JPH08289028A - Automatic callback control system - Google Patents

Abstract

PURPOSE: To realize the automatic callback control system in which ineffective callback is prevented and the effectiveness of the service is enhanced. CONSTITUTION: Automatic callback service application subscribers 18 and subscribers 19 making a call to the subscribers 18 are contained in an electronic exchange 10. Supposing that the subscriber 18 is busy when the caller subscriber 19 dials a telephone number of the automatic callback service application subscriber 18, since the subscriber 18 is an automatic callback service application subscriber, the electronic exchange 10 uses an announcement device 16 to send a message inquiring about the necessity of a callback in place of transmission of a usual busy tone to the subscriber 19. When the caller subscriber 19 requests a callback, the subscriber 19 makes specific dialing according to a message command. The electronic exchange 10 stores the data of the caller subscriber 19 to a storage device 15 as callback request subscriber data 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic call-back control system, and more particularly to a program-controlled automatic call-back control system for an electronic exchange.

[0002]

2. Description of the Related Art As a conventional automatic call-back control method based on program control of an electronic exchange, a calling subscriber's telephone number is automatically set when an incoming call to a subscriber to which an automatic call-back service is applied or a call is not completed due to no answer. A method is known in which a call is stored in an electronic exchange and is automatically called back to the calling subscriber by dialing operation of a subscriber who applies the automatic call back service (Japanese Patent Laid-Open No. 2-216954: title of the invention). Telephone number notification subscriber control system ").

Also, the telephone numbers of a plurality of calling subscribers are stored in the storage unit of the telephone terminal with a display of the subscriber who applies the automatic call back service, these are displayed on the display of the telephone terminal, and the call back is performed from among them. An automatic call back control system has been conventionally known in which a desired calling subscriber is selected by a simple dial operation and called back.
-334245 gazette: The title of an invention "callback system").

[0004]

However, in any of the above-described conventional automatic call-back control methods, the calling subscriber unconditionally automatically returns when the call to the subscriber to which the automatic call-back service is applied is not completed. Even if he was registered as a necessary subscriber and no call back was necessary, there was no means to know this and he could not refuse it. Therefore, since the calling subscriber does not have the consciousness that the calling back is requested, it is considered that the calling back is eventually invalidated by leaving the seat.

On the other hand, even for the subscribers to which the automatic call back service is applied, there is a possibility that the registered call back requester may not judge whether the call back requester really needs the call back and may make an invalid call back.

The present invention has been made in view of the above points,
Provides a call back control method that can prevent invalid call back and improve service effectiveness by confirming the necessity of call back by dialing operation of the calling subscriber when the call to the subscriber applying the service is not completed. The purpose is to

[0007]

In order to achieve the above object, the present invention provides an automatic call back service application subscription in which an electronic exchange accommodating an automatic call back service application subscriber is stored in a storage device. Caller to the calling subscriber selected by the special number operation of the subscriber who applies the automatic call-back service, based on the telephone number of the caller and the telephone number of the calling subscriber who sends the call to the subscriber who applies the automatic call-back service In the automatic call back control method, when an incoming call to a subscriber who applies the automatic call back service is not completed, an inquiry is made to the calling subscriber as to whether or not a call back is necessary, and the calling subscriber responds to the inquiry with an automatic call. Identifies whether or not a return service is required, and when it is determined that an automatic return service is required, applies to the calling subscriber and the automatic return service The telephone number of the subscriber is obtained so as to store in the storage device.

Further, according to the present invention, when the calling subscriber who requests the automatic call back service dials the special number for canceling the call back request before executing the automatic call back service, the electronic exchange sets the special number for canceling the call back request. Upon receipt of the message, the call back request subscriber data for the subscriber who applies the automatic call back service in the storage device is searched, and the data of the calling subscriber who dialed the special code for canceling the call back request is deleted from the data. The deletion is notified to the calling subscriber.

[0009]

According to the present invention, when an incoming call is not completed when the subscriber applying the automatic call back service is busy or does not respond within a predetermined period, the electronic exchange makes an inquiry to the calling subscriber whether or not the call is necessary and the call is sent. When the call back request dial operation is performed by the subscriber, the call back request subscriber data is stored in the storage device of the electronic exchange for the first time. It will never be remembered.

Further, when the calling subscriber who requests the automatic call back service dials the special number for canceling the call back request before executing the automatic call back service, the data of the calling subscriber in the storage device can be deleted. .

[0011]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of an automatic call back control system according to the present invention. In the figure, the first electronic exchange 1
Reference numeral 0 is a communication path system device 11, a central processing unit 12, a call back control program 13 and call back request subscriber data 1
4 and 4 are stored in the storage device 15. The communication path system device 11 includes an announcement device 16 and a dial reception device 17 as components. The electronic exchange 10 accommodates a subscriber 18 who applies the automatic call back service and a subscriber 19 who sends a call to the subscriber 18. In addition, another second device that is connected to the electronic exchange 10 via a telephone network to which the common line signaling system is applied.
The electronic exchange 20 of the subscriber 21
Is housed.

Next, with the sequence diagram of FIG. 2, the subscriber 1
A procedure in which 9 receives an incoming call to the subscriber 18 to which the automatic call-back service is busy and makes a call-back request will be described. First,
The calling subscriber 19 is a subscriber 18 who applies the automatic call back service.
If the subscriber 18 is busy when the telephone number is dialed (step 22), the electronic exchange 10 joins the normal busy tone because the subscriber 18 is the subscriber who applies the automatic call back service. Message to the caller 19 instead of sending it to the person 19
It is sent from 6 (step 23).

As a result, the calling subscriber 19 who recognizes that the dial destination is the subscriber to which the automatic call back service is applied,
When calling back is requested, a specific dial operation is performed according to the instruction of the message (step 24). This dial operation is defined in advance for each system to which this method is applied.
Notify in a message.

When the electronic exchange 10 recognizes the dial operation requesting the call back from the calling subscriber 19 through the dial receiving device 17, the data of the calling subscriber 19 is stored in the storage device 15 and the call back requesting subscriber data 14 is stored. Accumulate as. The data to be stored may include the telephone number of the calling subscriber 19 and the telephone number of the called subscriber, that is, the subscriber 18 to which the automatic call back service is applied, as well as a call back request time.

When the storage is completed, the electronic exchange 10 sends a confirmation sound to the calling subscriber 19 to inform that the call back request is normally registered (step 25). Instead of the confirmation sound, the announcement device 16 may send a registration completion message. Thereafter, the calling subscriber 19 disconnects the line (step 26).

Next, with the sequence diagram of FIG. 3, the subscriber 1
A procedure for making a call back request will be described because a call has been received to the free automatic call back service application subscriber 18 but a response has not been obtained. When the calling subscriber 19 dials the telephone number of the subscriber 18 to which the automatic call back service is applied (step 31), the electronic exchange 10 puts the called subscriber 18 into a calling state and sends a ringing tone to the calling subscriber 19 ( Step 32).

However, if the called subscriber 18 does not respond within a predetermined time, the electronic exchange 10 determines that the called subscriber 1
Since 8 is a subscriber who applies the automatic call back service,
Instead of sending a normal time-out notification sound to the subscriber 19, a message for inquiring whether or not to call back is sent from the announcement device 16 (step 33). Subsequent procedures are the same as those in FIG. 2, and the calling subscriber 19 who recognizes that the dial destination is the subscriber who applies the automatic call back service performs a specific dial operation according to the instruction of the message when requesting the call back ( Step 34), electronic switch 10
Stores the data of the calling subscriber 19 in the storage device 15 as the call back requesting subscriber data 14, and the electronic exchange 10 gives the calling subscriber 19 a confirmation sound for notifying that the call back request is normally registered. It is sent (step 35). Thereafter, the calling subscriber 19 disconnects the line (step 3).
6).

Next, a case of making a call from a subscriber accommodated in another electronic exchange will be described with reference to FIG. The calling subscriber 2 accommodated in the second electronic exchange 20 shown in FIG.
When 1 dials the telephone number of the subscriber 18 to which the automatic call back service is applied (step 41), the electronic exchange 20 sends this telephone number to the head address signal IAM of the common line signaling system.
An electronic exchange 1 in which the receiving subscriber 18 is accommodated
To 0 (step 42).

When the electronic exchange 10 having received the IAM recognizes that the called subscriber 18 is busy and is a subscriber to which the automatic call back service is applied, the address completion signal A
Along with sending the CM (step 43), the announcement device 16 sends a message inquiring whether or not the call back is necessary (step 44).

When the above message is received by the calling subscriber 21 via the electronic exchange 20, the calling subscriber 21 recognizes that the dial destination is an automatic call back service application subscriber and requests a call back. In this case, according to the instruction of the message, the specific dial operation is performed as in the case of the same electronic exchange (step 45).

A dial operation for requesting a call back from the calling subscriber 21 is performed by the electronic exchange 20 and the dial receiving apparatus 1.
The electronic exchange 10 recognized through 7 stores the data of the calling subscriber in the storage device 15 as the call back requesting subscriber data 14 as in the case of the same electronic exchange, and a confirmation sound after completion of the storage is sent to the electronic exchange. Sending subscriber 21 via 20
(Step 46). In step 46, a message of registration completion may be sent from the announcement device 16 instead of the confirmation sound.

After that, the calling subscriber 21 makes the electronic exchange 20
The line to and is disconnected (step 47). As a result, the disconnection signal CLF is sent from the electronic exchange 20 to the electronic exchange 10 (step 48), and the RLG is responsively output from the electronic exchange 10 to the electronic exchange 20 (step 49).

Next, with reference to FIG. 5, the procedure in the case where the subscriber who applies the automatic call back service does not respond to the call originating from the subscriber accommodated in another electronic exchange will be described. In the figure, the same processes as those in FIG. 4 are designated by the same reference numerals. The calling subscriber 21 accommodated in the second electronic exchange 20 shown in FIG.
When the telephone number is dialed (step 51), the electronic exchange 20 puts this telephone number on the leading address signal IAM of the common line signaling system and sends it to the electronic exchange 10 in which the receiving subscriber 18 is accommodated (step 52). .

After confirming that the called subscriber 18 is free, the electronic exchange 10 which has received the IAM sends an address completion signal ACM (step 53), puts the called subscriber 18 into a calling state, and sends the calling subscriber. The ringing tone is sent to 21 (step 54). If the terminating subscriber 18 does not respond within a predetermined time, the electronic exchange 10 determines that the terminating subscriber 18 is an automatic call back service provider, and instead of sending the normal disconnection signal CLF, a non-billing response. The signal ANN is sent to the electronic exchange 20, and at the same time, the announcement device 16 sends a message inquiring whether the call back is necessary or not (step 54).

When the above message is received by the calling subscriber 21 via the electronic exchange 20, the calling subscriber 21 recognizes that the dial destination is the subscriber who applies the automatic call back service and requests the call back. In this case, according to the instruction of the message, the specific dial operation is performed as in the case of the same electronic exchange (step 45). After that, the same processing sequence as in FIG. 4 is performed.

As described above, according to this embodiment, the call back requester (the calling subscriber 19 or the calling subscriber 19 or 21), the electronic exchange 10 announces whether or not a call back is necessary, and the call back requester (calling subscriber 19 or 21) calls back to the storage device 15 of the electronic exchange 10 only after the call back request dial operation is performed. Since the call-back request data is stored as the requested subscriber data, the call-back request is not stored in the storage device 15 as the call-back request subscriber data when the call-back request is not necessary, and thus the unnecessary call-back request can be prevented. This can improve the effectiveness of the service.

The automatic call back execution procedure by the subscriber applying the automatic call back service is similar to the conventional method. When the subscriber 18 to whom the automatic call back service is applied performs a specific dial operation to execute the call back, the subscriber 19 whose telephone number is registered in the storage device 15 as the automatic call back requesting subscriber or the subscriber who joins the automatic call back requesting subscriber A call to the person 21 is automatically generated and a call back is executed. If multiple call back subscribers can be registered, only the calling subscriber who has requested the automatic call back is displayed on the terminal of the subscriber 18 to whom the automatic call back service is applied, and the call is returned by the additional dial operation of the subscriber 18. The destination is specified and the call back is performed.

Before the execution of the automatic call back, if the calling subscriber who has requested the call back wants to cancel the request, the processing is performed according to the sequence diagrams shown in FIGS. 6 and 7. If the subscriber 19 who has made a call back request to the automatic call back service application subscriber 18 accommodated in the same electronic exchange 10 wants to cancel the request for some reason after that, as shown in FIG. A call is made and a special number defined in advance for canceling the recall request is dialed (step 61).

Upon receiving the special number, the electronic exchange 10 sends a second dial tone to the subscriber 19 in order to know the subscriber to be called back to be released, and the subscriber telephone number of the other party who requested the call back is sent. Prompt dialing (step 62).

The subscriber 19 is the subscriber 18 to whom the call back request is made.
Then dial the phone number of (step 63),
The electronic exchange 10 retrieves the call back request subscriber data for the subscriber 18 in the storage device 15, confirms that the data of the calling subscriber 19 exists, and then deletes the data.

At the same time, the electronic exchange 10 sends a confirmation sound to the calling subscriber 19 to inform that the registration cancellation is completed (step 64). Thereafter, the calling subscriber 19 performs a disconnection operation (step 65). In addition,
In step 64, the announcement device 1 is used instead of the confirmation sound.
A registration cancellation completion announcement may be sent from 6.

A call made to a subscriber 18 to which the automatic call back service is applied by a calling subscriber 21 accommodated in an electronic exchange 20 different from the electronic exchange 10 in which the subscriber 18 to which the automatic call back service is applied is accommodated. To cancel the return request, as shown in FIG. 7, as in FIG. 6, a call from the calling subscriber 21, a special number dial and a second dial tone from the electronic exchange 20 and a call from the subscriber 21 are made. The telephone number of the return request destination subscriber 18 is sequentially transmitted (steps 71, 72, 73).

When the electronic exchange 20 determines that the received telephone number belongs to another electronic exchange 10, the signal connection control unit (SCCP: Signal allin) uses the common line signaling method.
gConnection Control Part)
In the unit data transfer signal UDT which is a line non-corresponding signal of
Put the information indicating that it is a cancellation request of the automatic call back service and the telephone numbers of both subscribers of the call back request,
The electronic exchange 10 accommodating the subscriber 18 is notified (step 74).

The electronic exchange 10, which has received the unit data transfer signal UDT, analyzes the content and retrieves the call back request subscriber data for the subscriber 18 in the storage device 15,
After confirming that the data of the calling subscriber 21 exists,
Delete this. In addition to this, the electronic exchange 10 returns the deregistration completion information on the unit data signal UDT to the electronic exchange 20 (step 75).

The electronic exchange 20, which has received the unit data transfer signal UDT, analyzes the contents and sends a confirmation sound to notify that the registration cancellation is completed (step 76). After that, the calling subscriber 21 performs a disconnection operation (step 77). In step 76, the registration cancellation completion announcement may be sent from the announcement device 16 instead of the confirmation sound.

As described above, according to this embodiment, the calling subscriber who has requested the call back can cancel the request before executing the automatic call back, so that invalid automatic call back can be prevented.

[0037]

As described above, according to the present invention,
In the past, all incoming incomplete calls to subscribers to which the automatic call back service was applied were registered in the storage device of the electronic exchange as recall request subscriber data. If the call back request is not necessary, the call is requested by the exchange and the call back request dial operation is performed by the calling subscriber to store the call back request subscriber data in the storage device of the electronic exchange. Since the storage device is not stored as the call back requesting subscriber data, it is possible to prevent the invalid call back execution and improve the effectiveness of the automatic call back service.

When the calling subscriber who requests the automatic call back service dials the special number for canceling the call back request before executing the automatic call back service, the data of the calling subscriber in the storage device of the electronic exchange is stored. Since it can be deleted, unnecessary call back can be prevented even for a call back request that is no longer necessary due to some circumstances, and it is possible to further improve the reliability of the automatic call back service.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an embodiment of the present invention.

FIG. 2 is an explanatory sequence diagram of an example when a call back request is made by a calling subscriber housed in the same electronic exchange.

FIG. 3 is a sequence diagram for explaining another example when a calling back request is made by a calling subscriber housed in the same electronic exchange.

FIG. 4 is an explanatory sequence diagram of an example when a calling back request is made by a calling subscriber housed in a different electronic exchange.

FIG. 5 is a sequence diagram for explaining another example when a call back request is made by a calling subscriber housed in a different electronic exchange.

FIG. 6 is a sequence diagram for explaining an example when a calling subscriber who is accommodated in the same electronic exchange cancels a call back request.

FIG. 7 is an explanatory sequence diagram of an example when a call-back subscriber withdrawn in a different electronic exchange cancels a call back request.

[Explanation of symbols]

 10 First Electronic Switch 11 Call Path System Device 12 Central Processing Unit 13 Callback Control Program 14 Callback Request Subscriber Data 15 Storage Device 16 Announcement Device 17 Dial Receiver 18 Automatic Callback Service Applicable Subscriber 19, 21 Calling Subscribe Person 20 Second electronic exchange

Claims (3)

[Claims] 1. An electronic exchange accommodating an automatic call back service application subscriber is provided to a telephone number of the automatic call back service application subscriber stored in a storage device and the automatic call back service application subscriber. In the automatic call-back control method for executing the call-back to the calling subscriber selected by the special number operation of the subscriber applying the automatic call-back service, based on the telephone number of the calling subscriber that has transmitted When an incoming call is not completed to the subscriber to which the service is applied, an inquiry is made to the calling subscriber as to whether or not a call back is necessary, and in response to the inquiry, it is identified by dial operation from the calling subscriber whether or not the automatic call back service is necessary. However, when it is determined that the automatic call back service is necessary, the telephone numbers of the calling subscriber and the subscriber who applies the automatic call back service are stored in the memory. Automatic call-back control method and to store the location. 2. The electronic exchange accommodating the subscriber to which the automatic call back service is applied is busy or not responding for a predetermined period when the calling subscriber makes a call to the subscriber to which the automatic call back service is applied. 2. The automatic call-back control according to claim 1, wherein at some time, in order to inquire of the calling subscriber whether or not the call-back is necessary, the call-back necessity inquiry message is sent from an announcement device. method. 3. When the calling subscriber requesting the automatic call back service dials a special number for canceling the call back request before the execution of the automatic call back service, the electronic exchange sets the call cancel request for canceling the call back request. The data of the calling subscriber who retrieves the call-back request subscriber data for the subscriber who applies the automatic call-back service in the storage device by receiving the special number and dials the special number for canceling the call-back request from among them. 2. The automatic call back control system according to claim 1, wherein said deletion is notified and said deletion is notified to said calling subscriber.