JP5213071B2 - Terminal having automatic hold function, method for realizing automatic hold function, and program for realizing automatic hold function - Google Patents

Description

  The present invention relates to control of a call holding state in a terminal device having a call function.

  When a voice call is performed using a communication terminal typified by a telephone, there is a case where it is desired to suspend the call for some reason. For example, when waiting for the other party to search for materials, or when checking the presence of the person in charge.

  In such a case, if the telephone handset of the telephone is left as it is, an unpleasant sound such as ambient noise is transmitted to the telephone of the other party. Therefore, in general, the communication is temporarily suspended after the noise is not transmitted by switching the communication state to the hold state. In addition, when this interruption occurs, a holding sound is generally transmitted to the communication terminal on the other side.

  For example, Patent Document 1 describes a technique in which a plurality of holding sounds are prepared and the other party uses different holding sounds. Patent Document 2 describes a technique for updating a holding tone.

JP 2008-136091 A JP 2008-48103 A

  As described above, by setting the communication state to the hold state, it is possible to send a hold sound instead of noise. In addition, an appropriate holding sound can be used by techniques such as Patent Documents 1 and 2.

  However, in order to place the communication state on hold, some kind of operation represented by pressing a button is required.

  For this reason, the user must always perform an operation in order to suspend the call, and this operation is a burden on the user. In addition, when the user forgets to perform an operation, there is a problem in that switching to the hold state is not performed and noise or the like is transmitted against the user's intention.

  Therefore, the present invention provides a terminal having an automatic hold function, an automatic hold function realization method, and an automatic hold function realization program capable of switching between a call state and a hold state without forcing the user to perform an operation such as pressing a button. For the purpose.

According to the first aspect of the present invention, an illuminance sensor that measures illuminance and quantifies the measured illuminance as an illuminance value in a terminal device that transmits and receives audio to and from other terminals, and the quantified illuminance value A handset having a handset that is used by a user to receive or transmit voice, an illuminance value stored in the storage unit, and an illuminance sensor this time are numerical values And a control unit that switches the communication state from either the call state or the hold state to the other based on the comparison result, and the illuminance sensor is provided in the handset. And storing the digitized illuminance value in the storage unit as a first illuminance value when communication is being established with another terminal device and a call is in progress, and the first illuminance value and this time Illuminance value digitized by the illuminance sensor When a first comparison is made to compare a certain second illuminance value, and the result of the first comparison is that the second illuminance value is darker than the first illuminance value, the communication state A terminal device is provided that performs a first switching to switch from a call state to a hold state .

According to the second aspect of the present invention, an illuminance sensor that measures illuminance and quantifies the measured illuminance as an illuminance value, a storage unit that stores the quantified illuminance value, and a user's hand. And a handset having a handset for receiving or transmitting voice, and a terminal device in which the illuminance sensor is provided in the handset has an illuminance value stored in the storage unit And the illuminance value digitized by the illuminance sensor this time, and based on the comparison result, the communication state is switched from either the call state or the hold state to the other, and communication is being established with another terminal device. The numerical illuminance value is stored in the storage unit as a first illuminance value when a call is in progress, and the first illuminance value and the illuminance value numerically expressed by the current illuminance sensor are stored. A first comparison comparing the illuminance values of two, If the result the second illuminance value of the comparison of the first is a value that indicates the dark than the first intensity value to perform a first switching switching to hold the communication state from the talking state A holding function realizing method is provided.

According to a third aspect of the present invention, in a holding function realization program incorporated in a terminal device that transmits and receives audio to and from other terminals, an illuminance sensor that measures illuminance and quantifies the measured illuminance as an illuminance value; A storage unit that stores the digitized illuminance value, a handset that is used by a user in hand and has a handset for receiving or transmitting voice, and an illuminance value that is stored in the storage unit And a controller that compares the illuminance value digitized by the illuminance sensor this time and switches the communication state from either the call state or the hold state to the other based on the comparison result, and the illuminance When the sensor is provided in the handset and communication is being established with another terminal device and a call is in progress, the digitized illuminance value is stored in the storage unit as a first illuminance value, and the first Illuminance value of 1 The first comparison of the second illuminance value, which is the illuminance value digitized by the illuminance sensor this time, is performed, and as a result of the first comparison, the second illuminance value is darker than the first illuminance value. A hold function realization program is provided that causes a computer to function as a terminal device that performs a first switch that switches a communication state from a call state to a hold state when the value indicates a state. The

  According to the present invention, since the call state and the hold state are switched based on the illuminance value measured by the illuminance sensor provided in the handset, the call state and the hold state can be changed without forcing the user to perform an operation such as pressing a button. It is possible to switch.

It is a figure showing the fundamental structure of the whole system of embodiment of this invention. It is a figure showing the fundamental structure of the telephone in embodiment of this invention. It is a flowchart showing the fundamental operation | movement of the telephone in embodiment of this invention. It is a flowchart showing the fundamental operation | movement at the time of pressing down the hold start button in embodiment of this invention. It is a flowchart showing the fundamental operation | movement at the time of pressing the hold cancellation | release button in embodiment of this invention.

  Next, the present embodiment will be described in detail with reference to the drawings.

  FIG. 1 is a diagram showing the entire telephone system of this embodiment. Referring to FIG. 1, the entire embodiment includes a telephone 100-1 to a telephone 100-m, an exchange 200, and a network 300.

  The telephones 100-1 to 100-n are extension telephones having a call function, and the telephones 100-1 to 100-n are accommodated in the exchange 200. In addition, this time, three telephones, the telephone 100-1, the telephone 100-2, and the telephone 100-n, are illustrated as extension telephones, but this is only an example. Any number of telephones can be connected to the exchange 200. Further, a part or all of each extension telephone may be connected by a bus as long as the exchange 200 and each extension telephone are compatible.

  The exchange 200 is generally called a device such as a private branch exchange (PBX), a private branch exchange, a line switch, or a main device, and is connected to a network 300 that is a public network (so-called external line). The exchange 200 mainly controls outgoing / incoming calls from outside lines and calls between extensions.

  The network 300 is a public network. The network 300 is connected to telephones 100-n + 1 to 100-m.

  Each telephone is a telephone terminal directly operated by a user. Each telephone can make a call with another telephone accommodated in the exchange 200 and with another telephone connected to the network 300. It is not the gist of the present embodiment which communication system each telephone is compliant with. Any voice communication method can be adopted as long as a voice call is possible in each telephone period.

  Next, the configuration of each telephone will be described with reference to FIG. In FIG. 2, the telephone 100 is shown as a telephone representative of each telephone. It is assumed that each telephone has the same configuration as the telephone 100.

  Referring to FIG. 2, the telephone 100 includes a telephone main body 110 and a handset 120.

  Further, the telephone body 110 includes a switching SW 111, a hold sound sending unit 112, a RAM 113, a control unit 114, a call detection unit 115, a hold start button 116, and a hold release button 117.

  The handset 120 includes a receiver 121, a transmitter 122, and an illuminance sensor 123.

  The switch SW 111 is a switch (Switch) for switching a signal transmitted to another telephone. Specifically, by switching the switching SW 111, either the hold sound sent by the hold sound sending unit 112 or the voice sent via the call detection unit 115 is sent to another telephone.

  Here, in the present embodiment, a state in which communication is established between the telephone 100 and another telephone is referred to as “communication being established”. In addition, a state in which communication is being established and a holding tone transmitted by the holding tone sending unit 112 is being transmitted to another telephone (that is, a state where the switch SW 111 is switched to the holding tone sending unit 112). Called “pending”. Furthermore, the state in which communication is being established and the voice transmitted from the transmitter 112 is being transmitted to another telephone (that is, the state in which the switch SW 111 is switched to the transmitter 112) is “in a call” "

  The holding sound sending unit 112 generates a holding sound when the holding sound is in a holding state, and sends the generated holding sound to the switching SW 111. The specific tone of the holding sound is not the gist of the present embodiment, and any sound can be used as the holding sound.

  It is also conceivable that the holding sound is silenced. In the case of silence, when the switch SW 111 is switched to the hold sound sending unit 112, no sound is transmitted to the telephone of the other party.

  The RAM 113 is a storage device realized by a RAM (Random Access Memory), and stores illuminance and the like detected by an illuminance sensor.

  The control unit 114 has a function of controlling each unit of the telephone 100. The control unit 114 is realized by, for example, an arithmetic processing device represented by a CPU (Central Processing Unit) and a storage device in which a program is stored.

  The call detection unit 115 determines whether or not the telephone 100 is currently in a call state. Then, it notifies the control unit 114 whether or not the telephone 100 is currently in a call state. Furthermore, the call detecting unit 115 outputs the sound detected by the transmitter 122 (including not only the voice uttered by the user but also surrounding sounds) to the switch SW111.

  The hold start button 116 and the hold release button 117 are buttons for accepting an operation from the user, and accept a hold start or hold release instruction. The hold start button 116 and the hold release button 117 notify the control unit 114 when an operation is accepted. The hold start button 116 and the hold release button 117 may be realized as physical buttons or may be realized as virtual buttons displayed on the touch panel, for example.

  The handset 121 and the handset 122 are general handset and handset, and the handset 120 is realized as a handset by the handset 121 and the handset 122. The illuminance sensor 123 is a sensor for sensing ambient illuminance, and can sense illuminance and digitize the sensed illuminance as an “illuminance value”. The illuminance sensor 123 is mounted in a place that becomes dark when the handset 120 is placed on a desk or the like. Here, the place where the illuminance sensor is mounted is mounted at the position of the handset where the light intensity incident when the handset is placed on a desk or the like at a predetermined angle becomes weaker than the light intensity incident during a call. The For example, when the phone is placed on a desk or the like at a predetermined angle, it is not touched by the ear applied to the handset during a call, is not covered by the palm holding the handset, is not darkened by the face, etc. It is a darkened position. More specifically, the position may be, for example, a side surface of the handset assuming that the handset is placed on a desk or the like sideways. The illuminance sensor may be specifically realized in any way, but can be realized by, for example, a sensor using a phototransistor, a sensor using a photodiode, a sensor in which an amplifier circuit is added to the photodiode, or the like.

  Note that the handset 120 is used separately from the telephone body 110, but when separated, the telephone body 110 and the handset 120 may be connected by wire or wirelessly.

  In the case of wireless connection, it is realized as a slave unit of a so-called cordless telephone. In many cases, the cordless telephone handset is used away from the telephone body (base phone), and the buttons and the like provided on the base phone cannot be easily operated during a call. However, by using the present embodiment for the cordless telephone cordless handset, it is possible to shift to the hold state or cancel the hold state without operating the buttons provided on the base phone. Further, there is no need to provide a button for shifting to the hold state or canceling the hold state on the slave unit.

  The RAM 113 is realized by hardware called a storage device, but the other units may be realized by hardware or a combination of hardware and software. For example, an arithmetic processing device included in the control unit 114 reads out a program (software) from a storage device included in the control unit 114 and performs arithmetic processing based on the program while using the RAM 113 to realize each unit. May be. That is, the telephone 100 is realized by software cooperating with hardware resources.

  Moreover, each part shown in FIG. 2 is only a part especially relevant to this embodiment among each part which the telephone 100 has. The telephone 100 has a portion in which illustration of a power source and the like is omitted in order to operate as a general telephone.

  In this embodiment, only during the establishment of communication, the operation automatically shifts to or cancels the hold operation at the brightness detected by the illuminance sensor 123. Specifically, the illuminance sensor 123 placed inside the handset 120 detects that the user placed the handset 120, and if the state continues for a predetermined time or longer, it is generated by the holding sound sending unit 112. Send a hold sound. This transmission is realized by the control unit 114 controlling the switching SW 111. Further, by pressing the hold start button 116 and the hold release button 117, it is possible to arbitrarily send and release the hold sound.

  Next, the operation of this embodiment will be described in detail with reference to the drawings.

  First, the basic operation of this embodiment will be described with reference to the flowchart of FIG.

  First, when the control unit 114 detects the start of a call via the call detection unit 115, the control unit 114 detects the illuminance value measured by the illuminance sensor 123 and stores it in the RAM 113 (step A11). Note that the illuminance value stored in the RAM 113 in step A11 is referred to as a “first value”.

  Thereafter, the control unit 114 periodically checks whether or not the call continues by monitoring the call detection unit 115 (step A12). If it can be determined that the call has already ended (NO in step A12), the process ends.

  On the other hand, when the call is in progress (YES in step A12), control unit 114 periodically detects the illuminance value of illuminance sensor 123 (step A13). Here, the illuminance value detected in step A13 is referred to as a second value.

  Then, in step A14, the second value is compared with the first value which is the illuminance value stored in the RAM 113 at the start of the call (step A14).

  As a result of the comparison, if it is determined that the second value is not a value indicating a darker state than the first value stored in the RAM 113 (NO in step A14), the process returns to step A12 and the operation is performed. continue.

  On the other hand, as a result of the comparison, if it is determined that the second value is a value indicating a darker state than the first value stored in the RAM 113 (YES in step A14), the second value Is stored in the RAM 113 to update the illuminance value (step A15).

  Thereafter, by switching the switch of the switch SW 111, the hold sound is sent from the hold sound sending unit 112 to the handset 121 of the handset 120, and the telephone shifts to the hold state (step A14).

  After shifting to the hold state, the control unit 114 periodically checks whether or not communication is established by monitoring the call detection unit 115 (step A17). If it can be determined that communication is not established (NO in step A17), the process is terminated.

  On the other hand, when communication is being established (YES in step A17), the control unit 114 periodically detects the illuminance value of the illuminance sensor 123 (step A18). Here, the illuminance value detected in step A18 is referred to as a third value.

  In step A15, the third value is compared with the second value that is the illuminance value stored in the RAM 113 (step A19).

  As a result of the comparison, if it is determined that the third value is not a value indicating a brighter state than the second value stored in the RAM 113 (NO in step A19), the process returns to step A17 to perform the operation. continue.

  On the other hand, as a result of the comparison, if it is determined that the third value is a value indicating a brighter state than the second value stored in the RAM 113 (YES in step A19), the third value Is stored in the RAM 113 to update the illuminance value (step A20). The third value is stored as a new first value.

  Thereafter, the switch of the switch SW 111 is switched to the transmitter 122 of the handset 120 to shift to the hold release state (step A21).

  Next, the operation when the hold start button 116 is pressed will be described with reference to the flowchart of FIG.

  First, the control unit 114 detects pressing of the hold start button 116 (step A31). Subsequently, the control unit 114 confirms whether the telephone state is on hold (step A32).

  Here, when it can be determined that the state of telephone 100 is on hold (YES in step A32), telephone 100 continues to operate from step A17 of FIG.

  On the other hand, when the state of telephone 100 is not on hold (NO in step A12), it is determined whether a call is in progress (step A33).

  Here, when it can be determined that the state of telephone 100 is not in a call (NO in step A33), the process is terminated.

  On the other hand, if it can be determined that the state of the telephone 100 is that the telephone 100 is busy (YES in step A33), the current illuminance value of the illuminance sensor 123 is stored in the RAM 113 as the second value, thereby obtaining the illuminance. The value is updated (step A34). Thereafter, by switching the switch of the switch SW 111, the hold sound is sent from the hold sound sending unit 112 to the handset 121 of the handset 120, the telephone shifts to the hold state (step A35), and the operation is continued from step A17 of FIG.

  Next, the operation when the hold release button 117 is pressed will be described with reference to the flowchart of FIG.

First, the control unit 114 detects the depression of the hold release button 11 7 (step A41). Subsequently, the control unit 114 confirms whether the state of the telephone is on hold (step A42).

  If it is determined that it is on hold (YES in step A12), the operation is continued from step A20 in FIG.

  On the other hand, if it is determined that the state of the telephone is not on hold (NO in step A12), the call state is entered. That is, the operation is continued from step A12 in FIG.

  In steps A14 and A19 of this embodiment, the determination is made by comparing the illuminance values. Specifically, the determination is made based on whether or not the difference between the illuminance value stored in the RAM 113 and the current illuminance value exceeds a threshold value. In this determination, it is assumed that the threshold value of the illuminance value for shifting to the hold during the call and the threshold value of the illuminance value for shifting from the hold state to the call state can be arbitrarily set.

  In addition, it is possible to arbitrarily set how long the state exceeding the threshold value should be determined to exceed the threshold value. Furthermore, the interval time for detecting the illuminance can be arbitrarily set.

  In the embodiment described above, switching the call state to the hold state or switching the hold state to the call state has been described. In this regard, the pending state in the present embodiment refers to various states.

  In other words, the hold sound generated by the hold sound sending unit 112 may be sent to the other party, or the hold sound may be silent. Also, the voice sent from the other party may be turned off when in the hold state. That is, no sound may be sent from the handset 121. Also, the voice may be played from the handset 121 even in the on-hold state.

  Furthermore, in the on-hold state, a speaker microphone provided in addition to the transmitter 122 and the receiver 121 may be used so that voice can be transmitted and received in a hands-free manner. Here, hands-free means a state in which a user can transmit and receive voice without having a handset, and is realized by a loudspeaker speaker and a microphone that picks up a wide range of sounds.

  In the embodiment of the present invention described above, when the handset is placed by the illuminance sensor provided in the handset, the illuminance sensor senses the darkness, and automatically controls the switching SW in the telephone. It is possible to shift to the hold state. Therefore, even if the user presses the hold start button or the like, there is an effect that it is not necessary to let the other party hear the noise heard when the handset is left.

  The terminal device having the automatic hold function according to the embodiment of the present invention can be realized by hardware, but the computer uses a program for causing the computer to function as the terminal device having the automatic hold function. It can also be realized by reading and executing from a readable recording medium.

  Further, the method for realizing the automatic hold function according to the embodiment of the present invention can be realized by hardware, but the computer reads a program for causing the computer to execute the method from a computer-readable recording medium and executes the program. Can also be realized.

  Moreover, although the above-described embodiment is a preferred embodiment of the present invention, the scope of the present invention is not limited only to the above-described embodiment, and various modifications are made without departing from the gist of the present invention. Implementation in the form is possible.

  A part or all of the above-described embodiment can be described as in the following supplementary notes, but is not limited thereto.

(Supplementary note 1) In a terminal device that transmits and receives audio to and from other terminals,
An illuminance sensor that measures illuminance and quantifies the measured illuminance as an illuminance value;
A storage unit for storing the digitized illuminance value;
A handset that has a handset that a user uses in hand and receives or transmits audio;
The illuminance value stored in the storage unit is compared with the illuminance value digitized by the illuminance sensor this time, and based on the result of the comparison, the communication state is changed from either the call state or the hold state to the other. A control unit for switching;
With
The terminal device, wherein the illuminance sensor is provided in the handset.

(Supplementary Note 2) In the terminal device described in Supplementary Note 1,
When communication is established with another terminal device and a call is in progress, the digitized illuminance value is stored in the storage unit as a first illuminance value, and the first illuminance value and the current illuminance sensor are A first comparison that compares a second illuminance value that is a digitized illuminance value, and a value indicating that the second illuminance value is darker than the first illuminance value as a result of the first comparison. If there is a terminal device, a first switching is performed to switch the communication state from the call state to the hold state.

(Appendix 3) In the terminal device described in Appendix 2,
The first switching is performed and the second illuminance value is stored in the storage unit, and the second illuminance value is compared with a third illuminance value which is an illuminance value digitized by the illuminance sensor this time. If the result of the second comparison shows that the third illuminance value is brighter than the second illuminance value, the communication state is switched from the hold state to the call state. 2. A terminal device characterized by switching between two.

(Supplementary Note 4) In the terminal device according to Supplementary Note 3,
While performing the second switching, the third illuminance value is stored as a new first illuminance value in the storage unit, and the new first illuminance value and the second illuminance value are used as comparison targets. A terminal device that performs a first comparison.

(Appendix 5) In the terminal device described in Appendix 2,
It further comprises a hold state release button for accepting a transition instruction from the user to the call state,
When the communication state is the hold state and the instruction to shift to the call state is accepted, the communication state is switched from the call state to the hold state, and the illuminance value that the illuminance sensor has digitized is newly added to the storage unit. A terminal device that stores the first illuminance value and performs the first comparison using the new first illuminance value and the second illuminance value as comparison targets.

(Appendix 6) In the terminal device described in Appendix 3,
It further includes a hold state start button for accepting an instruction to shift to the hold state from the user,
When the communication state is the call state, when the instruction to shift to the hold state is accepted, the communication state is switched from the hold state to the call state, and the illuminance value that the illuminance sensor has digitized is newly added to the storage unit. A terminal device that stores the second illuminance value and performs the second comparison using the new second illuminance value and the third illuminance value as comparison targets.

(Appendix 7) An illuminance sensor that measures illuminance and quantifies the measured illuminance as an illuminance value;
A storage unit for storing the digitized illuminance value;
A handset that has a handset that a user uses in hand and receives or transmits audio;
A terminal device in which the illuminance sensor is provided in the handset,
The illuminance value stored in the storage unit is compared with the illuminance value digitized by the illuminance sensor this time, and based on the result of the comparison, the communication state is changed from either the call state or the hold state to the other. A method for realizing a hold function, characterized by switching.

(Supplementary Note 8) In the hold function realizing program incorporated in the terminal device that transmits and receives audio to and from other terminals,
An illuminance sensor that measures illuminance and quantifies the measured illuminance as an illuminance value;
A storage unit for storing the digitized illuminance value;
A handset that has a handset that a user uses in hand and receives or transmits audio;
The illuminance value stored in the storage unit is compared with the illuminance value digitized by the illuminance sensor this time, and based on the result of the comparison, the communication state is changed from either the call state or the hold state to the other. A control unit for switching;
With
A storage function realizing program that causes a computer to function as a terminal device in which the illuminance sensor is provided in the handset.

100-1 to 100-m Telephone 110 Telephone body 111 Switching SW
112 On-hold sound sending unit 113 RAM
114 Control unit 115 Call detection unit 116 Hold start button 117 Hold release button 120 Handset 121 Handset 122 Transmitter 123 Illuminance sensor

Claims (5)

In a terminal device that transmits and receives audio to and from other terminals,
An illuminance sensor that measures illuminance and quantifies the measured illuminance as an illuminance value;
A storage unit for storing the digitized illuminance value;
A handset that has a handset that a user uses in hand and receives or transmits audio;
The illuminance value stored in the storage unit is compared with the illuminance value digitized by the illuminance sensor this time, and based on the result of the comparison, the communication state is changed from either the call state or the hold state to the other. A control unit for switching;
With
The illuminance sensor is provided in the handset ;
When communication is established with another terminal device and a call is in progress, the digitized illuminance value is stored in the storage unit as a first illuminance value, and the first illuminance value and the current illuminance sensor are A first comparison that compares a second illuminance value that is a digitized illuminance value, and a value indicating that the second illuminance value is darker than the first illuminance value as a result of the first comparison. If there is a terminal device, a first switching is performed to switch the communication state from the call state to the hold state . The terminal device according to claim 1 ,
The first switching is performed and the second illuminance value is stored in the storage unit, and the second illuminance value is compared with a third illuminance value which is an illuminance value digitized by the illuminance sensor this time. If the result of the second comparison shows that the third illuminance value is brighter than the second illuminance value, the communication state is switched from the hold state to the call state. 2. A terminal device characterized by switching between two. The terminal device according to claim 2 ,
While performing the second switching, the third illuminance value is stored as a new first illuminance value in the storage unit, and the new first illuminance value and the second illuminance value are used as comparison targets. A terminal device that performs a first comparison. An illuminance sensor that measures illuminance and quantifies the measured illuminance as an illuminance value;
A storage unit for storing the digitized illuminance value;
A handset that has a handset that a user uses in hand and receives or transmits audio;
A terminal device in which the illuminance sensor is provided in the handset,
The illuminance value stored in the storage unit is compared with the illuminance value digitized by the illuminance sensor this time, and based on the result of the comparison, the communication state is changed from either the call state or the hold state to the other. Switching ,
When communication is established with another terminal device and a call is in progress, the digitized illuminance value is stored in the storage unit as a first illuminance value, and the first illuminance value and the current illuminance sensor are A first comparison that compares a second illuminance value that is a digitized illuminance value, and a value indicating that the second illuminance value is darker than the first illuminance value as a result of the first comparison. A holding function realizing method characterized by performing a first switching to switch the communication state from the call state to the hold state if there is . In a holding function realization program incorporated in a terminal device that transmits / receives audio to / from another terminal,
An illuminance sensor that measures illuminance and quantifies the measured illuminance as an illuminance value;
A storage unit for storing the digitized illuminance value;
A handset that has a handset that a user uses in hand and receives or transmits audio;
The illuminance value stored in the storage unit is compared with the illuminance value digitized by the illuminance sensor this time, and based on the result of the comparison, the communication state is changed from either the call state or the hold state to the other. A control unit for switching;
With
The illuminance sensor is provided in the handset ;
When communication is established with another terminal device and a call is in progress, the digitized illuminance value is stored in the storage unit as a first illuminance value, and the first illuminance value and the current illuminance sensor are A first comparison that compares a second illuminance value that is a digitized illuminance value, and a value indicating that the second illuminance value is darker than the first illuminance value as a result of the first comparison. A holding function realizing program that causes a computer to function as a terminal device that performs a first switching to switch a communication state from a call state to a holding state if there is .

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