JPS6236953A - Callback system - Google Patents

Abstract

PURPOSE:To set quickly a callback by allowing an outgoing terminal set to the callback reservation registering state to reject the setting of a new call and allowing terminal set to start immediately callback setting soon after a busy call is finished. CONSTITUTION:The outgoing terminal set 600 is provided with a request means 601 adding a callback request to a call signal and sending the result to a digital incorporated communication network 500, a reservation registration means 602 setting the callback reservation registrating state when a callback reservation end release confirming signal from the communication network 500 and rejecting other outgoing/incoming and a reservation release means 603 releasing the callback reservation registrating state set by the means 602 when a callback incoming signal is received from the communication network. Further, an incoming terminal set 700 is provided with a reservation means 701 checking the propriety of the reservation of a callback when a callback reservation signal is received from the communication network 500, set to the callback reservation state when it is discriminated during talking and to be possible for reservation and sending the callback reservation end signal to the communication network 500.

Description

[Detailed Description of the Invention] [Summary] In the digital integrated communication network 1, when the originating terminal sends a call signal with a callback request, the terminating terminal monitors the termination of the busy call, and the originating terminal sets up a new call. To promptly and reliably execute a callback by rejecting the call and immediately starting a callback from the destination terminal to the originating terminal when the busy call ends.

[Industrial application field]

The present invention relates to improvements in callback methods in digital integrated communication networks.

As part of the services provided by the digital integrated communication network, incoming calls are reserved and registered on the terminal in use, and when the call on the called terminal ends, the calling and called terminals are automatically connected and the call is made. A so-called callback service that makes this possible is being put into practical use.

In this type of callback service, it is desirable that a callback be established between the originating terminal and the terminating terminal as soon as possible after the terminating terminal ends the call.

[Conventional technology]

FIG. 7 is a diagram showing an example of a conventional digital integrated communication network, and FIG. 8 is a diagram showing an example of a conventional callback system.

In FIGS. 7 and 8, the digital integrated communication network 1
A calling terminal 2 connected to a subscriber line 4 accommodated in a subscriber line 4 and assigned a subscriber number Na makes a call to a terminating terminal 3 connected to a subscriber line 5 assigned a subscriber number Nb. death,
Assuming that the destination terminal 3 is busy, the originating terminal 2 sends a calling signal SUI (cbr) with a callback request to the digital integrated communication network 1.

In the digital integrated communication network 1, a callback processing mechanism 11 registers a callback reservation for a call from a calling terminal 2, and sends a calling signal SUI (cbr) with a callback request.
The idle state of the called terminal 3 in the busy state specified by is monitored at predetermined intervals T, and when it is detected that the called terminal 3 is in the busy state, it sends an incoming call signal SU2 to the calling terminal 2. , When the call origination signal AL1 and then the response signal CNI are returned from the originating terminal 2, a response confirmation signal CA is returned to the originating terminal 2,
Further, an incoming call signal SU2 is sent to the destination terminal 3.

When the call origination signal ALL is returned from the destination terminal 3, the digital integrated communication network 1 sends the call indication signal AL2 to the originating terminal 2, and when the response signal CNI is subsequently returned from the destination terminal 3, the digital integrated communication network 1 sends the call indication signal AL2 to the originating terminal 2. A response confirmation signal CA is sent to the calling terminal 2, and a response display signal CN2 is sent to the originating terminal 2.

Thereafter, the calling terminal 2 and the receiving terminal 3 can communicate.

[Problem that the invention seeks to solve]

As is clear from the above explanation, in the conventional callback method, the calling signal SUI with a callback request is
The digital integrated communication network 1 that has received the (cbr)
Even if the busy call ends, a new call will be set up on the terminating terminal 3 until the next monitoring cycle of the digital integrated communication network 1 arrives, and the digital integrated communication network 1 will check whether the terminating terminal 3 is free or not. Even when this is detected, a new call has been set up at the originating terminal 2, and there is a possibility that a callback cannot be set up immediately.

[Means for solving problems]

FIG. 1 is a diagram showing the principle of the present invention.

In FIG. 1, a calling terminal 600 includes a requesting means 601 that adds a callback request to a calling signal and sends it to a digital integrated communication m500, and a digital integrated communication network 50.
a reservation registration means 602 that sets a callback reservation registration state when receiving a release confirmation signal with callback reservation completion from 0 and rejects other outgoing/incoming calls thereafter; and a callback incoming call signal from the digital integrated communication network 500. Reservation canceling means 603 is provided for canceling the callback reservation registration state set by the reservation registration means 602 when the callback reservation registration state is received.

In addition, when the destination terminal 700 receives a callback reservation signal from the digital integrated communication network 500, it checks whether or not a callback can be reserved, and if it is determined that the call is in progress and reservation is possible, it sets the callback reservation state. A reservation means 701 that sends a callback reservation completion signal to the digital integrated communication network 500, a release monitoring means 702 that monitors the termination of a busy call when the callback reservation state is set, and a release monitoring means 702 that is busy. Implementation means 703 is provided which sends a callback call signal to the digital integrated communication 14500 to perform a callback when release of the call is detected.

Furthermore, if the digital integrated communication network 500 receives a calling signal with a callback request added from the calling terminal 600 and the called terminal 700 is busy, it sends a callback reservation signal to the called terminal 700. Reservation signal sending means 501
When a callback reservation completion signal is received from the destination terminal 700, a reservation completion addition means 502 adds callback reservation completion to the release confirmation signal and sends it to the origination terminal 600.
and is provided.

[Effect]

That is, according to the present invention, the originating terminal set to the callback reservation registration state refuses to set up a new call from now on, and the terminating terminal set to the callback reservation state refuses to set up a new call immediately after the busy call ends. Since the callback setup is initiated, the callback can be setup quickly and reliably, improving the callback service.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 is a diagram showing a digital integrated communication network according to one embodiment of the present invention, FIG. 3 is a diagram showing a calling terminal according to one embodiment of the present invention, and FIG. 4 is a diagram showing one embodiment of the present invention. FIG. 5 is a diagram showing a callback method according to an embodiment of the present invention, and FIG. 6 is a diagram illustrating various signal formats in FIG. 5. Note that the same reference numerals refer to the same objects throughout the plan.

In FIG. 2, the digital integrated communication network 1 is provided with a reservation signal sending mechanism 12 and a reservation completion adding mechanism 13. In addition, in FIG. 3, a callback request mechanism 213 and a callback reservation registration mechanism 21 are included in the processor 211.
4 and a callback reservation cancellation mechanism 215 are provided. Furthermore, in FIG. 4, a callback reservation mechanism 216, a busy call release monitoring mechanism 217, and a callback execution mechanism 218 are provided in the processor 211.

Note that the transmitting section 201, receiving section 202, signal transmitting and receiving section 203, handset 204, telephone circuit 205, codec 206, switch section 207, push button 208, display section 209, input/output control in FIGS. 3 and 4 The unit 210 and the memory 212 are components of a conventional originating terminal 2 and terminating terminal 3.

2 to 7, the originating terminal 2 that makes a call to the terminating terminal 3 sends the signal type SU, the originating subscriber number Na, the terminating subscriber number Nb, the subaddress Nas of the originating terminal 2, and the callback request information. A calling signal 5UI with a callback request (cbr) (FIG. 6(a)) including the cbr is created by the callback request mechanism 213 and sent to the digital integrated communication W41 via the subscriber line 4.

The digital integrated communication ml that has received the calling signal SUI (cbr) with a callback request sends a calling confirmation signal CP to the calling terminal 2, and then sends a calling signal SU with a callback request.
When identifying that callback request information cbr is included in I (c b r) and detecting that the destination terminal 3 is busy, the reservation signal sending mechanism 12 is activated. The reservation signal sending mechanism 12 creates a callback reservation signal CBR (FIG. 6(G)) including the signal type CBR, the calling subscriber number Na, the called subscriber number Nb, and the subaddress Nas, and sends the subscriber line 5. It is sent to the destination terminal 3 via the destination terminal 3.

The destination terminal 3 that has received the callback reservation signal CBR sets the callback reservation state by the callback reservation mechanism 216 in the processor 211, and then sets the signal type CBA,
A callback reservation completion signal CBA (FIG. 6(C)) containing the calling subscriber number Nb, called subscriber number Na and subaddress Nas is created and sent to the digital integrated communication network 1 via the subscriber line 5. , and the busy call release monitoring mechanism 21
Start up 7. The busy call release monitoring mechanism 217
monitor the termination of busy calls.

Upon receiving the callback reservation completion signal CBA, the digital integrated communication network 1 activates the reservation completion addition mechanism 13. The reservation completion addition mechanism 13 uses the signal type RC1 originating subscriber number N.
b. Create a call hack reservation completion release confirmation signal RC (cba) (FIG. 6(d)) containing the called party number Na, subaddress Nas, and callback reservation completion information 11cba, and send it via the subscriber line 4. and sends it to the originating terminal 2.

The originating terminal 2 that has received the release confirmation signal RC (cba) with callback reservation completion activates the callback reservation money 83 mechanism 214 in the processor 211 .

The callback reservation deposit 83mm 214 sets the callback reservation registration state and displays the callback reservation registration on the display unit 209 via the input/output control unit 210.
Thereafter, new calls to and from the originating terminal 2 will be rejected.

Eventually, at the destination terminal 3, when the busy call release monitoring mechanism 217 detects the end of the busy call, the callback implementation mechanism 21
8. The call hack implementation mechanism 218 generates a callback calling signal SUI (cb) (FIG. 7(a)) including the signal type SU, calling party number Nb, called party number Na, sub address Nas, and callback information cb. digital integrated communication network 1 via subscriber line 5.
Send to.

The digital integrated communication network 1 that has received the call hack calling signal SUI (cb) calls the destination terminal 3 according to a known procedure.
At the same time, the callback calling signal 5U1 (Cb) received from the receiving terminal 3 is sent to the calling terminal 2 via the subscriber line 4 as the callback receiving signal SU2 (Cb). Send.

In the originating terminal 2 that has received the callback incoming signal SU2 (c b), the call hack reservation canceling mechanism 215 cancels the call hack reservation registration state that is being set, and displays the display unit 2.
The callback reservation registration display in 09 is deleted and a call hack is displayed instead. Thereafter, the processor 211 displays the incoming call in the originating terminal 2 and sends a call origination signal ALL to the digital integrated communication network 1 according to a known procedure. When the originating terminal 2 becomes responsive, Sends a response signal CNI.

The digital integrated communication network 1 communicates with the originating terminal 2 using a known procedure.
When it receives the call origination signal ALL from the calling terminal 3, it sends the calling display signal AL2 to the called terminal 3, and when it receives the response signal CN1 from the calling terminal 2, it sends the response confirmation signal CA to the calling terminal 2, and at the same time sends the answer display signal CN2 to the called terminal 3. Send out.

From now on, the originating terminal 2 and the destination terminal 3 are connected to the digital integrated communication network 1.
Start a call via .

As is clear from the above explanation, according to this embodiment, the destination terminal 3 that has received the callback reservation signal CBR from the digital integrated communication network 1 continuously terminates the busy call using the busy call release monitoring mechanism 217. As soon as the busy call ends, the callback implementation mechanism 218 starts setting up a callback for the originating terminal 2. Additionally, a release confirmation signal RC (with callback reservation completion) is sent from the digital integrated communication network 1.
Since the calling terminal 2 that has received the callback reservation registration mechanism 214 rejects the setting of a new call, it is always placed in a state where a callback can be set.

Note that FIGS. 2 to 7 are only one embodiment of the present invention, and for example, the configurations of the originating terminal 2 and the terminating terminal 3 are not limited to those shown in the figures;
Although many other modifications may be considered, such as using a common terminal for originating and receiving terminals, which is equipped with a callback request mechanism 213 to a callback execution mechanism 218 in the terminal 1, the effects of the present invention remain the same in either case.

〔Effect of the invention〕

As described above, according to the present invention, in the digital integrated communication network, the originating terminal set to the callback reservation registration state refuses to set up a new call from now on, and the terminating terminal set to the callback reservation state As soon as the busy call is terminated, the setting of the call reserved for call hacking is started, so that the call reserved for call back can be set quickly and reliably, and the call back service is improved.

[Brief explanation of drawings]

1 is a diagram illustrating the principle of the present invention, FIG. 2 is a diagram illustrating a digital integrated communication network according to an embodiment of the present invention, FIG. 3 is a diagram illustrating a calling terminal according to an embodiment of the present invention, and FIG. 5 is a diagram showing a called terminal according to an embodiment of the present invention, FIG. 5 is a diagram showing an example of a call according to an embodiment of the present invention, and FIG. 2 is a diagram illustrating an example of a conventional evening service. In the figure, 1 and 500 are digital integrated communication networks;
2 and 600 are originating terminals, 3 and 7°O are destination terminals, 4
and 5 is a subscriber line, 12 is a reservation signal sending mechanism, 13 is a reservation completion addition mechanism, 211 is a processor, 213 is a callback request mechanism, 214 is a callback reservation registration mechanism, 215 is a callback reservation cancellation mechanism, 216 is a callback reservation mechanism, 217 is a busy call release monitoring mechanism, 218
501 is a callback execution mechanism, 501 is a reservation signal sending means,
502 is a reservation completion adding means, 601 is a requesting means, 602
603 is a reservation registration means, 603 is a reservation cancellation means, 701 is a reservation means, 701 is a release monitoring means, 703 is an implementation means, cb
is callback information, CBA is callback reservation completion signal, cba is callback reservation completion information, CBR is callback reservation signal, cbr is callback request information, N
a and Nb are subscriber numbers, Nas is subaddress, R
C (cba) is a release confirmation signal with callback reservation completion;
SUI (cb) is a callback calling signal, SU2
(cb) indicates a callback incoming signal, and 5UI (cbr) indicates a callback request signal. Minagaguchi month 1 J Roki 4L Tsumugi 4 Figure Zetaru fL coming coal heart 7chi type % type %

Claims (1)

[Claims] In a digital integrated communication network (500), a calling terminal (6
00) includes a request means (601) for adding a callback request to a calling signal and sending it to the digital integrated communication network (500), and the digital integrated communication network (500).
The receiving terminal (700) is provided with a reservation registration means (602) for setting a callback reservation registration state when a callback reservation completion and release confirmation signal is received from the terminal and rejecting any call settings other than callbacks thereafter. , the digital integrated communication network (5
When a callback reservation signal is received from 00), it is checked whether or not a callback can be reserved, and if it is determined that the call is in progress and can be reserved, the callback reservation state is set and the call is made to the digital integrated communication network (500). a reservation means (701) for transmitting a back reservation completion signal; a release monitoring means (702) for monitoring termination of a busy call when the callback reservation state is set; implementation means (703) for transmitting a callback call signal to the digital integrated communication network (500) and execute a callback when the termination of a medium call is detected;
500) receives the calling signal with the callback request added from the calling terminal (600), and sends the calling terminal (600) to the calling terminal (600).
700) is busy, a callback reservation signal is sent to the terminating terminal (700), and the terminating terminal (700)
), when the callback reservation completion signal is received from ), a callback reservation completion signal is added to a release confirmation signal and sent to the originating terminal (600).