Call program, call system, and call method

Abstract

To improve the efficiency of calling specified call recipients. [Solution] The call program causes the processor to realize a call function for making a call to the recipient terminal to be called, a recipient voice acquisition function for acquiring the recipient voice input to the recipient terminal, a speech voice generation function for generating a speech voice to be transmitted to the recipient terminal based on the content of the recipient voice, a speech function for transmitting the speech voice to the recipient terminal, and a speaker switching function for switching the input channel of the speech voice to be transmitted to the recipient terminal to the user of the speaker terminal when the recipient voice satisfies a predetermined condition.

Description

[Technical field]

[0001] At least one embodiment of the present invention relates to a calling program, a calling system, and a calling method. [Background technology]

[0002] Patent Document 1 describes an automatic call device that notifies a voice message. The automatic call device causes a computer device to execute a function of acquiring a call recipient list, a function of selecting a call recipient from the call recipient list, a function of calling the call recipient, a function of providing a voice message when the call recipient is called, and a function of selecting another call recipient from the call recipient list when the call recipient cannot be called. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-034757 Summary of the Invention [Problem to be solved by the invention]

[0004] Tele-appointments are one of the sales methods that utilize telephones. A human telephone appointment maker refers to a prepared list of people to call, such as a customer list, and calls the people in order to set up an appointment. With traditional methods, there is a limit to the amount of human activity that can be done, so the results that each person can achieve are limited.

[0005] In addition, if the intended callee is a person in charge or a senior executive at a company, the person in charge may not necessarily answer the phone first. For example, the company's reception desk may take the call first and then transfer it to the person in charge or a senior executive. For this reason, it used to take a long time for the telephone appointment maker to start a conversation with the intended callee.

[0006] An object of at least one embodiment of the present invention is to provide a calling program, a calling system, and a calling method that solve the above problems and improve the efficiency of calling a specified call recipient. [Means for solving the problem]

[0007] From a non-limiting perspective, a call program according to one embodiment of the present invention causes a processor to realize a call function for making a call to a recipient terminal to be called, a recipient voice acquisition function for acquiring a recipient voice input to the recipient terminal, a speech voice generation function for generating a speech voice to be transmitted to the recipient terminal based on the content of the recipient voice, a speech function for transmitting the speech voice to the recipient terminal, and a speaker switching function for switching the input channel of the speech voice to be transmitted to the recipient terminal to the user of the speaker terminal when the recipient voice satisfies a predetermined condition.

[0008] From a non-limiting perspective, a calling system according to one embodiment of the present invention is a calling system having one or more processors, which realizes in the processor a call function for making a call to a recipient terminal to be called, a recipient voice acquisition function for acquiring a recipient voice input to the recipient terminal, a speech voice generation function for generating a speech voice to be transmitted to the recipient terminal based on the content of the recipient voice, a speech function for transmitting the speech voice to the recipient terminal, and a speaker switching function for switching the input channel of the speech voice to be transmitted to the recipient terminal to the user of the speaker terminal when the recipient voice satisfies a predetermined condition.

[0009] From a non-limiting perspective, a calling method according to one embodiment of the present invention is a calling method by an apparatus equipped with a processor, and includes a calling step of making a call to a recipient terminal to be called, a recipient voice acquisition step of acquiring a recipient voice input to the recipient terminal, a speech voice generation step of generating a speech voice to be transmitted to the recipient terminal based on the content of the recipient voice, a speaking step of transmitting the speech voice to the recipient terminal, and a speaker switching step of switching the input channel of the speech voice to be transmitted to the recipient terminal to the user of the speaker terminal when the recipient voice satisfies a predetermined condition. Effect of the Invention

[0010] Each embodiment of the present application addresses one or more of the deficiencies. [Brief description of the drawings]

[0011] [Figure 1] FIG. 1 is a block diagram showing an example of the configuration of a call system corresponding to at least one of the embodiments of the present invention. [Diagram 2] FIG. 2 is a block diagram showing a configuration of a server according to at least one of the embodiments of the present invention. [Diagram 3] 1 is a flowchart showing an example of processing of a calling system corresponding to at least one of the embodiments of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, examples of embodiments of the present invention will be described with reference to the drawings. Note that the various components in the examples of the embodiments described below can be appropriately combined to the extent that no inconsistencies or the like arise. In addition, the contents described as an example of one embodiment may be omitted in other embodiments. In addition, the contents of operations and processes that are not related to the characteristic parts of each embodiment may be omitted. Furthermore, the order of various processes that make up the various flows and sequences described below is random to the extent that no inconsistencies or the like arise in the processing contents.

[0013] In the following, a call program executed in a server, which is an example of a computer, is described as an example. However, the computer may be another device such as a user terminal. In addition, the call system as a whole may execute the call program.

[0014] Fig. 1 is a block diagram showing an example of the configuration of a calling system corresponding to at least one of the embodiments of the present invention. The calling system 1 includes a server 10 and a user terminal 20 used by a user of the calling system 1. Each of the user terminals 20A, 20B, and 20C is an example of the user terminal 20. The configuration of the calling system 1 is not limited to this. For example, the calling system 1 may be configured such that a single user terminal is used by multiple users. The calling system 1 may also include multiple servers.

[0015] The server 10 and the user terminal 20 are examples of devices. The server 10 and the user terminal 20 are each communicatively connected to a communication network 30. The connection between the communication network 30 and the server 10, and the connection between the communication network 30 and the user terminal 20 may be a wired connection or a wireless connection. The communication network 30 may be an Internet line, an analog telephone line, or a line that combines these.

[0016] The call system 1 includes a server 10 and a user terminal 20, and thereby realizes various functions for executing various processes in response to user operations.

[0017] The server 10 includes a processor 11, a memory 12, and a storage device 13. The processor 11 is, for example, a central processing unit such as a CPU (Central Processing Unit) that performs various calculations and control. In addition, when the server 10 includes a GPU (Graphics Processing Unit), some of the various calculations and control may be performed by the GPU. The server 10 executes various information processing by the processor 11 using data read into the memory 12, and stores the obtained processing results in the storage device 13 as necessary.

[0018] The storage device 13 has a function as a storage medium for storing various information. The configuration of the storage device 13 is not particularly limited, but may be configured to store all of the various information required for the control performed by the calling system 1 from the viewpoint of reducing the processing load on the user terminal 20. Examples of such a configuration include an HDD and an SSD. However, the storage device for storing the various information only needs to have a storage area accessible by the server 10, and may be configured to have a dedicated storage area outside the server 10, for example.

[0019] The user terminal 20 is managed by a user. The user here includes a telephone appointment maker and a callee who is the intended party to whom the telephone appointment maker makes a call. Examples of the user terminal 20 include a landline telephone terminal, a mobile phone terminal, a smartphone, a personal computer, a tablet, and the like. The user terminal 20 may be a speaker terminal or a receiver terminal, which will be described later.

[0020] The user terminal 20 may be equipped with hardware and software for connecting to the communication network 30 and executing various processes by communicating with the server 10. Each of the multiple user terminals 20 may be configured to be able to communicate directly with each other without going through the server 10.

[0021] The user terminal 20 may include a processor 21, a memory 22, and a storage device 23. The processor 21 is, for example, a central processing unit such as a CPU (Central Processing Unit) that performs various calculations and control. In addition, if the user terminal 20 includes a GPU (Graphics Processing Unit), some of the various calculations and control may be performed by the GPU. The user terminal 20 executes various information processing in the processor 21 using data read into the memory 22, and stores the obtained processing results in the storage device 23 as necessary. The storage device 23 functions as a storage medium that stores various information.

[0022] 2 is a block diagram showing the configuration of a server corresponding to at least one of the embodiments of the present invention. The server 10 includes a calling unit 101, a receiver voice acquiring unit 102, a speech sound generating unit 103, a speaking unit 104, and a speaker switching unit 105. The processor included in the server 10 refers to a call program stored in a storage device and executes the program to functionally realize the calling unit 101, the receiver voice acquiring unit 102, the speech sound generating unit 103, the speaking unit 104, and the speaker switching unit 105.

[0023] The calling unit 101 has a function of making a call to the recipient terminal to be called. The recipient voice acquisition unit 102 has a function of acquiring the recipient voice input to the recipient terminal. The speech generation unit 103 has a function of generating a speech to be transmitted to the recipient terminal based on the contents of the recipient voice. The speech unit 104 has a function of transmitting the speech to the recipient terminal. The speaker switching unit 105 has a function of switching the input channel of the speech to be transmitted to the recipient terminal to the user of the speaker terminal when the recipient voice satisfies a predetermined condition.

[0024] The recipient terminal is a terminal that receives a call from the telephone appointment point. For example, the recipient terminal of a company may be a landline telephone or a mobile phone terminal. The recipient terminal is an example of the above-mentioned user terminal 20. The telephone number of the recipient terminal to be called may be specified by the user of the call system 1. A list containing the telephone numbers of the recipient terminals to be called may be stored in advance in the memory 12, and the call unit 101 may obtain the telephone number of the recipient terminal to be called from the list.

[0025] The listener's voice input to the listener's terminal may be converted into digital data before it is delivered from the listener's terminal to the server 10 .

[0026] [Speech generation] When the call recipient is a person in charge or a person in a high position in a company, the person in charge does not necessarily answer the phone. For example, the company's reception desk may temporarily receive the call and transfer the call to the person in charge or a person in a high position. For this reason, in the past, it took a long time for the telephone appointment maker to start a conversation with the intended call recipient. In the embodiment of the present disclosure, in order to improve the efficiency of the work, the call system 1, rather than a human telephone appointment maker, handles the call from the time the call is made to the intended call recipient until the call is connected to the intended call recipient (such as the person in charge or a person in a high position) . Therefore, the call system 1 generates a speech voice to respond to the recipient until the call is transferred to the telephone appointment maker.

[0027] The speech generation unit 103 generates a speech to be transmitted to the listener terminal, based on the contents of the listener voice acquired from the listener terminal.

[0028] The speech generation unit 103 may generate speech using AI. For example, the speech generation unit 103 includes a large-scale language model (LLM). The speech generation unit 103 inputs the recipient's speech or information obtained by converting the recipient's speech to the LLM, thereby generating speech to be transmitted to the recipient's terminal.

[0029] The LLM may generate text data to be transmitted to the listener terminal. The speech generator 103 converts the text data into speech. The LLM may directly generate speech to be transmitted to the listener terminal.

[0030] The speech generation unit 103 may generate speech using a rule-based AI. In this case, the speech generation unit 103 analyzes the contents of the receiver's speech acquired from the receiver's terminal. For example, the speech generation unit 103 calculates the similarity between text data obtained by converting the receiver's speech into text and a scenario of the receiver's utterance registered in the memory 12 in advance. For example, if the text data obtained by converting the receiver's speech into text is "This is XX Co., Ltd.", the text data has a high similarity to the scenario of the receiver's utterance registered in the memory 12, "Yes, this is XX Co., Ltd." The speech generation unit 103 extracts a scenario that has a high similarity to the text data obtained by converting the receiver's speech into text from the memory 12, and identifies a message stored in the memory 12 in association with the extracted scenario as the speech text. Such a correspondence between the scenario of the receiver's utterance and the message as the speech text may be stored in the memory 12 in advance in the form of a table or the like.

[0031] The speech generation unit 103 may determine the content of the speech based on a conditional branch implemented in the rule-based AI. For example, the speech generation unit 103 converts the listener's voice into text and determines whether the text of the listener's voice contains a predetermined keyword. The content of the speech to be generated is changed depending on whether the predetermined keyword is included.

[0032] The speech voice does not have to be generated from scratch, but may be generated by combining parts of speech voices recorded in advance according to the contents of the received voice.

[0033] The speech unit 104 transmits the speech voice to the receiver's terminal. From the time the call is made to the call recipient until the call is connected to the call recipient (such as the person in charge or a person in a managerial position), the speech unit 104 transmits the speech voice generated by the speech voice generation unit 103 to the receiver's terminal. On the other hand, after the call is connected to the call recipient, the speech unit 104 transmits the speech voice uttered by the user of the call recipient's terminal to the receiver's terminal. The caller's terminal is, for example, a terminal used by a telephone appointment pointer, who is a human. The speaker switching unit 105 switches the speaker on the caller's side.

[0034] The speaker switching unit 105 has a function of switching the input channel of the uttered voice to be transmitted to the listener terminal to the user of the speaker terminal when the listener voice satisfies a predetermined condition.

[0035] The predetermined condition for the speaker switching unit 105 to switch the input channel may be, for example, the following condition. (Condition 1) It must be possible to determine that the person inputting the receiver's voice is the person to whom the call is being made. (Condition 2) It can be estimated that the person inputting the recipient's voice will change from a person who is not the call recipient to a person who is the call recipient.

[0036] The above-mentioned (Condition 1) will be explained in more detail. For convenience of explanation, the call target is denoted as A. Call target A is, for example, a manager of a company. A person who is not a call target is denoted as B. Call target B is, for example, a receptionist of a company.

[0037] When the receiver's voice contains a keyword such as "Yes, this is A" that can be used to determine that the person currently receiving the call is the call recipient A, the speaker switching unit 105 determines that the predetermined condition 1 is satisfied and switches the input channel of the spoken voice to the user of the speaker's terminal. Also, the voice characteristics of the call recipient may be registered in advance in the memory 12 of the server 10. The speaker switching unit 105 may compare the voice characteristics included in the receiver's voice with the voice characteristics of the call recipient registered in the memory 12 to determine that the person inputting the receiver's voice is the call recipient. The speaker switching unit 105 may combine the determination based on the keyword and the determination based on the voice characteristics comparison to determine that the person inputting the receiver's voice is the call recipient.

[0038] The above-mentioned (Condition 2) will be explained in more detail. When the receiver's voice contains a predetermined keyword such as "Please wait a moment" or "This will be handed over to A" that indicates that the person answering the phone will change from a person who is not the call target to the call target, the speaker switching unit 105 determines that the predetermined condition 2 is met and switches the input channel of the spoken voice to the user of the speaker's terminal. The predetermined keyword may be stored in the memory 12 in advance.

[0039] When the person answering the phone changes from the person B who is not the call target to the person A who is the call target, a tone on hold may be played during that time. Therefore, when the receiver's voice contains a tone on hold, the speaker switching unit 105 determines that the predetermined condition 2 is satisfied and switches the input channel of the voice to the user of the speaker's terminal.

[0040] FIG. 3 is a flowchart showing an example of processing of a call system corresponding to at least one of the embodiments of the present invention.

[0041] The calling unit 101 calls the recipient terminal to which the call is to be made (St11). The recipient voice acquiring unit 102 acquires the recipient voice input to the recipient terminal (St12).

[0042] The speaker switching unit 105 judges whether the listener's voice satisfies a predetermined condition (St13). If the listener's voice satisfies the predetermined condition (St13: YES), the process proceeds to step St16. If the listener's voice does not satisfy the predetermined condition (St13: NO), the process proceeds to step St14.

[0043] In step St14, the speech generation unit 103 generates a speech to be transmitted to the listener terminal based on the contents of the listener voice. The speech unit 104 transmits the speech to the listener terminal (St15). After that, the process returns to step St12, and the next listener voice is obtained from the listener terminal.

[0044] In step St16, the speaker switching unit 105 switches the input channel of the uttered voice to be transmitted to the listener terminal to the user of the speaker terminal. After that, the telephone appointmenter, who is the user of the speaker terminal, talks with the listener.

[0045] An example of a telephone conversation using the call system 1 according to an embodiment of the present disclosure will be described below. [Conversation example 1] In conversation example 1, the intended call recipient A answers the phone at the receiver's terminal from the beginning. Therefore, the receiver's voice acquired in step St12 includes the utterance "Hello, this is A." Then, since the receiver's voice satisfies the above-mentioned (Condition 1), the process transitions from step St13 to step St16. The speaker switching unit 105 switches the input channel of the uttered voice to be transmitted to the receiver's terminal to the user of the speaker's terminal. In other words, from the beginning, a human user such as a telephone appointment maker will answer the phone on the speaker's side.

[0046] [Example conversation 2] In the conversation example 2, initially, a person B who is not the intended call recipient answers the phone at the receiver's terminal. The receiver's voice acquired in step St12 includes the voice "Hello. This is XX Co., Ltd." Since the receiver's voice does not satisfy either (Condition 1) or (Condition 2) described above, the process transitions from step St13 to step St14. That is, the call system 1 answers the phone with the person B who is not the intended call recipient. For example, the speech generation unit 103 generates a speech such as "Thank you for your help. Is Mr. A, the sales manager, here?" The speech unit 104 transmits the generated speech to the receiver's terminal.

[0047] Person B, who is not the intended caller, says into the phone, "A, right? I'll take over, so please wait a moment," and switches the phone to hold mode. Then, the receiver's voice acquired next in step St12 satisfies the above-mentioned (Condition 1) and (Condition 2), so the process transitions from step St13 to step St16. The speaker switching unit 105 switches the input channel of the spoken voice to be transmitted to the receiver's terminal to the user of the speaker's terminal. In other words, at the time when person B, who is not the intended caller, puts the phone into hold mode, the subject that handles the call on the speaker's side switches from the call system 1 to a human user such as a telephone appointment maker.

[0048] As described above, each embodiment of the present application solves one or more deficiencies. Note that the effects of each embodiment are non-limiting effects or examples of effects.

[0049] In each of the above-mentioned embodiments, the user terminal 20 and the server 10 execute the above-mentioned various processes according to various control programs (e.g., a call program) stored in a storage device provided in the user terminal 20 and the server 10. Also, other computers, not limited to the user terminal 20 and the server 10, may execute the above-mentioned various processes according to various control programs (e.g., a call program) stored in a storage device provided in the user terminal 20 and the server 10.

[0050] Furthermore, the configuration of the call system 1 is not limited to the configuration described as an example of the embodiment above. For example, the server may execute part or all of the processes described as processes executed by the user terminal, or the user terminal may execute part or all of the processes described as processes executed by the server. Also, the user terminal may be equipped with part or all of the storage unit (storage device) equipped in the server. In other words, the user terminal or the server in the call system 1 may be equipped with part or all of the functions equipped in the other one.

[0051] Furthermore, the program may be configured to realize some or all of the functions described as examples of each of the above-mentioned embodiments in a standalone device that does not include a communication network.

[0052] [Note] The above-mentioned embodiments have been described so as to enable at least one person having ordinary skill in the art to which the invention pertains to practice the invention.

[0053] [1] The processor: A call function for making a call to a callee terminal; A listener voice acquisition function for acquiring a listener voice input to the listener side terminal; a speech generation function for generating a speech to be transmitted to the listener terminal based on the contents of the listener voice; A speech function for transmitting the speech to the receiver terminal; a speaker switching function for switching an input channel of a speech voice to be transmitted to the receiver terminal to a user of the speaker terminal when the receiver voice satisfies a predetermined condition; A phone call program that makes this possible.

[0054] According to the above-mentioned calling program, it is possible to increase the efficiency of calling a predetermined call recipient.

[0055] [2] The predetermined condition is It is possible to determine that the person inputting the receiver's voice is the person to whom the call is to be made, [1] The telephone call program described in. This allows the caller to be switched from a call system to a human being when the intended call recipient answers the phone.

[0056] [3] The predetermined condition is It is possible to estimate that the input person of the receiver's voice changes from a person who is not the call target to a call target, [1] The telephone call program described in.

[0057] [4] The predetermined condition is The listener voice includes a hold tone. [3] The telephone call program described in.

[0058] According to these calling programs, if a person other than the intended call recipient answers the phone first, the call recipient can be switched from the calling system to a human at the same time that the call recipient is replaced by the call recipient.

[0059] [5] A calling system comprising one or more processors, The processor, A call function for making a call to a callee terminal; A listener voice acquisition function for acquiring a listener voice input to the listener side terminal; a speech generation function for generating a speech to be transmitted to the listener terminal based on the contents of the listener voice; A speech function for transmitting the speech to the receiver terminal; a speaker switching function for switching an input channel of a speech voice to be transmitted to the receiver terminal to a user of the speaker terminal when the receiver voice satisfies a predetermined condition; A call system that makes this possible.

[0060] According to the above-mentioned calling system, it is possible to increase the efficiency of calling a predetermined call recipient.

[0061] [6] A calling method by a device including a processor, comprising: A calling step of calling a recipient terminal to which a call is to be made; a listener voice acquisition step of acquiring a listener voice input to the listener side terminal; a speech generation step of generating a speech to be transmitted to the listener terminal based on the contents of the listener voice; a speaking step of transmitting the uttered voice to the listener terminal; a speaker switching step of switching an input channel of an utterance voice to be transmitted to the listener terminal to a user of the speaker terminal when the listener voice satisfies a predetermined condition; A calling method comprising the steps of:

[0062] According to the above-mentioned calling method, it is possible to increase the efficiency of calling a predetermined call recipient. [Industrial Applicability]

[0063] INDUSTRIAL APPLICABILITY According to one embodiment of the present invention, it is useful as a calling program, a calling system, and a calling method for improving the efficiency of calling a predetermined call recipient. [Explanation of symbols]

[0064] 1. Telephone system 10 Server 11 Processors 12. Memory 13 Storage device 20, 20A, 20B User terminal 21 Processors 22 Memory 23 Storage device 30 Communication Network 101 Calling Part 102 Listener voice acquisition unit 103 Speech generation unit 104 Speech section 105 Speaker switching unit

Claims

1. A call program for telemarketing, comprising: The processor: A call function for making a call to a callee terminal; A listener voice acquisition function for acquiring a listener voice input to the listener side terminal; a speech generation function for generating a speech to be transmitted to the listener terminal based on the contents of the listener voice; A speech function for transmitting the speech to the receiver terminal; a speaker switching function for switching an input channel of a speech voice to be transmitted to the receiver terminal to a user of the speaker terminal when the receiver voice satisfies a predetermined condition; Realize this, The predetermined condition is It is possible to determine that the person inputting the receiver's voice is the person to whom the call is to be made, Call program.

2. A call program for telemarketing, comprising: The processor: A call function for making a call to a callee terminal; A listener voice acquisition function for acquiring a listener voice input to the listener side terminal; a speech generation function for generating a speech to be transmitted to the listener terminal based on the contents of the listener voice; A speech function for transmitting the speech to the receiver terminal; a speaker switching function for switching an input channel of a speech voice to be transmitted to the receiver terminal to a user of the speaker terminal when the receiver voice satisfies a predetermined condition; Realize this, The predetermined condition is It is possible to estimate that the input person of the receiver's voice changes from a person who is not the call target to a call target, Call program.

3. The predetermined condition is The listener voice includes a hold tone.

3. The calling program according to claim 2.

4. A call system for telemarketing comprising one or more processors, The processor, A call function for making a call to a callee terminal; A listener voice acquisition function for acquiring a listener voice input to the listener side terminal; a speech generation function for generating a speech to be transmitted to the listener terminal based on the contents of the listener voice; A speech function for transmitting the speech to the receiver terminal; a speaker switching function for switching an input channel of a speech voice to be transmitted to the receiver terminal to a user of the speaker terminal when the receiver voice satisfies a predetermined condition; Realize this, The predetermined condition is It is possible to determine that the person inputting the receiver's voice is the person to whom the call is to be made, Telephone system.

5. A call system for telemarketing, comprising one or more processors, The processor, A call function for making a call to a callee terminal; A listener voice acquisition function for acquiring a listener voice input to the listener side terminal; a speech generation function for generating a speech to be transmitted to the listener terminal based on the contents of the listener voice; A speech function for transmitting the speech to the receiver terminal; a speaker switching function for switching an input channel of a speech voice to be transmitted to the receiver terminal to a user of the speaker terminal when the receiver voice satisfies a predetermined condition; Realize this, The predetermined condition is It is possible to estimate that the input person of the receiver's voice changes from a person who is not the call target to a call target, Telephone system.

6. The predetermined condition is The listener voice includes a hold tone. The calling system according to claim 5.

7. A method for making a call for telemarketing by an apparatus including a processor, comprising: A calling step of calling a recipient terminal to which a call is to be made; a listener voice acquisition step of acquiring a listener voice input to the listener side terminal; a speech generation step of generating a speech to be transmitted to the listener terminal based on the contents of the listener voice; a speaking step of transmitting the uttered voice to the listener terminal; a speaker switching step of switching an input channel of an utterance voice to be transmitted to the listener terminal to a user of the speaker terminal when the listener voice satisfies a predetermined condition; having The predetermined condition is It is possible to determine that the person inputting the receiver's voice is the person to whom the call is to be made, Call method.

8. A method for making a call for telemarketing by an apparatus having a processor, comprising: A calling step of calling a recipient terminal to which a call is to be made; a listener voice acquisition step of acquiring a listener voice input to the listener side terminal; a speech generation step of generating a speech to be transmitted to the listener terminal based on the contents of the listener voice; a speaking step of transmitting the uttered voice to the listener terminal; a speaker switching step of switching an input channel of an utterance voice to be transmitted to the listener terminal to a user of the speaker terminal when the listener voice satisfies a predetermined condition; having The predetermined condition is It is possible to estimate that the input person of the receiver's voice changes from a person who is not the call target to a call target, Call method.

9. The predetermined condition is The listener voice includes a hold tone. The calling method according to claim 8.

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