JPH08265811A - Private branch of exchange - Google Patents

Abstract

PURPOSE: To provide the private branch exchange connecting an external line terminal to an extension terminal even without designation of extension terminals and not needing the job of registering a telephone number of the extension terminal to be connected to the external line terminal. CONSTITUTION: A caller trunk line number storage section 44 and a corresponding extension number storage section 46 store extension numbers of extension telephone sets 20, 22, 24 to be connected to external telephone sets 14, 16 in cross reference with caller numbers of the external telephone sets 14, 16. A control section 38 receives an incoming request of the external telephone sets 14, 16 from an ISDN line network 12 and the caller trunk line numbers of the external telephone sets 14, 16 included in an incoming call request are detected and when an extension number corresponding to the detected caller trunk line number is stored in the storage section 46, the extension telephone sets 20, 22, 24 of the stored extension number are connected according to the incoming call request. When the extension number is not stored, the control section 38 decides the extension number in cross reference with the caller trunk line number and the decided extension number is registered in the storage section 46 in cross reference with the detected caller trunk line number.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a private branch exchange having a function of connecting to a predetermined extension terminal based on a telephone number of the outside line terminal in response to an incoming call request from the outside line terminal. Regarding the registration and modification of extension numbers required when you do.

[0002]

2. Description of the Related Art When an extension terminal accommodated in a private branch exchange is called from an outside line terminal, the outside line terminal directly dials to connect the outside line and the extension terminal without the operator of the private branch exchange. There is a private branch exchange that has a dial-in function that enables

One of the dial-in systems is the direct-in dial system. In this system, since a small number of office lines of the private branch exchange are shared by many extension terminals, the use efficiency of the office lines is high. In this system, the user of the outside line terminal dials a predetermined dial-in number (for example, 03-9876-5432) from the outside line terminal, and the private branch exchange that accepts this number through the ISDN line network sends a response tone to the outside line. Emitted to the terminal user. After confirming the answer tone, the user of the outside line terminal dials the desired extension number (for example, 1234). As described above, the direct-in-dial method has a problem that the number of digits to be dialed is large.

As a conventional technique capable of reducing the number of digits to be dialed, there is one disclosed in Japanese Patent Laid-Open No. 2-58463. In this technology, a table is registered in the private branch exchange connected to the ISDN line network, in which the telephone number of the outside line terminal and the telephone number of the extension line terminal to which the user of this outside line terminal wants to make a call correspond. There is. When an incoming call request is made from an external line terminal registered in the table, the telephone number of the external line terminal is sent from the ISDN network, so the private branch exchange can use this table from the telephone number of the external line terminal to The telephone number of the extension terminal to be connected can be known. Therefore, the user of the outside line terminal registered in the table does not need to dial the extension number.

[0005]

However, in the case of this prior art, if the telephone number of the outside line terminal is not registered in the table, the outside line terminal cannot be automatically connected to the extension line terminal. When an incoming call request is received from an external line terminal that is not registered in the table, the private branch exchange connects the external line terminal to a predetermined internal line terminal such as a reception desk, or a response tone is sent by the user like a normal direct in dial method. To ask the user to dial the extension's phone number. Further, the work of registering the telephone number of the outside line terminal and the telephone number of the corresponding extension line terminal in the above table must be appropriately performed on the side of the extension line terminal.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above drawbacks of the prior art and to provide a private branch exchange which does not require the work of registering the telephone number of an extension terminal to be connected to the outside line terminal when receiving an incoming call from an outside line. And

[0007]

In order to solve the above-mentioned problems, the present invention provides an extension terminal which accommodates an extension terminal and is connected to an ISDN line network, and which is issued by an outside line terminal accommodated in this ISDN line network. In a private branch exchange that accepts an incoming call request, this private branch exchange can store the extension number information of the extension terminal that should be connected to the external line terminal that issued the incoming call request in association with the caller number information of this external line terminal. Receiving destination information storing means, a calling party number detecting means for detecting calling party number information of an outside line terminal included in the receiving request when the incoming call request is received from the ISDN line network, and the calling party number detecting means. Determining means for determining whether or not the extension number information corresponding to the calling party number information detected by the receiver is stored in the destination information storage means, and as a result of the determination by the determining means, the extension number information is the destination. When it is determined that the information is stored in the information storage means, in response to an incoming call request, an incoming call control means for making an incoming call to an extension terminal according to the stored extension number information, and a result of the determination by the determination means, extension number information When it is determined that is not stored in the destination information storage means, the number determining means for determining the extension number information associated with the detected calling number information and the determined extension number information are detected. It has a registration means for registering in the destination information storage means in association with the calling party number information.

[0008]

According to the present invention, the called party information storage means stores the extension number information of the extension terminal to be connected to the outside line terminal which has issued the incoming call request in association with the calling party number information of the outside line terminal. Upon receipt of the incoming call request from the ISDN line network, the calling party number detecting means detects the calling party number information of the outside line terminal included in the incoming call request. The determining means determines whether or not the extension number information corresponding to the calling party number information detected by the calling party number detecting means is stored in the called party information storage means. When the result of the determination made by the determination means is that the extension number information is stored in the destination information storage means, the incoming call control means responds to the incoming call request and follows the extension number information stored in accordance with the stored extension number information. Make a call to the terminal. The number determining means determines the extension number information associated with the detected caller number information when it is determined that the extension number information is not stored in the destination information storage means as a result of the determination by the determining means. The registration means registers the determined extension number information in the destination information storage means in association with the detected caller number information.

In this way, it is possible to create a table in which the external line terminals and the internal line terminals are associated with each other even if the operator or the like does not perform the registration work.

[0010]

Embodiments of the private branch exchange according to the present invention will now be described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram of a private branch exchange according to an embodiment of the present invention. The private branch exchange 10 shown in FIG.
Outgoing line telephones 14 and 16 stored in the DN line network 12
When an incoming call is requested from the destination extension phone 20, 22, or 24 from the destination, the telephone number of the external telephone (hereinafter referred to as the "calling office line number") and the call setup message from this external telephone For external telephones that are registered in association with the telephone number of the internal telephone to which (SETUP) should be sent (hereinafter referred to as "extension number"), the registered internal telephone extension is registered according to the incoming call request from this external telephone. Let the phone receive the call. From the outside line telephone, it is only necessary to dial the office line number in this manner, and it is not necessary to dial the extension number. Hereinafter, this registration will be referred to as outside line registration. For an incoming call request from an outside line telephone that has not been registered for outside line, all extension lines 20, 22, 24
Is displayed on the display section of and the call is made to all of the extension telephones 20, 22, and 24. Then, the extension number of the extension telephone that has responded is automatically registered with the calling station line number of the extension telephone. Outside line telephone 1
When an extension number is dialed from 4 and 16 subsequently to the dial-in number, the private branch exchange 10 connects according to the registered extension number without considering the extension number designated by the dial.

The private branch exchange 10 includes ISDN trunk circuits 26, 28 and extension trunk circuits 30, 32, 34 as interface (IF) units.
Have and. ISDN trunk circuits 26, 28 are ISDN lines 100, 10
It is connected to the ISDN network 12 via 2. ISDN line network 12
Outside line telephones 14 and 16 are housed in. Other external line terminals such as a facsimile may be connected instead of the external line telephone.

The outside line telephones 14 and 16 are provided with a basic interface (BRI: Basic) defined as an ISDN interface.
(Rate Interface),
A call setup message including a dial-in number and a calling party office line number is sent to the private branch exchange 10 via the ISDN line network 12 and the ISDN lines 100 and 102. An external view of the outside line telephones 14 and 16 is shown in FIG. As shown in FIG. 2, the outside line telephones 14 and 16 include a handset 70 and a push button (PB) dial type dial button for dialing a called party line number or extension number.
72, a hold button 74 for transferring the incoming call, and a caller station line number notification button 76 for the caller to specify whether to send the caller station line number to the extension telephones 20, 22, 24. And a PB button 80 used when transmitting a PB signal sound to the call path after the call path is set, and a display unit 78 for displaying various information.

The caller station line number notification button 76 is a service for displaying the caller station line number on the display portion of the extension telephones 20, 22, 24 (calling number display service). The calling party's line number must be
It is for the caller to specify whether to send to.
The hold button 74 is used to transfer the incoming call when the outside line telephones 14 and 16 receive the incoming call. The display unit 78 displays the destination line number (dial-in number) dialed by the user and the elapsed time after the start of the call.

The PB button 80 of the outside line terminals 14 and 16 is a button for transmitting a PB signal by pressing the dial button 72 on the called side. The PB signal is used to respond to the inquiry with the PB signal when the private branch exchange 10 makes an inquiry about whether or not the outside line can be registered, which will be described later. This button 80 is a lightable button that has a light-emitter built-in. If you press the dial button 72 while the button 80 is lit, the PB signal corresponding to the pressed dial button 72 is sent to the communication path and lights up. If not, the PB signal is not transmitted even if the dial button 72 is pressed. When the button 80 is pressed when it is lit, it is in a non-lighting state, and when the button 80 is pressed when it is not lit, it is in a lighting state.

The dial button 72 described above is also used for outside line registration, which will be described in detail later. That is, the outside line telephone
When an incoming call request is sent from the private branch exchange 10 to the private branch exchange 10, the private branch exchange 10 inquires whether or not to register the external line if the external line telephones 14 and 16 have not been registered. , 16 using voice. The dial buttons 72 are then used by the users of the external telephones 14, 16 to answer the inquiry. To register an outside line, press the PB button 80 to turn on the PB button 80, and then the user presses the dial button 72 of "1" (hereinafter referred to as "outline registration possible"),
If you do not want to register the outside line, press the PB button 80 to turn on the PB button 80, and then press the dial button 72 of "0" (hereinafter referred to as "outside line registration failure") to open the private branch exchange.
Respond to 10. This response is sent to the private branch exchange 10 by the ISDN line 100,
Sent via 102. Private branch exchange 10 side to outside line terminal 1
4 and 16 are inquired as to whether or not to perform outside line registration. Some users of outside line telephones 14 and 16 desire to connect to different extension telephones one after another, such as a salesman. This is because the case where there is a person is considered.

The caller station line number notification button 76 of the outside line terminals 14 and 16 is a button for the caller to specify whether or not to notify the called side of the caller station line number. This button 76
Is a lightable button with a built-in light emitter.If the called side is called while it is lit, the called party's station line number is notified to the called side. When called, the calling party's office line number is not notified to the called party. When the button 76 is pressed when it is lit, it becomes unlit, and when it is not lit, the button 76
Press to turn on the light. When lit, the call setup message sent from the outside line telephones 14 and 16 to the private branch exchange 10 via the ISDN line network 12 at the time of call setup includes the caller station line number. If it is not lit, the calling number display service is not performed, and the calling party number included in the call setup message is deleted by the ISDN line network 12 and sent to the private branch exchange 10. Information on whether to provide the calling number display service is included in the call setup message, and the ISDN from the outside line terminals 14 and 16 is included.
It is sent to the network 12. Specifically, when the value of the display identifier provided in the calling number information element including the calling party line number, which is one of the information elements included in the call setup message, is "0", the calling number If the display identifier value is "1", the display is not performed.

Returning to FIG. 1, ISDN trunk circuits 26 and 28
When the outside line telephones 14 and 16 dial the dial-in number assigned to the private branch exchange 10, the outside line telephone 1
The call setup message issued by the caller 4 or 16 is accepted through the ISDN line network 12 and the ISDN lines 100 and 102. The call setup message received by the ISDN trunk circuits 26 and 28 includes the calling station line number only when the calling station line number notification button 76 of the outside line telephones 14 and 16 is lit. The ISDN trunk circuits 26 and 28 send the accepted call setup message to the control unit 38.

The private branch exchange 10 has an exchange processing unit 36 in addition to the control unit 38 for receiving the above call setup message, the ISDN trunk circuits 26, 28, and the extension trunk circuits 30, 32, 34.
The exchange processing unit 36 connects the ISDN trunk circuits 26, 28 and the extension trunk circuits 30, 32, 34 to each other to connect the external telephone 1
Set up a call path between 4 and 16 and extension telephones 20, 22 and 24. The extension trunk circuits 30, 32, 34 in the exchange processing unit 36
Connection between extension phones 20, 22, and 24 via ISDN trunk circuits 26, 28 and extension trunk circuits 30, 32, and 34 and extension phones 14, 16 Department
Controlled by 38.

The private branch exchange 10 further includes a called number registration control unit 40 for controlling registration of extension numbers of the extension telephones 20, 22, 24 which are destinations of incoming requests, and correction of registered extension numbers. The destination number correction control unit 42 to be controlled, the calling station line number storage unit 44 storing the calling station line number, and the calling station line number stored in the storage unit 44 A corresponding extension number storage unit 46 that stores the extension number of the extension telephone set connected to the outside line telephone set is controlled by the control unit 38. The extension number stored in the corresponding extension number storage unit 46 is stored in association with the calling station line number as described later.

A control unit 38, a destination number registration control unit 40,
The destination number correction control unit 42 is realized by a CPU (central processing unit, not shown) and a storage unit (not shown) that stores a control program and data used when the CPU performs processing. The storage unit includes a semiconductor memory and a hard disk. The caller station line number storage unit 44 and the corresponding extension number storage unit 46 are semiconductor memories such as DRAM and SRAM.

The details of each of the above parts will be described. Note that description of portions that are not directly related to the present invention will be omitted. The ISDN trunk circuits 26 and 28 that accept call setup messages from the external telephones 14 and 16 process the basic interface (BRI) and the primary rate interface (PRI) defined as ISDN interfaces. be able to. The accepted call setting message is sent to the control unit 38.

The control unit 38 accepts the call setting message via the ISDN trunk circuits 26 and 28 when the external telephones 14 and 16 issue the call setting message, and the corresponding extension number storage unit 46 stores the external telephone 14 and Extension phones 20, 22, for 16
Check whether 24 is registered, if it is registered, connect to the registered extension telephones 20, 22, 24, if not, determine the extension number to be registered, and call destination number This is a device that controls the registration control unit 40 to perform registration. If the registration has already been performed, the control unit 38 further determines whether or not it is necessary to correct the extension numbers of the extension telephones 20, 22, and 24 registered when the disconnection request is made, and the correction is performed. When it is determined that the registration is necessary, it has a function of controlling the called number correction control unit 42 to correct the registration.

When the call setting message is received, the control unit 38 detects the caller station line numbers of the outside line telephones 14 and 16 included in the call setting message. Next, it is checked whether or not the detected calling station line number is stored in the calling station line number storage unit 44. When the calling station line number is stored in the calling station line number storage unit 44, the extension number corresponding to the calling station line number is stored in the corresponding extension number storage unit 46. Then, the storage address of the extension number in the corresponding extension number storage unit 46 is stored in the calling station line number storage unit 44 in association with the calling station line number. The control unit 38 obtains the storage address of the extension number in the corresponding extension number storage unit 46 from the calling station extension number storage unit 44, and then obtains the extension number from the corresponding extension number storage unit 46. Details of the contents stored in the caller station line number storage unit 44 and the corresponding extension number storage unit 46 will be described later in the description of the caller station line number storage unit 44 and the corresponding extension number storage unit 46. The control unit 38 sends the call setup message to the extension trunk circuits 30, 32, 32, according to the obtained extension number.
It transmits to the extension terminals 20, 22, and 24 via 34.

If the detected calling station line number is not stored in the calling station line number storage unit 44, the control unit 38 calls all extension telephones 20, 22, 24, The extension numbers of the extension telephones 20, 22, 24 that have responded are determined as the extension numbers corresponding to the calling station line number. Then, the destination number registration control unit 40 is controlled so that the caller station line number and the address indicating the location where the extension number is stored in the corresponding extension number storage unit 46 are stored. Register to 44. Then, the control unit 38 controls the outside line telephone via the ISDN lines 100 and 102.
For the extension telephones 20, 22, and 24 that use the voice path set up between the local exchanges 14 and 16 and the private branch exchange 10 to make voice calls to the users of the external telephones 14 and 16 in response to the incoming call request. Check whether to receive the call automatically from the next time (whether to register the outside line). The caller responds with dial button 72. The control unit 38 determines whether to automatically receive an incoming call from the next time according to the response from the user. When it is determined that the incoming call is not automatically made, the control unit 38 controls the called number registration control unit 40 to store the corresponding extension number registration table 60 in the corresponding extension number storage unit 46, which will be described later.
"0" is registered in the outside line registration flag 63 located at. When it is determined that the incoming call is automatically received, the control unit 38 controls the called number registration control unit 40 to set the external line registration flag 63 in the corresponding extension number registration table 60 in the corresponding extension number storage unit 46 to "1. Is registered, and the corresponding extension number is also registered.

The caller station line number is the outside line telephone 14, 16
If not sent from all extension phones 20, 22,
Extension phone 2 that called 24 and received a response
The exchange processing unit 36 is controlled so as to generate a speech path between the 0, 22, 24 and the outside line telephones 14, 16. If the caller station line number is not sent from the outside line telephones 14 and 16, the caller station line number and the extension number cannot be associated, so the extension number that responded can be registered. It does not modify the registered extension numbers described below.

When the extension number corresponding to the detected caller station line number is stored before the incoming call request is received, or as described above, the control unit 38 newly sets the destination number registration control unit 40. When registered, the extension terminals 20, 22, 24 of the registered extension number are made to receive an incoming call. After the incoming call is generated and the call path is generated, the call transfer request is issued from the extension telephones 20, 22, and 24 to which the outside telephones 14 and 16 are connected.
If there is a call, or if the extension telephone that is trying to receive the call is to perform absent call transfer, busy transfer, delayed transfer when answering, or specific call transfer, which will be described later, the control unit 38 controls the external telephone 1
Connect 4 and 16 to other extension phones 20, 22 and 24. Control unit 38
At that time, the extension number of the call transfer destination is stored in a storage unit (not shown) in the control unit 38. As a result of the call transfer, the extension numbers of the extension telephones 20, 22 and 24 connected to the extension telephones 14 and 16 at the time when the call disconnection request is made (hereinafter referred to as "extension number at disconnection request") , Corresponding extension number storage
The extension number stored in 46 may be different.
Immediately after disconnecting the communication path, the control unit 38 compares the extension number at the time of the disconnection request stored in the storage unit in the control unit 38 with the extension number stored in the corresponding extension number storage unit 46, Determine if the extension numbers are different. If different, control unit 38
Sends the caller station line number and the extension number at the time of a disconnection request to the called number correction control unit 42, and the extension number at the time of a disconnection request corresponds to the caller station line number to the called number correction control unit 42. It is attached and registered in the corresponding extension number storage unit 46.

At this time, the extension number at the time of the disconnection request may be registered regardless of whether or not the extension numbers are different. In addition, the call transfer request is sent to the extension telephones 20, 22, and 24.
It is also possible to record whether or not there is a call, and to register the extension number at the time of the disconnection request, regardless of whether or not the extension numbers are different, when there is a call transfer request.

As a method of transferring a call, various call transfer methods that have been conventionally used can be adopted in the present invention. That is, any of automatic transfer, absence transfer, busy transfer, response delay transfer, and specific call transfer may be used. Here, the automatic transfer is a transfer of an external telephone by dialing the extension number of the transfer destination extension telephone after the user of the extension telephone presses the hold button during a call between the extension telephone and the external telephone. Is. Call forwarding is to register the extension number of the extension telephone to which the extension telephone should be transferred when the user of the extension telephone is absent, etc., in advance in the private branch exchange, and the private branch exchange is set to the registered extension number. It connects an extension telephone and an outside telephone. The busy transfer is a call to a predetermined extension telephone set registered in the private branch exchange when the extension telephone set to receive the call is busy. What is delayed response transfer?
When the extension telephone that has called to make an incoming call does not respond easily, the predetermined extension telephone set registered in the private branch exchange makes an incoming call when a predetermined time elapses. Specified call transfer is whether the call transfer is performed according to the caller station line number, registered for each extension telephone, and whether the call transfer is performed based on the registered caller station line number. The private branch exchange determines whether
Only when it is determined that the call is transferred, the call is received.

The caller's station line number storage unit 44 and the corresponding extension number storage unit 46 of the private branch exchange 10 include a destination number registration control unit.
The calling station line number registered by 40 and the extension number corresponding to this number (hereinafter referred to as "corresponding extension number") are stored. In order to store the calling party station line number and the corresponding extension number in the calling party station line number storage unit 44 and the corresponding extension number storage unit 46, the called party number registration control section 40 and the called party number correction control section 42 are used. In addition to the method according to the present invention, the extension number is registered by directly dialing the caller station line number and the corresponding extension number from the extension telephones 20, 22, and 24 by using the special number assigned for performing the extension line registration. There is also a way to do it. The latter method is performed by the operator of the private branch exchange 10 or the like.

The calling party number registration table 50 and the corresponding extension number storing section 46 stored in the calling station line number storing section 44.
FIG. 3 shows an example of the configuration of the corresponding extension number registration table 60 stored in FIG. The calling party number registration table 50 is a table that links the calling party station line number and the address in the corresponding extension number storage unit 46 in which the corresponding extension number corresponding to this number is stored. The calling number registration table 50 is
Number of registered caller station line numbers (caller number registration number: n) 51, caller station line numbers 52-1 to 52-n, and extensions corresponding to caller station line numbers Corresponding extension number storage section internal addresses 53-1 to 53-n, which are addresses in the corresponding extension number storage section 46 in which numbers are stored. Caller station line numbers 52-1 to 52-n and corresponding extension number storage unit addresses 53-1 to
53-n correspond to each other in pairs, and there are 51 pairs of registered calling number.

It should be noted that a plurality of corresponding extension numbers or numbers designating a group (a department, a section, a group of executives, etc.) are stored for one external telephone, and one corresponding extension number is stored. When the extension telephone is busy, the incoming call request may be transmitted to the extension telephone having another corresponding extension number. Furthermore, the order of transmission may be specified.

The corresponding extension number registration table 60 is a table in which the corresponding extension numbers are stored. The corresponding extension number registration table 60 includes the number of registered corresponding extension numbers (corresponding extension number registration number: n) 61 and corresponding extension numbers 62-1 to 62-1.
62-n and outside line registration flags 63-1 to 63 indicating whether or not outside line registration is possible
It consists of -n and. The value recorded in the outside line registration flag 63 corresponds to whether or not the outside line can be registered by using the dial buttons 72 from the outside line telephones 14 and 16 as described above. It is "0" when the outside line is not registered.

The determination of the corresponding extension number using the calling party number registration table 50 and the corresponding extension number registration table 60 is performed as follows. When there is an incoming call request from the outside line telephones 14 and 16, the control unit 38 checks the value of the display identifier included in the calling number information element in the call setting message, and when the value is "1", the calling party Since the office line number is sent, the calling party line number is detected from the call setup message. Next, the detected caller's office line number is the caller's number registration table.
50, and if so, the corresponding extension number storage section address that is paired with the calling station line number 52
The address where the corresponding extension number is stored is obtained from 53.
Next, the corresponding extension number is obtained from this address in the corresponding extension number storage section 46.

Calling party line number is a calling party number registration table
The registration of the calling station line number and the corresponding extension number when not registered in 50 is performed as follows. Control unit 38
When the corresponding extension number to be registered is determined as described above, the called number registration control unit 40 determines the calling number registration table 50 from the calling number registration number 51 in the calling number registration table 50. The head address of the unregistered area in the area is calculated, and the caller station line number is registered at that position. In addition, the start address of the unregistered area in the corresponding extension number registration table 60 is calculated from the number 61 of corresponding extension number registrations in the corresponding extension number registration table 60, and the corresponding extension number is registered at that position, and the calculated start address Is registered next to the calling party office line number in the calling party number registration table 50. In addition, the number of registered calling party numbers
Increase the values of 51 and the corresponding number of registered extension numbers 61 by 1.

When the caller station line number is registered and the call transfer is performed, it is necessary to correct the corresponding extension number. The process is performed as follows. Receiving the caller station line number from the control unit 38 and the extension number at the time of the disconnection request, the called party number correction control unit 42 examines the caller number registration table 50 to find the address at which the corresponding extension number is registered. To get Next, the value of the outside line registration flag 63 stored at the address in the corresponding extension number registration table 60 is checked. When the value is "0", registration is not performed. When the value is "1", the extension number at the time of disconnection request is registered in the above address.

Extension trunk circuits 30, 32, 34 of the private branch exchange 10.
The extension telephones 20, 22, and 24 housed in the signal lines 104, 106, and 108 in the same manner as the extension telephones 14 and 16 are the basic interfaces (B) defined as the ISDN interface.
RI (Basic Rate Interface) can be processed. The external telephones 20, 22 and 24 have the same external appearance as the external telephones 14 and 16 shown in FIG. Ie extension telephone
20, 22, and 24 are a handset 70, a push button (PB) dial-type dial button 72 for dialing a destination line number or extension number, and a hold button for transferring an incoming call.
74 and the caller's station line number as the destination telephone (extension telephone 2
0, 22, 24 or whether the caller's central line number is sent to the destination telephone so that the destination telephone can receive the service (calling number display service) displayed on the display of the external telephone 14, 16). Displays the caller station line number notification button 76 for the caller to specify, the PB button 80 used to send a PB signal tone to the call path after the call path is set, and various information The display unit 78 is included.

The hold button 74 is used to transfer the incoming call when the extension phones 20, 22, and 24 receive the incoming call. The display unit 78 displays the destination line number or extension number dialed by the user, the elapsed time after the start of the call, and the calling party line number or extension number when the incoming call request is received.

When the extension telephone sets 20, 22, and 24 receive an incoming call request from a caller who specifies not to perform the calling number display service, the display section 78 is sent with the caller station line number. It is displayed that it has not come. Although the calling number display service is provided on the display unit 78, when an incoming call request is received from the outside line telephones 14 and 16 of a calling station line number not registered in the calling station line number storage unit 44, A display indicating this is made. All of these displays are performed in response to an instruction from the control unit 38.

Next, the processing operation of the private branch exchange 10 having the above configuration will be described with reference to the flow charts of FIGS.

FIG. 4 shows an overall flow of processing operations of the private branch exchange 10. The control unit 38 stores a part of the PBX data (station data) in the storage unit in the control unit 38 as an initialization process when the private branch exchange 10 is installed or reset. The station data to be stored includes data relating to the number plan, the trunk accommodation position of the station line, and the like. Other station data include data registered in the calling party number registration table 50 and the corresponding extension number registration table 60 and backed up in the hard disk, which are respectively stored in the calling party station line number storage unit 44 and It is registered in the corresponding extension number storage unit 46. The data of the calling party number registration table 50 and the corresponding extension number registration table 60 is regularly backed up from the calling party station line number storage unit 44 and the corresponding extension number storage unit 46 to the hard disk (step S1).

After completing the initial setting, the control unit 38 controls the ISDN line network.
Check if there is an incoming request from 12 (step
S2). When the incoming call request is not received, the control unit 38 checks whether or not the call request is received from the extension telephones 20, 22, 24. If no call request has been received, the process returns to step S2 (step S3). The control unit 38 performs normal call processing when a call request is received from the extension telephones 20, 22, and 24,
Connect the extension phones 20, 22, 24 to the extension phones 14, 16 or other extension phones 20, 22, 24. After the call ends, step S2
Return to step (step S4).

The control unit 38 responds to the ISDN line network 12 when an incoming request is received from the ISDN line network 12. As a result, a call path is set up between the outside line telephones 14 and 16 and the private branch exchange 10. The communication path between the private branch exchange 10 and the extension telephones 20, 22, and 24 is set in step S15 described later. ISDN network 1
Whether or not the caller station line number is included in the call setup message sent from 2 is checked by the display identifier in the call setup message (step S5). When the control unit 38 determines that the calling station line number is not included, the signal line 10
A message, such as a message, indicates that an incoming call request has been sent to the display section 78 of all the extension telephones 20, 22, and 24 via 4, 106, and 108, but that the calling station line number has not been sent. While displaying, all the extension telephones 20, 22, and 24 are targeted for calling, and the process proceeds to step S13 described later (step S6).

If the caller station line number is included in the call setup message in step S5, the control unit 38 causes the caller number registration table 50 of the caller station line number storage unit 44 to display this caller number. It is searched whether the office line number is registered (step S7). As a result of the search, if not registered, the process proceeds to step S9, and if registered, the process proceeds to step S11 (step S8).

In step S6, all extension telephones are called, but the call may be limited to the operator of the private branch exchange or the extension telephones at the reception desk.

A detailed flow of the called party number registration processing which is performed when it is not registered will be described with reference to FIG. First, the control unit 38 registers the caller station line number although an incoming call request is received on each display unit 78 for all the extension telephones 20, 22, 24 via the signal lines 104, 106, 108. The fact that the call has not been made is visually displayed, and the line number of the calling station is also displayed. Then, the call is made to all the extension telephones 20, 22, and 24 (step S9-1).

The control unit 38 monitors whether there is a response from the extension telephones 20, 22, 24. Extension phone 20, 2
When there is a response from 2, 24, the extension trunk circuits 30, 32, 34 detect that there is a response and notify the control unit 38. Monitoring is continued until a response is detected (step S9-2).

When there is a response, the control unit 38 determines the extension telephone that has received the response first and the ISDN line that has received the incoming call.
Decides to set up a communication path between 100 and 102. The actual setting is performed in step S15. Control unit 38
Determines this extension number as the corresponding extension number and controls the destination number registration control unit 40 to cause the caller station line number storage unit 44 to correspond to the caller station line number and the corresponding extension number storage unit 46. The address and are registered as described above (step S9
-3).

The control unit 38 uses the call path established between the external telephones 14 and 16 and the private branch exchange 10 via the ISDN lines 100 and 102 to make a call to the user (caller) of the external telephones 14 and 16. )
Confirm with voice whether or not the extension number to be received this time will be automatically received from the next time. The caller responds with a dial button (step S9-4).
The control unit 38 determines whether to automatically receive an incoming call from the next time according to the response from the caller (step S9-5).

When it is determined that the incoming call is not automatically received, the control unit 38 controls the called number registration control unit 40 to store the external line in the corresponding extension number registration table 60 in the corresponding extension number storage unit 46. "0" is registered in the registration flag 63 (step S9-6). When it is determined that the incoming call is automatically received, the control unit 38 controls the called number registration control unit 40 to set the external line registration flag 63 in the corresponding extension number registration table 60 in the corresponding extension number storage unit 46 to "1. Is registered, and the corresponding extension number is also registered (step S9-7). Then, the number of registrations in the calling party number registration table 50 and the corresponding extension number registration table 60 is increased by 1 (step S9-8).

In step S9-1 described above, all extension telephones are called, but the call may be limited to the operator of the private branch exchange or the extension telephone at the reception desk.

Further, in the processing of step S9-4, when the caller is asked to confirm whether or not the outside line can be registered, the extension number of the extension phones 20, 22, and 24 that has made a response is set to the outside line telephone 1.
Notify 4, 16 users. If the extension number is not the one desired by the user, the user may dial whether or not the extension can be registered, and then the caller may dial the desired extension number using the button dial 42. . When the dial is desired by the user, there is no dial input within a predetermined time after the user dials the possibility of registering an outside line, and thus it can be determined that the extension number is desired by the user.

When it is found that the external line is not registered, for example, in step S9-1, it is confirmed to the external line telephones 14 and 16 whether the external line is registered, and then the display described in step S9-1 is displayed on the internal line telephone. Alternatively, the call may be made to the extension telephone. According to this method, the user of the extension telephone does not have to wait while confirming whether the extension telephone can register the outside line.

In the above process, although the caller is confirmed whether or not the outside line can be registered, the outside line registration may be performed without confirming whether or not the outside line can be registered.

Returning to FIG. 4, when the caller station line number is registered in the caller number registration table 50 in step S8, the address in the corresponding extension number storage unit 46 in which the corresponding extension number is registered According to the address, and the corresponding extension number and external line registration availability are read from the corresponding extension number registration table 60 in the corresponding extension number storage unit 46. The extension telephone having the read corresponding extension number is set as a call target (step S10).

The control unit 38 determines whether or not the outside line is registered (step S11). If the outside line registration is denied, the display unit 78 displays on all the extension telephones 20, 22, and 24 that the incoming call request is from the caller who is outside line registration denied.
Then, the call target determined in step S10 is changed so that all the extension telephones 20, 22, and 24 are call targets. The reason why the caller is registered as an outside line is to notify the extension telephones 20, 22, and 24 that the extension telephone is not the designated telephone (step S12).

It should be noted that, in step S12, a specific extension telephone,
For example, only the telephone operator or the telephone at the reception may be the target of the call.

Returning to FIG. 4, the extension telephone, which is the object of the call determined in steps S10 and S12, is called by ringing a ringer or the like (step S13).

The control unit 38 monitors whether or not there is a response from the extension telephone which is the object of the call. There is a response,
When the extension trunk circuits 30, 32, 34 detect this, the extension trunk circuits 30, 32, 34 inform the control unit 38 that there is a response. Then, it progresses to step S15. If there is no response, the control unit 38 continues to monitor until there is a response (step S14).

The control unit 38 controls the exchange processing unit 36 so that the exchange processing unit 36 can connect the ISDN line 100 connected to the extension telephone that has responded and the external telephones 14 and 16 that issued the incoming call request.
Set up a communication path with 102. The control unit 38 stores the extension numbers of the extension telephones 20, 22, and 24 for which the communication path is set in a storage unit (not shown) (step S15).

After the call path is set and the call is started, the control unit 38 periodically monitors whether there is a call transfer request from the extension telephones 20, 22, 24, and at the time of monitoring, the call transfer When the request is detected, the transfer destination instructed by the user of the extension telephone set is called, and the process proceeds to step S13. At this time, the control unit 38 stores the instructed extension number of the transfer destination in a storage unit (not shown). If no call transfer request is detected at the time of monitoring, the process proceeds to step S17 (step S16).

The call transfer here is a method of dialing the transfer destination from the extension telephone, but other than this, the above-mentioned absence transfer, busy transfer, delayed transfer at response, and specific call transfer may be performed.

Returning to FIG. 4, the control unit 38 monitors whether or not there is a disconnection request, and when there is a disconnection request, the process proceeds to step S18 shown in FIG. 5, and when there is no disconnection request, step S16.
Return to step S17.

In FIG. 5, the control unit 38 disconnects the communication path, and next, the extension number at the time of disconnection request stored in the storage unit (not shown) and step S10 or step S9.
-Compare with the corresponding extension number obtained in -7 (step S1
8).

If there is a difference as a result of the comparison, that is, if the call is transferred one or more times while the speech path is being set, the called number correction processing of step S20, which will be described later, is performed, and then step S2 is performed. Return to. If there is no difference, that is, if the call transfer is not performed, the process returns to step S2. Also, if the caller station line number is not sent from the ISDN line network 12, it is treated as if there is no difference, and the called number correction process is not performed, and the process returns to step S2 (step S2).
S19).

Next, the called party number correction processing will be described with reference to FIG. This processing is executed when the call transfer is performed once or more. First, the control unit 38 searches the caller number registration table 50 in the caller station line number storage unit 44 based on the caller station line number, and the address where the extension number to be modified is registered. Is obtained (step S20-1).

The area in the corresponding extension number registration table 60 indicated by the obtained address is read out, and it is judged whether or not the outside line registration flag 63 indicates whether or not the outside line is registered. If the outside line registration is denied, the called number is not corrected and the process returns to step S2 (step S20-2).

When the outside line can be registered, the control unit 38 controls the called number correction control unit 42 to register the extension number at the time of the disconnection request as the corresponding extension number indicated by the address obtained in step S20-1. Register in the area in table 60. Then, it returns to step S2 (step S20-3).

As described above, according to this embodiment,
When a caller of an unregistered outside line telephone makes an incoming call request, the private branch exchange itself registers the corresponding extension number, so that the telephone operator or the like does not need to perform registration work.

After the call path is set, or when there is an incoming call transfer during the call processing for setting the call path, the next incoming call request is made with the extension telephone that was finally talking. Since the call path is set between them, it is possible to prevent the incoming call request from the same outside line telephone from being repeatedly sent to the old person in charge, even though the person in charge in the company is changed.

In the above embodiment, the extension trunk circuits 30, 32, 34 in the private branch exchange 10 accommodate the extension telephones 20, 22, 24 via the lines 104, 106, 108, respectively. Instead of the telephones 20, 22, 24, a facsimile or the like may be accommodated. If a communication device that does not require human operation, such as a facsimile, is stored, step S9-4 in FIG.
Instead of inquiring whether or not the outside line can be registered by voice, the presence or absence of the outside line registration can be confirmed by exchanging a predetermined signal on the communication path.

Generally, a large number of extension telephones and external telephones can be accommodated in the private branch exchange and the ISDN line network. In the above embodiment, for convenience of explanation, the telephones of three extension lines and two outer lines are accommodated. However, the present invention is not limited to this.

When an incoming call request is received from an external telephone that is not registered as an external line and the incoming call request includes an extension number, the control unit 38 determines the extension number as a corresponding extension number and stores the corresponding extension number. It may be stored in the department and the incoming call request may be transmitted to the extension number. Thus, for the next incoming call request from the same external telephone, the incoming call request can be transmitted to the desired extension telephone even if the extension number is not included.

[0074]

As described above, according to the present invention, a private branch exchange capable of connecting an external line terminal to an internal line terminal without dialing an internal line number, and the work of registering the telephone number of the internal line terminal to be connected to the external line terminal can be performed. It is possible to provide an unnecessary private branch exchange.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of a private branch exchange according to the present invention.

2 is an external view showing an example of an outside line terminal connected to an ISDN line network in the embodiment shown in FIG.

FIG. 3 is a diagram showing a configuration example of a calling party number registration table and a corresponding extension number registration table in the same embodiment.

FIG. 4 is a process flow chart of the private branch exchange of the embodiment.

FIG. 5 is a process flow chart of the private branch exchange in the embodiment.

FIG. 6 is a flow chart of called number registration processing in the embodiment.

FIG. 7 is a flowchart of a called number correction process in the example.

[Explanation of symbols]

 10 Private branch exchange 12 ISDN network 14, 16 External telephone 20, 22, 24 Extension telephone 36 Exchange processing unit 38 Control unit 40 Recipient number registration control unit 42 Recipient number correction control unit 44 Caller office line number storage unit 46 Corresponding extension number storage

Claims (8)

[Claims] 1. A private branch exchange that accommodates an extension terminal and is connected to an ISDN line network, and receives an incoming call request to the extension terminal issued by an external line terminal accommodated in the ISDN line network, wherein the private branch exchange is an incoming call request. Destination information storage means capable of storing extension number information of the extension terminal to be connected to the outside line terminal that issued the call, in association with caller number information of the outside line terminal, and receiving from the ISDN line network. Corresponding to the calling party number detecting means for detecting the calling party number information of the outside line terminal included in the incoming call request, and the calling party number information detected by the calling party number detecting means when the request is received. Determination means for determining whether or not the extension number information is stored in the destination information storage means; and, as a result of the determination by the determination means, the extension number information is stored in the destination information storage means. When it is determined, in response to the incoming call request, an incoming call control means for making an incoming call to the extension terminal according to the stored extension number information; and, as a result of the determination by the determination means, the extension number information is the destination. Number determining means for determining extension number information associated with the detected caller number information when it is determined that the extension number information is not stored in the information storage means, and the determined extension number information for the detected calling number information. A private branch exchange comprising: registration means for registering in the destination information storage means in association with caller number information. 2. The private branch exchange according to claim 1,
The number determining means causes one or more predetermined extension terminals to display an incoming call according to an incoming call request issued by the outside line terminal, and the extension number information of the extension terminal that has made a response is used as the caller number. A private branch exchange characterized by using extension number information associated with information. 3. The private branch exchange according to claim 1 or 2, wherein the exchange is capable of connecting the outside line terminal to another extension line terminal based on an incoming call transfer request from the extension line terminal. Wherein the registration means associates the extension number information of the extension terminal connected to the outside line terminal at the time of a call path disconnection request with the detected caller number information being associated with the extension number information. A private branch exchange characterized by being registered in destination information storage means. 4. A private branch exchange that accommodates an extension terminal and is connected to an ISDN line network, and accepts an incoming call request to the extension terminal issued by an external line terminal accommodated in the ISDN line network, wherein the private branch exchange is an incoming call request. Destination information storage means capable of storing extension number information of the extension terminal to be connected to the outside line terminal that issued the call, in association with caller number information of the outside line terminal, and receiving from the ISDN line network. Corresponding to the calling party number detecting means for detecting the calling party number information of the outside line terminal included in the incoming call request, and the calling party number information detected by the calling party number detecting means when the request is received. Determination means for determining whether or not the extension number information is stored in the destination information storage means; and, as a result of the determination by the determination means, the extension number information is stored in the destination information storage means. When determined, in response to the incoming call request, incoming call control means for receiving an incoming call to the extension terminal according to the stored extension number information, and the external line terminal based on the incoming call transfer request from the extension terminal The call transfer means capable of connecting to another extension terminal, and the extension number information of the extension terminal connected to the extension terminal at the time when a call line disconnection request is made, to the detected caller number. A private branch exchange, comprising: registration means for registering in the destination information storage means in association with information. 5. A private branch exchange method using a private branch exchange that accommodates an extension terminal and is connected to an ISDN line network, and receives an incoming call request to the extension terminal issued by an external line terminal accommodated in the ISDN line network. The method stores extension number information of the extension terminal to which the extension terminal is connected by the private branch exchange when an incoming call request arrives from the extension terminal, in association with caller number information of the extension terminal, and stores the extension number information. When the outside line terminal issues an incoming call request, the incoming call request is accepted from the ISDN line network, the calling party number information of the outside line terminal included in the incoming call request is detected, and the detected calling party number is detected. It is determined whether or not the extension number information corresponding to the information is stored, and as a result of the determination, if it is determined that the extension number information is stored, in response to the incoming call request, the The extension terminal is called according to the stored extension number information, and when the result of the determination is that the extension number information is not stored, the extension number information associated with the calling party number information is determined. A private branch exchange method characterized in that the registration is performed by associating the determined extension number information with the detected calling party number information. 6. The private branch exchange method according to claim 5, wherein, when determining the extension number information, an incoming call is made to one or more predetermined extension terminals according to an incoming call request issued by the outside line terminal. Is displayed, and the extension number information of the extension terminal that responds is set as the extension number information associated with the calling party number information. 7. The private branch exchange method according to claim 5, wherein the outside line terminal is connected to the other extension terminal based on a call transfer request from the extension terminal, and the call path is used when the registration is performed. In the private branch exchange method, the extension number information of the extension terminal connected to the outside line terminal is associated with the detected caller number information at the time of the disconnection request. 8. A private branch exchange method using a private branch exchange which accommodates an extension terminal and is connected to an ISDN line network, and receives an incoming call request to the extension terminal issued by an external line terminal accommodated in the ISDN line network, The method stores extension number information of the extension terminal to which the extension terminal is connected by the private branch exchange when an incoming call request arrives from the extension terminal, in association with caller number information of the extension terminal, and stores the extension number information. When the outside line terminal issues an incoming call request, the incoming call request is accepted from the ISDN network, the calling party number information of the outside line terminal included in the incoming call request is detected, and the detected calling party number is detected. It is determined whether or not the extension number information corresponding to the information is stored, and as a result of the determination, if it is determined that the extension number information is stored, in response to the incoming call request, the The extension terminal is made to receive an incoming call according to the stored extension number information, and the external terminal is connected to the other extension terminal based on a call transfer request from the extension terminal, and at the time when a call path disconnection request is made, A private branch exchange method characterized in that extension number information of an extension terminal connected to an outside line terminal is registered in association with the detected calling party number information.