WO2015125680A1

WO2015125680A1 - Pbx cooperation system, pbx cooperation method, subscriber registration device, and subscriber registration program

Info

Publication number: WO2015125680A1
Application number: PCT/JP2015/053756
Authority: WO
Inventors: 小田部　悟士; 哲郎小向; 克啓瀬林; 寿和坂野
Original assignee: 日本電信電話株式会社
Priority date: 2014-02-18
Filing date: 2015-02-12
Publication date: 2015-08-27
Also published as: JP5856633B2; JP2015154380A

Abstract

A subscriber registration server (16) (registration server) notifies another registration server (16) paired with another PBX server (11) within an area in which an IP-PBX server (11) paired therewith is included that a phone terminal has been registered, and when the notification has been given from the other registration server (16) paired with the other PBX server (11) within the area, writes the registration of the phone terminal in a subscriber database of the registration server (16). When receiving a call connection request with a phone terminal not housed therein as an outgoing call destination, the PBX server (11) inquires of the registration server (16) paired therewith, and instructs another PBX server (11) in which the phone terminal specified as the outgoing call destination is housed to call the phone terminal as the outgoing call destination.

Description

PBX linkage system, PBX linkage method, subscriber registration device, and subscriber registration program

The present invention provides a plurality of bases in a disaster-stricken area in order to provide a temporary telephone service using a mobile terminal such as a smartphone that has been used in a disaster-stricken area where a telephone is unavailable due to a large-scale disaster or the like. The present invention relates to a technology that uses a PBX (Private Branch eXchange) device (private branch exchange) installed in a temporary PBX system.

Mobile phones such as smartphones that have been used in the past by temporarily installing a temporary PBX system that supports wireless LAN (Local Area Network) in the disaster areas where telephones were unavailable due to large-scale disasters, etc. It has been considered to provide a temporary telephone service using the Internet. When a method of using a conventional PBX system as a temporary PBX system and linking a plurality of bases is adopted, a prefix (head number) is designated when making a call to each base (for example, see Non-Patent Document 1). For example, for the Tokyo office, if the prefix is determined to be 3 and the extension number of the Tokyo office is dialed after 3, then the extension terminal of the Tokyo office can be called. For the Osaka office, set the prefix to 6.

In the above-described method, it is assumed that each user can refer to the telephone number table of all offices. Specifically, it is assumed that an engineer with specialized knowledge registers all telephone numbers in the PBX system using a management terminal or the like. If there is an increase / decrease in the number of PBX devices or movement of telephone terminals, the engineer needs to update the telephone number table of all offices. If the above-mentioned premise is applied, the user can make a call without being aware of which PBX device the callee is accommodated in when making a call. That is, the user can make a call without making a special input for designating the PBX device that accommodates the call destination. Note that “the destination is accommodated in the PBX device” means that information on the telephone terminal serving as the destination is registered in a database stored in the PBX device.

However, in a temporary PBX system that is temporarily installed in a disaster-stricken area, even if the cooperation between multiple PBX devices is functioning, if the user wants to call a destination in the disaster-stricken area, It is necessary to be aware of which PBX device is housed. However, it is difficult for the user to be aware as described above in consideration of the emergency situation in the disaster area. This is especially true when a new telephone terminal is registered or a registered telephone terminal is frequently deleted due to movement of the telephone terminal or the like for the temporary PBX system.

The present invention has been made in view of such problems, and quickly shares information about subscribers among a plurality of PBX devices installed in a disaster-stricken area, and is not conscious of the user's accommodation destination. The purpose is to provide a call service.

In order to achieve the above object, the invention according to claim 1 of the present invention is a pair of a PBX device that controls a call from a telephone terminal and a subscriber registration device that accepts registration or deletion of the telephone terminal, A PBX cooperation system in which a plurality of the PBX devices in one area capable of making a call cooperate to provide a call service, in which the subscriber registration device obtains subscriber information of the telephone terminal for each telephone terminal. Notifies the stored subscriber database and the registration or deletion of the telephone terminal to the other subscriber registration device paired with another PBX device in the area to which the paired PBX device belongs. When the registration or deletion of the telephone terminal is notified from another subscriber registration apparatus paired with another PBX apparatus in the area, the registration or deletion of the telephone terminal is performed. A subscriber information registration receiving unit for writing in the subscriber database, and when the PBX device receives a call connection request to a telephone terminal that is not accommodated in the PBX device, Instruct the subscriber registration device to inquire about the subscriber registration device and the other PBX device in which the telephone terminal whose destination is specified by the inquiry is accommodated to call the telephone terminal whose destination is specified. And a call control unit.

Further, in the invention described in claim 2 of the present invention, in the invention described in claim 1, the subscriber information registration receiving unit is configured such that a new PBX device is connected to a plurality of PBX devices in the area. As a result, the registration of the telephone terminal accommodated by the new PBX device is written in the subscriber database, and at least one PBX device in the plurality of PBX devices in the area is not connected. Due to this, the deletion of the telephone terminal accommodated by the unconnected PBX device is written in the subscriber database.

In the invention according to claim 3 of the present invention, a PBX device that controls a call from a telephone terminal and a subscriber registration device that accepts registration or deletion of the telephone terminal are paired, and the communication is performed in one area where communication is possible. A PBX cooperation method in a PBX cooperation system in which a plurality of the PBX devices cooperate to provide a call service, wherein the subscriber registration device has registered or deleted the telephone terminal as a pair. A step of notifying another subscriber registration device paired with another PBX device in the area to which the PBX device belongs, and from the other subscriber registration device paired with another PBX device in the area; Writing the registration or deletion of the telephone terminal in a subscriber database provided in the subscriber registration device when notified that the registration or deletion of And when the PBX device receives a call connection request with a telephone terminal not accommodated in the PBX device as a call destination, the PBX device makes an inquiry to the subscriber registration device to be paired; Instructing another PBX device in which the specified telephone terminal is accommodated to call the telephone terminal whose destination is specified.

According to a fourth aspect of the present invention, there is provided a subscriber registration device which is paired with a PBX device for controlling a call from a telephone terminal and accepts registration or deletion of the telephone terminal. The subscriber database storing the subscriber information for each telephone terminal and the registration or deletion of the telephone terminal are paired with other PBX apparatuses in the area to which the paired PBX apparatus belongs. When notifying other subscriber registration devices and notifying that there has been registration or deletion of the telephone terminal from another subscriber registration device paired with another PBX device in the area, the telephone terminal A subscriber information registration receiving unit that writes the registration or deletion of the information in a subscriber database included in the subscriber registration device.

The invention according to claim 5 of the present invention is a subscriber registration program for causing a computer to function as the subscriber registration apparatus according to claim 4.

According to the inventions of

claims

1, 3 to 5, the telephone terminal accommodated in each of a plurality of PBX devices belonging to one communicable area as the telephone terminal is newly registered or deleted Even if different, the subscriber information of the telephone terminal is synchronized between the subscriber registration devices. Therefore, even if the destination telephone terminal is accommodated in any PBX apparatus belonging to the area, the PBX apparatus that has received the call connection request from the source telephone terminal inquires of the paired subscriber registration apparatus. Thus, the destination telephone terminal can be reliably identified and called via the PBX device that accommodates the destination telephone terminal. As a result, it is possible to quickly share information about subscribers among a plurality of PBX devices installed in a stricken area or the like, and to provide a call service that is unaware of the user's accommodation destination.

Further, according to the invention described in claim 2, in response to the registration of the telephone terminal resulting from the connection of the new PBX device or the deletion of the telephone terminal resulting from the disconnection of the PBX device, The entire subscriber information of the telephone terminal can be synchronized between each of the subscriber registration devices. As a result, information regarding subscribers can be quickly shared among a plurality of PBX devices so as to correspond to connection or non-connection of the PBX devices, and a call service that is unaware of the user's accommodation destination can be provided.

According to the present invention, it is possible to quickly share information about subscribers among a plurality of PBX devices installed in a stricken area or the like, and to provide a call service that is not conscious of the user's accommodation destination.

It is explanatory drawing which shows schematic structure which provides the telephone service using a temporary PBX apparatus. It is explanatory drawing which shows that a some temporary PBX apparatus cooperates and provides a telephone service. It is explanatory drawing which shows the outline | summary of the subscriber registration method to a subscriber registration server. It is explanatory drawing which shows synchronizing subscriber information between subscriber registration servers. It is a structural example of the subscriber database which a subscriber registration server memorize | stores. It is a structural example of the temporary PBX database which a subscriber registration server memorize | stores. It is a sequence diagram which shows the process for a new telephone terminal registering and implement | achieving a telephone call with the telephone terminal.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings as appropriate.
As shown in FIG. 1, for example, a mobile phone terminal 3c (3) such as a smartphone is connected to another mobile phone terminal 3d (3) via a nearest mobile phone base station (not shown) and a mobile phone network 7. ), The fixed telephone terminal 5 and the IP (Internet Protocol) telephone terminals 4d (4) and 4e (4). Similarly, for example, the fixed telephone terminal 5 has a telephone exchange office (not shown) in which a subscriber line is accommodated and the public telephone network 8, and the

IP telephone terminals

4d and 4e have access lines. Calls can be made with the

other telephone terminals

3, 4, 5 via the accommodated IP relay station (not shown) and the IP network 9.

If all mobile phone base stations, telephone exchanges, and IP relay stations installed in the disaster area have lost their functions due to a large-scale disaster, etc., all

telephone terminals

3, 4, and 5 in the disaster area will receive calls. Cannot be done.

Therefore, in order to restore the telephone service as soon as possible in such a situation, the local government or the like uses a mobile switching center 1 using a temporary PBX device as an emergency measure value as shown in FIG. By constructing a temporary LAN 2 by bringing it into the disaster area, existing mobile phone terminals 3a (3), 3b (3) and general-purpose IP phone terminals 4a (4), 4b (4), 4c (4) in the disaster area ) (Including PCs (including Personal Computers)) is being considered for use as extension telephone terminals.

When constructing a temporary PBX device installed as the mobile switching center 1, the mobile switching center 1 installed in the disaster area is, for example, an IP-PBX server 11 (PBX device) and IP-PBX that perform extension exchange. A management terminal 12 serving as a management console of the server 11 is provided, and is connected to the public telephone network 8 and the IP network 9 via the gateway 6. In the temporary LAN 2, the mobile switching center 1 and each device are wiredly connected by a HUB 21 and a LAN cable, or wirelessly connected via a wireless LAN base station (access point) 22. When the mobile switching center 1 is installed at one base in the disaster area, an area where a call can be made using the mobile phone terminal 3 or the like is formed.

As shown in FIG. 2, when recovery after the disaster progresses, the mobile switching center 1 can be installed at a plurality of sites in the disaster area. As a result, the callable areas formed by the mobile switching centers 1 are connected to each other, so that a larger callable area can be formed. Within the formed large-scale area, different IP-PBX servers 11 cooperate with each other, so that the extensions of the mobile phone terminals 3a (3), 3b (3) accommodated in the different IP-PBX servers 11 Calls can be made. The IP-PBX server 11 connected to the gateway 6 can also make an outside line call.

As shown in FIG. 3, in the event of a disaster, a telephone terminal that can be accommodated in the temporary PBX system needs a function for making a call using IP communication and a subscriber registration function for the IP-PBX system. It becomes. As shown in FIG. 3, when the target telephone terminal is a mobile phone terminal 3 such as a smartphone, the IP-PBX registration function unit 32 having a subscriber registration function has a dedicated application program (in FIG. (Abbreviated) is previously installed in the terminal. When the general-purpose PC 4 is newly used as a telephone terminal, the IP-PBX registration function unit 42 is realized by a general-purpose Web browser. Therefore, the URL (Uniform Resource Locator) of the Web page providing the function The address only needs to be registered in the storage unit in advance. An IP-Phone 31 and an IP-Phone 41 are preinstalled as application programs for making a call using IP communication.

A subscriber information registration receiving unit 17 preinstalled as a control program (subscriber registration program) of the subscriber registration server 16 (subscriber registration device) is a subscriber registration request transmitted from the mobile phone terminal 3 or the PC 4; Then, a subscriber registration request or the like input from the management terminal 12 is accepted, and this request is transferred to the subscriber information registration management unit 14 that is installed in advance as a control program of the IP-PBX server 11. The subscriber information registration management unit 14 adds the subscriber information included in the received subscriber registration request to the subscriber database 13 and stores it.

The subscriber registration server 16 is provided as a pair with the IP-PBX server 11 installed in a predetermined area. That is, the subscriber registration server 16 and the IP-PBX server 11 form one information unit (IU: Information Unit). The subscriber registration server 16 may be installed near the IP-PBX server 11 or may be installed outside the communicable area formed by the IP-PBX server 11. A subscriber registration server 16 (not shown) is provided as a pair for each of the IP-PBX servers 11 linked to each other shown in FIG. A plurality of subscriber registration servers 16 are connected so as to communicate with each other and can exchange predetermined information.

When newly registering a subscriber to the temporary PBX device 1 at the time of a disaster or the like, the user of the target telephone terminal performs a predetermined operation, whereby the respective IP-PBX

registration function units

32 and 42 are performed. Is activated. As a result, the IP-PBX

registration function units

32 and 42 connect the terminal to the temporary LAN 2 to acquire the IP address used by the terminal, and register the acquired IP address and the extension telephone number as its own IP address. A subscriber registration request including the phone number unique to the terminal is transmitted to the subscriber registration server 16 via the temporary LAN 2. The subscriber information registration receiving unit 17 of the subscriber registration server 16 that has received the request forwards the received subscriber registration request to the IP-PBX server 11 that performs call control, and receives the request from the IP-PBX server 11 that has received the request. The subscriber information registration management unit 14 registers the correspondence data between the IP address and the extension telephone number in the subscriber database 13 to complete the subscriber registration.

At this time, when the target telephone terminal is the mobile telephone terminal 3, the unique telephone number transmitted by the IP-PBX registration function unit 32 as the registered extension telephone number is the SIM card installed in the terminal. (Subscriber Identity Module) The registered mobile phone number read from the card 33 is used. As a result, the mobile phone number unique to the terminal is directly registered in the temporary PBX device 1 as the extension telephone number of the terminal, so that manual entry by the user is unnecessary and subscriber registration can be easily performed. . Further, it is possible to prevent erroneous input of phone numbers and false registration. Further, other users other than the user of the terminal can improve the convenience of the service because the telephone number of the call destination that has been used before becomes the extension telephone number as it is.

Further, when the general-purpose PC 4 is newly used as a telephone terminal, the user of the terminal accesses the specific URL address from the Web browser, so that the subscriber information registration receiving unit 17 of the subscriber registration server 16 can access it. The function of the IP-PBX registration function unit 42 is provided. As a result, the IP-PBX registration function unit 42 has a unique telephone number (a fixed telephone number, an IP telephone number, or a mobile telephone number of a mobile telephone terminal that cannot be used as an extension telephone terminal) that has been used by the user. The subscriber registration request including the inputted telephone number is transmitted to the subscriber registration server 16.

On the other hand, the subscriber information registration receiving unit 17 of the subscriber registration server 16 responds to a subscriber registration request transmitted from a telephone terminal such as the mobile phone terminal 3 or the PC 4 or input from the management terminal 12. Subscriber information included in the subscriber registration request is added to the subscriber database 19 and stored. Since the telephone terminal transmits a subscriber registration request to one of the plurality of subscriber registration servers 16 constituting the PBX cooperation system, the subscriber information acquired by each of the subscriber registration servers 16 varies. However, each subscriber registration server 16 can synchronize with other subscriber registration servers 16 regarding subscriber information. As a result, each of the subscriber registration servers 16 acquires the subscriber information acquired by all the subscriber registration servers 16 that are paired with all the IP-PBX servers 11 that are linked in one communicable area. can do.

The subscriber database 19 of the subscriber registration server 16 generally registers the subscriber information of the telephone terminals accommodated by each of the IP-PBX servers 11 linked within one communicable area. . On the other hand, the subscriber database 13 of the IP-PBX server 11 individually registers only the subscriber information of the telephone terminal that has made a subscriber registration request to the paired subscriber registration server 16.

As shown in FIG. 4, when a predetermined condition is satisfied, the subscriber information is synchronized between the subscriber registration server 16a (16) and the subscriber registration server 16b (16). The predetermined condition is that a new telephone terminal has accessed the subscriber registration server 16, that the telephone terminal accommodated in the IP-PBX server 11 paired with the subscriber registration server 16 has been deleted, etc. There is. When performing the synchronization, the subscriber registration server 16a transmits a subscriber information synchronization request to the subscriber registration server 16b by the subscriber information registration receiving unit 17a (17). The subscriber information synchronization request includes the IP address of the telephone terminal and the telephone number of the telephone terminal included in the subscriber information registered in the subscriber database 19a (19), and the IP paired with the subscriber registration server 16a. -Includes a temporary PBX-ID that identifies the PBX server 11a (not shown in FIG. 4). The temporary PBX-ID can be acquired from the temporary PBX database 18a (18) stored in the subscriber registration server 16a.

When performing the synchronization, the subscriber registration server 16b (16) transmits a subscriber information synchronization request to the subscriber registration server 16a by the subscriber information registration receiving unit 17b (17). The subscriber information synchronization request includes the IP address of the telephone terminal and the telephone number of the telephone terminal included in the subscriber information registered in the subscriber database 19b (19), and the IP paired with the subscriber registration server 16b. -It includes a temporary PBX-ID that identifies the PBX server 11b (not shown in FIG. 4). The temporary PBX-ID is acquired from the temporary PBX database 18b (18) stored in the subscriber registration server 16b.

A plurality of subscriber registration servers 16 (or paired IP-PBX servers 11) that synchronize subscriber information have a predetermined logical topology such as a star type, a link type, a hierarchical type, or a mesh type. be able to.

As shown in FIG. 5, the subscriber record registered in each row of the subscriber database 19 is composed of fields of MAC (Media Access Control) address, IP address, extension telephone number, registration date / time, registration password, and accommodation PBX. Has been. The number of subscriber records in the subscriber database 13 is equal to the total number of telephone terminals accommodated by each of the IP-PBX servers 11 linked within one communicable area.

The MAC address is a unique address in the world assigned in advance to each communication port mounted on the apparatus.
An IP address is an address that uniquely identifies a telephone terminal.
In the extension telephone number, any one of the mobile telephone number, fixed telephone number, and IP telephone number included in the subscriber registration request is registered.
In the registration date and time, the registration date and time of the subscriber record is recorded.
The registration password is an arbitrary character string that needs to be input when updating or deleting the subscriber record, and is specified when the user performs a subscriber registration operation.
The accommodation PBX is an IP-PBX server 11 that accommodates the telephone terminal that has transmitted the subscriber registration request, and stores a temporary PBX-ID value that identifies the IP-PBX server 11.

The data structure of the subscriber database 13 stored in the IP-PBX server 11 may be equal to the data structure of the subscriber database 19. However, the IP-PBX server 11 may omit the accommodation PBX field. A subscriber record registered in a certain subscriber database 13 includes only a subscriber record indicating a telephone terminal accommodated by the IP-PBX server 11 storing the subscriber database 13, and is stored in a field of the accommodated PBX. This is because it is obvious that the stored value is the temporary PBX-ID of the IP-PBX server 11. The number of subscriber records in the subscriber database 13 is equal to the number of telephone terminals accommodated by one IP-PBX server 11.

As shown in FIG. 6, the temporary PBX record registered in each row of the temporary PBX database 18 includes fields of temporary PBX-ID, IP address, connection status, availability of external line transmission, installation date / time, and installation position. .

The temporary PBX-ID is a number for identifying each IP-PBX server 11 in one communicable area.
The IP address is an address that uniquely identifies the IP-PBX server 11 identified by the temporary PBX-ID.

The connection state refers to whether or not the IP-PBX server 11 identified by the temporary PBX-ID and the other IP-PBX server 11 are communicably connected. In the connection status field, “connected” indicating that the IP-PBX server 11 is connected, “not connected” indicating that the IP-PBX server 11 is not connected, and the IP- A value “self” indicating the PBX server 11 itself is stored.

For example, each of the IP-PBX servers 11 may have monitoring means for monitoring the connection state with all of the other IP-PBX servers 11. Each of the IP-PBX servers 11 periodically makes a connection confirmation request to all of the other IP-PBX servers 11 from its own IP-PBX server 11 by the monitoring means, and determines whether or not there is a response. Thus, the connection state can be determined. If there is a response, it is determined as “connected”, and if there is no response, it is determined as “not connected”. In addition, the monitoring means may be a means for the administrator to send a SIP Register message to all the other IP-PBX servers 11 using CLI (Command Line Interface). With this means, it is possible to immediately detect a change in the configuration of the PBX cooperation system due to connection or non-connection of the IP-PBX server 11.

“External line availability” refers to whether or not the IP-PBX server 11 is connected to the public telephone network 8, the IP network 9, and the like and can make a call to a telephone terminal in a different area. In the “outline transmission permission / non-permission” field, values of “transmission permitted” indicating that an outside line can be transmitted and “transmission impossible” indicating that an outside line cannot be transmitted are stored.

The installation date and time refers to the date and time when the IP-PBX server 11 was installed in a disaster area or the like.
The installation position refers to a place where the IP-PBX server 11 is installed. For example, a shelter address is stored.

The call control unit 15 (see FIG. 3), which is preinstalled as a control program for the IP-PBX server 11, performs processing of a call connection request received via an extension telephone terminal connected to the temporary LAN 2 or the gateway 6. Designed to refer to the subscriber database 13. The call control unit 15 can call a telephone terminal in which a unique telephone number is registered as an extension telephone number in the subscriber database 13 and subscriber registration is completed, and a call can be started. Accordingly, extension telephone calls using the IP-

Phones

31 and 41 installed in both terminals can be performed between the extension telephone terminals for which subscriber registration has been completed. If the IP-PBX server 11 is connected to the public telephone network 8, the IP network 9, etc., the call control unit 15 can make an outside line call.

The telephone terminals such as the mobile phone terminal 3 and the PC 4, the IP-PBX server 11, the management terminal 12, and the subscriber registration server 16 described so far have hardware such as an input unit, an output unit, a control unit, and a storage unit, respectively. Including computers. For example, when the control unit includes a CPU (Central Processing Unit), information processing by a computer including the control unit is realized by a program execution process by the CPU. In addition, the storage unit included in the computer stores a program that is instructed by the CPU and implements the function of the computer. This realizes cooperation between software and hardware. The program is provided by being recorded on a recording medium or via a network.

<Processing>
Next, processing in this embodiment will be described. The main body of this process is a control unit of each device constituting the PBX cooperation system and a control unit connected to the PBX cooperation system, but the term “control unit” is omitted for convenience of explanation.

The user of the mobile phone terminal 3 performs a predetermined operation for switching to the operation mode at the time of the disaster at the mobile phone terminal 3 in which the communication path during the normal operation is blocked due to a disaster or the like. Then, the mobile phone terminal 3 is connected to the temporary LAN 2 via, for example, a wireless LAN base station (access point) 22 (see FIG. 1).

The mobile phone terminal 3 notifies its own MAC address to a DHCP (Dynamic Host Configuration Protocol) server (not shown) that manages the IP address of the terminal connected to the temporary wireless LAN (temporary LAN) 2 and wirelessly. A connection request to the LAN is made. When the mobile phone terminal 3 acquires the IP address issued from the DHCP server, it can communicate with other terminals connected to the temporary LAN 2.

The mobile phone terminal 3 requests the DNS (Domain Name System) server (not shown) to resolve the server name of the IP-PBX server 11 using the acquired IP address. Then, the cellular phone terminal 3 receives notification of the IP address of the subscriber registration server 16 and the IP address of the IP-PBX server 11 from the DNS server.

For communication between a telephone terminal such as the cellular phone terminal 3 and the subscriber registration server 16 or the IP-PBX server 11, TCP / IP (Transmission Protocol / Internet Protocol) communication such as HTTP (HyperText 、 Transfer 等 Protocol) is used. Can be used.

Through the above procedure, the process of step S101 in FIG. 7 starts. In FIG. 7, the subscriber registration server 16a (16) and the IP-PBX server 11a (11) are paired to form one IU. The subscriber registration server 16b (16) and the IP-PBX server 11b (11) are paired to form one IU. The IP-

PBX servers

11a and 11b are linked within one communicable area.

In step S101, the mobile phone terminal 3 makes a subscriber registration request to the subscriber registration server 16a. The subscriber registration request can be, for example, a SIP-Register message. The subscriber registration request includes subscriber information such as a MAC address, an IP address, a unique telephone number, and a registration password of the mobile phone terminal 3, for example. After step S101, the process proceeds to step S102.

In step S102, the subscriber registration server 16a refers to the subscriber information included in the subscriber registration request by the function of the subscriber information registration receiving unit 17, and stores a new subscriber record in the subscriber database 19a (19). The subscriber database 19b is updated so as to be added. Thereby, the registration of the mobile phone terminal 3 is written in the subscriber database 19b. After step S102, the process proceeds to step S103.

In step S103, the subscriber registration server 16a makes a terminal accommodation request regarding the mobile phone terminal 3 to the IP-PBX server 11a by the function of the subscriber information registration receiving unit 17. The terminal accommodation request includes the subscriber information included in the subscriber registration request of the mobile phone terminal 3. After step S103, the process proceeds to step S104.

In step S104, the IP-PBX server 11a refers to the subscriber information included in the terminal accommodation request and adds a new subscriber record to the subscriber database 13 by the function of the subscriber information registration management unit 14. The subscriber database 13 is updated. As a result, the registration of the mobile phone terminal 3 is written in the subscriber database 13, and the IP-PBX server 11a can call the mobile phone terminal 3 when receiving a call with the mobile phone terminal 3 as a call destination. After step S104, the process proceeds to step S105.

In step S105, the subscriber registration server 16a makes a subscriber information synchronization request regarding the mobile phone terminal 3 to the subscriber registration server 16b by the function of the subscriber information registration receiving unit 17. The subscriber information synchronization request includes the IP address of the mobile phone terminal 3, the mobile phone number, and a temporary PBX-ID for identifying the IP-PBX server 11a. Synchronization of subscriber information between the

subscriber registration servers

16a and 16b follows the description with reference to FIG. After step S105, the process proceeds to step S106.

In step S106, the subscriber registration server 16b refers to the information included in the subscriber information synchronization request by the function of the subscriber information registration receiving unit 17, and stores a new subscriber record in the subscriber database 19b (19). The subscriber database 19b is updated to add. Thereby, the registration of the mobile phone terminal 3 is written in the subscriber database 19b.

The synchronization of the subscriber information of the newly registered mobile phone terminal 3 is realized by the processing from step S101 to step S106. After step S106, for example, when a call is to be made between the PC 4 and the mobile phone terminal 3, the process proceeds to step S107.

In step S107, the PC 4 makes a call connection request to the IP-PBX server 11b that accommodates the PC 4 with the mobile phone terminal 3 as the call destination. The call connection request includes the mobile phone number of the mobile phone terminal 3. After step S107, the process proceeds to step S108.

In step S108, the IP-PBX server 11b makes a call destination inquiry request including the mobile phone number included in the call connection request from the PC 4 to the subscriber registration server 16b by the function of the subscriber information registration management unit 14. Do. In the process of FIG. 7, even if the subscriber database 13 is referenced using the mobile phone number as a search key, there is no corresponding subscriber record of the destination.

If the corresponding destination subscriber record exists in the subscriber database 13, the IP-PBX server 11 b immediately calls the destination telephone terminal by the call control unit 15 to establish the extension connection, The call is started.
After step S108, the process proceeds to step S109.

In step S109, when the subscriber database 19 has a subscriber record of the cellular phone terminal 3 by the function of the subscriber information registration receiving unit 17, the subscriber registration server 16b sends a call as a response to the call destination inquiry request. The mobile phone number of the previous mobile phone terminal 3 is notified to the IP-PBX server 11b. This is the case in the process of FIG.

At this time, the subscriber registration server 16b acquires the MAC address or IP address for calling the mobile phone terminal 3 as a call destination via the temporary LAN 2 from the subscriber record of the mobile phone terminal 3 in the subscriber database 19. . Further, the subscriber registration server 16b obtains the temporary PBX-ID of the IP-PBX server 11a that accommodates the mobile phone terminal 3 that is the transmission destination from the accommodation PBX field of the subscriber record. The subscriber registration server 16b notifies the IP-PBX server 11b of the acquired MAC address or IP address of the mobile phone terminal 3 and the temporary PBX-ID together with the mobile phone number of the mobile phone terminal 3. After step S109, the process proceeds to step S110.

In step S110, the IP-PBX server 11b uses the function of the call control unit 15 to send a mobile phone as a destination to the IP-PBX server 11a identified by the temporary PBX-ID notified from the subscriber registration server 16b. Instruct the terminal 3 to call. The call instruction includes the MAC address or IP address of the mobile phone terminal 3 that is the destination and the mobile phone number of the mobile phone terminal 3. After step S110, the process proceeds to step S111.

In step S111, the IP-PBX server 11a uses the function of the call control unit 15 to make a call to the mobile phone terminal 3 as a call destination using the MAC address or IP address included in the call instruction. The IP-PBX server 11a refers to the subscriber database 13 by referring to the subscriber database 13 using the mobile phone number of the mobile phone terminal 3 included in the calling instruction by the subscriber information registration management unit 14 as a search key. The validity of the call instruction can be confirmed. After step S111, the process proceeds to step S112.

In step S112, when the IP-PBX server 11a receives a response to the destination call from the mobile phone terminal 3, the extension connection between the caller PC 4 and the call destination mobile phone terminal 3 is established, and the call is made. Be started. After step S112, the process of FIG. 7 ends.

[Outside line transmission]
If the subscriber database 19 does not have the subscriber record of the mobile phone terminal 3 in step S109, the subscriber registration server 16b determines that the mobile phone number of the mobile phone terminal 3 as the call destination is the telephone number of the outside line. It is determined that At this time, the subscriber registration server 16b determines that the IP-PBX server 11 that can make an outgoing call out of the plurality of linked IP-PBX servers 11 (the value of “external call availability” in the temporary PBX database 18 is “permitted”). The IP-PBX server 11) is notified of the external line number of the call destination.

The IP-PBX server 11 capable of making an outside line call sends the destination telephone number, the outside line telephone number (the outside line telephone number of the IP-PBX server 11 capable of making an outside line call) and the extension telephone number via the gateway 6 to the other telephone network. To the destination telephone number of the outside line. The call control unit of the other telephone network that has received a call from the IP-PBX server 11 that can make an external call makes a call to the call destination telephone terminal (external line) and receives a response from the call destination telephone terminal Then, the connection between the caller extension telephone terminal and the callee telephone terminal is established, and the call is started.

[Processing when a phone terminal is deleted]
FIG. 7 illustrates synchronization of subscriber information between the subscriber registration servers 16 when a telephone terminal such as the mobile phone terminal 3 is newly registered in the PBX cooperation system of the present embodiment. Synchronization can be applied when deleting a telephone terminal registered in the subscriber registration server 16.

That is, when the subscriber registration server 16 receives a subscriber deletion request from the telephone terminal to be deleted (application of step S101 in FIG. 7), the subscriber registration server 16 manages the corresponding subscriber record in the deletion state in the subscriber database 19 ( Application of step S102 in FIG. 7). Further, when the IP-PBX server 11 paired with the subscriber registration server 16 receives a request to delete the accommodated telephone terminal (application of step S103 in FIG. 7), the telephone to be deleted in the subscriber database 13 The terminal subscriber records are managed in a deleted state (application of step S104 in FIG. 7).

Furthermore, when there is a subscriber information synchronization request (application of step S105 in FIG. 7), the subscriber registration server 16 that has received the request manages the corresponding subscriber record in the subscriber database 19 in a deleted state ( Application of step S106 in FIG. 7).

Specifically, the subscriber database 19 includes a registration status field indicating whether the telephone terminal is “registered” or “deleted”, and the registration status of the subscriber record of the telephone terminal to be deleted is changed from “registered”. It is good to rewrite to “delete”. Further, in the subscriber database 19, the subscriber record of the telephone terminal to be deleted may be deleted without providing the registration status field. In this case, registration of a telephone terminal means creation of a subscriber record for the telephone terminal to be registered.

[Process when the configuration of cooperation between the IP-PBX servers 11 changes]
When the configuration of cooperation between the IP-PBX servers 11 in one communicable area is changed, that is, when one IP-PBX server 11 is connected or not connected, as described in FIG. The synchronization of subscriber information between the subscriber registration servers 16 is applied.

When one IP-PBX server 11 is connected, this means that a telephone terminal accommodated in the IP-PBX server 11 is newly registered in the PBX cooperation system. Therefore, synchronization of subscriber information between the subscriber registration servers 16 is executed for newly registered telephone terminals. For example, even after recovery after a disaster, the number of linked IP-PBX servers 11 tends to increase. Therefore, each time a new IP-PBX server 11 is linked, subscriber registration is performed. Synchronization of subscriber information between servers 16 is performed. The subscriber information registration receiving unit 17 of the subscriber registration server 16 writes the registration of the telephone terminal related to the synchronized subscriber information in the subscriber database 19.

On the other hand, when one IP-PBX server 11 is not connected, it means that the telephone terminal accommodated by the IP-PBX server 11 is deleted from the PBX cooperation system. Therefore, synchronization of subscriber information between the subscriber registration servers 16 is executed for the telephone terminals to be deleted. For example, even if recovery after a disaster is smooth, cooperation between the IP-PBX servers 11 in one communicable area may be divided due to the occurrence of a secondary disaster. If so, the subscriber information is synchronized between the subscriber registration servers 16. The subscriber information registration receiving unit 17 of the subscriber registration server 16 writes the deletion of the telephone terminal related to the synchronized subscriber information in the subscriber database 19.

(Summary)
From the above description, according to the present embodiment, the telephone terminal accommodated in each of the plurality of IP-PBX servers 11 belonging to one communicable area is different as the telephone terminal is newly registered or deleted. Even so, the entire subscriber information of the telephone terminal is synchronized between each of the subscriber registration servers 16. Therefore, even if the destination telephone terminal is accommodated in any IP-PBX server 11 belonging to the area, the IP-PBX server 11 that has received a call connection request from the source telephone terminal becomes a pair. By making an inquiry to the subscriber registration server 16, it is possible to reliably specify the destination telephone terminal and make a call via the IP-PBX server 11 that accommodates the destination telephone terminal. As a result, information regarding subscribers can be quickly shared among a plurality of IP-PBX servers 11 installed in a stricken area or the like, and a call service that is unaware of the user's accommodation destination can be provided.

After the disaster, as time elapses, the connection between the IP-PBX servers 11 or the wide area network is established, and the IP reachable environment is sequentially expanded. Therefore, a plurality of connected IP-PBX servers 11 cooperate with each other as needed. The telephone service area can be expanded.
On the other hand, when the cooperation between the IP-PBX servers 11 once connected is interrupted due to a secondary disaster or when a new IP-PBX server 11 is added, the configuration of the PBX cooperation system changes every moment. Is assumed. However, the voice call service can be continuously provided in response to such a change in configuration.
In addition, each IP-PBX server 11 grasps the connection state with other IP-PBX servers 11 so that when the IP-PBX server 11 stops or a network failure occurs, the remaining IP-PBX servers 11 A voice call service can be provided.
As described above, in an emergency situation after a disaster, the configuration of the PBX cooperation system changes every moment due to various factors, and new registration or deletion of telephone terminals is frequently performed for one communicable area. However, this embodiment can flexibly cope with such registration or deletion, and can ensure the communication connection between the transmission destination and the transmission source.

In particular, when a new IP-PBX server 11 is connected to the PBX cooperation system as time elapses, it is necessary to register a telephone terminal accommodated by the new IP-PBX server 11. Further, when the IP-PBX server 11 constituting the PBX cooperation system becomes unconnected, it is necessary to delete the telephone terminal accommodated by the unconnected IP-PBX server 11. In the present embodiment, the entire subscriber information of the telephone terminal can be synchronized between each of the subscriber registration servers 16 in accordance with the registration or deletion. As a result, information on subscribers can be quickly shared among a plurality of IP-PBX servers 11 so as to correspond to connection or non-connection of the IP-PBX server 11, and a call service that is unaware of the user's accommodation destination is provided. Can be provided.

<Others>
This embodiment is an example for suitably carrying out the present invention, and is not intended to limit the present invention. Therefore, the present embodiment can be variously modified within a range that does not change the gist of the present invention.

In addition, it is possible to realize a technique in which various techniques described in this embodiment are appropriately combined.
Further, the software described in the present embodiment can be realized as hardware, and the hardware can also be realized as software.
In addition, hardware, software, flowcharts, and the like can be changed as appropriate without departing from the spirit of the present invention.

1 Mobile switching center (temporary PBX equipment)
2 Temporary LAN
3 Mobile phone terminals (phone terminals)
4 IP telephone terminals (telephone terminals, PC)
5 Fixed telephone terminals (telephone terminals)
6 Gateway 7 Mobile phone network 8 Public phone network 9 IP network 11 IP-PBX server (PBX device)
12 Management terminal 13 Subscriber database (individual)
14 subscriber information registration management unit 15 call control unit 16 subscriber registration server (subscriber registration device)
17 Subscriber information registration reception part 18 Temporary PBX database 19 Subscriber database (whole)
21 HUB
22 Wireless LAN base station (access point)
31, 41 IP-Phone
32, 42 IP-PBX registration function part 33 SIM card

Claims

A PBX device that controls a call from a telephone terminal and a subscriber registration device that accepts registration or deletion of the telephone terminal are paired, and a plurality of the PBX devices in one area where communication is possible cooperate to provide a call service PBX cooperation system that
The subscriber registration device is
A subscriber database storing subscriber information of the telephone terminal for each telephone terminal;
Notifying the other subscriber registration device paired with another PBX device in the area to which the paired PBX device belongs, that the telephone terminal has been registered or deleted,
When other subscriber registration devices paired with other PBX devices in the area are notified that the telephone terminal has been registered or deleted, the registration or deletion of the telephone terminal is performed in the subscriber database. And a subscriber information registration receiving section for writing in
The PBX device is
A subscriber information registration management unit that inquires of the subscriber registration device as a pair when receiving a call connection request to a telephone terminal that is not accommodated in the PBX device;
A call control unit for instructing another PBX device in which the telephone terminal whose destination is specified by the inquiry is accommodated to call the telephone terminal whose destination is specified;
PBX cooperation system characterized by this.
The subscriber information registration receiving unit
Due to the connection of a new PBX device to a plurality of PBX devices in the area, the registration of the telephone terminal accommodated by the new PBX device is written to the subscriber database,
Deletion of the telephone terminal accommodated by the unconnected PBX device due to at least one PBX device of the plurality of PBX devices in the area being unconnected Write to database,
The PBX cooperation system according to claim 1.
A PBX device that controls a call from a telephone terminal and a subscriber registration device that accepts registration or deletion of the telephone terminal are paired, and a plurality of the PBX devices in one area where communication is possible cooperate to provide a call service A PBX cooperation method in a PBX cooperation system,
The subscriber registration device is
Notifying the other subscriber registration device paired with another PBX device in the area to which the paired PBX device belongs, that the telephone terminal has been registered or deleted;
When another subscriber registration device that is paired with another PBX device in the area is notified that the telephone terminal has been registered or deleted, the registration or deletion of the telephone terminal is performed. Writing to a subscriber database provided with the device,
The PBX device is
When receiving a call connection request with a telephone terminal not accommodated in its own PBX device as a call destination, inquiring of the paired subscriber registration device;
Instructing another PBX device in which the telephone terminal whose destination is specified by the inquiry is accommodated to call the telephone terminal whose destination is specified;
The PBX cooperation method characterized by this.
A subscriber registration device that is paired with a PBX device that controls calls from a telephone terminal and accepts registration or deletion of the telephone terminal,
A subscriber database storing subscriber information of the telephone terminal for each telephone terminal;
Notifying the other subscriber registration device paired with another PBX device in the area to which the paired PBX device belongs, that the telephone terminal has been registered or deleted,
When another subscriber registration device that is paired with another PBX device in the area is notified that the telephone terminal has been registered or deleted, the registration or deletion of the telephone terminal is performed. A subscriber information registration receiving unit for writing in a subscriber database provided in the apparatus,
A subscriber registration device.
A subscriber registration program for causing a computer to function as the subscriber registration device according to claim 4.