JP5890448B2 - PBX device call restriction method, PBX device, and PBX control program - Google Patents

Description

  The present invention provides a temporary PBX (Private Branch eXchange) system that provides a temporary telephone service using a mobile terminal such as a smartphone that has been used in the past in a disaster area where a telephone has become unavailable due to a large-scale disaster or the like The present invention relates to a PBX apparatus call restriction method and a PBX apparatus using the same.

  Smartphones that have been used in the past by installing temporary PBX systems that support wireless LAN (Local Area Network) in multiple locations within the disaster area in areas where telephones have become unavailable due to large-scale disasters, etc. Providing a temporary telephone service using a mobile terminal is under consideration. However, when constructing a temporary PBX system using a conventional PBX device, the administrator has a function to forcibly disconnect the call manually, but there is no limit on the maximum call possible time for each terminal. When there is a call connection request from a terminal, it is easy to fall into a congestion state (for example, see Non-Patent Document 1).

  In addition, during a large-scale disaster, a temporary telephone service is provided by installing a special public telephone (for example, see Non-Patent Document 2). As a result, the victim can use the disaster message dial (No. 171) or contact a family member or acquaintance free of charge using a special public telephone. However, even with this special pay phone, there is no restriction on the use time per call, so the waiting time until the call can be made becomes long, and the operator of the special pay phone can use the system for self-control. It was necessary to call on.

Infiniti Talk, Infiniti (registered trademark) homepage, [online], [Search January 8, 2014], Internet <URL: http://www.infinitalk.co.jp/about/function> NTT East, “Installation of special public telephones at evacuation shelters during disasters”, [online], [Search January 8, 2014], Internet <URL: http://www.ntt-east.co.jp /saigai/taisaku/kakuho_04.html>

  As described above, when a temporary PBX system is constructed using a conventional PBX device, the user's callable time cannot be limited. That is, it is not possible to limit the use time per call for each terminal, or limit the time until the next call can be made after a call. For this reason, there has been a problem that when a call request is made from a very large number of terminals or when a specific user occupies a line for a long time call or the like, the terminal is easily congested.

  The present invention has been made in order to solve the above-described problem. Even when there are call connection requests from a large number of terminals in the PBX system, the occurrence of congestion is reduced and a fair call is made between users. The purpose is to provide services.

In order to achieve the above object, the present invention limits the call time for one call between extension telephone terminals accommodated in a PBX device and between the extension telephone terminal and an external telephone terminal, A call restriction method for a PBX device for individually restricting a call by a call according to each call connection request type of an extension call from each extension phone terminal, an outside line call, and an outside line call to each extension phone terminal, the PBX device However, for all calls made through itself, the call history including the caller phone number, the callee phone number, the call date and time, and the call time is stored in the storage unit, and the call restriction function is enabled. for each of the call connection request type are, during a call initiation by the call according to the call connection request type, reproduces the voice guidance for notifying a predetermined communicable time, said call enable time from the start of the call elapsed A predetermined time before that, after reproducing the voice guidance to notice the disconnection of the line, at the time the talk time has reached the call enable time, as well as forced disconnect the line, by referring to the call history, the call For each extension telephone terminal that has made a call by a call related to the connection request type , until the predetermined call unavailable time elapses after the last call ends, the call related to the next call connection request type The voice guidance for notifying the calling user that the call is not possible is reproduced without performing the call connection in response to the connection request.

  By doing so, it is possible to prevent the line from being occupied for a long time by a specific user, and to provide a call opportunity equally to all users.

In addition, the present invention limits the call time for one call between the extension telephone terminals accommodated in the PBX device and between the extension telephone terminal and the external telephone terminal, and from each extension telephone terminal. A call restriction method of a PBX device for individually restricting calls by calls according to each call connection request type of extension line transmission, external line transmission, and external line reception to each extension telephone terminal, wherein the PBX device passes through itself The call connection request type in which a call history including a caller telephone number, a callee telephone number, a call date and time, and a call time is stored in a storage unit and the call restriction function is set to be effective for all calls made each, through upon receiving the call connection request according to the call connection request type, by referring to the call history, according to the call according to the call connection request type for the extension telephone terminals within a predetermined time If the total call time obtained by summing up the call times for each call made is equal to or longer than the predetermined maximum call available time, the call source request is not made to the caller user without making a call connection in response to the call connection request. When the voice guidance for notifying that the call is not possible is played back and the total call time is less than the maximum call available time, a call connection is made in response to the call connection request, and the maximum call available at the start of the call A voice guidance for notifying the time when the total call time is subtracted from the time as a callable time is played, and a voice guidance for notifying the disconnection of the line is issued a predetermined time before the callable time elapses after the call is started. After playback, the line is forcibly disconnected when the call time reaches the call available time.

  By doing this, it is possible to prevent the line from being occupied for a long time by a specific user, and to distribute the call time fairly to all users.

  According to still another aspect of the present invention, in the call restriction method for the PBX device, the PBX device has been used in the past by accommodating a mobile phone terminal, a general-purpose PC (Personal Computer), or a fixed telephone as an extension phone terminal. By registering a mobile phone number or a subscriber phone number as an extension phone number, an extension call service and an outside call service using the telephone numbers that have been used in the past are provided.

  In this way, even if a temporary telephone service is provided by a temporary PBX system installed in a disaster-stricken area that has become unavailable due to a large-scale disaster, etc., the line is extended for a long time by a specific user. In addition to preventing the user from being occupied, it is possible to provide a call opportunity evenly to all users and to distribute the call time fairly.

Further, the present invention limits the call time for one call between the extension telephone terminals accommodated by itself and between the extension telephone terminal and the external telephone terminal, and transmits the extension from each extension telephone terminal. A PBX device that individually regulates a call by a call according to each call connection request type of an outside line transmission and an outside line incoming call to each extension telephone terminal, and for all calls made through itself, a storage unit having a call history information stored call history including a number and destination telephone numbers and call time and call time, for each of the call connection request type of call limiting function is enabled, the call connection during a call initiation by the call according to request type, reproduces the voice guidance for notifying a predetermined communicatable time, before a predetermined time during which the call enable time from the start of the call is passed to notice the disconnection of the line After playing the voice guidance, when the call time has reached the call enable time, as well as forced disconnect the line, by referring to the call history, the call by the call according to the call connection request type is performed For each extension telephone terminal, until the predetermined call unavailable time elapses after the last call ends, without performing a call connection for the call connection request related to the next call connection request type , Communication management means for reproducing voice guidance for notifying the caller that the call is impossible is provided.

  By doing so, it is possible to prevent the line from being occupied for a long time by a specific user, and to provide a call opportunity equally to all users.

Further, the present invention limits the call time for one call between the extension telephone terminals accommodated by itself and between the extension telephone terminal and the external telephone terminal, and transmits the extension from each extension telephone terminal. A PBX device that individually regulates a call by a call according to each call connection request type of an outside line transmission and an outside line incoming call to each extension telephone terminal, and for all calls made through itself, a storage unit having a call history information stored call history including a number and destination telephone numbers and call time and call time, for each of the call connection request type of call limiting function is enabled, the call connection upon receiving the call connection request according to the request type, wherein by referring to the call history, the call the call by the call has been made according to the call connection request type for the extension telephone terminals within a predetermined time If the total call time obtained by adding up the call time is equal to or longer than the predetermined maximum call available time, the caller is notified that the call cannot be made without performing call connection in response to the call connection request. When the total call time is less than the maximum callable time, a call connection is made in response to the call connection request, and the total call time is calculated from the maximum callable time at the start of the call. The voice guidance that notifies the reduced time as the callable time is played back, and after the voice guidance for notifying the disconnection of the line is played before a predetermined time elapses after the call starts, the call time is Communication management means for forcibly disconnecting the line when the call available time is reached is provided.

  By doing this, it is possible to prevent the line from being occupied for a long time by a specific user, and to distribute the call time fairly to all users.

  According to another aspect of the present invention, in the PBX device, a mobile phone terminal, a general-purpose PC, or a fixed telephone is accommodated as an extension telephone terminal, and a mobile phone number or a subscriber telephone number that has been used is used as an extension telephone number. By registering as a subscriber, an extension call service and an outside line call service using a telephone number used in the past are provided.

  In this way, even if a temporary telephone service is provided by a temporary PBX system installed in a disaster-stricken area that has become unavailable due to a large-scale disaster, etc., the line is extended for a long time by a specific user. In addition to preventing the user from being occupied, it is possible to provide a call opportunity evenly to all users and to distribute the call time fairly.

  Another aspect of the present invention is a PBX control program for causing a computer to function as the PBX device.

  In this way, the computer can function as the PBX device to prevent a specific user from occupying a line for a long time, and evenly provide a call opportunity to all users, Or call time can be allocated.

  According to the present invention, even when there are call connection requests from a large number of terminals in the PBX system, it is possible to reduce the occurrence of congestion and provide a fair call service between users.

It is explanatory drawing which shows schematic structure of the temporary PBX system which concerns on this invention. It is explanatory drawing which shows the structural example of the temporary PBX system to which the some mobile switching center was connected. It is explanatory drawing which shows the outline of a function structure of the PBX apparatus which concerns on this invention, and a telephone call restriction | limiting operation | movement. It is explanatory drawing which shows the operation example of the 1st call restriction method which concerns on this invention. It is a structure and data example of call restriction setting information. It is a structure and data example of call history information. It is a list of voice guidance reproduced by a PBX device. It is a flowchart which shows operation | movement of a telephone call restriction | limiting function (extension transmission / outside line transmission). It is a flowchart which shows operation | movement of a telephone call restriction | limiting function (external line incoming call). It is a flowchart which shows operation | movement of a telephone call restriction | limiting function (extension call | reception). It is explanatory drawing which shows the 1st operation example of the 2nd call restriction method which makes call possible time of each call variable. It is explanatory drawing which shows the 2nd operation example of the 2nd call restriction method which makes call possible time of each call variable. It is explanatory drawing which shows the 1st operation example of the 3rd call limiting method which makes call possible time of each call variable. It is explanatory drawing which shows the 2nd operation example of the 3rd call limiting method which makes call possible time of each call variable. It is a list of reliability levels of subscriber telephone numbers.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings as appropriate.

  FIG. 1 is an explanatory diagram showing a schematic configuration of a temporary PBX system using a PBX device according to the present invention installed as a mobile switching center (temporary PBX device) 1. When a temporary PBX system is constructed using a conventional (commercially available) PBX device, the same configuration is used, and the mobile switching center 1 installed in the disaster area includes a public telephone network 8 and a gateway 6 via a gateway 6. It is connected to a mobile phone network 7 or an IP (Internet Protocol) network 9 connected to the destination. In the temporary LAN 2, the mobile switching center 1 and each terminal device in the disaster area are wired by a HUB 21 and a LAN cable, or wirelessly connected via a wireless LAN base station (access point) 22.

  By the way, in the conventional PBX device, the registration operation of the subscriber information (terminal unit identification number of the terminal device, extension telephone number to be assigned and IP address, etc.) of the terminal device newly accommodated as an extension telephone terminal is registered with expert knowledge. It is necessary for an SO (Service Order) registrant to have authority, and it takes considerable time to secure the personnel and complete the work. On the other hand, in the PBX device according to the present invention, a mobile phone number (in the case of the mobile phone terminal 3) or a subscriber phone number (general-purpose PCs 4a and 4b, IP fixed phone) that has been used in the past by the user's own operation. Subscriber registration with the extension telephone number as in 5a) is possible. As a result, the work of the SO registrant becomes unnecessary, so that the telephone service using the existing mobile phone terminal 3, the general-purpose PC 4, and the fixed telephone 5 can be provided at an early stage.

  FIG. 2 is an explanatory diagram showing a configuration example of a temporary PBX system in which a plurality of mobile switching centers are connected. As shown in FIG. 2, when a plurality of mobile switching centers 1 are connected to each other and each subscriber information is shared, the subscriber registration under each mobile switching center 1 It is possible to make an extension call between the extension telephone terminals. Further, in such a configuration, if any one mobile switching center 1 is connected to the public telephone network 8 or the IP network 9 via the gateway 6, the mobile switching center 1 relays the call. Thus, the extension telephone terminals under the control of all the mobile switching centers 1 can also make external calls.

  FIG. 3 is an explanatory diagram showing the outline of the functional configuration and call restriction operation of the PBX device according to the present invention. In the example of FIG. 3, the case where the temporary PBX system is configured by one mobile switching center is shown. However, as shown in FIG. 2, the temporary PBX system is composed of a plurality of mobile switching centers connected to each other. It may be configured.

  As shown in FIG. 3, the mobile switching center 1 includes an IP-PBX server (PBX device) 11 and a management terminal 12 connected to a public telephone network 8 and an IP network 9 via a gateway 6. . The IP-PBX server 11 is wired to a control unit (not shown) that executes a predetermined PBX control program, a storage unit (not shown) that stores a PBX control program and various data necessary for the execution, and other devices. And a computer having a communication interface (not shown) for performing wireless communication. The PBX control program can be stored in a recording medium and read into a computer, or can be received by a computer via a network.

  A communication management unit (communication management means) 14 whose function is embodied by the control unit executing a predetermined PBX control program is a call connection request related to extension transmission and extension transmission from the extension telephone terminals 3 and 4, A call connection process is performed by accepting a call connection request related to an incoming call from an external telephone terminal (not shown) received via the gateway 6. Details will be described later with reference to FIGS.

  The storage unit includes a subscriber database 13, call restriction setting information 15, and call history information 16.

  In the subscriber database 13, subscriber information of all the extension telephone terminals 3 and 4 that have been registered with the IP-PBX server 11 is registered. The subscriber information includes an extension telephone number of an extension telephone terminal used by each user (a mobile phone number or a subscriber telephone number that each user has been using), an IP address assigned to the extension telephone terminal, User information such as the user's name and the reliability level are included. The communication management unit 14 refers to this subscriber database 13 when processing a call connection request from the extension telephone terminals 3 and 4 connected to the temporary LAN 2 and a call connection request accepted via the gateway 6. Process.

  In the call restriction setting information 15, data serving as control parameters for the call time restriction operation and the connection restriction operation set by the operation manager of the temporary PBX system are registered. When performing the call connection process, the communication management unit 14 refers to the call restriction setting information 15 and controls the call time restriction operation and the connection restriction operation.

  In the call history information 16, call history data including the call date and time and the call time are sequentially registered for all calls in which the call connection is completed and the call is started. The communication management unit 14 also refers to the call history information 16 when controlling the call time limit operation and the connection restriction operation.

<First call restriction method>
In the first call restriction method according to the present invention, the call time restriction operation for restricting the call time per call and the next call cannot be performed until a predetermined time has elapsed after the user finished the call. Call restriction is performed in combination with the connection restriction operation.

  In the call time limit operation, the maximum callable time per call is set by the operation manager of the temporary PBX system, and the elapsed time (call time) since the user started the call is set. When the maximum callable time is reached, the call is forcibly disconnected (forced disconnection in FIG. 3). However, since the user will be confused if the call is disconnected without any foresight, a voice guidance indicating that there is a call time limit will be played at the beginning of the call (not shown), and the call will be made soon before disconnecting the call. Voice guidance (cutting notice in FIG. 3) for cutting is played.

  In the connection restriction operation, the call history of all extension users is recorded, and when the extension user tries to make a call, the call is made by calling from the user during the call unavailable time set by the operation manager. If the call was made, the call is not allowed. Also, for incoming calls from outside lines, if the connected extension user has made a call by other outside line during a predetermined call unavailable time, the call is not permitted. In that case, a voice guidance (not callable in FIG. 3) is sent to the effect that the user of the caller should make a call again after a while so as not to make a call again.

  As a result, the extension user who has made a call by extension call or outside call cannot make a call by a new extension call or outside line until the predetermined call unavailable time elapses after the call ends. In addition, for an extension user who has made a call by an outside line incoming call, the call connection is not made even if a new outside line incoming call is received after the call ends and until a predetermined call unavailable time elapses.

  It should be noted that extension incoming calls are not subject to connection restriction operations, and therefore, an extension user who has made a call by an extension call can immediately make a call by a new extension call when the call ends. For extension calls, the call time limit operation is applied to the corresponding extension calls, so the call time is indirectly limited.

  FIG. 4 is an explanatory diagram showing an operation example of the first call restriction method according to the present invention. In the first call restriction method, both the maximum callable time per call and the call unavailable time until the next call is permitted are fixed values. In the example of FIG. 4, it is assumed that the maximum callable time is set to 3 minutes and the call disabled time is set to 5 minutes. In the figure, a thick horizontal arrow indicates a call time, a broken horizontal arrow indicates a call disable time, a thick vertical arrow indicates a call connection request, and a cross indicates that the call connection request is disabled.

  In FIG. 4, it is assumed that neither Mr. A nor Mr. B made a call for at least 5 minutes before 15:00. Next, suppose that Mr. A started a call at 15:00 by extension or outside line transmission, voice guidance (call time guidance, not shown) that the call time is limited to 3 minutes at the beginning is given. Flowing. Assuming that the pre-disconnection notice time is set to 60 seconds, the voice guidance that the call will soon be disconnected when the call time reaches 2 minutes (15:02) Flows. If the call is still ongoing, when the call time reaches 3 minutes (15: 3), a voice guidance indicating that the call end time has arrived (call end time has arrived, not shown) The call is forcibly disconnected.

  After that, Mr. A can make a call even if he / she makes an internal or external call again from 15: 3 when the call is finished until the call disallowed time (5 minutes) elapses (before 15: 8). Without being permitted, a voice guidance (not callable, not shown) to the effect that a call should be made after a while flows. Then, when Mr. A makes an internal line call or an external line call again at 15: 8, at this point in time, the call-disabled time of 5 minutes has already passed, so the call can be made again up to 3 minutes.

  On the other hand, if Mr. B starts a call by receiving an outside line at 15:00, voice guidance (call time guidance, not shown) is played to the effect that the call time is limited to 3 minutes. Here, it is assumed that Mr. B ends the call when the call time reaches 1 minute (before the disconnection notice flows). After that, even if an outside line is received again from 15:01 when the call was terminated until 5 minutes have passed (before 15: 6), the call is not permitted. Then, a voice guidance (not callable, not shown) is sent to the outside line telephone terminal that is the caller after a while. Then, if there is an incoming incoming call to Mr. B again at 15: 6, the call-disabled time of 5 minutes has already passed at this point, so it is possible to make a call again up to 3 minutes.

  Even if this call ends in 1 minute, Mr. B will not be allowed to call outside even if he receives an outside call to Mr. B before 15:12 when the call unavailable time (5 minutes) passes again. Become.

FIG. 5 is a configuration and data example of call restriction setting information according to the first call restriction method. As shown in FIG. 5, the call restriction setting information 15 includes an extension / outline call record in the first line related to the call restriction function at the time of an extension call and an outside call, and two lines related to a call restriction function at the time of an outside line call. It consists of a record for incoming calls on the outside line. Each of these two records has fields of an object, a valid / invalid flag, a maximum callable time, a call disable time, and a pre-disconnection notice time.
The extension / outline transmission record in the first row may be divided into two records for extension transmission and external transmission, and data may be set individually.

  Here, the target represents the type of call connection request that is the target of the call restriction function. The valid / invalid flag indicates whether the call restriction function is valid or invalid. If the value is “on”, call restriction is performed by the call restriction function, and if the value is “off”, call restriction is performed. I will not. The maximum callable time is the maximum time (in minutes) that a call can be made per call when the call restriction function is enabled. When the call time reaches this value, the call is forcibly disconnected. . The call disabling time is a time (in minutes) when a call for a call connection request of the same type is not permitted after the call ends. Also, the pre-disconnection notice time is set for how many seconds before the call reaches the maximum callable time before the voice notice for the notice of disconnection is played.

  In the example of FIG. 5, the maximum callable time and the call impossible time are in minutes, but may be in seconds. The setting range of the maximum callable time and the call disable time is preferably set to a value between approximately 1 minute and 60 minutes. The pre-cutting notice time is preferably set to a value between approximately 10 seconds and 180 seconds.

  Next, a method in which the operation manager of the temporary PBX system registers the call restriction setting information 15 will be described. The operation manager can start or stop the application of the call restriction function or change the operation parameter by inputting a setting command in a predetermined format from a keyboard (not shown) provided in the management terminal 12.

For example, if the name of the setting command for outgoing / outgoing line call is “outgoing_param_set”, the name of the setting command for incoming call is “incoming_param_set”, and four of P1 to P4 are parameters,
outgoing_param_set P1 P2 P3 P4
Where P1: Valid / Invalid flag ("on" or "off")
P2: Maximum call time (in minutes)
P3: Call unavailable time (in minutes)
P4: Notice time before disconnection (in seconds)
Can be registered in each field of the first line of the call restriction setting information 15.

Similarly,
incoming_param_set P1 P2 P3 P4
However, values of the parameters P1 to P4 can be registered in the fields of the second row of the call restriction setting information 15 by inputting the same command as described above.

  Instead of inputting these setting commands directly from the keyboard of the management terminal 12, a predetermined script file including descriptions of these setting commands is separately created, and the script file is executed from the management terminal 12. It may be a thing.

  FIG. 6 shows a configuration and data example of call history information. As shown in FIG. 6, the call history record registered in each row of the call history information 16 includes fields for call end date and time, caller telephone number, caller type, caller telephone number, callee type, and call time. Have

  Here, as the call end date and time, the date and time when the call is ended and the call history record is added at the end or the beginning is registered. Therefore, each call history record is sorted in ascending or descending order of the call end date and time. The caller telephone number is a telephone number of a caller telephone terminal that has made a call that triggers the call. The caller type is data representing whether the caller's telephone terminal is an extension telephone terminal (extension) or an external telephone terminal (external line). The call destination telephone number is the telephone number of the telephone terminal of the call destination (also called the connection destination or the destination) of the call. The destination type is data representing whether the destination telephone terminal is an extension telephone terminal (extension) or an external telephone terminal (external line). In the call time, an elapsed time from when the call is started to when it is ended is recorded. A call start date / time field may be provided instead of the call time, and the call time may be calculated from the call end date / time and the call start date / time.

  In the data example of FIG. 6, the call history record in the first line is when an external line is transmitted from the extension terminal to the external terminal, the second line is when the extension is transmitted from the internal terminal to another extension terminal, and the third line is from the external terminal. Each of the cases where an outside line is received for an extension terminal is shown.

  FIG. 7 is a list of voice guidance reproduced by the PBX device. The call time guidance on the first line notifies the callable time at the start of a call when the call restriction function is enabled and the call time per call is restricted. Here, the XX portion is automatically changed according to the value of the maximum callable time set in the call restriction setting information 15 of FIG. In the second line, if the call restriction function is enabled and the same type of call connection request is made before the call disabling time has elapsed since the previous call ended, the calling user is not allowed to call. Is to be notified. In addition, you may make it notify also of the remaining time until a call impossible time expires.

  The disconnection notice on the third line is a notice that the call will be disconnected before the call is forcibly disconnected due to the call time restriction when the call restriction function is enabled. Here, the YY portion is automatically changed according to the pre-disconnection notice time value set in the call restriction setting information 15 of FIG. The arrival of the call end time on the fourth line notifies that the call is forcibly disconnected immediately before the call is forcibly disconnected due to a call time limit. Here, the ZZ portion is automatically changed according to the value of the call disabled time set in the call restriction setting information 15 of FIG.

  Next, the operation of the call restriction function according to the first call restriction method will be described in detail with reference to the flowcharts of FIGS.

  FIG. 8 is a flowchart showing the operation of the call restriction function for the internal line transmission and the external line transmission. This operation is started when a call connection request relating to an extension transmission or an external transmission from a subordinate extension terminal is received, and the communication management unit 14 (see FIG. 3) first sets the call restriction setting information 15 ( The valid / invalid flag value of the extension / outline transmission record registered in FIG. 5 is determined. As a result of the determination, if the value of the valid / invalid flag is on, the communication management unit 14 proceeds to step S82, and if the value of the valid / invalid flag is off, proceeds to step S8d.

  In step S82, the communication management unit 14 acquires a caller telephone number from the received call connection request. Next, in step S83, the value of the call unavailable time (for example, 5 minutes) is acquired from the call restriction setting information 15, and the latest call with the caller telephone number from the current date and time before the call unavailable time as the caller. Try to get history. As a result, if the corresponding call history can be acquired (Yes in step S84), the process proceeds to step S8c. If the corresponding call history cannot be acquired (No in step S84), the process proceeds to step S85. Proceed.

  In step S8c, the communication management unit 14 has not yet passed the previous call since the previous call has ended, so after playing the call impossible guidance (see FIG. 7), the communication manager 14 disconnects the line and ends the operation. To do.

  On the other hand, in step S85, since a call is possible, the communication management unit 14 notifies the call time guidance for notifying the maximum callable time (for example, 3 minutes) set in the call restriction setting information 15 (see FIG. 7). Play. Next, in step S86, the forcible disconnection time and the disconnection advance notice time are set from the pre-disconnect advance notice time set in the call restriction setting information 15 and the call is started.

  When the disconnection notice time is reached (step S88) in the state of the call (step S87), the communication management unit 14 reproduces the disconnection notice guidance (see FIG. 7) in step S89. When the call is continued and the forced disconnection time is reached (step S8a), the communication management unit 14 reproduces the call end time arrival guidance (see FIG. 7) and then disconnects the line and operates in step S8b. finish.

  In step S8d, since the call restriction function is invalid, the communication management unit 14 starts the call without restricting the call time (without forcible disconnection), and ends the call during the call (step S8e). When the line is disconnected, the operation is terminated.

  FIG. 9 is a flowchart showing the operation of the call restriction function for incoming calls from outside lines. This operation is started when a call connection request relating to an incoming call from an external telephone terminal is received. The overall flow of the operation is the same as the operation for the internal line transmission and the external line transmission described with reference to FIG. 8. Steps S91 to S9e in FIG. 9 correspond to steps S81 to S8e in FIG. The difference will be mainly described.

  In step S91, the communication management unit 14 (see FIG. 3) determines the value of the valid / invalid flag of the incoming line record registered in the call restriction setting information 15 (see FIG. 5) (in step S81, the extension -Determine the value of the valid / invalid flag of the record for outgoing calls. If the value of the valid / invalid flag is on as a result of the determination, the communication management unit 14 proceeds to step S92. If the value of the valid / invalid flag is off, the communication management unit 14 proceeds to step S9d.

  In step S92, the communication management unit 14 acquires a call destination telephone number from the received call connection request (in step S82, a caller telephone number is acquired). Next, in step S93, a value (for example, 5 minutes) of call disabling time is acquired from the call restriction setting information 15, and the destination telephone number from the current date and time before the call disabling time is set as the call destination (destination) In step S83, a call history with the caller telephone number as the caller is acquired. As a result, if the corresponding call history can be acquired (Yes in step S94), the process proceeds to step S9c. If the corresponding call history cannot be acquired (No in step S94), the process proceeds to step S95. Proceed.

  Step S9c is the same as step S8c, steps S95 to S9b are the same as steps S85 to S8b, and steps S9d to S9e are the same as steps S8d to S8e. To do.

  FIG. 10 is a flowchart showing the operation of the call restriction function for incoming calls. This operation is started for the extension terminal on the transmission destination (destination) side when a call connection request relating to an incoming call from the subordinate extension terminal is received. Since extension calls are not subject to call time restrictions or connection restrictions, in step S101, a call is started without performing a call restriction operation (without forced disconnection), and in a state where a call is in progress (step S102), When the call ends and the line is disconnected, the operation ends.

  As described above, in the first call restriction method, the call time per call is limited to a predetermined maximum callable time, and a predetermined call disable time is set after the call. As a result, it is possible to prevent harmful effects caused by long-time calls of some users and to provide users with a fair call service. In addition, since the frequency of call connection requests issued by each user can be lowered, the PBX device can be made difficult to fall into a congested state, and it can be easily resolved even if it falls into a congested state.

<Second call restriction method>
The first call restriction function described above is to fix the maximum callable time per call, but as a modified example, the second call restriction function makes the callable time variable according to the latest call situation of the user. A call restriction method will be described.

  In the second call restriction method, it is not possible to provide a uniform call disable time after a call, but to determine whether or not a call is possible according to the latest call status of each user, and to change the call possible time for each call. Take control. Here, the call history search time is a certain time width for searching for the presence or absence of the most recent call, the call time is the total call time retroactive from the end of the most recent call, and the total calls allowed during that time The maximum value of time is called the maximum accumulated callable time. If the call is not made within the call history search time, the call for the maximum accumulated call time is permitted. Further, when a call is made within the call history search time, if the total call time within the call history total time is smaller than the maximum accumulated call available time, the call is permitted with the difference as the call available time.

  FIG. 11 is an explanatory diagram illustrating a first operation example of the second call restriction method in which the callable time of each call is variable. In this example, it is assumed that both the call history search time and the call history total time are set to 5 minutes and the maximum accumulated call available time is set to 3 minutes. In each of FIGS. 11 to 14, a thick horizontal arrow indicates a call time, a thick horizontal broken line indicates a non-call time, a thick vertical arrow indicates a call connection request, and a cross indicates that the call connection request is not allowed. It represents that.

  In FIG. 11, it is assumed that neither Mr. A nor Mr. B made a call for at least 5 minutes before 15:00, and Mr. A first started the call at 15:00:00 by extension or outside line. At this time, since Mr. A has not made a call in the past 5 minutes within the call history search time, the available call time is set to 3 minutes. Therefore, voice guidance (call time guidance, not shown) is played to the effect that the call time is limited to 3 minutes at the start of the call. Assuming that the pre-disconnection notice time is set to 60 seconds, voice guidance that the call will soon be disconnected when the call time reaches 2 minutes (15:02) (disconnect notice, not shown) Flows. If the call is still ongoing, when the call time reaches 3 minutes (15: 3), a voice guidance indicating that the call end time has arrived (call end time has arrived, not shown) The call is forcibly disconnected.

  After that, Mr. A can make a call even if he / she makes an extension call or an outside call again from 15: 3 when the call is finished until the call history search time (5 minutes) elapses (before 15: 8). Is not allowed. In that case, Mr. A has been talking for the past 5 minutes within the call history search time, and the total call time within the call history total time (between 14:58 and 15: 3) is 3 minutes. The available time is 0 minute, and it is determined that the call is not possible. Therefore, the voice guidance (not possible to call, not shown) is played to the effect that the call should not be permitted and should be re-set after a while. Then, if Mr. A makes an extension call or an outside line call again at 15: 8, at this point in time, since the call has not been made in the past 5 minutes within the call history search time, the available call time is set to 3 minutes, The call can be made again for up to 3 minutes.

  On the other hand, if Mr. B starts a call due to an outside line incoming call at 15:00, voice guidance (call time guidance, not shown in the figure) that the call time is limited to 3 minutes starts. Here, it is assumed that Mr. B ends the call when the call time reaches 1 minute (before the disconnection notice flows). After that, it is assumed that Mr. B had another incoming call at 15:02. In this case, Mr. B has been talking for the past 5 minutes within the call history search time, and the total call time within the call history total time (between 14:56 and 15: 1) is 1 minute. The available time is 2 minutes, and it is determined that a call is possible. Therefore, if a voice guidance (call time guidance, not shown) is played that the call time is limited to 2 minutes at the start of the call, and the pre-disconnection notice time is set to 60 seconds, then at 15: 3 Voice guidance (disconnection notice, not shown) will be played to the effect that the call will be disconnected soon. If the call is still ongoing, the voice guidance (call end time arrived, not shown) that the call end time has arrived will flow at 15: 4 when the call time has reached 2 minutes, then the call will be forced Disconnected.

  After that, even if the outside line is received again from 15: 4 when the call is terminated until the call history search time (5 minutes) elapses (before 15: 9), the call is permitted. Not. In that case, Mr. B has been talking for the past 5 minutes within the call history search time, and the total call time within the call history total time (between 14:59 and 15: 4) is 3 minutes. The available time is 0 minute, and it is determined that the call is not possible. Therefore, the voice guidance (not possible to call, not shown) is played to the effect that the call should not be permitted and should be re-set after a while. Then, when an outside line is received again for Mr. B at 15: 9, since the call has not been made in the past 5 minutes within the call history search time at this time, the available call time is set to 3 minutes and 3 again. You can make calls up to minutes.

  FIG. 12 is an explanatory diagram illustrating a second operation example of the second call restriction method in which the callable time of each call is variable. Also in this example, it is assumed that both the call history search time and the call history total time are set to 5 minutes and the maximum accumulated call available time is set to 3 minutes.

  In FIG. 12, it is assumed that neither Mr. C nor Mr. D made a call for at least 5 minutes before 15:00, and Mr. C first started the call at 15:00:00 by extension or outside line. At this time, since Mr. C has not made a call in the past 5 minutes within the call history search time, the callable time is set to 3 minutes, and the voice guidance that the call time is limited to 3 minutes at the start of the call (call Time guidance (not shown) flows. Here, it is assumed that Mr. C ends the call when the call time reaches 1 minute (before the disconnection notice flows). After that, when Mr. C started the call again at 15: 2 by calling the extension or outside line, the available call time is set to 2 minutes, but when the call time reaches 1 minute again. It is assumed that the call is ended (before the disconnection notice flows).

  Subsequently, when Mr. C makes an internal line transmission or an external line transmission again at 15: 4, the available call time is set to 1 minute. Then, at the time when the call time reaches 1 minute (15:05), after a voice guidance indicating that the call end time has arrived (call end time has arrived, not shown), the call is forcibly disconnected. Note that, as in this example, when the available call time (1 minute) is equal to or shorter than the pre-disconnection notice time (60 seconds), the disconnection notice voice guidance is not played.

  After that, Mr. C will not be allowed to make a call even if he / she makes an extension call or an outside line call again from 15: 5 to 15:10 when the call is terminated. In that case, Mr. C has been in the call for the past 5 minutes within the call history search time, and the total call time within the call history total time (between 15:00 and 15: 5) is 3 minutes. The callable time is 0 minutes, and it is determined that the call is not possible. Therefore, the voice guidance (not shown) that does not allow a call flows without allowing the call. Then, when Mr. C makes an extension call or an outside line call again at 15:10, since the call has not been made in the past 5 minutes within the call history search time at this time, the available call time is set to 3 minutes, The call can be made again for up to 3 minutes.

  On the other hand, when Mr. D starts a call by receiving an outside line at 15:00, the callable time is set to 3 minutes as described above, and when the call time reaches 1 minute (rather than the disconnection notice flowing) It is assumed that the call has ended. After that, if an outside line is received again for Mr. D at 15: 3, the callable time is set to 2 minutes, but when the call time reaches 1 minute again ( It is assumed that the call has been terminated (before the disconnection notice flows).

  Subsequently, if an outside line is received again at 15: 5 to Mr. D, the available call time is set to 1 minute. Then, at the time when the call time reaches 1 minute (15: 6), after a voice guidance indicating that the call end time has arrived (call end time has arrived, not shown), the call is forcibly disconnected. Furthermore, when an outside line is received again for D from the end of the last call until the call history search time elapses (for example, 15: 9), the available call time is similarly set to 1 minute. When the call time reaches 1 minute, the call is forcibly disconnected.

<Third call restriction method>
Since the second call restriction function described above needs to retrieve the call history within the call history search time after searching the call history within the call history search time, there is a concern about the performance degradation of the PBX device. The Therefore, the third call restriction method was devised by simplifying the second call restriction method.

  This third call restriction method determines whether or not a call can be made according to the latest call situation of each user and performs control to make the call available time of each call variable. The method is the same. On the other hand, in the second call restriction method, the availability of a call is determined based on the presence / absence of a call history within the call history search time and the total call time within the call history total time that goes back from the last call end time. On the other hand, in the third call restriction method, the call is permitted with the difference as the callable time only when the total call time within the latest fixed time is smaller than the predetermined maximum cumulative callable time. did.

  FIG. 13 is an explanatory diagram illustrating a first operation example of the third call restriction method in which the callable time of each call is variable. In this example, it is assumed that a certain time for adding (cumulative) the latest call time is set to 8 minutes, and the maximum accumulated call available time is set to 3 minutes. In the following, description of the voice guidance is omitted.

  In FIG. 13, it is assumed that neither Mr. A nor Mr. B made a call for at least 8 minutes before 15:00, and Mr. A first started the call at 15:00:00 by extension or outside line. At this time, since the total call time for the past 8 minutes is 0 minutes, Mr. A is set to 3 minutes. After that, when the call time reaches 3 minutes (15: 3), the call is forcibly disconnected.

  After that, Mr. A will not be allowed to make a call if he / she makes an extension call or an outside line call again from 15: 3 to 15: 9 when the call is terminated. In this case, since the total call time for the latest fixed time (last 8 minutes) is 3 minutes, the available call time is 0 minutes, and it is determined that the call is impossible. And if Mr. A makes an internal or external call again at 15: 9, the total call time for the past 8 minutes (between 15: 1 and 15: 9) is 2 minutes at this point. The callable time is set to 1 minute, and a call up to 1 minute can be performed.

  On the other hand, if Mr. B starts a call by receiving an outside line at 15:00, the callable time is set to 3 minutes as in the case of Mr. A, and when the call time reaches 3 minutes (15: 3 Minutes), the call is forcibly disconnected. After that, even if an outside line is received again from 15: 3 to 15: 9 when the call is terminated, the call is not permitted as with Mr. A. And if there is another incoming call to Mr. B at 15:10, the total call time for the past 8 minutes (from 15: 2 to 15:10) is 1 minute at this point. The possible time is set to 2 minutes, and a call up to 2 minutes can be made.

  FIG. 14 is an explanatory diagram illustrating a second operation example of the third call restriction method in which the callable time of each call is variable. Also in this example, it is assumed that a fixed time for adding (cumulating) the latest call time is set to 8 minutes, and the maximum accumulated call available time is set to 3 minutes.

  In FIG. 14, it is assumed that neither Mr. C nor Mr. D made a call for at least 8 minutes before 15:00, and first, Mr. C started a call at 15:00:00 by extension or outside line. At this time, since the total call time for the past 8 minutes is 0 minutes, Mr. C is set to 3 minutes. Here, it is assumed that Mr. C has finished the call when the call time reaches 1 minute (15: 1). After that, when Mr. C started the call again at 15: 2 by calling the extension or outside line, the callable time was set to 2 minutes, and when the call time reached 2 minutes (15: 4) ) Is forcibly disconnected.

  After that, even if Mr. C makes another extension call or outside line call again from 15: 4 to 15: 8 when the call is terminated, the call is not allowed as in the case of Mr. A. If Mr. C makes an internal or external call again at 15: 9, the total call time for the past 8 minutes (between 15: 1 and 15: 9) is 2 minutes at this point. The available time is set to 1 minute, and a call up to 1 minute can be made.

  On the other hand, when Mr. D starts a call by receiving an outside line at 15:00, the callable time is set to 3 minutes as described above, and the call is terminated when the call time reaches 1 minute. . After that, if an outside line is received again at 15:02, the callable time is set to 2 minutes, but when the call time reaches 1 minute again, the call is made. Has been completed.

  Subsequently, if an outside line is received again at 15: 4 to Mr. D, the available call time is set to 1 minute. Then, when the call time reaches 1 minute (15: 5), the call is forcibly disconnected. Furthermore, when an outside line is received again for D from the end of the last call until the call history search time elapses (for example, 15: 9), the available call time is similarly set to 1 minute. When the call time reaches 1 minute, the call is forcibly disconnected.

  After that, even if an outside line is received again from 15: 5 to 15: 8 when the call is terminated to D, the call is not permitted as with Mr. A. And if there is another incoming call to Mr. D at 15: 9, the total call time for the past 8 minutes (from 15: 1 to 15: 9) is 2 minutes at this point. The available time is set to 1 minute, and a call up to 1 minute can be made.

  In applying the call restriction method according to the present invention described above, the operation may be appropriately adjusted according to the reliability level of the subscriber telephone number. FIG. 15 is a list of reliability levels of subscriber telephone numbers. For example, it is possible to exclude the application of the call restriction method to subscriber telephone numbers with reliability “5” and “4” and to apply the call restriction method only to subscriber telephone numbers with reliability “3” or lower. . Alternatively, the call restriction setting information may be individually set according to the reliability level.

  In the example of FIG. 15, five levels from “1” to “5” are provided as reliability levels of registered subscriber information. The reliability level “5” with the highest reliability is a telephone number registered by an IP-PBX administrator (such as a local government) and is highly public. For example, a telephone number of a fire department, police, government office, etc. The reliability level “4” is a telephone number registered by an IP-PBX administrator (such as a local government) after confirming the reliability. The reliability level “3” has little room for falsification, such as a telephone number automatically read from a SIM card or the like of a mobile phone terminal. The reliability level “2” indicates that the telephone number has been received and the uniqueness and validity of the telephone number has been confirmed. The reliability level “1” having the lowest reliability is a telephone number based solely on self-reporting by the user.

  Although the description of the embodiment of the present invention has been completed above, according to the present invention, depending on the degree of call concentration on the PBX system, the call time per call can be limited, or the call opportunity of each user. The call can be regulated so as to be even. As a result, even when there are call connection requests from a very large number of terminals, it is possible to reduce the occurrence of congestion and provide a fair call service between users. The embodiment of the present invention is not limited to the above-described embodiment, and it goes without saying that various modifications can be made without departing from the spirit of the present invention.

1 Mobile switching center (temporary PBX equipment)
2 Temporary LAN
3 Mobile phone terminal 4 General-purpose PC
5 Fixed telephone 6 Gateway 7 Mobile phone network 8 Public telephone network 9 IP network 11 IP-PBX server (PBX device)
12 management terminal 13 subscriber database 14 communication management unit (communication management means)
15 Call restriction setting information 16 Call history information 21 HUB
22 Wireless LAN base station (access point)

Claims (7)

Limiting the call time for one call between the extension telephone terminals accommodated in the PBX device and between the extension telephone terminal and the external telephone terminal, as well as extension transmission from each extension telephone terminal, external transmission, and A call restriction method for a PBX device that individually regulates a call by a call according to each call connection request type of an external line incoming call to each extension telephone terminal,
The PBX device is
For all calls made through itself, the call history including the caller phone number, the callee phone number, the call date and time, and the call time is stored in the storage unit,
For each call connection request type for which the call restriction function is enabled ,
At the start of a call for a call according to the call connection request type , a voice guidance for notifying a predetermined call available time is played, and a notice of disconnection of the line is made prior to the predetermined time before the call available time elapses after the call is started. After playing the voice guidance, when the call time reaches the call available time, the line is forcibly disconnected,
By referring to the call history, for each extension telephone terminal that has made a call by a call according to the call connection request type , until the predetermined call unavailable time elapses after the last call ends Call restriction of a PBX device, wherein a voice guidance notifying that a call is impossible to a caller user is reproduced without performing a call connection in response to a call connection request related to the next call connection request type Method. Limiting the call time for one call between the extension telephone terminals accommodated in the PBX device and between the extension telephone terminal and the external telephone terminal, as well as extension transmission from each extension telephone terminal, external transmission, and A call restriction method for a PBX device that individually regulates a call by a call according to each call connection request type of an external line incoming call to each extension telephone terminal,
The PBX device is
For all calls made through itself, the call history including the caller phone number, the callee phone number, the call date and time, and the call time is stored in the storage unit,
For each call connection request type for which the call restriction function is enabled ,
When a call connection request related to the call connection request type is received, each call in which a call according to the call connection request type is made for the extension telephone terminal within a predetermined time by referring to the call history If the total call time obtained by adding up the call time of the call is equal to or longer than the predetermined maximum call available time, it is indicated that the call cannot be made to the caller user without performing call connection in response to the call connection request. Play the voice guidance to notify,
When the total call time is less than the maximum callable time, a call connection is made in response to the call connection request, and a time obtained by subtracting the total call time from the maximum callable time at the start of the call is a callable time After playing the voice guidance to notify the disconnection and playing the voice guidance for announcing the disconnection of the line before the callable time elapses after the call is started, the call time has reached the callable time A call restriction method for a PBX device, characterized by forcibly disconnecting a line at a time. The PBX device call restriction method according to claim 1 or 2,
The PBX device accommodates a mobile phone terminal, a general-purpose PC, or a fixed telephone as an extension telephone terminal, and registers the subscriber as a mobile phone number or a subscriber telephone number that has been used in the past. A call restriction method for a PBX device, characterized by providing an extension call service and an outside line call service using a telephone number used from While limiting the call time for one call between the extension telephone terminals accommodated by itself and between the extension telephone terminal and the external telephone terminal, extension transmission from each extension telephone terminal, external transmission, and each extension A PBX device that individually regulates a call by a call according to each call connection request type of an incoming call to a telephone terminal,
A storage unit having call history information for storing a call history including a caller telephone number, a callee telephone number, a call date and time, and a call time for all calls made through the device;
For each call connection request type for which the call restriction function is enabled ,
At the start of a call for a call according to the call connection request type , a voice guidance for notifying a predetermined call available time is played, and a notice of disconnection of the line is made prior to the predetermined time before the call available time elapses after the call is started. After playing the voice guidance, when the call time reaches the call available time, the line is forcibly disconnected,
By referring to the call history, for each extension telephone terminal that has made a call by a call according to the call connection request type , until the predetermined call unavailable time elapses after the last call ends And a communication management means for playing back a voice guidance notifying the calling user that the call is not possible without performing a call connection in response to a call connection request relating to the next call connection request type. PBX device to do. While limiting the call time for one call between the extension telephone terminals accommodated by itself and between the extension telephone terminal and the external telephone terminal, extension transmission from each extension telephone terminal, external transmission, and each extension A PBX device that individually regulates a call by a call according to each call connection request type of an incoming call to a telephone terminal,
A storage unit having call history information for storing a call history including a caller telephone number, a callee telephone number, a call date and time, and a call time for all calls made through the device;
For each call connection request type for which the call restriction function is enabled ,
When a call connection request related to the call connection request type is received, each call in which a call according to the call connection request type is made for the extension telephone terminal within a predetermined time by referring to the call history If the total call time obtained by adding up the call time of the call is equal to or longer than the predetermined maximum call available time, it is indicated that the call cannot be made to the caller user without performing call connection in response to the call connection request. Play the voice guidance to notify,
When the total call time is less than the maximum callable time, a call connection is made in response to the call connection request, and a time obtained by subtracting the total call time from the maximum callable time at the start of the call is a callable time After playing the voice guidance to notify the disconnection and playing the voice guidance for announcing the disconnection of the line before the callable time elapses after the call is started, the call time has reached the callable time A PBX apparatus comprising: a communication management unit that forcibly disconnects a line at a time. The PBX device according to claim 4 or 5,
A mobile phone terminal, general-purpose PC, or fixed telephone is accommodated as an extension telephone terminal, and it has been used for a long time by registering a mobile phone number or a subscriber telephone number as an extension telephone number. A PBX device that provides an extension call service and an outside call service using a telephone number.   A PBX control program for causing a computer to function as the PBX device according to any one of claims 4 to 6.

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