JP2017175272A - Communication control device, communication system, communication method, and computer program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a communication control device and the like capable of controlling to perform communication after gaining a relier's approval.SOLUTION: A communication control device 1 comprises: a storage unit 3 for storing access destination information to make a phone call to an access destination; and a control unit 2 that, on the basis of call incoming from a calling source to a first communication terminal connected with the communication control device, controls a phone call made to the access destination information stored in the storage unit 3 and first communication between a calling source second communication terminal and a third communication terminal, i.e. an access destination on the access destination information, and controls second communication between the first communication terminal and the second communication terminal by receiving information from the third communication terminal in the first communication.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a communication control device, a communication system, a communication method, and a computer program.

  As a measure for avoiding the damage caused by fraud using the telephone, it is important that the telephone receiver confirms the person with whom the call is made and the content of the call (hereinafter referred to as a trusted person). However, according to the wire fraud prevention system disclosed in Patent Document 1, the telephone recipient can talk to the other party even though he / she has not obtained approval from the trusted person. And since the fraudulent telephone cannot be disconnected unless the reliable person receives the information indicating that the incoming call has been received, there is a case where the telephone receiver is involved in fraud.

  Moreover, in patent document 1, since the terminal which a reliable person uses performs message transmission, the network environment was required.

  Here, as related technologies, for example, there are the following patent documents.

  Patent Document 2 discloses a system for calling a supporter's communication device when it is determined that the supporter should be called according to the state of the call after the start of the call.

  Patent Document 3 discloses a telephone that calls a third party at the time of an incoming call and performs a multi-party call.

  Patent Document 4 discloses a system in which an HGW (Home Gateway) inquires of a server that manages a black list whether an incoming telephone number is included in the black list.

JP 2012-182707 A JP 2007-159043 A JP 2012-169722 A Japanese Patent Laying-Open No. 2015-056841

  Similar to Patent Document 1, the system disclosed in Patent Document 2 makes a call without receiving confirmation from a supporter when an incoming call is received.

  Patent Document 3 does not consider a case where a third party cannot start a call.

  Patent Document 4 only confirms the black list and does not consider obtaining approval from a trustee.

  Therefore, the main object of the present invention is to provide a communication control device or the like that can be controlled to communicate after obtaining approval from a trusted person.

  In order to achieve the above object, a communication control apparatus according to an aspect of the present invention includes the following arrangement.

That is, the communication control apparatus according to one aspect of the present invention is
Storage means for storing access destination information for communication to the access destination;
Based on the incoming call from the transmission source to the first communication terminal connected to the own device, the transmission to the access destination information stored in the storage means, the access to the second communication terminal of the transmission source and the access destination information By controlling the first communication with the third communication terminal, and receiving the information from the third communication terminal in the first communication, the first communication terminal and the third communication terminal Control means for controlling the second communication with the second communication terminal.

A communication system according to an aspect of the present invention that achieves the same object is as follows.
The first communication terminal;
The third communication terminal;
Including the communication control device.

A communication method according to an aspect of the present invention that achieves the same object is as follows.
Based on the incoming call from the transmission source to the first communication terminal connected to the own device, the transmission to the access destination information for communication to the access destination stored in the storage means, and the second communication terminal of the transmission source And the first communication between the third communication terminal that is the access destination of the access destination information and receiving information from the third communication terminal in the first communication, The second communication between the first communication terminal and the second communication terminal is controlled.

  Further, the object is to provide a computer program for realizing the communication control device, the communication system, or the communication method having the above-described configuration by a computer, and a computer-readable storage medium storing the computer program. Is also achieved.

  According to the present invention described above, there is an effect that it is possible to control to communicate after obtaining the approval of the trustee.

It is a block diagram which shows the structure of the communication control apparatus which concerns on the 1st Embodiment of this invention. It is a block diagram which shows the structure of the communication system which concerns on the 2nd Embodiment of this invention. It is a flowchart explaining a process when there exists an incoming call in the home phone in the communication system which concerns on the 2nd Embodiment of this invention. It is a sequence diagram explaining a process when there exists an incoming call in the home phone in the communication system which concerns on the 2nd Embodiment of this invention. It is a figure which illustrates the permission list | wrist and a trusted person list | wrist in the communication system which concerns on the 2nd Embodiment of this invention. It is a flowchart explaining the process in the case of transmitting from the home phone in the communication system which concerns on the 3rd Embodiment of this invention. It is a sequence diagram explaining the process in the case of making a call from the home phone in the communication system according to the third embodiment of the present invention. It is a figure which illustrates illustartively the hardware constitutions of the computer (information processing apparatus) which can implement | achieve the 1st thru | or 3rd embodiment of this invention.

  Next, embodiments of the present invention will be described in detail with reference to the drawings.

<First Embodiment>
FIG. 1 is a block diagram showing a configuration of a communication control apparatus according to the first embodiment of the present invention.

  The communication control apparatus 1 according to the present embodiment includes a control unit 2 and a storage unit 3.

  The storage unit 3 stores access destination information for communication with the access destination.

  Based on the incoming call from the transmission source to the first communication terminal connected to the communication control device 1, the control unit 2 transmits the access destination information stored in the storage unit 3, and the second communication terminal of the transmission source And the first communication with the third communication terminal that is the access destination of the access destination information. Then, the control unit 2 controls the second communication between the first communication terminal and the second communication terminal by receiving information from the third communication terminal in the first communication.

  For example, when the control unit 2 detects an incoming call from the second communication terminal that is a transmission source with respect to the first communication terminal, the control unit 2 reads the access destination information stored in the storage unit 3 and performs the third communication of the access destination. You may instruct | indicate to the communication circuit which is not shown in figure to transmit to a terminal. The access destination information may be a telephone number, mail address information, or other identification information.

  In addition, when the control unit 2 detects an incoming call from the second communication terminal as the caller, the control unit 2 detects the caller information of the caller from the incoming call information, and the caller information is stored in advance in a memory (not shown). It may be determined whether the information is present. As a result of the determination, if the information is stored in advance in the memory, communication between the first communication terminal that receives the incoming call and the second communication terminal that is the caller may be permitted. As a result of the above determination, if the transmission source information is information that is not stored in the memory in advance, the control unit 2 transmits the access destination information stored in the storage unit 3 to the third communication terminal and the first communication terminal information. Control communication.

  Further, in the first communication, as a result of communication between the second communication terminal as the transmission source and the user of the third communication terminal, it represents that the user of the third communication terminal approves the incoming call. When the information is sent to the control unit 2, the control unit 2 receives the information indicating that fact so that the communication is performed between the first communication terminal and the second communication terminal of the transmission source. Communication may be controlled.

  In this case, in the first communication, if the user of the third communication terminal does not approve the incoming call as a result of the communication, the third communication terminal receives the first communication terminal of the destination and the second of the caller. Reject information for rejecting communication with the communication terminal may be transmitted. In this case, the control unit 2 may end the communication of the second communication terminal based on the rejection information.

  For example, when making a call from the first communication terminal to the fourth communication terminal, the control unit 2 makes a call to the third communication terminal and between the first communication terminal and the third communication terminal. Controlling the fourth communication between the first communication terminal and the fourth communication terminal by controlling the third communication and receiving information from the third communication terminal in the third communication. Good.

  As described above, the first embodiment has an effect that it can be controlled to communicate after obtaining the approval of the trustee.

  The reason is that the communication control apparatus 1 according to the present embodiment can realize the first communication in which the user of the third communication terminal, which is a trusted person, communicates with the second communication terminal that is the originator. This is because the sender can be confirmed by. As a result of the confirmation, when the communication control device 1 receives the information from the third communication terminal, the communication control device 1 performs the second communication between the first communication terminal of the destination and the second communication terminal of the transmission source. It is because it controls.

<Second Embodiment>
Next, a second embodiment based on the communication control apparatus according to the first embodiment described above will be described. FIG. 2 is a block diagram showing a configuration of a communication system according to the second embodiment of the present invention. However, the configuration shown in FIG. 2 is an example, and the present invention is not limited to the communication system shown in FIG.

  The communication system according to the present embodiment includes a home gateway (HGW) 10, a home phone 20, and a trusted phone 30.

  The HGW 10 is a device that performs control related to communication.

  The resident telephone 20 is a telephone used by a resident connected to the HGW 10.

  The trusted telephone 30 is a telephone used by a trusted person.

  The telephone network 40 is a network to which the HGW 10 and the trusted telephone 30 are connected.

  The HGW 10 includes a control unit 100, a storage unit 101, an operation unit 102, a telephone interface unit 103, and a telephone network interface unit 104.

  The control unit 100 performs overall control of the HGW 10.

  The storage unit 101 stores general HGW data. The storage unit 101 includes a permission list 1100, a trusted person list 1101, and guidance information 1102. The permission list 1100 stores telephone numbers that are referred to when an incoming call is received. The trusted person list 1101 stores telephone numbers of trusted persons registered in advance. Guidance information 1102 stores information representing guidance voices sent to the telephone.

  The operation unit 102 receives an operation by a user. For example, the operation unit 102 is a button or a WebGUI.

  The telephone interface unit 103 is a physical interface with the home phone 20.

  The telephone network interface unit 104 is a physical interface with the telephone network 40.

  The control unit 100 includes a storage control unit 1000, a telephone communication control unit 1001, an operation control unit 1002, and a permission determination unit 1003.

  The storage control unit 1000 performs writing to the storage unit 101 and reading from the storage unit 101.

  A telephone communication control unit 1001 controls telephone control such as outgoing call, incoming call, hold, and disconnection, guidance voice transmission, and telephone number detection.

  The operation control unit 1002 controls operations performed by the operation unit 102.

  The permission determination unit 1003 compares the permission list 1100 read by the storage control unit 1000 with the telephone number detected by the telephone communication control unit 1002 and notifies the telephone communication control unit 1002 of the comparison result.

  Next, with reference to FIG. 3 and FIG. 4, the operation when the home phone 20 receives an incoming call from an outside line will be described. FIG. 3 is a flowchart for explaining the processing when there is an incoming call to the home phone 20 in the communication system according to the second embodiment of the present invention. In FIG. 3, the portion described as (HGW) indicates the operation of the HGW 10, the portion described as (at home) indicates the operation of the home phone 20 and the portion described as (trust) indicates the trusted phone. 30 operations are shown. FIG. 4 is a sequence diagram for explaining processing when an incoming call is received by the home phone 20 in the communication system according to the second embodiment of the present invention.

  First, the HGW 10 receives an incoming call and obtains the telephone number of the called party that is the caller (step S100). That is, when the telephone communication control unit 1001 detects an incoming packet from the telephone network 40 via the telephone network interface unit 104, the HGW 10 acquires the telephone number of the called party (source telephone) from the incoming packet (step S200). .

  The permission determination unit 1003 of the HGW 10 checks whether the acquired telephone number is present in the permission list 1100 (step S101).

  If it exists, the telephone communication control unit 1001 of the HGW 10 determines that the incoming call does not correspond to a fraudulent call, and makes a normal incoming call to the home phone 20 (step S102). That is, the HGW 10 sends a RINGER to the home phone 20 (step S201).

  If it does not exist, the telephone communication control unit 1001 of the HGW 10 starts an operation of confirming the incoming telephone number. First, the telephone communication control unit 1001 of the HGW 10 makes an incoming call to the home phone 20. When the resident is off-hook (OFF-Hook) (step S202), the permission determination unit 1003 of the HGW 10 has already determined that the received telephone number does not exist in the permission list 1100. Guidance for confirmation is sent out (step S103, step S203). As for the guidance, the storage control unit 1000 accesses the guidance information 1102, and the acquired guidance information is sent from the telephone communication control unit 1001 to the home phone 20. Next, the telephone communication control unit 1001 of the HGW 10 establishes a session with the called party, sends a guidance to start the work of confirming the called party to the called party, and puts it on hold (steps S104 and S204). Step S205). Next, the telephone communication control unit 1001 of the HGW 10 makes a call to the trusted telephone 30 while maintaining a session with the called party (step S105, step S206), and makes an incoming call to the trusted person (step S106).

  If the trusted person does not go off-hook (“NO” in step S107), the telephone communication control unit 1001 of the HGW 10 transmits a guidance indicating that the trusted person's approval has not been obtained to the called party and the person at home. Is cut (step S109).

  When the trusted person goes off-hook (“YES” in step S107, step S207), the telephone communication control unit 1001 of the HGW 10 sends a guidance indicating that there is an incoming call from a telephone number that does not exist in the permission list 1100 (step S208). . Then, the telephone communication control unit 1001 of the HGW 10 cancels the hold state of the called party (step S209), and starts a call between the trusted person and the called party (steps S108 and S210).

  As a result of the call between the called party and the trusted person, when the trusted person determines that the called party cannot be trusted and rejects the call between the home person and the called party, the trusted person performs a dial operation from the trusted phone 30 (for example, Call rejection is notified to the HGW 10 by pushing the second dial ("NO" in step S110). When the telephone communication control unit 1001 detects call rejection, the HGW 10 disconnects the call with the trusted person and the call with the receiving party (step S111). Then, the telephone communication control unit 1001 of the HGW 10 sends guidance indicating that the call is rejected by the trusted person to the home phone 20 that has been put on hold, and ends the process (step S109).

  On the other hand, when the trustee determines that the called party can be trusted and approves the call between the home person and the called party, the trusted person performs a dial operation (for example, pushes the first dial) from the trusted phone 30. By doing so, the call approval is notified to the HGW 10 (“YES” in step S110, step S211). The telephone communication control unit 1001 of the HGW 10 notified of the call approval disconnects the call with the trusted person (step S212). Then, the telephone communication control unit 1001 of the HGW 10 sends the guidance to start the call because the trustee's approval has been obtained for the home person and the receiving party (steps S112 and S213). And a call with the other party is started (step S113, step S215). When the call is approved, the storage control unit 1000 of the HGW 10 registers the telephone number of the called party in the permission list 1100 (Steps S112 and S214). In this way, the telephone number approved by the trustee is registered in the permission list 1100 without requiring any special operation.

  FIG. 5 is a diagram illustrating a permission list and a trusted person list in the communication system according to the second embodiment of the present invention.

  As a method of registering the phone number of the trusted person in the trusted person list 1101, for example, there are a method in which the user uses the Web GUI of the operation unit 102 and a method by dial push from the home phone 20. In the method using the Web GUI, the operation control unit 1002 issues a setting write request, and the storage control unit 1000 accesses and registers the trusted party list 1101. As a dial push method, a setting write request can be made by a dial detected by the telephone communication control unit 1001.

  In addition, the number of retries when the trusted person does not go off-hook can be set by the same method.

  In the trustee list 1101, when information of a plurality of trustees is registered together with priorities, the HGW 10 transmits to all registered numbers in order of priority or whether to transmit in advance to the number of persons to be transmitted in order of priority. It is also possible to select.

  As described above, the second embodiment has an effect that it can be controlled to make a call after obtaining the approval of the trustee.

  The reason is that the communication system according to the present embodiment controls the HGW 10 so as not to connect to a home person unless a trusted person answers the telephone and performs approval.

  For this reason, even if a phone call is made for the purpose of fraud, it does not lead to the home resident, and the home resident does not suffer from the fraud damage.

  Furthermore, the trustee does not need a network environment for data communication, and can respond by an analog telephone. For this reason, the trustee does not need a dedicated HGW and can easily introduce it.

<Third Embodiment>
Next, a third embodiment based on the communication system according to the second embodiment described above will be described.

  In this embodiment, when calling from the home phone 20 to a telephone number of a destination telephone that does not exist in the permission list 1100, the telephone communication control unit 1001 of the HGW 10 first calls the trusted person, and the trusted person sets the purpose of the call. Control to confirm. Then, the telephone communication control unit 1001 of the HGW 10 can make a call from the home phone 20 when the trusted person permits the home call.

  With reference to FIG. 6 and FIG. 7, the operation | movement at the time of making a call from a home phone is demonstrated. FIG. 6 is a flowchart for explaining processing in the case of making a call from a telephone in a communication system according to the third embodiment of the present invention. In FIG. 6, the location described as (HGW) indicates the operation of the HGW 10, the location described as (at home) indicates the operation of the home phone 20, and the location described as (trusted) indicates the trusted phone. 30 operations are shown. FIG. 7 is a sequence diagram for explaining processing in the case of making a call from a telephone in a communication system according to the third embodiment of the present invention.

  First, when making a call from the home phone 20 (steps S300 and S400), the permission determination unit 1003 of the HGW 10 refers to the permission list 1100 and confirms whether the destination telephone number is registered in the permission list 1100 ( Step S301).

  When the destination telephone number is registered in the permission list 1100, the telephone communication control unit 1001 of the HGW 10 performs a normal call (step S302).

  If the destination telephone number is not registered in the permission list 1100, the telephone communication control unit 1001 of the HGW 10 sends guidance to the home phone 20 that it is not registered in the permission list 1100 (step S401). A call is made to the person's telephone 30 (steps S303 and S402), and an incoming call is made to the trusted person (step S304).

  If the trusted person does not go off-hook (“NO” in step S305), the telephone communication control unit 1001 of the HGW 10 disconnects the call (step S310) and gives guidance to the home phone 20 that the trusted person cannot be approved. The call is disconnected and the call with the home phone 20 is disconnected (step S311).

  If the trusted person goes off-hook ("YES" in step S305, step S403), after sending guidance to the telephone number not registered in the permission list 1100 to the trusted telephone 30 (step S404), The telephone communication control unit 1001 of the HGW 10 starts a call between the trusted person and the person at home. Then, the trustee confirms the call partner and the call contents (step S306), and the trustee determines whether to approve the call to the destination telephone number (step S307).

  If the trusted person approves the call as a result of the call with the at-home person (“YES” in step S307), the trusted person pushes, for example, the first dial on the trusted telephone 30 during the call with the at-home person (step S307). S405). When the telephone communication control unit 1001 of the HGW 10 detects a dial push, the telephone communication control unit 1001 performs a disconnection operation to the trusted telephone 30 and registers the destination telephone number in the permission list 1100 (step S308). The telephone communication control unit 1001 of the HGW 10 sends a guidance for approving the call (step S407), and makes a normal call to the telephone number of the call destination telephone (step S309, step S408).

  If the call is rejected (“NO” in step S307), the trustee pushes the second dial of the trustee telephone 30 during the call with the person at home. When the telephone communication control unit 1001 of the HGW 10 detects a dial push, the telephone communication control unit 1001 performs a disconnection operation to the trusted telephone 30 (steps S310 and S406), sends guidance to the home telephone 20 to reject the call, and performs processing. The process ends (step S311). If the call is disconnected without detecting the dial push from the trusted telephone 30, the call is considered to be rejected, and after the guidance to reject the call is sent to the home telephone 20, the process is terminated.

  However, for example, emergency numbers such as 110 and 119 can be transmitted normally without asking a trustee for approval.

  As described above, the third embodiment has an effect that, even when a home person makes a call, control can be performed so as to make a call after obtaining the approval of the trustee.

  The reason is that the communication system according to the present embodiment controls in the HGW 10 so that a home person cannot make a call unless a trusted person answers the call and approves it.

(Hardware configuration)
In the embodiment described above, each unit illustrated in FIGS. 1 and 2 may be practiced by a dedicated device, but can be regarded as a function (processing) unit (software module) of a software program. However, various configurations can be envisaged when mounting each part shown in these drawings. An example of the hardware environment in such a case will be described with reference to FIG.

  FIG. 8 is a diagram illustrating an exemplary hardware configuration of a computer (information processing apparatus) capable of implementing the first to third embodiments of the present invention. That is, FIG. 8 shows a configuration of a computer (information processing apparatus) capable of realizing the communication control apparatus 1 shown in FIG. 1 and the whole or part of the communication system shown in FIG. Represents a hardware environment that can implement the function.

The information processing apparatus 9000 illustrated in FIG. 8 includes the following apparatuses, and has a configuration in which these are connected via a bus 9007.
CPU (Central Processing Unit) 9001
-Display 9002,
・ Communication interface (I / F) 9003,
・ ROM (Read Only Memory) 9004,
A RAM (Random Access Memory) 9005 and a hard disk device (HD) 9006.

  The hard disk device (HD) 9006 stores a program group 9006A and various kinds of stored information 9006B. The program group 9006A is, for example, a computer program for realizing a function corresponding to each block (each unit) of the communication control device 1 shown in FIG. 1 and the communication system shown in FIG. The various storage information 9006B is, for example, the storage unit 3 illustrated in FIG. 1 and the storage unit 101 illustrated in FIG. A communication interface 9003 is a general communication unit that realizes communication with an external device via the network 9100.

  In the information processing apparatus 9000, the CPU 9001 of the hardware executes a computer program capable of realizing the functions of the block diagram or the flowchart referred to in the description of the above-described embodiment. That is, the CPU 9001 executes the computer program using the hardware resources of the information processing apparatus 9000 shown in FIG. 8 to achieve the functions of the embodiment of the present invention. Specifically, when the communication system shown in FIG. 2 is realized by the information processing device 9000, the information processing device 9000 stores a computer program for executing the processing steps of the flowcharts shown in FIGS. Can be executed. The computer program supplied to the information processing apparatus 9000 may be stored in a readable / writable RAM 9005 or a non-volatile storage device (storage medium) such as the hard disk device 9006.

  In the above-described case, a general procedure can be adopted as a method for supplying a computer program into the apparatus. The supply method includes, for example, a method of installing in the apparatus via various storage media such as a CD-ROM, and a method of downloading from the outside via a network 9100 such as the Internet. In such a case, the embodiment of the present invention can be regarded as being configured by a code constituting the computer program or a computer-readable storage medium in which the code is recorded.

  While the present invention has been described with reference to the embodiments, the present invention is not limited to the above embodiments. Various changes that can be understood by those skilled in the art can be made to the configuration and details of the present invention within the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Communication control apparatus 2 Control part 3 Memory | storage part 10 HGW
DESCRIPTION OF SYMBOLS 20 Home phone 30 Reliable telephone 40 Telephone network 100 Control part 101 Storage part 102 Operation part 103 Telephone interface part 104 Telephone network interface part 1000 Storage control part 1001 Telephone communication control part 1002 Operation control part 1003 Permission judgment part 1100 Permission list 1101 Trusted person list 1102 Guidance information 9000 Information processing device (computer)
9001 CPU
9002 Display 9003 Communication interface (I / F)
9004 ROM
9005 RAM
9006 Hard disk device (HD)
9006A Program group 9006B Various stored information 9007 Bus 9100 Network

Claims (10)

Storage means for storing access destination information for communication to the access destination;
Based on the incoming call from the transmission source to the first communication terminal connected to the own device, the transmission to the access destination information stored in the storage means, the access to the second communication terminal of the transmission source and the access destination information By controlling the first communication with the third communication terminal, and receiving the information from the third communication terminal in the first communication, the first communication terminal and the third communication terminal A communication control apparatus comprising: control means for controlling second communication with the second communication terminal. The storage means further comprises a list including telephone numbers that allow incoming calls,
The communication control device according to claim 1, wherein the control means makes a call to the third communication terminal when there is an incoming call from a telephone number other than the telephone number in the list. When making a call from the first communication terminal to the fourth communication terminal, the control means makes a call to the third communication terminal and sends between the first communication terminal and the third communication terminal. And controlling the fourth communication between the first communication terminal and the fourth communication terminal by receiving information from the third communication terminal in the third communication. The communication control device according to claim 1 or 2. The first communication terminal;
The third communication terminal;
A communication system including the communication control device according to any one of claims 1 to 3. Based on the incoming call from the transmission source to the first communication terminal connected to the own device, the transmission to the access destination information for communication to the access destination stored in the storage means, and the second communication terminal of the transmission source And the first communication between the third communication terminal that is the access destination of the access destination information and receiving information from the third communication terminal in the first communication, A communication method for controlling second communication between a first communication terminal and the second communication terminal. The storage means further comprises a list including telephone numbers that allow incoming calls,
6. The communication method according to claim 5, wherein a call is made to the third communication terminal when an incoming call is received from a telephone number other than the telephone number in the list. When making a call from the first communication terminal to the fourth communication terminal, a third communication is made between the first communication terminal and the third communication terminal by making a call to the third communication terminal. And controlling the fourth communication between the first communication terminal and the fourth communication terminal by receiving information from the third communication terminal in the third communication. 6. The communication method according to 6. Based on the incoming call from the transmission source to the first communication terminal connected to the own device, the transmission to the access destination information for communication to the access destination stored in the storage means, and the second communication terminal of the transmission source And the first communication between the third communication terminal that is the access destination of the access destination information and receiving information from the third communication terminal in the first communication, A computer program for causing a computer to realize a control function for controlling second communication between a first communication terminal and the second communication terminal. The storage means further comprises a list including telephone numbers that allow incoming calls,
9. The computer program according to claim 8, which causes a computer to realize a control function of making a call to the third communication terminal when there is an incoming call from a telephone number other than the telephone number in the list. When making a call from the first communication terminal to the fourth communication terminal, a third communication is made between the first communication terminal and the third communication terminal by making a call to the third communication terminal. A control function for controlling the fourth communication between the first communication terminal and the fourth communication terminal by receiving information from the third communication terminal in the third communication. The computer program according to claim 8 or 9, which is realized by a computer.

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