone, 34 ... Analog / digital converter, 35 ... Speaker, 36 ... Digital / analog converter, 38 ... Switching part.

Claims (6)

[Claims] 1. A mobile phone having a wireless communication unit for wirelessly transmitting and receiving data, and a voice input unit and a voice output unit for voice transmitted by the wireless communication unit, which is connected to an external device via a transmission medium. A transmission interface means for transmitting and receiving data, a detection means for detecting that the transmission medium is connected, or a connection with the external device, and the transmission medium being connected, or the external device Switching means for switching the connection destination of the voice input means and the voice output means from the wireless communication means side to the transmission interface means side when it is detected that the connection has been made. Mobile phone. 2. A mobile phone having a wireless communication means for transmitting and receiving data wirelessly, and a voice input means and a voice output means for voice transmitted by the wireless communication means is connected to an external device via a transmission medium. A method of connecting an external device, comprising the step of detecting that the transmission medium is connected to the mobile phone or that the connection to the external device is made, and the transmission medium is connected to the mobile phone. Or a connection with the external device is detected, the process of switching the connection destination of the audio input unit and the audio output unit from the wireless communication unit side to the external device side. An external device connecting method characterized by the above. 3. The mobile phone according to claim 1, a communication terminal connected to a communication network that provides a communication service for a specific user, and a communication connection unit that connects the mobile phone and the communication terminal. In the communication terminal system, at least any one of the mobile phone, the communication terminal, or the communication connection unit includes a recording unit in which user identification information is set in advance, and the communication terminal is a user from the recording unit. A communication terminal system, wherein identification information is read out and used as identification information of the specific user. 4. The communication connection means is a communication cable having the recording means, and the communication terminal reads out the user identification information from the recording means when detecting that the communication cable is connected. The communication terminal system according to claim 3, which is characterized in that. 5. The mobile phone according to claim 1, a communication terminal connected to a communication network that provides a communication service for a specific user, and a communication connection unit that connects the mobile phone and the communication terminal. A method for identifying a user in a communication terminal system, wherein in the communication terminal, user identification information preset in a recording means included in at least one of the mobile phone, the communication terminal, and the communication connection means is read out. And a step of using the read user identification information as the identification information of the specific user in the communication terminal. 6. The communication connection means is a communication cable having the recording means, and in the user identification information reading step, a process of detecting that the communication cable is connected, and a connection of the communication cable are performed. The method for identifying a user according to claim 5, further comprising: a process of reading user identification information preset in a recording unit of the communication cable when detected.