JP5745658B1 - PBX device, subscriber registration method, and subscriber registration program - Google Patents

Abstract

The present invention provides a telephone service that makes it possible to quickly share information about subscribers among a plurality of PBX devices installed in a stricken area or the like and is unaware of a user's accommodation destination. An IP-PBX server 11 for controlling a call from a telephone terminal stores a subscriber database 13 storing subscriber information of the telephone terminal for each telephone terminal and all IPs in an area to which the IP-PBX server 11 belongs. -Among the PBX servers 11, the operation target specifying unit 24 that specifies one operation target, and if it is an operation target, the subscriber information of the telephone terminal accommodated by itself, and all other information in the area The subscriber information registration management unit 14 for storing the subscriber information of the telephone terminal accommodated in the IP-PBX server 11 in the subscriber database 13 and the own IP-PBX server 11 if it is an operation target. An operation control unit 25 that operates and stops its own IP-PBX server 11 if it is not an operation target. [Selection] Figure 3

Description

  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 the system as a temporary PBX system.

  Mobile phones such as smartphones that have been used in the past by temporarily installing a temporary PBX system compatible with wireless LAN (Local Area Network) in the affected areas where telephones could not be used 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.

Takahashi Takao, “What can the 2nd Asterisk (registered trademark) be used for?” April 20, 2006 ITPro [online], [search January 8, 2014], Internet <URL: http: // itpro .nikkeibp.co.jp / article / COLUMN / 20060419/235646 /? ST = network & P = 3>

  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. According to the technique of Non-Patent Document 1, when a user makes a call, the user can make a call without being aware of which PBX device the callee is accommodated in. 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, an invention according to claim 1 of the present invention is a PBX device for controlling a call from a telephone terminal, and stores subscriber information of the telephone terminal for each telephone terminal. A subscriber database, an operation target specifying unit that specifies one operation target among all PBX devices in the area to which the PBX device belongs, and if the PBX device is the operation target The subscriber information of the telephone terminal accommodated in the own PBX device and the subscriber information of the telephone terminal accommodated in all other PBX devices in the area are stored in the subscriber database. The subscriber information registration management unit and operation control for operating the PBX device if the PBX device is the operation target and stopping the PBX device if the operation is not the operation target It comprises, when it is characterized.

The invention of claim 2 of the present invention is a subscriber registration process in PBX system for controlling a call from the telephone terminal, the PBX system, within the area itself of the PBX device belongs, operation Detecting a new PBX device that is in operation, a step of identifying one of the PBX device and the new PBX device as an operation target, and if the PBX device is the operation target Receiving subscriber information of the telephone terminal accommodated in the new PBX device from the new PBX device and storing it in a subscriber database; and continuing the operation of the own PBX device; If the PBX device is not the operation target, the subscriber information stored in the subscriber database is stored in the new PBX device. Performing a step of transmitting, the step of stopping the own the PBX device, and characterized in that.

Further, in the invention according to claim 3 of the present invention, in the invention according to claim 2, if the PBX device is not the operation target, the PBX device The IP address of the PBX device and the IP address of the subscriber registration device paired with its own PBX device are respectively set as the IP address of the new PBX device and the new subscriber registration paired with the new PBX device. Rewriting to the IP address of the device.

According to a fourth aspect of the present invention, there is provided a subscriber registration method in a PBX device for controlling a call from a telephone terminal, wherein the PBX device itself is within an area to which the PBX device belongs. Detecting that all the PBX devices including the PBX device are not operating, identifying one new operation target among all the PBX devices, and determining that the PBX device is the new one. If it is a target to be operated, a step of receiving subscriber information of telephone terminals accommodated in all other PBX devices in the area and storing them in the subscriber database, and operating the own PBX device And a step of performing.

Further, the invention according to claim 5 of the present invention is the invention according to claim 4, wherein the PBX device is configured as follows with respect to a DNS server if its own PBX device is the new operation target. The IP address of the own PBX device that has been rewritten by the DNS server and the IP address of the subscriber registration device that is paired with the own PBX device, respectively, the original IP address of the own PBX device, and itself Rewriting to the original IP address of the subscriber registration device paired with the PBX device.

  According to a sixth aspect of the present invention, there is provided a subscriber registration program for causing a computer to function as the PBX device according to the first aspect.

  According to the first and sixth aspects of the invention, one PBX device is operated in the area, and the operating PBX device is subscriber information of telephone terminals accommodated by all the PBX devices in the area. It is characterized by centralized management. Therefore, all calls generated in the area are concentrated on one PBX device that is operating. Due to the centralized management, a plurality of PBX devices in the area need not be synchronized to acquire subscriber information of telephone terminals that are not accommodated. Because there is no synchronization, subscriber information may not be shared between specific PBX devices in the area, but the subscription that is owned by the PBX device for one PBX device in operation Since the subscriber information is taken over, it can be said that the subscriber information is substantially shared among all the PBX devices in the area. 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.

  According to the second aspect of the present invention, even if the area is expanded, one operating PBX device can centrally manage subscriber information, and a plurality of PBXs installed in a disaster area or the like. Information regarding subscribers can be quickly shared between devices, and a call service that is unaware of the user's accommodation destination can be provided.

  According to the invention described in claim 3, even if the operation target is dynamically changed by expanding the area, the telephone terminal is aware of the change of the operation target with respect to the operation target after the change. Subscriber registration request can be made.

  According to the fourth aspect of the present invention, even if the area is reduced, one operating PBX device can centrally manage subscriber information, and a plurality of PBXs installed in a disaster area or the like. Information regarding subscribers can be quickly shared between devices, and a call service that is unaware of the user's accommodation destination can be provided.

  According to the invention described in claim 5, even if the operation target is dynamically changed by reducing the area, the telephone terminal is aware of the change of the operation target with respect to the operation target after the change. Subscriber registration request can be made.

  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 unaware 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 a structural example of the subscriber database which an IP-PBX server memorize | stores. It is a structural example of the temporary PBX database which a subscriber registration server memorize | stores. It is explanatory drawing which shows taking over of subscriber information. It is explanatory drawing which shows re-registration of the subscriber information performed after area division. It is a flowchart which shows the process in the IP-PBX server at the time of area expansion. It is a flowchart which shows the process in the IP-PBX server at the time of area reduction.

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 includes, for example, an IP-PBX server 11 (PBX device) and an 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. In the formed large-scale area, the different IP-PBX servers 11 cooperate with each other so that the mobile phone terminals 3a (3), 3b (3), 3e ( An extension call between 3) and 3h (3) becomes possible. The IP-PBX server 11 connected to the gateway 6 can also make an outside line call.

  As shown in FIG. 3, a telephone terminal that can be accommodated in the temporary PBX system at the time of a disaster or the like 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 phone 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 a Web page that provides the function. The address only needs to be registered in the storage unit in advance. As application programs for making a call using IP communication, IP-Phone 31 and IP-Phone 41 are preinstalled, respectively.

The subscriber registration server 16 (subscriber registration device) includes a subscriber database 13, a subscriber information registration management unit 14, a call control unit 15, a PBX monitoring unit 23, an operation target specifying unit 24, and an operation control unit 25.
A subscriber information registration receiving unit 17 pre-installed as a control program of the subscriber registration server 16 (subscriber registration device) receives a subscriber registration request transmitted from the mobile phone terminal 3 or the PC 4 and an input from the management terminal 12. The subscriber registration request is received, and the 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 unit (may be referred to as “ICTU” (Information and Communication Technology Unit)). The subscriber registration server 16 may be installed in the vicinity of the IP-PBX server 11 or may be installed outside a 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 mutually linked IP-PBX servers 11 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 an IP address used by the terminal, and register the acquired IP address and the extension telephone number. 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 transfers the received subscriber registration request to the IP-PBX server 11 that performs call control, and receives the received 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 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 portable telephone number of a portable 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.

  As shown in FIG. 4, the subscriber record registered in each row of the subscriber database 13 is composed of fields of MAC (Media Access Control) address, IP address, extension telephone number, registration date / time, and registration password. . As will be described later, the number of subscriber records in the subscriber database 13 of the IP-PBX server 11 to be operated is the number of telephone terminals accommodated by all the IP-PBX servers 11 in one communicable area. Equal to the total number of subscribers. That is, the subscriber database 13 of the IP-PBX server 11 to be operated is the entire subscriber information of the telephone terminals accommodated by each of the IP-PBX servers 11 linked in one communicable area. Registered.

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 subscriber registration server 16 stores a temporary PBX database 18. The temporary PBX database 18 is a database that manages information related to the IP-PBX server 11 that is linked to the IP-PBX server 11 that is paired with the subscriber registration server 16. As recovery from a disaster progresses, there are more opportunities for cooperation between the IP-PBX servers 11, and a temporary PBX record corresponding to the newly linked IP-PBX server 11 is additionally registered in the temporary PBX database 18. For example, predetermined information is exchanged between the plurality of subscriber registration servers 16 so that the temporary PBX database 18 included in each of the subscriber registration servers 16 is updated to the latest state.

  As shown in FIG. 5, the temporary PBX record registered in each row of the temporary PBX database 18 is composed of fields of temporary PBX-ID, IP address, operating state, availability of external line transmission, installation date / time, installation position, and priority. Has been.

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 operating state refers to whether or not the IP-PBX server 11 identified by the temporary PBX-ID is operating. In the operation state field, a value of “operation” indicating that the IP-PBX server 11 is operating or “stop” indicating that the IP-PBX server 11 is stopped is stored.

  If the IP-PBX server 11 is operating, a call from a telephone terminal can be controlled. When the IP-PBX server 11 is stopped, the call from the telephone terminal cannot be controlled, but other linked IP-PBX servers 11 can be monitored or the other IP-PBX servers can be monitored. 11 and subscriber information can be exchanged.

  “External line availability” refers to whether the IP-PBX server 11 is connected to the public telephone network 8, the IP network 9 or the like via the gateway 6 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 priority is an index for determining which IP-PBX server 11 out of a plurality of IP-PBX servers 11 is to be operated or stopped. For example, five levels from “1” to “5” are set as priorities, “5” is the highest priority, the priority decreases from “5” to “1”, and “1”. Is the lowest priority. The IP-PBX server 11 having the highest priority among the IP-PBX servers 11 to be compared is the operation target, and the other IP-PBX servers 11 are the stop targets.

  The priority of the IP-PBX server 11 can be set using, for example, a reliability level set in the subscriber information registered in the IP-PBX server 11. For example, five levels from “1” to “5” are provided as reliability levels of registered subscriber information, and “5” is the highest reliability level, and the reliability increases from “5” to “1”. The degree level becomes smaller, and “1” is the smallest reliability level. The contents (level indices) from the reliability levels “1” to “5” are as shown in the following table.

  For example, the priority of the IP-PBX server 11 that registers a lot of subscriber information with a high reliability level may be increased. The priority of the IP-PBX server 11 that registers a lot of subscriber information with a small reliability level is preferably small.

  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 of the extension telephone terminals that have completed subscriber registration are possible. 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.

  A PBX monitoring unit 23 (see FIG. 3) installed in advance as a control program for the IP-PBX server 11 monitors and operates all the IP-PBX servers 11 in the area to which the IP-PBX server 11 belongs. The IP-PBX server 11 is detected.

  The operation target specifying unit 24 (see FIG. 3) preinstalled as a control program for the IP-PBX server 11 selects one of all the IP-PBX servers 11 in the area to which the IP-PBX server 11 belongs. , Specify as an operation target. For example, the operation target specifying unit 24 refers to the temporary PBX database 18 of the subscriber registration server 16 that is paired with the IP-PBX server 11 including the operation target specifying unit 24, and all the IP-PBXs in the area. The IP-PBX server 11 having the highest priority among the servers 11 is specified as an operation target. If there are two or more IP-PBX servers 11 having the highest priority, one may be arbitrarily selected.

  The operation control unit 25 (see FIG. 3) preinstalled as a control program for the IP-PBX server 11 operates according to the function of the operation target specifying unit 24 if the IP-PBX server 11 is an operation target. If it is not an operation target, it stops.

  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. When the control unit is constituted by, for example, a CPU (Central Processing Unit), information processing by a computer including the control unit is realized by program execution processing by the CPU. In addition, a storage unit included in the computer stores a program that is instructed by the CPU to realize 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.

[Centralized management of subscriber information]
This embodiment operates one IP-PBX server 11 that is identified as an operation target by the function of the operation target specifying unit 24 among a plurality of IP-PBX servers 11 that are linked in the area, and the remaining IP -All PBX servers 11 are stopped. At this time, each of the IP-PBX servers 11 subject to suspension uses the function of the subscriber information registration management unit 14 to convert the subscriber information of the telephone terminal stored in the subscriber database 13 into the IP to be operated. Send to PBX server 11 The subscriber information registration management unit 14 of the IP-PBX server 11 to be operated stores the subscriber information received from each of the IP-PBX servers 11 to be stopped in the subscriber database 13. If there is an overlap in the received subscriber information, the overlap may be excluded.

  Therefore, the subscriber database 13 of the operation target IP-PBX server 11 stores the subscriber information of all telephone terminals accommodated in the area, and the operation target IP-PBX server 11 stores the subscriber information. Will be centrally managed. All calls within that area are concentrated on the IP-PBX server 11 to be operated. As a result, the user of the telephone terminal does not need to be aware of the IP-PBX server 11 that is the accommodation destination of the destination telephone terminal when making a call. In addition, by performing the aggregation management of the subscriber information as described above, the synchronization of the subscriber information between the IP-PBX servers 11 is unnecessary.

  If the IP-PBX server 11 to be operated can make an outside line call, when receiving a call of a call destination that does not exist in the subscriber information that is centrally managed, for example, via the gateway 6 The outside line can be transmitted. Whether or not it is possible to make an outside line transmission can be determined by whether or not the value of the outside line transmission availability field in the temporary PBX database 18 (see FIG. 5) is “transmission is possible”.

[Inheritance of subscriber information due to area expansion]
As recovery after a disaster progresses, when adjacent ICTUs are gradually connected, cooperation between IP-PBX servers 11 is strengthened, and an IP reachable (IP packet reachable) area is expanded. In this embodiment, since there is only one IP-PBX server 11 operating in the area, a sub-area in which only one IP-PBX server 11 is already operating is operated in another sub-area. When another IP-PBX server 11 is newly connected and an enlarged area is formed, it is necessary to dynamically change the operation target.

  As shown in FIG. 6, in the subscriber information aggregation management method of this embodiment, when the unnecessary IP-PBX server 11 is stopped due to the connection of subareas, the subscriber information is taken over. The IP-PBX server 11a (11) (priority is 2) of ICTU1 that was operating in the original subarea is the IP-PBX server 11b (11) of ICTU2 that was operating in the original other subarea. (Priority is 1).

  When the PBX monitoring unit 23 of the IP-PBX server 11b detects an IP-PBX server 11a having a higher priority than its own IP-PBX server 11b, the DNS server 51b of the ICTU2 determines that the IP-PBX server 11b The address (192.168.1.102) is rewritten to the IP address (192.168.0.102) of the IP-PBX server 11a, and the rewritten IP address is returned. The DNS server 51b of ICTU2 rewrites the IP address (192.168.1.103) of the subscriber registration server 16b (16) with the IP address (192.168.0.103) of the subscriber registration server 16a (16), and rewrites the IP address. return it.

  The subscriber information registration management unit 14 of the IP-PBX server 11b transmits the subscriber information stored in the subscriber database 13b (13) to the IP-PBX server 11a. If there is a voice mail related to the subscriber related to the subscriber information, the voice mail is also transmitted to the IP-PBX server 11a. The IP-PBX server 11a stores the subscriber information received from the IP-PBX server 11b in the subscriber database 13a (13), so that the handover of the subscriber information is realized. Note that the order of the rewriting of the IP address and the transmission of the subscriber information does not matter.

The operation control unit 25 of the IP-PBX server 11b stops the IP-PBX server 11b.
The DNS server 51b of ICTU2 uses the IP address of the IP-PBX server 11b to be operated as the IP address of the IP-PBX server 11b to be stopped, and the IP address of the subscriber registration server 16b to be the pair, Even if the operation target is dynamically changed by expanding the area by rewriting the IP address of the subscriber registration server 16a as a pair, the telephone terminal can change the operation target after the change (in the case of FIG. 6, 11a ), The subscriber registration request can be made without being aware of the change of the operation target.

  The subscriber information of the user 1 is registered in the IP-PBX server 11a and stored in the subscriber database 13a before connection of the subarea. Even if there is a sub-area connection, the subscriber information of the user 1 is still stored in the IP-PBX server 11a having a higher priority.

  The subscriber information of the user 2 is registered in the IP-PBX server 11b and stored in the subscriber database 13b before the subarea connection. If there is a sub-area connection, the subscriber information of the user 2 is transmitted to the IP-PBX server 11a having a higher priority, but can remain stored in the IP-PBX server 11b. That is, the subscriber information of the user 2 is stored in both the subscriber databases 13a and 13b.

  Since the registration timing of the subscriber information of the user 3 is later than when the sub-area is connected, even if the mobile phone terminal 3 of the user 3 is in the vicinity of the IP-PBX server 11b to be stopped, the mobile phone The terminal 3 sends a subscriber information registration request to the subscriber registration server 16a having a higher priority. The subscriber information of the user 3 is registered in the IP-PBX server 11a and stored in the subscriber database 13a.

[Re-registration of subscriber information due to area division (reduction), etc.]
Even if the recovery after the disaster is smooth, the cooperation between the IP-PBX servers 11 may disappear due to the occurrence of a secondary disaster, and one area may be divided into two or more subareas. In this embodiment, since one IP-PBX server 11 is operated in the area, when there is no IP-PBX server 11 operating in the sub-area as a result of the division, one operation target is selected. It is necessary to dynamically change the operation target to determine.

The explanatory diagram of FIG. 7 shows an example in which the connection location between ICTU1 and ICTU2 shown in FIG.
As shown in FIG. 7, in the subscriber information aggregation management method of this embodiment, when the required IP-PBX server 11 is operated due to area division, subscriber information is re-registered. The IP-PBX server 11a in the area A formed after the division continues to operate. On the other hand, in the area B formed after the division, there is no IP-PBX server 11 in operation, including the IP-PBX server 11b.

  The PBX monitoring unit 23 of the IP-PBX server 11b detects the disconnection from the IP-PBX server 11a and also detects the IP-PBX server 11b itself as the IP-PBX server 11 having the highest priority in the area B. To do.

  When the operation target specifying unit 24 of the IP-PBX server 11b determines that the IP-PBX server 11b itself of the ICTU2 is the operation target, the DNS server 51b of the ICTU2 rewrites for taking over the subscriber information in FIG. The IP address (192.168.0.102) of the IP-PBX server 11b that has been rewritten is replaced with the original IP address (192.168.1.102), and the rewritten IP address is returned. Further, the DNS server 51b of ICTU2 replaces the IP address (192.168.0.103) of the subscriber registration server 16b, which has been rewritten for taking over the subscriber information in FIG. 6, with the original IP address (192.168.1.103). Returns the rewritten IP address.

The operation control unit 25 of the IP-PBX server 11b operates the IP-PBX server 11b.
The DNS server 51b of the ICTU2 rewrites the IP address of the IP-PBX server 11b newly targeted for operation after the division and the IP address of the subscriber registration server 16b as a pair with the original IP address. Even if the operation target is dynamically changed due to the division of the area, the telephone terminal registers the subscriber for the changed operation target (11b in the case of FIG. 7) without being aware of the change of the operation target. You can make a request.

In particular, when the changed operation target already has the subscriber information of a specific telephone terminal, the specific telephone terminal does not make a new subscriber registration request, -Call service can be used via the PBX server 11.
In addition, even if the operation target after the change does not have subscriber information of a telephone terminal that has completed registration of subscriber information with another ICTU, this telephone terminal The IP-PBX server 11 can be re-registered with the subscriber information in the same procedure.

  The subscriber information of the user 1 is registered in the IP-PBX server 11a before the area is divided and stored in the subscriber database 13a. Even if the area is divided, the subscriber information of the user 1 remains stored in the IP-PBX server 11a having a higher priority. Therefore, the cellular phone terminal 3 of the user 1 does not need to re-register the subscriber information with the subscriber registration server 16a of the ICTU 1 and can enjoy a call service.

  Prior to the time when the area was divided, the subscriber information of the user 2 was stored in both the subscriber databases 13a and 13b of the IP-PBX servers 11a and 11b by taking over the subscriber information. Even if the area is divided, the subscriber information of the user 2 remains in the subscriber database 13b of the IP-PBX server 11b having a lower priority. Therefore, the mobile phone terminal 3 of the user 2 does not need to re-register the subscriber information with the subscriber registration server 16b of the ICTU 2 and can enjoy a call service.

  The subscriber information of the user 3 was registered in the IP-PBX server 11a before the area was divided and stored in the subscriber database 13a (see FIG. 6). When the area is divided, the mobile phone terminal 3 of the user 3 can no longer transmit a call connection request to the IP-PBX server 11a having a higher priority, and the IP-PBX server 11b having a lower priority. The subscriber database 13b originally does not have the subscriber information of the user 3. For this reason, the cellular phone terminal 3 of the user 3 needs to newly re-register the subscriber information with respect to the subscriber registration server 16b of the ICTU 2 in order to enjoy the call service.

  Note that registration of the mobile phone terminal 3 (including re-registration after area division) is performed according to the following procedure. That is, the user of the mobile phone terminal 3 performs a predetermined operation for switching to the operation mode at the time of disaster at the mobile phone terminal 3 in which the communication path at the time of normal operation is blocked due to a disaster or the like. Then, the mobile phone terminal 3 is connected to the temporary LAN via, for example, a wireless LAN base station (access point) 22 (see FIG. 7).

  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 LAN, and requests connection to the wireless LAN. . 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.

  The cellular phone terminal 3 requests the DNS (Domain Name System) server 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 Control Protocol / Internet Protocol) communication such as HTTP (HyperText Transfer Protocol) is used. Can be used.

  Through the above procedure, registration of the mobile phone terminal 3 is completed, and the mobile phone terminal 3 can use the call service.

<Processing>
The processing in the IP-PBX server at the time of area expansion shown in FIG. 8 will be described in detail. The subject of this processing is the control unit of the IP-PBX server 11, but for convenience of explanation, the term “control unit” is omitted. The process of FIG. 8 starts, for example, when the area to which the IP-PBX server 11 belongs has expanded or periodically, and proceeds to step S101. Note that the noted IP-PBX server 11 is in operation.

  In step S101, the IP-PBX server 11 monitors all the IP-PBX servers 11 in the area by the PBX monitoring unit 23, and as a result, detects a new IP-PBX server 11 that is operating. The paired subscriber registration server 16 creates a temporary PBX record corresponding to the detected new IP-PBX server 11 from the monitored IP-PBX server 11 and monitors the temporary PBX database 18. Write the result. The other subscriber registration server 16 paired with the other IP-PBX server 11 in the area acquires the monitoring result from the subscriber registration server 16 and temporarily establishes an equivalent temporary PBX database 18. The PBX database 18 is updated. After step S101, the process proceeds to step S102.

  In step S <b> 102, the IP-PBX server 11 uses the operation target specifying unit 24 to specify one operation target among all the IP-PBX servers 11 in the area. Specifically, any one of its own IP-PBX server 11 that is in operation and the detected new IP-PBX server 11 is specified as an operation target. After step S102, the process proceeds to step S103.

  In step S103, the IP-PBX server 11 determines whether or not the IP-PBX server 11 is an operation target by performing the process in step S102. If it is an operation target (Yes in step S103), the process proceeds to step S104. On the other hand, if it is not the operation target (No in step S103), the process proceeds to step S106.

  In step S <b> 104, the IP-PBX server 11 receives subscriber information stored in the subscriber database 13 of the new IP-PBX server 11 from the detected new IP-PBX server 11. The own IP-PBX server 11 stores the received subscriber information in its own subscriber database 13, thereby realizing the takeover of the subscriber information. After step S104, the process proceeds to step S105.

  In step S <b> 105, the IP-PBX server 11 continues the operation of itself as an operation target by the operation control unit 25. After step S105, the process of FIG. 8 ends.

  In step S106, the IP-PBX server 11 transmits the subscriber information stored in its own subscriber database 13 to the detected new IP-PBX server 11. Note that the detected new IP-PBX server 11 stores the received subscriber information in its own subscriber database 13 to realize the takeover of the subscriber information. After step S106, the process proceeds to step S107.

  In step S107, the IP-PBX server 11 instructs the DNS server to be paired to rewrite the IP address of its own IP-PBX server 11 and the IP address of the subscriber registration server 16 to be paired. Specifically, the IP-PBX server 11 has detected the IP address of its own IP-PBX server 11 and the IP address of the paired subscriber registration server 16, respectively, An instruction is given to rewrite the IP address of the paired subscriber registration server 16. The DNS server rewrites the IP address according to the instruction, and returns the rewritten IP address to the IP-PBX server 11 and the subscriber registration server 16, respectively. After step S106, the process proceeds to step S107.

  In step S <b> 108, the IP-PBX server 11 causes the operation control unit 25 to stop itself that is not an operation target. After step S107, the process of FIG.

  If the own IP-PBX server 11 is an operation target (Yes in step S103), basically, the IP address of the own IP-PBX server 11 and the IP address of the subscriber registration server 16 to be paired No rewriting is required. However, when the operation target does not function normally due to the occurrence of a network failure or the like, the operation target may be dynamically changed as appropriate, and the IP address may be rewritten along with the change.

  According to the processing of FIG. 8, even when a new IP-PBX server 11 exists due to area expansion or the like, the IP-PBX server 11 that is optimal for centrally managing subscriber information is reliably identified. can do.

Next, the processing in the IP-PBX server at the time of area reduction shown in FIG. 9 will be described in detail. The subject of this processing is the control unit of the IP-PBX server 11, but for convenience of explanation, the term “control unit” is omitted. The process of FIG. 9 starts, for example, when the area to which the IP-PBX server 11 belongs is reduced or periodically, and proceeds to step S201.
Note that the IP-PBX server 11 of interest is stopped. Therefore, the paired DNS server has already rewritten the IP address of the IP-PBX server 11 and the paired subscriber registration server 16 with different IP addresses (see FIGS. 6 and 8). See description used). The another IP address is, for example, the IP address of the IP-PBX server 11 that has been operating in the area before reduction and the IP address of the subscriber registration server 16 that forms a pair.

In step S201, the IP-PBX server 11 monitors all the IP-PBX servers 11 in the area by the PBX monitoring unit 23, and as a result, detects that there is no IP-PBX server 11 in operation. If the IP-PBX server 11 that was originally operating does not exist in the area due to the reduction of the area, the subscriber registration server 16 that is paired with the monitored IP-PBX server 11 The temporary PBX record corresponding to the IP-PBX server 11 that no longer exists is deleted from the temporary PBX database 18. The other subscriber registration server 16 paired with the other IP-PBX server 11 in the area acquires the monitoring result from the subscriber registration server 16 and temporarily establishes an equivalent temporary PBX database 18. The PBX database 18 is updated.
The deletion of the temporary PBX record from the temporary PBX database 18 may mean that the temporary PBX record is actually deleted, or that the temporary PBX record is left in the deleted state.
After step S201, the process proceeds to step S202.

  In step S <b> 202, the IP-PBX server 11 specifies one operation target among all the IP-PBX servers 11 in the area by the operation target specifying unit 24. Specifically, one of all IP-PBX servers 11 that are stopped, including itself, is specified as an operation target. After step S202, the process proceeds to step S203.

  In step S203, the IP-PBX server 11 determines whether or not the IP-PBX server 11 is an operation target by performing the process in step S202. If it is an operation target (Yes in step S203), the process proceeds to step S204. On the other hand, if it is not an operation target (No in step S203), the process proceeds to step S207.

  In step S204, the IP-PBX server 11 receives the subscriber information stored in the subscriber database 13 of each IP-PBX server 11 from all the IP-PBX servers 11 in the area, and has its own subscription. Stored in the operator database 13. After step S204, the process proceeds to step S205.

  In step S205, the IP-PBX server 11 instructs the paired DNS server to rewrite the IP address of its own IP-PBX server 11 and the paired subscriber registration server 16. Specifically, the IP-PBX server 11 replaces the IP address of its own IP-PBX server 11 and the IP address of the subscriber registration server 16 which are rewritten by the DNS server with its own IP-PBX. The server 11 is instructed to rewrite the original IP address of the server 11 and the original IP address of the paired subscriber registration server 16. The DNS server rewrites the IP address according to the instruction, and returns the rewritten IP address to the IP-PBX server 11 and the subscriber registration server 16, respectively. After step S205, the process proceeds to step S206.

  In step S <b> 206, the IP-PBX server 11 operates itself as an operation target by the operation control unit 25. After step S206, the process of FIG. 9 ends.

  In step S207, the IP-PBX server 11 transmits the subscriber information stored in its own subscriber database 13 to the IP-PBX server 11 that has been activated. After step S207, the process proceeds to step S208.

  In step S <b> 208, the IP-PBX server 11 continues to stop itself that is not an operation target by the operation control unit 25. After step S208, the process of FIG. 9 ends.

  If the own IP-PBX server 11 is not the operation target (No in step S203), the IP address of the own IP-PBX server 11 and the IP address of the paired subscriber registration server 16 are respectively the operation target. It is appropriate to rewrite the IP address of the IP-PBX server 11 and the IP address of the subscriber registration server 16 as a pair. However, since the own IP-PBX server 11 remains stopped (step S208) and does not function particularly during operation of the PBX cooperation system, rewriting of the IP address may be omitted.

  According to the processing in FIG. 9, even when the IP-PBX server 11 that is in operation does not exist due to area reduction or the like, the IP-PBX server 11 that is optimal for centrally managing subscriber information. Can be reliably identified.

  Depending on the timing of the subscriber registration request of the telephone terminal and the timing of area reduction, the subscriber information of the telephone terminal that has been registered once is originally stored in its own IP-PBX server 11. The subscriber information and the subscriber information received by the own IP-PBX server 11 in step S204 may not be included. In this case, when a telephone terminal that has been registered once makes a call connection request to its own IP-PBX server 11 in operation, its own IP-PBX server 11 is a subscriber to the telephone terminal. Request re-registration of information. The telephone terminal makes a subscriber registration request to the subscriber registration server 16 paired with its own IP-PBX server 11, and its own IP-PBX server 11 sends its subscriber database 13 to the subscriber registration request. By storing the subscriber information included, re-registration of the subscriber information is realized.

(Summary)
From the above description, in the present embodiment, one IP-PBX server 11 is operated in the area, and the operating IP-PBX server 11 is accommodated in all the IP-PBX servers 11 in the area. It is characterized by centrally managing subscriber information of telephone terminals. Therefore, all calls generated in the area are concentrated on one IP-PBX server 11 that is operating. By the centralized management, the plurality of IP-PBX servers 11 in the area do not need to be synchronized to acquire subscriber information of telephone terminals that are not accommodated. Since there is no synchronization, subscriber information may not be shared among specific IP-PBX servers 11 in the area. However, the IP-PBX server 11 that is in operation has its own IP- Since the subscriber information stored in the PBX server 11 is taken over, it can be said that the subscriber information is substantially shared among all the IP-PBX servers 11 in the area. 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, with the passage of time, the connection between the IP-PBX servers 11 or the wide area network is established, and the IP reachable environment is sequentially expanded, so that the plurality of connected IP-PBX servers 11 cooperate with each other at any time, The telephone service area can be expanded.
On the other hand, when the cooperation between the IP-PBX servers 11 once connected due to a secondary disaster or the like is broken, 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 is stopped 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.

  When the area expands, there may be a new IP-PBX server 11 that is operating. Even in such a case, one optimal operation target is identified and the IP-PBX server 11 that is not the operation target is specified. Is stopped after the subscriber information is taken over to the operation target. As a result, even if the area expands, one operating IP-PBX server 11 can centrally manage subscriber information and joins between a plurality of IP-PBX servers 11 installed in a disaster area or the like. It is possible to quickly share information about a person and provide a call service that is not conscious of the user's accommodation.

  In particular, in the present embodiment, the IP address of the IP-PBX server 11 that is not the operation target and the IP address of the subscriber registration server 16 that is the pair are the IP address of the IP-PBX server 11 that is the operation target and the subscription that is the pair. The IP address of the user registration server 16 is rewritten. As a result, even if the operation target is dynamically changed by expanding the area, the telephone terminal can make a subscriber registration request to the changed operation target without being aware of the change of the operation target. .

  On the other hand, when the area is reduced, there is a case where there is no new IP-PBX server 11 that is in operation. Even in such a case, one optimum operation target is identified and the IP that has been the operation target is specified. The PBX server 11 is characterized in that the subscriber information is taken over from another IP-PBX server 11. The re-registration of the subscriber information can be performed in the same manner as the initial registration of the subscriber information, if necessary. As a result, even if the area is reduced, a single IP-PBX server 11 that is operating can centrally manage subscriber information, and it can be subscribed between a plurality of IP-PBX servers 11 installed in a disaster area or the like. It is possible to quickly share information about a person and provide a call service that is not conscious of the user's accommodation.

  In particular, in the present embodiment, the DNS server sets the IP address of the IP-PBX server 11 that is newly activated after the area reduction and the IP address of the subscriber registration server 16 that is a pair thereof as the original IP address. It is characterized by rewriting to an address. As a result, even if the operation target is dynamically changed by reducing the area, the telephone terminal can make a subscriber registration request to the changed operation target without being aware of the change of the operation target. .

<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 (whole)
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 21 HUB
22 Wireless LAN base station (access point)
23 PBX monitoring unit 24 operation target specifying unit 25 operation control unit 31, 41 IP-Phone
32, 42 IP-PBX registration function part 33 SIM card

Claims (6)

A PBX device for controlling calls from telephone terminals,
A subscriber database storing subscriber information of the telephone terminal for each telephone terminal;
An operation target specifying unit that specifies one operation target among all the PBX devices in the area to which the PBX device belongs;
If the own PBX device is the operation target, the subscriber information of the telephone terminal accommodated by the own PBX device and the telephone terminal accommodated by all the other PBX devices in the area A subscriber information registration management unit for storing subscriber information in the subscriber database;
An operation control unit that operates the PBX device if the PBX device is the operation target and stops the PBX device if the operation is not the operation target;
A PBX device characterized by that. A subscriber registration method in a PBX device for controlling a call from a telephone terminal,
The PBX device
Detecting a new PBX device in operation within the area to which the PBX device belongs;
Identifying one of the PBX device and the new PBX device as an operation target;
If its own PBX device is the operation target,
Receiving subscriber information of the telephone terminal accommodated in the new PBX device from the new PBX device and storing it in a subscriber database;
Continuing the operation of its own PBX device,
If its own PBX device is not the operation target,
Transmitting the subscriber information stored in the subscriber database to the new PBX device;
Executing the step of stopping the PBX device of the device;
The subscriber registration method characterized by the above-mentioned. The PBX device
If the PBX device is not the operation target, the IP address of the PBX device and the IP address of the subscriber registration device paired with the PBX device are newly set to the DNS server. Rewriting the IP address of the PBX device and the IP address of a new subscriber registration device paired with the new PBX device,
The subscriber registration method according to claim 2, wherein: A subscriber registration method in a PBX device for controlling a call from a telephone terminal,
The PBX device
Detecting that all PBX devices including the PBX device are not operating in the area to which the PBX device belongs;
Identifying one new operation target among all the PBX devices;
If its own PBX device is the new operation target,
Receiving subscriber information of telephone terminals accommodated by all other PBX devices in the area and storing them in the subscriber database;
Running its own PBX device;
The subscriber registration method characterized by the above-mentioned. The PBX device
If the PBX device of its own is the new operation target, the IP address of the PBX device that has been rewritten by the DNS server and the subscription that is paired with the PBX device of the DNS server. Rewriting the IP address of the subscriber registration device to the original IP address of its own PBX device and the original IP address of the subscriber registration device paired with its own PBX device,
The subscriber registration method according to claim 4, wherein:   A subscriber registration program for causing a computer to function as the PBX device according to claim 1.

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