JP3392515B2 - Switching communication system - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switching communication system which enables call transfer between a plurality of networks having different numbering plans. 2. Description of the Related Art In recent years, with the trend of decentralization of offices and offices in metropolitan areas, private branch exchanges (PBXs) have been installed at each office, and these have been connected, for example, via private leased lines. Communication systems that have been developed are being considered. In this type of system, each PBX accommodates a plurality of extensions and establishes a private communication network for each office. In each of these private communication networks, an extension number system of extensions is formed according to a unique numbering plan, and the PBX of each network provides a switching service only to the extensions accommodated in the network constructed by the own device. . [0003] As described above, conventionally, the exchange service is provided only for the extension closed to each private communication network. For this reason, for example, when a subscriber who used a specific extension telephone in a certain business office moves to another business office, this mobile user must receive an incoming call to the original extension telephone at the destination extension telephone. Could not. [0004] Therefore, an object of the present invention is to be able to receive a call transfer from a source by performing mobile registration from a destination network even when the mobile terminal moves between arbitrary networks having different numbering plans. A switching communication system is provided. It is another object of the present invention to determine whether or not a mobile registration request should be permitted when it is generated, thereby appropriately responding to system conditions and the position of a mobile registrant. It is an object of the present invention to provide a switching communication system which can perform the switching. SUMMARY OF THE INVENTION In order to achieve the above objects, the present invention provides first and second wired communication networks, each of which accommodates a plurality of subscribers and has a different numbering plan. Prepare these
In a switching communication system in which wired communication networks are connected via a communication line to enable communication between networks, the first wired communication
The signal network, movement of the movement registration request to detect when entered by the subscriber of the second wire communication network wishing to move to the home network from a first terminal connected to the home network Registration request detection means, and when the movement registration request detection means detects a movement registration request by a subscriber of the second wired communication network, the notification for requesting confirmation of permission or rejection of the movement registration request is sent to the second terminal. a first notifying means for delivering a second wired communication network, when a permission notice of a mobile registration request in response to the notification by the first notification means from the second wired communication network is returned, The first from the second wired communication network to the first
A second notification unit configured to generate information necessary for inter-network transfer to the wired communication network and to notify the second wired communication network of the information. On the other hand, wherein the second wired communication network, wherein the first organic
If a notification is sent from the line communication network to request confirmation of the permission of the move registration request, whether or not the move registration request should be permitted is determined based on data registered in advance in the registered system or the conditions of the move applicant. Return means for returning the result of the determination to the first wired communication network, and after returning a notice of permission for a mobile registration request by the return means, transfer between networks from the first wired communication network is performed. Storage means for storing information associated with the number of the second terminal used in the own network by the subscriber who has input the mobile registration request, when the information required for the mobile terminal is notified. When an incoming request for a subscriber accommodated in the network is issued, information relating to the incoming request is transferred to the first wired communication network based on information necessary for inter-network transfer read from the storage means. , Applicable subscription Is that a networks transfer control means for causing the <br/> Ru incoming call against the first terminal to be newly used. As a result, according to the present invention, in the second network, based on information necessary for inter-network transfer coming from the first network, for example, network identification information for specifying a transfer destination and a terminal Identification information is registered. In this state, if an incoming call is made to a subscriber whose mobile network has been registered in the second network, the second network does not perform incoming call control to the terminal used by this subscriber and performs the incoming call. Transfer control to one network is performed. Therefore, even if a subscriber who originally belongs to the second network moves to the first network having a different numbering plan from that of the second network, this subscriber performs a mobile registration from the first network to which the subscriber moves. By doing so, it is possible to receive an incoming call to the terminal used in the second network before the movement in the first network at the destination. According to another aspect of the present invention, a notification for requesting confirmation of a mobile registration request is first transmitted from the first network to the second network based on a mobile registration request input by a mobile applicant. Then, in the second network receiving the notification, it is determined whether or not the movement registration request should be permitted. Then, when the permission notification of the mobile registration request is returned to the first network from the second network in accordance with the determination result, the first network generates information necessary for inter-network transfer, and And the mobile registration is completed. in this way,
Each time a move registration request is issued, it is determined whether or not to permit the move registration request, and processing is performed. For example, when the number of move registrations exceeds the allowable number predetermined in the system, registration is performed. Appropriate measures can be taken in accordance with system conditions, the position of the mobile registrant, and the like, such as restrictions and registration restrictions for those who have not been previously permitted to perform mobile registration. An embodiment of the present invention will be described below. In this embodiment, a system in which two local communication networks A and B having different numbering plans are connected via a dedicated line will be described as an example. 1 and 2 are circuit block diagrams showing the configuration of a switching communication system according to one embodiment of the present invention. Reference numerals 10 and 20 denote private branch exchanges that construct a private communication network A and a private communication network B, respectively. I have. The private branch exchange 10 includes a time switch (TS) 11 and a time switch control circuit (TSC) 1.
2, a central control circuit (CC) 13, and a main storage circuit 14.
, Extension circuits LC1 to LCn, and local line circuits TRK1 to TRK
RKm and dedicated line circuits PVT1 to PVTl. The time switch control circuit 12 controls the switching of the time switch 11 in accordance with the instruction of the central control circuit 13, whereby the extension circuits LC1 to LCn, the local line circuits TRK1 to TRKm and the dedicated line circuits PVT1 to PKT1 are controlled. The PVTl and the extension circuits LC1 to LCn are selectively connected. The extension circuits LC1 to LCn are connected to extension telephones TEL1 to TELn via extensions L1 to Ln, respectively. The extension circuits LC1 to LCn perform various interface operations for the extension terminals TEL1 to TELn, such as detection of an outgoing signal and a dial signal and transmission of an incoming signal. The line circuits TRK1 to TRKm are:
The office lines OL1 to OLm are respectively connected to office lines OL1 to OLm, and these office lines OL1 to OLm are accommodated in a central office (not shown). The office line circuits TRK1 to TRKm perform interface operations for the office lines OL1 to OLm, such as capturing the office lines OL1 to OLm and transmitting and receiving various control signals. Furthermore, dedicated line circuit P
VT1 to PVTl are connected to dedicated lines PL1 to PLl, respectively, and the other ends of these dedicated lines PL1 to PLl are connected to the private branch exchange 20. Dedicated line circuit PVT
1 to PVTl perform an interface operation with respect to the dedicated lines PL1 to PL1 such as capturing of the dedicated lines PL1 to PL1 and transmission and reception of various control signals. The central control circuit 13 includes, for example, a microcomputer as a main control unit. In addition to ordinary control means such as exchange control for outgoing / incoming calls, a mobile registration notifying means 13a, transfer information generation / notification Means 13b. The mobile registration notifying means 13a is provided for the extension telephone T
In any of EL1 to TELn, when information indicating a request for mobile registration by a subscriber who has moved from private network B to private network A is input, control for requesting confirmation of the mobile registration request is performed. A signal is generated and the private network B
It is sent to. In the control signal, information indicating the extension number of the extension telephone used by the mobile subscriber in the private network B is inserted as the subscriber identifier of the mobile subscriber. The transfer information generating / notifying means 13b, when a mobile registration request permission notification is returned from the local communication network B after the mobile registration notification request request by the mobile registration notifying means 13a, is transmitted to the mobile subscriber. , A transfer destination extension number is assigned as a subscriber identifier in the private network A, and the assigned extension number and the network identification number (for example, “80”) assigned to the private network A are inserted in the transfer information. Is generated and transmitted to the private network B. On the other hand, the private branch exchange 20 includes a time switch (TS) 21 and a time switch control circuit (TSC) 2.
2, a central control circuit (CC) 23, and a main storage circuit (ME
M) 24, extension circuits LCC1 to LCCn, local line circuits TRKK1 to TRKKm, and dedicated line circuits PVTT1 to PVTT1
VTTl. Extension circuits LCC1 to LCCn
To the extension telephone TEL via the extensions L1 to Ln, respectively.
L1 to TELLn are connected. Also, the line circuit TR
Station lines OLL1 to OLL are provided for KK1 to TRKKm, respectively.
m and PL1 to PLl are connected to the dedicated line circuits PVTT1 to PVTTl, respectively. The extension circuits LCC1 to LCCn and the local line circuits TRKK1 to TRKK
m and the functions of the dedicated line circuits PVTT1 to PVTTl are the same as those of the private branch exchange 10 described above, and therefore detailed description is omitted. The main storage circuit 24 stores a transfer destination network identification number and a transfer destination extension number in the network in association with the extension numbers assigned to the extensions LL1 to LLn as shown in FIG. 24a. It should be noted that an extension for which transfer information is not registered in the table indicates a state in which transfer registration is not performed. The central control circuit 23 includes a return means 23a, a transfer setting means 23b, and a transfer control means 23c, in addition to the ordinary switching connection control means relating to outgoing / incoming calls. When a control signal for requesting confirmation of the mobile registration request arrives from the local communication network A, the return means 23a determines whether or not to permit the mobile registration request and returns the determination result to the local communication network A. Will be returned to The transfer setting means 23b is provided with the return means 23
a, the arrival of the transfer information from the private network B is monitored, and when the transfer information arrives, a predetermined storage area in the transfer information registration table 24a is determined based on the information. Is stored with the network identification number and extension number of the transfer destination. The transfer control means 23b includes the extensions LL1 to LL
n, it is determined based on the information stored in the main storage circuit 24 whether or not inter-network transfer is specified for the incoming extension. If it is determined that inter-network transfer is specified, After generating a dial signal according to the extension number of the transfer destination stored in the main storage circuit 24, the dial signal is transmitted to the private network A via a dedicated line. Next, the operation of the switching communication system configured as described above will be described. In the following description, the extension L
The extension number assigned to L1 is set to "3000", and the extension telephone user who has used extension telephone TELL1 in the private communication network B before the movement moves to the local communication network A after the movement.
The procedure for performing the mobile registration will be described. Now, in order for the extension telephone user to perform mobile registration, for example, after the off-hook of the extension telephone TELL1, the extension telephone TELL1 uses a special number for requesting mobile registration, followed by the network identification number of the network B and before moving. The above extension telephone TE
It is assumed that the extension number of LL1 has been input. Then, the input network identification number and extension number are detected by the extension circuit LC1 via the extension L1, and then supplied from the extension circuit LC1 to the central control circuit 13 via the control bus. As shown in FIG. 4A, the central control circuit 13 executes the extensions L1 to Ln in step 4a.
It monitors the mobile registration request coming from. When detecting that the extension telephone TEL1 has made a mobile registration request, the central control circuit 13 generates a control signal in which the extension number of the supplied extension telephone TELL1 is inserted, and converts the control signal into an empty dedicated line. To the local communication network B to notify the occurrence of a mobile registration request (step 4b). The central control circuit 23 of the private network B is shown in FIG.
As shown in (b), the notification of the occurrence of the mobile registration request from the private network A is monitored in step 5a. And
When the arrival of the control signal is detected, the central control circuit 23 determines whether or not a move registration request for the user of the extension telephone TELL1 is permitted in step 5b based on the extension number notified by the control signal. Is determined. This determination is made based on data (not shown) registered in advance. As a result, if it is determined that the movement registration request is permitted, the central control circuit 23 generates a notification signal in which information indicating "registration permission" is inserted in step 5c and sends it to the network A. I do. If it is determined that the move registration request is not permitted as a result of the determination in step 5b, the central control circuit 23 generates a notification signal in which information indicating "registration impossible" is inserted in step 5f. The packet is sent to the network A, and the process is terminated. The central control circuit 13 of the private network A is shown in FIG.
In step 4c of FIG. 7A, the arrival of a notification signal from the private network B is monitored. Then, when the arrival of such a signal is detected, it is determined in step 4d based on the information inserted in the notification signal whether or not a move registration request for the user of the extension telephone TELL1 has been permitted.
As a result of this determination, if the move registration request is permitted,
The central control circuit 13 assigns a specific extension number (for example, "6000") in the private communication network A to the mobile registrant (step 4e), and in step 4f, the assigned extension number "6000" and the private communication network. The transfer information in which the network identification number “80” of A is inserted is generated and transmitted to the private network B. If the result of determination in step 4d is that the transfer registration request is not permitted, the central control circuit 13 notifies the transfer registrant that registration is not possible, and ends the processing. On the other hand, the private network B is connected to step 5d in FIG.
Monitors the arrival of transfer information sent from the private network A. When detecting such arrival of the transfer information, the central control circuit 23 notifies the transfer information registration table 24a of the arrival of the transfer information to the storage area corresponding to the extension number "3000" of the extension telephone TELL1 by the control signal in step 5e. Control for storing the stored network identification number "80" and extension number "6000". Thereafter, the central control circuits 13 and 23 repeat the above-described series of processing each time a mobile registration request is input to the extension telephones TEL1 to TELn in the private network A. Next, a description will be given of a procedure of an incoming call process for a mobile user who has been registered as described above.
Now, for example, at the extension telephone TELL2 of the private network B, after the telephone is off-hook by the speaker, the extension terminal TEL
Suppose that the extension number "3000" has been dialed in to call L1. Then, the dial signal is output to the extension LL.
2, the information indicating the extension number "3000" is supplied from the extension circuit LCC2 to the central control circuit 23 via the control bus. When the central control circuit 23 detects a call to the extension telephone TELL1 in step 7a of FIG.
At b, it is determined whether inter-network transfer is specified for the extension telephone TELL1. This determination is made by the main storage circuit 24
Is performed based on the registered contents of the transfer information registration table 24a stored in the. As a result, the extension number "6000" of the transfer destination is registered in the storage area corresponding to the extension number "3000" in the transfer information registration table 24a, and the inter-network transfer is designated for the extension telephone TELL1. If it is determined, the central control circuit 23 reads out the network identification number of the transfer destination and the extension number of the transfer destination based on the registered contents of the transfer information registration table 24a in step 7c, and reads this in step 7d. A dial signal corresponding to the extension number, ie, “6000”, is generated and transmitted to the private network A via an empty dedicated line, for example, PL1. If it is determined in step 7b that inter-network transfer has not been specified for the extension telephone TELL1, the central control circuit 23 performs ordinary incoming call control for calling the extension telephone TELL1. Do. Now, the private line circuit PVT1 of the private network A
When the dial signal coming from the network B is detected, the detected signal is sent to the central control circuit 13 via the control bus.
Sent to The central control circuit 13 monitors the arrival of the dial signal in step 6a of FIG. And
When a dial signal from the dedicated line circuit PVT1 is detected,
The central control circuit 13 determines in step 6b that the extension number is "600".
An instruction to send an incoming signal is issued to the extension circuit connected to the extension "0", and the received extension signal is sent from the extension circuit to the extension telephone at the connection destination to start the incoming call. When a response is made to the call, the central control circuit 13 connects the extension which has responded and the call originator in step 6c to establish a call state. Then, in response to a mobile registration request input from any extension telephone, the private network A first generates a control signal in which the extension number of the extension telephone serving as a transfer source is inserted, and sends the control signal to the private communication network B. The mobile communication network B, which has been sent to the local network and received the notification of the mobile registration by this control signal, determines whether or not the mobile registration request is permitted, and the mobile registration request is permitted based on the determination result. If In the local communication network B, a notification of permission for a mobile registration request is returned to the local communication network A. In the local communication network A receiving the permission notification, the network identification number assigned to the local communication network A and the network The transfer information in which the extension number of the transfer destination is inserted is generated and sent out to the private communication network B. In the private communication network B, the transfer information is designated as the transfer source based on the received transfer information. The network identification number and the extension number of the transfer destination are stored in association with the extension number of the extension telephone set, and if there is an incoming call to the extension telephone set for inter-network transfer in the private network B, The incoming call control for this extension telephone is not performed.
The transfer control to the extension telephone in the private network A is performed. Therefore, when the extension telephone user who originally belongs to the private network B moves to the private communication network A having a different numbering plan from that of the private communication network B, this user is transferred to the private communication network of the destination. By performing the mobile registration using the extension telephone set A, the incoming call to the extension telephone set used in the local communication network B before the movement can be received by the destination extension telephone set. Further, as described above, every time a move registration request is issued, it is determined whether or not to permit the move registration request, and the processing is performed. For example, the number of move registrations is predetermined by the system. It is possible to appropriately cope with registration restrictions when the number exceeds a certain allowable number, or registration restrictions for persons who are not permitted to move in advance in advance, according to system conditions, the position of a person who wants to move, and the like. The present invention is not limited to the above embodiment. For example, in the above-described embodiment, a system in which private communication networks having different number plans are connected to each other via a communication line has been described as an example. However, this is a system in which a plurality of public line networks having different number plans are connected to each other. It is also possible to apply to. In the above embodiment, the two private networks A
And B are connected via a dedicated line as an example. However, the present invention can be applied to a system in which a large number of private communication networks are connected to each other, or via a public network instead of a dedicated line. It is also possible to configure as a connected system. Further, in the above embodiment, for convenience of explanation,
Although the functions of the central control circuits 13 and 23 are divided and displayed, they may have both control functions.
In addition, various modifications can be made without departing from the scope of the present invention. As described in detail above, according to the present invention, based on information necessary for inter-network transfer coming from the first network,
In the second network, for example, network identification information and terminal identification information for specifying a transfer destination are registered. In this state, when an incoming call to a subscriber whose mobile network has been registered in the second network occurs, In the second network, incoming call control to the terminal used by the subscriber is not performed, but transfer control to the first network is performed. Therefore, even if a subscriber who originally belongs to the second network moves to the first network having a different numbering plan from that of the second network, the subscriber moves from the first network to which the subscriber moves. By performing the registration, it is possible to receive the incoming call to the terminal used in the second network before the movement in the first network at the destination. [0039] According to the present invention, based on the mobile registration request supplied by the mobile seekers notification for requesting confirmation of the first movement registration request from a first wired communication network and a second wired communication network It is sent to a second chromatic receiving this notification
In the line communication network, whether or not the mobile registration request should be permitted is determined based on the conditions of the system or the person who wants to move, and the determination result is notified to the first wired communication network. 1st wire
The network is notified information necessary for networks transfer is generated when requesting mobile registration by the notified determination result has been granted to the second wired communication network, a second wired communication network this The notified information is stored in association with the move applicant, and the move registration is completed. As described above, every time a mobile registration request is issued, it is determined whether or not to permit the mobile registration request, and the processing is performed. Can respond appropriately.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a configuration of a private communication network A of a communication system according to one embodiment of the present invention. FIG. 2 is a block diagram showing the configuration of a private communication network B of the communication system according to one embodiment of the present invention. FIG. 3 is a view showing a transfer information registration table in a main storage circuit 24; FIG. 4 is a flowchart showing control procedures and control contents of central control circuits 15 and 25; FIG. 5 is a flowchart showing control procedures and control contents of central control circuits 15 and 25; [Description of Signs] 10, 20 private branch exchanges 11, 21 time switch (TS) 12, 22 time switch control circuit (TSC) 13, 23 central control circuit (CC) 14, 24 main storage circuit (MEM) TEL1 to TELn, TELL to TELLn ... extension telephones L1 to Ln, LL1 to LLn ... extension OL1 to OLm, OLL1 to OLLm ... office lines PL1 to PL1, PLL1 to PLLl ... dedicated lines LC1 to LCn, LCC1 to LCCn ... extension circuits TRK1 to TRKm, TRKK1 to TRKKm... Local line circuits PVT1 to PVT1, PVTT1 to PVTTl.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H04M 3/42-3/58

Claims (1)

(57) provided with Patent Claims 1 first and second wired communication network each plurality of subscribers are accommodated numbering plan is different, these organic
In a switching communication system in which line communication networks are connected via a communication line to enable inter-network communication, the first wired communication network moves from a first terminal connected to the own network to the own network. and moving the registration request detecting means for detecting this when the mobile registration request by the subscriber of the second wired communication network is input to the desired, the second wired communication network by the mobile registration request detecting means When a mobile registration request by the subscriber is detected, first notification means for sending a notification for requesting confirmation of permission or rejection of the mobile registration request to the second wired communication network; Yes notification means in response to by the notification of the second
When the permission notification of the mobile registration request is returned from the line communication network, information necessary for inter-network transfer from the second wire communication network to the first wire communication network is generated to generate the second wire communication. A second notifying unit for notifying a network, wherein the second wire communication network receives a notification for requesting confirmation of permission or rejection of a mobile registration request from the first wire communication network. Determining whether or not the transfer registration request is to be permitted based on data registered in advance or in a system or conditions representing a transfer applicant, and returning the determination result to the first wired communication network. Returning information for permitting the transfer registration request by the return means, and when information necessary for inter-network transfer is notified from the first wired communication network, the information is input to the transfer registration request. the first was performed subscriber was using in the home network End of
Storage means for storing in association with the last number , based on information necessary for inter-network transfer read from the storage means when an incoming call request is issued to a subscriber accommodated in the own network. The information relating to the incoming call request is stored in the first
Transferred to a wired communication network, the relevant subscriber to use a new
And an inter-network transfer control means for making an incoming call to the first terminal .