JPH0846566A - Mobile object data communication system - Google Patents

Abstract

PURPOSE:To attain data communication by providing an interface device and a portable telephone set operated in the voice band, digital and analog mode with an instruction from an information processing unit so as to connect an information processing unit and the digital portable telephone set regardless of the analog or digital system. CONSTITUTION:The voice band mode is set to a controller 12a of an interface device 12 by an information processing unit 10. A switch circuit 12e is thrown to the position (b) and a switch circuit 12f is thrown to the position (a). Furthermore, a controller 12a sends an instruction to throw the switch circuits 14a, 14g respectively to the positions b, a to a CPG 14c via an SIO 14b of a digital mode telephone set 14 via a data link section 12d to make changeover. The transmission data from the unit 10 are given to a MODEM 12b via the controller 12a and modulated into a voice band analog signal and given to a PCM CODEC 12c and converted into a digital signal and given to an ADPCM CODEC 14h of the portable telephone set 14 via a digital signal line 22. The CODEC 14f compresses the signal and converts it into an ADPCM digital signal and the result is sent to a base station 15 from an antenna 14j.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile data communication system for performing data communication by an information processing device such as a personal computer or a word processor device via a mobile station such as a mobile phone using a wireless transmission path.

[0002]

2. Description of the Related Art Conventionally, an analog mobile phone using a wireless transmission line, for example, a mobile phone called a cellular phone,
When data communication is performed by connecting a mobile radio station called a mobile terminal of a mobile phone or a cordless phone handset to an information processing device such as a personal computer or a word processor device (hereinafter abbreviated as personal computer or word processor), The modular jack, which is the output terminal to the public network of the modem device connected to the processing device, and the microphone earphone jack for analog signals of mobile radio stations were connected by a cable, and communication was performed with analog voice band signals. .

In a digital cellular phone such as a digital cellular phone or a digital cordless phone, a modem device is attached to an information processing device to convert digital data into a voice band signal, and a modem device having the same standard as a modem device called an adapter. With a device that has a built-in data link unit that establishes a link with the communication destination and sends and receives data,
Data communication is performed by returning the signal in the voice band to the original digital signal and connecting it to the digital mobile phone via the data link unit.

By the way, in recent years, a portable telephone PH
S (Personal Handy Phone System) has been developed. The simplified mobile phone PHS is capable of digital communication. In the case of performing data communication using the simplified mobile phone PHS, the same forms as the above-described analog mobile phone system and digital mobile phone system such as digital cellular are considered.

That is, in the same form as the analog mobile phone, a modem device is attached to the information processing device to convert digital data into a voice band signal, and the digital data is provided in the mobile station of the simplified mobile phone PHS via a cable. Connect to the microphone / earphone jack.

In the same form as a digital form telephone,
Since the handheld mobile phone PHS performs digital communication, it is planned to have a digital interface. However, a modem device is attached to the information processing device to convert digital data into a voice band signal, and a digital signal is sent via an adapter. Return to and connect to the digital interface.

[0007]

As described above, in the simplified portable telephone PHS, a method similar to that of a digital portable telephone such as an analog portable telephone or a digital cellular telephone is considered when performing data communication. .

The problem with the analog system is that since it is necessary to use the microphone / earphone jack of the mobile phone (mobile station), a cable for connecting to the microphone / earphone jack is required. The PHS mobile phone will be equipped with a digital interface for connecting to an information processing device.
In addition to the device for connecting to the digital interface, a cable for connecting the analog signal of the modem to the microphone earphone jack is required.

The problem with the digital system is that since the modem device of the same standard exists in both the information processing device and the adapter, the device becomes large and it becomes difficult to make it an IC card type, for example. Further, since the analog method and the digital method are different, it is difficult to develop an IC card type device using both.

The present invention has been made in consideration of the above circumstances, and is not limited to an analog system or a digital system, and an information processing device and a mobile communication device (digital mobile phone) are connected to each other to perform data communication. It is an object of the present invention to provide a mobile data communication system capable of performing.

[0011]

The present invention is connected to an information processing apparatus for performing data communication via a wireless transmission line between a base station and a mobile station, and is connected to the information processing apparatus. A modem that modulates and demodulates data input and output by
Conversion means for performing analog / digital conversion on data modulated / demodulated by the modem; an interface for inputting / outputting data analog / digital converted by the conversion means with the mobile station; A control means for controlling the operation of the mobile station based on an instruction from the device, and inputting / outputting data to / from the mobile station by a digital signal.

Further, the conversion means further has a function of compressing and coding data. The present invention is also connected to an information processing device that performs data communication via a wireless transmission line between a base station and a mobile station, and modulates / demodulates data input / output with the information processing device. An interface for performing input / output of data to / from which the analog / digital conversion is performed by the conversion means and a conversion means for performing analog / digital conversion on the data modulated / demodulated by the modem. And a data link means for establishing a link with the other party of communication via the mobile station and exchanging data with a digital signal, and the interface between the data link means or the conversion means. Selecting means for selecting a connection; and controlling means for controlling the operation of the mobile station and the selecting means based on an instruction from the information processing device. It is further characterized in that it is selected whether data is transmitted / received to / from the information processing device via the modem, the conversion means, and the mobile station, or via the data link means and the mobile station. To do.

Further, it is connected to an information processing apparatus for performing data communication via a wireless transmission line between the base station and the mobile station, and modulation / demodulation of data inputted / outputted to / from the information processing apparatus. And a conversion means for performing analog / digital conversion on the data modulated and demodulated by the modem, and a first selection means for selecting connection with the modem to either the conversion means or an external output. ,
A link is established between the interface for performing analog / digital conversion of the data by the conversion means with the mobile station and a communication partner side via the mobile station, and the data is converted into a digital signal. Based on an instruction from the information processing device, a data link means for exchanging data, a second selecting means for selecting the connection with the interface to either the data link means or the converting means, and the mobile station. And the control means for controlling the first selection means and the second selection means, and data is exchanged with the information processing apparatus via the modem, the conversion means, and the mobile station. It is characterized in that it is selected from among the data link means, the mobile station, and the modem.

Further, the interface device has a connector for connecting to the modem, the conversion means, and the data link means, and the modem is connected by connecting the connector for external connection to the mobile station. It is characterized in that the conversion means and the data link means are connected by connecting a connector for use.

Further, the present invention is for performing data communication with the base station via a wireless transmission path, and an interface capable of inputting and outputting control signals and digital signals with an external device; and the interface. A radio unit that transmits and receives a digital signal between the base station and the base station via a radio transmission path, a voice conversion unit that includes a microphone that converts voice into an analog signal and a speaker that converts the analog signal into voice. Switching between disconnection and connection between a conversion unit that performs analog / digital conversion on a signal exchanged between the interface and the voice conversion unit, and the interface and the conversion unit or the wireless unit, Based on a switch means for changing the path of the digital signal and a control signal from an external device input via the interface, And control means for switching the switch means, when said transmitting and receiving external device and the digital signal data, characterized by cutting the said microphone speaker from the wireless unit.

Further, the portable telephone device further comprises compression coding means connected to the radio section, for compressing and coding a digital signal input / output via the interface. A compression-encoded digital signal is transmitted to and received from the base station via the wireless unit.

[0017]

Since the modem for modulating / demodulating the data (digital data) output from the information processing device and the converting means for performing the A / D conversion are provided, the modem by the information processing device is connected to the information processing device. Data can be sent to the mobile station (digital mobile phone) as a digital signal under the general control of the system configuration. Therefore, a modem for converting an analog modem signal into a digital signal is unnecessary (it is not necessary to provide two modem devices of the same standard in the system).

When PHS is used for the wireless communication between the base station and the mobile station, it is carried out after compression coding by ADPCM. Therefore, by having the compression encoding function on the interface device side, even if the mobile station (digital mobile phone) does not have this function, data communication is possible by securing the route that is sent out directly through the wireless transmission line. Becomes

Data can be exchanged with the information processing device via a modem or directly by digital signals input / output to / from the information processing device. Further, it is possible to input / output data to / from the information processing device from / to an external device via a modem. Therefore, by providing a network control device having an NCU as an external device, connection with the general telephone switching network becomes possible. Also, NC
By providing U in an external device, the interface device capable of analog / digital signal input / output can be configured as an IC card type.

Further, the interface device connected to the information processing device has a common connector for inputting / outputting analog signals, digital signals and control signals, and an analog signal or digital signal connector is integrated. By selecting the cable, it is possible to select, for example, whether to connect the network control device (analog) or the mobile station (mobile phone device).

When data communication is performed by the information processing device, the information processing device is connected to the other party via the interface device, the mobile station (radio transmission line), and the base station. At this time, when the mobile station is a mobile phone device for making a voice call, disconnecting the speaker and the microphone for making a call does not affect the data communication by the digital signal through the above-mentioned path.

Further, by providing the mobile phone device (mobile station) with the compression encoding means, even if the data is transmitted and received by the digital data which is not compression encoded, for example, compression encoding (ADPCM system: adaptive differential pulse) It becomes possible to transmit digital data to and from the base station by PHS which performs data transmission by the code modulation method).

[0023]

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 mobile data communication system according to an embodiment of the present invention. In this embodiment, a personal handy phone system PHS (Personal Handy Phone Sys
tem) is used.

As shown in FIG. 1, the mobile data communication system of this embodiment comprises an information processing device 10, an interface device 12, a digital mobile phone 14 (mobile station), and a base station 15. A network control device 16 is provided as needed.

The base station 15 is connected to a line 17 (public network, etc.), and when a call is made from the digital portable telephone 14 by a normal telephone function, a call is made to the other party via the base station 15 and the line 17. be able to. In addition, the information processing device 10 can perform data communication with a partner connected by a line 17 via the interface device 12, the digital mobile phone 14, and the base station 15.

The interface device 12 is a device for connecting the information processing device 10 and the digital mobile phone 14 to enable data communication. As shown in FIG. 1, the interface device 12 is a controller 12a, a modem 12b, and a PCM codec 12.
c, the data link unit 12d, and the switch circuits 2e and 2
It is composed of f.

The interface device 12 is, for example, an IC card type and is provided in the information processing device 10.
It can be used by mounting it in a card slot (not shown). That is, since the portion having a relatively large mounting volume is externally attached as the network control device 16, the IC
Can be made into a card.

The controller 12a is the information processing device 10.
Input / output of digital data to / from the interface device 12 and control of the entire interface device 12 (switch circuits 2e, 2
(including switching control for f). The controller 12a outputs the digital data output from the information processing device 10 to the modem 12b or the data link unit 12d.

The modem 12b is provided between the controller 12a and the switch circuit 2e, and is connected to the controller 12a.
The modulation / demodulation is performed on a signal input / output between the information processing devices 10 via the.

The PCM codec 12c is provided between the switch circuit 2e and the switch circuit 2f and performs A / D conversion or D / A conversion. The data link unit 12d is
It is connected to the controller 12a, the switch circuit 2f, and the digital mobile phone 14, controls the digital mobile phone 14 (commands to the CPU 14c) under the control of the controller 12a, and is the same as that provided in the base station 15. A wireless link is established with a data link unit (not shown) having the function of (1) to transmit and receive data.

The switch circuit 2e is the controller 12a.
Under the control of the modem 12b and the PCM codec 1
The connection path is switched to an external device (network control device 16) via 2c or the analog signal line 24.

The switch circuit 2f is the controller 12a.
Under the control of (1), the connection path between the PCM codec 12c or the data link unit 12d and the digital mobile phone 14 is switched via the digital signal line 22.

The digital mobile phone 14 performs digital communication with the base station 15 via a wireless transmission line.
The interface device 1 is operated via a telephone function provided in the telephone or via the mobile telephone control line 20.
The operation is controlled by the control signal from 2 (data link unit 12d). As shown in FIG. 1, the digital mobile phone 14 includes a switch circuit 14a, a SIO (serial data control logic circuit) 14b, a CPU 14c, and a speaker 14.
d, microphone 14e, PCM codec 14f, switch circuit 14g, ADPCM (adaptive differertial puls)
e code modulation) Codec 14h, wireless unit 14
i and the antenna 14j.

The switch circuit 14a is under the control of the CPU 14c, the interface device 12 via the digital signal line 22, the switch circuit 14g, or the radio section 1.
The connection path is switched to 4 g.

The SIO 14b is a mobile phone control line 20.
Interface device 12 (data link unit 12
d) is provided between the CPU 14c and the CPU 14c, and performs conversion between serial data on the data link unit 12d side and parallel data on the CPU 14c side.

The CPU 14c controls the entire digital portable telephone 14, and controls each part according to a signal given from the interface device 12 via the SIO 14b and the portable telephone control line 20.

The speaker 14d outputs a voice for using the telephone function, is connected to the PCM codec 14f, and converts an analog signal into a voice. The microphone 14e is for inputting voice to use the telephone function, is connected to the PCM codec 14f, and converts the voice into an analog signal.

The PCM codec 14f is provided between the switch circuit 14g and the speaker 14d and the microphone 14e and performs A / D conversion or D / A conversion. The switch circuit 14g, under the control of the CPU 14c, ADP
CM codec 14h and switch circuit 14a or P
The connection path is switched to the CM codec 14f.

The ADPCM codec 14h is the radio section 1
4i and the switch circuit 14g, the wireless unit 1
4i side PCM signal and switch circuit 14g side ADPC
The M signal is converted.

The radio section 14i includes a switch 14a and an AD.
It is connected to the PCM codec 14h and establishes a wireless transmission path with the wireless section of the base station 15 to transmit and receive signals. The network control device 16 is for connecting to the interface device 12 and the general switched telephone network, and includes a switch circuit 12e of the interface device 12 and an analog signal line 24.
Connected through. As shown in FIG. 1, the network control device 16 includes an NCU (Network Control Unit) 16a and a modular jack 16b.

The NCU 16a is a modular jack 16
A general telephone exchange network via b and an interface device 12
Of the analog signal line 24 is controlled. The modular jack 16b is for connecting a telephone line from a general telephone exchange network.

Next, a connection form between the interface device 12 and the digital mobile phone 14 or the network control device 16 will be described. Interface device 1 in this embodiment
As shown in FIG. 2, the connector 30 of No. 2 is common so that both the connector 32 for connecting the digital mobile phone 14 and the connector 34 for connecting the network control device 16 can be used. .

As shown in FIG. 2, the interface device 1
The second connector 30 is provided with a digital signal line 22 for connecting to the digital mobile phone 14, a mobile phone control line 20, and an analog signal line 24 for connecting to the network control device 16.

The connector 32 for connecting the digital mobile phone 14 is provided with a terminal for the mobile phone control line 20 and a terminal for the digital signal line 22, and for connecting with the digital mobile phone 14 via a cable. Connector 36 is integrally provided. Similarly, the connector 36 is provided with a terminal for the mobile phone control line 20 and a terminal for the digital signal line 22.

The connector 34 for connecting the network control device 16 is provided with terminals for the analog signal line 24, and the main body of the network control device 16 is integrally provided via a cable.

As shown in FIG. 2, the digital mobile phone 14
Connector 32 for the network control device 16
Both are configured to be connectable to the connector 30 of the interface device 12. Therefore, the user may use the cable for connecting to the digital mobile phone, which includes the connector 32 and the mobile phone connector 32, or the connector 34.
It is possible to select and use the device for connecting to the general exchange telephone network, which is composed of the network controller 16 and the network controller 16.

When the interface device 12 is an IC card type, it is difficult to store the network control device 16 in the card. Therefore, the network control device 16 is externally attached to the IC card, and the connector 34 for the network control device 16 is selected and used in the analog mode.

Next, FIG. 3 shows a form in which the interface device 12 is built in the information processing device 10. As shown in FIG. 3, by incorporating the interface device 12, it is integrated with the information processing device 10. This allows
It is not necessary to prepare the interface device 12 as a separate device, and the device configuration can be simplified.

Next, the operation of this embodiment will be described.
The mobile data communication system according to this embodiment has three operation modes. First, a voice band mode in which data flows to the base station 15 via the information processing device 10, the controller 12a, the modem 12b, the PCM codec 12c, the ADPCM codec 14h, the wireless unit 14i, and the antenna 14j. Secondly, the information processing device 10, the controller 12a, the data link unit 12d, and the wireless unit 14.
i, a digital mode in which data flows to the base station 15 via the antenna 14i. Third is an analog mode in which data flows to the general public circuit via the information processing device 10, the controller 12a, the modem 12b, and the network control device 16. Each operation mode will be described with reference to the flowchart.

Details of the voice band mode will be described below with reference to the flowchart shown in FIG. The information processing device 10 sets the voice band mode to the controller 12a of the interface device 12 by a predetermined command or the like (step A1). Controller 12a
Switch circuit 12 when set to voice band mode.
e is held on the b side (PCM codec 12c side) and the switch circuit 12f is held on the a side (PCM codec 12c side) (steps A2 and A3).

Further, the controller 12a uses the data link unit 12b, through the mobile phone control line 20, through the SIO 14b of the digital form telephone 14,
An instruction to hold the switch circuit 14a on the b side and the switch circuit 14g on the a side is sent to the CPU 14c (step A4). The CPU 14a sets the switch circuit 14a to the b side (switch circuit 14g side) and the switch circuit 14g to the a side (A
It is switched to the DPCM codec 14h side and held (steps A5 and A6).

When the path switching as described above is executed, the transmission data from the information processing device 10 passes through the controller 12a, is sent to the modem 12b, is modulated into an analog signal in the voice band, and is input to the PCM codec 12c. It

Further, the transmission data is converted into a PCM digital signal in the PCM codec 12c and input to the ADPCM codec 14h of the digital mobile phone 14 through the digital signal line 22.

The ADPCM codec 14h compresses the PCM digital signal, converts it into an ADPCM digital signal, and inputs it to the radio section 14i. The wireless unit 14i is AD
The digital signal from the PCM codec 14h is digitally modulated, and the data is transmitted from the antenna 14j to the base station 15 via the wireless transmission path. In case of reception,
Follow the opposite route.

In the voice band mode, the speaker 14d and the microphone 14e are disconnected from the radio section 14i, so that the data communication is not affected. In the voice band mode, line control for establishing and disconnecting a call with the base station 15 uses the data link unit 12d via the controller 12a according to a command from the information processing device 10, and uses the mobile phone control line 20. , By sending a line control command to the CPU 14c via the SIO 14b.
7 is controlled.

In the voice band mode, if the PCM codec 12c is provided with the ADPCM codec function for compression coding, the ADPCM codec 14h in the digital portable telephone 14 is not used by holding the switch circuit 14a on the side a. It is also possible to directly send the ADPCM signal to the wireless unit 14i.

Next, details of the digital mode will be described with reference to the flowchart shown in FIG. The information processing device 10 sets the controller 12a in the interface device 12 to the digital mode by a predetermined command or the like (step B1). Controller 12a
Switch circuit 12 when set to digital mode.
f is held on the b side (the data link section 12d side) (step B2).

Further, the controller 12a uses the data link unit 12d to control the mobile phone control line 20 and SI.
Switch circuit 1 to CPU 14c through O14b
An instruction is sent to hold 4a on the a side and switch circuit 14g on the a side (step B3). CPU 14a
Switch circuit 1 in response to a switch switching instruction.
4a is switched to the a side (radio unit 14i side) and the switch circuit 14g is switched to the a side (ADPCM codec 14h side) and held (steps B4 and B5).

The data transmitted from the information processing device 10 passes through the controller 12a and is ADP in the data link unit 12d.
Converted to CM digital signal, digital signal line 2
2 is input to the wireless unit 14i.

The radio section 14i digitally modulates the digital signal from the controller 12a, and the data is transmitted from the antenna 14j to the base station 15 via the radio transmission path. In the case of reception, the route that is the reverse of the above is followed.

In the digital mode, the speaker 14d and the microphone 14e are disconnected from the radio section 14i, so that the data communication is not affected. Next, details of the analog mode will be described with reference to the flowchart shown in FIG.

The information processing device 10 sets the controller 12a in the interface device 12 to the analog mode by a predetermined command or the like (step C1). When the controller 12a is set to the analog mode,
The switch circuit 12e is held on the side a (the side of the network control device 16) (step C2).

Further, the controller 12a connects the information processing apparatus 10 and the modem 12b to each other, and the data link unit 12
Separate d. As a result, in the analog mode, the transmission data from the information processing device 10 is modulated by the modem 12b and sent to the communication partner via the general exchange telephone network by the NCU 16a and the modular jack 16b in the network control device 16. In the case of reception, the route that is the reverse of the above is followed.

In this analog mode, the information processing device 10 is connected to the general switched telephone network by the combination of the interface device 12 and the network control device 16. In this way, the interface device 12 and the digital mobile phone 14 temporarily modulate the digital signal from the information processing device 10 into an analog signal in the voice band, and then convert it into a digital signal by the codec, and the digital signal line 22 is connected. Method of sending to digital mobile phone 14 via voice (voice band mode)
And a method (digital mode) of communicating from the information processing device 10 to the digital mobile phone 14 via the interface device 12 as a digital signal, and a digital signal from the information processing device 10 is modulated into a voice band signal by the modem 12b. Then, the user can select a wired system (analog mode) using a conventional modem that connects to the network control device 16 and connects to the general switched telephone network.

Since the interface device 12 can be connected to the digital mobile phone 14 or the network control device 16 with one connector 30, the user can perform communication using the digital mobile phone 14 or can use a wired general-purpose device. It is possible to select whether to perform communication using the switched telephone network.

Furthermore, by incorporating the interface device in the information processing device 10, the device configuration of the mobile data communication system can be simplified. In addition,
Although the above embodiments have been described as being applied to PHS, they can also be applied to a system using mobile communication such as a digital mobile phone.

[0067]

As described above in detail, according to the present invention, by providing the interface device and the digital mobile phone which operate in the voice band mode, the digital mode, and the analog mode in accordance with the command from the information processing device,
Without specifying analog or digital
It becomes possible to perform data communication by connecting the information processing device and the digital mobile phone.

[Brief description of drawings]

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

FIG. 2 is a diagram for explaining a connector for connecting an interface device 12 and a digital mobile phone 14 or a network control device 16 in this embodiment.

FIG. 3 is a diagram showing a form in which an interface device 12 is built in the information processing device 10 in this embodiment.

FIG. 4 is a flowchart for explaining an operation in a voice band mode in this embodiment.

FIG. 5 is a flowchart for explaining the operation of the digital mode in this embodiment.

FIG. 6 is a flowchart for explaining an operation in an analog mode in this embodiment.

[Explanation of symbols]

10 ... Information processing device, 12 ... Interface device, 14
… Digital mobile phones (mobile stations), 15… Base stations, 16…
Network controller, 12a ... Controller, 12b ... Modem,
12c, 14f ... PCM codec, 12d ... Data link part, 12e, 12f, 14a, 14g ... Switch circuit, 14b ... SIO (serial data control logic circuit), 14c ... CPU, 14d ... Speaker, 14e ... Microphone, 14h ... ADPCM codec, 14i ... Radio unit, 14j ... Antenna.

Claims (7)

[Claims] 1. A modulation / demodulation of data input / output to / from the information processing device, the device being connected to an information processing device that performs data communication via a wireless transmission path between a base station and a mobile station. And a conversion unit for performing analog / digital conversion on the data modulated / demodulated by the modem, and an interface for inputting / outputting data analog / digital converted by the conversion unit with the mobile station. And a control unit that controls the operation of the mobile station based on an instruction from the information processing device, and inputs and outputs data to and from the mobile station by a digital signal. apparatus. 2. The interface device according to claim 1, wherein the conversion means further has a function of compressing and coding data. 3. A modulation / demodulation of data input / output to / from the information processing device, the data processing device being connected to an information processing device that performs data communication via a wireless transmission path between a base station and a mobile station. And a conversion unit for performing analog / digital conversion on the data modulated / demodulated by the modem, and an interface for inputting / outputting data analog / digital converted by the conversion unit with the mobile station. And a data link unit that establishes a link with the other party of communication via the mobile station and sends and receives data with a digital signal, to either the data link unit or the conversion unit,
Selection means for selecting a connection with the interface; and control means for controlling the operation of the mobile station and the selection means based on an instruction from the information processing device. An interface device for selecting whether to perform transmission / reception via the modem, the conversion means, and the mobile station, or via the data link means and the mobile station. 4. A modulation / demodulation of data input / output to / from the information processing device, the device being connected to an information processing device for performing data communication via a wireless transmission path between a base station and a mobile station. A conversion unit for performing analog / digital conversion on the data modulated and demodulated by the modem; and a first selection unit for selecting connection with the modem to either the conversion unit or an external output. , An interface for inputting / outputting data analog / digital converted by the converting means to / from the mobile station, and a link between the communication partner side and the communication partner side are established via the mobile station, and data is converted into digital data. A data linking means for exchanging data, and either the data linking means or the converting means,
Second selection means for selecting connection with the interface, and control means for controlling the operation of the mobile station, the first selection means, and the second selection means based on an instruction from the information processing device. And exchanging data with the information processing device via the modem, the conversion means, and the mobile station, the data link means, the mobile station, or the modem. An interface device characterized in that it is selected whether to perform it via the interface device. 5. The interface device has a connector for connecting to the modem, the conversion means and the data link means, and the modem is connected by connecting a connector for external connection. The interface device according to claim 4, wherein the conversion means and the data link means are connected by connecting a connector for a station. 6. An interface for performing data communication with the base station via a wireless transmission path, the interface being capable of inputting and outputting control signals and digital signals to and from an external device, and between the interface. A radio unit for transmitting and receiving digital signals to and from the base station via a radio transmission path; a voice conversion unit including a microphone for converting voice into an analog signal and a speaker for converting the analog signal into voice; A conversion unit that performs analog / digital conversion on a signal exchanged with the voice conversion unit, disconnection and connection are switched between the interface and the conversion unit or the wireless unit to convert a digital signal. Switch means for changing the route, and based on a control signal from an external device input via the interface, the switch hand A mobile phone device, comprising: a control unit for switching between stages, wherein the microphone and the speaker are disconnected from the wireless unit when digital signal data is exchanged with the external device. 7. The mobile phone device further comprises a compression encoding unit that is connected to the wireless unit, and compresses and encodes a digital signal input / output via the interface. 7. The mobile phone device according to claim 6, wherein a compression-encoded digital signal is transmitted and received to and from the base station via the wireless unit.