JPH0837560A - Public-private connector - Google Patents

Abstract

PURPOSE:To prevent invalid charging concerning a public/private connection system for respectively connecting plural terminals through a public telephone line network and a private line. CONSTITUTION:Concerning a public/private connector 3 provided with an exchange part for connecting a call originating terminal 1 and a call incoming terminal 6 through a public telephone line network 2 and a private line 4 and equipped with a personal call incoming system as a connecting system at the time of call incoming from the public telephone line network, this device is further provided with a control part for stopping a connection response to the public telephone line network 2 and when the disability of communication through the private line 4 to the call incoming terminal 6 is detected. Therefore, when the opposite side terminal can not be connected by any reason such as a fault or busy state, it is not necessary to pay a call tariff.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a public-private connection system for connecting a public telephone network and a private line, and to a public-private connection device having a function of preventing invalid charging of the public telephone network and the private line.

[0002]

2. Description of the Related Art A conventional public connection system will be described with reference to FIGS. FIG. 6 is a diagram showing a schematic configuration of a conventional public exclusive connection system. In addition, FIG.
It is a figure which shows the sequence at the time of communication failure by the other party terminal busy of the conventional public exclusive connection system.

In FIG. 6, 1 is a terminal A (terminal for accommodating a public telephone network), 2 is a public telephone line network, 3 is a public exclusive connection device, 5
Is a private branch telephone exchange, 4 is a dedicated line for connecting the public exclusive connection device 3 and the private branch telephone exchange 5, and 6 is a terminal B (a partner's terminal).

Further, in FIG. 6, the public-private connection device 3 is
An interface (I / I connected to the public telephone line network 2
F) 31, an exchange unit 32, an interface (I / F) 33 connected to the dedicated line 4, and a control unit 34.

In FIG. 7, RBT is a ring back tone, and B. T is an abbreviation for busy tone.

In all the drawings, those having the same function are designated by the same reference numeral, and the repeated description thereof will be omitted.

In the conventional system, the additional number system in the dial-in system is used as the connection system between the public telephone line network 2 and the private line 4. The operation will be described with reference to FIG.

First, the caller dials the designated telephone number of the public telephone line network connection line owned by the public exclusive line connection device 3 to the public telephone line network 2 by using the terminal A1 (calling). The public telephone line network 2 calls (calls) the public-private connection device 3 by this dial. The public exclusive connection device 3 responds to the call and completes the connection with the public telephone line network 2. Then, the second dial tone is sent to the terminal A1.

After confirming the second dial tone, the caller dials a number (additional number) designating the partner terminal B6. The public-private connection device 3 determines that this number requests connection to the terminal B6 housed in the constituent telephone exchange 5, and calls the private telephone exchange 5 via the leased line 4. I do.

If the terminal B6 is busy, the private branch exchange 5 sends the B. Sends T (busy tone). The sender is B. After confirming T, the connection with the public telephone line network 2 is disconnected. Upon receiving the disconnection signal from the terminal A1, the public telephone line network 2 sends the B. Send T. The public-private connection device 3 is a B. When T is received, a line release signal is transmitted to terminate the connection with the public telephone line network 2.

[0011]

However, in the conventional public exclusive connection system as described above, when the connection fails as shown in FIG. Since the connection to the line network 2 is completed by the response from the public-private connection device 3, there is a problem that the public telephone line network 2 is charged from the response to the disconnection by the terminal A1 (invalid charge). It was

The term "invalid charging" as used herein means that no communication is performed between the terminal A1 and the terminal B6.
It means that the telephone fee is charged to the terminal A1.

It is an object of the present invention to obtain a public exclusive connection device capable of preventing invalid billing by not completing the connection with the public telephone line network 2 until the connection with the partner terminal B6 is completed. .

[0014]

A public-private connection device according to claim 1 of the present invention comprises a public-private connection device having a switching unit for connecting a calling terminal and a receiving terminal via a public telephone line network and a private line. In the above, a control unit is further provided for canceling the connection response to the public telephone line network when it is detected that the communication to the receiving terminal via the dedicated line is impossible.

According to a second aspect of the present invention, the public exclusive connection device is an individual incoming call system as a connection system when receiving an incoming call from the public telephone line network.

According to a third aspect of the present invention, the public-private connection device adopts a PBX dial-in system as a connection system when receiving a call from the public telephone line network.

[0017]

According to the public exclusive connection device according to claim 1 of the present invention, in the public exclusive connection device provided with the exchange section for connecting the calling terminal and the called terminal through the public telephone line network and the private line,
Since it further comprises a control unit that suspends the connection response to the public telephone line network when detecting the communication failure to the receiving terminal via the dedicated line, it is possible to prevent invalid billing, and it is possible to prevent the other terminal or the dedicated terminal. If the line cannot be connected due to a breakdown or a busy condition, it is not necessary to pay the telephone charge, and the service can be improved.

In the public-private connection device according to the second aspect of the present invention, invalid billing can be prevented even if the individual incoming call system is used as the connection system when receiving an incoming call from the public telephone line network.

In the public exclusive connection device according to claim 3 of the present invention, invalid billing can be prevented even if the PBX dial-in system is used as the connection system when receiving an incoming call from the public telephone line network.

[0020]

【Example】

Example 1. An embodiment of the present invention will be described below with reference to FIG. FIG. 1 is a diagram showing a call connection sequence for explaining an invalid charging prevention operation according to a first embodiment of the present invention. As a connection method with a public telephone line network, an individual incoming call method (DIL: direct in line) is shown.
The operation when the communication connection fails due to the busy state of the leased line by using the e) method. The configuration of the public-private connection device is shown in FIG.
The same as the conventional one, but has different functions as described below.

First, the caller dials the designated telephone number of the line connected to the public telephone line network owned by the public exclusive line connection device 3 to the public telephone line network 2 by using the terminal A1 (calling). The public telephone line network 2 is a terminal B6 through the private line 4 and the private branch exchange 5 by the individual incoming call system (DIL) among the lines of the public telephone line network accommodated by the public exclusive connection device 3 by this dial. Call the line connecting (call).

The public-private connection device 3 determines that the call to this line is an incoming call to the terminal B6 by the individual incoming call method, and confirms the status of the private line 4 which is a route to the terminal B6. . If the private line 4 is unavailable during all talk, the public-private connection device 3 detects that all the private line 4 is busy, and does not respond to the public telephone line network 2 and responds to the terminal B6. Stop the connection operation. Then, the connection sequence is ended by the disconnecting operation by the caller.

According to the first embodiment, no response operation is made to the public telephone line network 2 until the end of the connection sequence, so that the public telephone line network 2 does not charge the terminal A1. That is, it is possible to prevent invalid billing, and it is not necessary to pay a telephone charge when the other terminal or the leased line cannot be connected due to a breakdown or a busy state, so that the service can be improved.

Embodiment 2 FIG. A second embodiment of the present invention will be described with reference to FIG. FIG. 2 is a diagram showing a call connection sequence for explaining the operation of preventing invalid charging according to the second embodiment of the present invention, in which an individual incoming call method (DIL) is used as a connection method with a public telephone network, and a terminal is used. The operation when the communication connection fails due to B being busy is shown.

First, the caller dials the designated telephone number of the public telephone line network connection line owned by the public exclusive line connection device 3 to the public telephone line network 2 by using the terminal A1 (calling). The public telephone line network 2 is a terminal B6 through the private line 4 and the private branch exchange 5 by the individual incoming call system (DIL) among the lines of the public telephone line network accommodated by the public exclusive connection device 3 by this dial. Call the line connecting (call).

The public-private connection device 3 determines that the call to this line is an incoming call to the terminal B6 by the individual incoming call method, and makes a call to the dedicated line 4. When the private branch exchange 5 receives a call from the leased line 4 to the terminal B6,
Check the status of terminal B6. If the terminal B6 is busy and cannot be used, the private branch exchange 5 detects that the terminal B6 is busy and does not respond to an incoming call from the leased line 4,
A busy tone (BT) is sent to the public-private connection device 3.

B. The public exclusive connection device 3 that has received T stops the connection operation for the terminal B6 without performing the response operation for the public telephone line network 2. Then, the connection sequence is ended by the disconnecting operation by the caller.

According to the second embodiment, no response operation has occurred to the public telephone line network 2 until the end of the connection sequence, and therefore, the public telephone line network 2 does not charge the terminal A1. That is, it is possible to prevent invalid billing, and it is not necessary to pay a telephone charge when the other terminal or the leased line cannot be connected due to a breakdown or a busy state, so that the service can be improved.

Example 3. A third embodiment of the present invention will be described with reference to FIG. FIG. 3 is a diagram showing a call connection sequence for explaining an invalid charging prevention operation according to the third embodiment of the present invention, in which an individual incoming call method (DIL) is used as a connection method with a public telephone line network and a terminal is used. The operation when the communication connection fails due to a failure of B is shown.

First, the caller dials the designated telephone number of the public telephone line network connection line owned by the public exclusive line connection device 3 to the public telephone line network 2 by using the terminal A1 (calling). The public telephone line network 2 is a terminal B6 through the private line 4 and the private branch exchange 5 by the individual incoming call system (DIL) among the lines of the public telephone line network accommodated by the public exclusive connection device 3 by this dial. Call the line connecting (call).

The public-private connection device 3 determines that the call to this line is an incoming call to the terminal B6 by the individual incoming call method, and calls the dedicated line 4. When receiving a call from the private line 4 to the terminal B6, the private branch exchange 5 confirms the status of the terminal B6. If the terminal B6 fails and cannot be used, the private branch exchange 5 detects the failure of the terminal B6, does not respond to an incoming call from the leased line 4, and is busy with the public-private connection device 3. Sound (BT) is transmitted.

B. The public exclusive connection device 3 that has received T stops the connection operation for the terminal B6 without performing the response operation for the public telephone line network 2. Then, the connection sequence is ended by the disconnecting operation by the caller.

According to the third embodiment, no response operation is made to the public telephone line network 2 until the end of the connection sequence, so that the public telephone line network 2 does not charge the terminal A1. That is, it is possible to prevent invalid billing, and it is not necessary to pay a telephone charge when the other terminal or the leased line cannot be connected due to a breakdown or a busy state, so that the service can be improved.

Embodiment 4 FIG. A fourth embodiment of the present invention will be described with reference to FIG. FIG. 4 is a diagram showing a call connection sequence for explaining an invalid charge prevention operation according to the fourth embodiment of the present invention. As a connection method with a public telephone line network, a PBX dial-in method (DID: direct) is shown.
In dialing), the operation when the dedicated line 4 is in a busy state and communication connection fails.

First, the caller uses the terminal A1 to dial the designated telephone number of the public telephone line network connection line owned by the public exclusive line connection device 3 to the public telephone line network 2 (call origination). The public telephone line network 2 calls one of the lines connected by the PBX dial-in system (DID) among the lines of the public telephone line network accommodated in the public exclusive connection device 3 by this dial (calling). ).

The public-private connection device 3 detects a call and sends a primary response signal to the public telephone line network 2 when the preparation for receiving the extension designation number is completed. When the public telephone line network 2 receives the primary response signal, it sends the extension designation number to the public-private connection device 3. In the public-private connection device 3, this extension designation number is the terminal B6.
It is judged that the incoming call is to the terminal B6 and the status of the private line 4 which is the route to the terminal B6 is confirmed. At the same time, an extension designation reception completion signal is sent to the public telephone line network 2. If the private line 4 is unavailable during all talk, the public-private line connection device 3 detects that all the private line 4 is busy and does not respond to the public telephone line network 2 and responds to the terminal B6. Stop the connection operation. Then, the disconnection operation by the caller ends the connection sequence.

According to the fourth embodiment, no response operation is made to the public telephone line network 2 until the end of the connection sequence, and therefore, the public telephone line network 2 does not charge the terminal A1. That is, it is possible to prevent invalid billing, and it is not necessary to pay a telephone charge when the other terminal or the leased line cannot be connected due to a breakdown or a busy state, so that the service can be improved.

Embodiment 5 FIG. A fifth embodiment of the present invention will be described with reference to FIG. FIG. 5 is a diagram showing a call connection sequence for explaining an invalid charging prevention operation according to a fifth embodiment of the present invention, in which a PBX dial-in system (DID) is used as a connection system with a public telephone network. The operation when the communication connection fails due to the busy state of the terminal B is shown.

First, the caller dials the designated telephone number of the public telephone line network connection line owned by the public exclusive line connection device 3 to the public telephone line network 2 by using the terminal A1 (calling). The public telephone line network 2 calls one of the lines connected by the PBX dial-in system (DID) among the lines of the public telephone line network accommodated in the public exclusive connection device 3 by this dial (calling). ).

The public-private connection device 3 detects a call and sends a primary response signal to the public telephone line network 2 when the preparation for receiving the extension designation number is completed. When the public telephone line network 2 receives the primary response signal, it sends the extension designation number to the public-private connection device 3. The public-private connection device 3 determines that this extension designation number is an incoming call to the terminal B6, and makes a call to the dedicated line 4. At the same time, an extension designation reception completion signal is sent to the public telephone line network 2.

The private branch exchange 5 is connected from the leased line 4 to the terminal B6.
When the call to the terminal is received, the status of the terminal B6 is confirmed. If the terminal B6 is busy and cannot be used, the private branch exchange 5 detects that the terminal B6 is busy and does not respond to an incoming call from the leased line 4, but does not respond to the public-private connection device 3. Send a busy tone (BT).

B. The public exclusive connection device 3 that has received T stops the connection operation for the terminal B6 without performing the response operation for the public telephone line network 2. Then, the connection sequence is ended by the disconnecting operation by the caller.

According to the fifth embodiment, no response operation is made to the public telephone line network 2 until the end of the connection sequence, so that the public telephone line network 2 does not charge the terminal A1. That is, it is possible to prevent invalid billing, and it is not necessary to pay a telephone charge when the other terminal or the leased line cannot be connected due to a breakdown or a busy state, so that the service can be improved.

[0044]

As described above, the public-private connection device according to claim 1 of the present invention is a public-private connection provided with an exchange unit for connecting a calling terminal and a called terminal via a public telephone line network and a private line. Since the device further includes a control unit for stopping the connection response to the public telephone line network when detecting the communication failure to the receiving terminal via the leased line, it is possible to prevent invalid billing, and the other terminal Also, if the leased line cannot be connected due to a breakdown or a busy state, there is no need to pay a telephone charge, and the service can be improved.

As described above, the public-private connection device according to claim 2 of the present invention uses the individual call reception method as the connection method when receiving an incoming call from the public telephone line network. Can be prevented.

As described above, the public-private connection device according to claim 3 of the present invention uses the PBX dial-in system as the connection system when receiving an incoming call from the public telephone line network. Therefore, it is also invalid as the PBX dial-in system. Charges can be prevented.

[Brief description of drawings]

FIG. 1 is a call connection sequence diagram showing an operation of preventing invalid charging according to a first embodiment of the present invention.

FIG. 2 is a call connection sequence diagram showing an operation of preventing invalid charging according to the second embodiment of the present invention.

FIG. 3 is a call connection sequence diagram showing an operation of preventing invalid charging according to a third embodiment of the present invention.

FIG. 4 is a call connection sequence diagram showing an operation of preventing invalid charging according to a fourth embodiment of the present invention.

FIG. 5 is a call connection sequence diagram showing an operation of preventing invalid charging according to a fifth embodiment of the present invention.

FIG. 6 is a diagram showing a schematic configuration of a conventional public-private connection device and system.

FIG. 7 is a sequence diagram showing operations of a conventional public-private connection device and a system.

[Explanation of symbols]

1 terminal A, 2 public telephone network, 3 public exclusive connection device, 4
Private line, 5 private branch exchanges, 6 terminal B.

Claims (3)

[Claims] 1. A public-private connection device having a switching unit for connecting a calling terminal and a receiving terminal via a public telephone line network and a dedicated line, when it is detected that communication to the receiving terminal via the dedicated line is impossible. The public-private connection device further comprising a control unit for stopping the connection response to the public telephone line network. 2. The public-private connection device according to claim 1, wherein an individual incoming call system is provided as a connection system when receiving an incoming call from the public telephone line network. 3. The public-private connection device according to claim 1, wherein a PBX dial-in system is provided as a connection system when receiving an incoming call from the public telephone line network.