JP2011101130A - Incoming call system, subscriber server in the same, and incoming call method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an incoming call abbreviation dial service without altering a PSTN, in an incoming call system including an IP network. <P>SOLUTION: Inside the IP network of the incoming call system, an AS 10 having an abbreviation dial DB indicating the incoming call dial number of a general purpose number corresponding to an abbreviation dial number for each abbreviation dial number is prepared. Then, when receiving the INVITE message of the abbreviation dial number (#ABCD) from a call originating terminal, the AS 10 returns the incoming call dial number of the general purpose number (0A-J) corresponding to the abbreviation dial number, and transmits the INVITE message of the incoming call dial number to a relay server 40. The relay server 40 converts the INVITE message (0A-J) to an IAM message and transfers it to the subscriber exchange 60 of the PSTN. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an incoming call speed dial service.

  Conventionally, by registering the abbreviated dial number (number consisting of “special number” and “N-digit number”) of the other party's terminal device in the subscriber exchange, the subscriber exchange can receive the incoming abbreviated dial number. There is an incoming call abbreviated dial service that connects to the terminal device of the other party (see Non-Patent Document 1). This incoming call speed dial service is a service for public switched telephone network (PSTN) and ISDN network (Integrated Services Digital Network) (hereinafter collectively referred to as PSTN). It is a service that allows you to set up an incoming speed dial that can be used in common. In addition, the regional unit use type is a service that can set an incoming call speed dial that can be used only within the region.

  Here, an outline of a conventional incoming call speed dial service will be described. First, (1) the calling terminal sends a speed dial ("special number + N digits"). (2) The subscriber exchange that has received this converts “special number + N digits” into a destination dial number (a general-purpose dial number starting from “0”, hereinafter referred to as 0A-J). (3) Each exchange in the network performs a routing process using the converted destination dial number (0A-J) and arrives at the receiving terminal.

NTT East, INS # dial, [online], [October 20, 2009 search], Internet, <URL: http://www.ntt-east.co.jp/ISDN/64/optional/dialin/service2 .html>

  In recent years, a telephone connection service using an IP network such as an IP (Internet Protocol) telephone is also provided. In such an IP network, when an incoming speed dial service is to be provided, for example, as shown in FIG. 7, a speed dial from the terminal device 80A of the IP network subscriber to the terminal device 80B of the PSTN subscriber is performed. The number “#ABCD (special number + N digits)” cannot be converted in the IP network. Therefore, it is necessary to perform number conversion to 0A-J on the PSTN side. However, the current PSTN subscriber exchange does not respond to inquiries about number conversion from terminals other than its own terminal. In other words, the PSTN subscriber exchange does not have a mechanism for responding to the number conversion for the incoming dialing number from other networks such as the IP network. Therefore, when a call is made from a terminal device of the IP network to a terminal device of a PSTN subscriber, the incoming call speed dial service cannot be provided. In addition, the subscriber server in the IP network does not have a conversion function for the abbreviated dial number “#ABCD (special number + N digits)” in the first place. Therefore, there is a problem that it is impossible to provide an incoming call speed dial service when making a call between the terminal devices 80 in the IP network. SUMMARY OF THE INVENTION An object of the present invention is to provide an incoming call speed dial service for a terminal device that transmits via an IP network.

  In order to solve the above-mentioned problem, the invention according to claim 1 is a subscriber server for receiving an INVITE message of a destination dial number from a source terminal device in an IP (Internet Protocol) network, and a subscriber A relay server that forwards the INVITE message to a subscriber server in the IP network or a relay switch in the public line network when receiving an INVITE message of the destination dial number from the server, and performs a connection process with the terminal device of the destination A number that inquires the number search means for the destination dial number indicated by the logical ID when receiving an INVITE message having identification information indicating that it is a logical ID of the incoming dial number. When the INVITE message of the destination dial number indicated by the logical ID is received from the inquiry means and the number inquiry means, For each logical ID, reference is made to the logical ID information indicating the destination dial number indicated by the logical ID, the destination dial number indicated by the logical ID of the INVITE message is searched, and the INVITE message of the searched incoming dial number is retrieved. The subscriber server is provided with number search means to be returned to the number inquiry means and connection processing means for transmitting the INVITE message to the relay server when receiving the INVITE message of the destination dial number from the number search means.

  According to the sixth aspect of the present invention, in an IP (Internet Protocol) network, a subscriber server that receives an INVITE message of a destination dial number from a source terminal device, and an INVITE of the destination dial number from the subscriber server When receiving a message, the subscriber server in the receiving system includes a relay server that forwards the INVITE message to a subscriber server in the IP network or a relay switch in the public line network, and performs incoming processing to the terminal device of the destination. Receiving an INVITE message with a logical ID having identification information indicating that it is a logical ID, and referring to the logical ID information indicating the destination dial number indicated by the logical ID for each logical ID, A step of searching for the called dial number indicated by the logical ID of the message and an INVITE message of the called dial number are transmitted to the relay server. And incoming wherein the performing the steps.

  Thus, the subscriber server installed in the IP network refers to the information indicating the logical ID such as the abbreviated incoming dial number and searches for the incoming dial number indicated by the logical ID of the INVITE message. Send the number INVITE message to the relay server. Therefore, the incoming call system can provide an incoming call speed dial service to a terminal device connected via the IP network. The identification information indicating the logical ID is, for example, “#”.

  In the invention according to claim 2, the logical ID information in the subscriber server according to claim 1 is the logical ID used in the area to which the dial number belongs for each area to which the dial number of the terminal device of the transmission source belongs. , And information indicating a destination dial number indicated by the logical ID.

  According to a fifth aspect of the present invention, in the incoming call system according to the third or fourth aspect, the logical ID information is used for each area to which the dial number of the terminal device of the caller belongs, in the area to which the dial number belongs. Information indicating a logical ID to be received and a destination dial number indicated by the logical ID.

  In this way, the incoming call system can provide an area-based incoming call speed dial service.

  According to the third aspect of the present invention, in the IP network, a subscriber server that receives an INVITE message of a destination dial number from a source terminal device, and an INVITE message of a destination dial number from the subscriber server are received. An incoming call system including a relay server that forwards an INVITE message to a subscriber server in an IP network or a relay exchange in a public line network and performs a connection process with a terminal device at a destination, for each logical ID A storage unit for storing logical ID information indicating a destination dial number indicated by the logical ID, and a logical ID INVITE message from the subscriber server when the logical ID INVITE message is received from the subscriber server. An application server provided with a number search means for searching for the called dial number indicated by the ID and returning it to the subscriber server, and an identification indicating the logical ID. When an INVITE message with a logical ID having information is received, a number inquiry means for inquiring the destination dial number indicated by the logical ID to the application server, and an INVITE message with the destination dial number indicated by the logical ID is received from the application server. In this case, the incoming call system is characterized by having a subscriber server provided with a connection processing means for transmitting the INVITE message of the destination dial number to the relay server, and the relay server.

  In this way, since the subscriber server of the receiving system only needs to use a common application server, it is not necessary for each subscriber server of the receiving system to have logical ID information.

  According to a fourth aspect of the present invention, in the incoming call system according to the third aspect, the incoming call system includes a plurality of application servers, and each of the storage units of the plurality of application servers stores the same logical ID information. And

  By doing in this way, the application server utilized for every subscriber server in a receiving system can be made different. Further, even if any application server in the incoming call system fails, the incoming call speed dial service can be provided by using another application server.

  ADVANTAGE OF THE INVENTION According to this invention, an incoming call speed-dial service can be provided with respect to the terminal device which transmits via IP network.

It is the figure which showed the outline | summary of the incoming call system of this Embodiment. It is a figure showing an example of composition of an incoming call system of this embodiment. FIG. 3 is a sequence diagram showing an incoming call process of the incoming call system of FIG. 2. FIG. 3 is a sequence diagram showing an incoming call process of the incoming call system of FIG. 2. It is a figure showing an example of composition of an incoming call system of this embodiment. It is the figure which showed the structural example of the subscriber server of FIG. It is the figure which showed the outline | summary of the conventional incoming call system.

  Hereinafter, modes for carrying out the present invention (hereinafter referred to as embodiments) will be described. The incoming call system according to the present embodiment includes an IP network and a PSTN as shown in FIG. This IP network and PSTN are connected by a relay server 40. This IP network includes an AS (application server) 10 that converts a shortened incoming dial number (logical ID) into an incoming dial number of 0A-J (a general-purpose number starting with “0”). With reference to FIG. 1, an example of processing when a terminal device 70A (70) connected to an IP network receives a call to a terminal device 70B (70) connected to a PSTN (public line network) will be described.

  For example, when the IP network accepts the transmission of the abbreviated incoming dial number #ABCD from the terminal device 70A, it transmits this #ABCD INVITE message to the AS 10. Then, the AS 10 converts the #ABCD INVITE message into an INVITE message with an incoming dial number of 0A-J. Then, the IP network sends the INVITE message of the incoming dial number 0A-J to the relay server 40, and the relay server 40 converts the INVITE message into an IAM message. This IAM message is transferred within the PSTN, and arrives at the terminal device 70B via the subscriber exchange 60 of the terminal device 70B (receiving terminal).

  That is, the AS 10 in the IP network converts this abbreviated incoming dial number into a 0A-J incoming dial number. As a result, the exchange in the PSTN only needs to perform incoming call processing (ordinary incoming call processing) using an incoming dial number of a general-purpose number, so even if the terminal device 70A of the IP network uses an abbreviated incoming dial number, The incoming call can be received at the terminal device 70B.

  Although not shown in the figure, when the PSTN subscriber exchange 60 of this incoming call system accepts a call using the abbreviated dialing number from the terminal device 70B, the subscriber exchange 60 has its own abbreviated dial DB (logic Referring to the ID information), the abbreviated incoming dial number is converted to 0A-J. Then, the relay server 40 converts the 0A-J IAM message into a 0A-J INVITE message and transmits it to the IP network. The INVITE message is transferred in the IP network and arrives at the terminal device 70A. In other words, the incoming call system can perform incoming processing of the shortened incoming dial number from the terminal device 70 connected to the IP network and incoming processing of the shortened incoming dial number from the terminal device 70 connected to the PSTN.

  Next, details of the incoming call system will be described with reference to FIG. As described above, the incoming call system includes the IP network and the PSTN, and the IP network and the PSTN are connected by the relay server 40. Also here, it is assumed that the terminal device 70A is connected to the IP network and the terminal device 70B is connected to the PSTN. In the following description, the abbreviated incoming dial number is described by a predetermined number + N-digit number. That is, it is assumed that the subscriber server 20 (described later) determines whether the incoming dialing number is a shortened incoming dialing number based on whether or not the predetermined number is included in the incoming dialing number. The terminal device 70 is a computer, a telephone, or the like. The number of servers, devices, and exchanges installed in this incoming call system is not limited to the numbers shown in FIGS.

  The IP network of this incoming call system includes an IP conversion device 30, a subscriber server 20, and an AS 10. The IP conversion device 30 is an adapter for using the terminal device 70 as a so-called IP telephone. The IP conversion device 30 is realized by a device having a communication interface with the terminal device 70 and a communication interface with the subscriber server 20. The IP conversion device 30 includes an IP conversion unit 31 that converts a transmission signal transmitted from the terminal device 70 into an INVITE message (a message used for call processing by SIP (Session Initiation Protocol)). The IP conversion device 30 transfers the INVITE message converted by the IP conversion unit 31 to the subscriber server 20. Further, when 180 Ringing is received from the subscriber server 20, a ringing tone of the terminal device 70 which is the transmission source is sounded. Then, when the destination terminal device 70 goes off-hook, communication is established so that a call can be made with the terminal device 70. Here, the IP conversion device 30 and the terminal device 70 are separate devices, but this may be realized by one device (computer or the like).

  The subscriber server 20 is a device that connects the IP conversion device 30 and the relay server 40, and is realized by a computer having an interface that can communicate over an IP network. The subscriber server 20 includes a connection processing unit 21, a number inquiry unit 22, and an IP conversion device DB (database) 23.

  The connection processing unit 21 transfers the INVITE message from the IP conversion device 30 to another subscriber server 20 (not shown) or the relay server 40, or sends a 180 Ringing response from the relay server 40 to the IP conversion device 30 or the relay server. Forward to 40.

  When the connection processing unit 21 receives the INVITE message of the shortened incoming dial number, the number inquiry unit 22 inquires the AS 10 about the incoming dial number (0A-J) indicated by the shortened incoming dial number. When the incoming dial number as the inquiry result is obtained from the AS 10, the incoming dial number is output to the connection processing unit 21. The connection processing unit 21 transmits the INVITE message of the incoming dial number (0A-J) output from the number inquiry unit 22 to the relay server 40. Whether or not the incoming dial number of the received INVITE message is an abbreviated incoming dial number, whether or not a predetermined number or symbol (for example, “#” or “*”) is included at the beginning of the number. It is judged by. If the incoming dial number of the INVITE message is not an abbreviated incoming dial number, the connection processing unit 21 does not make an inquiry to the AS 10 and performs normal incoming processing based on SIP.

  The IP conversion device DB 23 is a database showing address information of the IP conversion device 30 for connecting to the terminal device 70 of the incoming dial number for each incoming dial number. The IP conversion device DB 23 is referred to when the IP conversion device 30 that is the transfer destination of the INVITE message is specified when the INVITE message is received from the relay server 40 side.

  The AS 10 is a device that returns an incoming dial number corresponding to the abbreviated incoming dial number in response to an inquiry about the abbreviated incoming dial number from the subscriber server 20. The AS 10 is realized by a computer having an interface that can communicate with the IP network, and includes an abbreviated dial DB 11 and a number search unit 12.

  The abbreviated dial DB 11 is a database indicating the incoming dial number (0A-J) corresponding to the abbreviated incoming dial number for each abbreviated incoming dial number.

  When the number retrieval unit 12 receives an inquiry message (INVITE message of the incoming dial number) corresponding to the abbreviated incoming dial number from the subscriber server 20, the abbreviated incoming dial number is shortened using this abbreviated incoming dial number as a key. The dial DB 11 is searched to identify the incoming dial number indicated by the abbreviated incoming dial number. Then, the number search unit 12 returns an INVITE message of the specified incoming dial number to the subscriber server 20.

  The information in the abbreviated dial DB 11 is added or updated by a command from an external device of the IP network, for example.

  The relay server 40 is an apparatus for connecting the IP network and the PSTN to each other, and is realized by a computer having a communication interface with the subscriber server 20 and a communication interface with the PSTN relay switch 50. When the relay server 40 receives the INVITE message from the subscriber server 20, the relay server 40 converts the message into an IAM message that is a message used in the PSTN. The relay server 40 includes a connection processing unit 41 that transmits the converted IAM message to the relay switch 50 of the PSTN. The relay exchange 50 that is the destination of the IAM message uses the relay exchange DB (the relay exchange 50 for connecting to the terminal device 70 of the incoming dial for each incoming dial number for each incoming dial number using the incoming dial number included in the INVITE message as a key. Information (not shown) is searched and specified. Further, when receiving an IAM message from the PSTN side, the connection processing unit 41 converts the IAM message into an INVITE message. Then, the converted INVITE message is transmitted to the subscriber server 20 of the IP network. When the relay server 40 receives an IAM message from the PSTN, the relay switch 50 that is the destination of the IAM message sends the relay switch DB (for each incoming dial number using the incoming dial number included in the IAM message as a key). The information indicating the relay exchange 50 for connecting to the terminal device 70 of the incoming dial number (not shown) is searched and specified.

  Next, PSTN will be described. The PSTN includes a relay switch 50 and a subscriber switch 60. The relay switch 50 connects the subscriber switch 60 and the relay server 40. The relay switch 50 includes a switch DB 51 and a connection processing unit 52. The exchange DB 51 is information indicating the subscriber exchange 60 for connecting to the terminal device 70 of the incoming dial number for each incoming dial number. When the connection processing unit 52 receives the IAM message from the relay server 40, the connection processing unit 52 searches the subscriber switch 60 using the incoming dial number included in the IAM message as a key, and transmits the IAM message to the searched subscriber switch 60. To do. Further, when the connection processing unit 52 receives an IAM message from the subscriber exchange 60, the connection processing unit 52 transmits the IAM message to the relay server 40.

  The subscriber exchange 60 is an exchange connected to the terminal device 70 in the PSTN. The subscriber exchange 60 includes a connection processing unit 61 and an abbreviated dial DB 62. When the connection processing unit 61 receives an IAM message from the relay exchange 50, the connection processing unit 61 performs an incoming call process on the terminal device 70 of the incoming dial number included in the IAM message. Further, when the connection processing unit 61 accepts a transmission from the terminal device 70, the connection processing unit 61 converts the transmitted transmission signal into an IAM message and transmits it to the relay switch 50. The abbreviated dial DB 11 is a database showing an incoming dial number corresponding to the abbreviated incoming dial number for each abbreviated incoming dial number. When the subscriber exchange 60 accepts the transmission of the speed dial number from the terminal device 70, the subscriber switch 60 refers to the speed dial DB 11 to identify the call dial number corresponding to the speed dial number and specifies the call dial number. An IAM message is transmitted to the relay exchange 50.

  According to such an incoming call system, since the AS 10 in the IP network converts the abbreviated incoming dial number to the incoming dial number, when the transmission of the abbreviated incoming dial number from the terminal device 70 on the IP network side is accepted However, the incoming process to the PSTN terminal device 70 can be performed.

  Next, the processing procedure of such a receiving system will be described with reference to FIGS. First, referring to FIG. 3, the transmission of the abbreviated dialing number “#ABCD” from the terminal device 70 (70A) connected to the IP network of FIG. 2 is received by the terminal device 70 (70B) connected to the PSTN. The case where it makes it explain is demonstrated to an example.

  First, when detecting that the terminal device 70A is off-hook, the IP conversion device 30 outputs DT (dial tone) to the terminal device 70A (S1). When the IP converter 31 of the IP converter 30 receives #ABCD dialing (outgoing) (S2), it generates an INVITE message (#ABCD) of this incoming dialing number (#ABCD), and the subscriber server 20 (S3). When the connection processing unit 21 of the subscriber server 20 determines that the incoming dialing number included in the received INVITE message includes a predetermined number or symbol indicating the shortened incoming dialing number, the number inquiry unit 22 causes the shortening to be performed. An incoming dial number INVITE message (#ABCD) is transmitted to the AS 10 (S4), and an inquiry about the incoming dial number of the general-purpose number corresponding to the abbreviated incoming dial number (#ABCD) is made.

  When the AS 10 receives this INVITE message (#ABCD), the number search unit 12 searches the abbreviated dial DB 11 to receive a general-purpose incoming dial number (0A-J) corresponding to the abbreviated incoming dial number (#ABCD). And the number is converted to the retrieved dialed number (S5). That is, the number search unit 12 of the AS 10 converts the INVITE message (#ABCD) into an INVITE message (0A-J). The converted INVITE message (0A-J) is returned to the subscriber server 20 (S6), and the connection processing unit 21 of the subscriber server 20 sends the INVITE message (0A-J) returned from the AS 10 to the relay server. 40 (S7).

  The relay server 40 that has received this INVITE message (0A-J) converts this INVITE message (0A-J) into an IAM message (0A-J) used in the PSTN, and transmits it to the relay switch 50 (S8). The connection processing unit 52 of the relay exchange 50 searches the exchange DB 51 using the incoming dial number (0A-J) included in the IAM message as a key, and specifies the subscriber exchange 60 to which the IAM message is transferred. Then, the connection processing unit 52 of the relay switch 50 transfers the IAM message (0A-J) to the specified subscriber switch 60 (S9). The connection processing unit 61 of the subscriber exchange 60 that has received this IAM message performs incoming processing of the incoming dial number included in the IAM message to the terminal device 70B (S10). In response to this, the subscriber exchange 60 transmits an ACM message (message indicating that the destination is called by PSTN) to the relay exchange 50 (S11), and the relay exchange 50 transmits the ACM message to the relay server. 40 (S12). Thereafter, the relay server 40 transmits a 180 message (180 Ringing, a message notifying that the called party is being called by SIP) to the subscriber server 20 (S13). → Transferred with IP conversion device 30 (S14, S15, S16), and IP conversion device 30 outputs a ringing tone to terminal device 70A (S17: RBT). For example, a sound indicating that the terminal device 70B is being called is output to the terminal device 70A.

  Thereafter, when the subscriber exchange 60 of the terminal device 70B detects the off-hook of the terminal device 70B (S20), the subscriber exchange 60 sends an ANM message (message indicating that it has been off-hooked at the destination) to the relay exchange 50. The relay switch 50 transmits this ANM message to the relay server 40 (S22). Thereafter, the relay server 40 transmits a 200 message (200 OK) to the subscriber server 20 (S23), and the 200 message is transferred as AS10 → subscriber server 20 → IP converter 30 (S24, S25). , S26). The terminal devices 70A and 70B are in a state where communication is possible (a state during communication). After S26, the IP conversion device 30 returns an ACK to the subscriber server 20 (S27), and this ACK is transferred as AS10 → subscriber server 20 → relay server 40 (S28, S29, S30). Thereafter, when the call is finished, the incoming call system performs a communication disconnection process.

  Note that when the terminal device 70 (70B) connected to the PSTN in FIG. 2 receives the call of the short incoming dial number “#ABCD” from the terminal device 70 (70B) connected to the IP network, Processing as shown in FIG.

  First, when the subscriber exchange 60 detects that the terminal device 70B is on-hooked, it outputs DT (dial tone) to the terminal device 70B (S41). When the connection processing unit 61 of the subscriber exchange 60 accepts #ABCD dialing (outgoing), the incoming dialing number (0A-J) corresponding to the abbreviated incoming dialing number (#ABCD) is obtained from the abbreviated dialing DB 62. A search is performed, and number conversion to the retrieved incoming dial number is performed (S43). Then, an IAM message (0A-J) of the converted incoming dial number (0A-J) is created and transmitted to the relay switch 50 (S44), and the connection processing unit 52 of the relay switch 50 transmits the IAM message (0A-J). -J) is transmitted to the relay server 40 (S45).

  The connection processing unit 41 of the relay server 40 converts the IAM message (0A-J) from the relay switch 50 into an INVITE message (0A-J), and converts the INVITE message (0A-J) to the incoming dial number “0A-J”. J "is transmitted to the subscriber server 20 connected to the terminal device 70A (S46). The connection processing unit 21 of the subscriber server 20 searches for the IP conversion device 30 in the IP conversion device DB 23 using the incoming dial number (0A-J) as a key, and sends an INVITE message (0A-J) to the searched IP conversion device 30. ) Is transmitted (S47). Then, the IP conversion device 30 that has received this INVITE message (0A-J) performs incoming processing to the terminal device 70A (S48). Thereafter, the IP conversion device 30 transmits a 180 message to the subscriber server 20 (S49), and the subscriber server 20 transmits the 180 message to the relay server 40 (S50). In response, the relay server 40 outputs a ringing tone to the terminal device 70B via the relay switch 50 and the subscriber switch 60 (S51: RBT). For example, a sound indicating that the terminal device 70A is being called is output to the terminal device 70B.

  Thereafter, when the IP conversion device 30 of the terminal device 70A detects an off-hook of the terminal device 70A (S60), the IP conversion device 30 transmits a 200 message to the subscriber server 20 (S61), and the subscriber server 20 The 200 message is transmitted to the relay server 40 (S62). The relay server 40 transmits an ANM message to the relay switch 50 (S63), and the relay switch 50 transmits this ANM message to the subscriber switch 60 (S64). The terminal devices 70A and 70B are in a state where communication is possible (a state during communication). The relay server 40 returns ACK to the subscriber server 20 after S62 (S65), and the subscriber server 20 transmits this ACK to the IP conversion device 30 (S66). Thereafter, when the call is finished, the incoming call system performs a communication disconnection process.

  In this way, the incoming call system uses this abbreviated incoming dial number regardless of whether (1) the transmission of the abbreviated incoming dial number is accepted via the IP network or (2) the outgoing abbreviated dialing number is accepted via the PSTN. The incoming call processing of the corresponding incoming dial number to the terminal device 70 can be performed.

  In the above-described embodiment, as shown in FIG. 5, the incoming call system causes a call from the terminal device 70C connected to the IP network to be received by the terminal device 70D connected to the IP network. Good. In this case, when the subscriber server 20A receives the INVITE message of the shortened incoming dial number from the terminal device 70C via the IP conversion device 30A, the shortened incoming dial number (for example, “#” ABCD ") INVITE message is converted into an incoming dial number INVITE message with a general-purpose number (0A-J). Then, the subscriber server 20A transmits this INVITE message to the relay server 40. The relay server 40 specifies the subscriber server 20B for reaching the terminal device 70B that is the destination from the incoming dial number included in the INVITE message, and transmits the INVITE message to this subscriber server 20B. Then, the subscriber server 20B transmits this INVITE message to the IP conversion device 30B connected to the destination terminal device 70B, and the IP conversion device 30B performs incoming processing to the terminal device 70D. By doing in this way, the receiving system can make a call from the terminal device 70C connected to the IP network to the terminal device 70D connected to the IP network.

  In the above-described embodiment, the case where the incoming call system performs the conversion process of the nationwide abbreviated incoming dialing number (nationally available abbreviated incoming dialing number) has been described as an example, but the present invention is not limited to this. For example, the incoming call system may perform a conversion process for a regional unit abbreviated incoming dial number (a regional unit-use type abbreviated incoming dial number). In this case, as shown in Table 1 below, the abbreviated dial DB 11 of the AS 10 shortens the incoming call by using the number as the source for each number (area code, etc.) of the first predetermined digit portion of the source dial number. When the dial number transmission is accepted, the incoming dial number to be converted is indicated.

  For example, the number search unit 12 of the AS 10 receives an INVITE message with a dial number starting with “0422” (“0422-**-****”) and an incoming call destination “#ABCD”. When this is done, the incoming dial number “YYYY” is specified with reference to this speed dial DB 11. Then, an INVITE message in which the incoming dial number of this INVITE message is converted to “YYYY” is created and returned to the subscriber server 20. In this way, the incoming call system can convert the incoming dial number even for the area-based shortened incoming dial number.

Moreover, although the incoming call system has been described as including one AS 10, it may include a plurality of AS 10. In this case, the information in the abbreviated dial DB 11 of each AS 10 may be the same, or when using the above-mentioned area-use type abbreviated incoming dial number, a different abbreviated dial DB 11 may be provided for each AS 10 in that area. . In this case, the subscriber server 20 that has received the INVITE message of the shortened incoming dial number determines which AS 10 should be inquired about the shortened incoming dial number based on the source dial number of the INVITE message. Shall.
Alternatively, the AS 10 may be divided for each #ABCD number band on the receiving side as the one provided to the speed dial DB 11 of another AS 10. For example, # 1000 series is stored in the abbreviated dial DB 11 of the AS 10A, # 2000 series is stored in the abbreviated dial DB 11 of the AS 10B, and the subscriber server 20 that has received the INVITE message of the abbreviated incoming dial number receives the abbreviated incoming of this INVITE message. Based on the dial number, it is determined which AS 10 should be inquired about the abbreviated incoming dial number.

  Further, the subscriber server 20 itself of FIG. 2 may be provided with the speed dial DB 11 and the AS 10 may not be provided in the incoming call system. In this case, as shown in FIG. 6, the number inquiry unit 22 of the subscriber server 20 </ b> A refers to the speed dial DB 11 to convert the speed dial number to the general dial number.

  The AS 10, the subscriber server 20 (20A), and the relay server 40 described above are realized by a computer having a CPU (Central Processing Unit), an input / output interface, a communication interface, and storage means. The functions of these servers may be realized by program execution processing by the CPU, or may be realized by dedicated hardware.

  Further, in the above-described embodiment, the case where the logical ID is an abbreviated incoming dial number including # or the like has been described as an example. However, even if the identification information is another character, symbol, number, or a combination thereof, Good.

10 AS (Application Server)
11, 62 Speed dial (logical ID) DB (database)
12 Number Search Unit 20 (20A) Subscriber Server 21 Connection Processing Unit 22 Number Inquiry Unit 23 IP Conversion Device DB
DESCRIPTION OF SYMBOLS 30 IP converter 31 IP converter 40 Relay server 41 Connection processing part 50 Relay switch 51 Switch DB
52 Connection Processing Unit 60 Subscriber Switch 61 Connection Processing Unit 70 (70A, 70B) Terminal Device

Claims (6)

In an IP (Internet Protocol) network, a subscriber server that receives an INVITE message of a destination dial number from a source terminal device, and an INVITE message of the destination dial number from the subscriber server, A subscriber server in a receiving system including a relay server that transfers the INVITE message to a subscriber server in an IP network or a relay switch in the public line network and performs a connection process with a terminal device of a destination; ,
A number inquiry unit that inquires a number search unit for a destination dial number indicated by the logical ID when receiving an INVITE message having identification information indicating the logical ID of the incoming dial number;
When receiving the INVITE message of the destination dial number indicated by the logical ID from the number inquiry means, for each logical ID, refer to the logical ID information indicating the destination dial number indicated by the logical ID, and Number search means for searching for the called dial number indicated by the logical ID of the INVITE message and returning the INVITE message of the searched incoming dial number to the number inquiry means;
A subscriber server comprising: connection processing means for transmitting the INVITE message to the relay server when an INVITE message of the destination dial number is received from the number search means. The logical ID information is:
For each area to which the dial number of the terminal device of the transmission source belongs, the information is information indicating the logical ID used in the area to which the dial number belongs and the destination dial number indicated by the logical ID. The subscriber server according to claim 1. In the IP network, a subscriber server that receives an INVITE message of a destination dial number from a source terminal device, and an INVITE message of the destination dial number from the subscriber server, A call receiving system including a relay server that transfers the INVITE message to a subscriber server or a relay switch of the public line network and performs a connection process with a terminal device of a call destination;
For each logical ID, refer to the logical ID information when a logical ID information indicating the destination dial number indicated by the logical ID is stored, and when the INVITE message of the logical ID is received from the subscriber server. And an application server comprising a number search means for searching for the called dial number indicated by the logical ID of the INVITE message and returning it to the subscriber server;
When an INVITE message having a logical ID having identification information indicating that the logical ID is received, a number inquiry means for inquiring the destination dial number indicated by the logical ID to the application server; The subscriber server comprising: connection processing means for transmitting the INVITE message of the destination dial number to the relay server when the INVITE message of the destination dial number indicated by the ID is received;
An incoming call system comprising the relay server.   4. The incoming call system according to claim 3, wherein the incoming call system includes a plurality of the application servers, and each of the storage units of the plurality of application servers stores the same logical ID information.   The logical ID information is information indicating the logical ID used in the area to which the dial number belongs and the destination dial number indicated by the logical ID for each area to which the dial number of the terminal device of the transmission source belongs. 5. The incoming call system according to claim 3, wherein the incoming call system is provided. In an IP (Internet Protocol) network, a subscriber server that receives an INVITE message of a destination dial number from a source terminal device, and an INVITE message of the destination dial number from the subscriber server, The subscriber server in the receiving system including the relay server that forwards the INVITE message to a subscriber server in an IP network or a relay switch of the public line network and performs incoming processing to a terminal device of a destination,
Receiving an INVITE message of a logical ID having identification information indicating the logical ID;
For each logical ID, referring to logical ID information indicating a destination dial number indicated by the logical ID, searching for a destination dial number indicated by the logical ID of the INVITE message;
And a step of transmitting an INVITE message of the destination dial number to the relay server.

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