JP4309832B2 - VoIP service system, call control server, and call control method - Google Patents

Description

  The present invention relates to a voice communication technology using an IP (Internet Protocol) network, and more particularly to a call control technology for regulating outgoing calls from a terminal in a voice communication service (VoIP service: Voice over Internet Protocol).

The VoIP service, which is voice communication over an IP network, has attracted much attention because it is cheaper than a conventional PSTN (Public Switched Telephone Network) in both system construction and operation.
In voice communication on an IP network, a method is used in which voice data is divided into voice packets made up of small-capacity digital data on the transmitting side and transmitted, and decoded on the receiving side. As a result, voice and data can coexist without being distinguished and can be transmitted and received on the same IP network.

Such a VoIP service system is a VoIP service system for services provided by a conventional PBX system in accordance with a transition from a private branch exchange (PBX) system using a conventional PSTN to a VoIP service system. The realization of is being studied.
One such service is a voice VPN service using a VPN (Virtual Private Network). This type of voice VPN service is built on a sharable IP network by virtually constructing a network dedicated to users and connecting PBX systems at each branch office / branch located at different locations to integrate the extensions. This is a service that realizes an extension transmission function between terminals.

  When such a voice VPN service is provided by a VoIP service system, regarding outgoing calls to each terminal, other voice VPNs provided in parallel by the same VoIP service system, other VoIP service systems, and further PSTN Thus, whether or not it is possible to make and receive calls is determined by whether or not these network systems are physically connected, that is, whether or not a gateway or the like is provided for connection between networks. Incoming and outgoing calls restrictions were applied.

The applicant has not yet found prior art documents related to the present invention by the time of filing other than the prior art documents specified by the prior art document information described in this specification.
JP 2003-152890 A JP 2003-283653 A JP 2003-018182 A

However, in the conventional VoIP service system, although outgoing / incoming restrictions between network systems are realized in a fixed form, individual outgoing restrictions for individual terminals are provided on the network side instead of the PBX system. The call control server is not implemented and cannot be provided as one function of the voice VPN service.
The present invention is to solve such problems, and to provide a VoIP service system, a call control server, and a call control method capable of providing a call restriction function for individual terminals with the voice VPN service of the VoIP service system. It is an object.

In order to achieve such an object, the VoIP service system according to the present invention performs call control by accommodating each terminal in a call control server for a plurality of terminals that transmit and receive voice packets via an IP network. The VoIP service system that realizes voice communication with a terminal using an IP network, the basic contract ID table for managing the contents of the call restriction for each terminal accommodated in the call control server, and the basic contract In the ID table, information on no restriction, restriction on other than the base, restriction on other than the VPN group, restriction on specific number bands, and the contents of the transmission restriction on an arbitrary terminal obtained from the basic contract ID table are held as the outgoing restriction information. Call restriction determination means for determining whether or not a call can be made to a predetermined destination telephone number based on the After confirming the call restriction judgment means that the caller terminal can make a call to the callee telephone number specified in the call request, voice communication is established between the caller terminal and the callee terminal corresponding to the callee telephone number. Call control means for starting the call control for.

  At this time, the call control server is further provided with an extension / external line conversion table for managing the extension number of each terminal in association with the external line number of the terminal, and is designated as the destination telephone number in the call request by the call control means. The incoming side outside line number corresponding to the extension number may be acquired from the extension / outside line conversion table, and the outgoing call restriction determination means may confirm whether the outgoing side terminal can make a call to the incoming side outside line number.

Further, when the call control means performs call control, if the called terminal is accommodated in another call control server, a connection request instructing a call from the calling terminal to the called terminal is sent from the basic contract ID table. Adds the contents of the call restriction regarding the acquired arbitrary terminal , sends it to the called call control server in which the called terminal is accommodated, and adds it to the connection request in response to a connection request from another call control server Based on the outgoing call restriction determination information, it may be determined whether or not a call can be made to the called terminal regarding the calling terminal instructed by the connection request.

The call control server according to the present invention realizes voice communication at a terminal using the IP network by accommodating a plurality of terminals that transmit and receive voice packets via the IP network and performing call control. A call control server of a VoIP service system that manages the content of outgoing call restrictions for each accommodated terminal, and the basic contract ID table has no restriction as outgoing call restriction information, other than the base Information on regulations, regulations other than the VPN group, regulations on specific number bands, etc. are retained, and whether or not a call can be made to a predetermined destination telephone number is determined on the basis of the contents of the transmission regulations regarding an arbitrary terminal acquired from the basic contract ID table In response to a call origination request from the terminal and the call restriction judgment means, the call from the calling terminal is permitted for the destination telephone number specified in the call request. After confirming by Shin regulation determination unit, in which and a call control means for starting a call control for voice communication established between the called terminal corresponding to the destination telephone number and the calling terminal.

  At this time, an extension / external line conversion table for managing the extension number of each terminal in association with the external line number of the terminal is further provided, and the call control means corresponds to the extension number designated as the destination telephone number in the call request. The called side outside line number may be acquired from the extension / outside line conversion table, and the call restriction judgment means may confirm whether the call is possible from the calling side terminal for the called side outside line number.

Further, when the call control means performs call control, if the called terminal is accommodated in another call control server, a connection request instructing a call from the calling terminal to the called terminal is sent from the basic contract ID table. Adds the contents of the call restriction regarding the acquired arbitrary terminal , sends it to the called call control server in which the called terminal is accommodated, and adds it to the connection request in response to a connection request from another call control server Based on the outgoing call restriction determination information, it may be determined whether or not a call can be made to the called terminal regarding the calling terminal instructed by the connection request.

Further, the call control method according to the present invention is a terminal using an IP network by accommodating a terminal in a call control server and performing call control for a plurality of terminals that transmit and receive voice packets via the IP network. to achieve voice communication, a call control method for VoIP service system, the call control server, and the transmission regulation management step of managing the content of the call restriction for each terminal that is housed in the contract ID table, the basic In the contract ID table, as the transmission restriction information, a step in which information regarding no restriction, restriction other than the base, restriction other than the VPN group, specific number band restriction, and information acquired from the basic contract ID table by the call control server is stored. A call restriction determination step for determining whether or not a call can be made to a predetermined destination telephone number based on the contents of the call restriction on the terminal of In response to a call origination request from the terminal, the call origination terminal and the destination telephone are confirmed in the outgoing call regulation determination step after confirming that the call from the calling side terminal can be made to the destination telephone number specified in the call origination request. And a call control step for starting call control for establishing voice communication with the called terminal corresponding to the number.

  At this time, the call control server further includes an extension / external line conversion management step for associating the extension number of each terminal with the external line number of the terminal and managing the extension number / external line conversion table. The callee outside line number corresponding to the extension number designated as the destination telephone number is obtained from the extension / outline conversion table, and the call origination judgment step confirms whether the callee terminal can make a call to the callee outside line number. May be.

Further, in the call control step, if the called terminal is accommodated in another call control server at the time of call control, a connection request for instructing a call from the calling terminal to the called terminal is sent from the basic contract ID table. The step of adding the content of the transmission restriction regarding the acquired arbitrary terminal and transmitting to the called side call control server in which the called side terminal is accommodated, and the connection request according to the connection request from the other call control server And a step of determining whether or not to make a call to the called terminal regarding the calling terminal instructed by the connection request based on the outgoing call regulation determination information added to the connection request.

  According to the present invention, the contents of the call restriction regarding each terminal to be accommodated are managed in the basic contract ID table of the call control server, and based on the contents of the call restriction regarding any terminal acquired from the basic contract ID table. In response to a call request from the terminal by the call control means, the caller for the call destination telephone number specified in the call request is provided. After confirming the availability of outgoing calls from the terminal using the outgoing call restriction determination means, call control for establishing voice communication between the calling terminal and the called terminal corresponding to the destination telephone number is started. Individual transmission restrictions can be applied to each terminal accommodated in the control server.

Therefore, in the voice VPN service of the VoIP service system, it is possible to provide a call restriction function for individual terminals.
Moreover, instead of the conventional outgoing / incoming restrictions between network systems that are fixedly determined by the presence or absence of physical facilities for connection between networks, for example, according to a request from a user, a basic contract ID table The content of the outgoing call restriction service can be flexibly changed with respect to an arbitrary terminal by an extremely simple operation of changing the outgoing call restriction content.

Next, embodiments of the present invention will be described with reference to the drawings.
[First Embodiment]
First, a VoIP service system according to a first embodiment of the present invention will be described with reference to FIG. FIG. 1 is a block diagram showing the configuration of the VoIP service system according to the first embodiment of the present invention.
In this VoIP service system, a call control server 10, an IP network 20, terminals 31 to 33, and a voice guidance server (IVR: Intractive Voice Response) 50 are provided.

In FIG. 1, each of the terminals 31 to 33 is connected to an IP network 20 including an IP-VPN network via an access line such as a wide area LAN (Local Area Network) line. VoIP voice communication and data communication are performed by exchanging packets.
A call control server 10 is connected to the IP network 20, and call control of these terminals 31 to 33 is performed by exchanging call control packets with the terminals 31 to 33.

In addition, a voice guidance server 50 is connected to the IP network 20, and when an error occurs due to call restriction during call control, voice guidance is transmitted to the calling terminal by VoIP voice communication.
Further, a VoIP gateway that connects another VoIP service system and the VoIP service system, a PSTN gateway that connects PSTN and the VoIP service system, and the like are connected to the IP network 20 as necessary (not shown). )

Further, each terminal 31 to 33 is connected to each terminal 31 in the voice VPN group, further in the global telephone network to which each terminal 31 to 33 belongs, for example, the entire IP telephone network or the entire telephone network including the PSTN. An external line number is assigned as a telephone number for identifying .about.33.
In the example shown in FIG. 1, an external line number “05033350002” is assigned to the terminal 31, and an external line number “05034506001” is assigned to the terminal 32. The terminal 33 is assigned with an external line number “05050360002”.

  In the present embodiment, the call control server 10 manages transmission restriction information regarding each terminal accommodated in the call control server 10, and in response to a transmission request from these terminals, transmission restriction information regarding the calling terminal. , It is determined whether or not a call can be made to the called terminal corresponding to the destination telephone number specified in the call request.

[Call control server]
Next, the call control server 10 used in the VoIP service system according to the first embodiment of the present invention will be described in detail with reference to FIG. FIG. 2 is a block diagram showing a configuration example of a call control server used in the VoIP service system according to the first embodiment of the present invention.
The call control server 10 includes a server device having a computer as a whole, and includes a communication interface unit (hereinafter referred to as a communication I / F unit) 11, a screen display unit 12, an operation input unit 13, a storage unit 14, and a control unit 15. Is provided.

The communication I / F unit 11 is a circuit unit that is connected to the IP network 20 and transmits and receives various packets such as control packets necessary for call control of the terminals 31 to 33.
The screen display unit 12 includes a screen display device such as an LCD or a CRT, and displays various information on the screen based on instructions from the control unit 15.
The operation input unit 13 includes an operation input device such as a keyboard and a mouse, detects an operator operation, and outputs the operation to the control unit 15.

The storage unit 14 includes a storage device such as a hard disk or a memory, and is used for various processes in the control unit 15, for example, an extension / external line conversion table 14A, an external line / extension conversion table 14B, a basic contract ID table 14C, and a specific number restriction table 14D. Various management information such as the routing information table 14E and the program 14P are stored.
The management information is registered in the storage unit 14 in advance using the image display unit 12 and the operation input unit 13 or via the communication I / F unit 11. The program 14 </ b> P is a program for realizing various processes in the control unit 15, and is fetched in advance via the recording medium or the communication I / F unit 11 and stored in the storage unit 14.

The control unit 15 includes a microprocessor such as a CPU and its peripheral circuits, and is a functional unit that implements various functional units by reading the program 14P from the storage unit 14 and executing it.
As this functional means, there are a call control means 15A and a transmission restriction determination means 15B.
Among these, the call control means 15A is a means for performing various call controls based on requests from terminals under management. The outgoing call restriction determination means 15B is a means for referring to the basic contract ID table 14C and further the specific number restriction table 14D of the storage unit 14 to determine whether or not outgoing calls relating to terminals under management are permitted.

[Extension / Outline conversion table]
Next, the extension / outline conversion table 14A used in the VoIP service system of FIG. 1 will be described in detail with reference to FIG. FIG. 3 is a configuration example of the extension / outside line conversion table of the call control server 10.
This extension / external line conversion table 14A is a table for managing, for each extension number unique to each terminal in the VoIP service system, the voice VPN group number to which the terminal belongs and the external line number of the terminal.

  In FIG. 3, for example, the terminal 31 having the extension number “33330” belongs to the voice VPN group having the group number “1”, and the outside line number is “05033335002”.

When the destination telephone number included in the call request from the terminal is an extension number, the call control server 10 refers to the extension / outside line conversion table 14A to obtain the outside line number of the called terminal and The extension is connected in the same way as the outgoing call processing.
Further, the call control server 10 refers to the basic contract ID table 14C and further to the specific number restriction table 14D based on the contract ID of the terminal acquired from the extension / external line conversion table 14A, and determines whether or not the call can be made regarding the terminal under management. Determine.

[External / Internal conversion table]
Next, the external / internal conversion table 14B used in the VoIP service system of FIG. 1 will be described in detail with reference to FIG. FIG. 4 shows an example of the configuration of the external line / extension conversion table of the call control server 10.
This external line / extension conversion table 14B includes, for each external line number unique to each terminal managed by the call control server 10, the extension number of the terminal, the voice VPN group number to which the terminal belongs, the base number of the terminal, And a table for managing the IP addresses of the terminals.

In FIG. 4, for example, the terminal 31 having the extension number “05033333002” under the management of the call control server 10 has the extension number “33330” and belongs to the voice VPN group with the group number “1”. It can be seen that the number is “33” and the IP address is “ab.0.1”.
The call control server 10 searches the external line / extension conversion table 14B for an external line number that matches the destination telephone number notified in the connection request from the other call control server, and The IP address of the called terminal is confirmed, and a connection request is transmitted to the called terminal using the IP address.

[Basic contract ID table]
Next, the basic contract ID table 14C used in the VoIP service system of FIG. 1 will be described in detail with reference to FIG. FIG. 5 is a configuration example of a basic contract ID table possessed by the call control server 10.
The basic contract ID table 14C is a table for managing the external line number of the terminal and the transmission restriction information indicating the content of the transmission restriction related to the terminal for each contract ID of each terminal under the management of the call control server 10. It is.

For example, there are no restrictions, restrictions other than the base (can be sent only to terminals in the base), restrictions other than the voice VPN group (can be sent only to terminals in the voice VPN group), specific number Various kinds of transmission restriction contents such as band restriction (cannot be sent only to a terminal of a specific number band) can be provided.
In the basic contract ID table 14C, the contents of these transmission restrictions are managed by transmission restriction information consisting of numbers. For example, “0” is assigned if there is no restriction, “1” is assigned for a restriction other than the base, “2” is assigned for a restriction other than the voice VPN group, and “3” is assigned for a specific number band restriction.

  In FIG. 5, the contract ID “5000000001” is assigned with the external line number “05033333502” and the outgoing call restriction information “2” is set. The outgoing regulations are applied. In addition, the contract ID “5000000002” is assigned with the external line number “050503600001” and is set with the outgoing call restriction information “1”, and the outgoing call restriction for prohibiting outgoing calls to the terminal 32 other than the same base. Applies. In addition, the contract ID “50000000011” is assigned with the external line number “050503600002” and the transmission restriction information “3” is set, and the detailed contents of the specific number restriction table 14D are set for the terminal 33. Based on this, the outgoing call restriction is applied to make the outgoing call only in a specific number band. In addition, about the content of transmission control, it is not limited to the said example, The content of control can be set arbitrarily as needed.

In response to a call request from a terminal, the call control server 10 confirms the content of the call restriction for the contract ID of the calling terminal with the basic contract ID table 14C, and is specified by the destination telephone number specified in the call request. The necessity of outgoing call restriction for the terminal is determined.
At this time, if the destination telephone number is an extension number, the extension number of the called terminal is obtained by referring to the extension / outside line conversion table 14A, and it is determined whether or not the call restriction for the terminal specified by the extension number is necessary. To do.

[Specific number restriction table]
Next, the specific number restriction table 14D used in the VoIP service system of FIG. 1 will be described in detail with reference to FIG. FIG. 6 is a configuration example of the specific number restriction table possessed by the call control server 10.
The specific number restriction table 14 </ b> D is a table that manages a specific number that is subject to call restriction for each contract ID of each terminal under the management of the call control server 10.

In FIG. 6, for example, a specific number 1 “05033333991”, a specific number 2 “03”, and the like are set for the contract ID “50000000011”, and the transmission failure to each specific number is applied under the logical sum condition. Each specific number is forward-matched and compared with the outside line number of the called party. For example, according to the specific number 2, all the outside line numbers starting with “03” are set to be unsuccessful.
When the specific number band restriction is set in the basic contract ID table 14C for the contract ID of the calling terminal, the call control server 10 acquires the specific number of the contract ID from the specific number restriction table 14D, respectively. Then, it is compared with the called outside line number to determine whether the call can be made. In the example of FIG. 6, it is determined that transmission is not possible for all the external numbers having “05033333991” or “03” from the top.

[Routing Information Table]
Next, the routing information table 14E used in the VoIP service system of FIG. 1 will be described in detail with reference to FIG. FIG. 7 is a configuration example of a routing information table possessed by the call control server 10.
The routing information table 14E includes a management device that manages a terminal to which the external line number is assigned, for example, a call control server, a VoIP gateway, or a PSTN gateway, for each external line number of a terminal accessible from the VoIP service system. This is a table for managing the IP address of the management device and the system information for confirming the network system to which the management device belongs.

In FIG. 7, for example, each terminal having the external line numbers “050-3300-xxxx” to “050-3399-xxxx” is managed by the management apparatus of the IP address “ab.10.1” in this case, the call control server 10. It can be seen that the management apparatus belongs to the VoIP service system “A”.
In addition, each terminal having the external line numbers “050-3400-xxxx” to “050-3450-xxxx” is managed by the management apparatus having the IP address “ab.10.2”. It can be seen that it belongs to another VoIP service system “B”.

The call control server 10 searches the routing information table 14E for an external line number that matches the destination telephone number notified by the call origination request from the terminal, and the management apparatus specified by the management apparatus IP address of the external line number In response to this, a connection request for the call origination request is transmitted according to a known VoIP call control protocol such as SIP (Session Initiation Protocol).
At this time, when the called side management device indicates the own device, the IP address of the called side terminal is acquired from the external line / extension conversion table 14B, and a connection request is transmitted to the called side terminal.

[Operation of First Embodiment]
Next, with reference to FIG. 8, the outgoing / incoming call processing operation of the VoIP service system according to the first embodiment of the present invention will be described. FIG. 8 is a sequence diagram showing an outgoing call processing operation of the VoIP service system according to the first embodiment of the present invention.
Here, in the VoIP service system of FIG. 1 described above, a case where transmission is made from the terminal 31 at the base 40 to the terminal 33 at the base 41 in the same voice VPN group will be described as an example.

In response to a user's call operation, the terminal 31 uses the IP network 21 to send a call request with the destination telephone number designated by the operation as the destination information and the external line number of the terminal 31 as the source information. To the call control server 10 (step 100).
The control unit 15 of the call control server 10 receives the transmission request from the terminal 31 via the communication I / F unit 11, and analyzes the transmission request by the call control unit 15A.

  Here, if the destination telephone number is an extension number instead of an extension number such as “0ABJ”, “050”, “090”, the extension number is searched from the extension / external line conversion table 14A of the storage unit 14 to cope with it. The outside line number to be acquired is acquired as the called side outside line number of the terminal 33 (step 101). If the destination telephone number is an outside line number, the destination telephone number is acquired as the called side outside line number (step 101).

Subsequently, the control unit 15 refers to the basic contract ID table 14C in the storage unit 14 by the transmission restriction determination unit 15B, acquires the transmission restriction information related to the contract ID corresponding to the external line number of the calling terminal 31, and the terminal It is determined whether or not there is a call restriction for 31 (step 102).
Here, when the outgoing call restriction for the terminal 31 is not set (step 102: NO), the process proceeds to a calling process from step 110 described later.

On the other hand, when the transmission restriction for the terminal 31 is set (step 102: YES), the content of the transmission restriction is confirmed based on the transmission restriction information (step 103), and it is determined whether or not transmission to the called outside line number is possible (step). 104).
In this outgoing call restriction determination, when base information and voice VPN group information regarding the calling terminal and the called terminal are required, the outgoing call restriction determination means 15B acquires from the external line / extension conversion table 14B of the storage unit 14 and both terminals It is determined whether or not they are in the same location or in the same voice VPN group. If the specific number band restriction is set, the specific number restriction table 14D of the storage unit 14 is referred to, and the outside line number of the called terminal is compared with each specific number of the calling terminal to determine whether or not the call can be made. To do.

  In step 104, if it is determined that the called outside line number is subject to outgoing restriction and cannot be sent (step 104: NO), the call control means 15A causes an error from the communication I / F unit 11 to the voice guidance server 50. (Step 105). In response to this, the voice guidance server 50 notifies the terminal 31 that the call cannot be made by voice guidance (step 106), and the series of call processing ends.

  On the other hand, if it is determined in step 104 that the called outside line number is not subject to outgoing call restriction and that outgoing calls are possible (step 104: YES), the call control means 15A shifts to the outgoing call processing from step 110.

In this calling process, first, the IP address of the management apparatus corresponding to the called outside line number is acquired from the routing information management table 14E of the storage unit 14 (step 110), and the IP address indicates a management apparatus other than the own apparatus. In this case (step 111: NO), it is determined that the called terminal is not managed by the own apparatus but is managed by another managing apparatus, and based on the IP address, the outside line number of the calling terminal is used as the source information. A connection request with the destination outside line number as the destination information is transmitted from the communication I / F unit 11 to the management apparatus (step 112).
Thereafter, a response from the management apparatus is notified to the calling terminal 31 via the call control server 10 and an RTP (Real-time Transport Protocol) session is established between the terminal 31 and the terminal 33 via the IP network 20. VoIP voice communication is started.

  In step 111, if the IP address of the management device points to its own device (step 111: YES), the IP address of the terminal 33 is acquired from the external line / extension conversion table 14B of the storage unit 14 based on the incoming side external line number ( Step 120). Then, based on the IP address, a connection request using the external line number of the terminal 31 as the source information and the external line number of the terminal 33 as the destination information is sent from the communication I / F unit 11 to the terminal 33 via the IP network 20. Transmit (step 121).

In response to a connection request from the call control server 10, the terminal 33 notifies the user of the incoming call by sending a ringtone from a speaker or displaying an incoming call using an LED or LCD (step 122). A response is notified to the call control server 10 in response to a response operation by the person (step 123). The response from the terminal 33 is notified to the caller terminal 31 through the call control server 10 (step 124).
As a result, an RTP session is established between the terminal 31 and the terminal 33 via the IP network 20, VoIP voice communication is started (step 125), and a series of outgoing call processing operations in the VoIP service system ends.

  Therefore, when there is a transmission request from the terminal 31 to the terminal 33, the call control server 10 refers to the basic contract ID table 14 </ b> C and confirms the content of transmission restriction of the terminal 31. In this case, since restrictions other than the same group are set for the contract ID of the terminal 31, the voice VPN group numbers of the terminal 31 and the terminal 33 are acquired from the external line / extension conversion table 14B and compared. Then, it is confirmed that the terminal 31 and the terminal 33 are in the same voice VPN group, and as a result, it is determined that the terminal 31 can transmit to the terminal 33.

  On the other hand, with respect to the transmission request from the terminal 32 to the terminal 33, since the restriction other than the same base is set for the contract ID of the terminal 32, the base numbers of the terminal 32 and the terminal 33 are acquired from the external line / extension conversion table 14B. To be compared. Then, it is confirmed that the terminal 32 and the terminal 33 are different bases. As a result, it is determined that the terminal 32 cannot make a call to the terminal 33.

  As described above, in the present embodiment, the call restriction information related to the terminal to be accommodated is managed in the basic contract ID table 14C of the call control server 10, and in response to the call request from the terminal, the call related to the calling terminal is transmitted. Since the restriction information is referred to determine whether or not the call to the destination terminal corresponding to the destination telephone number specified in the call request is made, individual call restriction for each terminal accommodated in the call control server 10 Can be applied.

Therefore, in the voice VPN service of the VoIP service system, it is possible to provide a call restriction function for individual terminals.
Moreover, instead of the conventional outgoing / incoming restrictions between network systems that are fixedly determined by the presence or absence of physical facilities for connection between networks, for example, according to a request from a user, a basic contract ID table The content of the outgoing call restriction service can be flexibly changed with respect to an arbitrary terminal by an extremely simple operation of changing the outgoing call restriction content.

If the destination telephone number specified in the call request is an extension number, the extension number of the called terminal is acquired with reference to the extension / outside line conversion table 14A, and whether or not the call is permitted is determined based on the outside line number. Since it did in this way, the transmission control with respect to an outside line transmission and an internal line transmission can be determined collectively by the same process.
Therefore, it is not necessary to provide separate processing for outgoing call control for external line transmission and internal line transmission, the program for call control processing to be installed in the call control server can be simplified, and the work burden required for designing the program is reduced. Can be greatly reduced.

[Second Embodiment]
Next, a VoIP service system according to the second embodiment of the present invention will be described with reference to FIG. FIG. 9 is an explanatory diagram showing the configuration of the VoIP service system according to the second embodiment of the present invention. The configuration of the call control server 10 is the same as that shown in FIG. 2 described above, and a detailed description thereof is omitted here.

  In the first embodiment described above, the case where the calling terminal 31 and the called terminal 33 are accommodated in the same call control server 10 has been described as an example. In the present embodiment, a case where the calling terminal 31 and the called terminal 33 are accommodated in different call control servers 10A and 10B will be described as an example.

  In FIG. 9, the call control servers 10A and 10B have substantially the same configuration as the above-described call control server 10 (see FIG. 2), but in the external / extension table 14B, the terminals under their own devices. It only manages information about. That is, the call control server 10A manages only the information on the terminals 31 and 32, and the call control server 10B manages only the information on the terminal 33.

  Therefore, when a call request from the terminal 31 to the terminal 33 is received, the call restriction determination means 15B of the call control server 10A determines that the caller terminal 10 determines from the external line / extension conversion table 14B of its own device in step 102 of FIG. The voice VPN group number related to No. 33 cannot be acquired, and it is not possible to determine whether or not the call is permitted for restrictions other than the same group corresponding to the call restriction information “2”. In addition, when the extension number of the terminal 33 is specified in the transmission request from the terminal 31, it is possible to determine whether or not there is a transmission restriction for restrictions other than the same base based on the base number included in the extension number. When the external number of the terminal 33 is specified in the transmission request, the extension number of the terminal 33 cannot be acquired, and it is not possible to determine whether or not the transmission can be made for regulations other than the same base.

  In the present embodiment, when the calling side terminal 31 and the called side terminal 33 are accommodated in different call control servers 10A and 10B, the call restriction determination means 15B of the call control server 10A performs the first embodiment described above. The call restriction is determined in the same manner as in the form, and if it is determined that the call can be made in this determination, the call control means 15A obtains the voice VPN group number, extension number, and call restriction information to which the calling terminal 31 belongs. A connection request from the side call control server 10A is notified to the called side call control server 10B, and the outgoing call restriction determination means 15B of the called side call control server 10B is used to determine the presence or absence of outgoing call restrictions on the calling terminal 31. It is.

[Operation of Second Embodiment]
Next, with reference to FIG. 10, the outgoing / incoming processing operation of the VoIP service system according to the second embodiment of the present invention will be described. FIG. 10 is a sequence diagram showing an outgoing call processing operation of the VoIP service system according to the second embodiment of the present invention.
Here, in the VoIP service system of FIG. 9 described above, a case where transmission is made from the terminal 31 of the base 40 to the base 41 terminal 33 in the same voice VPN group will be described as an example.

  When the call control unit 15A of the call control server 10A receives a call request from the terminal 31, the call control unit 15A executes a call restriction determination process and a call process similar to the steps 100 to 111 in FIG. 8 described above. Then, since the called side management device is the call control server 10B and is not its own device, a connection request is transmitted to the call control server 10B (step 130). At this time, the call control means 15A obtains the voice VPN group number and extension number of the calling terminal 31 from the external line / extension conversion table 14B of the storage unit 14 and stores the call restriction information of the calling terminal 31 in the storage unit 14. Are obtained from the basic contract ID table 14C, and the transmission restriction judgment information is added to the connection request to the call control server 10B and transmitted.

In response to a connection request from the call control server 10A received via the communication I / F unit 11, the call control unit 15A of the call control server 10B causes the incoming / outgoing restriction determination unit 15B to change from the calling terminal 31 to the called terminal. It is determined whether or not transmission to 33 is possible (step 131).
At this time, the outgoing / incoming call restriction determination means 15B obtains the voice VPN group and extension number of the called terminal 31 from the destination telephone number specified in the connection request with reference to the outside line / extension conversion table 14B. In the same manner as in the first embodiment described above, the calling terminal 31 is based on the call restriction determination information including the caller voice VPN group number, the caller extension number, and the caller call restriction information added to the connection request. It is determined whether or not a call can be made from the mobile phone to the callee terminal 33.

  If it is determined in this outgoing call restriction determination that outgoing calls are impossible (step 131: NO), the call control unit 15A of the call control server 10B sends a connection error from the communication I / F unit 11 via the IP network 20 to the call control server. It is transmitted to 10A (step 132). This connection error is notified to the voice guidance server 50 via the call control server 10A (step 133). In response to this, the voice guidance server 50 notifies the terminal 31 that the call cannot be made by voice guidance (step 134), and the series of call processing ends.

  On the other hand, if the connection is possible (step 131: YES), the call control means 15A of the call control server 10B uses the external line number of the calling terminal 31 based on the IP address of the called terminal 33 acquired from the external line / extension conversion table 14B. Is transmitted from the communication I / F unit 11 to the terminal 33 via the IP network 20 (step 140).

In response to a connection request from the call control server 10B, the terminal 33 notifies the user of the incoming call by sending a ringtone from a speaker or displaying an incoming call using an LED or LCD (step 141). A response is notified to the call control server 10B in response to a response operation by the person (step 142).
The response from the terminal 33 is notified to the call control server 10A via the call control server 10B (step 143), and further notified from the call control server 10A to the originating terminal 31 (step 144).

  As a result, a RTP (Real-time Transport Protocol) session is established between the terminal 31 and the terminal 33 via the IP network 20, and VoIP voice communication is started (step 145). The outgoing call processing operation ends.

  Thus, in the present embodiment, when a connection request is transmitted from the calling side call control server to the called side call control server, the voice VPN group number, extension number, and outgoing call restriction information to which the calling terminal belongs belong to the connection request. The request is notified to the called-side call control server, and the outgoing call restriction determination means of the called-side call control server determines whether or not the call can be made to the calling terminal based on the information about the calling terminal added to the connection request. Therefore, even when the calling side terminal 31 and the called side terminal 33 are accommodated in different call control servers 10A and 10B, the outgoing call regulation related to the calling side terminal, for example, restrictions other than the same group, It is possible to determine in detail the regulations other than those at the same base when designated by.

  Note that the outgoing call restriction determination information is not limited to the outgoing voice VPN group number, the outgoing call extension number, and the outgoing call origination restriction information, and may be changed in a timely manner according to the content of outgoing call restriction. At this time, various kinds of information may be notified by the outgoing call restriction judgment information so that the incoming call control server can judge any restriction contents, and only the restriction contents of the outgoing call restriction information set in the calling terminal are received. Only specific information may be notified so that the side call control server can determine.

[Extended embodiment]
In each of the above embodiments, the case where each terminal is managed by one call control server 10 has been described as an example. However, the number of call control servers can be flexibly increased or decreased according to the configuration of each terminal or base. It is possible to obtain the same effects as described above.

  When various control packets are exchanged between the call control server 10 and another management device or between the call control server 10 and the voice guidance server 50, various control packets may be exchanged via the IP network 20, Various control packets may be exchanged via an IP network other than the IP network 20.

  In addition, the call control packet exchanged between the call control server 10 and the terminal has a very small amount of data and delay is not a problem. Further, VoIP voice communication does not pass through the call control server 10 and the IP network 20. Therefore, the call control server 10 is provided in an external IP network (not shown) connected to the IP network 20 via a WAN line, and the WAN line and the external IP network are used. The call control of each terminal may be performed.

  In addition, the extension / external line conversion table 14A and the external line / extension conversion table 14B add and manage the voice VPN group number corresponding to each entry, and when searching for the external line number from the destination telephone number, and from the external line number When searching for an IP address, only the entry of the same voice VPN group number as that of the calling terminal may be searched. Thereby, call control for a plurality of different voice VPN groups can be performed by one call control server, and a VoIP service system can be efficiently constructed.

It is a block diagram which shows the structure of the VoIP service system concerning the 1st Embodiment of this invention. It is a block diagram which shows the structural example of the call control server used with the VoIP service system concerning the 1st Embodiment of this invention. It is an example of a structure of the extension / outside line conversion table used with the VoIP service system concerning the 1st Embodiment of this invention. It is an example of a structure of the external line / extension conversion table used with the VoIP service system concerning the 1st Embodiment of this invention. It is a structural example of the basic contract ID table used with the VoIP service system concerning the 1st Embodiment of this invention. It is an example of a structure of the specific number control table used with the VoIP service system concerning the 1st Embodiment of this invention. It is a structural example of the routing information table used with the VoIP service system concerning the 1st Embodiment of this invention. It is a sequence diagram which shows the transmission process of the VoIP service system concerning the 1st Embodiment of this invention. It is a block diagram which shows the structure of the VoIP service system concerning the 2nd Embodiment of this invention. It is a sequence diagram which shows the transmission process of the VoIP service system concerning the 2nd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Call control server, 11 ... Communication I / F part, 12 ... Screen display part, 13 ... Operation input part, 14 ... Memory | storage part, 14A ... Extension / external line conversion table, 14B ... External line / extension conversion table, 14C ... Basic Contract ID table, 14D ... specific number restriction table, 14E ... routing information table, 14P ... program, 15 ... control unit, 15A ... call control means, 15B ... outgoing restriction determination means, 20 ... IP network, 31-33 ... terminal, 40, 41 ... base, 50 ... voice guidance server.

Claims (3)

VoIP that realizes voice communication with the terminal using the IP network by accommodating each terminal in a call control server and performing call control for a plurality of terminals that transmit and receive voice packets via the IP network A service system,
The call control server
A basic contract ID table for managing the contents of the outgoing call regulation for each terminal accommodated;
In the basic contract ID table, information relating to no restriction, restriction other than the base, restriction other than the VPN group, specific number band restriction, is held as outgoing restriction information.
Transmission restriction determination means for determining whether or not transmission to a predetermined destination telephone number is possible based on the content of transmission restriction regarding an arbitrary terminal acquired from the basic contract ID table;
In response to a call origination request from the terminal, the call origination terminal and the destination call are confirmed after the call restriction judgment means confirms that the call can be made from the call origination terminal for the call destination telephone number specified in the call origination request. Call control means for starting call control for establishing voice communication with the called terminal corresponding to the number ,
The call control means includes
During the call control, if the called terminal is accommodated in another call control server, the calling terminal
Acquired from the basic contract ID table for a connection request instructing a call from the terminal to the called terminal
Added to the outgoing call terminal, the incoming call containing the called terminal is accommodated.
To the control server,
In response to a connection request from another call control server, another call control added to the connection request
Based on the outgoing call restriction judgment information of the server, the previous caller terminal indicated by the connection request
A VoIP service system, which determines whether or not a call can be made to a writing-side terminal. To accommodate a plurality of terminals that transmit and receive voice packets over an IP network and perform call control
VoIP service system for realizing voice communication at the terminal using the IP network
A call control server of
A basic contract ID table for managing the contents of the outgoing call regulation for each terminal accommodated;
The basic contract ID table includes no restriction, restriction other than the base,
Holds information related to regulations other than VPN groups, specific number band regulations,
Based on the content of the outgoing call regulation for any terminal acquired from the basic contract ID table
A call restriction determination means for determining whether or not a call can be made to a predetermined destination telephone number;
In response to a call request from the terminal, for the destination telephone number specified in the call request
After confirming that the call from the calling terminal is permitted by the calling restriction determination means, the calling terminal and the call receiving terminal are connected.
Call control for starting call control for establishing voice communication with the called terminal corresponding to the destination telephone number
Means and
The call control means includes
During the call control, if the called terminal is accommodated in another call control server, the calling terminal
Acquired from the basic contract ID table for a connection request instructing a call from the terminal to the called terminal
Added to the outgoing call terminal, the incoming call containing the called terminal is accommodated.
To the control server,
In response to a connection request from another call control server, another call control added to the connection request
Based on the outgoing call restriction judgment information of the server, the previous caller terminal indicated by the connection request
A call control server characterized by determining whether or not a call can be made to a writing-side terminal. For a plurality of terminals that transmit and receive voice packets via the IP network, the call control server
By accommodating the terminal and performing call control, voice communication with the terminal using the IP network is performed.
A call control method for a VoIP service system,
By the call control server, the contents of the outgoing call regulation regarding each of the terminals accommodated are changed to the basic contract I.
Outgoing call regulation management step managed by D table;
In the basic contract ID table, there is no restriction, restriction other than the base,
Holding information on regulations other than VPN groups, specific number band regulations,
Regarding any terminal acquired from the basic contract ID table by the call control server
A call restriction judgment process that determines whether or not a call can be made to a specified destination telephone number based on the contents of the call restriction.
Tep,
Specified in the call request by the call control server in response to the call request from the terminal.
Confirm that the call from the calling terminal can be made to the destination telephone number at the call restriction judgment step.
After that, voice communication establishment between the calling terminal and the called terminal corresponding to the called telephone number is established.
A call control step for initiating call control for
The call control step includes:
During the call control, if the called terminal is accommodated in another call control server, the calling terminal
Acquired from the basic contract ID table for a connection request instructing a call from the terminal to the called terminal
Added to the outgoing call terminal, the incoming call containing the called terminal is accommodated.
Sending to the control server;
In response to a connection request from another call control server, another call control added to the connection request
Based on the outgoing call restriction judgment information of the server, the previous caller terminal indicated by the connection request
A step of determining whether or not transmission to the depositing terminal is possible;
A call control method comprising:

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