JP2005269519A - Onboard telephone system, its control method, control program and recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an onboard telephone system by which a user can speedily answer the phone without any complicated operation when the user can answer the phone even though the user can not answer the phone, and to provide its control method, a control program and a recording medium. <P>SOLUTION: A handsfree calling system determines whether the user in a calling state or in a difficult state for calling upon detecting an incoming call (step S5), transmits a response hold command to a portable telephone set (step S9) in the difficult state for calling (step S6: calling impossible) and subsequently transmits a response hold state command to the portable telephone set (step S16) when the user can perform calling (step S14: YES). <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an in-vehicle telephone device, a control method thereof, a control program, and a recording medium.

2. Description of the Related Art Conventionally, an in-vehicle telephone device that enables a telephone call in a car such as an automobile is known. Some of these types of in-vehicle telephone devices are configured as hands-free calling devices that are connected to a telephone terminal such as a mobile phone or a car phone, and that allow hands-free calling via the telephone terminal. This type of hands-free call device restricts the user from answering a call when the vehicle is turned to the left, for example, depending on the driving state of the vehicle at the time of an incoming call or a call. For this purpose, a device that disconnects the line has been proposed (for example, Patent Document 1).
JP 2001-144850 A

  However, the above-mentioned hands-free communication device disconnects the line even if the user is able to answer the call immediately after receiving an incoming call without being able to answer the call. A complicated operation such as tracing the history and calling again is necessary.

  The present invention has been made in view of the above-described circumstances, and can respond promptly without requiring complicated operations if the user can answer the phone even if the user cannot answer the phone. It is an object of the present invention to provide an in-vehicle telephone device, a control method thereof, a control program, and a recording medium.

  In order to solve the above-described problem, the present invention provides an information acquisition unit that acquires driving information related to a driving state of the vehicle and a control that restricts a user's call according to the driving information in an in-vehicle telephone device arranged in the vehicle. And when the incoming call is detected, the control means continuously determines whether the user is able to make a call or a situation where it is difficult to make a call based on the driving information. While the telephone line is connected in response to the incoming call, and the user is kept in a response on-hold state in which the user cannot make a call, The response hold state is canceled in order to enable the call.

  According to this configuration, while determining that it is difficult to make a call, the telephone line is connected in response to an incoming call, and the call is kept in a response hold state in which the user cannot make a call. If it is determined that the call is possible, the response hold state is canceled, so that the telephone call can be performed promptly when the user is able to talk.

  In the above configuration, when the control unit is in a call, the control unit continuously determines whether the user is able to make a call or a difficult call state based on the driving information. If the response hold state is maintained and then it is determined that a call is possible, the response hold state may be canceled.

  Further, the present invention provides an in-vehicle telephone device arranged in a vehicle, comprising: an information acquisition unit that acquires driving information related to the driving state of the vehicle; and a control unit that limits a user's call according to the driving information. The control means continuously determines whether the user is able to make a call or a situation where it is difficult to make a call based on the driving information when a call is in progress. If it is determined that it is possible to make a call, the response hold state is canceled so that the user can make a call.

  According to this configuration, when a call is in progress, it is continuously determined whether the user can talk or is difficult based on the driving information. However, since the response hold state is canceled when it is determined that the user is able to talk on the phone, and then the situation where the user can talk is determined, the response on-hold state is canceled. Then, it is possible to switch to the response hold state, and it becomes possible to resume the call promptly when the user can talk.

  In the above-described configuration, when the control unit is placed in the response hold state, it has response voice transmission means for transmitting a response voice indicating that the user is in a call restriction via the telephone line to the telephone partner side. preferable. Moreover, it is preferable to have a notification means for notifying the user that the call is being restricted when the control means places the response on hold. Further, the control means may disconnect the telephone line when the response hold state continues for a predetermined set time, and informs the user of the fact when the telephone line is disconnected. You may make it provide the cutting | disconnection alerting | reporting means to perform. Further, the in-vehicle telephone device may be configured as a hands-free call device that is connected to a telephone terminal and controls a hands-free call via the telephone terminal.

  Further, according to the present invention, in the control method of the in-vehicle telephone device arranged in the vehicle, when an incoming call is detected, a situation in which the user can talk or is difficult based on driving information related to the driving state of the vehicle. Continue to make a determination, and while it is determined that it is difficult to make a call, in response to the incoming call, the telephone line is connected and the call is kept in a response hold state in which the user cannot make a call. Then, if it is determined that the call is possible, the response hold state is canceled so that the user can make a call.

  Further, according to the present invention, in the control method of the in-vehicle telephone device arranged in the vehicle, when a call is in progress, whether the user can talk or not is based on the driving information related to the driving state of the vehicle. When it is determined that it is difficult to call, it is in a state where the telephone line is connected and the user's call cannot be held in a response hold state, and then it is determined that the call is possible. The response hold state is canceled so that the user can make a call.

  In addition to being applied to the above-described in-vehicle telephone device and its control method, the present invention distributes a control program for carrying out the present invention to general users via an electric communication line, or such a program, The present invention can also be implemented in such a manner that it is stored in a computer-readable recording medium such as a magnetic recording medium, an optical recording medium, or a semiconductor recording medium and distributed to general users.

  The present invention can maintain a state in which a telephone line is connected even in a situation where the user has difficulty in calling, and can quickly make a telephone call when the user is able to talk.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a block diagram showing a hands-free call device 10 to which an in-vehicle phone device according to the present invention is applied together with its peripheral configuration.

  This hands-free call device 10 is a device that is arranged in a vehicle such as an automobile, to which a mobile phone 100 is connected, and that enables hands-free calls via this mobile phone 100. The mobile phone 100 is used for call communication with other mobile phones and fixed telephones via a mobile communication network (not shown), and includes a communication unit including a speaker, a microphone, an antenna for call communication, and the like. For example, a card-type mobile phone module that includes a general mobile phone provided or a communication unit including an antenna for call communication.

  In addition, a navigation device 110 installed in the vehicle is connected to the handsfree call device 10. The navigation device 110 performs position measurement using a GPS (Global Positioning System) or a sensor or gyroscope embedded in various parts of a vehicle, displays the current position on a map screen displayed on a display device (not shown), In addition to the function of a general navigation device having a function of guiding a route to the ground, a driving information output function for outputting driving information related to the surrounding environment of the vehicle is provided. Specifically, this driving information output function is based on the current position and the map information, and is “passing a crossing (may include before crossing)” or “passing a narrow road (may include before passing). ) ”,“ Passing through toll booth (may include pre-passage) ”, etc.,“ whether it is better to restrict the call from the surrounding environment ”, and in such a driving situation, the user has difficulty in calling For example, it is a function that outputs a limit signal S1.

  In addition, the hands-free communication device 10 includes a parking detection signal S2 indicating whether or not the parking brake of the vehicle is operated and the brake is applied, and a state in which the vehicle is moving backward (or connected to a back gear to be able to move backward). ) And a right / left turn detection signal (for example, a signal indicating whether the blinker is operating) S4 indicating whether the vehicle is turning right / left. These signals S2 to S4 may be input from an electrical equipment box or the like previously disposed in the vehicle, or a signal output unit that outputs these signals S2 to S4 may be separately disposed.

  As shown in FIG. 1, in this hands-free call device 10, a control unit (control means) 20 includes a CPU and functions as a computer that controls the entire hands-free call device 10. In addition, the control unit 20 is connected to the mobile phone 100 via the control uplink 21A and the control downlink 21B, and receives control data (for example, outgoing and incoming commands) to the mobile phone 100 via the control uplink 21A. And control data (for example, a call or end call command) is received from the mobile phone 100 via the control down line 21B. Thus, the control unit 20 can transmit and receive control data to and from the mobile phone 100, and can detect incoming calls of the mobile phone 100 and perform various controls on the mobile phone 100. Further, the storage unit (storage device) 21 stores a control program executed by the control unit 20 and data.

  The vehicle information input interface (vehicle information input I / F) 22 functions as information acquisition means for inputting information (driving information) regarding the operation status of the vehicle, and includes a plurality of input ports. The control signal S <b> 1, the parking signal S <b> 2, the reverse detection signal S <b> 3, and the right / left turn detection signal S <b> 4 are input and output to the control unit 20.

  The audio processing unit 23 is connected to the mobile phone 100 via an audio up line 21C and an audio down line 21D, and is provided in a microphone (audio input means) 30 for inputting the audio of a user (driver or the like) or a vehicle. Connected to the speaker 40. Under the control of the control unit 20, the voice processing unit 23 transmits the voice (uttered voice) input via the microphone 30 to the mobile phone 100 via the voice up line 21C, and also transmits the voice down line 21D. A voice (received voice) from the mobile phone 100 is emitted from the speaker via the mobile phone 100, thereby enabling a hands-free call.

  During the hands-free call, the audio processing unit 23 performs echo cancellation processing on the audio signal from the microphone 30, thereby canceling echo generated when the sound emitted from the speaker 40 is spread by the microphone 30. .

  Further, the voice processing unit 23 responds to the response voice (a voice indicating that the call is being restricted, for example, “pause the conversation for safety”, “resume the call” under the control of the control unit 20. ) And is transmitted to the mobile phone 100 via the voice uplink 21C. As a result, the response voice can be emitted to the telephone counterpart connected to the mobile phone 100 via the telephone line. In other words, the voice processing unit 23 also functions as a response voice transmission unit that transmits a response voice to the other party via the telephone line. Further, the voice processing unit 23 outputs the voice of the response voice to the speaker 40 under the control of the control unit 20, thereby functioning also as a notification means for notifying the user that the call is being restricted. It has become.

  The operation unit 24 includes a numeric keypad for inputting a telephone number and various operators for inputting an incoming call instruction, a response hold instruction, a response hold release instruction, and the like. The display unit 25 displays various information such as the operation state of the handsfree call device 10 (incoming call, outgoing call, response hold, automatic response hold), for example, a liquid crystal display panel or a liquid crystal drive circuit. And LEDs (Light Emitting Diodes). In the present embodiment, as will be described in detail later, the user's call (hands-free call) is restricted during the automatic response hold, and the display unit 25 displays “automatic answer hold” or “ By displaying a message (alert) such as “call suspended”, it functions as a notification means for notifying the user that the call is being restricted.

Next, the operation of the hands-free call device 10 will be described.
FIG. 2 is a flowchart showing the operation when a call is received.
First, when the incoming call is detected, the control unit 20 displays on the display unit 25 that the incoming call is being received (step S1), starts a timer to measure the incoming call time (step S2), and sets a predetermined incoming call response. It is determined whether time has passed (step S3). Here, when the incoming response time has elapsed (step S3: YES) or when an incoming call instruction is input via the operation unit 24 (step S4: incoming call), the control unit 20 can make a call. A call availability determination process for determining whether the situation is present or difficult is performed (step S5).

  The call availability determination process is a process of determining whether the user is in a situation where a call is possible or a situation where a call is difficult based on driving information (the signals S1 to S4) related to the driving state of the vehicle. Specifically, as shown in FIG. 3, the control unit 20 enters a state in which the vehicle has applied the parking brake (parking) based on the parking detection signal S <b> 2 input via the vehicle information input I / F 22. It is determined whether or not there is (step S51), and if the parking brake is applied, it is determined that the user is able to talk (step S55).

  On the other hand, if the parking brake is not applied, the controller 20 determines whether or not the vehicle is moving backward based on the reverse detection signal S3 (step S52). Based on S4, it is determined whether the vehicle is turning right or left (step S53). If the vehicle is not turning right or left, it is determined whether the limit signal S1 is input from the navigation device 110 (step S54). If it has not been input, it is determined that the user is in a state where communication is possible (step S55). That is, if the parking brake is applied, the user is in a state of not driving the vehicle, so it can be estimated that the user can make a hands-free call. No ”,“ If the restriction signal S1 is not being input (the operation situation is better if the hands-free call is restricted), the user's driving load is small, and it can be estimated that a hands-free call is possible. The unit 20 determines that the telephone call is available.

  On the other hand, the control unit 20 can estimate that the user's driving load is large when one of “backward traveling”, “turning left / right”, or “inputting the restriction signal S1” is satisfied, and therefore it is difficult to make a call. (Step S25). The above is the content of the call availability determination process.

  Returning to FIG. 2, if it is determined that the user is in a call-capable situation (step S6: call is allowed), the control unit 20 sends an incoming call command via the control uplink 21A to indicate an incoming call to the incoming call. The data is sent to the mobile phone 100 (step S7). In this case, the mobile phone 100 is switched to a call state, and the control unit 20 transmits the voice (uttered voice) input via the microphone 30 to the mobile phone 100 via the voice uplink line 21C and from the mobile phone 100. The voice (received voice) is emitted from the speaker via the voice down line 21D to enable a hands-free call, and the process proceeds to a mid-call process to be described later (step S8).

  On the other hand, if it is determined that the user is in a difficult situation (step S6: call is impossible), the control unit 20 sends a response hold command via the control uplink 21A so as to activate the response hold function of the mobile phone 100. To the mobile phone 100 (step S9). As a result, the mobile phone 100 switches to the response hold state, transmits a preset response message to the other party, and notifies the other party that the call is on hold. That is, the control unit 20 restricts telephone calls by the user while maintaining the telephone line connected.

  In addition, the control unit 20 displays a message and an icon to that effect on the display unit 25 so as to notify the user that the call is being restricted by shifting to the response hold state, and processing the response voice to that effect. Sound is emitted from the speaker 40 by the unit 23 (step S10).

  Subsequently, the control unit 20 starts a timer to measure the response hold time (step S11), and then determines whether a response hold release instruction is input via the operation unit 24 (step S12). If the response hold cancellation instruction has not been input (step S12: NO), a call availability determination process similar to step S5 is executed (step S13), and it is determined again whether or not the user is in a call-enabled state. . And if it is in the situation where a telephone call is difficult (step S14: Call is impossible), the control part 20 will determine whether the response hold time passed (step S15).

  If the response hold time has not elapsed (step S15: NO), the control unit 20 proceeds to the process of step S12 and inputs a response hold release instruction or until the response hold time elapses. Alternatively, the processes in steps S12 to S15 are repeated until it is determined that the user is in a state where the user can talk. Thereby, it is continuously determined whether or not the user is in a state where the user can make a call, and when it is determined that the user is in a state where the user can make a call (step S14: call is possible), the control unit 20 Is released to the mobile phone 100 via the control uplink 21A (step S16).

  As a result, the mobile phone 100 is released from the response hold state and switched to a state in which a call can be made, and the control unit 20 receives the voice (uttered voice) input via the microphone 30 via the voice uplink 21C. And a voice (received voice) from the mobile phone 100 is emitted from the speaker via the voice down line 21D, thereby enabling a hands-free call.

  That is, when the control unit 20 determines that the user can talk based on the driving state of the vehicle, the control unit 20 promptly switches the mobile phone 100 to the talking state and enables a hands-free call. In this case, the control unit 20 displays a message or icon to that effect on the display unit 25 to notify the user that the call restriction has been released, and the voice processing unit 23 displays a response voice to that effect. In order to notify the other party that the call restriction has been released, the voice processing unit 23 transmits a response voice to that effect to the other party via the telephone line. This makes it possible to start a telephone call smoothly and quickly.

  On the other hand, when the response hold cancellation instruction is input (step S12: YES), the control unit 20 proceeds to the process of step S16. Thus, the user can manually cancel the response hold state and start a telephone call.

  When the response hold time elapses, the control unit 20 determines that it is difficult for the user to make a call for a long time and it is unlikely that the call can be resumed. 25 and the voice processing unit 23 perform a process of notifying the user and the telephone partner (step S17), and then a disconnect command is sent to the mobile phone 100 via the control uplink 21A (step S18). As a result, the telephone line is automatically disconnected when it is difficult for the user to talk for a long time.

  On the other hand, when a response hold instruction is input via the operation unit 24 in step S4 (step S4: response hold), the control unit 20 sends a response hold command to the mobile phone 100 via the control uplink 21A ( Step S19) After the user is notified by the display unit 25 and the voice processing unit 23 that the response is pending (step S20), the system waits for input of a response hold cancellation instruction via the operation unit 24 (step S21). When a hold release instruction is input, the process proceeds to step S16. As a result, the user can manually put the response on hold state and can release the response hold state. The above is the operation when a call is received.

  Next, the mid-call process (step S8) will be described. FIG. 4 is a flowchart showing the mid-call process. First, the control unit 20 displays a message indicating that a call is in progress on the display unit 25 in order to notify the user that the call is in progress (step S31) and then the above-described step S5. And the call admissibility determination process (refer FIG. 2) similar to S13 is performed (step S32).

  If it is determined that the user is in a call-capable situation (step S33: call allowed), the control unit 20 determines whether there is an instruction (operation input) via the operation unit 24 (step S34). If there is no instruction, the process proceeds to step S32. On the other hand, if there is an instruction (operation input), if it is not a cutting instruction (step S35: NO), a process corresponding to the instruction (operation input) is executed. After (step S36), the process proceeds to step S32.

  Thus, it is continuously determined whether or not the user is in a state where the user can talk, and while it is determined that the user is in a state where the user can talk, the telephone call and various operations are maintained. However, when a disconnection instruction is input (step S35: YES), the control unit 20 sends a disconnect command to the mobile phone 100 via the control uplink 21A (step S37) to disconnect the telephone line.

  On the other hand, if it is determined in step S33 that the user is in a situation where it is difficult to talk, the control unit 20 starts a timer to measure the response hold time (step S40), and then places the mobile phone 100 in the response hold state. The process to be controlled is executed. Here, when the mobile phone 100 is in a call state, there is a restriction that the response hold function of the own device 100 cannot be used.

  For this reason, in the present embodiment, the control unit 20 causes the voice processing unit 23 to generate a response voice indicating that the call is being restricted (for example, “the conversation is temporarily suspended for safety”). Is transmitted to the mobile phone 100 via the voice uplink line 21C (step S41) to notify the telephone partner that the call is being restricted. The control unit 20 also emits the response voice from the speaker 40 or displays a message or icon indicating that the call is being restricted on the display unit 25 (step S42), so that the user is also restricting the call. Notify that. As a result, when the user is in a situation where it is difficult to make a call even during a call, the control unit 20 places the call on hold in a state where the telephone call by the user is restricted while the telephone line is kept connected. be able to.

  Subsequently, if the control unit 20 is in a call (step S43: YES), the control unit 20 executes a call admissibility determination process (step S44). When the control unit 20 determines that the user is in a difficult call state, the response hold time elapses. It is determined whether or not (step S46), and if it has not elapsed, the process proceeds to step S43. That is, after the mobile phone 100 is shifted to the response hold state, it is continuously determined whether or not the user is in a state where a call is possible.

  If the control unit 20 determines in step S45 that the user is in a callable state (step S33: call allowed), the control unit 20 stops outputting the response voice generated by the voice processing unit 23 (step S47). ), The process proceeds to step S32. Thereby, the control unit 20 promptly switches the mobile phone 100 to a call state and enables a hands-free call.

  In this case, the control unit 20 displays a message or icon to that effect on the display unit 25 to notify the user that the call restriction has been released, and the voice processing unit 23 displays a response voice to that effect. In order to notify the telephone partner that the call restriction has been released, the voice processing unit 23 transmits a response voice to that effect to the telephone partner side via the telephone line. This makes it possible to resume a telephone call smoothly and quickly.

  On the other hand, if the situation in which the user has difficulty in calling continues and the response hold time has elapsed (step S46: YES), the control unit 20 may continue the situation in which the user has difficulty in calling for a long time and may resume the call. Since it can be determined that the telephone line is disconnected, the display unit 25 and the voice processing unit 23 perform processing for notifying the user and the telephone partner that the telephone line is to be disconnected (step S48), and then a disconnect command is sent via the control uplink 21A. The data is sent to the mobile phone 100 (step S37). As a result, even when the telephone line is connected, the telephone line can be automatically disconnected if the user has difficulty in making a call for a long time.

  Further, when it is determined in step S43 that the call is not in progress (step S43: NO), that is, when the other party disconnects the telephone, the control unit 20 proceeds to the process in step S37 and enters the telephone line. Is automatically cut. Even during the response hold state (the processing period of steps S40 to S46), the control unit 20 receives a disconnection instruction from the user, and sends a disconnection command to the mobile phone 100 when the disconnection instruction is input. To do. As a result, the user can manually hang up the telephone even in the case of the response pending state.

  As described above, when detecting an incoming call, the hands-free call device 10 determines whether the user can talk or is difficult, and the mobile phone 100 is provided during the difficult call situation. When the user is placed in a response hold state by the automatic response function and then enters a state in which the user can make a call, the response hold state is canceled. Therefore, when the user can make a call, a telephone call can be made promptly.

  Also, the hands-free call device 10 determines whether the user is in a situation where the user can make a call or in a situation where the call is difficult even during a call, and when the call becomes difficult, the response voice generated by the voice processing unit 23 is displayed. Releases the call to the other party and keeps the call on hold. After that, when the user is ready to talk, the call is released, so the phone line can be connected even if the call is difficult during the call. The telephone call can be resumed promptly when the driving situation is possible.

  Therefore, this hands-free call device 10 can maintain the telephone line connected to the other party without rudeness by switching to a response hold state or a call ready state according to the user's situation, There is no need to perform complicated operations, and it is easy to use. In addition, the hands-free call device 10 automatically disconnects the telephone line even if the user has difficulty in making a call for a long period of time even if the user does not give a disconnection instruction. .

  The embodiment described above shows one aspect of the present invention, and does not limit the present invention, and can be arbitrarily changed within the scope of the present invention. Further, the configuration shown in the embodiment is not limited to the configuration, and can be appropriately changed without departing from the gist of the present invention. For example, in the above-described embodiment, the case of switching to the response hold state using the automatic response function provided in the mobile phone 100 at the time of an incoming call has been described, but it may be switched to the same response hold state as during a call.

  Further, in the above-described embodiment, the case where the mobile phone 100 is connected by wire is illustrated, but it may be wirelessly connected. In this case, the hands-free call device 10 and the mobile phone 100 may be provided with a wireless communication unit capable of wireless communication with each other. In the above-described embodiment, the case where the telephone terminal used in the hands-free communication device 10 is a mobile phone has been described. However, telephone terminals such as PHS, IP telephone, and automobile telephone can be widely applied. In the above-described embodiment, the case where the present invention is applied to a hands-free call device has been described. However, the present invention may be applied to an on-vehicle phone device such as a car phone.

  Furthermore, although the case where the control program is stored in the storage unit 21 in advance has been described in the above-described embodiment, the control program is recorded on a computer-readable recording medium such as a magnetic recording medium, an optical recording medium, or a semiconductor recording medium. The program may be stored in a medium, and the computer may read the control program from the recording medium and execute it. In addition, the control program may be downloaded from a distribution server or the like on a communication network via an electric communication line.

It is a block diagram which shows the hands-free call device which concerns on embodiment of this invention with the periphery structure. It is a flowchart which shows the operation | movement at the time of an incoming call. It is a flowchart which shows a call availability determination process. It is a flowchart which shows a process during a telephone call.

Explanation of symbols

10 Hands-Free Communication Device 20 Control Unit 21 Storage Unit 22 Vehicle Information Input I / F
23 voice processing unit 24 operation unit 25 display unit 30 microphone 40 speaker 100 mobile phone 110 navigation device

Claims (13)

In an in-vehicle telephone device arranged in a vehicle,
Information acquisition means for acquiring driving information relating to the driving state of the vehicle;
Control means for restricting the user's call according to the driving information,
When the control means detects an incoming call, it continuously determines whether the user is able to make a call based on the driving information or a situation where it is difficult to make a call. In response to the incoming call, the telephone line is connected, and the user's call is kept in a response on-hold state where the call cannot be made. Therefore, the on-vehicle telephone device is characterized in that the response hold state is canceled.   The control means continuously determines whether the user is able to make a call or a situation where it is difficult to make a call based on the driving information when a call is in progress. The in-vehicle telephone device according to claim 1, wherein the response hold state is canceled when it is determined that the situation is possible to be maintained and thereafter a call is possible. In an in-vehicle telephone device arranged in a vehicle,
Information acquisition means for acquiring driving information relating to the driving state of the vehicle;
Control means for restricting the user's call according to the driving information,
The control means continuously determines whether the user is able to make a call or a situation where it is difficult to make a call based on the driving information when a call is in progress. The response on-hold state in which the user's call is not possible is maintained, and after that, when it is determined that the call is possible, the response hold state is released to enable the user's call. An in-vehicle telephone device characterized by   A response voice transmitting means for transmitting a response voice indicating that the user is in a call restriction state to the telephone partner side via the telephone line when the control means enters the response hold state. Item 4. The on-vehicle telephone device according to any one of Items 1 to 3.   5. The in-vehicle telephone device according to claim 1, further comprising notification means for notifying the user that a call is being restricted when the control means is placed in the response hold state.   The in-vehicle telephone device according to any one of claims 1 to 5, wherein the control unit disconnects the telephone line when the response suspension state continues for a predetermined set time.   7. The in-vehicle telephone device according to claim 6, further comprising: a disconnect notification unit that notifies the user when the control unit disconnects the telephone line.   The in-vehicle telephone device according to any one of claims 1 to 7, wherein the in-vehicle telephone device is configured as a hands-free communication device to which a telephone terminal is connected and which controls a hands-free call via the telephone terminal. Telephone device. In a control method of an in-vehicle telephone device arranged in a vehicle,
When an incoming call is detected, it is continuously determined whether the user is able to talk based on driving information related to the driving state of the vehicle or a situation where it is difficult to talk. In response to an incoming call, the telephone line is connected, and the user's call is kept in a response on-hold state where the call cannot be made. Preferably, the response hold state is canceled, and the control method for the on-vehicle telephone device is characterized. In a control method of an in-vehicle telephone device arranged in a vehicle,
When a call is in progress, it is continuously determined whether the user can talk or is difficult based on the driving information related to the driving state of the vehicle. And maintaining the response hold state in which the user's call is not possible, and then determining that the call is possible, canceling the response hold state to enable the user's call. A control method for an in-vehicle telephone device. In a control program for controlling a vehicle-mounted telephone device arranged in a vehicle by a computer,
When an incoming call is detected, based on driving information related to the driving state of the vehicle, the user is allowed to continuously determine whether the call is possible or difficult, and while the call is difficult, Answer the incoming call, keep the telephone line connected, and keep the user in a call-holding state where the user cannot talk, and then call the user when it is determined that the call is possible Therefore, the control program for releasing the response hold state. In a control program for controlling a vehicle-mounted telephone device arranged in a vehicle by a computer,
When a call is in progress, the user can continuously determine whether the user is able to talk on the phone based on the driving information related to the driving state of the vehicle or the situation where the call is difficult. In the response hold state in which the user's call is not possible, and then, when it is determined that the call is possible, the response hold state is set to enable the user's call. A control program characterized by being released. 13. A computer-readable recording medium in which the control program according to claim 11 or 12 is recorded.

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