JP2014049927A - Telephone system, telephone terminal, subscriber server, and call connection server - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the problem of an incoming call being unanswered when there is nobody around to answer the call.SOLUTION: Information pertaining to a change of call destination is held in a subscriber server 1 and in a call connection server 2 at the destination to which changed (call connection server ID "#1"). Therefore, even when a call connection server 2 at the source from which changed (call connection server ID "#2") is damaged, the call can be transferred to a telephone terminal 4 at the destination to which changed (telephone terminal 4 of telephone number "0123").

Description

  The present invention relates to a telephone system, a telephone terminal, a subscriber server, and a call connection server for preventing extension of connection delay time accompanying change of a destination and invalid use of a connection path.

  There is a system using IMS (IP Multimedia Subsystem) as a standard rule for providing a telephone service in an NGN or a mobile network (see Non-Patent Document 1).

  In this system, in order for a telephone terminal to make and receive calls, subscriber data must be registered in a call connection server (CSCF: Call Session Control Function) in which the telephone terminal is accommodated.

  In a communication network environment using this method, there is an incoming call transfer service as means for making another terminal receive a call in a fixed communication network. East Nippon Telegraph and Telephone Corporation (NTT East) provides a call forwarding service called voice warp (see Non-Patent Document 2).

  In this service, an incoming call is transferred by an operation of designating a transfer destination telephone terminal by a dial operation from the transfer source telephone terminal. Further, the transfer function is canceled by a canceling operation using the dial. To cope with when you go out, you can start / stop transfer and change the transfer destination by dialing with another phone, and you can also use a web browser from a PC or mobile phone that can use the Internet. is there.

  In the call transfer service, a telephone call is connected to a call connection server having subscriber data, that is, a call connection server that accommodates a transfer destination call terminal, and is transferred to a transfer destination designated here. Therefore, there is a possibility that the call connection server may also be damaged in the event of a disaster such as an earthquake disaster. If the telephone terminal becomes unavailable during the earthquake, it can be used to ensure the use of telephone services by transferring it to another telephone terminal. There are cases where it cannot be done. In addition, since the transfer is performed after the call connection reaches the call connection server that accommodates the telephone terminal, there is a problem that the connection delay time is extended and the connection path is invalidly used.

IP Multimedia Subsystem (IMS), 3GPP TS 23.228 Voice Warp, [online], [Search August 20, 2012], Internet <URL: http://flets.com/hikaridenwa/use/pdf/voice.pdf>

  In the call transfer service, a telephone call is connected to a call connection server having subscriber data, that is, a call connection server that accommodates a transfer destination call terminal, and is transferred to a transfer destination designated here. The telephone terminal is accommodated in a call connection server arranged in the same area or a neighboring area. Therefore, there is a possibility that the call connection server may also be damaged in the event of a disaster such as an earthquake disaster. If the telephone terminal becomes unavailable during the earthquake, it can be used to ensure the use of telephone services by transferring it to another telephone terminal. There are cases where it cannot be done. In addition, since the transfer is performed after the call connection reaches the call connection server that accommodates the telephone terminal, there is a problem that the connection delay time is extended and the connection path is invalidly used.

  The present invention has been made in view of the above problems, and an object of the present invention is to prevent the extension of the connection delay time and the invalid use of the connection path due to the change of the destination.

  In order to solve the above problems, a first aspect of the present invention is a telephone system including a subscriber server and a plurality of call connection servers, and the subscriber server accommodates a telephone number and a telephone terminal of the telephone number. The subscriber server database storing a record including the call connection server ID of the call connection server and the telephone terminal of the transfer destination telephone number which is a telephone number different from the call destination telephone number of the call. If the incoming call setting change request including the change source telephone number that is the call destination telephone number and the change destination telephone number that is the transfer destination telephone number is received, it matches the change destination telephone number from the subscriber server database. Search for a record including a telephone number, read a call connection server ID from the record, and a telephone that matches the source telephone number of the subscriber server database The call connection server ID is included as a primary registration destination call connection server ID in the record including the number, and the incoming call setting change request is transmitted to the call connection server of the call connection server ID. If a query including a telephone number that matches the destination telephone number in the subscriber server database is included in the record including the primary registration destination call connection server ID, the primary registration destination call connection server ID On the other hand, if there is no primary registration destination call connection server ID, the call connection server ID is read from the record, and an answer including the call connection server ID or the primary registration destination call connection server ID is transmitted to the call connection server. A subscriber server database processing unit, and each call connection server defines a telephone terminal accommodated in the call connection server. If a call is received from a telephone terminal stored in the call connection server, a call connection server database in which a record including the terminal location information and the telephone number of the telephone terminal is stored is stored. Including an inquiry including the response to the subscriber server, receiving a response from the subscriber server, and forwarding the call toward the call connection server ID or the primary registration destination call connection server ID in the response, When a call is received from another call connection server, a record including a telephone number that matches the destination telephone number of the call is retrieved from the call connection server database, terminal location information is read, and the phone of the terminal location information is retrieved. When the call control unit for receiving a call to the terminal and the incoming call setting change request is received, the change destination telephone number and the change source telephone number are read from the incoming call setting change request. The terminal location information in the record including the phone number that matches the change destination phone number is read from the call connection server database, and the phone number and the terminal location that match the change source phone number are read from the call connection server database. And a call connection server database update unit for storing a record including information.

  For example, the call connection server uses the change source telephone number as a caller telephone number of a call originated from the telephone terminal by a notification from the telephone terminal by an operation to the telephone terminal corresponding to the read terminal location information. It can be set.

For example, if the subscriber server database processing unit receives an incoming call setting change release request including the change source telephone number, the subscriber server database processing unit searches the subscriber server database for a record including a telephone number that matches the change source telephone number. , Deleting the primary registration destination call connection server ID in the record, and transmitting the incoming call setting change release request to the call connection server of the primary registration destination call connection server ID, the call connection server database update unit, If the incoming call setting change cancellation request is received, the change source telephone number is read from the incoming call setting change release request, and the record including the telephone number that matches the change source telephone number is deleted from the call connection server database.

  For example, the subscriber server database processing unit includes an expiration date in the record when the primary registration destination call connection server ID is included in the record, and if the time corresponding to the expiration date has come, the subscription server The telephone number and primary registration destination call connection server ID in the record including the expiration date are read from the user server database, and the incoming call including the telephone number as the change source telephone number for the call connection server of the primary registration destination call connection server ID Send a setting change cancellation request, delete the primary registration destination call connection server ID and expiration date from the record, and if the call connection server database update unit receives the incoming setting change cancellation request, the incoming setting change Reads the change source telephone number from the cancellation request and matches the change source telephone number from the call connection server database. It deletes the record including the.

  For example, a telephone terminal used with a telephone system performs notification to the call connection server for setting a change source telephone number as a caller telephone number of a call originated from the telephone terminal by an operation on the telephone terminal. Be able to.

  The second aspect of the present invention is a subscriber server of a telephone system including a subscriber server and a plurality of call connection servers, wherein the subscriber server is a call connection in which a telephone number and a telephone terminal of the telephone number are accommodated. Subscriber server database in which a record including the server call connection server ID is stored, and the incoming call when the call is received by the telephone terminal of the transfer destination telephone number which is a telephone number different from the destination telephone number of the call If an incoming call setting change request including the change source telephone number that is the destination telephone number and the change destination telephone number that is the transfer destination telephone number is received, the telephone number that matches the change destination telephone number is included from the subscriber server database Search the record, read the call connection server ID from the record, and include the telephone number that matches the source telephone number of the subscriber server database The code includes the call connection server ID as a primary registration destination call connection server ID, transmits the incoming call setting change request to the call connection server of the call connection server ID, and makes an inquiry including the destination telephone number of the call If received from the call connection server, if there is a primary registration destination call connection server ID in a record including a telephone number that matches the destination telephone number of the subscriber server database, the primary registration destination call connection server ID is read out, On the other hand, if there is no primary registration destination call connection server ID, the subscriber server reads the call connection server ID from the record and transmits an answer including the call connection server ID or the primary registration destination call connection server ID to the call connection server. A database processing unit, wherein each call connection server distinguishes telephone terminals accommodated in the call connection server. If a call is received from a telephone connection server database in which a record including the terminal location information and the telephone number of the telephone terminal is stored, and a telephone call is received from the telephone terminal accommodated in the call connection server, an inquiry including the destination telephone number of the call is made. Send to the subscriber server, receive an answer from the subscriber server, forward the call toward the call connection server ID or primary registered call connection server ID in the answer, When a call is received from the call connection server, a record including a telephone number that matches the destination telephone number of the call is retrieved from the call connection server database, terminal location information is read, and a call is made to the telephone terminal of the terminal location information. When receiving the incoming call setting change request and the call control unit for receiving the incoming call, the change destination telephone number and the change source telephone number are read from the incoming call setting change request, and the call A terminal location information in a record including a phone number that matches the change destination phone number is read from the connection server database, and a record that contains the phone number that matches the change source phone number and the terminal location information in the call connection server database And a call connection server database update unit for storing.

  A third aspect of the present invention is a call connection server of a telephone system including a subscriber server and a plurality of call connection servers, wherein the subscriber server is a call connection in which a telephone number and a telephone terminal of the telephone number are accommodated. Subscriber server database in which a record including the server call connection server ID is stored, and the incoming call when the call is received by the telephone terminal of the transfer destination telephone number which is a telephone number different from the destination telephone number of the call If an incoming call setting change request including the change source telephone number that is the destination telephone number and the change destination telephone number that is the transfer destination telephone number is received, the telephone number that matches the change destination telephone number is included from the subscriber server database Search the record, read the call connection server ID from the record, and include the telephone number that matches the source telephone number of the subscriber server database The code includes the call connection server ID as a primary registration destination call connection server ID, transmits the incoming call setting change request to the call connection server of the call connection server ID, and makes an inquiry including the destination telephone number of the call If received from the call connection server, if there is a primary registration destination call connection server ID in a record including a telephone number that matches the destination telephone number of the subscriber server database, the primary registration destination call connection server ID is read out, On the other hand, if there is no primary registration destination call connection server ID, the subscriber server reads the call connection server ID from the record and transmits an answer including the call connection server ID or the primary registration destination call connection server ID to the call connection server. A database processing unit, wherein the call connection server distinguishes telephone terminals accommodated in the call connection server. If a call is received from a telephone terminal stored in the call connection server and a call connection server database in which a record including the terminal location information and the telephone number of the telephone terminal is stored, an inquiry including the destination telephone number of the call is received. Send to the subscriber server, receive an answer from the subscriber server, forward the call toward the call connection server ID or primary registered call connection server ID in the answer, When a call is received from the call connection server, a record including a telephone number that matches the destination telephone number of the call is retrieved from the call connection server database, terminal location information is read, and a call is made to the telephone terminal of the terminal location information. A call control unit for receiving the incoming call, and if the incoming call setting change request is received, a change destination telephone number and a change source telephone number are read from the incoming call setting change request, and the call connection The terminal location information in the record including the phone number that matches the change destination phone number is read from the connection server database, and the call connection server database includes the phone number that matches the change source phone number and the terminal location information. And a call connection server database update unit for storing.

  According to the present invention, it is possible to prevent the extension of the connection delay time and the invalid use of the connection path accompanying the change of the destination.

It is a block diagram of the telephone system which concerns on this Embodiment. 2 is a block diagram showing a configuration of a subscriber server 1. FIG. 3 is a block diagram showing a configuration of each call connection server 2. FIG. It is a sequence diagram which shows operation | movement when a subscriber subscribes to the telephone service using a telephone system. It is a sequence diagram which shows the operation | movement which makes an incoming call in a telephone system. It is a sequence diagram which shows the operation | movement which changes an incoming call setting in a telephone system. It is a sequence diagram which shows the operation | movement which cancels the change of an incoming call setting in a telephone system.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a configuration diagram of a telephone system according to the present embodiment.
The telephone system is a telephone system including a subscriber server 1 and a plurality of call connection servers 2 and authentication servers 3 connected to the subscriber server 1 via communication lines. The plurality of call connection servers 2 are connected in a network, for example. That is, two of the plurality of call connection servers 2 are connected directly or indirectly via one or more call connection servers 2. Each call connection server 2 accommodates (connects) a plurality of telephone terminals 4.

  For example, the call connection server 2 to which the call connection server ID “# 1” for distinguishing the call connection server 2 is assigned includes the telephone terminal 4 to which the telephone number “0123” is assigned and other telephone terminals 4. Has been. Hereinafter, the correspondence between such a call connection server ID and the call connection server 2 is “call connection server 2 of call connection server ID“ # 1 ””, “call connection server ID“ # 1 ”of call connection server 2”. Express like this. Further, the correspondence between such a telephone number and the telephone terminal 4 is expressed as “the telephone terminal 4 of the telephone number“ 0123 ”” or “the telephone number“ 0123 ”of the telephone terminal 4”.

In addition, the call connection server 2 with another call connection server ID “# 2” accommodates the telephone terminal 4 having the telephone number “4567” and the other telephone terminals 4.
The authentication server 3 can be connected from a telephone terminal 4, a personal computer (not shown), or a web browser of a mobile phone.

FIG. 2 is a block diagram showing the configuration of the subscriber server 1.
The subscriber server 1 includes a subscriber server database 11 and a subscriber server database processing unit 12.

  The subscriber server database 11 stores a record including a telephone number and a call connection server ID of a call connection server in which a telephone terminal having the telephone number is accommodated.

  The record including the telephone number “0123” includes the call connection server ID “# 1”. This is because the telephone terminal 4 having the telephone number “0123” has the call connection server ID “# 1” as shown in FIG. "# 1" is stored in the call connection server 2.

  Further, the record including the telephone number “4567” includes the call connection server ID “# 2”. This is because the telephone terminal 4 having the telephone number “4567” is connected to the call connection server as shown in FIG. It shows that it is accommodated in the call connection server 2 with ID “# 2”.

  Further, the record may include a primary registration destination call connection server ID and an expiration date.

  The record including the telephone number “4567” includes the primary registration destination call connection server ID “# 1”. This is because the telephone terminal 4 that receives a call instead of the telephone terminal 4 having the telephone number “4567” receives the call. This indicates that the call is stored in the call connection server 2 with the primary registration destination call connection server ID “# 1”.

  The record including the telephone number “4567” includes the expiration date “2/28 15:00”. This is because another telephone terminal 4 that is not the telephone terminal 4 having the telephone number “4567” replaces the call. This indicates that the incoming call is performed until the expiration date “2/28 15:00”.

  The subscriber server database processing unit 12 stores records in the subscriber server database 11 and updates records. Further, the subscriber server database processing unit 12 answers the inquiry from the call connection server 2 using the subscriber server database 11.

FIG. 3 is a block diagram showing the configuration of each call connection server 2.
The call connection server 2 includes a call connection server database 21, a call control unit 22, and a call connection server database update unit 23.

  The call connection server database 21 stores a record including terminal location information for distinguishing the telephone terminal 4 accommodated in the call connection server 2 including the call connection server database 21 and the telephone number of the telephone terminal 4. .

  One of the two records including the terminal position information “Terminal A” includes the telephone number “0123”. This is because the telephone terminal 4 having the telephone number “0123” indicates that the terminal position information “Terminal A” is It is shown that it is distinguished from other telephone terminals 4.

  The other of the two records including the terminal location information “terminal A” includes a telephone number “4567”, which is a telephone terminal that receives a call instead of the telephone terminal 4 having the telephone number “4567”. 4 indicates that the terminal position information “terminal A” is distinguished from other telephone terminals 4. That is, the telephone terminal 4 that receives a call instead of the telephone terminal 4 having the telephone number “4567” is the telephone terminal 4 having the telephone number “0123”.

  The call control unit 22 uses the call connection server database 21 to specify a call destination terminal.

  The call connection server database update unit 23 stores a record in the call connection server database 21 and updates the record.

(Telephone system operation)
FIG. 4 is a sequence diagram showing an operation when a subscriber subscribes to a telephone service using the telephone system.

  When the subscriber subscribes to the telephone service, the subscriber server database processing unit 12 of the subscriber server 1 includes the telephone number of the telephone terminal 4 used by the subscriber and the call connection server in which the telephone terminal 4 is accommodated. A record including the call connection server ID is stored (registered) in the subscriber server database 11 (S1).

  Next, the subscriber's telephone terminal 4 transmits a registration signal to the call connection server 2 in which the telephone terminal 4 is accommodated, for example, when the power is turned on (S11) (S13).

  When the call connection server database update unit 23 of the call connection server 2 receives the registration signal, it requests the subscriber server 1 for subscriber data (S15).

  When the subscriber server database processing unit 12 of the subscriber server 1 receives the request, it transmits the subscriber data including the telephone number in the record stored in S1 to the call connection server 2 (S17). If the call connection server ID of the call connection server 2 that transmitted the request is different from the call connection server ID in the record, the subscriber server database processing unit 12 updates the latter call connection ID with the former call connection ID. May be.

  If the call connection server database update unit 23 of the call connection server 2 receives the subscriber data, the call connection server database update unit 23 reads the telephone number and includes the terminal location information and the telephone number for distinguishing the telephone terminal that transmitted the registration signal of S13. The record is stored in the call connection server database 21 (S19).

  Thus, as the number of subscribers increases, records are stored in each subscriber server database 11 and call connection server database 21.

FIG. 5 is a sequence diagram showing an operation for receiving a call in the telephone system.
For example, when there is a call from a certain telephone terminal 4 and the call connection server 2 accommodating the telephone terminal 4 receives the call (S21), an inquiry including the destination telephone number of the call is transmitted to the subscriber server 1 (S23). ).

  When the subscriber server database processing unit 12 of the subscriber server 1 receives the inquiry, the subscriber server database processing unit 12 reads the destination telephone number, and stores the primary registration destination in the record including the telephone number that matches the destination telephone number in the subscriber server database 11. If there is a call connection server ID, the primary registration destination call connection server ID is read. On the other hand, if there is no primary registration destination call connection server ID, the call connection server ID is read from the record, and the call connection server ID or primary registration is read. An answer including the previous call connection server ID is transmitted to the call connection server 2 (S25).

  The call control unit 22 of the call connection server 2 receives the answer and transfers the call to the call connection server 2 of the call connection server ID or the primary registration destination call connection server ID in the answer (S27).

When the call control unit 22 of the call connection server 2 having the call connection server ID or the primary registration destination call connection server ID in the answer receives the call transferred in this way from another call connection server 2, the call connection server database From 21, a record including a telephone number that matches the destination telephone number of the call is retrieved, terminal location information is read out, and the telephone terminal 4 having the terminal location information receives the call (S 29).
Therefore, the call eventually arrives at the telephone terminal 4 of the destination telephone number.

FIG. 6 is a sequence diagram showing an operation of changing the incoming call setting in the telephone system.
For example, consider a case where the area of the telephone terminal 4 with the telephone number “4567” is damaged by an earthquake disaster, and the user of the telephone terminal 4 evacuates to a relative's house where the telephone terminal 4 with the telephone number “0123” is installed. .

  In this case, it is necessary to receive (transfer) the call having the telephone number “4567” to the telephone terminal 4 having the telephone number “0123”.

  That is, the call destination telephone number (in the above example, the telephone number “4567”) is different from the telephone terminal 4 of the forwarding destination telephone number (in the above example, the telephone number “0123”). The call must be transferred (incoming).

  In such a case, the user of the telephone terminal 4 with the telephone number “4567”, for example, before the evacuation, for example, the change source telephone number as the telephone number “4567” (call destination telephone number) and the telephone number “0123” The change destination telephone number (transfer destination telephone number) is input to the telephone terminal 4 having the telephone number “4567” (S31).

  The telephone terminal 4 transmits an incoming call setting change request including the input change source telephone number “4567” and the change destination telephone number “0123” to the authentication server 3 (S33).

  It is to be noted that the user connects to the special number for changing the transfer destination with a mobile phone or the like, and dials the telephone number or the change destination telephone number via the guidance, so that the incoming call setting change request is transmitted to the authentication server 3. It may be.

  The incoming call setting change request may include an expiration date (for example, 2/28 15:00) according to the evacuation period. The incoming call setting change request may be transmitted from a personal computer or a web browser of a mobile phone.

  The authentication server 3 receives the incoming setting change request and performs authentication. No authentication method is specified. After the authentication, the authentication server 3 transmits the received incoming call setting change request to the subscriber server 1 (S35).

  When the subscriber server database processing unit 12 of the subscriber server 1 receives the incoming setting change request, the subscriber server database processing unit 12 reads the change source telephone number “4567” and the change destination telephone number “0123”, and reads the change destination telephone from the subscriber server database 11. The record including the telephone number that matches the number “0123” is searched, the call connection server ID “# 1” is read from the record, and the telephone number that matches the change source telephone number “4567” in the subscriber server database 11 is included. The record includes the call connection server ID “# 1” as the primary registration destination call connection server ID (S37), and requests the call connection server 2 of the primary registration destination call connection server ID “# 1” to receive the incoming call setting change. Transmit (S39).

  In S37, the call connection server database update unit 23 includes the expiration date in the record if the expiration date is included in the incoming call setting change request.

  The call connection server database update unit 23 of the call connection server 2 that has received the incoming call setting change request in S39 reads the change destination telephone number “0123” and the change source telephone number “4567” from the incoming call setting change request, and calls the call connection server database. 21 reads out the terminal location information “terminal A” in the record including the telephone number that matches the change destination telephone number “0123”, and stores the telephone number and the terminal that match the change source telephone number “4567” in the call connection server database 21. A record including the location information “terminal A” is stored (S41), and the telephone terminal 4 having the change destination telephone number “0123” is notified that the incoming call setting has been changed (S43).

  For example, the telephone terminal 4 displays the notification content on its own display. Note that the telephone terminal 4 is not necessarily provided with a display, and therefore S43 may not be executed.

  Next, with reference to FIG. 5, description will be given of an operation in which a call having the change source telephone number “4567” as the destination telephone number is received by the telephone terminal 4 having the change destination telephone number “0123”.

  For example, there is an outgoing call from the telephone terminal 4 accommodated in the call connection server 2 having a call connection server ID other than the call connection server IDs “# 1” and “# 2”, and the call connection server 2 accommodating the telephone terminal 4 is When the call is received (S21), the call control unit 22 of the call connection server 2 transmits an inquiry including the call destination telephone number “4567” to the subscriber server 1 (S23).

  Since the subscriber server 1 has a record in the subscriber server database 11 that includes a telephone number that matches the destination telephone number “4567”, and this record has the primary registration destination call connection server ID “# 1”. The primary registration destination call connection server ID “# 1” is read, and an answer including the primary registration destination call connection server ID “# 1” is transmitted to the call connection server 2 (S25).

  The call control unit 22 of the call connection server 2 receives the answer and transfers the call to the call connection server 2 of the primary registration destination call connection server ID “# 1” in the answer (S27).

  The call control unit 22 of the call connection server 2 with the primary registration destination call connection server ID “# 1” searches the call connection server database 21 for a record including a telephone number that matches the call destination telephone number “4567”. Then, the terminal location information “terminal A” is read, and the telephone terminal 4 corresponding to the terminal location information “terminal A”, that is, the telephone terminal 4 with the telephone number “0123” is called (S29).

  That is, the change destination telephone number “0123” is not stored in the call connection server 2 with the call connection server ID “# 2”, but is stored in the call connection server 2 with the call connection server ID “# 1”. Therefore, even if the call connection server 2 with the call connection server ID “# 2” is installed in the area of the telephone terminal 4 with the telephone number “4567” and is similarly damaged, the telephone with the change destination telephone number “0123” The terminal 4 can receive a call.

  Note that a call having the telephone number “0123” as the destination telephone number arrives at the telephone terminal 4 having the telephone number “0123” as usual. Further, as described above, a call to the telephone terminal 4 having the telephone number “4567” cannot be received, but the call may be made as usual.

Next, transmission from the telephone terminal 4 with the telephone number “0123” will be described.
(A) For example, when the user of the telephone terminal 4 with the telephone number “4567” makes a call from the telephone terminal 4 with the telephone number “0123” and wants to use the telephone number “4567” as the caller telephone number, the telephone terminal 4 On the other hand, a predetermined operation (for example, dial operation) is performed. Thereby, the telephone terminal 4 notifies the call connection server 2 of the call connection server ID “# 1” that this operation has been performed.

  If the call connection server 2 with the call connection server ID “# 1” does not receive this notification, it sets the telephone number “0123” as the call source telephone number, while if it receives the notification, The telephone number “4567” is set instead of the telephone number “0123”. Therefore, for example, the telephone number “4567” is displayed as the caller telephone number on the telephone terminal 4 that receives the call by the calling number display function.

  (B) Or, when the user of the telephone terminal 4 wants to use the telephone number “0123” as the caller telephone number for the telephone terminal 4 with the telephone number “0123”, the first operation is performed to obtain the telephone number “4567”. "Is used as the caller telephone number, the second operation is performed, whereby the telephone terminal 4 notifies the operation content to the call connection server 2 of the call connection server ID" # 1 ".

  The call connection server 2 with the call connection server ID “# 1” sets the call source telephone number to the telephone number “0123” if this notification is a notification that the first operation has been performed. However, if it is a notification that the second operation has been performed, the call source telephone number is set to the telephone number “4567”. Therefore, for example, the telephone number “0123” or “4567” is displayed as the caller telephone number on the telephone terminal 4 that receives the call by the calling number display function.

  Here, the description has been given of the case where the call source telephone number is set to one of the two telephone numbers “0123” and “4567”. Can be set to a desired telephone number.

  If there is no special operation and no notification is given, the call source telephone number is set to the telephone number “0123”. On the other hand, if there is an operation and notification is given, The caller telephone number may be a telephone number corresponding to the notification content.

  The telephone numbers “0123” and “4567” are examples, and other telephone numbers may be used.

  FIG. 7 is a sequence diagram showing an operation of canceling the incoming call setting change in the telephone system.

  For example, when the area of the telephone terminal 4 with the telephone number “4567” recovers from the earthquake disaster and the user of the telephone terminal 4 returns from the relative's house, a call with the telephone number “4567” as the destination telephone number Needs to be received by the telephone terminal 4 having the telephone number “4567” as before.

  In such a case, after returning, the user of the telephone terminal 4 having the telephone number “4567” inputs the change source telephone number “4567” to the telephone terminal 4 having the telephone number “4567” (S51).

  The telephone terminal 4 transmits an incoming call setting change release request including the input source telephone number “4567” to the authentication server 3 (S53).

  After the authentication, the authentication server 3 transmits the received incoming call setting change release request to the subscriber server 1 (S55).

  When the subscriber server database processing unit 12 of the subscriber server 1 receives the incoming call setting change release request, the subscriber server database processing unit 12 reads the change source telephone number and records from the subscriber server database 11 the telephone number that matches the change source telephone number. The primary registration destination call connection server ID in the record is deleted (S57), and the incoming call setting change release request is transmitted to the call connection server 2 of the primary registration destination call connection server ID (S59).

  In S57, the subscriber server database processing unit 12 deletes the expiration date if the expiration date is included in the record.

When the call connection server database update unit 23 of the call connection server 2 receives the incoming call setting change release request, the call connection server database update unit 23 reads the change source telephone number and records from the call connection server database 21 the telephone number that matches the change source telephone number. Is deleted (S61), and the telephone terminal 4 with the telephone number “0123” is notified that the incoming call setting change has been canceled (S63).
In addition, S63 does not need to be performed like S43.

Next, a process when the time corresponding to the expiration date comes will be described.
When the time corresponding to the expiration date comes, the subscriber server database processing unit 12 of the subscriber server 1 obtains the primary registered destination call connection server ID and the expiration date in the record including the expiration date from the subscriber server database 11. The incoming call setting change cancellation request including the telephone number in the record as the change source telephone number is transmitted to the call connection server 2 of the primary registration destination call connection server ID.

  When the call connection server database update unit 23 of the call connection server 2 receives the incoming call setting change release request, the call connection server database update unit 23 reads the change source telephone number and records from the call connection server database 21 the telephone number that matches the change source telephone number. Is deleted, and the telephone terminal 4 having the telephone number “0123” is notified that the transfer setting for transferring the call to the telephone terminal 4 has been canceled.

  Therefore, according to the telephone system of the present embodiment, information related to the change of the destination is held in the subscriber server 1 and the call connection server 2 of the change destination (call connection server 2 with the call connection server ID “# 1”). Therefore, even when the call source server 2 (call connection server 2 with the call connection server ID “# 2”) of the change source is damaged, the phone terminal 4 (phone number “0123”) of the change destination is changed. 4) can be received. Further, since the call does not need to go through the call connection server 2 of the change source (call connection server 2 with the call connection server ID “# 2”), the connection delay time is increased due to the change of the destination, and the connection route is invalidated. Use can be prevented.

  In addition, because the incoming call setting change cancellation request or when the expiration date has come, the change of the incoming call destination can be canceled, so that the call can be received by the telephone terminal 4 of the change source as before the disaster. it can.

  Further, since the change source telephone number can be transmitted as the caller telephone number even from the change destination telephone terminal 4, the change destination telephone terminal 4 can be used in the same manner as the change source telephone terminal 4. it can.

  A computer program for causing a computer to function as the subscriber server 1, the call connection server 2, or the telephone terminal 4 is recorded on a computer-readable recording medium such as a semiconductor memory, a magnetic disk, an optical disk, a magneto-optical disk, or a magnetic tape. It can also be widely distributed by being transmitted via a communication network such as the Internet.

DESCRIPTION OF SYMBOLS 1 Subscriber server 2 Call connection server 3 Authentication server 4 Telephone terminal 11 Subscriber server database 12 Subscriber server database process part 21 Call connection server database 22 Call control part 23 Call connection server database update part

Claims (8)

A telephone system including a subscriber server and a plurality of call connection servers,
The subscriber server is
A subscriber server database in which a record including a telephone connection number and a call connection server ID of a call connection server in which a telephone terminal of the telephone number is accommodated is stored;
When the call is received by the telephone terminal of the forwarding destination telephone number that is a telephone number different from the destination telephone number of the call, the changing source telephone number that is the destination telephone number and the changing destination that is the forwarding destination telephone number If an incoming call setting change request including a telephone number is received, a record including a telephone number that matches the changed telephone number is retrieved from the subscriber server database, and a call connection server ID is read from the record, and the subscriber server The call connection server ID is included as a primary registration destination call connection server ID in a record including a telephone number that matches the change source telephone number in the database, and the incoming call setting change request is made to the call connection server of the call connection server ID And the subscriber server database receives the inquiry including the destination telephone number of the call from the call connection server. If there is a primary registration destination call connection server ID in a record that includes a telephone number that matches the destination phone number, the primary registration destination call connection server ID is read, while if there is no primary registration destination call connection server ID, A subscriber server database processing unit that reads the call connection server ID from the record and transmits an answer including the call connection server ID or the primary registration destination call connection server ID to the call connection server;
Each of the call connection servers is
A call connection server database in which a record including terminal location information for distinguishing telephone terminals accommodated in the call connection server and a telephone number of the telephone terminal is stored;
If a call is received from the telephone terminal accommodated in the call connection server, an inquiry including the destination telephone number of the call is transmitted to the subscriber server, a response is received from the subscriber server, and the call in the response is received. If the call is transferred to the call connection server of the connection server ID or the primary registration destination call connection server ID, and if a call is received from another call connection server, the call destination telephone number is read from the call connection server database. A call control unit that retrieves a record including a telephone number that matches, reads out the terminal location information, and causes the telephone terminal of the terminal location information to receive a call;
If the incoming call setting change request is received, a change destination telephone number and a change source telephone number are read from the incoming call setting change request, and a terminal in a record including a telephone number that matches the change destination telephone number from the call connection server database A telephone system comprising: a call connection server database update unit that reads position information and stores a record including a telephone number that matches the change source telephone number and the terminal position information in the call connection server database. The call connection server is:
The change source telephone number can be set as a caller telephone number of a call originated from the telephone terminal by a notification from the telephone terminal by an operation to the telephone terminal corresponding to the read terminal location information. The telephone system according to claim 1. The subscriber server database processing unit
If an incoming call setting change release request including the change source telephone number is received, a record including a telephone number that matches the change source telephone number is retrieved from the subscriber server database, and a primary registered destination call connection server in the record Delete the ID, send the incoming call setting change release request to the call connection server of the primary registration destination call connection server ID,
The call connection server database update unit includes:
When the incoming call setting change cancellation request is received, the change source telephone number is read from the incoming call setting change release request, and the record including the telephone number that matches the change source telephone number is deleted from the call connection server database. The telephone system according to claim 1. The subscriber server database processing unit
If the record includes the expiration date when the primary registration destination call connection server ID is included in the record, and the time corresponding to the expiration date has come, the record containing the expiration date from the subscriber server database Phone number and primary registration destination call connection server ID are read out, and an incoming call setting change release request including the phone number as a change source phone number is transmitted to the call connection server of the primary registration destination call connection server ID, and from the record Delete the primary registration destination call connection server ID and expiration date,
The call connection server database update unit includes:
When the incoming call setting change cancellation request is received, the change source telephone number is read from the incoming call setting change release request, and the record including the telephone number that matches the change source telephone number is deleted from the call connection server database. The telephone system according to claim 1. A telephone terminal for use with the telephone system according to claim 1,
A feature is that notification to a call connection server for setting a change source telephone number as a caller telephone number of a call originating from the telephone terminal can be performed by an operation on the telephone terminal. Phone terminal. A subscriber server of a telephone system including a subscriber server and a plurality of call connection servers,
The subscriber server is
A subscriber server database in which a record including a telephone connection number and a call connection server ID of a call connection server in which a telephone terminal of the telephone number is accommodated is stored;
When the call is received by the telephone terminal of the forwarding destination telephone number that is a telephone number different from the destination telephone number of the call, the changing source telephone number that is the destination telephone number and the changing destination that is the forwarding destination telephone number If an incoming call setting change request including a telephone number is received, a record including a telephone number that matches the changed telephone number is retrieved from the subscriber server database, and a call connection server ID is read from the record, and the subscriber server The call connection server ID is included as a primary registration destination call connection server ID in a record including a telephone number that matches the change source telephone number in the database, and the incoming call setting change request is made to the call connection server of the call connection server ID And the subscriber server database receives the inquiry including the destination telephone number of the call from the call connection server. If there is a primary registration destination call connection server ID in a record that includes a telephone number that matches the destination phone number, the primary registration destination call connection server ID is read, while if there is no primary registration destination call connection server ID, A subscriber server database processing unit that reads the call connection server ID from the record and transmits an answer including the call connection server ID or the primary registration destination call connection server ID to the call connection server;
Each of the call connection servers is
A call connection server database in which a record including terminal location information for distinguishing telephone terminals accommodated in the call connection server and a telephone number of the telephone terminal is stored;
If a call is received from the telephone terminal accommodated in the call connection server, an inquiry including the destination telephone number of the call is transmitted to the subscriber server, a response is received from the subscriber server, and the call in the response is received. If the call is transferred to the call connection server of the connection server ID or the primary registration destination call connection server ID, and if a call is received from another call connection server, the call destination telephone number is read from the call connection server database. A call control unit that retrieves a record including a telephone number that matches, reads out the terminal location information, and causes the telephone terminal of the terminal location information to receive a call;
If the incoming call setting change request is received, a change destination telephone number and a change source telephone number are read from the incoming call setting change request, and a terminal in a record including a telephone number that matches the change destination telephone number from the call connection server database A call connection server database update unit that reads out location information and stores in the call connection server database a record that includes a telephone number that matches the source telephone number and the terminal location information. Subscriber server. A call connection server of a telephone system including a subscriber server and a plurality of call connection servers,
The subscriber server is
A subscriber server database in which a record including a telephone connection number and a call connection server ID of a call connection server in which a telephone terminal of the telephone number is accommodated is stored;
When the call is received by the telephone terminal of the forwarding destination telephone number that is a telephone number different from the destination telephone number of the call, the changing source telephone number that is the destination telephone number and the changing destination that is the forwarding destination telephone number If an incoming call setting change request including a telephone number is received, a record including a telephone number that matches the changed telephone number is retrieved from the subscriber server database, and a call connection server ID is read from the record, and the subscriber server The call connection server ID is included as a primary registration destination call connection server ID in a record including a telephone number that matches the change source telephone number in the database, and the incoming call setting change request is made to the call connection server of the call connection server ID And the subscriber server database receives the inquiry including the destination telephone number of the call from the call connection server. If there is a primary registration destination call connection server ID in a record that includes a telephone number that matches the destination phone number, the primary registration destination call connection server ID is read, while if there is no primary registration destination call connection server ID, A subscriber server database processing unit that reads the call connection server ID from the record and transmits an answer including the call connection server ID or the primary registration destination call connection server ID to the call connection server;
The call connection server is:
A call connection server database in which a record including terminal location information for distinguishing telephone terminals accommodated in the call connection server and a telephone number of the telephone terminal is stored;
If a call is received from the telephone terminal accommodated in the call connection server, an inquiry including the destination telephone number of the call is transmitted to the subscriber server, a response is received from the subscriber server, and the call in the response is received. If the call is transferred to the call connection server of the connection server ID or the primary registration destination call connection server ID, and if a call is received from another call connection server, the call destination telephone number is read from the call connection server database. A call control unit that retrieves a record including a telephone number that matches, reads out the terminal location information, and causes the telephone terminal of the terminal location information to receive a call;
If the incoming call setting change request is received, a change destination telephone number and a change source telephone number are read from the incoming call setting change request, and a terminal in a record including a telephone number that matches the change destination telephone number from the call connection server database A call connection server database update unit that reads out location information and stores in the call connection server database a record that includes a telephone number that matches the source telephone number and the terminal location information. Call connection server.   A computer program for causing a computer to function as the telephone terminal according to claim 5, the subscriber server according to claim 6, or the call connection server according to claim 7.

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