JP6161131B2 - Extension telephone system - Google Patents

Description

  The present invention relates to an extension telephone system.

  2. Description of the Related Art In recent years, an extension telephone system that realizes a call between an extension telephone connected to an extension telephone exchange (Private Branch eXchange, PBX) and a telephone connected to an IP (Internet Protocol) network is known. For example, Patent Document 1 describes an extension telephone switching system including a PBX, an extension telephone connected to the PBX, and an INS gateway apparatus installed between the ISDN network and the PBX.

  In this extension telephone exchange system, the extension telephone can make an Internet telephone call by connecting the INS gateway apparatus to the PBX and the Internet network. In this case, the INS gateway device converts the voice signal transmitted from the extension telephone into packet data, and makes an Internet call through the Internet network.

JP 2005-51549 A

  When a plurality of communication carriers provide the extension telephone system shown in Cited Document 1, an extension telephone of a certain communication carrier cannot be connected to the extension telephone of another communication carrier.

  The present invention has been made to solve such a problem, and provides an extension telephone system for connecting the mobile terminals of different mobile communication carriers to each other by extension, thereby improving the convenience of the extension telephone system. And

  An extension telephone system according to the present invention includes a first communication terminal connectable to a first mobile communication network of a first operator, a second communication terminal connectable to a second mobile communication network of a second operator, An extension telephone system for connecting an extension telephone connected to an extension communication line network, wherein the extension telephone system is connected to a first mobile communication network via an IP communication network, and a second mobile communication network of a second operator Connected to the management server, the first communication terminal, the second communication terminal, the storage unit for storing extension number information of the extension telephone, and the management server and connected to the extension communication network A first communication of the first mobile communication network via the IP communication network using the extension number information of the first communication terminal stored in the storage unit. Using the extension number information of the second communication terminal connected to the terminal and stored in the storage unit Voice communication from the extension telephone via the telephone network connected to the second communication terminal of the second mobile communication network.

  In the extension telephone system according to the present invention, the management server acquires the location information of the first and second communication terminals, and uses the extension number information stored in the storage unit from the first and second communication terminals. When connecting with an extension telephone, it is preferable to transmit the acquired location information of the first and second communication terminals to the extension telephone to be connected.

  In the extension telephone system according to the present invention, the connected extension telephone has a map display unit for displaying a map image in which a mark is superimposed and displayed at a position corresponding to the received position information of the first and second communication terminals. Is preferred.

  In the extension telephone system according to the present invention, the position information of the first communication terminal is position information based on a GPS signal received by a GPS receiver included in the first communication terminal, and the position information of the second communication terminal is The position information is preferably based on the GPS signal received by the GPS receiver included in the second communication terminal and the position information received from the wireless communication base station.

  In the extension telephone system according to the present invention, the management server connects the acquired location information of the first and second communication terminals when the telephone communication network is congested or a disaster occurs. It is preferable not to send to.

  In the extension telephone system according to the present invention, the management server is further connected to the second mobile communication network via the second IP communication network, and the management server is connected to the telephone communication network when there is congestion or a disaster. If this occurs, it is preferable to connect the voice communication from the extension telephone to the second communication terminal of the second mobile communication network by replacing the telephone communication network with the IP communication network.

  The extension telephone system according to the present invention provides an extension telephone system that connects the mobile terminals of different mobile communication carriers by extension, thereby improving the convenience of the extension telephone system.

It is a schematic diagram for demonstrating the outline of the extension telephone communication system. 2 is a diagram illustrating an example of a schematic configuration of a mobile terminal 2. FIG. 3 is a diagram illustrating an example of a schematic configuration of a management server 4. FIG. It is a figure which shows an example of the data structure of a telephone directory management table. It is a figure which shows an example of the operation | movement sequence of the extension telephone communication system. It is a figure which shows an example of the operation | movement sequence of the extension telephone communication system. It is a figure which shows an example of the operation | movement sequence of the extension telephone communication system. It is a figure which shows an example of the operation | movement sequence of the extension telephone communication system. (A) is a figure which shows an example of the connection request | requirement screen 900, (b) is a figure which shows an example of the telephone directory search screen 910. FIG. It is a figure which shows an example of the telephone directory search result screen. (A) is a figure which shows an example of the edit screen 1100, (b) is a figure which shows an example of the new registration screen 1110. FIG. 5 is a diagram illustrating an example of a change selection screen 1200. FIG. It is a figure which shows another example of schematic structure of portable terminal 2 '. It is a figure which shows an example of schematic structure of management server 4 '. It is a figure which shows an example of the map display screen 1500. FIG. It is a schematic diagram which shows an example of the extension telephone system 1601a, 1601b, and 1601c for each of a plurality of mobile communication carriers A, B, and C.

  Hereinafter, various embodiments of the present invention will be described with reference to the drawings. However, it should be noted that the technical scope of the present invention is not limited to these embodiments, and extends to the invention described in the claims and equivalents thereof.

  FIG. 16 is a schematic diagram when it is assumed that a plurality of mobile communication carriers A, B, and C have built extension telephone systems 1601a, 1601b, and 1601c, respectively. A company PBX 1612 is installed for each company that uses the extension telephone systems 1601a, 1601b, and 1601c provided by a plurality of mobile communication carriers A, B, and C. The company PBX 1612 is connected to the fixed extension telephone 1613 and is connected to the extension telephone systems 1601a, 1601b and 1601c. The extension telephone systems 1601a, 1601b, and 1601c use portable terminals 1602a, 1602b, and 1602c connected to the mobile communication networks 1607a, 1607b, and 1607c of the respective carriers as extension telephones. The portable terminals 1602a, 1602b and 1602c are connected to the extension telephone systems 1601a, 1601b and 1601c via a base station 1608, an exchange 1609 and an MGW (Media GateWay) 1610 in the mobile communication networks 1607a, 1607b and 1607c.

  The mobile terminals 1602a, 1602b, and 1602c are associated with unique extension numbers. The mobile terminals 1602a, 1602b and 1602c make extension calls with the fixed extension telephone 1613 via the mobile communication networks 1607a, 1607b and 1607c, the extension telephone systems 1601a, 1601b and 1601c, and the company PBX 1612. The portable terminals 1602a, 1602b, and 1602c make extension calls with other portable terminals 1602a, 1602b, and 1602c via the mobile communication networks 1607a, 1607b, and 1607c and the extension telephone systems 1601a, 1601b, and 1601c. With this configuration, the mobile terminal of each mobile communication carrier can be used as an extension telephone by the extension telephone system provided by each mobile communication carrier.

  On the other hand, in the extension telephone system shown in FIG. 16, in a certain company, when mobile terminals of a plurality of mobile communication carriers are used, the mobile terminals of different mobile communication carriers cannot be connected by extension.

  The present invention is an extension telephone system in which mobile terminals of a plurality of mobile communication carriers can be used as extension telephones, and mobile terminals of different mobile communication carriers are connected to each other by extension. A form is demonstrated.

[First Embodiment]
FIG. 1 is a schematic diagram for explaining the outline of the extension telephone communication system 1.

  The extension telephone communication system 1 has an extension telephone system 3 provided by the mobile communication carrier A. The extension telephone system 3 is connected to the company PBX 12 and the fixed extension telephone 13 in the extension communication network 11, and is connected to the mobile communication networks 7a, 7b and 7c of the mobile communication carriers A, B and C. The company PBX 12 and the fixed extension telephone 13 are installed in a company in which the mobile communication carrier A provides the extension telephone system 3. In the mobile communication networks 7a, 7b and 7c, at least one portable terminal 2a, 2b and 2c, a base station 8, an exchange 9 and a gateway 10 are included. The mobile communication networks 7a, 7b and 7c are operated and managed by mobile communication carriers A, B and C, respectively.

  The plurality of portable terminals 2a, 2b, and 2c are terminals having the same configuration. Hereinafter, the mobile terminals 2a, 2b, and 2c may be referred to as mobile terminals 2, respectively. Further, the mobile communication networks 7a, 7b and 7c may be referred to as the mobile communication network 7, respectively.

  A plurality of exchanges 9 are installed for each mobile communication carrier, and are connected to each other via a communication network such as a core network. The exchange 9 connects a wireless communication network covering a certain area to the communication network. A plurality of base stations 8 are connected to the exchange 9 and are installed to manage a plurality of radio zones in the area covered by the radio communication network. The mobile terminal 2 is connected to the exchange 9 via the base station 8 and communicates with the management server 4 such as control signals. The mobile terminal 2 is connected to the gateway 10 via the base station 8 and performs voice communication with the management server 4. The fixed extension telephone 13 is connected to the call processing server 5 via the company PBX 12 and is connected to the management server 4.

  The extension telephone system 3 includes a management server 4, a call processing server 5, and a database 6. The management server 4 includes an authentication process for establishing a connection for communication with the mobile terminal 2, a phone book search process for a phone book search request from the mobile terminal 2 with which the connection has been established, and between the mobile terminals 2 or the mobile terminal. 2 and an extension connection process between the fixed extension telephone 13 and the like. The management server 4 reads a phone book management table stored in the database 6 to be described later in response to a phone book editing request from the personal computer (PC) 14, and adds data to or deletes data from the phone book management table. Or, change the data. The PC 14 is installed in a company in which the mobile communication carrier A provides the extension telephone system 3, and is operated, for example, for the purpose of maintenance of the telephone directory management table by personnel personnel of the company.

  The call processing server 5 executes extension call control and outside line call control using SIP (Session Initiation Protocol) which is a call control protocol. In particular, the extension communication network 11 and the management server 4 are connected to control communication between the fixed extension telephone 13 in the extension communication network 11 and the portable terminals 2b and 2c.

  The database 6 stores user information of users who have subscribed to the extension telephone communication system 1 and stores a telephone directory management table for managing extension telephones of the portable terminal 2. The user information includes a user ID, profile management, authentication information, and current position information for each user. The phone book management table will be described later.

  The management server 4 of the extension telephone system 3 includes a gateway 10 in the mobile communication networks 7b and 7c of the mobile communication carriers B and C different from the mobile communication operator A that manages and operates the extension telephone system 3, and the IP They are connected via the communication network 15. On the other hand, the management server 4 is connected to the gateway 10 in the mobile communication network 7 a of the mobile communication carrier A and the company PBX 12 in the extension communication network 11 via the telephone communication network 16.

  A program (for example, an extension telephone program) executed on the mobile terminal 2 and a program (for example, an authentication program) executed on the management server 4 communicate using a communication protocol such as IPsec (Security Architecture for Internet Protocol). I do. Further, a program (for example, a phone book editing request program) executed on the PC 14 and a program (for example, a phone book editing program) executed on the management server 4 are a hypertext transfer protocol (HTTP) or the like. The communication protocol is used.

  As described above, the mobile terminals 2b and 2c connectable to the mobile communication networks 7b and 7c of the mobile communication carriers B and C, the mobile terminal 2a connectable to the mobile communication network 7a of the mobile communication provider A, and the extension In the extension telephone system 3 for connecting the fixed extension telephone 13 connected to the communication network 11, the mobile communication networks 7b and 7c are connected to each other via the IP communication network 15, and the mobile communication network 7a and the telephone communication network are connected. 16 is connected to the management server 4, the portable terminals 2a, 2b, and 2c, the database 6 that stores the extension number information of the fixed extension telephone 13, and the management server 4 and is connected to the extension communication network 11. The voice communication from the fixed extension telephone 13 via the IP communication network 15 using the extension number information of the portable terminals 2b and 2c stored in the database 6 and having a call processing server 5. 7 , 7c connected to the mobile terminals 2b and 2c, and using the extension number information of the mobile terminal 2a stored in the database 6, voice communication from the fixed extension telephone 13 is made via the telephone communication network 16 to the mobile communication network 7a. By connecting the mobile terminal 2a to the mobile terminal 2a, it is possible to provide an extension telephone system that connects the mobile terminals of different mobile communication carriers to each other, thereby improving the convenience of the extension telephone system.

  FIG. 2 is a diagram illustrating an example of a schematic configuration of the mobile terminal 2.

  The mobile terminal 2 is a communication device that is connected to another mobile terminal 2 or a fixed extension telephone 13 to enable extension calls between users and has a communication function using a wireless LAN. The mobile terminal 2 is, for example, a mobile phone (so-called “feature phone”), a multi-function mobile phone (so-called “smartphone”), a mobile information terminal (Personal Digital Assistant, PDA), a mobile game machine, a mobile music player, a tablet PC, or the like. is there. The mobile terminal 2 connects to the management server 4 and makes a phone book search request for searching for desired information from the phone book management table, and communicates with the mobile server 2 or the fixed extension telephone 13 to the management server 4. Request establishment of Therefore, the mobile terminal 2 includes a first terminal communication unit 21, a second terminal communication unit 22, a terminal storage unit 23, an operation unit 24, a display unit 25, an audio processing unit 26, a microphone 27, A speaker 28 and a terminal processing unit 29 are included.

  The first terminal communication unit 21 has a communication interface circuit including an antenna mainly having a 2.4 GHz band, a 5 GHz band, etc. as a sensitive band, and is adapted to a wireless communication system of the IEEE 802.11 standard with the base station 8. Wireless communication is performed based on this. Then, the first terminal communication unit 21 supplies the data received from the base station 8 to the terminal processing unit 29. In addition, the first terminal communication unit 21 transmits the data supplied from the terminal processing unit 29 to the base station 8.

  The second terminal communication unit 22 includes a communication interface circuit including an antenna whose sensitivity band is mainly 2.1 GHz band, and connects the mobile terminal 2 to the mobile phone network. The second terminal communication unit 22 establishes a radio signal line by a CDMA (Code Division Multiple Access) method or the like with the base station 8 via a channel assigned by the base station 8, and communicates with the base station 8. Communicate. Then, the second terminal communication unit 22 supplies the data received from the base station 8 to the terminal processing unit 29. The second terminal communication unit 22 transmits the data supplied from the terminal processing unit 29 to the base station 8.

  The terminal storage unit 23 includes, for example, a semiconductor memory. The terminal storage unit 23 stores a driver program, an operating system program, an application program, data, and the like used for processing in the terminal processing unit 29. For example, the terminal storage unit 23 is a wireless communication device driver program that controls the first terminal communication unit 21, a mobile phone communication device driver program that controls the second terminal communication unit 22, and an input that controls the operation unit 24 as a driver program. A device driver program, an output device driver program for controlling the display unit 25, the voice processing unit 26, the microphone 27 and the speaker 28, an extension telephone program for realizing various functions of the portable terminal 2 in the extension telephone communication system 1, and the like are stored.

  In addition, the terminal storage unit 23 stores, as an operating system program, a connection control program that executes a wireless communication scheme of the IEEE 802.11 standard, a connection control program for a mobile terminal, and the like. The terminal storage unit 23 also stores, as application programs, a web browser program that acquires and displays web pages, an e-mail program that transmits and receives e-mails, and the like. The computer program is a terminal storage unit using a known setup program or the like from a computer-readable portable recording medium such as a CD-ROM (compact disk read only memory) or a DVD-ROM (digital versatile disk read only memory). 23 may be installed.

  The operation unit 24 may be any device as long as the operation of the mobile terminal 2 is possible. For example, the operation unit 24 is a touch panel type input device, a keypad, or the like. The user can input letters, numbers, and the like using this device. When operated by the user, the operation unit 24 generates a signal corresponding to the operation. The generated signal is input to the terminal processing unit 29 as a user instruction.

  The display unit 25 is an example of an output unit, and may be any device that can output a moving image, a still image, and the like. For example, a touch panel display device, a liquid crystal display, an organic EL (Electro-Luminescence) Display etc. The display unit 25 outputs a moving image corresponding to the moving image data supplied from the terminal processing unit 29, a still image corresponding to the still image data, and the like.

  The audio processing unit 26 performs processing of an audio signal input to the microphone 27 and an audio signal output from the speaker 28.

  The terminal processing unit 29 has one or a plurality of processors and their peripheral circuits. The terminal processing unit 29 controls the overall operation of the mobile terminal 2 and is, for example, a CPU (Central Processing Unit). The terminal processing unit 29 includes a first terminal communication unit 21, so that various processes of the mobile terminal 2 are executed in an appropriate procedure according to a program stored in the terminal storage unit 23, an operation of the operation unit 24, and the like. The operation of the second terminal communication unit 22, the display unit 25, the voice processing unit 26, and the like is controlled. The terminal processing unit 29 executes processing based on programs (driver program, operating system program, application program, etc.) stored in the terminal storage unit 23.

  In particular, the terminal storage unit 23 stores an extension telephone program, and the terminal processing unit 29 reads out and executes the extension telephone program, so that various functions (phone book) of the mobile terminal 2 in the extension telephone communication system 1 are stored. Search, extension connection, etc.). Further, the extension telephone program incorporates the IP address of the management server 4, the common key, and different extension telephone program identification information for each portable terminal 2. Note that the terminal processing unit 29 can execute a plurality of programs (such as application programs) in parallel.

  The terminal processing unit 29 includes a browsing execution unit 291, a request transmission unit 292, and an encryption processing unit 293. Each of these units included in the terminal processing unit 29 is a functional module implemented by a program executed on a processor included in the terminal processing unit 29. Alternatively, these units included in the terminal processing unit 29 may be mounted on the portable terminal 2 as independent integrated circuits, microprocessors, or firmware.

  FIG. 3 is a diagram illustrating an example of a schematic configuration of the management server 4.

  The management server 4 is an example of a computer that executes control and management of the extension telephone system 3. The management server 4 includes an authentication process for establishing a connection for communication with the mobile terminal 2, a phone book search process for a phone book search request from the mobile terminal 2 with which the connection has been established, and between the mobile terminals 2 or the mobile terminal. 2 and the process of connecting the extension between the fixed extension telephone 13 and the like. For this purpose, the management server 4 includes a telephone communication network connection unit 41, an IP network connection unit 42, a storage unit 43, a processing unit 44, and a communication control unit 45.

  The telephone communication network connection unit 41 includes a communication interface circuit for connecting the management server 4 to the telephone communication network 16. The telephone communication network connection unit 41 receives an audio signal transmitted from the mobile terminal 2a via the mobile communication network 7a and the telephone communication network 16, and receives the voice signal transmitted from the mobile terminal 2a via the telephone communication network 16 and the mobile communication network 7a. Send an audio signal to In addition, voice signals are transmitted to and received from the fixed extension telephone 13 via the company PBX 12 and the telephone communication network 16.

  The IP network connection unit 42 includes a communication interface circuit for connecting the management server 4 to the IP communication network 15. The IP network connection unit 42 receives voice packets transmitted from the mobile terminals 2b and 2c via the mobile communication networks 7b and 7c and the IP communication network 15, and connects the IP communication network 15 and the mobile communication networks 7b and 7c. Voice packets are transmitted to the mobile terminals 2b and 2c. Further, the data received from the portable terminals 2a, 2b and 2c and the PC 14 via the IP communication network 15 is transferred to the processing unit 44 (the IP communication network between the portable terminal 2a and the management server 4 is not shown). . The IP network connection unit 42 transmits the data received from the processing unit 44 to the portable terminals 2a, 2b and 2c and the PC 14 via the IP communication network.

  The storage unit 43 includes, for example, at least one of a semiconductor memory, a magnetic disk device, and an optical disk device. The storage unit 43 stores application programs, data, and the like used for processing in the processing unit 44. Further, the storage unit 43 may temporarily store temporary data related to a predetermined process.

  The processing unit 44 includes one or a plurality of processors and their peripheral circuits. The processing unit 44 is a processing unit, for example, a CPU that comprehensively controls the overall operation of the management server 4. That is, the processing unit 44 controls the operation of the IP network connection unit 42 and the like so that various types of processing of the management server 4 are executed in an appropriate procedure according to software stored in the storage unit 43. The processing unit 44 executes processing based on a program (operating system program, application program, etc.) stored in the storage unit 43. The processing unit 44 can execute a plurality of programs (application programs, software, etc.) in parallel.

  The processing unit 44 includes a control unit 441, a connection request processing unit 442, a telephone directory search unit 443, and an extension connection unit 444. Each of these units included in the processing unit 44 is a functional module implemented by an application program executed on a processor included in the processing unit 44. Alternatively, these units included in the processing unit 44 may be implemented in the management server 4 as firmware.

  The communication control unit 45 has one or a plurality of processors and their peripheral circuits. The communication control unit 45 may be a CPU or a hardware module that controls a voice signal transmitted / received via the telephone communication network connection unit 41 and a voice packet transmitted / received via the IP network connection unit 42.

  The communication control unit 45 includes an audio conversion unit 451 and a connection destination control unit 452. The voice conversion unit 451 converts the voice signal received via the telephone communication network connection unit 41 into a voice packet when transmitted via the IP communication network 15 and receives the voice signal via the IP network connection unit 42. When the voice packet is transmitted via the telephone communication network connection unit 41, the voice packet is converted into a voice signal.

  In the extension connection processing described later, the connection destination control unit 452 determines whether the called device is one of the mobile terminals 2a, 2b and 2c and the fixed extension telephone 13 based on the connection request. Performs processing to connect to the call side device.

  Details of the telephone directory management table shown in FIG. 4 will be described below.

  FIG. 4 is a diagram showing an example of the data structure of the telephone directory management table stored in the database 6. In the telephone book management table, the user ID, extension number, head office / branch office, affiliation, name, and external line telephone number are stored in association with each other for each portable terminal 2.

  The user ID is identification information for uniquely identifying a user who owns each mobile terminal. The extension number is an extension telephone number corresponding to each mobile terminal 2 used in the extension telephone communication system 1. The head office / branch is identification information for identifying a head office, a branch, a branch, a group company, or the like to which the user belongs in a company that uses the extension telephone communication system 1. Affiliation is identification information for identifying an organization to which a user belongs in a company that uses the extension telephone communication system 1. For example, in the case of the head office, this identification information includes identification information for identifying the management headquarters, the sales headquarters, the planning headquarters, the development headquarters, etc., and identifies departments (sections and staffs) that subdivide each headquarters Identification information may be included. The name is the name of the user. The external telephone number is an external telephone number corresponding to each mobile terminal 2.

  FIG. 5 is a diagram showing an example of an operation sequence of the extension telephone communication system 1. The operation sequence shown in FIG. 5 is an example of a connection process between the mobile terminal 2 and the management server 4 and a telephone directory search process.

  The operation sequence described below is executed in the portable terminal 2 and the management server 4 in cooperation with each element of each device mainly by the control unit of each device based on a program stored in the storage unit of each device in advance. Is done.

  First, the browsing execution unit 291 of the mobile terminal 2 displays a connection request screen on the display unit 25 in accordance with an instruction from the user of the mobile terminal 2 (step S101). The display process of the connection request screen is executed by the processor when the processor of the terminal processing unit 29 reads the extension telephone program stored in the terminal storage unit 23.

  Here, the connection request screen 900 shown in FIG. 9A will be described. On the connection request screen 900, a connection request button 901 for requesting connection to the management server 4 of the extension telephone system 3 is displayed.

  Returning to the description of FIG. 5, when the connection request button 901 is specified by the user operation via the operation unit 24 of the portable terminal 2, the request transmission unit 292 is managed via the first terminal communication unit 21. A connection request is transmitted to the server 4 (step S102). When the processor of the terminal processing unit 29 executes the extension telephone program, the request transmission unit 292 acquires the IP address and extension telephone program identification information of the management server 4 from the extension telephone program. The request transmission unit 292 transmits a connection request including the external telephone number, password, and extension telephone program identification information of the mobile terminal 2 to the management server 4 based on the acquired IP address.

  The connection request processing unit 442 of the management server 4 receives a connection request from the mobile terminal 2 via the IP network connection unit 42. When the connection request processing unit 442 receives the connection request, the connection request processing unit 442 acquires the external telephone number, password, and extension telephone program identification information included in the connection request. Then, the connection request processing unit 442 transmits an authentication request including the acquired external telephone number, password, and extension telephone program identification information to the database 6 (step S103).

  In the database 6, if the external telephone number and the password included in the authentication request are stored in association with each other and the extension telephone program identification information is recorded, the certificate including the external telephone number Is created (step S104). The database 6 transmits the created certificate to the management server 4 (step S105).

  When receiving the certificate from the database 6, the connection request processing unit 442 of the management server 4 transmits the certificate including the key to the mobile terminal 2 that has transmitted the connection request via the IP network connection unit 42 (step S106). ).

  When the encryption processing unit 293 of the mobile terminal 2 receives the certificate from the management server 4 via the first terminal communication unit 21, the encryption processing unit 293 acquires a common key embedded in the extension telephone program stored in the terminal storage unit 23. . The encryption processing unit 293 encrypts the key included in the certificate using the acquired common key (step S107).

  The encryption processing unit 293 transmits the encrypted key to the management server 4 via the first terminal communication unit 21 (step S108).

  When the connection request processing unit 442 of the management server 4 receives the encrypted key, the connection request processing unit 442 decrypts the key using the common key stored in the storage unit 43 and determines whether or not the key is true. To do. If the key is true, the connection request processing unit 442 determines that the authentication is successful, and establishes communication (virtual path) between the mobile terminal 2 and the management server 4 (step S109). Thereafter, in the communication between the portable terminal 2 and the management server 4, tunneling is performed on the entire IP packet, and a new IP header is added and transmitted. At that time, the entire IP packet is encrypted with the common key.

  When communication is established, the browsing execution unit 291 of the terminal device 2 displays a telephone directory search screen on the display unit 25 (step S110). Here, the telephone directory search screen 910 shown in FIG. 9B will be described. On the telephone directory search screen 910, a communication establishment display 911, a communication establishment mark 912, a key part 913, a search text box 914, and a search start button 915 are displayed.

  The communication establishment display 911 is a display indicating that communication has been established, and is displayed at the position of the connection request button 901 displayed on the connection request screen 900. The communication establishment mark 912 is a mark indicating that communication has been established, similarly to the communication establishment display 911. The key portion 913 includes keys on which 1 to 9, *, 0 (zero), and # are displayed. In response to designation of each key of the key unit 913 via the operation unit 24 by a user operation, a character string corresponding to each key is input. As the correspondence between each key of the key unit 913 and the character string, a known correspondence is used in a mobile phone, a multi-function mobile phone, and the like.

  In the search text box 914, a character string input in response to each key of the key unit 913 being designated by the user operation via the operation unit 24 is displayed. A search start button 915 is displayed at the right end in the search text box 914. When a search start button 915 is pressed through the operation unit 24 by a user operation, a search using a character string input to the search text box 914 is started.

  Returning to the description of FIG. 5, when a character string is input to the search text box 914 and the search start button 915 is pressed by a user operation, the browsing execution unit 291 of the mobile terminal 2 is changed to the first terminal communication unit. A search request is transmitted to the management server 4 via 21 (step S111). The search request includes the character string input to the search text box 914 when the search start button 915 is pressed.

  When receiving the search request via the IP network connection unit 42, the telephone directory search unit 443 of the management server 4 transmits the database search request together with the character string included in the search request to the database 6 (step S112). The database 6 searches for a name, a user ID, and an extension number corresponding to the received character string in accordance with the received database search request (step S113). The database 6 transmits the user ID and name as a search result to the management server 4 (step S114). The transmission of the search request and the reception of the search result performed by the telephone directory search unit 443 of the management server 4 are executed using LDAP (Lightweight Directory Access Protocol) which is a protocol for accessing the directory service.

  When receiving the search result via the IP network connection unit 42, the telephone directory search unit 443 of the management server 4 transmits the received search result to the mobile terminal 2 that has transmitted the search request (step S115).

  The browsing execution unit 291 of the mobile terminal 2 receives the search result from the management server 4 via the first terminal communication unit 21, and displays the phone book search result screen on the display unit 25 based on the received search result (step 25). S116). Here, the telephone directory search result screen 1000 shown in FIG. 10 will be described. On the phone book search result screen 1000, a search text box 1001 and a search result 1002 are displayed. When any one of the search results 1002 is specified by the user via the operation unit 24, the user's mobile terminal 2 and the mobile terminal 2 or the fixed extension telephone 13 corresponding to the specified search result 1002 are connected by extension. Is done.

  The search text box 1001 is the same display as the search text box 914 displayed on the phone book search screen 910. The search result 1002 displays the name received as the search result by the browsing execution unit 291.

  The mobile terminal 2 storing the extension telephone program can be connected to an extension management system managed and operated by a different mobile communication carrier by the connection process between the mobile terminal 2 and the management server 4 described above. Further, the mobile terminal 2 does not need to store the telephone directory management table in the terminal storage unit 23 by the above-described telephone directory search process, and prevents information leakage of the telephone directory management table due to the loss of the mobile terminal 2 in advance. be able to.

  FIG. 6 is a diagram showing an example of an operation sequence of the extension telephone communication system 1. The operation sequence illustrated in FIG. 6 is an example of an extension connection process between the mobile terminal 2 and another mobile terminal 2.

  The operation sequence described below is executed in the portable terminal 2 and the management server 4 in cooperation with each element of each device mainly by the control unit of each device based on a program stored in the storage unit of each device in advance. Is done.

  First, the browsing execution unit 291 of the mobile terminal 2 displays a phone book search result screen on the display unit 25 (step S201). This step S201 is the same processing as step S116 in the sequence diagram shown in FIG.

  When any one of the search results 1002 displayed on the phone book search result screen 1000 shown in FIG. 10 is designated, the browsing execution unit 291 of the mobile terminal 2 sends an extension connection request via the first terminal communication unit 21. To the management server 4 (step S202). The extension connection request includes the user ID corresponding to the specified name and the external telephone number of the portable terminal 2.

  When receiving the extension connection request from the portable terminal 2 via the IP network connection unit 42, the extension connection unit 444 of the management server transmits a connection destination search request including the user ID included in the extension connection request to the database 6 (step S40). S203).

  The database 6 acquires an extension number as a search result from the telephone directory management table based on the user ID included in the connection destination search request received from the management server 4 (step S204). The database 6 transmits the extension number acquired as a search result to the management server 4 (step S205).

  The extension connection unit 444 of the management server 4 transmits a connection request for extension connection with the portable terminal 2 that has transmitted the extension connection request to the other portable terminal 2 corresponding to the acquired extension number (step S206). When the connection is approved from the other portable terminal 2, the portable terminal 2 and the other portable terminal 2 are connected by extension (step S207). When the extension connection is terminated, a connection termination (release request) is transmitted (step S208).

  In the extension connection process between the mobile terminal 2 and the other mobile terminal 2 described above, when both the calling-side mobile terminal 2 and the called-side mobile terminal 2 are the mobile terminals 2a, the connection destination control unit 452 The mobile communication network 7a and the management server 4 are connected by extension via the telephone communication network 16. When either or both of the calling-side mobile terminal 2 and the called-side mobile terminal 2 are the mobile terminals 2b or 2c, the connection destination control unit 452 is connected to the mobile communication network 7b or 7c. Are connected to the management server 4 via the IP communication network. As described above, the extension call between the mobile terminals 2a of the mobile communication carrier A that provides the extension telephone system 3 uses the telephone communication network 16, so that the voice quality can be maintained.

  Although the voice quality is lower than that of the telephone communication network 16 by the extension connection process described above, the mobile terminal 2a can be connected to the mobile terminals 2b and 2c of the other mobile communication carriers B and C. Further, the extension telephone system 3 operated and managed by the mobile communication company A enables extension connection between the mobile terminals 2b and 2c of the other mobile communication companies B and C.

  FIG. 7 is a diagram showing an example of an operation sequence of the extension telephone communication system 1. The operation sequence shown in FIG. 7 is an example of an extension connection process between the mobile terminal 2 and the fixed extension telephone 13.

  The operation sequence described below is executed in the portable terminal 2 and the management server 4 in cooperation with each element of each device mainly by the control unit of each device based on a program stored in the storage unit of each device in advance. Is done.

  Steps S301 to S305 of the operation sequence shown in FIG. 7 are the same as steps S201 to S205 of the operation sequence shown in FIG.

  When the extension number acquired as a search result in step S305 corresponds to the fixed extension telephone 13, the extension connection unit 444 of the management server 4 transmits a connection request for the extension connection to the fixed extension telephone 13 to the company PBX 12 together with the extension number. (Step S306). The company PBX 12 transmits the received connection request to the fixed extension telephone 13 corresponding to the received extension number (step S307).

  If the connection is approved from the fixed extension telephone 13, the portable terminal 2 and the fixed extension telephone 13 are connected by extension (step S308). When the extension connection is completed, a connection termination (release request) is transmitted (step S309).

  In the extension connection process between the mobile terminal 2 and the fixed extension telephone 13 described above, when the mobile terminal 2 on the calling side is the mobile terminal 2a, the connection destination control unit 452 includes the mobile communication network 7a, the management server 4, and Are connected to each other via the telephone communication network 16. Further, when the calling-side mobile terminal 2 is the mobile terminal 2b or 2c, the connection destination control unit 452 connects the mobile communication network 7b or 7c and the management server 4 by extension via the IP communication network. As described above, since the extension communication between the mobile terminal 2a of the mobile communication carrier A that provides the extension telephone system 3 and the fixed extension telephone 13 uses the telephone communication network 16, the voice quality can be maintained. In addition, although the voice quality is lower than that of the telephone communication network 16 by the extension connection process described above, the fixed extension telephone 13 can be connected to the mobile terminals 2b and 2c of the other mobile communication carriers B and C. .

  When the fixed extension telephone 13 makes a call, it is connected to the management server 4 via the company PBX 12 based on the extension telephone information stored in the memory (not shown) of the fixed extension telephone 13, and the above-described step S303. To S305 are executed. When the called terminal corresponding to the extension number is the mobile terminal 2, steps S206 to S208 in FIG. 6 are executed. If the called terminal corresponding to the extension number is the fixed extension telephone 13, the above steps S306 to S309 are executed.

  FIG. 8 is a diagram showing an example of an operation sequence of the extension telephone communication system 1. The operation sequence shown in FIG. 8 is an example of a phone book editing process by the PC 14 and the management server 4.

  The operation sequence described below is executed in the PC 14 and the management server 4 in cooperation with each element of each device mainly by the control unit of each device based on a program stored in advance in the storage unit of each device. .

  The PC 14 transmits an edit screen request to the management server 4 in response to a user operation instruction (step S401). When receiving the edit screen request from the PC 14 via the IP network connection unit 42, the management server 4 transmits edit screen display data for displaying the edit screen to the PC 14 (step S402). When the PC 14 receives the edit screen display data from the management server 4, the PC 14 displays the edit screen on a display unit (not shown).

  Here, the editing screen 1100 shown in FIG. On the edit screen 1100, a new registration button 1101, a registration change button 1102, and a registration deletion button 1103 are displayed. When a new registration button 1101 is pressed according to a user's designation operation, a new registration screen 1110 shown in FIG. 11B is displayed. When the registration change button 1102 is specified in accordance with a user specifying operation, a change selection screen 1200 shown in FIG. 12 is displayed. When the registration deletion button 1103 is specified in accordance with a user specifying operation, a deletion selection screen (not shown) is displayed.

  Display data for displaying the new registration screen 1110, display data for displaying the change selection screen 1200, and display data for displaying the deletion selection screen may be included in the edit screen display data. These display data may be requested to the management server 4 by pressing a new registration button 1101, a registration change button 1102, and a registration deletion button 1103 in accordance with a user's designation operation.

  A new registration screen 1110 shown in FIG. 11B includes a drop-down menu 1111 for selecting a head office / branch, a drop-down menu 1112 for selecting a affiliation, a name text box 1113 for entering a name, and an extension. An extension number text box 1114 for entering a number, an outside number text box 1115 for entering an outside line telephone number, a registration button 1116 and a cancel button 1117 are displayed.

  In the drop-down menu 1111, a name such as a head office, a branch office, a branch office, or a group company in a company that uses the extension telephone communication system 1 is displayed. The drop-down menu 1112 displays an organization name for each head office, branch office, branch office, or group company in a company that uses the extension telephone communication system 1. A name text box 1113, an extension number text box 1114, and an outside number text box 1115 are displayed so that a name, an extension number, and an outside telephone number can be input, respectively.

  When the registration button 1116 is pressed according to a user operation instruction, the items selected in the drop-down menu 1111 and the drop-down menu 1112, the name text box 1113, the extension number text box 1114, and the outside number text box 1115 are displayed. A phone book edit request including the item input in is sent to the management server 4.

  The change selection screen 1200 shown in FIG. 12 includes a user selection unit 1201 that displays the name of the user whose registration content is to be changed, a selection cursor 1202 that selects one user from the users in the user selection unit 1201, and a selection A button 1203 is displayed. The user selection unit 120 displays the names of all users included in the telephone directory management table stored in the database 6. One of the users displayed by the user selection unit 120 can be selected by the selection cursor 1202. When a user is selected by the selection cursor 1202 and the selection button 1203 is pressed by a user's specifying operation, a new registration screen 1110 in FIG. 11B is displayed. In this case, the screen title of the new registration screen 1110 is changed from “new phone book registration” to “change phone book” and displayed.

  On the displayed new registration screen 1110, a drop-down menu 1111 for selecting a head office / branch, a drop-down menu 1112 for selecting a affiliation, a name text box 1113 for entering a name, and an extension number are entered. In the extension number text box 1114 and the outside line number text box 1115 for inputting an outside line telephone number, information of the selected user is displayed. When the registration content is changed by the user's selection or / and input operation, and the registration button 1116 is pressed according to the user's operation instruction, the phone book edit request including the selected / input item is managed. It is transmitted to the server 4.

  The deletion selection screen is the same screen as the change selection screen 1200 shown in FIG. 12, and the screen title “Change phone book” is changed to “Delete from phone book” and displayed. When a user is selected by the selection cursor 1202 and the selection button 1203 is pressed by a user's designation operation, a phone book editing request including the user ID of the user selected as a deletion target is transmitted to the management server 4.

  As described above, when the PC 14 sends a phone book edit request to the management server 4 (step S404), the management server 4 receives the phone book edit request and sends the received phone book edit request to the database 6 (step S404). S405). The database 6 edits the database 6 based on the received phone book edit request and various information included in the phone book edit request (step S406).

  The database 6 transmits the edited result to the management server 4 (step S407), and the management server 4 transmits the editing result screen display data including the received editing result to the PC 14 (step S408). The PC 14 displays an editing result screen on the display unit based on the received editing result display data.

  By the telephone book editing process by the PC 14 and the management server 4 described above, the user of the extension telephone communication system 1 does not need to revise the telephone book management table by himself / herself, and the personnel management department of the company that uses the extension telephone communication system 1 Can manage the phone book table.

[Second Embodiment]
In the second embodiment, the mobile terminal 2 ′ has a function of receiving its own location information and transmitting the received location information to the management server 4 ′. The other mobile terminal 2 ′ and the fixed extension telephone 13 ′ that are connected to the mobile terminal 2 ′ by extension can display the location information of the mobile terminal 2 ′ transmitted from the management server 4 ′.

  FIG. 13 is a diagram illustrating an example of a schematic configuration of a mobile terminal 2 ′ having a function of receiving its own location information and transmitting the received location information to the management server 4 ′. In FIG. 13, the same components as those of the portable terminal 2 shown in FIG.

  The portable terminal 2 'further includes a position information receiving unit 30' in addition to the units shown in FIG. The position information receiving unit 27 ′ has a GPS receiver that receives position information of the portable terminal 2 ′ based on a signal received from the navigation satellite.

  The terminal processing unit 29 ′ includes a position information transmission unit 294 ′ in addition to the units included in the terminal processing unit 29 illustrated in FIG. 2. The position information transmitting unit 294 ′ transmits the position information received by the position information receiving unit 30 ′ to the management server 4 ′.

  FIG. 14 is a diagram illustrating an example of a schematic configuration of the management server 4 ′ that receives position information from the mobile terminal 2 ′. In FIG. 14, the same components as those of the management server 4 shown in FIG.

  The processing unit 44 ′ of the management server 4 ′ further includes a location information management unit 445 ′ and a map information providing unit 446 ′ in addition to the units shown in FIG. 3. The location information management unit 445 ′ acquires the location information of the mobile terminal 2 ′ received from the mobile terminal 2 ′ via the IP network connection unit 42. Further, the location information management unit 445 ′ acquires the location information of the mobile terminal 2 ′ a calculated based on the location information received from the plurality of base stations 8. The position information management unit 445 ′ uses the position information of the portable terminal 2′a as both the position information received from the portable terminal 2′a and the position information calculated based on the position information received from the plurality of base stations 8. Calculate based on information. In addition, since management server 4 'cannot acquire positional information from another mobile communication provider, the positional information on portable terminal 2'b and 2'c is the positional information received from portable terminal 2'b and 2'c. is there.

  The position information management unit 445 ′ transmits the position information of the mobile terminal 2 ′ to the database 6, and the database 6 stores the received position information in association with the extension information of the mobile terminal 2 ′.

  When the mobile terminal 2 ′ or the fixed extension telephone 13 ′ is connected to another mobile terminal 2 ′, the map information providing unit 446 ′ of the management server 4 ′ has a mark indicating the position information of the other mobile terminal 2 ′. The superimposed map information is transmitted to the mobile terminal 2 ′ or the fixed extension telephone 13 ′ connected to the other mobile terminal 2 ′. That is, the map information providing unit 446 ′ receives the position information of the other portable terminal 2 ′ from the database 6, creates map information in which a mark indicating the received position information is superimposed on the map image, and creates the created map Send information.

  As the map image, a map image stored in the storage unit 43 of the management server 4 ′ may be used, or a map image of an external Web (World Wide Web) map site may be acquired. Further, the timing at which the map information providing unit 446 ′ transmits the map information may be performed according to the user's operation of the mobile terminal 2 ′ in addition to the case of extension connection. In that case, it is possible to designate the mobile terminal 2 'whose position is to be known.

  FIG. 15 shows a map in which a mark indicating position information of another mobile terminal 2 ′ is superimposed on a map image when the mobile terminal 2 ′ or the fixed extension telephone 13 ′ is connected to the other mobile terminal 2 ′ by extension. It is an example of the map display screen 1500 which displayed information.

  On the map display screen 1500, an extension connection destination information display 1501 for displaying the user of the other mobile terminal 2 ′ of the extension connection destination, a mark 1503 indicating the position information of the map image 1502 and the other mobile terminal 2 ′ of the extension connection destination. Is displayed.

  When the other mobile terminal 2 ′ is the mobile terminal of the mobile communication carrier A, the mark 1503 based on the high-accuracy position information is superimposed and displayed on the map image, and the other mobile terminal 2 ′ In the case of the business operators B and C, the position information based on the GPS signal is superimposed and displayed on the map image.

  In the second embodiment, the other mobile terminal 2 ′ transmits its own location information to the management server 4 ′, and the mobile terminal 2 ′ and the fixed extension telephone 13 ′ connected to the other mobile terminal 2 ′ by extension are managed by Since the location information of the other mobile terminal 2 ′ received from the server 4 ′ can be displayed, when an extension call is made with an employee who owns the other mobile terminal 2 ′, the location of the employee can be confirmed. A very useful extension telephone system can be provided. Note that the location information is notified when the extension connection is made with the other mobile terminal 2 ′, but the display of the location information is not permitted when the outside call is made with the other mobile terminal 2 ′ or the fixed telephone. With this configuration, it is possible to share location information in a call between employees and prevent location information from leaking out in a call with a non-employee.

  As described above, the extension telephone system 3 includes the mobile terminals 2b and 2c that can be connected to the mobile communication networks 7b and 7c of the mobile communication carriers B and C, and the mobile communication network 7a of the mobile communication operator A. The connectable portable terminal 2a is connected to the fixed extension telephone 13 connected to the extension communication network 11, and the management server 4 is connected to the mobile communication networks 7b and 7c via the IP communication network 15 and moved. The database 6 stores the extension number information of the mobile terminals 2a, 2b and 2c and the fixed extension telephone 13, and the call processing server 5 is connected to the management server 4 Is connected to the extension communication network 11, and voice communication from the fixed extension telephone 13 is performed via the IP communication network 15 using the extension number information of the portable terminals 2 b and 2 c stored in the database 6. Transfer Connect to the mobile terminals 2b and 2c of the body communication networks 7b and 7c, and move the voice communication from the fixed extension telephone 13 through the telephone communication network 16 using the extension number information of the mobile terminal 2a stored in the database 6 It connects with the portable terminal 2a of the body communication network 7a. Accordingly, it is possible to provide an extension telephone system that connects the mobile terminals of different mobile communication carriers to each other, thereby improving the convenience of the extension telephone system.

  Note that the present invention is not limited to this embodiment. For example, the mobile communication network 7a and the management server 4 are connected via the IP network in addition to the telephone communication network 16, and one of the telephone communication network 16 and the IP network is used according to a predetermined condition. You may control to perform the extension connection from the portable terminal 2a.

  For example, when the telephone communication network is congested and / or when emergency disaster information such as an earthquake early warning is transmitted, the extension connection unit 444 is controlled to make an extension connection via the IP communication network. May be. By performing such a restriction, it is possible to prevent a significant increase in load on the management server 4 and the telephone communication network.

  Further, the map information providing unit 446 ′ of the management server 4 ′ transmits the map information when the telephone communication network is congested and / or when emergency disaster information such as an earthquake early warning is transmitted. You may control not to perform. By performing such a restriction, it is possible to prevent a significant increase in load on the management server 4 and the IP network.

  It should be understood by those skilled in the art that various changes, substitutions and modifications can be made thereto without departing from the spirit and scope of the present invention.

1 Extension telephone communication system 1
2, 2 'mobile terminal 3 extension telephone system 4, 4' management server 5 call processing server 6 database 7 mobile communication network 8 base station 9 exchange 10 gateway 11 extension communication network 12 company PBX
13, 13 'fixed extension telephone 14 personal computer (PC)
15 IP communication network 16 Telephone communication network

Claims (4)

A first communication terminal connectable to the first mobile communication network of the first operator, a second communication terminal connectable to the second mobile communication network of the second operator, and an extension connected to the extension communication line network An extension telephone system for connecting to a telephone,
A management server connected to the first mobile communication network via the IP communication network and connected to the second mobile communication network of the second operator via the telephone communication network;
A storage unit that stores extension number information of the first communication terminal, the second communication terminal, and the extension telephone;
A call processing server connected to the management server and connected to the extension communication network,
Using the extension number information of the first communication terminal stored in the storage unit, voice communication from the extension telephone is connected to the first communication terminal of the first mobile communication network via the IP communication network,
Using the extension number information of the second communication terminal stored in the storage unit, voice communication from the extension telephone is connected to the second communication terminal of the second mobile communication network via the telephone communication network,
The management server
Obtaining position information of the first communication terminal based on a GPS signal received by a GPS receiver included in the first communication terminal;
Obtaining position information of the second communication terminal based on a GPS signal received by a GPS receiver included in the second communication terminal and position information received from a wireless communication base station;
When connecting to an extension telephone from the first communication terminal and the second communication terminal using the extension number information stored in the storage unit, the acquired location information of the first communication terminal and the second communication terminal Send location information to the connected extension phone,
An extension telephone system characterized by this. A first communication terminal connectable to the first mobile communication network of the first operator, a second communication terminal connectable to the second mobile communication network of the second operator, and an extension connected to the extension communication line network An extension telephone system for connecting to a telephone,
A management server connected to the first mobile communication network via the IP communication network and connected to the second mobile communication network of the second operator via the telephone communication network;
A storage unit that stores extension number information of the first communication terminal, the second communication terminal, and the extension telephone;
A call processing server connected to the management server and connected to the extension communication network,
The management server
Obtaining position information of the first communication terminal and position information of the second communication terminal;
Using the extension number information of the first communication terminal stored in the storage unit, voice communication from the extension telephone is connected to the first communication terminal of the first mobile communication network via the IP communication network, and the acquisition is performed. Transmitting the location information of the first communication terminal to the extension telephone to be connected ,
Using the extension number information of the second communication terminal stored in the storage unit, the voice communication from the extension telephone is connected to the second communication terminal of the second mobile communication network via the telephone communication network, and the acquisition is performed. Transmitting the location information of the second communication terminal to the connected extension telephone ,
When the telephone communication network is congested or when a disaster occurs, the acquired location information of the first communication terminal and the location information of the second communication terminal are not transmitted to the connected extension phone.
An extension telephone system characterized by this. The management server is further connected to a second mobile communication network via a second IP communication network,
When the telephone communication network is congested or a disaster occurs, the management server replaces the telephone communication network with an IP communication network and performs voice communication from the extension telephone of the second mobile communication network. The extension telephone system according to claim 1, wherein the extension telephone system is connected to the second communication terminal. The extension telephone to be connected is
The extension telephone according to any one of claims 1 to 3, further comprising a map display unit that displays a map image in which a mark is superimposed and displayed at a position corresponding to the transmitted position information of the first and second communication terminals. system.