JP6326989B2 - Call control method, call control device, and call control system - Google Patents

Description

  The present case relates to a call control method, a call control device, and a call control system.

  With an increase in communication demand, an extension telephone service using a 3G mobile phone (3G: 3rd Generation) conforming to the standard of the third generation mobile communication system has spread to many companies. In an enterprise, a 3G mobile phone used based on a corporate contract with a carrier is lent to a regular employee in order to use an extension telephone service.

  On the other hand, non-regular workers such as temporary workers (contract employees), which are increasing in many companies, often change their workplaces, so it is not possible to lend one 3G mobile phone to each non-regular worker. It is difficult, and a common 3G mobile phone is often lent to a plurality of people. For this reason, even if the extension telephone service is used, it is difficult to sufficiently improve the business efficiency.

  Therefore, many companies are considering introducing a so-called BYOD (Bring Your Own Device). BYOD means that a communication terminal device (hereinafter referred to as “individual terminal”) owned by an individual for private use is brought into the company and used for business purposes. If BYOD is introduced, temporary employees (or full-time employees) can use personal terminals used based on personal contracts with carriers for extension telephone services, improving work efficiency without increasing equipment costs. Can be done.

  When introducing BYOD, for example, click-to-call (click-to-call) is used so that the extension telephone service is used regardless of the contracted carrier and the owner of the personal terminal is not charged for business communication charges. Call) is used. According to the click-to-call, the telephone number of the other party can be obtained via the call control server by accessing the company server's Web telephone book from the personal terminal via the Internet and selecting the other party from the Web telephone book. You can make a call.

  When introducing BYOD, since personal terminals are used for business, it is necessary to prevent leakage of information related to business. For example, when an outside person related to a business (for example, a customer) receives an external telephone call to a personal terminal, the telephone number of the person outside the company is recorded on the 3G mobile phone as an incoming call history. Undesirable from a protection standpoint.

  For this reason, for example, an IP (Internet Protocol) -PBX (Private Branch eXchange) that receives an incoming call changes a caller's telephone number to another telephone number corresponding to the telephone number (hereinafter referred to as “alternate number”). The method of transmitting to a personal terminal is used. Thereby, since the telephone number of the person outside the company is not recorded on the personal terminal, the leakage of the telephone number of the person outside the company is prevented. In addition, by registering an alternative number in the telephone book of the personal terminal, it is possible to specify the person who is the caller when receiving an incoming call.

  On the other hand, when a call is made from a personal terminal to a telephone number of a person outside the company, it is also undesirable from the viewpoint of protecting personal information that the telephone number of the personal terminal is notified to the person outside the company. In this regard, for example, Patent Document 1 describes that the extension number information corresponding to the telephone number information of the calling telephone terminal is used as the transmission source. Japanese Patent Application Laid-Open No. 2004-228561 describes that a caller is called by converting a caller's phone number into a desk company phone number.

JP 2007-13615 A JP 2007-324732 A

  However, according to the methods described in Patent Documents 1 and 2, since the telephone number of the caller is set as the extension number information and the company telephone number on the table, the person outside the company receives the incoming call history from the personal terminal. Based on this, it is impossible to call back to the personal terminal of the caller, which is not convenient for business.

  In addition, the above-mentioned alternative number used when an incoming call is received from a person outside the company needs to be prepared in advance as an external line number corresponding to each telephone number of the person outside the company. Cost increases. In addition, when multiple alternative numbers are registered in the phonebook of the personal terminal, the incoming / outgoing call history is recorded with a mixture of multiple alternative numbers and the telephone number of the private caller. It becomes difficult to distinguish between the history and business call history, and the convenience of using the personal terminal is poor.

  Therefore, there is a problem that it is difficult to effectively protect personal information when introducing BYOD. Note that this problem is not limited to 3G mobile phones, and similarly exists for other types of terminal devices.

  Accordingly, the present invention has been made in view of the above problems, and an object thereof is to provide a call control method, a call control device, and a call control system that effectively protect personal information.

  In the call control method described in this specification, when a call request is received from a terminal device, the call partner responds to the call partner with the first external number of the terminal device as a caller number. A call is made to an external line number of another terminal device, a predetermined external line number not depending on the external line number of the other terminal device is used as a caller source number, and a call is made to the second external line number of the terminal device. When the terminal device and the other terminal device are call-connected based on a call, and the terminal device receives an incoming call to the first external line number, with the external line number of the other terminal device as a source number The other party terminal device is notified of the communication partner according to the external line number, the predetermined external line number is set as a caller number, and the second external line number of the terminal apparatus is called, Based on the call and the incoming call, the terminal device and the other terminal device It is a way to connect.

  The call control device described in the present specification includes a communication processing unit that communicates with a terminal device via a network, and the communication processing unit receives a call request from a terminal device with a call partner designated. Using the first external line number of the terminal device as a caller number, a call is made to the external line number of another terminal device corresponding to the other party, and a predetermined external line number independent of the external line number of the other terminal device is called As a number, a call is made to the second external number of the terminal device, the terminal device and the other terminal device are call-connected based on both calls, and the external number of the other terminal device is set as the caller number When the terminal device receives an incoming call to the first external line number, the terminal device is notified of the other party corresponding to the external line number of the other terminal device, and the predetermined external line number is transmitted. As the original number, the second external line number of the terminal device And call, and a call control unit for call connection with the terminal device and the other terminal device based on emitting a call and the called.

  The call control system described in this specification includes a call control device and a database device. The call control device includes a communication processing unit that communicates with a terminal device via a network, and the communication processing unit includes: When the call partner receives a specified call request, the external line of another terminal device corresponding to the call partner is retrieved by the database device using the first external line number of the terminal device as the caller source number. The terminal is called to the second external line number of the terminal device using a predetermined external line number that is not dependent on the external line number of the other terminal device as a transmission source number, and the terminal is based on both calls When a call is made to the first external line number of the terminal device, the device and the other terminal device are call-connected, and the external line number of the other terminal device is set as the caller source number. Said The caller according to the external line number of the terminal apparatus is notified to the terminal apparatus, the predetermined external line number is used as a caller number, and the call is made to the second external line number of the terminal apparatus. A call control unit configured to call-connect the terminal device and the other terminal device based on the incoming call, and the database device associates the external line numbers of the communication partner and the other terminal device with each other. In response to a request of the call control unit, a holding unit that holds a registered database, and based on the database, an external line number of another terminal device corresponding to the call partner or an external line number of the other terminal device And a search unit for searching for the corresponding call partner.

  Personal information can be effectively protected.

It is a block diagram which shows an example of a telephone system. It is a block diagram which shows an example of an extension telephone server. It is a table | surface which shows an example of an authentication database and a telephone number database. It is a block diagram which shows an example of a groupware server. It is a table | surface which shows an example of the telephone directory database of a groupware server. It is a block diagram which shows an example of 3G mobile phone. It is a table | surface which shows an example of the telephone directory database of a BYOD 3G mobile telephone. It is a ladder chart which shows an example of the call processing of the extension transmission from a non-BYOD 3G mobile phone to another non-BYOD 3G mobile phone. It is a ladder chart which shows an example of the call processing of the extension transmission from a non-BYOD 3G mobile telephone to a BYOD 3G mobile telephone. It is a ladder chart which shows an example of the call processing of the extension transmission from the BYOD 3G mobile phone to the non-BYOD 3G mobile phone. It is a ladder chart which shows an example of the call processing of the outside line transmission from the non-BYOD 3G mobile phone to the outside mobile phone. It is a ladder chart showing an example of a call process for outgoing line transmission from a BYOD 3G mobile phone to a mobile phone outside the company. It is a ladder chart which shows an example of the call processing of the outside line transmission from the outside mobile phone to the non-BYOD 3G mobile phone. It is a ladder chart which shows an example of the call processing of the outside line transmission from the outside mobile phone to the BYOD 3G mobile phone. It is a flowchart which shows an example of the authentication request | requirement process of a BYOD 3G mobile telephone. It is a flowchart which shows an example of the authentication process of an extension telephone server. It is a flowchart which shows an example of the transmission process of a BYOD 3G mobile telephone. It is a flowchart which shows an example of the calling process from the BYG 3G mobile telephone in an extension telephone server. It is a flowchart which shows an example of the incoming call process of a BYOD 3G mobile telephone. It is a flowchart which shows an example of the incoming call process to the 3G mobile telephone of BYOD in an extension telephone server.

  FIG. 1 is a configuration diagram illustrating an example of a telephone system. The telephone system includes an extension telephone server (call control device) 1, a groupware server (database device) 2, and 3G mobile phones (# 1 to # 3) 3a and 3b.

  The telephone system enables, for example, an internal call between 3G mobile phones 3a and 3b in the office and an external call between the external mobile phone 4 and 3G mobile phones 3a and 3b. In the present embodiment, the mobile phones 3a, 3b, and 4 are given as terminal devices that can perform an extension call and an external call. However, the present invention is not limited to this, and other types of terminal devices that have a telephone function such as a smartphone. May be used.

  The 3G mobile phone (# 1, # 2) 3a is a terminal device used based on a corporate contract with the carrier # 1, and is wirelessly connected to the mobile communication network # 1 operated by the carrier # 1. . The 3G mobile phone (# 1, # 2) 3a is lent to a regular employee as a business phone, for example.

  On the other hand, the 3G mobile phone (# 3) 3b is a terminal device used based on a personal contract with the carrier # 2, and is wirelessly connected to the mobile communication network # 2 operated by the carrier # 2. The 3G mobile phone (# 3) 3b is, for example, a phone owned by a temporary employee in the company for private use.

  The extension telephone server 1 sets the type of the 3G mobile phone (# 1, # 2) 3a of the regular employee as “non-BYOD” and the type of the 3G mobile phone (# 3) 3b of the temporary employee as “BYOD”. 3a and 3b are managed. Also, the extension telephone server 1 manages the names (names) of the owners of the 3G mobile phones (# 1 to # 3) 3a and 3b as “user # 1” to “user # 3” as an example, The name (name) of the owner of the mobile phone 4 is managed as an “external user” as an example.

  In the non-BYOD 3G mobile phone (# 1, # 2) 3a, an outside line number for external use ("050 number") is set in addition to a normal outside line number ("090 number"). In this example, the normal external numbers of the 3G mobile phone (# 1, # 2) 3a are “090-21” and “090-22”, respectively, and the 3G mobile phone (# 1, # 2) 3a is outside the company. The external line numbers for use are “050-21” and “050-22”, respectively. In addition, “21” and “22” are set as extension numbers in the 3G mobile phone (# 1, # 2) 3a, respectively.

  The BYOD 3G mobile phone (# 3) 3b is set with a private external line number (“090 number”, second external line number) and a business external line number (“050 number”, first external line number) Has been. In this example, the private external line number of the 3G mobile phone (# 3) 3a is “090-31”, and the business external line number of the 3G mobile phone (# 3) 3b is “050-31”. Further, “31” is set as the extension number in the 3G mobile phone (# 3) 3b. The external line number of the mobile phone 4 outside the company is “070-11”.

  The extension telephone server 1 provides an extension telephone service to the 3G mobile phones (# 1 to # 3) 3a and 3b. The extension telephone server 1 is connected to the mobile communication network # 1, the Internet (network), and the groupware server 2.

  The extension telephone server 1 transmits / receives call signals to / from the non-BYOD 3G mobile phone (# 1, # 2) 3a via the mobile communication network # 1 (see paths R1 and R2). That is, the extension telephone server 1 calls the non-BYOD 3G mobile phone (# 1, # 2) 3a via the mobile communication network # 1, and the non-BYOD 3G mobile phone (# 1, # 2). An incoming call is received from 3a.

  Further, the extension telephone server 1 transmits / receives a call signal to / from the BYOD 3G mobile phone (# 3) 3b via the mobile communication networks # 1 and # 2 (see path R3a). That is, the extension telephone server 1 calls the BYOD 3G mobile phone (# 3) 3b via the mobile communication networks # 1 and # 2.

  Further, the extension telephone server 1 transmits and receives data signals such as IP (Internet Protocol) packets to and from the BYOD 3G mobile phone (# 3) 3b via the mobile communication network # 2 and the Internet (route) R3b). More specifically, the extension telephone server 1 receives a call request designating the other party from the BYOD 3G mobile phone (# 3) 3b via the mobile communication network # 2 and the Internet, and the BYOD 3G The mobile phone (# 3) 3b is notified of incoming calls from other mobile phones 3a, 3b, and 4. For this reason, the BYOD 3G mobile phone (# 3) 3b is provided with an application APL for performing data communication with the extension telephone server 1 via the Internet.

  The extension telephone server 1 and the groupware server 2 operate as a call control system that controls call signals. The groupware server 2 is provided in, for example, an in-house LAN (Local Area Network). The groupware server 2 includes the name of the owner of the external mobile phone 4 (external user) and the names of the owners of the 3G mobile phones (# 1 to # 3) 3a and 3b (users # 1 to # 3). A telephone directory database in which highly confidential information is recorded is maintained.

  When the extension telephone server 1 receives a call request from the 3G mobile phone (# 3) 3b, the extension number of the external mobile phone 4 according to the designated call partner or a non-BYOD 3G mobile phone (# 1, # 2) Requests retrieval of extension number 3a. In response to the search request from the extension telephone server 1, the groupware server 2 searches the telephone directory database for the external line number of the mobile phone 4 or the extension number of the non-BYOD 3G mobile phone (# 1, # 2) 3a. The search result is notified to the extension telephone server 1. The extension telephone server 1 makes a call to the designated outside line number of the other party based on the search result.

  Further, when the extension telephone server 1 receives an incoming call to the extension number of the 3G mobile phone (# 3) 3b or the business outside line number, the extension server 1 sends the name of the sender based on the sender number to the groupware server 2. Request a search. The groupware server 2 searches the name of the caller based on the caller number and notifies the extension telephone server 1 of the search result.

  The extension telephone server 1 notifies the 3G mobile phone (# 3) 3b via the Internet that there is a call (incoming call) from the searched name. At this time, the 3G mobile phone (# 3) 3b notifies the extension telephone server 1 of the availability of the incoming call via the Internet.

  Next, the configuration of the extension telephone server 1, the groupware server 2, and the 3G mobile phones (# 1 to # 3) 3a and 3b will be described.

  FIG. 2 is a configuration diagram showing an example of the extension telephone server 1. The extension telephone server 1 includes a central processing unit (CPU) 10, a read only memory (ROM) 11, a random access memory (RAM) 12, a hard disk drive (HDD) 13, a voice communication processing unit 14, 1 data communication processing unit (communication processing unit) 15 and second data communication processing unit 16.

  The CPU 10 is connected to the ROM 11, the RAM 12, the HDD 13, the voice communication processing unit 14, the first data communication processing unit 15, and the second data communication processing unit 16 via the data bus 17 so that signals can be input and output with each other. Has been. The ROM 11 stores a program for driving the CPU 10. The RAM 12 functions as a working memory for the CPU 10.

  The HDD 13 stores a telephone number database (DB) 130, an authentication database (DB) 131, and groupware information 132 indicating the IP address of the groupware server 2. The voice communication processing unit 14 transmits / receives call signals to / from the outside mobile phone 4 and 3G mobile phones (# 1 to # 3) 3a and 3b via the mobile communication network # 1.

  The first data communication processing unit 15 is, for example, a network interface card, and transmits and receives data signals (for example, IP packets) to and from the 3G mobile phone (# 3) 3b via the Internet. The second data communication processing unit 16 is a network interface card, for example, and performs data communication with the groupware server 2 via a dedicated line such as a VPN (Virtual Private Network) based on the groupware information 132.

  When the CPU 10 reads the program from the ROM 11, an authentication processing unit 100 and a call control unit 101 are formed as functions. The authentication processing unit 100 authenticates the BYOD 3G mobile phone (# 3) 3b based on the authentication DB 131.

  An example of the authentication DB 131 is shown in FIG. In the authentication DB 131, for each item number (see “No.”), the extension number and password of the BYOD 3G mobile phone (# 3) 3b are registered in association with each other. The authentication processing unit 100 authenticates the BYOD 3G mobile phone (# 3) 3b when the extension number and password transmitted from the BYOD 3G mobile phone (# 3) 3b match the registered contents of the authentication DB 131.

  The authentication DB 131 registers the authentication status, IP address, and validity period of the BYOD 3G mobile phone (# 3) 3b for each item number. The authentication status indicates “OK” (successful authentication) in the case of the authenticated 3G mobile phone (# 3) 3b, and “NG” (authentication failure) in the case of the unauthenticated 3G mobile phone (# 3) 3b. Show. The authentication request process on the 3G mobile phone (# 3) 3b side is performed by the application APL.

  The IP address indicates the IP address of the BYOD 3G mobile phone (# 3) 3b. The authentication processing unit 100 communicates with the BYOD 3G mobile phone (# 3) 3b to be authenticated via the Internet with the IP address acquired from the authentication DB 131 as a destination.

  The authentication processing unit 100 periodically performs authentication processing of the BYOD 3G mobile phone (# 3) 3b. Therefore, the authentication state of the BYOD 3G mobile phone (# 3) 3b becomes “NG” when it exceeds the valid period (for example, date and time). This prevents temporary employees from using the 3G mobile phone (# 3) 3b for business without any limit.

  The call control unit 101 controls outgoing and incoming calls of the authenticated BYOD 3G mobile phone (# 3) 3b and the non-BYOD 3G mobile phone (# 1, # 2) 3a based on the telephone number DB 130. To do.

  FIG. 3B shows an example of the telephone number DB 130. The telephone number DB 130 corresponds to the extension number, the external line number, and the type (BYOD or non-BYOD) of the 3G mobile phones (# 1 to # 3) 3a and 3b for each item number (see “No.”). Attached and registered. The outside line number includes the above 090 number and 050 number.

  When the call control unit 101 receives an incoming call from the non-BYOD 3G mobile phone (# 1, # 2) 3a having the extension number as the destination number, the call control unit 101 calls the 090 number corresponding to the extension number. In this case, when the call destination is a non-BYOD 3G mobile phone (# 1, # 2) 3a, the call control unit 101 converts the caller's 090 number into a corresponding extension number and sends the extension number. Call as original number. Details of the sequence at this time are shown in FIG.

  On the other hand, when the destination is the BYOD 3G mobile phone (# 3) 3b, the call control unit 101 sets a predetermined outside line number ("050-00" in this example.) That does not depend on the outside line number of the caller. Called as a unique source line number). At this time, the call control unit 101 searches the groupware server 2 for a name corresponding to the 090 number of the caller prior to the call, and notifies the BYOD 3G mobile phone (# 3) 3b as a call notification. To do. Details of the sequence at this time are shown in FIG. 9 described later.

  When the call control unit 101 receives a call request from the BYOD 3G mobile phone (# 3) 3b, the extension number or the external line corresponding to the call partner is received from the groupware server 2. Search for a number. More specifically, when in-house users # 1 and # 2 are designated as call partners, the extension numbers of users # 1 and # 2 are searched, and when an outside user is designated, The user's external line number is searched.

  In the former case, the call control unit 101 uses the extension number as the transmission source number and calls the 090 number corresponding to the searched extension number. In the latter case, the call control unit 101 uses the 050 number as the transmission source number and makes a call to the searched external line number. Details of the sequence at this time are shown in FIGS. 10 and 12, which will be described later.

  In addition, the call control unit 101 receives an incoming call from a non-BYOD 3G mobile phone (# 1, # 2) 3a with an outside line number added with a predetermined dedicated number (in this example, “0”) as a destination number. When the call is received, a call is made to the outside line number. In this case, the call control unit 101 converts the transmission source number (090 number) into a corresponding external line number (050 number) for external use, and makes a call using the external line number as the transmission source number. Details of the sequence at this time are shown in FIG.

  When the call control unit 101 receives an incoming call from the external mobile phone 4 with the 050 number as the destination number, the call control unit 101 makes a call to the 090 number corresponding to the 050 number. In this case, when the call destination is a non-BYOD 3G mobile phone (# 1, # 2) 3a, the call control unit 101 sends the number obtained by adding the predetermined dedicated number to the caller's external line number. Call as original number. Details of the sequence at this time are shown in FIG.

  On the other hand, when the destination is a BYOD 3G mobile phone (# 3) 3b, the call control unit 101 makes a call using the fixed external line number (“050-00”) as the caller number. At this time, the call control unit 101 searches the groupware server 2 for a name corresponding to the outside line number of the caller prior to the call, and notifies the BYOD 3G mobile phone (# 3) 3b as a call notification. To do. Details of the sequence at this time are shown in FIG.

  FIG. 4 is a configuration diagram illustrating an example of the groupware server 2. The groupware server 2 includes a CPU 20, a ROM 21, a RAM 22, an HDD (holding unit) 23, and a data communication processing unit 24.

  The CPU 20 is connected to the ROM 21, the RAM 22, the HDD 23, and the data communication processing unit 24 via the data bus 25 so that signals can be input and output with each other. The ROM 21 stores a program for driving the CPU 20. The RAM 22 functions as a working memory for the CPU 20.

  The HDD 23 stores a telephone directory database (DB) 230. The data communication processing unit 24 is, for example, a network interface card, and performs data communication with the extension telephone server 1.

  When the CPU 20 reads a program from the ROM 21, a search processing unit (search unit) 200 is formed as a function. In response to a search request from the extension telephone server 1, the search processing unit 200 searches for an extension number, an outside line number, or a name corresponding to the other party on the basis of the telephone directory DB 230.

  FIG. 5 shows an example of the phone book DB 230 of the groupware server 2. In the telephone directory DB 230, the name of the other party and the telephone number (extension number or external line number) are registered in association with each other for each item number (see “No.”). In the example of FIG. 5, the phone book DB 230 includes the names of the owners (users # 1 to # 3) and extension numbers of the 3G mobile phones (# 1 to # 3) 3a and 3b, and the ownership of the mobile phone 4 outside the company. Name (external user) and outside line number are registered.

  FIG. 6 is a configuration diagram illustrating an example of the 3G mobile phones 3a and 3b. The 3G mobile phones 3a and 3b include a CPU 30, a ROM 31, a RAM 32, a storage memory 33, a keyboard 34, a screen 35, a microphone 36, a speaker 37, and a communication processing unit 38.

  The CPU 30 is connected to a ROM 31, a RAM 32, a storage memory 33, a keyboard 34, a screen 35, a microphone 36, a speaker 37, and a communication processing unit 38 via a data bus 39 so that signals can be input and output. . The ROM 31 stores a program that drives the CPU 30. The RAM 32 functions as a working memory for the CPU 30.

  The storage memory 33 is, for example, a nonvolatile memory. The storage memory 33 stores a telephone directory database (DB) 330, extension telephone server information 331 indicating the IP address of the extension telephone server 1, and call history information 332 indicating a call history. The keyboard 34 is used to operate the 3G mobile phones 3a and 3b. The screen 35 is a liquid crystal display, for example, and displays information such as the name of the other party and the telephone numbers of the caller and receiver.

  The microphone 36 collects sound during a call, and the speaker 37 outputs the voice of the other party during the call. The communication processing unit 38 performs data communication and call processing via the mobile communication networks # 1 and # 2. The communication processing unit 38 performs data communication with the extension telephone server 1 based on the extension telephone server information 331.

  In the BYOD 3G mobile phone (# 3) 3b, when the CPU 30 reads the program from the ROM 31, the authentication request processing unit 300, the outgoing call processing unit 301, the incoming call processing unit 302, the communication control unit 303, and the driver 304 function as functions. It is formed. Among the formed functions, the authentication request processing unit 300, the transmission processing unit 301, and the incoming call processing unit 302 are functions of the application APL.

  On the other hand, in the non-BYOD 3G mobile phone (# 1, # 2) 3a, when the CPU 30 reads a program from the ROM 31, a communication control unit 303 and a driver 304 are formed as functions. The communication control unit 303 controls data communication and a call via the communication processing unit 38. The communication control unit 303 generates or updates the call history information 332 based on the phone book DB 330 every time a call is made. The driver 304 drives the keyboard 34, the screen 35, the microphone 36, the speaker 37, and the communication processing unit 38 in accordance with instructions from the communication control unit 303.

  The authentication request processing unit 300 processes an authentication request for the extension telephone server 1. When the authentication request processing unit 300 is notified of successful authentication, the transmission processing unit 301 requests the extension telephone server 1 via the Internet by designating a call partner and makes a call in response to an operation of the keyboard 34. In addition, when the authentication request processing unit 300 is notified of authentication success, the incoming call processing unit 302 processes the call notification received from the extension telephone server 1 via the Internet. The transmission processing unit 301 and the incoming processing unit 302 display the name of the transmission destination and the transmission source on the screen 35 based on the telephone directory DB 330.

  FIG. 7 shows an example of the phone book DB 330 of the BYOD 3G mobile phone 3b. In the telephone directory DB 330, a name and a telephone number (extension number or external line number) are registered in association with each item number (see “No.”).

  In the example of FIG. 7, the name (owner / internal user) of the owner of the business-related mobile phones 3 a and 4 and the fixed external number (“050-00”) are registered in the telephone directory DB 330. Further, in the phone book DB 330, the names of friends of the owners of the BYOD 3G mobile phone 3b (see “XX”, “XX”, “ΔΔ”) and the outside line numbers (“090-91”, “090”) -92 "," 090-93 "). The “internal / external user” is registered as a general term for the owner of the external mobile phone 4 and the owner of the internal mobile phone 3a. Therefore, the owner of the BYOD 3G mobile phone 3b can clearly distinguish between a call with a business-related person and a private call with a friend in the call history information 332. The name “user # 3” corresponding to the extension number “31” is registered in the telephone directory DB 330 of the non-BYOD 3G mobile phone (# 1, # 2) 3a.

  Next, the call processing sequence between the mobile phone 4 outside the company, the non-BYOD 3G mobile phone (# 1, # 2) 3a, and the BYOD 3G mobile phone (# 3) 3b is as follows. Each combination will be described.

  FIG. 8 is a ladder chart (sequence diagram) showing an example of call processing for extension transmission from a non-BYOD 3G mobile phone (# 1) 3a to another non-BYOD 3G mobile phone (# 2) 3a. The 3G mobile phone (# 1) 3a makes a call to the extension number “22” of the destination 3G mobile phone (# 2) 3a with the caller source number being a normal outside line number “090-21”. The call signal is relayed to the extension telephone server 1 by the mobile communication network # 2. 8 to 14, the caller number is described after “From:”, and the called party number is described after “To:”.

  The call control unit 101 of the extension telephone server 1 refers to the type (see FIG. 3B) of the telephone number DB 130 based on the caller number and the callee number, so that the non-BYOD 3G mobile phone (# 1) It is determined from 3a that there has been an extension call with the destination being a non-BYOD 3G mobile phone (# 2) 3a, and the following processing is performed. Based on the telephone number DB 130, the call control unit 101 sets the extension number “21” corresponding to the normal outside line number “090-21” as the normal number of the destination 3G mobile phone (# 2) 3a. Call the external number "090-22". As a result, call processing is performed between the non-BYOD 3G mobile phones (# 1, # 2) 3a.

  FIG. 9 is a ladder chart showing an example of call processing for extension transmission from a non-BYOD 3G mobile phone (# 1) 3a to a BYOD 3G mobile phone (# 3) 3b. The 3G mobile phone (# 1) 3a makes a call to the extension number “31” of the destination 3G mobile phone (# 3) 3b with the caller source number being a normal outside line number “090-21”. The call signal is relayed to the extension telephone server 1 by the mobile communication network # 2.

  The call control unit 101 of the extension telephone server 1 refers to the type of the telephone number DB 130 on the basis of the caller number and the callee number, thereby transferring the callee from the non-BYOD 3G mobile phone (# 1) 3a to the BYOD 3G. The mobile phone (# 3) 3b is determined to have received an extension call, and the following processing is performed. The call control unit 101 sends a voice message to the effect that the owner of the destination 3G mobile phone (# 3) 3b is being called via the mobile communication network # 2 to the source 3G mobile phone (# 1). ) Flow to 3a.

  Next, the call control unit 101 requests the groupware server 2 to search for a name corresponding to the caller's external line number “090-21”. In response to the search request, the search processing unit 200 of the groupware server 2 searches the telephone directory DB 230 for the name “user # 1” corresponding to the caller's external line number “090-21” (step St91). As a result, the extension telephone server 1 is notified.

  Next, the call control unit 101 notifies a call notification from the searched name “user # 1” to the destination 3G mobile phone (# 3) 3b via the Internet. The incoming call processing unit 302 of the 3G mobile phone (# 3) 3b displays the notified name “user # 1” on the screen 35 and accepts an operation for selecting whether to accept incoming calls from the owner.

  The incoming call processor 302 may record the notified name “user # 1” in the storage memory 33. In this case, when calling back from the BYOD 3G mobile phone (# 3) 3b to the 3G mobile phone (# 1) 3a, the recorded name “user # 1” is displayed on the screen 35, for example. The person can select the other party to call back by specifying the name information. The incoming call processing unit 302 transmits a response indicating the selection result to the extension telephone server 1 via the Internet.

  When the call control unit 101 of the extension telephone server 1 receives the response message indicating that the incoming call is permitted, the call source number is set to a fixed external number “050-00” that does not depend on the external line number of the call source, A call is made to the business external number “090-31” of the 3G mobile phone (# 3) 3b. The call signal is relayed to the 3G mobile phone (# 3) 3b by the mobile communication networks # 1 and # 2. When the call control unit 101 receives a response indicating that the incoming call is not permitted, the call control unit 101 sends a voice message indicating that the response is impossible via the mobile communication network # 2 to the source 3G mobile phone (# 1) 3a. Shed.

  Upon receiving the incoming call, the communication control unit 303 of the 3G mobile phone (# 3) 3b displays the name “internal / external user” corresponding to the caller fixed external number “050-00” on the screen 35 based on the telephone directory DB 330. To display. When the communication control unit 303 responds to the incoming call according to the operation of the owner, the call signal of the response is relayed to the extension telephone server 1 by the mobile communication networks # 1 and # 2.

  When the call control unit 101 of the extension telephone server 1 receives the response, the call control unit 101 stops the voice message sent to the originating 3G mobile phone (# 1) 3a (St92). Next, the call control unit 101 establishes a call connection between the caller 3G mobile phone (# 1) 3a and the callee 3G mobile phone (# 3) 3b (step St93). As a result, call processing is performed between the non-BYOD 3G mobile phone (# 1) 3a and the BYOD 3G mobile phone (# 3) 3b.

  FIG. 10 is a ladder chart showing an example of call processing for extension transmission from a BYOD 3G mobile phone (# 3) 3b to a non-BYOD 3G mobile phone (# 1) 3a. In this process, it is assumed that the 3G mobile phone (# 3) 3b has been authenticated by the extension telephone server 1 in advance.

  The call processing unit 301 of the 3G mobile phone (# 3) 3b sends a call request (call request message) to the name “user # 1” designated by the owner's operation via the Internet. Transmit to the extension telephone server 1. The call request message includes the name of the other party and the extension number “31” of the request source.

  Next, the call control unit 101 requests the groupware server 2 to search for the extension number of the called party corresponding to the name “user # 1”. In response to the search request, the search processing unit 200 of the groupware server 2 searches the telephone directory DB 230 for the extension number “21” of the called party corresponding to the name “user # 1” (step St101), and as a search result. The extension telephone server 1 is notified.

  Next, the call control unit 101 of the extension telephone server 1 sets the caller source number as the fixed external line number “050-00” and sets the private external line number “090-31” of the requesting 3G mobile phone (# 3) 3b. Make a call. The call signal is relayed to the 3G mobile phone (# 3) 3b by the mobile communication networks # 1 and # 2.

  Upon receiving the incoming call, the communication control unit 303 of the 3G mobile phone (# 3) 3b displays the name “internal / external user” corresponding to the caller fixed external number “050-00” on the screen 35 based on the telephone directory DB 330. To display. When the communication control unit 303 responds to the incoming call according to the operation of the owner, the call signal of the response is relayed to the extension telephone server 1 by the mobile communication networks # 1 and # 2.

  Next, when the 3G mobile phone (# 3) 3b responds, the call control unit 101 of the extension telephone server 1 sends a voice message indicating that the owner of the destination 3G mobile phone (# 1) 3a is being called. Then, the data is sent to the requesting 3G mobile phone (# 1) 3a via the mobile communication networks # 1 and # 2.

  Next, the call control unit 101 of the extension telephone server 1 sets the caller source number as the extension number “31” of the request source, based on the telephone number DB 130, and the normal outside line number “090-” corresponding to the extension number “21”. Call 21 ”. When receiving the incoming call, the communication control unit 303 of the 3G mobile phone (# 1) 3a displays the name “user # 3” corresponding to the extension number “31” of the caller on the screen 35 based on the telephone directory DB 330. . When the communication control unit 303 responds to the incoming call according to the operation of the owner, the call signal of the response is relayed to the extension telephone server 1 by the mobile communication network # 1.

  When receiving a response, the call control unit 101 of the extension telephone server 1 stops the voice message that has been sent to the requesting 3G mobile phone (# 3) 3b (step St102). Next, the call control unit 101 makes a call connection between the requesting 3G mobile phone (# 3) 3b and the destination 3G mobile phone (# 1) 3a (step St103). As a result, call processing is performed between the non-BYOD 3G mobile phone (# 1) 3a and the BYOD 3G mobile phone (# 3) 3b.

  FIG. 11 is a ladder chart showing an example of call processing for outgoing line transmission from the non-BYOD 3G mobile phone (# 1) 3a to the mobile phone 4 outside the company. The 3G mobile phone (# 1) 3a is a phone number obtained by adding a special number “0” to the external line number “070-11” of the mobile phone 4 outside the company, with the source number as the normal external line number “090-21” Call “0-070-11”. The call signal is relayed to the extension telephone server 1 by the mobile communication network # 1.

  The call control unit 101 of the extension telephone server 1 refers to the type of the telephone number DB 130 on the basis of the caller number and the callee number, thereby transferring the callee from the non-BYOD 3G mobile phone (# 1) 3a to a mobile phone outside the company. It is determined that there is an outside line transmission for the telephone 4, and the following processing is performed. Based on the telephone number DB 130, the call control unit 101 sets the caller's source number as an outside line number “050-21” corresponding to the normal outside line number “090-21”. Call the outside line number "070-11". That is, the call control unit 101 sets the number obtained by deleting the dedicated number “0” from the telephone number “0-070-11” as the caller number. As a result, call processing is performed between the non-BYOD 3G mobile phone (# 1) 3a and the mobile phone 4 outside the company.

  FIG. 12 is a ladder chart showing an example of call processing for outgoing line transmission from the BYOD 3G mobile phone (# 3) 3b to the mobile phone 4 outside the company. In this process, it is assumed that the 3G mobile phone (# 3) 3b has been authenticated by the extension telephone server 1 in advance.

  The call processing unit 301 of the 3G mobile phone (# 3) 3b sends a call request (call request message) with the name “external user” designated as the other party to be called as an incoming call by the operation of the owner. To the extension telephone server 1. An extension number “31” indicating the request source is added to the request for calling.

  Next, the call control unit 101 requests the groupware server 2 to search for the external line number of the called party corresponding to the name “external user”. In response to the search request, the search processing unit 200 of the groupware server 2 searches the telephone directory DB 230 for the incoming call destination external number “070-11” corresponding to the name “external user” (step St111), and the search result. To the extension telephone server 1.

  Next, the call control unit 101 of the extension telephone server 1 sets the caller source number as a fixed outside line number “050-00” that does not depend on the outside line number of the destination, and the private telephone number (# 3) 3b of the request source Call the outside line number "090-31". The call signal is relayed to the 3G mobile phone (# 3) 3b by the mobile communication networks # 1 and # 2.

  Upon receiving the incoming call, the communication control unit 303 of the 3G mobile phone (# 3) 3b displays the name “internal / external user” corresponding to the caller fixed external number “050-00” on the screen 35 based on the telephone directory DB 330. To display. When the communication control unit 303 responds to the incoming call according to the operation of the owner, the call signal of the response is relayed to the extension telephone server 1 by the mobile communication networks # 1 and # 2.

  Next, when the 3G mobile phone (# 3) 3b responds, the call control unit 101 of the extension telephone server 1 sends a voice message to the effect that the owner of the mobile phone 4 outside the destination is being called. The message is sent to the requesting 3G mobile phone (# 3) 3b via the communication networks # 1 and # 2.

  Next, the call control unit 101 sets the caller source number as the business call outside line number “050-31” corresponding to the extension number “31” of the request source, and the searched outside line number “070-11”. Make a call. When the outside mobile phone 4 receives an incoming call, the outside line number “070-11” or the name “user # 3” is displayed on the screen and recorded in the call history. When the mobile phone 4 outside the company responds to the incoming call according to the operation of the owner, the call signal of the response is relayed to the extension telephone server 1 by the mobile communication networks # 1 and # 2.

  When receiving a response, the call control unit 101 of the extension telephone server 1 stops the voice message that has been sent to the requesting 3G mobile phone (# 3) 3b (step St112). Next, the call control unit 101 makes a call connection between the requesting 3G mobile phone (# 3) 3b and the callee outside mobile phone 4 (step St113). As a result, call processing is performed between the BYOD 3G mobile phone (# 3) 3b and the mobile phone 4 outside the company.

  As described above, the call control unit 101 of the extension telephone server 1 is configured such that the first data communication processing unit 15 receives a call request for specifying the other party from the BYOD 3G mobile phone (# 3) 3b. A call is made to the external line number of the external mobile phone 4 corresponding to the other party of the call, using the business external line number of the 3G mobile phone (# 3) 3b as the caller source number. For this reason, the business outside line number (050 number) of the BYOD 3G mobile phone (# 3) 3b is notified to the outside mobile phone 4, but the private outside line number (090 number) is not notified.

  Therefore, the private external number of the BYOD 3G mobile phone (# 3) 3b is not notified to the outside person who is the owner of the mobile phone 4, and the personal information of the owner of the 3G mobile phone (# 3) 3b is not Protected. Also, since the business outside line number of the BYOD 3G mobile phone (# 3) 3b is notified to the external mobile phone 4, the callback from the external mobile phone 4 to the 3G mobile phone (# 3) 3b is possible. It is.

  In addition, the call control unit 101 uses the fixed outside line number “050-00” that does not depend on the outside line number of the mobile phone 4 outside the company as the caller number and calls the private outside line number of the BYOD 3G mobile phone (# 3) 3b. Call. Therefore, since the common telephone number “050-00” is recorded in the call history information 332 of the BYOD 3G mobile phone (# 3) 3b regardless of the external line number of the mobile phone 4 outside the company, Therefore, the convenience of use is improved.

  The call control unit 101 makes a call connection between the BYOD 3G mobile phone (# 3) 3b and the external mobile phone 4 based on both calls. Thus, a call is performed between the BYOD 3G mobile phone (# 3) 3b and the mobile phone 4 outside the company.

  FIG. 13 is a ladder chart showing an example of call processing for outgoing line transmission from an external mobile phone 4 to a non-BYOD 3G mobile phone (# 1) 3a. The mobile phone 4 outside the company calls the external line number “050-21” of the destination 3G mobile phone (# 1) 3a with the caller number as the external line number “070-11”. The call signal is relayed to the extension telephone server 1 by the mobile communication network # 1.

  The call control unit 101 of the extension telephone server 1 refers to the type of the telephone number DB 130 on the basis of the caller number and the callee number, so that the callee from the mobile phone 4 outside the company is a non-BYOD 3G mobile phone (# 1 ) It is determined that the extension 3a has been transmitted, and the following processing is performed. The call control unit 101 sets the caller source number as the telephone number “0-070-11” obtained by adding the dedicated number “0” to the external line number “070-11”, based on the telephone number DB 130, and the destination external line A call is made to the normal outside line number “090-22” corresponding to the number “050-21”. As a result, call processing is performed between the external mobile phone 4 and the non-BYOD 3G mobile phone (# 1) 3a.

  FIG. 14 is a ladder chart showing an example of an external line call process from the outside mobile phone 4 to the BYOD 3G mobile phone (# 3) 3b. The mobile phone 4 outside the company makes a call to the business-use external line number “050-31” of the destination 3G mobile phone (# 3) 3b with the source number as the external line number “070-11”. The call signal is relayed to the extension telephone server 1 by the mobile communication networks # 1 and # 2.

  The call control unit 101 of the extension telephone server 1 refers to the type of the telephone number DB 130 based on the caller number and the callee number, so that the 3D mobile phone with the BYOD as the callee from the mobile phone 4 outside the company (# 3) It is determined that there is an extension transmission 3b, and the following processing is performed. When receiving an incoming call, the call control unit 101 sends a voice message indicating that the owner of the destination 3G mobile phone (# 3) 3b is being called via the mobile communication networks # 1 and # 2. It flows to the mobile phone 4 outside the sender.

  Next, the call control unit 101 requests the groupware server 2 to search for a name corresponding to the caller's external line number “070-11”. In response to the search request, the search processing unit 200 of the groupware server 2 searches the telephone directory DB 230 for the name “external user” corresponding to the caller's external line number “070-11” (step St121), and the search result. To the extension telephone server 1.

  Next, the call control unit 101 notifies the called 3G mobile phone (# 3) 3b of the call notification from the searched name “external user” via the Internet. The incoming call processing unit 302 of the 3G mobile phone (# 3) 3b displays the notified name “external user” on the screen 35 and accepts an operation for selecting whether to accept incoming calls from the owner.

  The incoming call processor 302 may record the notified name “user # 1” in the storage memory 33. In this case, when calling back from the BYOD 3G mobile phone (# 3) 3b to the 3G mobile phone (# 1) 3a, the recorded name “user # 1” is displayed on the screen 35, for example. The person can select the other party to call back by specifying the name information. The incoming call processing unit 302 transmits a response indicating the selection result to the extension telephone server 1 via the Internet.

  When the call control unit 101 of the extension telephone server 1 receives a response indicating that the incoming call is permitted, the call source number is set to a fixed external line number “050-00” that does not depend on the external line number of the caller, and the destination 3G The mobile telephone (# 3) 3b is called to the business external number “090-31”. The call signal is relayed to the 3G mobile phone (# 3) 3b by the mobile communication networks # 1 and # 2. When the call control unit 101 receives a response indicating that the incoming call is not permitted, the call control unit 101 sends a voice message indicating that the response is impossible via the mobile communication networks # 1 and # 2 to the mobile phone 4 outside the caller. Shed.

  Upon receiving the incoming call, the communication control unit 303 of the 3G mobile phone (# 3) 3b displays the name “internal / external user” corresponding to the caller fixed external number “050-00” on the screen 35 based on the telephone directory DB 330. To display. When the communication control unit 303 responds to the incoming call according to the operation of the owner, the call signal of the response is relayed to the extension telephone server 1 by the mobile communication networks # 1 and # 2.

  When receiving the response, the call control unit 101 of the extension telephone server 1 stops the voice message that has been sent to the mobile phone 4 outside the caller (step St122). Next, the call control unit 101 makes a call connection between the mobile phone 4 outside the caller and the 3G mobile phone (# 3) 3b as the destination (step St123). Thus, a call process is performed between the mobile phone 4 outside the company and the BYOD 3G mobile phone (# 3) 3b.

  In this way, the call control unit 101 fixes the incoming call to the business external line number of the BYOD 3G mobile phone (# 3) 3b that uses the external line number of the external mobile phone 4 as the caller number. A call is made to the private external line number of the 3G mobile phone (# 3) 3b using the external line number as a transmission source number. The call control unit 101 makes a call connection between the 3G mobile phone (# 3) 3b and the external mobile phone 4 based on the outgoing call and incoming call.

  Therefore, the outside line number of the outside mobile phone 4 is not notified to the BYOD 3G mobile phone (# 3) 3b, but the fixed outside line number “050-00” is notified. Therefore, since the telephone number of the person outside the company is not recorded on the 3G mobile phone (# 3) 3b, leakage of the telephone number of the person outside the company is prevented. That is, the personal information of the owner of the mobile phone 4 outside the company is protected.

  In addition, since the common telephone number “050-00” is recorded in the call history information 332 of the BYOD 3G mobile phone (# 3) 3b regardless of the external line number of the mobile phone 4 outside the company, Can be easily distinguished from the call history, and convenience in use is improved. Furthermore, since the fixed external line number “050-00” does not depend on the external line number of the mobile phone 4 outside the company, it is not necessary to prepare it for each person outside the call target, and the communication cost is reduced.

  In the present embodiment, the terminal 3b is notified of the other party corresponding to the external line number “070-11” of the mobile phone 4 outside the company. For this reason, although the caller number is a predetermined external number “050-11” in which the caller (“external user”) cannot be specified, the BYOD 3G mobile phone (# 3) Callback from 3b to the mobile phone 4 outside the company is possible.

  In addition, when there is an incoming call to the private external number of the 3G mobile phone (# 3) 3b that uses the external line number of the mobile phone 4 outside the company as the caller number, the call control unit 101 causes the terminal device to A call partner corresponding to the external line number “070-11” of the mobile phone 4 outside the office is notified, and whether or not an incoming call can be confirmed. When the call control unit 101 receives an incoming call permission, the call control unit 101 calls the private external line number of the 3G mobile phone (# 3) 3b.

  For this reason, the owner of the BYOD 3G mobile phone (# 3) 3b can know in advance a call partner that is not specified by the fixed external line number “050-00” and can select whether or not to accept the incoming call. Therefore, even if the owner of the BYOD 3G mobile phone (# 3) 3b receives an incoming call from the mobile phone 4 outside the company after retirement, he or she can reject the response without making a call.

  Next, an authentication process between the BYOD 3G mobile phone (# 3) 3b and the extension telephone server 1 will be described.

  FIG. 15 is a flowchart showing an example of the authentication request processing of the BYOD 3G mobile phone (# 3) 3b. The authentication request processing unit 300 transmits an authentication request message to the extension telephone server 1 via the Internet (step St1). The authentication request message includes the extension number and password of the 3G mobile phone (# 3) 3b.

  Next, the authentication request processing unit 300 determines the success or failure of authentication based on the notification message received from the extension telephone server 1 via the Internet (step St2). When the authentication request processing unit 300 fails in the authentication (No in Step St2), the authentication request processing unit 300 notifies the owner of the authentication failure by displaying the authentication failure on the screen 35, for example (Step St5), and ends the process. To do.

  On the other hand, if the authentication is successful (Yes in step St2), the authentication request processing unit 300 waits for a certain time (step St3) and continues the process (No in step St4), that is, the operation of the application APL is performed. When continuing, the process of step St1 is performed again. This is because the extension telephone server 1 provides a valid period for successful authentication (see FIG. 3A). If the operation of the application APL does not continue (Yes in step St4), the authentication request processing unit 300 ends the process. In this way, the BYOD 3G mobile phone (# 3) 3b performs authentication request processing.

  FIG. 16 is a flowchart showing an example of the authentication process of the extension telephone server 1. The authentication processing unit 100 determines whether an authentication request message is received from the BYOD 3G mobile phone (# 3) 3b via the Internet (step St41). If the authentication processing unit 100 has not received the authentication request message (No in step St41), the authentication processing unit 100 performs the process in step St45 described later.

  When the authentication processing unit 100 receives the authentication request message (Yes in Step St41), the authentication processing unit 100 refers to the authentication DB 131 (Step St42) and determines whether or not the authentication is successful (Step St43). More specifically, when the extension number and password included in the authentication request message match the registration contents of the authentication DB 131, the authentication processing unit 100 determines that the authentication is successful and does not match the registration contents of the authentication DB 131. If it is, it is determined that authentication has failed.

  If the authentication is successful (Yes in step St43), the authentication processing unit 100 updates the authentication state corresponding to the extension number to “OK” in the authentication DB 131 (step St44). At this time, the valid period corresponding to the extension number is also updated.

  Next, the authentication processing unit 100 refers to the authentication DB 131 and determines whether or not an extension number that has exceeded the valid period has been registered (step St45). If the corresponding extension number is not registered in the authentication DB 131 (No in step St45), the authentication processing unit 100 ends the process.

  If the corresponding extension number is registered in the authentication DB 131 (Yes in step St45), the authentication processing unit 100 updates the authentication state corresponding to the extension number to “NG” (step St46). Thereby, the call control of the 3G mobile phone (# 3) 3b having the extension number exceeding the valid period is prohibited. In this way, the extension telephone server 1 performs an authentication process.

  After this processing, if the authentication processing unit 100 has received the authentication request message (Yes in step St41), the authentication processing unit 100 notifies the updated authentication state (“OK” or “NG”) via the Internet. To the BYOD 3G mobile phone (# 3) 3b. The authentication request processing unit 300 of the BYOD 3G mobile phone (# 3) 3b determines the success or failure of the authentication based on the notification message as described above (see step St2 in FIG. 15).

  Next, transmission processing from a BYOD 3G mobile phone (# 3) 3b to a non-BYOD 3G mobile phone (# 1, # 2) 3a or an external mobile phone 4 will be described. This outgoing call processing corresponds to the sequence shown in FIG. 10 and FIG.

  FIG. 17 is a flowchart showing an example of outgoing processing of the BYOD 3G mobile phone (# 3) 3b. The transmission processing unit 301 of the 3G mobile phone (# 3) 3b determines whether or not a transmission operation has been performed by the owner (step St11). If the transmission operation is not performed (No in step St11), the transmission processing unit 301 ends the process.

  When a call operation is performed (Yes in step St11), the call processing unit 301 transmits a call request message to the extension telephone server 1 via the mobile communication network # 2 and the Internet (step St12). The call request message includes the name of the other party (external user, user # 1, user # 2) specified in the call operation and the extension number of the 3G mobile phone (# 3) 3b.

  Next, the call processing unit 301 determines whether there is an incoming call from the extension telephone server 1 (step St13). When there is no incoming call (No in step St13), the transmission processing unit 301 performs the determination process in step St13 again.

  When there is an incoming call (Yes in step St13), the transmission processing unit 301 instructs the communication control unit 303 to perform the incoming call process (step St14), and ends the process. At this time, the communication control unit 303 displays the name “internal / external user” corresponding to the caller source number (“050-00”) on the screen 35 based on the telephone directory DB 330 and outputs a ring tone from the speaker 37. .

  Next, the communication control unit 303 performs a call process with the other mobile phones 3a and 4 (step St15), and ends the process. At this time, the communication control unit 303 converts the voice obtained from the microphone 36 into a voice signal and transmits the voice signal to the extension telephone server 1 via the mobile communication networks # 1 and # 2. Further, the communication control unit 303 reproduces sound from the sound signal received from the extension telephone server 1 via the mobile communication networks # 1 and # 2 and outputs the sound from the speaker 37. In this way, the BYOD 3G mobile phone (# 3) 3b performs the calling process.

  FIG. 18 is a flowchart showing an example of calling processing from a BYOD 3G mobile phone in the extension telephone server. The call control unit 101 determines whether or not a call request message has been received from the BYOD 3G mobile phone (# 3) 3b (step St61). If the call control unit 101 has not received the call request message (No in step St61), the call control unit 101 ends the process.

  When the call control unit 101 receives the call request message (Yes in step St61), the call control unit 101 calls the private line number (090 number) of the requesting 3G mobile phone (# 3) 3b (step St62). Next, the call control unit 101 determines the authentication state of the requesting 3G mobile phone (# 3) 3b based on the authentication DB 131 (step St63).

  When the authentication state is “NG” (No in Step St63), the call control unit 101 sends a voice message indicating that a response is impossible to the requesting 3G mobile phone (# 3) 3b (Step St69). Exit.

  On the other hand, if the authentication state is “OK” (Yes in step St63), the call control unit 101 sends a voice message to the requesting 3G mobile phone (# 3) 3b that the calling party is being called ( Step St64). Next, the call control unit 101 requests the groupware server 2 to search for an external line number or an extension number (telephone number) from the name of the other party specified in the call request message (step St65). Here, when the name of the other party is an external user, the outside line number of the mobile phone 4 outside the company is searched. , # 2) The extension number (“21”, “22”) of 3a is searched.

  Next, the call control unit 101 calls the external line number or extension number (telephone number) retrieved by the groupware server 2 (step St66). Here, when the name of the other party is “external user”, the call control unit 101 sets the caller number as the fixed external number “050-00” and the name of the other party as “user # 1 (# 2)”. In this case, the transmission source number is the extension number “31”.

  Next, the call control unit 101 stops the voice message sent to the requesting 3G mobile phone (# 3) 3b (step St67). Next, the call control unit 101 establishes a call connection between the requesting 3G mobile phone (# 3) 3b and the mobile phone 3a, 4 of the other party (step St68), and ends the process. In this way, the extension telephone server 1 performs call processing.

  Next, transmission processing from the non-BYOD 3G mobile phone (# 1, # 2) 3a or the external mobile phone 4 to the BYOD 3G mobile phone (# 3) 3b will be described. This outgoing call processing corresponds to the sequence shown in FIG. 9 and FIG.

  FIG. 19 is a flowchart showing an example of an incoming call process of the BYOD 3G mobile phone (# 3) 3b. The incoming call processor 302 of the 3G mobile phone (# 3) 3b determines whether a call notification is received from the extension telephone server 1 via the Internet (step St31). If the incoming call processor 302 has not received the call notification (No in step St31), the incoming call processor 302 ends the process.

  Next, when receiving the call notification (Yes in step St31), the incoming call processing unit 302 displays the name of the calling party on the screen 35 and receives a selection input indicating whether or not the incoming call is allowed (step St32). ). The selection input of whether or not the incoming call is accepted is performed by operating the keyboard 34, for example.

  Next, the incoming call processing unit 302 transmits a response message corresponding to the selection input for whether or not the incoming call is accepted to the extension telephone server 1 via the Internet (step St33). Next, the incoming call processor 302 determines whether there is an incoming call from the extension telephone server 1 (step St34).

  When there is no incoming call from the extension telephone server 1 (No in Step St34), that is, when a response indicating that the incoming call is not permitted is transmitted in Step St33, the incoming call processing unit 302 ends the processing. When there is an incoming call from the extension telephone server 1 (Yes in step St34), that is, when a response indicating that the incoming call is permitted is sent in step St33, the incoming call processing unit 302 instructs the communication control unit 303 to perform incoming call processing. (Step St35). At this time, the communication control unit 303 displays the name “internal / external user” corresponding to the caller source number (“050-00”) on the screen 35 based on the telephone directory DB 330 and outputs a ring tone from the speaker 37. .

  Next, the communication control unit 303 performs a call process with the other mobile phones 3a and 4 (step St36), and ends the process. At this time, the communication control unit 303 converts the voice obtained from the microphone 36 into a voice signal and transmits the voice signal to the extension telephone server 1 via the mobile communication networks # 1 and # 2. Further, the communication control unit 303 reproduces sound from the sound signal received from the extension telephone server 1 via the mobile communication networks # 1 and # 2 and outputs the sound from the speaker 37. In this way, the BYOD 3G mobile phone (# 3) 3b performs incoming processing.

  FIG. 20 is a flowchart showing an example of an incoming call process to a BYOD 3G mobile phone in the extension telephone server. More specifically, FIG. 20 shows an incoming call process in which the telephone number of the BYOD 3G mobile phone (# 3) 3b is the destination number.

  The call control unit 101 determines whether there is an incoming call to the extension number of the BYOD 3G mobile phone (# 3) 3b or the business extension number (050 number) (step St51). If there is no incoming call (No in step St51), the call control unit 101 ends the process.

  When there is an incoming call (Yes in step St51), the call control unit 101 determines the authentication state of the destination 3G mobile phone (# 3) 3b (step St52). When the authentication state is “NG” (No in Step St52), the call control unit 101 transmits a voice message indicating that a response cannot be made to the originating 3G mobile phone (# 1, # 2) 3a or the external mobile phone 4. A message is sent (step St59), and the process ends.

  On the other hand, when the authentication state is “OK” (Yes in step St52), the call control unit 101 calls the calling party to the 3G mobile phone (# 1, # 2) 3a that is the source or the mobile phone 4 outside the company. A voice message to the effect is sent (step St53). Next, the call control unit 101 requests the groupware server 2 to search for the name of the other party (external user, user # 1, user # 2) from the outside line number of the caller (step St54).

  Next, the call control unit 101 transmits a call notification including the name searched by the groupware server 2 to the destination 3G mobile phone (# 3) 3b via the Internet (step St55). Next, the call control unit 101 determines whether or not a response indicating that the incoming call is permitted is received from the destination 3G mobile phone (# 3) 3b via the Internet (step St56). When the call control unit 101 has not received a response (No in step St56), the call control unit 101 performs the process in step St59 described above.

  On the other hand, when receiving a response (Yes in step St56), the call control unit 101 sets the fixed external line number “050-00” as the caller number and the private external line number of the destination 3G mobile phone (# 3) 3b. Call (090 number) (step St57). Next, the call control unit 101 makes a call connection between the originating 3G mobile phone (# 1, # 2) 3a or the external mobile phone 4 and the outgoing / incoming 3G mobile phone (# 3) 3b (step St58). The process is terminated. In this way, the extension telephone server 1 performs an incoming call process.

  As described above, in the call control method according to the embodiment, when a call request is received from the terminal device (3G mobile phone) 3b, the first outside line number ( A call is made to the external line number of another terminal device (external mobile phone) 4 corresponding to the other party of the call, with the business external line number (050 number) as the caller source number. Then, a call is made to the second external number (private external line number (090 number)) of the terminal apparatus 3b using a predetermined external line number (fixed external line number) that is not dependent on the external line number of the other terminal apparatus 4 as a transmission source number. The terminal device 3b and the other terminal device 4 are call-connected based on both calls.

  Further, in the call control method according to the embodiment, when there is an incoming call to the first external line number of the terminal device 3b using the external line number of the other terminal device 4 as the transmission source number, the external line of the other terminal device 4 The other party corresponding to the number is notified to the terminal device 3b. Further, a call is made to the second external line number of the terminal device 3b using a predetermined external number as a transmission source number, and the terminal device 3b and another terminal device 4 are call-connected based on the outgoing call and incoming call.

  According to the above configuration, when a call request is received from the terminal device 3b, the first external line number of the terminal device 3b is notified to the other terminal device 4, but the second external line number is not notified. For this reason, the second external line number of the terminal device 3b is not notified to the owner of the other terminal device 4, and the personal information of the owner of the terminal device 3b is protected. Moreover, since the 1st external line number of the terminal device 3b is notified to the other terminal device 4, the callback from the other terminal device 4 to the terminal device 3b is possible.

  In addition, when there is an incoming call to the first external line number of the terminal device 3b using the external line number of the other terminal device 4 as the transmission source number, the external line number of the other terminal device 4 is notified to the terminal device 3b. Instead, a predetermined outside line number is notified. Therefore, since the external line number of the other terminal device 4 is not recorded in the terminal device 3b, the personal information of the owner of the other terminal device 4 is protected.

  In addition, since the predetermined outside line number is recorded in the call history information 332 of the terminal device 3b regardless of the outside line number of the other terminal device 4, it can be easily distinguished from the private call history. The above convenience is improved. Furthermore, since the predetermined outside line number does not depend on the outside line number of the other terminal device 4, it is not necessary to prepare for each person who is a call target, and the cost for securing the resource of the outside line number is reduced.

  Moreover, according to said structure, the other party's telephone number according to the outside line number of the terminal device 4 is notified to the terminal device 3b. For this reason, it is possible to call back from the terminal device 3b to another terminal device 4 by referring to the notification even though the caller number is a predetermined outside line number that cannot specify the caller.

  Therefore, according to the call control method according to the embodiment, personal information is effectively protected.

  The call control device (extension telephone server) 1 according to the embodiment includes a communication processing unit (first data communication processing unit) 15 and a call control unit 101. The communication processing unit 15 communicates with the terminal device 3b via a network (Internet).

  When the call control unit 101 receives a call request from the terminal device (3G mobile phone) 3b, the call partner designates the first external number (business external number (050 number)) of the terminal device 3b. As a caller number, a call is made to an external line number of another terminal device (external mobile phone) 4 corresponding to the other party. Then, the call control unit 101 uses the predetermined external line number (fixed external line number) that does not depend on the external line number of the other terminal apparatus 4 as the transmission source number, and uses the second external line number (private external line number (090 number) of the terminal apparatus 3b. )), And the terminal device 3b and the other terminal device 4 are call-connected based on both the calls.

  In addition, when there is an incoming call to the first external line number of the terminal device 3b using the external line number of the other terminal device 4 as the transmission source number, the call control unit 101 responds to the external line number of the other terminal device 4 The call partner is notified to the terminal device 3b. The call control unit 101 makes a call to the second external line number of the terminal device 3b using a predetermined external number as a transmission source number, and makes a call connection between the terminal device 3b and another terminal device 4 based on the outgoing call and the incoming call To do.

  Since the call control device 1 according to the embodiment includes the same configuration as that of the call control method according to the embodiment, the same effects as the above-described contents are obtained.

  The call control system according to the embodiment includes a call control device (extension telephone server) 1 and a database device (groupware server) 2. The call control device (extension telephone server) 1 includes a communication processing unit (first data communication processing unit) 15 and a call control unit 101. The communication processing unit 15 communicates with the terminal device 3b via a network (Internet).

  When the communication processing unit 15 receives a call request from the terminal device (3G mobile phone) 3b with a call partner designated, the call control unit 101 receives the first outside line number (business outside line number) of the terminal device 3b. (050 number)) as a caller number, a call is made to an external line number of another terminal device (external mobile phone) 4 that is searched by the database device 2 and corresponds to the other party. Then, the call control unit 101 uses the predetermined external line number (fixed external line number) that does not depend on the external line number of the other terminal apparatus 4 as the transmission source number, and uses the second external line number (private external line number (090 number) of the terminal apparatus 3b. )), And the terminal device 3b and the other terminal device 4 are call-connected based on both the calls.

  In addition, when there is an incoming call to the first external line number of the terminal device 3b using the external line number of the other terminal device 4 as the transmission source number, the call control unit 101 searches the database device 2 for the other The terminal device 3b is notified of the communication partner corresponding to the external line number of the terminal device 4. The call control unit 101 makes a call to the second external line number of the terminal device 3b using a predetermined external number as a transmission source number, and makes a call connection between the terminal device 3b and another terminal device 4 based on the outgoing call and the incoming call To do.

  The database device 2 includes a holding unit 23 and a search processing unit (search unit) 200. The holding unit 23 holds a database (phone book DB) 230 in which the other party's telephone number and the external line numbers of the other terminal devices 4 are registered in association with each other. In response to a request from the call control unit 101, the search unit 200 searches for an external line number of another terminal device 4 corresponding to the call partner or a call partner corresponding to the external line number of the other terminal device 4 based on the database 230. To do.

  Since the call control system according to the embodiment includes the same configuration as that of the call control method according to the embodiment, the same effects as those described above can be obtained.

  The above-described embodiment is an example of a preferred embodiment of the present invention. However, the present invention is not limited to this, and various modifications can be made without departing from the scope of the present invention.

In addition, the following additional notes are disclosed regarding the above description.
(Supplementary note 1) When a call request is received from a terminal device, the other party device corresponding to the other party is used as the caller number with the first external number of the terminal device as the caller number. To the second external line number of the terminal device using a predetermined external number that does not depend on the external line number of the other terminal device as a transmission source number, and the terminal device based on both calls And call connection of the other terminal device,
When there is an incoming call to the first external line number of the terminal device using the external line number of the other terminal device as a caller number, the call partner corresponding to the external line number of the other terminal device is the terminal And the terminal device and the other terminal device based on the outgoing call and the incoming call. A call control method characterized by connecting a call.
(Supplementary Note 2) When there is an incoming call to the first external line number with the external line number of the other terminal device as a transmission source number, the terminal device responds to the external line number of the other terminal device. The call control method according to appendix 1, wherein the call control method confirms whether a call can be received from a call partner and receives a call permission to call the second external line number of the terminal device.
(Supplementary Note 3) A communication processing unit that communicates with a terminal device via a network;
When the communication processing unit receives a call request from the terminal device for which the other party is designated, the first outside line number of the terminal device is used as a caller number, and the other terminal device according to the other party A call is made to the external line number, and a predetermined external line number that does not depend on the external line number of the other terminal device is set as a caller source number, and a call is made to the second external line number of the terminal device. When there is an incoming call to the first external line number of the terminal device, the terminal device and the other terminal device are call-connected, and the external line number of the other terminal device is the source number. Notifying the terminal device of the communication partner according to the external line number of the device, calling the second external line number of the terminal device with the predetermined external line number as a caller number, and making the call and the incoming call Call connection of the terminal device and the other terminal device based on a call The call control apparatus characterized by a control unit.
(Supplementary Note 4) When there is an incoming call to the first external line number, the call control unit uses the external line number of the other terminal apparatus as a source number, and the terminal apparatus has the other terminal apparatus 4. The call control according to appendix 3, wherein whether or not an incoming call from the call partner according to an external line number is confirmed and when the incoming call is permitted, a call is made to the second external line number of the terminal device. apparatus.
(Supplementary Note 5) In a call control system having a call control device and a database device,
The call control device includes:
A communication processing unit that communicates with a terminal device via a network;
When the communication processing unit receives a call request from a terminal device with a call partner specified, the call partner searched by the database device using the first external line number of the terminal device as a caller number A call is made to an external line number of another terminal device according to the above, and a call is made to the second external line number of the terminal device using a predetermined external line number not depending on the external line number of the other terminal device as a source number, Based on both outgoing calls, the terminal device and the other terminal device are call-connected, and the terminal device receives an incoming call to the first external line number, with the external line number of the other terminal device as a source number. If there is, the terminal device is notified of the call partner according to the external line number of the other terminal device searched by the database device, and the predetermined external line number is set as a transmission source number, and the terminal device Call the second external number , And a call control unit for call connection with the terminal device and the other terminal device based on emitting a call and the called,
The database device includes:
A holding unit for holding a database in which external numbers of the other party and the other terminal device are registered in association with each other;
In response to a request from the call control unit, based on the database, a search unit that searches for the external line number of another terminal device corresponding to the call partner or the call partner according to the external line number of the other terminal device; A call control system comprising:
(Supplementary Note 6) When there is an incoming call to the first external line number, the call control unit uses the external line number of the other terminal apparatus as a transmission source number. 6. The call control according to appendix 5, wherein whether or not an incoming call from the call partner according to an external line number is confirmed and when the incoming call is permitted, a call is made to the second external line number of the terminal device. system.

1 Extension telephone server (call control device)
2 Groupware server (database device)
3a 3G mobile phone 3b 3G mobile phone (terminal device)
4 Mobile phones (other terminal devices)
15 First data communication processing unit (communication processing unit)
23 HDD (holder)
101 Call control unit 200 Search processing unit (search unit)
230 Phonebook DB (database)

Claims (4)

When a call request is received from a terminal device, the call partner is designated, and the call is made to the external line number of another terminal device corresponding to the call partner, with the first external line number of the terminal device as the caller number , Calling a second external line number of the terminal device using a predetermined external number that does not depend on the external line number of the other terminal device as a transmission source number, and the terminal device and the other based on both calls Call connection of terminal equipment,
When there is an incoming call to the first external line number of the terminal device using the external line number of the other terminal device as a caller number, the call partner corresponding to the external line number of the other terminal device is the terminal And the terminal device and the other terminal device based on the outgoing call and the incoming call. A call control method characterized by connecting a call.   When there is an incoming call to the first external line number, with the external line number of the other terminal apparatus as a caller number, the terminal apparatus receives the call from the other party according to the external line number of the other terminal apparatus. 2. The call control method according to claim 1, wherein the call control method confirms whether or not an incoming call is accepted and makes a call to the second external line number of the terminal device when the incoming call is permitted. A communication processing unit that communicates with a terminal device via a network;
When the communication processing unit receives a call request from the terminal device for which the other party is designated, the first outside line number of the terminal device is used as a caller number, and the other terminal device according to the other party A call is made to the external line number, and a predetermined external line number that does not depend on the external line number of the other terminal device is set as a caller source number, and a call is made to the second external line number of the terminal device. When there is an incoming call to the first external line number of the terminal device, the terminal device and the other terminal device are call-connected, and the external line number of the other terminal device is the source number. Notifying the terminal device of the communication partner according to the external line number of the device, calling the second external line number of the terminal device with the predetermined external line number as a caller number, and making the call and the incoming call Call connection of the terminal device and the other terminal device based on a call The call control apparatus characterized by a control unit. In a call control system having a call control device and a database device,
The call control device includes:
A communication processing unit that communicates with a terminal device via a network;
When the communication processing unit receives a call request from a terminal device with a call partner specified, the call partner searched by the database device using the first external line number of the terminal device as a caller number A call is made to an external line number of another terminal device according to the above, and a call is made to the second external line number of the terminal device using a predetermined external line number not depending on the external line number of the other terminal device as a source number, Based on both outgoing calls, the terminal device and the other terminal device are call-connected, and the terminal device receives an incoming call to the first external line number, with the external line number of the other terminal device as a source number. If there is, the terminal device is notified of the call partner according to the external line number of the other terminal device searched by the database device, and the predetermined external line number is set as a transmission source number, and the terminal device Call the second external number , And a call control unit for call connection with the terminal device and the other terminal device based on emitting a call and the called,
The database device includes:
A holding unit for holding a database in which external numbers of the other party and the other terminal device are registered in association with each other;
In response to a request from the call control unit, based on the database, a search unit that searches for an external line number of the other terminal device according to the call partner or an external line number of the other terminal device A call control system comprising:

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