JPH06244960A - Busy state callback system - Google Patents

Abstract

PURPOSE:To call back a caller without intervention of the operator by connecting a public network and a private line. CONSTITUTION:When an extension telephone set 13-j of a public network calls an extension telephone set 14-i of a private branch of exchange 11-1 and the extension telephone set 14-i is busy and a caller makes operation of camp-on registration, the telephone number of the caller is registered in a queue section 17-i corresponding to the extension telephone set 14-i of a processing unit 12-1. When the talking of the extension telephone set 14-i is finished, the telephone number registered to a head of the queue section 17-i is read by a control section 19 and a nearby private branch of exchange 11-2 is indexed by a toll station number of the telephone number by a telephone number analysis section 18. Thus, the private branch of exchange 11-1 connects the telephone set 13-j indexed by the telephone number analysis section 18 and the nearby private branch of exchange 11-2 via a private line and connects the private branch of exchange 11-2 and the telephone set 13-j by a public network.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a busy call back system for calling a telephone set which receives an incoming call during a call.

[0002]

2. Description of the Related Art Conventionally, in a private branch exchange, a camp-on service has been realized which calls back a caller who was unable to make a call when the extension destination telephone was busy. There are camp-on and local camp-on.

The extension mutual camp-on means that when an extension telephone calls another extension telephone, if the caller performs a camp-on registration operation while the destination extension telephone is busy. This is a service in which when the telephone line becomes idle, one's own extension telephone is automatically called and the line is connected to the destination extension telephone.

Station line camp-on means that when a subscriber of the public network calls an extension telephone housed in a private branch exchange, an operator camps the caller when the extension telephone of the called party is busy. If you register on, the line is automatically connected when the extension telephone line becomes idle.

[0005]

However, the conventional mutual extension camp-on has a drawback in that both outgoing and incoming calls are limited to the internal extension, and the number of senders who can register the camp-on is limited to one.

[0006] Also, in the case of the camp-on camp-on, the operator needs to intervene in the camp-on registration, which increases the burden on the operator, and the caller who is camp-on registered is connected to the extension telephone of the other party. There was a drawback that you had to wait while talking until you were told.

An object of the present invention is to make it possible to call back an originator of a station line by utilizing a public line-dedicated line connection and without operator intervention.

[0008]

FIG. 1 is a block diagram showing the principle of the present invention. The present invention is a plurality of private branch exchanges 1-1, 1-2,
..1-n are connected by dedicated lines, and private branch exchanges 1-1,
Extension telephones 2-1, 2-2, ... 2-n accommodated in 1-2, ... 1-n
The present invention relates to an exchange system capable of dialing in from telephones 3-1, 3-2, ... 3-n accommodated in a public network.

Transmission of voice by connecting a public network and a leased line is currently prohibited, but is likely to be permitted in the near future. Therefore, according to the present invention, when the connection between the public network and the dedicated line becomes possible, the caller who has registered the camp-on is called back using the public-dedicated connection.

The outgoing call information analysis means 4 analyzes outgoing call information sent from the telephone set 3-j of the caller of the public network. The telephone number storage means 5 stores the telephone number of the caller when the extension telephone 2-i designated as the destination by the call information is in a call and the caller performs a camp-on registration operation. To do.

The telephone number analysis means 6 stores the telephone number storage means 5 when the telephone call of the extension telephone 2-i having the incoming call is finished.
From the telephone number corresponding to the extension telephone set 2-i stored in, the nearest private branch exchange 1- of the telephone number 3-j of that telephone number is stored.
Figure out k.

Each private branch exchange 1-1, 1-2, ... 1-n is provided with a processing device 7 having the transmission information analysis means 4, the telephone number storage means 5 and the telephone number analysis means 6. Extension phone
When the call of 2-i is completed, the telephone 3-j accommodated in the public network and the extension telephone 2-i are connected via the private branch exchange 1-k determined by the telephone number analysis means 6. Call back method during busy.

[0013]

[Function] Now, the telephone 3-j accommodated in the public network calls the extension telephone 2-i accommodated in the private branch exchange 1-i, the extension telephone is busy, and the caller performs cap-on registration. It is assumed that the code etc. has been entered.

Then, the outgoing call information analysis means 4 analyzes the outgoing call information inputted by the sender, and if it is recognized as the camp-on registration code, the telephone number sent as the outgoing call information or the caller's input. The telephone number to be recalled is stored in the telephone number storage means 5 as the call back destination telephone number.

When the call of the extension telephone 2-i is terminated and a call termination notice is sent from the private branch exchange 1-i to the processing unit 7, the telephone number analysis means 6 causes the telephone number storage means 5 to call the corresponding telephone. The number, that is, the telephone number registered as camp-on for the extension telephone 2-i is analyzed and the private branch exchange 1-k closest to the telephone number is calculated.

When the nearest private branch exchange 1-k to be called back is found, the private branch exchange 1-i accommodating the extension telephone 2-i calls the telephone 3-j on its nearest private branch exchange 1-k. To connect.

As a result, the private branch exchange 1-i and the nearest private branch exchange 1-k to which the call is returned are connected by a dedicated line, and the private branch exchange 1-k and the call-back telephone 3-j are connected. Since it is connected via the public network, call charges can be saved.

Further, in the present invention, the telephone number storage means 5
Since it is possible to store the telephone numbers of a plurality of callers in the order of registration, it is possible to call back a plurality of callers in sequence without the intervention of an operator.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 shows a private branch exchange 11-1, 1 according to an embodiment of the present invention.
2 is a block diagram showing a configuration of a processing device 12 connected to 1-2 and a private branch exchange 11-1. FIG.

Private branch exchanges 11-1 and 11-2 are connected to each other by a dedicated line, and private branch exchanges 11-1 and 11-2 are connected to a public network. The public network accommodates a plurality of telephones 13-1, 13-2, ... 13n, and the private branch exchange 11-1 has a plurality of extension telephones.
14-1, 14-2 ... 14-n are housed. The private branch exchanges (PBX) 11-1 and 11-2 enable subscribers of the public network to dial in and call any extension telephones designated in advance in the private branch exchanges 11-1 and 11-2. ing.

The private branch exchange 11-1 is connected to a processing unit 12-1 for storing the telephone number of a caller who has registered for camp-on. Although FIG. 2 shows only the configuration of the processing device 12-1 connected to the private branch exchange 11-1, similar processing devices are also connected to the other private branch exchange 11-2.

The processing unit 12-1 includes a PB signal analysis unit 15 for analyzing outgoing information sent via the exchange containing the caller's telephone, such as a PB signal of a touch-tone telephone, and a camp. When the voice generation unit 16 that generates a voice message for instructing the on-registration operation and the extension telephone that received the call are in a call and the caller performs the camp-on registration operation, enter the telephone number of the caller. A queue unit (telephone number storage unit 5) 17 to be stored, a telephone number analysis unit 18 that analyzes the telephone number of a caller registered in camp-on to determine the nearest private branch exchange, and a private branch exchange 11-1. Receive incoming call notification / end call notification between
The control unit 19 is configured to make a connection request and control each unit of the PB signal analysis unit 15, the voice generation unit 16, the queue unit 17, and the telephone number analysis unit 18.

The queuing unit 17 is an extension telephone 14-1 or 14-2 that can be called by dialing in the private branch exchange 11-1.
... Multiple queue units 17-1, 17-2 corresponding to 14-n
..Consisting of 17-n, each queue 17-1, 17-2 ... 17-n
In, the telephone numbers registered for camp-on are stored in the order of registration.

Next, FIG. 3 shows a private branch exchange 11- shown in FIG.
FIG. 1 is a block diagram of an exchange system when 1 and 11-2 are respectively arranged in Tokyo and Osaka. Private branch exchanges 11-1 and 11-2 are connected to a public network and private branch exchanges 11-1 and 11-2 are connected. The lines are connected by dedicated lines.

Processing devices 12-1 and 12-2 are connected to the private branch exchanges 11-1 and 11-2, respectively.
11-1, 11-2 are multiple extension telephones 14-1 to 14-n, 14'-1.
Contains 14'-n.

Next, in the exchange system configured as described above, the processing operation when the extension telephone 14-i of the private branch exchange 11-1 is called by dial-in from the telephone 13-j of the public network will be described in the sequence of FIG. It will be described with reference to the drawings.

The control unit 19 of each of the processing devices 12-1 and 12-2 notifies the control unit 19 when an incoming call is received during a call of a specific extension telephone or when the extension telephone becomes idle. In this way, the private branch exchanges 11-1 and 11-2 are instructed to perform the initial setting (FIG. 4, processing (1)).

The telephone 13 accommodated in the public network
When -j calls the extension telephone 14-i in a call by dialing in, the private branch exchange 11-1 issues an incoming call notification to the control unit 19 according to the above-described initial setting (processing (2)). When the telephone set 13-j calls the extension telephone set 14-i, the extension telephone set 14-i of the private branch exchange 11-1 may be called via a private line via the nearest private branch exchange 11-2.

When the control unit 19 receives the incoming call notification, it sends a connection request to the private branch exchange 11-1 to send it to the telephone set 13-j.
And the processing unit 12-1 are requested to be connected. Upon receiving this connection request, the private branch exchange 11-1 sets up a line to the telephone set 13-j which is the caller (process (3)).

When the connection between the calling telephone 13-j and the processing unit 12-1 is completed, the control unit 19 instructs the voice generation unit 16 to "wait for the nth call. Enter the registration code and your own telephone number with the PB signal. "(Processing
(Four)).

A camp-on (callback) registration code and a telephone number are input in response to this voice guidance (processing (5)), and the PB signal analysis unit 15 analyzes the input PB signal and camps on. If it is recognized as the registration code, the telephone number obtained by analyzing the subsequent PB signal is notified to the control unit 19 as the source telephone number (process (6)). When the private branch exchange 11-1 notifies the processing device 12-1 of the telephone number of the caller as the call information, the caller need only enter the registration code for the camp-on registration.

When the control unit 19 receives the telephone number of the caller from the PB signal analysis unit 15, the control unit 19 places the telephone number in the queue 17-i corresponding to the extension telephone set 14-i that has received the call in the queue unit 17. Register (Process (7)).

When the camp-on registration is completed in this way, the control unit 19 outputs a line disconnection request to the private branch exchange 11-1, and the private branch exchange 11-1 disconnects the line.
(Treatment (8)).

When the extension telephone 14-i is receiving a call from another telephone and an instruction for camp-on registration is given while the extension telephone 14-i is in a call, the above-mentioned processes (2) to (8) are repeated and the caller is called. Telephone numbers of are sequentially stored in the queue unit 17-i.

On the other hand, when the telephone call of the extension telephone set 14-i is finished, a telephone call end notice is output from the private branch exchange 11-1 to the control unit 19 of the processing unit 12-1 (processing (9)). Upon receiving the call end notification, the control unit 19 extracts the telephone number registered at the head of the queue unit 17-i corresponding to the extension telephone 14-i (processing (10)) and calls the analysis of the telephone number. Number analysis unit 1
8 is instructed (process (11)). In this case, the queue section 17-i
Retrieves the telephone number of the telephone 13-j that first registered for camp-on.

The telephone number analysis unit 18 determines a private branch exchange closest to the telephone having the telephone number, that is, a private branch exchange having the lowest call charge from the telephone numbers taken out from the queue unit 17-i, and analyzes the analysis result. The data is output to the control unit 19 (process (12)). In this case, since the nearest private branch exchange of the telephone 13-j that has registered for camp-on is the private branch exchange 11-2 in Osaka, information designating the private branch exchange 11-2 is output to the control unit 19.

Now, the process in which the telephone number analysis unit 18 determines the nearest private branch exchange from the telephone numbers registered in camp-on will be described with reference to the chart of FIG. 5 and the flowchart of FIG.

FIG. 5 is a table showing the numbers of the private branch exchanges corresponding to the area code. By searching the table of FIG. 5 with the area code of the caller who registered the camp-on, it is possible to find the nearest private branch exchange, that is, the private branch exchange having the lowest call charge to the caller's telephone.

First, the telephone number analysis unit 18 includes a control unit 19
The telephone number notified from is stored (step S in FIG. 6).
1) Next, the area codes in FIG. 5 are sequentially taken out, and it is checked whether or not the stored phone number, that is, the area code of the originator registered in camp-on, matches (step S).
2).

Then, it is judged whether all the area codes match (step S3), and when the numbers do not match,
The process proceeds to step S4, the next area code is taken out, and the processing from step S2 onward is repeated.

On the other hand, if the area code numbers match in the determination in step S3, the flow advances to step S5 to notify the control section 19 of the number of the private branch exchange corresponding to the matched area code numbers.
Returning to FIG. 4, the private branch exchange 11-2 closest to the originating telephone set
If it is found, the control unit 19 transmits a call request for the telephone set 13-j to the processing unit 12-2 of the nearest private branch exchange 11-2 via the leased line (processing (13)). Private branch exchange 11-2
In response to a call request from the private branch exchange 11-1, call the telephone set 13-j via the public network (process (14)).

Next, the control unit 19 on the side of the processing device 12-1 requests the private branch exchange 11-1 to connect the extension telephone 14-i and the telephone 13-j registered for camp-on (processing (15 )).
The private branch exchange 11-1 answers the connection request from the control unit 19,
When the extension telephone 14-i is called and the extension telephone 14-i responds, the extension telephone 14-i and the telephone 13-j are connected via the leased line, the private branch exchange 11-2 and the public network (process ( 16))
.

When the call between the extension telephone set 14-i and the telephone set 13-j is completed, the private branch exchange 11-1 to the control unit 1
If a call end notification is sent to 9 and another telephone number is registered in the queue 17-i corresponding to the extension telephone 14-i, the above-mentioned processing is repeated and the next caller is called back. Be done.

In the above embodiment, when the extension telephone of the other party who wants to make a call is busy, the caller performs a camp-on registration operation to register the caller's telephone number in the queue unit 17. The telephones registered in the queue unit 17 are automatically returned in the order of registration when the extension telephone call ends.

Therefore, even when a plurality of persons receive an incoming call to the same extension telephone, all the incoming callers can be called back in order. When calling back a caller who has registered for camp-on, the call between the private branch exchange accommodating the extension telephone that received the call and the caller via the nearest private branch exchange connected by a leased line Since the line is connected, the call charge can be saved.

In the above embodiment, the PB signal analysis unit 15, the queuing unit 17 and the like are provided in a processing device different from the private branch exchange, but these functions may be provided in the private branch exchange. Further, the storage of the telephone number of the caller who has made the camp-on registration is not limited to the queuing unit 17, but may be of another configuration.

[0047]

According to the present invention, even when a plurality of persons receive an incoming call to the same extension telephone, those callers can be camp-on registered without intervention of an operator,
At the end of the call, the callers can be called back in sequence. Furthermore, the caller can be called back via the private branch exchange that is connected to the private branch exchange that accommodates the extension telephone and the private line, so that both parties can call at the lowest call rate. be able to.

[Brief description of drawings]

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

FIG. 2 is a block diagram showing a configuration of a private branch exchange and a processing device according to an embodiment.

FIG. 3 is a configuration diagram of a network in which a plurality of private branch exchanges of the embodiment are connected.

FIG. 4 is a sequence diagram illustrating the processing operation of the embodiment.

FIG. 5 is a diagram showing a private branch exchange number corresponding to an area code.

FIG. 6 is a flowchart showing the processing contents of a telephone number analysis unit.

[Explanation of symbols]

 1-1 to 1-n Private branch exchange 2-1 to 2-n Extension telephone 3-1 to 3-n Telephone 4 Calling information analysis means 5 Telephone number storage means 6 Telephone number analysis means 7 Processing device

Claims (3)

[Claims] 1. A plurality of private branch exchanges (1-1,1-2 ..1-n) are connected by a dedicated line, and the private branch exchanges (1-1,1-2 ..1-
dial the extension telephones (2-1, 2-2, ... 2-n) accommodated in (n) from the telephones (3-1, 3-2, ... 3-n) accommodated in the public network. In an exchange system that can be called by an IN, a calling information analysis means (4) for analyzing calling information sent from a telephone (3-j) of a caller of a public network, and a calling destination specified by the calling information. A telephone number storage means (5) for storing the telephone number of the caller when the extension telephone (2-i) is in a call and the caller performs a camp-on registration operation, and the extension telephone (2 -When the call of i) is completed, the extension telephone (2- that is stored in the telephone number storage means (5) is stored.
From the telephone number corresponding to i), the telephone of the telephone number (3-j)
A processing unit (7) having a telephone number analyzing means (6) for finding the nearest private branch exchange (1-k) of each private branch exchange (1-
1,1-2 ··· 1-n), and when the telephone call of the extension telephone (2-i) ends, the nearest private branch exchange (1-) analyzed by the telephone number analysis means (6)
A call-back system for busy calls, characterized in that the telephone set (3-j) and the extension telephone set (2-i) are connected via k). 2. The call back system according to claim 1, wherein the telephone number storage means (5) comprises a queuing unit for storing the telephone numbers of callers who are registered as camp-on in the order of registration. The number analysis means (6) finds the nearest private branch exchange (1-k) of the telephone number corresponding to the extension telephone (2-i) registered in the queue, and busy When the call of the extension telephone (2-i) that was
The private branch exchange (1-k) and the telephone (3) are connected via a private line between the nearest private branch exchange (1-k) analyzed by the telephone number analyzing means (6) and the extension telephone (2-i). -J) Call-back system, which is characterized by connecting to j) via a public network. 3. The busy call back system according to claim 2, wherein said call origination information analyzing means (4) is connected to at least its own private branch exchange (1-i) via another dedicated private branch exchange. Analyzes the outgoing information sent from the caller's telephone of the office line that has passed through, and when the extension telephone (2-i) that was busy ends the call,
The private branch exchange (1-k) and the telephone (3) are connected via a private line between the nearest private branch exchange (1-k) analyzed by the telephone number analyzing means (6) and the extension telephone (2-i). -J) Call-back system, which is characterized by connecting to j) via a public network.