JPH08102801A - Portable communication equipment and data terminal connected to the equipment - Google Patents

Abstract

PURPOSE: To make a response and to appropriately switch data communication and a call when a data terminal is connected to a portable communication equipment and data communication is realized. CONSTITUTION: When a CNG silence detection circuit 42 detects a CNG signal or a silent state when an incoming call arrives from a radio line in a portable telephone set 1, a control part 11 outputs a start signal by an incoming signal generation circuit 10. When the incoming signal detection circuit 13 of a facsimile terminal 2 detects the start signal, a first response signal is outputted to the portable telephone set 1 and facsimile reception is realized. When facsimile reception is terminated, a control part 17 outputs a second response signal showing termination by a portable telephone set 1. The control part 11 of the portable telephone set 1 opens the radio line when it detects the second response signal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile communication device having a call function, and a data terminal connected to the mobile communication device and performing data communication via the mobile communication device.

[0002]

2. Description of the Related Art In recent years, wireless telephone systems such as automobile telephones, mobile telephones, etc. have been rapidly expanding, and in conjunction with this, fax and personal computer communications have come to be performed.
Currently used mobile phones and the like are equipped with an earphone / microphone terminal in consideration of cases where normal speakers and microphones cannot be used due to conditions such as use environment.

A data terminal was connected to the earphone microphone terminal for data communication.

FIG. 12 is a schematic view showing a connection structure of an earphone microphone part of a conventional handyphone. The earphone microphone plug 50 is a three-pin terminal for receiving a voice for the earphone 52, transmitting a voice for the microphone 53, and GND, and is configured to be attached to the earphone microphone terminal 51 of the handyphone 54. The earphone microphone terminal 51 has an amplifier 55,
The receiving circuit via the capacitor 56 and the resistor 57
A transmitting circuit is configured via the capacitor 58, the resistor 59, and the amplifier 60.

FIG. 13 is a circuit diagram showing the structure of a conventional handy phone.

The control circuit 6 is based on an operation signal from the operation section 72.
Reference numeral 9 controls the demodulation circuit 67 and the modulation circuit 74. The radio wave received via the antenna 65 is amplified by the receiving circuit 66 and then demodulated into a voice signal by the demodulating circuit 67. The audio signal is amplified by the amplifier 68 and output from the speaker 62. On the other hand, the audio signal input to the microphone 63 is sent to the amplifier 7
After being amplified by 3, the transmission circuit 7 is modulated by the modulation circuit 74.
5 is transmitted. When the earphone microphone plug 78 is inserted into the earphone microphone terminal 61, the contacts 76 and 77 with the earphone microphone plug 78 are connected to the earphone microphone plug 7.
It is pushed up by the thickness of 8 and the speaker 6 as shown in FIG.
The input side of 2 and the output side of the microphone 63 are cut off. Then, the terminals on the transmitting side and the receiving side of the earphone microphone plug 78 are connected to the amplifiers 68 and 73, and the telephone call by the earphone microphone becomes possible.

[0007]

However, in the above-mentioned conventional example, there is an increasing demand for communication by connecting a terminal device such as a fax to the earphone / microphone terminal, but since the purpose of the call is mainly used as a mobile phone, A mobile phone and a facsimile are connected using the earphone / microphone terminal of the mobile phone, and if the system has an automatic reception function, it becomes a facsimile even if a call comes in. Further, when the mobile phone and the facsimile are connected using the earphone / microphone terminal of the mobile phone, the connected cable has to be removed when the user wants to talk on the mobile phone because of the above-described configuration.

[0008] Further, in Japanese Patent Laid-Open No. 6-85961 (publication date '94 .325), a mobile phone and a facsimile terminal are connected using a dedicated insertion port for connecting a facsimile terminal of the mobile phone. Was there.

However, the method disclosed in Japanese Patent Laid-Open No. 6-85961 has a dedicated insertion port for a facsimile terminal, and does not connect the facsimile terminal using the earphone jack as described above.

[0010]

In order to solve the above problems, the present invention relates to a first communication means for detecting an incoming call in a portable communication device to which an external data terminal can be connected: a data communication at the time of an incoming call. And a second detecting means for detecting whether the external data terminal is activated according to the detection by the second detecting means. I will provide a.

The present invention is also incorporated in a portable communication device to which a data terminal can be connected, when a call path for a call and a switching means for switching the communication path by the data terminal and an external terminal are connected. A connection means for disconnecting a signal path to the microphone and the speaker and sending a signal to the signal path to the external terminal, and the data terminal,
Provided is a portable communication device which is connected using the connecting means and communicates via the connecting means.

Further, according to the present invention, a portable communication device having a connecting means for disconnecting a signal path to a built-in microphone and a speaker when an external terminal is connected and sending a signal to the signal path to the external terminal. In a data terminal connected using the connecting means, a first detecting means for detecting an activation signal from the portable communication device and a second detecting means for detecting whether or not the data communication is performed when an incoming call is received. There is provided a data terminal comprising: a means and a sending means for sending a signal for causing the portable communication device to switch to a call if the second detecting means does not detect data communication.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in more detail with reference to the drawings.

FIG. 1 is a diagram showing a system configuration adopting a FAX / TEL switching system for automatically switching between a facsimile communication and a mobile telephone call according to the present invention, showing a state in which a mobile telephone and a fax terminal are connected. .

The earphone microphone plug of the fax terminal 2 is connected to the earphone microphone terminal 3 of the mobile phone 1. In this state, the mobile phone 1 and the fax terminal 2 are turned on to wake up, and when an incoming call is received, the mobile phone 1 captures the line and FAX / TEL switching enables the FAX terminal to automatically receive the fax. In the case of TEL, the bell (ringer section 43) of the mobile phone 1 is activated and the operator is informed.

Reference numeral 4 denotes an operation section, which has key switches for various operations. Reference numeral 5 denotes a display unit, which displays details of operations performed by the operation unit 4. 6 is a speaker and 7 is a microphone.

In addition, the mobile phone 1 automatically switches between telephone communication and facsimile data communication in response to an incoming call.
AX / TEL switching mode, automatic reception mode (FAX priority) that gives priority to facsimile reception, and three modes of manual reception mode (TEL priority) that gives priority to communication, or an operation key capable of switching operation by this combination 8 is provided so that the operation in the designated mode can be performed.

In the switching of the above three modes, the mobile phone 1 judges whether the earphone microphone plug of the fax terminal 2 is connected to the earphone microphone terminal 3, and if not connected, FAX / TEL switching or You may not be able to set the mode to the automatic reception mode,
If the earphone / microphone plug is not connected, FA
When the mode is set to the X / TEL switching mode or the automatic receiving mode, the speaker or the display unit of the mobile phone 1 may warn the operator.

FIG. 2 is a block diagram showing the configuration of the system according to this embodiment. A mobile phone 1 is shown in the upper part of FIG.
The configuration of the fax terminal 2 is shown in the lower part of FIG.

The earphone-side terminal 3a of the earphone microphone terminal 3 has a capacitor 6, a speaker, and an earphone switching circuit 40.
Is connected to the speaker amplifier 4 via. The speaker 5 is connected to the speaker amplifier 4 through the speaker 5 and the earphone switching circuit 40. The microphone-side terminal 3b of the earphone microphone terminal 3 is connected to the microphone amplifier 9 via the condenser 7, the earphone microphone, and the microphone switching circuit 41. The microphone 8 is connected to the microphone amplifier 9 through the earphone microphone / microphone switching circuit 41 through 8a.

The control circuit 11 controls the mobile phone 1 on the basis of the contents stored in the memory 12 as a whole, and makes a call to the line, sends the other party's phone number, makes a call, disconnects, holds the call, controls the FAX. / TEL is switched. The control circuit 11 also determines whether or not the earphone microphone plug 29 is connected to the earphone microphone terminal 3. In this determination, as shown in FIG. 3, when the potential of C in FIG. 2 changes from H (high level) to L (low level), the change is detected and it is determined that the earphone microphone plug is connected.

The CNG silence detecting section 42 captures a wireless line, and then the C signal which is a facsimile signal in the detecting section.
It is detected whether it is an NG signal, no sound, or an audio signal. Here, if the CNG signal or no sound, the operation of notifying the control unit 11 is performed.

Next, the incoming signal generation circuit 10 outputs an incoming signal under the control of the control circuit 11, and the output is connected to the earphone side of the earphone microphone terminal 3. The earphone side of the earphone microphone terminal 3 is connected to the control circuit 11 to detect a response. If it is a voice signal, the control unit 11 activates the ringer unit 43 to notify the operator.

When the control circuit 11 receives an incoming call from a wireless line, the control circuit 11 informs the control unit 11 that the CNG silence detector detects and detects CNG or silence.
On-off-on control is performed from the incoming signal generation circuit 10 from 1. When the earphone side of the earphone microphone terminal changes from H (high level) to L (low level), the change is detected and reception activation control is performed.

The memory 12 is composed of a ROM in which the control contents of each control of the control circuit 11 described above are stored and a RAM for a work area for calculation.

The operation unit 14 is provided with various operation keys for operating the mobile phone 1, and the operation keys for mode switching described above are also provided in the operation unit 13.

Next, the configuration of the fax terminal will be described.

The fax terminal 2 is provided with an operation unit 18 on the panel, which is an operation unit for operating for transmission and reception. Information regarding the depression of each button of the operation unit 18 is input to the control unit 17. The control unit 17 controls the fax terminal 2 in a centralized manner. At the time of data transmission, the drive unit 21 is operated to read a document or the like (not shown) by the reading unit 20 and send the read data to the modulation circuit 22. In addition, when receiving data, the information received is printed by the printing unit 19
Hard copy by. When the output of the incoming signal detection circuit 13 is FAX reception, the switch 26 is closed for a certain period of time.
The fax terminal 2 includes a telephone line terminal 27 for connecting to a telephone line, and an earphone microphone plug 29 for connecting to the mobile phone 1. The earphone side of the earphone / microphone plug 29, that is, the receiving side, has the condenser 14,
It is connected to the demodulation circuit 16 via the amplifier 15. The reception data demodulated by the demodulation circuit 16 is input to the control unit 17. The incoming signal detection circuit 13 is connected to the earphone side of the earphone microphone plug 29 and detects a FAX activation signal. When the FAX start signal is detected, a reception operation is performed, and the switch is operated to notify the mobile phone 1 of the operation state, the end, and the like.

On the other hand, the data at the time of transmission is modulated by the modulation circuit 22 and amplified by the amplifier 23 to an appropriate level. The modulated signal of the amplifier 23 is output to the microphone side of the earphone microphone plug 29 via the capacitor 24.

The telephone line terminal 27 is connected to the input side of the amplifier 15 and the amplifier 2 via the relay contact 25 and the transformer 28.
3 is connected to the output side. The fax terminal 2 is connected to the telephone line terminal 37 when performing normal fax communication instead of fax communication by the mobile phone 1.

The control by the control unit 17 is performed by the contents of the ROM in the control unit 17, and the processing such as calculation is performed by the RAM.

Next, the operation when there is an incoming call from the wireless line will be described.

When there is an incoming call from the wireless line, the control circuit 11 captures the wireless line, and the CNG silence detecting section 42 detects whether it is CNG, silence, or a voice signal. If it is a voice signal, the control unit 11 activates the ringer unit 43 to call the operator. When the operator goes off-hook, the switching circuits 40 and 41 are switched to the speaker side and the microphone side to make a call. If the sound is CNG or silent, the control unit 11 activates the incoming signal generation circuit 10 and switches the switching circuits 40 and 41 to the earphone microphone terminal side. Next, the earphone microphone terminal 3 activates the fax terminal 2. When the fax terminal 2 detects an incoming signal in the incoming call detection circuit 13, the fax terminal 2 performs a receiving operation and at the same time closes the switch 26 at a constant interval to notify the mobile phone 1 of the incoming signal, and the potential of A is HL.
The response detection signal notifies the control unit 11 that the reception operation has started.

When the receiving operation is completed, the switch 26
The mobile phone 1 is informed that the reception operation has ended by closing for a certain period of time. As a result, A of mobile phone 1
The potential of the part changes to HL. The control circuit 11 detects the response signal due to the potential drop of the portion A and opens the wireless line.

FIG. 4 is a flow chart showing the operation of the mobile phone 1 when receiving a call.

FIG. 5 is a flowchart showing the operation of the fax terminal 2 when an incoming call arrives.

The operation of each part of FIG. 2 when the FAX / TEL switching mode is set will be described below with reference to the flowcharts of FIGS. 4 and 5.

First, when there is an incoming call, the wireless line is captured in S401. This is performed by the control unit 11 of the mobile phone 1.

Next, in S402, the CNG silence detector 42 detects CNG or silence. When CNG or silence is detected, the switching circuits 40 and 41 are switched to the earphone microphone terminal side in S403. Then, in S404, the activation signal is output from the incoming signal generation circuit 10 to the fax terminal 2 to activate the fax terminal 2. This start signal is shown at 6-1 in FIG. When the fax terminal 2 detects the activation signal from the mobile phone 1 in the incoming signal detection circuit 13 in S501, in S502,
The control unit 17 turns on the switch 26 for a fixed time. When the switch 26 is turned on, the potential of the portion A of the mobile phone 1 changes (from the fax terminal 2 to the mobile phone 1
Response signal is sent). In S405, the first
The response signal of 1 is detected by the control unit 11 by the change of the potential. The change in the potential of the portion A at this time is shown in 6-2 of FIG. When the control unit 11 detects the first response signal from the fax terminal, the control unit 11 holds the switching circuits 40 and 41 on the earphone microphone side, and the fax terminal 2 receives the fax in S503. When the facsimile reception is completed in S504, the control unit 17 turns on the switch 26 at a constant interval in S505 (transmits a second response signal to the mobile phone 1). This second response signal is shown at 6-3 in FIG. Also, during facsimile reception,
The control unit 11 of the mobile phone 1 monitors the potential of the portion A, and when the second response signal is detected in S406, S40 is detected.
In step 7, the switching circuits 40 and 41 are switched to the speaker 5 and microphone 8 side to return to the standby state, and in step S408, the wireless line is opened.

If a device other than a facsimile device, such as an earphone microphone, is connected to the earphone microphone terminal 3, the first response signal is not detected in S405. Please display the connection request of the facsimile device.

If the CNG silence detector 42 detects no CNG or silence in S402, the ringer unit 43 is rung in S410 to wait for off-hook. Operation unit 1 in S411
When the off-hook operation is performed in 3, a call is made in S412. When the call ends and the operation unit 13 performs an on-hook operation, the wireless line is released in S408 and the operation ends.

A change in the potential of the portion A of the mobile phone 1 in the above-mentioned operation is shown in 6-4 of FIG. As shown in the figure,
Since the activation signal, the first response signal, and the second response signal are transmitted and received between the mobile phone 1 and the fax terminal 2 by changing the potential, power is not wastefully consumed, and the fax that can be carried by the mobile phone 1 is particularly useful. A device such as the terminal 2 which is operated by a battery power source can efficiently perform communication such as a start signal and a response signal.

In the above embodiment, the FAX / TEL
Although the switching mode has been described, in other modes, when the earphone microphone plug is connected, the switching circuits 40 and 41 are switched to the earphone microphone terminal 3 side and play the same role as the conventional earphone microphone terminal. .

FIG. 7 is a block diagram showing the structure of another embodiment.

This figure shows an example in which a CNG silence detector for switching between FAX and TEL is provided in the fax main body. In the upper part of FIG. 7, the configuration of the mobile phone 1 is shown in FIG.
The configuration of the fax terminal 2 is shown in the lower part. Circuit parts denoted by the same reference numerals as in FIG. 2 have the same configuration.

Also in this embodiment, three modes can be selected similarly to the above-mentioned embodiment, and the mode setting is also the same as that of the above-mentioned embodiment, and the explanation thereof will be omitted.

The control circuit 36 controls the mobile telephone 1 in a centralized manner, and controls transmission to the line, transmission of the other party's number, acquisition, call, disconnection, holding, and incoming.

Further, the control circuit 36 detects the connection state of the earphone / microphone plug by the change of the potential of C, and the FAX
When the / TEL switching mode or the automatic reception mode is set, the switching circuits 40 and 41 are switched to the earphone microphone terminal 3 side.

The incoming signal generation circuit 35 outputs an incoming signal under the control of the control circuit 36, and the output is connected to the earphone side of the earphone microphone terminal 3. The earphone side of the earphone microphone terminal 3 has a control circuit 3 for detecting a response.
6 is connected. When the control circuit 36 receives an incoming call from the wireless line, the control circuit 36 controls the incoming signal generation circuit 35 to output the incoming signal. Also, the microphone side of the earphone microphone terminal has a resistor 37
Is connected to the power source + B via the, and is further connected to the control circuit 36 for detecting the response detection signal B. When the response detection signal B changes to H-L, the control circuit 36 detects the change and controls the switching circuits 40 and 41 and the ringer unit 43.
Control the startup of.

The memory 12 is composed of a ROM in which control contents for performing each control of the above-mentioned control circuit 36 are stored and a RAM for a work area for calculation.

The operation section 13 is provided with various operation keys for operating the mobile phone 1, and operation keys for mode switching and the like are also provided in the operation section 13.

Next, the configuration of the fax terminal will be described.

The operation unit 18 and the control unit 4 of the fax terminal 2
5, drive unit 21, reading unit 20, printing unit 19, demodulation circuit 16, amplification units 15, 23, capacitors 14, 24, telephone circuit terminal 27, changeover switch 25, transformer 2
The configuration of 8 is the same as that of FIG. A switch 39 for indicating a response to an incoming call is connected to the earphone side of the earphone microphone terminal. Further, a CNG silence detector is provided later via the capacitor 14 and the amplifier 15. Further, a switch 38 which is operated by the activation of the control unit 45 upon detection of CNG or silence by the detection unit is connected to the microphone side. The control of the control unit 45 is
The contents of the ROM in the control unit are performed, and the processing such as calculation is performed in the RAM.

Here, when the FAX / TEL switching mode is set, the operation when there is an incoming call from the wireless line, the control unit 36 captures the line, and the incoming signal generation circuit 35 causes the earphone microphone terminal 3 to operate. Is detected by the incoming signal detection circuit 13 via. At this time, the switching circuits 40 and 41
Has switched to the earphone microphone terminal 3. Then C
The NG silence detector detects whether it is CNG, silence, or voice, and if it is a voice signal, the control unit 45 causes the switch 38.
Is closed at a constant interval, the response detection signal B of the mobile phone 1 becomes H-L-H and responds to the control unit 36. Thereby, the control unit 36 activates the ringer unit 43 to call the operator, and when the operator goes off-hook, the switching circuits 40 and 41 are switched to the speaker / microphone side to carry out the call. In the case of CNG or silence, switch 3 from control unit 45
By closing 8 for a certain period of time, the response detection signal B of the mobile phone 1 becomes HL and responds to the control unit 36. As a result, a signal for starting the receiving operation is given from the incoming signal generation circuit 35, and the switching circuits 40 and 41 remain on the earphone microphone terminal side. When the incoming signal detection circuit 13 detects a signal, the reception operation is started. When the receiving operation is completed, the signal is again given to the mobile phone 1 by the switch 39 to give the response detection signal A to the control unit 36, and the operation is finished.

FIG. 8 is a flow chart showing the operation of the mobile phone 1 when receiving a call.

FIG. 9 is a flowchart showing the operation of the fax terminal 2 when receiving a call.

The operation of FIG. 7 will be described below with reference to FIGS. 8 and 9.

First, when there is an incoming call from the wireless line, S80
At 1, the control unit 36 of the mobile phone 1 captures a wireless line. Then, in step S802, the control unit 36 causes the incoming signal generation circuit 35 to generate an activation signal for activating the fax terminal 2 by changing the potential of the signal line. The start signal at this time is shown in 10-1 of FIG. On the other hand, in the fax terminal 2, in S901,
The incoming signal detection circuit 13 detects the activation signal from the mobile phone 1. The incoming signal detection circuit 13 is used in the mobile phone 1.
When it is detected that the potential of the connection line between and changes in the pattern 10-1 in FIG. 10, a detection signal is output to the control unit 45. When the activation signal is detected, in step S902, the control unit 45 sends the first response signal to the mobile phone 1 by turning on the switch 39 for a certain period of time as shown in 10-2 of FIG. At this time, the control unit 3 of the mobile phone
After outputting the activation signal to the fax terminal 2, 6 detects the first response signal from the fax terminal 2 by detecting the change in the potential of the connection line with the fax terminal 2, and in S803, When the response signal 1 is detected, the switching circuits 40 and 41 are held on the earphone microphone terminal side.

Next, the control unit 45 of the fax terminal 2
In S903, it is determined whether the CNG silence detection unit 42 has detected a CNG signal or a silence state for a predetermined time within a predetermined time after the activation signal is detected. If the CNG signal or the silence state is detected, S904 is performed. In, the second response signal is output to the mobile phone 1 by turning on the switch 38 for a certain period of time as shown in 10-3 of FIG. In step S804, the mobile phone 1 detects the same as the above-described first response signal, and the control unit 36 sets the second response signal.
When the response signal is detected, the switching circuits 40 and 41 are held on the earphone microphone terminal side. Fax terminal 2
In S905, facsimile reception is performed, and S90 is received.
When the facsimile reception is completed in 6, the control unit 45
In S907, the switch 38 is turned on / off in the pattern 10-4 in FIG. 10 to output the third response signal to the mobile phone 1. Control unit 3 of mobile phone 1
In S805, when the third response signal is detected by detecting the change in the potential of the connecting line in S805, the wireless line is opened.

If the fax terminal 2 does not detect the CNG signal or the silent state in S903, the control unit 45 sets the switch 38 to 10- of FIG. 10 in S908.
The fourth response signal is output to the mobile phone 1 by turning on and off in the pattern shown in FIG. In S807, when the control unit 36 of the mobile phone 1 detects the fourth response signal by detecting the change in the potential of the connection line,
In S808, the switching circuits 40 and 41 are switched to the speaker and microphone sides, and in S809, the ringer unit 43 is activated to call the operator.

When the off-hook is made by the operation of the operation unit 13 in S810, the call is made in S811, and when the call is ended and the on-hook operation is performed in the operation unit 13, the switching circuits 40 and 41 are executed in S813. Is switched to the earphone microphone terminal 13 side, and the wireless line is opened in S806 to end the communication.

If a device other than a facsimile device, such as an earphone microphone, is connected to the earphone microphone terminal 3, the first response signal in S803 is not detected. Display the connection request of the facsimile such as.

FIG. 11 is a diagram showing changes in the potential of the connection line between the mobile phone 1 and the fax terminal 2 at the time of an incoming call during the above-described operation. In the figure, 11-1 shows a change in potential from when the mobile phone 1 detects an incoming call from the wireless line until the fax terminal 2 responds to the activation signal from the mobile phone 1, and 11-2 shows CNG. Or it shows the change of the electric potential when the silent state is detected and the facsimile is received.
3 shows a change in potential when a call is made by the mobile phone 1.

The example of the fax terminal as the data terminal device connected to the mobile phone (portable communication device) has been described above, but the same can be applied to the personal computer terminal. Also, although an example in which the incoming signal generated by the incoming signal generation circuit is turned on for a certain period of time has been described, it may be a signal that is turned on at certain intervals. Further, various signal patterns can be formed by combining them.

[0065]

As described above, according to the present invention,
When an external data terminal is connected to the mobile communication device, the mobile communication device can appropriately switch between call and data communication.

When the external terminal is connected, the signal path to the built-in microphone and speaker is cut off, and when the data terminal is connected to the connection port for sending the signal to the signal path to the external terminal, It is possible to provide a mobile communication device that can appropriately activate a data terminal.

[Brief description of drawings]

FIG. 1 is a diagram showing a system configuration adopting a FAX / TEL switching method according to the present invention.

FIG. 2 is a circuit block diagram showing an embodiment of a FAX / TEL switching system of the system according to the present embodiment.

FIG. 3 is a diagram showing changes in the potential of the earphone microphone terminal for determining that the earphone microphone plug is connected to the earphone microphone terminal according to the present embodiment.

FIG. 4 is a flowchart showing an operation of the mobile phone of the embodiment.

FIG. 5 is a flowchart showing the operation of the fax terminal of the embodiment.

FIG. 6 is a diagram showing signals communicated between the mobile phone 1 and the fax terminal 2 in this embodiment.

FIG. 7 is a circuit block diagram showing another embodiment of the FAX / TEL switching system of the system according to another embodiment.

FIG. 8 is a flowchart showing an operation of the mobile phone of another embodiment.

FIG. 9 is a flowchart showing the operation of the fax terminal of another embodiment.

FIG. 10 is a diagram showing signals communicated between a mobile phone 1 and a fax terminal 2 in another embodiment.

FIG. 11 is a diagram showing signals communicated between the mobile phone 1 and the fax terminal 2 in another embodiment.

FIG. 12 is a schematic diagram for explaining a configuration of an earphone microphone connection unit of a conventional handyphone.

FIG. 13 is a circuit diagram showing an example of a circuit of a conventional mobile communication device.

FIG. 14 is a diagram showing a state where an earphone microphone plug of a conventional mobile communication device is inserted.

[Explanation of symbols]

 1 Mobile Phone 2 Fax Terminal 3 Earphone Microphone Terminal 5 Speaker 8 Microphone 10 Incoming Signal Generation Circuit 11 Control Unit (Mobile Phone) 12 Memory Circuit 13 Incoming Signal Detection Circuit 14 Operation Unit 16 Demodulation Circuit 17 Control Unit (Fax Terminal) 22 Modulation Circuit 29 Earphone microphone plug 40 Switching circuit 41 Switching circuit 42 CNG silence detection circuit 43 Ringer

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display area // H04N 1/32 Z

Claims (22)

[Claims] 1. In a portable communication device to which an external data terminal can be connected, first detecting means for detecting an incoming call: second detecting means for detecting whether or not data communication is performed when an incoming call is received: Second
A portable communication device comprising: output means for outputting a start signal for starting the external data terminal according to detection by the detection means. 2. The portable communication device according to claim 1, wherein the second detecting unit detects a signal indicating that the data communication is performed. 3. The portable communication device according to claim 1, wherein the second detecting unit detects a silent state for a predetermined time. 4. The portable communication device according to claim 1, wherein the output unit outputs the activation signal by changing a potential of a connection line to the external data terminal. 5. The method according to claim 1, wherein a response signal to the activation signal from the external data terminal or a signal indicating the end of data communication is detected.
And a means for holding or opening the communication line according to the detection by the third detecting means. 6. The portable communication device according to claim 5, wherein the third detecting means detects the signal by detecting a change in potential of a connection line to the external data terminal. 7. The portable communication device according to claim 1, when the external terminal is connected, the signal path to the built-in microphone and speaker is disconnected, and the signal to the signal path is sent to the external terminal. A portable communication device comprising a connecting means, wherein the data terminal is connected using the connecting means. 8. The mobile communication device according to claim 7, wherein the connection unit has a determination unit that determines that the data terminal is connected. 9. A portable communication device to which a data terminal can be connected, a call path for a call, a switching means for switching the communication path by the data terminal, and a built-in microphone and speaker when an external terminal is connected. Disconnecting the signal path of, and connecting means for sending a signal to the signal path to the external terminal, the data terminal is connected using the connecting means, and performs communication through the connecting means. A mobile communication device characterized by the above. 10. The automatic switching mode according to claim 9, which automatically switches between a call and a data communication by the external data terminal in response to an incoming call, and a communication route to the external data terminal side in response to the incoming call. A portable communication device comprising: a data communication mode for connection; and a selection means for selecting a call mode for connecting a communication path to the call means in response to an incoming call. 11. The portable communication device according to claim 10, wherein the switching unit switches the communication path according to the selection by the selecting unit. 12. A portable communication device having connection means for disconnecting a signal path to a built-in microphone and a speaker when an external terminal is connected and sending a signal to the signal path to the external terminal. In a data terminal connected using means, first detecting means for detecting an activation signal from the portable communication device, second detecting means for detecting whether or not data communication is performed when an incoming call is received, A data terminal, characterized in that it has transmission means for transmitting a signal for switching to the mobile communication device when the second detection means does not detect data communication. 13. The data terminal according to claim 12, further comprising means for transmitting a response signal to the mobile communication device in response to detection of the activation signal. 14. The data terminal according to claim 12, further comprising a sending unit that sends a signal indicating that the data communication is completed to the portable communication device, in response to the end of the data communication. . 15. The data terminal according to claim 12, wherein the sending unit sends a signal by changing a potential of a connection line with the portable communication device. 16. A communication method in which a data terminal is connected to a mobile communication device having a call function, and data communication is performed via the mobile communication device, wherein the mobile communication device performs data communication when receiving a call from a line. When it is detected that it is a data communication, it outputs a start signal for starting the data terminal to the data terminal, and the data terminal performs the data communication in response to the reception of the start signal. When the data communication is completed, an end signal indicating that the data communication is completed is output to the mobile communication device, and the mobile communication device ends the communication operation in response to the reception of the end signal. Communication method to do. 17. The communication method according to claim 16, wherein the detecting step detects a signal indicating data communication from the line. 18. The communication method according to claim 16, wherein the detecting step detects that the line is in a silent state for a predetermined time. 19. The transmission / reception of a signal between the mobile communication device and the data terminal according to claim 16,
A communication method, which is performed by changing a potential of a connection line connecting the portable communication device and the data terminal. 20. When the external terminal is connected, the signal path to the built-in microphone and speaker is cut off, and the data terminal is connected to the connection port for sending the signal to the signal path to the external terminal. In the communication method of performing data communication via a communication device, the portable communication device outputs a start signal for starting the data terminal to the data terminal in response to an incoming call from a line, and the data terminal is the In response to the reception of the activation signal, it is detected whether or not the incoming call is data communication, and if it is detected that it is data communication, the data communication operation is performed. On the other hand, if it is detected that it is not data communication, the mobile communication device is called. And outputting a switching signal for switching to a call, and the mobile communication device switches to a call in response to the reception of the switching signal. 21. The data terminal according to claim 20, wherein the data terminal outputs a response signal to the portable communication device in response to reception of the activation signal, and the data communication ends in response to the end of the data communication. Is output to the mobile communication device, and the mobile communication device holds or terminates the communication operation of the line according to the reception of the response signal or the end signal. 22. Transmission / reception of a signal between the mobile communication device and the data terminal according to claim 20,
A communication method, which is performed by changing a potential of a connection line connecting the portable communication device and the data terminal.