JPH09271052A - Private branch exchange system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain the scrupulous incoming call reject service by recording a voice message from a caller and sending the voice message to a called terminal equipment with an extension number when the incoming call reject of the extension number is released. SOLUTION: A central controller 15 reads an extension number of a called destination. Then a discrimination means of the central controller 15 discriminates whether or not the extension number of a called destination is set to an incoming call reject extension number setting table included in an incoming call reject storage device 22. A voice mail equipment 20 based on the extension number of the called destination retrieves the mail box 20a corresponding to the number. The voice mail equipment 20 sends a voice guide denoting it that a message is left to the party whose incoming call is rejected, selects a recording mode and records the caller message to the retrieved mail box 20a. When the incoming call reject is released, the message recorded in the mail box 20a is sent to an extension terminal equipment.

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 system having an incoming call rejection function for rejecting an incoming call from an extension line or an office line.

[0002]

2. Description of the Related Art Conventionally, a private branch exchange system has been provided with various service functions, and one of the services is a call rejection function for rejecting an incoming call.

The operation of the conventional private branch exchange system to provide the call rejection service will now be described with reference to the block diagram of FIG.

As shown in the figure, in the conventional private branch exchange system 10, a call path network 11 in which a call path is formed.
In addition, the office lines 18a to 1 from the ISDN network 30 outdoors, for example.
ISDN trunk circuits 13a to 13n for accommodating 8n and receiving signals from the outside, IOT (intra-station trunk circuit) 24 for connection within the own station, and line trunk circuits 12a to 12n connected to extension terminals 17a to 17n. Are connected to each other.

The communication path network 11 is a central control unit 1.
5, the central control unit 15 is connected to a storage unit 21 in which the states of the above-mentioned trunk circuits are stored, and the contents of this storage unit 21 and the control data bus 16 are input. ISDN trunk circuit 13
A call path is formed in the call path network 11 from the state changes of the a to 13n and the line trunk circuits 12a to 12n.

By the central control unit 15, each connection process, that is, the outgoing call process from the extension terminal 17 to the external ISDN station line 18 (outgoing connection) and the incoming call process from the external ISDN station line 18 to the extension terminal 17 (incoming connection) ), And extension terminal 17
From the terminal to another extension terminal 17 (connection within the own station) is performed.

The extension terminal 1 for which incoming call rejection is set here
The operation of the central controller 15 when there is an incoming call to 7a and the incoming call is rejected for that call will be described with reference to the flowchart of FIG. To do.

The central controller 15 first determines whether or not the incoming call is from the central office line (step 100).

When the call is from the central office line (for example, when there is an incoming call from the ISDN central office line 18a toward the extension terminal 17a), the central control unit 15 controls the ISDN central office line 18 to operate.
The presence of an incoming call is detected from the change in the ISDN trunk circuit 13a of a, and the extension number of the incoming call destination is read (step 101). Next, the state of the line trunk circuit 12a corresponding to the extension number is detected, and it is determined whether or not the extension terminal 12a has lifted the handset (off-hook state) (step 102). If off-hook, IS
The DN trunk circuit 13a is connected to a predetermined transfer destination such as a switchboard or another extension terminal, for example, another extension terminal 17n (step 103). If on-hook,
The call is connected to the extension terminal 17a having the extension number (step 104). After that, the sender is the extension terminal 1 of the transfer destination.
7n person or a desired person is called (step 115).

On the other hand, when the call is a connection within the own station (for example, when there is an incoming call from the extension terminal 17b to another extension terminal 17a), the central controller 15 first reads out the extension number of the called party (step 110), and the line trunk circuit 12b of the extension terminal 17b to the IOT (internal station trunk) 24
Connect to Next, the central controller 15 uses the storage device 21
Then, it is searched whether the extension terminal 17b is set to reject the call (step 111). If it is set to reject the call, a connection restriction sound is sent to the calling terminal 17b (step 112). If the call is not rejected, the call is connected to the line trunk circuit 12a of the extension terminal 17a (step 104) and the caller talks to the desired party (step 115).

As described above, in the conventional private branch exchange system, it cannot be said that the incoming call rejection function is realized for the call of the incoming connection, and the call for the calling terminal is also made for the call of the local station. Sending the connection control sound is not enough service.

As a countermeasure against this, Japanese Patent Publication No. 62-47021
In the gazette, an incoming call restriction memory for setting incoming call rejection is provided for each extension terminal, and the central processing unit refers to this incoming call restriction memory every time there is an incoming call to the private branch exchange, and the incoming call rejection is set. Discloses a technique of connecting the incoming call to a relay stand and determining whether or not the operator of the relay stand connects the call to the original called terminal.

[0013]

However, in this technique, when the incoming call is rejected, the call is connected to the relay stand. Therefore, for example, when the caller wants to leave a message for the callee, the relay stand is handled once. There is no other choice but to leave the message to the caller and then have the attendant of the relay stand convey the message to the called party, and the attendant of the relay stand may forget to convey the message.

Further, when the processing after rejecting the incoming call is entrusted to the operator of the relay stand, when the call volume to the private branch exchange becomes particularly large, the operator of the relay stand is burdened and the call is rejected. There is a problem that the service to the caller and the callee is also fixed.

It is therefore an object of the present invention to realize a private branch exchange system capable of providing a fine-grained call refusal service to a caller and a callee without manual intervention when the call is rejected.

[0016]

A private branch exchange system according to the present invention includes an incoming call rejection storage unit that stores the presence or absence of incoming call rejection settings for each extension terminal, and an incoming call rejection call when an extension terminal has an incoming call. With reference to the storage means, a judgment means for judging whether or not incoming call rejection is set for the extension terminal, and if incoming call rejection is set for the extension terminal that received the incoming call,
And a message storing means for storing a message sent from the transmitting terminal.

The private branch exchange system of the present invention is characterized in that the message storage means prompts the calling terminal to send a message to the extension terminal before receiving the message from the calling terminal. To do.

Further, the private branch exchange system of the present invention is characterized in that when the setting for rejecting an incoming call is canceled in the message storage means, the message stored in the message storage means is sent to the extension terminal. .

As described above, when an incoming call tries to connect to an extension terminal for which the call rejection is set, a voice message from the caller is recorded and the call rejection of the extension terminal is released. When that happens, the voice message is sent to the receiving terminal.

As a result, it is possible to realize a private branch exchange system capable of providing a fine-grained call rejection service to the caller and the callee without human intervention when the call is rejected.

Further, the private branch exchange system of the present invention is characterized in that the message storing means is a voice mail device.

As described above, by constructing the message storage means by the voice mail device, it is possible to provide a simple and detailed incoming call rejection service.

Further, the private branch exchange system of the present invention has an exchange to which a plurality of extension terminals are connected, and the exchange sends a mailbox signal corresponding to the extension terminal set to reject incoming call to the voice mail device, The voice mail device is characterized in that the message of the calling terminal is stored in the corresponding mailbox based on the mailbox signal.

As described above, by sending the mailbox signal from the exchange to the voice mail device, it is possible to provide a fine-grained call rejection service.

[0025]

BEST MODE FOR CARRYING OUT THE INVENTION One embodiment of a private branch exchange system of the present invention will be described with reference to FIG. FIG. 1 is a block diagram showing a private branch exchange system 10.

In the private branch exchange system 10, a call path network 11 in which a call path is formed is connected to an outdoor IS, for example.
ISDN trunk circuits 13a to 13n that accommodate office lines 18a to 18n from the DN network 30 and receive signals from the outside.
And IOT (trunk circuit in own station) 24 for connection in own station
, Line trunk circuits 12a to 12n connected to extension terminals 17a to 17n, and a standard telephone interface 14 connected to a voice mail device 20 having a mailbox 20a, respectively.

The channel network 11 is a central control unit 1.
5, the central control unit 15 is connected to a storage unit 21 in which the states of the above-mentioned trunk circuits are stored, and the contents of this storage unit 21 and the control data bus 16 are input. ISDN trunk circuit 13
A call path is formed in the call path network 11 from the state changes of a to 13n and the line trunk circuits 12a to 12n.

In addition to the storage device 21 for storing the state of each trunk circuit, the central control unit 15 has an incoming call rejection for storing the presence or absence of incoming call rejection setting for each extension terminal and the type of processing at the time of incoming call rejection. Storage device 22 is connected.

First, the user of the extension terminals 17a to 17n or the maintenance person of the private branch exchange sets beforehand the call rejection setting from the extension terminals 17a to 17n or the maintenance terminal (not shown) and the processing type (service type when rejecting the call). ) Is set in the incoming call rejection storage device 22 described later. The processing at the time of rejecting the incoming call includes processing for transferring to an extension terminal other than the incoming call rejection terminal (forwarding service), processing for making the caller hear a busy tone (busy tone service), and a message from the caller. Is stored and the message stored later is sent to the extension terminal that rejected the incoming call (voice message service).

The operation when a call is received by the extension terminal for which the call rejection is set in this way will be described with reference to the flowcharts of FIGS.

First, the central controller 15 first reads out the extension number of the called party (step 201). Next, the judgment means (not shown) included in the central control unit 15 determines that the extension number of the call destination is the call rejection extension number setting table 22a (see the table of FIG. 5A) included in the call rejection storage device 22. (See step 20).
2). In the example of FIG. 5A, the extension numbers “1111” and “1
Extension terminals "112" and "1114" are rejecting incoming calls.

If the extension number of the called party is not set in the call rejection extension number setting table 22a, or even if it is set, the extension number of the caller is not set (in the case of connection within the own station). , The call is received by the extension terminal of that number (step 220).

On the other hand, if it is set, the transfer destination number storage table 22b included in the incoming call rejection storage device 22 is referred to (see the table of FIG. 5B), and the following value is obtained by the value corresponding to this extension number. (Step 20)
3).

When data (transfer destination extension number) for the transfer service is set in the transfer destination storage table 22b (callee extension number "1111" in FIG. 5A, FIG.
The central controller 15 transfers the call to the extension terminal having the extension number "1115" (corresponding to the transfer destination number "1115" in (b)) (step 204).

When busy tone service data is set in the forwarding destination storage table 22b (the called party extension number "1112" in FIG. 5A, the forwarding party number "F" in FIG. 5B).
Corresponding to "FFF"), central controller 15 connects the call to a busy tone trunk (not shown in FIG. 1) and causes the call originator of the call to hear the busy tone (step 205).

When data for voice message service is set in the transfer destination storage table 22b (see FIG. 5).
(A) Corresponding to the extension number "1114" of the destination, the destination number "0000" of FIG. 5B), the central controller 15
Makes an incoming call to the voice mail device 20 through the standard telephone interface 14 of FIG. 1 until a response is returned from the voice mail device 20 (step 2).
06,207). When there is a response from the voice mail device 20, the central control device 15 sends the extension number of the called party to the voice mail device 20 (step 208), and while maintaining the communication path between the call and the voice mail device 20, The voice mail device 20 is responsible for controlling the response with the caller.

The voice mail device 20 is based on the received extension number of the called party, and the mailbox 2 corresponding to that number.
0a is searched to prepare to store the voice message to the called party (step 209). The mailbox 20a has a function of storing a message sent from the sending terminal. After that, the voice mail device 20
Issues a voice guidance to the caller to the effect that a message for the call rejecter can be left (step 210), then switches to recording mode and records the caller's message in the retrieved mailbox 20a. Yes (Step 21
1, 212). When the recording is finished, the call and the call with the voice mail device 20 are finished.

On the other hand, the central control unit 15 monitors whether or not the extension terminal in which the voice message is stored cancels the setting of call rejection by periodically scanning the call rejection extension number setting table 22a ( Step 213
214), if it is released, it is notified to the voice mail device 20 (steps 214, 215). The voice mail device 20 makes a call to the extension terminal that has canceled the call rejection, and when there is a response, it sends out a voice saying "I have a message stored during the call rejection setting period."
The message recorded in the mailbox 20a is sent to the extension terminal (step 216).

As described above, the extension number of the extension terminal which is rejecting the call and the processing type when the call is rejected are stored in advance in the call rejection storage device, and when the extension terminal receives a call, the calling terminal The voice message from the user, and later conveys the voice message to the user of the receiving terminal.

As a result, a call rejection function having a higher service property can be realized.

In the above-described embodiment, the processing at the time of rejecting the incoming call is described without dividing into the incoming connection and the internal connection of the own station. However, the incoming call rejection extension number setting table 22a and the forwarding number storage table 22b are By dividing into incoming connection and internal connection, and setting different data for each, it is possible to separate the processing when rejecting incoming calls from the central line and incoming calls from the internal line. It becomes possible to provide detailed services.

[0042]

According to the present invention, it is possible to realize a private branch exchange system capable of providing a fine-grained call refusal service to callers and callees without manpower at the time of call rejection.

[Brief description of drawings]

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

FIG. 2 is a flowchart showing the operation of the embodiment according to the present invention.

FIG. 3 is a flowchart showing the operation of the embodiment according to the present invention.

FIG. 4 is a flowchart showing the operation of the embodiment according to the present invention.

FIG. 5 is a diagram showing a call rejection extension number setting table and a transfer destination number storage table.

FIG. 6 is a block diagram showing a private branch exchange system according to the prior art.

FIG. 7 is a flowchart showing the operation of a private branch exchange system according to the prior art.

[Explanation of symbols]

 10 private branch exchange system 11 speech path network 12a to 12n line trunk circuit 13a to 13n ISDN trunk circuit 15 central control device 16 control data bus 17a to 17n extension terminal 18a to 18n office line 20 voice mail device 20a mailbox 21 storage device 22 incoming call Rejection storage device

Claims (5)

[Claims] 1. An incoming call rejection storage means for storing whether or not there is an incoming call rejection setting for each extension terminal, and when an extension terminal receives an incoming call, the extension terminal is referred to and an incoming call is received. Equipped with a judging means for judging whether or not refusal is set, and a message storing means for storing a message sent from the calling terminal if the incoming call is rejected to the extension terminal. Private branch exchange system. 2. The message storage means, before receiving a message from the calling terminal, prompts the calling terminal to send a message to an extension terminal. A private branch exchange system according to 1. 3. The message storage means sends the message stored in the message storage means to the extension terminal when the setting for rejecting the incoming call is released. The private branch exchange system according to claim 2. 4. The private branch exchange system according to claim 2, wherein the message storage means is a voice mail device. 5. An exchange having a plurality of extension terminals connected thereto, the exchange sending a mailbox signal corresponding to the extension terminal for which a call rejection is set to the voice mail device, and the voice mail. 5. The private branch exchange system according to claim 4, wherein the device stores the message of the calling terminal in the corresponding mailbox based on the mailbox signal.