JP2013201611A - Telephone, communication system, and communication method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a telephone capable of telling a user an urgent matter, while avoiding a trouble.SOLUTION: In a mobile phone 20, a transmission/reception part 1 receives an incoming signal including transmission source telephone number information which shows an external mobile phone 22 and a permission transfer signal indicating that voice telephone communication with the external mobile phone 22 is permitted. A storage part 4 stores a plurality of pieces of communication destination telephone number information which identifies each of the plurality of phones which include a transfer destination mobile phone 21. A control part 7, when the transmission/reception part 1 receives an incoming signal, permits the voice telephone communication with the external mobile phone 22 when transmission source telephone number information included in the incoming signal is stored in the storage part 4 as the transmission destination telephone number information. When the transmission source telephone number information is not stored in the storage part 4 as the transmission destination telephone number information, the control part 7 notifies the transfer destination mobile phone 21 of the transmission source telephone number information, and permits the voice telephone communication with the external mobile phone 22 when the transmission/reception part 1 receives the permission transfer signal.

Description

  The present invention relates to a telephone having a transfer function.

  In recent years, many children and elderly people have mobile phones. When a child or an elderly person has a mobile phone, there is a possibility that the child or the elderly may be involved in a trouble such as an incident due to a call from an unfavorable person.

  On the other hand, Patent Documents 1 and 2 disclose techniques for rejecting incoming calls from a caller registered in advance in a mobile phone.

  Patent Document 1 discloses a portable terminal that rejects incoming mail when the mail address of the mail sender is registered in advance. In addition, the mobile terminal described in Patent Document 1 notifies the sender's mail address to another mobile terminal used by a guardian or the like even when the sender's mail address of the mail is not registered in advance. Depending on the response from the other mobile terminal, the incoming call from the mail address of the caller is rejected.

  Patent Document 2 discloses a voice communication terminal that rejects an incoming voice call when the telephone number of the incoming caller of the voice call is registered in advance and the user is at a predetermined location. Yes.

  According to the technologies described in Patent Documents 1 and 2, when the telephone number information of the mobile phone that is the origin of the voice call is registered in advance, the mobile phone rejects the incoming voice call and sends the incoming voice call. Even when the original phone number information is not registered in advance, the phone number of the caller is notified to another mobile phone used by a guardian or the like, and depending on the response from the other mobile phone, It is possible to reject incoming calls from the telephone.

JP 2007-293397 A JP 2007-033691 A

  However, in the technologies described in Patent Documents 1 and 2, even if there is an incoming call that conveys urgent requirements from a mobile phone with a telephone number registered in advance, the mobile phone rejects the incoming call. There is a problem that requirements cannot be communicated to users.

  An object of the present invention is to provide a telephone set, a communication system, and a communication method capable of notifying a trouble and transmitting an urgent requirement to a user.

  The mobile phone according to the present invention includes a communication unit that receives an incoming signal including caller telephone number information indicating a caller telephone and a permission signal for permitting communication with the caller telephone. A storage unit for storing a plurality of communication destination telephone number information for identifying each of a plurality of telephones including a transfer destination telephone, and a caller telephone number information included in the incoming call signal when the communication unit receives the incoming call signal Is stored in the storage unit as the destination telephone number information, communication with the source telephone is permitted, and the source telephone number information is stored in the storage unit as the destination telephone number information. If not, the control unit is configured to notify the caller telephone number information to the transfer destination telephone and permit the communication with the caller telephone when the communication unit receives the permission signal.

  The communication system of the present invention is a communication system having a telephone and a transfer destination telephone, wherein the telephone is an incoming signal including caller telephone number information indicating a caller telephone, and the caller telephone. A communication unit that receives a permission signal indicating that communication is permitted, a storage unit that stores a plurality of communication destination telephone number information that identifies each of a plurality of telephones including a transfer destination telephone, and the communication unit receives an incoming signal If the caller telephone number information included in the incoming call signal is stored in the storage unit as the communication destination telephone number information, communication with the caller telephone is permitted, and the caller telephone When the number information is not stored in the storage unit as the communication destination telephone number information, the caller telephone number information is notified to the transfer destination telephone, and when the communication unit receives the permission signal, A control unit that permits communication with the other telephone, wherein the forwarding telephone includes a receiving unit that receives the source telephone number information, and a display that displays the source telephone number information received by the receiving unit And an operation unit for performing a permitting operation for permitting communication between the caller telephone number information specified by the source phone number information and the permitting operation when the permitting operation is performed on the operation unit. A management unit for transmitting a signal to the telephone.

  The communication method according to the present invention is performed by a telephone having a communication unit that receives an incoming signal including information on a sender telephone number indicating a sender telephone and a permission signal for permitting communication with the sender telephone. A storage step of storing a plurality of communication destination telephone number information for specifying each of a plurality of telephones including a predetermined transfer destination telephone, and when the communication unit receives an incoming signal, When the source telephone number information included in the incoming signal is stored in the storage step as the destination telephone number information, communication with the source telephone is permitted, and the source telephone number information is the communication destination. If it is not stored in the storage step as telephone number information, the caller telephone number information is notified to the transfer destination telephone, and when the communication unit receives the permission signal, And a control step of permitting communication with the story machine.

  The present invention can convey urgent requirements to the user while avoiding trouble.

It is a block diagram which shows the communication system of one Embodiment of this invention. It is a figure which shows an example of a structure of the mobile telephone of one Embodiment of this invention. It is a figure which shows the structure of the transfer destination mobile telephone of one Embodiment of this invention. It is a flowchart which shows an example of operation | movement of the communication system of one Embodiment of this invention.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

  FIG. 1 is a block diagram showing a communication system 40 according to an embodiment of the present invention.

  The communication system 40 shown in FIG. 1 includes a mobile phone 20 and a transfer destination mobile phone 21.

  The communication system 40 communicates with an external mobile phone 22, which is an external mobile phone, via a mobile phone communication network 23.

  The mobile phone 20 communicates with the transfer destination mobile phone 21 and the external mobile phone 22 via the mobile phone communication network 23. The cellular phone 20 is operated by the receiver 30. As the receiver 30, a child or an elderly person is assumed.

  The transfer destination mobile phone 21 communicates with the mobile phone 20 and the external mobile phone 22 via the mobile phone communication network 23. The transfer destination mobile phone 21 is operated by the receiver 31. As the receiver 31, a guardian of the receiver 30 is assumed.

  The external mobile phone 22 communicates with the mobile phone 20 and the transfer destination mobile phone 21 via the mobile phone communication network 23. External mobile phone 22 is operated by caller 32.

  FIG. 2 is a diagram illustrating an example of the configuration of the mobile phone 20.

  A mobile phone 20 shown in FIG. 2 includes a transmission / reception unit 1, a transmission / reception antenna 2, an operation unit 3, a storage unit 4, a calling unit 5, a display unit 6, and a control unit 7.

  The transmission / reception unit 1 receives an incoming signal from the external mobile phone 22 via the transmission / reception antenna 2, and receives a permission transfer signal from the transfer destination mobile phone 21. The transmission / reception unit 1 is an example of a communication unit.

  The incoming signal is a signal transmitted by the external mobile phone 22 so that the external mobile phone 22 performs voice telephone communication with the mobile phone 20. Accordingly, the external mobile phone 22 is a telephone that is a source of incoming signals, and the mobile phone 20 is a telephone that is a destination of incoming signals. The incoming signal includes the telephone number information of the external mobile phone 22 as the caller telephone number information and the telephone number information of the mobile phone 20 as the callee telephone number information.

  The permission transfer signal is a permission signal for permitting the mobile phone 20 to perform voice telephone communication with the external mobile phone 22, and the incoming call signal transferred to the transfer destination mobile phone 21 which is a predetermined mobile phone is used. This is a signal transmitted by the transfer destination mobile phone 21 for transfer to the mobile phone 20 again. The permission transfer signal includes the phone number information of the transfer destination mobile phone 21 as transfer source phone number information, the phone number information of the mobile phone 20 as transfer destination phone number information, and the phone number information of the external mobile phone 22 as the call source. Included as phone number information.

  When a call connection operation for starting voice telephone communication with the external mobile phone 22 is performed from the receiver 30, the operation unit 3 transmits a call connection input signal indicating that the call connection operation has been performed. For example, the operation unit 3 is a key input device, and the input operation is pressing a predetermined key in the key input device.

  The storage unit 4 stores a telephone directory database having a plurality of communication destination telephone number information including predetermined communication destination telephone number information for specifying a predetermined telephone.

  The communication destination telephone number information is telephone number information of a mobile phone that the mobile phone 20 is permitted to perform voice telephone communication. The predetermined communication destination telephone number information is the telephone number information of the telephone set to which the incoming signal is transferred. In the present embodiment, it is assumed that the predetermined transfer destination telephone is the transfer destination mobile telephone 21.

  The calling unit 5 notifies the receiver 30 of various information. For example, the calling unit 5 is at least one of a speaker and a vibrator, and notifies various information by at least one of voice and vibration.

  The display unit 6 displays various information.

  When the transmission / reception unit 1 receives an incoming signal, the control unit 7 extracts caller telephone number information from the incoming signal.

  The control unit 7 compares the extracted caller telephone number information with each of the communication destination telephone number information in the telephone directory database stored in the storage unit 4, and the extracted caller telephone number information is the communication destination telephone number. It is determined whether or not the information is stored in the storage unit 4 as information.

  When the caller telephone number information is stored in the storage unit 4 as the communication destination telephone number information, the control unit 7 permits the voice telephone communication with the caller telephone, and allows the caller telephone number information to be permitted. Set in number information. The permitted telephone number information is the telephone number information of the permitted portable telephone that is permitted to perform voice telephone communication with the portable telephone 20.

  When the source telephone number information is not stored in the storage unit 4 as the communication destination telephone number information, the control unit 7 transmits / receives data to / from the transfer destination mobile phone 21 specified by the predetermined communication destination telephone number information in the telephone directory database. An inquiry transfer signal is transmitted via the unit 1.

  The inquiry transfer signal is a signal transmitted by the mobile phone 20 in order to transfer the incoming signal to the predetermined transfer destination mobile phone 21. The inquiry transfer signal includes the telephone number information of the mobile phone 20 as the transfer source telephone number information, the telephone number information of the transfer destination mobile phone 21 as the transfer destination telephone number information, and the external mobile phone 22 as the caller telephone number information. Including.

  When the transmission / reception unit 1 receives the permission transfer signal, the control unit 7 extracts the transfer source telephone number information and the transmission source telephone number information from the permission transfer signal.

  The control unit 7 collates the extracted transfer source telephone number information with the telephone number information of the transfer destination mobile phone 21 that is the predetermined communication destination telephone number information in the telephone directory database stored in the storage unit 4. When it is determined that the extracted transfer source telephone number information is the same as the predetermined communication destination telephone number information, the control unit 7 permits voice telephone communication with the caller telephone set, and sets the caller telephone number information as the permitted telephone number. Set to information. In the present embodiment, the extracted transfer source telephone number information is the telephone number information of the transfer destination mobile phone 21, and the predetermined communication destination phone number information is also the phone number information of the transfer destination mobile phone 21. It is determined that the extracted transfer source telephone number information is the same as the predetermined communication destination telephone number information.

  When the voice telephone communication with the permitted cellular phone is permitted, the control unit 7 uses the calling unit 5 to notify the incoming call from the permitted cellular phone and displays the permitted telephone number information on the display unit 6.

  When the control unit 7 receives the call connection input signal from the operation unit 3 after notifying the incoming call from the permitted mobile phone, the control unit 7 starts voice telephone communication with the permitted mobile phone.

  FIG. 3 is a diagram showing a configuration of the transfer destination mobile phone 21 according to the embodiment of the present invention.

  3 includes a transmission / reception unit 11, a transmission / reception antenna 12, an operation unit 13, a calling unit 15, a display unit 16, and a management unit 17.

  The transmission / reception unit 11 receives an inquiry transfer signal from the mobile phone 20 via the transmission / reception antenna 12. The transmission / reception unit 11 is an example of a reception unit.

  When the transfer connection operation for the transfer destination mobile phone 21 to start voice telephone communication with the external mobile phone 22 is performed from the receiver 31, the operation unit 13 performs a transfer connection input indicating that the transfer connection operation has been performed. Send a signal. For example, the operation unit 13 is a key input device including a plurality of keys, and the transfer connection operation is pressing of a transfer connection key among the plurality of keys.

  When the permission operation for allowing the mobile phone 20 to start voice telephone communication with the external mobile phone 22 from the receiver 31 is performed, the operation unit 13 receives a permission input signal indicating that the permission operation has been performed. Send. For example, the permission operation is pressing of a permission key among a plurality of keys of the operation unit 13.

  When a call disconnecting operation, which is an input operation for ending voice telephone communication with the external mobile phone 22 from the receiver 31, is performed, the operation unit 13 receives a call disconnecting input signal indicating that the call disconnecting operation has been performed. Send. For example, the call disconnecting operation is a press of a call disconnecting key among a plurality of keys of the operation unit 13.

  The calling unit 15 notifies the receiver 31 of various information. For example, the calling unit 15 is at least one of a speaker and a vibrator, and notifies various information by at least one of voice and vibration.

  The display unit 16 displays various information.

  When the transmission / reception unit 11 receives the inquiry transfer signal, the management unit 17 extracts the source telephone number information from the inquiry transfer signal. Then, using the calling unit 15, the management unit 17 notifies the arrival of the inquiry transfer signal and displays the caller telephone number information on the display unit 16.

  After notifying the arrival of the inquiry transfer signal, the management unit 17 starts voice telephone communication with the external mobile phone 22 when receiving the transfer connection input signal from the operation unit 13. Thereafter, when receiving the call disconnect input signal, the management unit 17 ends the voice telephone communication with the external mobile phone 22.

  In addition, after notifying the arrival of the inquiry transfer signal, when the management unit 17 receives the permission input signal from the operation unit 13, the management unit 17 transmits the permission transfer signal to the transmission / reception unit 11. Therefore, the permission transfer signal is a signal for transferring again the inquiry transfer signal, which is an incoming call signal transferred by the mobile phone 20 to a predetermined transfer destination phone, to the mobile phone 20.

  FIG. 4 is a flowchart showing an example of the operation of the communication system 40 according to the embodiment of the present invention.

  When the transmission / reception unit 1 receives an incoming signal from the external mobile phone 22 via the mobile phone communication network 23 and the transmission / reception antenna 2, the transmission / reception unit 1 demodulates the incoming signal and transmits the demodulated incoming signal to the control unit 7 (step S1). S101).

  The control unit 7 receives the incoming signal from the transmission / reception unit 1, and extracts the telephone number information of the external mobile phone 22 that is the telephone of the transmission source from the incoming signal as the transmission source telephone number information. The control unit 7 compares the extracted caller telephone number information with each of the communication destination telephone number information in the telephone directory database stored in the storage unit 4, and the extracted caller telephone number information is the communication destination telephone number. It is determined whether or not the information is stored in the storage unit 4 as information (step S102).

  If the extracted caller telephone number information is stored in the storage unit 4 as the communication destination telephone number information in step S102, the control unit 7 permits to perform voice telephone communication with the caller telephone, The original telephone number information is set as the permitted telephone number information (step S103).

  Then, the control unit 7 uses the calling unit 5 to notify the incoming call from the permitted mobile phone, and displays the caller telephone number information on the display unit 6 as the permitted telephone number information (step S104).

  Thereafter, the control unit 7 determines whether a call connection input signal has been received from the operation unit 3 (step S105).

  When the call connection input signal is not received from the operation unit 3, the control unit 7 returns to the process of step S105.

  When the control unit 7 receives a call connection input signal from the operation unit 3, the control unit 7 starts voice telephone communication with the external mobile phone 22 that is a caller phone as a permitted mobile phone (step S106).

  If the extracted source telephone number information is not stored in the storage unit 4 as the communication destination telephone number information in step S102, the control unit 7 uses the telephone number information of the mobile phone 20 as the incoming call signal. Set as information. Further, the control unit 7 acquires the predetermined communication destination telephone number information from the storage unit 4 and sets the predetermined communication destination telephone number as the transfer destination telephone number information of the inquiry transfer signal in the incoming signal. The control unit 7 transmits the incoming signal in which the transfer source telephone number information and the transfer destination telephone number information are set to the transmission / reception unit 1 as an inquiry transfer signal.

  When receiving the inquiry transfer signal from the control unit 7, the transmission / reception unit 1 modulates the inquiry transfer signal, and transmits the modulated inquiry transfer signal to the transfer destination mobile phone 21 via the mobile phone communication network 23. The transmission / reception unit 11 of the transfer destination mobile phone 21 receives the inquiry transfer signal via the transmission / reception antenna 12, demodulates the inquiry transfer signal, and transmits the demodulated inquiry transfer signal to the management unit 17 (step). S107).

  The management unit 17 receives the inquiry transfer signal from the transmission / reception unit 11, and from the inquiry transfer signal, the phone number information of the external mobile phone 22 as the caller telephone number information and the phone number of the mobile phone 20 as the transfer source phone number information. Extract information. The management unit 17 uses the calling unit 15 to notify the arrival of the inquiry transfer signal, and displays on the display unit 16 the caller telephone number information and the fact that the incoming signal has been transferred from the mobile phone 20 ( Step S108).

  And the management part 17 judges whether the transfer connection input signal was received from the operation part 13 (step S109).

  When the management unit 17 does not receive the transfer connection input signal from the operation unit 13, the management unit 17 returns to the process of step S109.

  When receiving the transfer connection input signal from the operation unit 13, the management unit 17 starts voice telephone communication with the external mobile phone 22 that is the caller telephone (step S <b> 110).

  Thereafter, the management unit 17 determines whether a permission input signal has been received from the operation unit 13 (step S111).

  If the permission input signal is not received from the operation unit 13 in step S111, the management unit 17 determines whether a call disconnection input signal is received from the operation unit 13 (step S112).

  If the call disconnection input signal is not received from the operation unit 13 in step S112, the management unit 17 returns to the process of step S111.

  In step S112, when receiving a call disconnection input signal from the operation unit 13, the management unit 17 ends the voice telephone communication with the external mobile phone 22 that is the caller telephone (step S113).

  In step S <b> 111, when the permission input signal is received from the operation unit 13, the management unit 17 changes the transfer source telephone number information of the incoming signal to the telephone number information of the transfer destination mobile phone 21. Further, the management unit 17 changes the transfer destination telephone number information of the incoming signal to the telephone number information of the mobile phone 20 that is the transfer source telephone number information of the extracted inquiry transfer signal. The management unit 17 transmits the incoming call signal in which the transfer source telephone number information and the transfer destination telephone number information are changed to the transmission / reception unit 11 as a permission transfer signal.

  The transmission / reception unit 11 receives the permission transfer signal from the management unit 17, modulates the permission transfer signal, and transmits the modulated permission transfer signal to the mobile phone via the transmission / reception antenna 12 and the mobile phone communication network 23. 20 (step S114).

  The transmission / reception unit 1 receives the permission transfer signal via the mobile phone communication network 23 and the transmission / reception antenna 2. The transmission / reception unit 1 demodulates the permission transfer signal and transmits the demodulated permission transfer signal to the control unit 7.

  The control unit 7 receives the permission transfer signal from the transmission / reception unit 1. The control unit 7 extracts the telephone number information of the transfer destination mobile telephone 21 as the transfer source telephone number information and the telephone number information of the external mobile telephone 22 as the transmission source telephone number information from the permission transfer signal. The control unit 7 collates the extracted transfer source telephone number information with predetermined communication destination telephone number information in the telephone directory database stored in the storage unit 4. The control unit 7 determines whether or not the extracted transfer source telephone number information is the same as the predetermined communication destination telephone number information. Since the extracted transfer source telephone number information is the same as the predetermined communication destination telephone number information, the control unit 7 permits voice telephone communication with the caller telephone set, and sets the caller telephone number information as permitted telephone number information. (Step S115).

  When the process of step S115 ends, the control unit 7 executes the process of step S104.

  As described above, according to the present embodiment, in the mobile phone 20, the transmitting / receiving unit 1 performs the incoming call signal including the caller telephone number information indicating the external mobile phone 22 and the voice phone communication with the external mobile phone 22. And a permission transfer signal indicating that permission is permitted. The storage unit 4 stores a plurality of communication destination telephone number information for specifying each of a plurality of telephones including the transfer destination mobile phone 21. When the transmission / reception unit 1 receives an incoming signal, the control unit 7 receives voice from the external mobile phone 22 when the source telephone number information included in the incoming signal is stored in the storage unit 4 as communication destination telephone number information. If telephone communication is permitted and the source telephone number information is not stored in the storage unit 4 as the communication destination telephone number information, the source telephone number information is notified to the transfer destination mobile phone 21 and the permission transfer signal is transmitted to the transmission / reception unit 1. , The voice telephone communication with the external mobile phone 22 is permitted.

  For this reason, even if the caller telephone number information of the external mobile phone 22 is not stored, the caller telephone number information is notified to the transfer destination mobile phone 21 and then the permission transfer signal is received. Voice telephone communication with 22 is permitted. Therefore, even if the caller telephone number information is not stored, in the case of an urgent requirement, voice telephone communication with the caller telephone is possible, so that the urgent requirement is avoided while avoiding trouble. It becomes possible to tell to.

  In the present embodiment, in the mobile phone 20, the control unit 7 notifies the transfer destination mobile phone 21 of the caller telephone number information by transferring the incoming signal to the transfer destination mobile phone 21.

  For this reason, since the transfer destination mobile phone 21 can perform voice telephone communication with the external mobile phone 22, the receiver 31 can more accurately determine whether or not the call is from an unfavorable person. Therefore, it is possible to further reduce the possibility that the receiver 30 is involved in trouble.

  In this embodiment, the permission transfer signal is an incoming call signal transferred from the transfer destination mobile phone 21.

  For this reason, since the mobile phone 20 can start voice telephone communication with the external mobile phone 22 immediately after receiving the permission transfer signal from the transfer destination mobile phone 21, the urgent requirement is notified to the receiver 30 earlier. It becomes possible.

  In the embodiment described above, the illustrated configuration is merely an example, and the present invention is not limited to the configuration.

  For example, in the above embodiment, a mobile phone has been described as an example of a telephone. However, the telephone is not limited to a mobile phone and may be a fixed telephone.

DESCRIPTION OF SYMBOLS 1, 11 Transmission / reception part 2, 12 Transmission / reception antenna 3, 13 Operation part 4 Memory | storage part 5, 15 Calling part 6, 16 Display part 7 Control part 17 Management part 20 Mobile telephone 21 Transfer destination mobile telephone 22 External mobile telephone 23 Mobile telephone Communication network 30 Receiver (children, elderly people)
31 Recipient (Guardian)
32 Caller 40 Communication System

Claims (5)

A communication unit that receives an incoming signal including caller telephone number information indicating a caller telephone, and a permission signal for permitting communication with the caller telephone;
A storage unit for storing a plurality of communication destination telephone number information for specifying each of a plurality of telephones including a predetermined transfer destination telephone;
When the communication unit receives an incoming signal, communication with the caller's telephone is permitted if the source telephone number information included in the incoming signal is stored in the storage unit as the destination telephone number information If the caller telephone number information is not stored in the storage unit as the communication destination telephone number information, the caller telephone number information is notified to the transfer destination telephone, and the permission signal is received by the communication unit. Then, the telephone which has a control part which permits communication with the said telephone of the transmission origin. The telephone set according to claim 1, wherein
The control unit is a telephone that notifies the call destination telephone number information to the transfer destination telephone by transferring the incoming signal to the transfer destination telephone. The telephone set according to claim 2,
The telephone, wherein the permission signal is the incoming signal transferred from the transfer destination telephone. A communication system having a telephone and a transfer destination telephone,
The telephone is
A communication unit that receives an incoming signal including caller telephone number information indicating a caller telephone, and a permission signal for permitting communication with the caller telephone;
A storage unit for storing a plurality of communication destination telephone number information for specifying each of a plurality of telephones including a transfer destination telephone;
When the communication unit receives an incoming signal, communication with the caller's telephone is permitted if the source telephone number information included in the incoming signal is stored in the storage unit as the destination telephone number information If the caller telephone number information is not stored in the storage unit as the communication destination telephone number information, the caller telephone number information is notified to the transfer destination telephone, and the permission signal is received by the communication unit. Then, a control unit that permits communication with the caller telephone,
The forwarding telephone is
A receiver for receiving the caller telephone number information;
A display unit for displaying source telephone number information received by the receiving unit;
An operation unit for performing a permission operation for permitting communication with a caller telephone set specified by the caller telephone number information;
And a management unit that transmits the permission signal to the telephone when the permission operation is performed on the operation unit. A communication method performed by a telephone having a communication unit that receives an incoming signal including caller telephone number information indicating a caller telephone and a permission signal for permitting communication with the caller telephone,
A storage step of storing a plurality of communication destination telephone number information identifying each of a plurality of telephones including a predetermined transfer destination telephone;
When the communication unit receives an incoming call signal, communication with the caller telephone is permitted when the caller telephone number information included in the incoming call signal is stored in the storage step as the destination telephone number information. If the source telephone number information is not stored in the storage step as the destination telephone number information, the source telephone number information is notified to the transfer destination telephone, and the permission signal is received by the communication unit. Then, a communication method comprising: a control step for permitting communication with the caller telephone set.

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