JPH06253030A - Data transmitter - Google Patents

Abstract

PURPOSE:To automatically identify a case that a call back is operated from the case that data communication is operated without operating the call back without registration and management of a large amount of telephone number at a reception side for the call back operation. CONSTITUTION:After an automatic incoming call, a telephone number information receiving function part 11 receives the telephone number information from a transmission side, and temporarily stores it. After line disconnection, a call back control part 13 operates the call back by using the telephone number. Therefore, the registration and management of the telephone number is not necessitated at the reception side. Also, only when the telephone number information is received, and a call back request is received within a fixed time after the automatic incoming call, the call back is operated. Thus, when the call back is not necessitated, normal data communicating state can be automatically obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data transmission device for performing data communication between data terminals connected via a telephone line.

[0002]

2. Description of the Related Art In computer networks and other large-scale information management systems, public networks such as telephone lines are often used for transmitting and receiving data. In such data transmission / reception, it is required to confirm the other party with each other and perform reliable processing so as to prevent erroneous transmission. For this,
For example, a callback function is provided in the data transmission device.

FIG. 2 is a block diagram showing a conventional data transmission device. This device is connected to the telephone line 1 and is used by the data terminal 2 to transmit and receive data. A network control unit 3, a modulation / demodulation unit 4, and a data terminal interface unit 5 are connected between the telephone line 1 and the data terminal 2. Further, a control unit 6 is provided to control these, and the control unit 6 is provided with an incoming call control unit 7 and a callback control unit 8. Further, a telephone number registration unit 9 is connected to the control unit 6, and a registration area 9A in which a telephone number of a communication partner is registered in advance is provided here. The network control unit 3, the modulation / demodulation unit 4, the data terminal interface unit 5, and the like are circuit blocks widely used in general modems. The control unit 6 is composed of a processor or the like for controlling these. The incoming call control unit 7 controls the automatic incoming call, and the callback control unit 8
Is a part for controlling the callback operation. The telephone number registration unit 9 is composed of a storage unit that stores in advance the telephone number of the data terminal to be transmitted and received.

The above device operates as follows. First,
When an incoming call is received through the telephone line 1, the incoming call control unit 7 of the control unit 6 controls the network control unit 3 and the modulation / demodulation unit 4 to make an automatic incoming call. Callback control means that when a line is connected to send and receive data, it confirms the other party, disconnects the line once, calls the other party from the receiving side, reconnects the line, and reconnects the same party. This is a method of starting data communication after confirming that As a result, the transmission / reception partner is automatically confirmed and communication security is maintained. It is also used for the purpose of paying the line usage fee for data communication on the receiving side.

When a callback operation is performed, certain identification information is sent from the sender after such an automatic incoming call. This identification information is information that specifies one of the registration areas 9A of the telephone number registration unit 9. The callback controller 8 reads the telephone number from the registration area 9A according to this identification information. Also, the callback controller 8
Controls the modem unit 4 and the network control unit 3 to disconnect the line once. After that, the telephone number read from the telephone number registration unit 9 is used to control the modulation / demodulation unit 4 and the network control unit 3 to automatically make a call. This will call the sender again,
Data communication is started after confirmation of the other party.

[0006]

By the way, the above-mentioned conventional apparatus has the following problems to be solved. First, when performing callback control as described above,
It is necessary to store the telephone number of the other party in advance in the registration area 9A of the telephone number registration unit 9. Therefore, when a call back is required for a large number of parties, the telephone number registration section 9 must be a large capacity memory.
Therefore, there is a problem that the hardware cost rises and the management of the stored contents becomes complicated. In addition, there is communication that does not necessarily require callback control, but the data transmission device cannot automatically identify this. In this case, there is also a problem that the telephone charge cost on the receiving side is increased by always making a callback.

The present invention has been made by paying attention to the above points, and does not require a large amount of telephone number registration management on the receiving side, and it may or may not be called back and data communication is performed without calling back. It is an object of the present invention to provide a data transmission device capable of automatically identifying

[0008]

The first aspect of the present invention is to provide a call control section for automatically receiving a call when a call is received through a telephone line, and a telephone for receiving telephone number information transmitted from a transmitting side. A number information receiving function section, a telephone number information storage section for temporarily storing the telephone number information, and a call for automatically calling the sender by reading the telephone number from the telephone number information storage section after disconnecting the line. The present invention relates to a data transmission device including a back control unit.

According to a second aspect of the present invention, in the above device, a callback request receiving function unit for receiving the callback request information transmitted from the transmitting side, a monitoring timer for measuring a fixed time from an automatic incoming call, and within the fixed time. When the call back request information is received, the call back control unit is operated after disconnecting the line, and when the call back request information is not received within the fixed time, the operation state control unit that maintains the data communication state thereafter is used. It is characterized by having.

According to a third aspect of the present invention, in the above device, a callback request receiving function section for receiving the callback request information transmitted from the transmitting side, and a password transmission request to the transmitting side when the callback request information is received. When a password is received from the sender and the password requesting part, the line is checked against the registered password. If the passwords do not match, the line is disconnected.If the passwords match, the line is disconnected and the call is made. An operation state control unit for operating the back control unit is provided.

According to a fourth aspect of the present invention, in the above device, a callback request receiving function unit for receiving the callback request information transmitted from the transmitting side and a password transmission request to the transmitting side when the callback request information is received. When you receive a password from the password request part and the sender,
It is provided with an operation state control unit for operating the callback control unit after disconnecting the line when the passwords match with the previously registered password and disconnecting the line when the passwords do not match, and for maintaining the data communication state thereafter. It is characterized by that.

[0012]

In this device, after the automatic incoming call, the telephone number information receiving function unit receives the telephone number information from the transmitting side and temporarily stores it. After disconnecting the line, the call back control section calls back using the telephone number. Therefore, the receiving side does not need to manage the registration of the telephone number. In addition, when the call back request is received within a certain time after the automatic incoming call along with the reception of the telephone number information, if the call back is unnecessary, the normal data communication state is automatically established. You can move to. Security is enhanced by requesting a password from the sender when a callback request is made and making a callback only if this is matched. Is there no callback request?
Alternatively, if the password is not correctly received, it is possible to shift to a normal data communication state and distinguish between callback control and control to a normal reception state.

[0013]

The present invention will be described in detail below with reference to the embodiments shown in the drawings. FIG. 1 is a block diagram showing an embodiment of a data transmission device of the first invention. The device shown in the figure is for the data terminal 2 to transmit / receive data to / from another data terminal via the telephone line 1. As in the conventional device, the network controller 3, the modulator / demodulator 4 and the data terminal interface 5 are connected. I have it. A control unit 10 is provided to control these, and an incoming call control unit 7, a telephone number information receiving function unit 11, a telephone number information storage unit 12, and a callback control unit 13 are provided therein. The incoming call control unit 7 is a unit for controlling the network control unit 3 and the modulation / demodulation unit 4 to make an automatic incoming call, as in the conventional device.

The telephone number information receiving function section 11 is newly provided in the present invention, and receives telephone number information sent from the transmitting side through the telephone line 1 to perform callback control, and makes a call. This is a part for performing an operation of storing the number information storage unit 12. Telephone number information storage unit 12
Is not a conventional large-capacity memory for storing a telephone number, but a memory having a capacity capable of temporarily storing one telephone number of a party connected to a line.
The callback control unit 13 is a unit that executes a certain process for disconnecting the line and performing the callback.

The device having the above structure operates as follows.
First, when there is an incoming call through the telephone line 1, the incoming call control unit 7
Controls the network control unit 3 and the modulation / demodulation unit 4 to automatically make an incoming call. Next, the telephone number information sent from the transmitting side is received by the telephone number information receiving function unit 11, and this is temporarily stored in the telephone number information storage unit 12. The callback controller 13 then controls the modulator / demodulator 4 and the network controller 3 to disconnect the line. Then, the telephone number is read from the telephone number information storage unit 12, and the telephone number is used to modulate / demodulate unit 4
Also, the automatic transmission by the network control unit 3 is controlled. As a result, the same data terminal on the sending side is called again and data communication is started.

For the above operation, the device of the present invention need only be equipped with a small capacity memory for storing one telephone number, and it is not necessary to manage a large number of telephone numbers. In addition, since the data communication is started after the telephone number information is received from the other party and a call back is made to the clearly defined target, it is possible to ensure security.

FIG. 3 shows a block diagram of a data transmission device of the second invention. This device is different from the first invention in the configuration of the control unit 20. That is, the control unit 20 of this device includes an incoming call control unit 7, a telephone number information reception function unit 11, a telephone number information storage unit 12, a callback request reception function unit 21, a monitoring timer 22, an operation state control unit 23, and a call. Back control unit 1
3 is provided. The configuration of the incoming call control unit 7, the telephone number information receiving function unit 11 and the telephone number information storage unit 12 is as shown in FIG.
It is similar to the device of the first invention shown in FIG.

The callback request receiving function section 21 is newly provided in the second invention, and is a section for receiving a callback request sent from the transmitting side. That is,
In the second invention, the callback control is performed only when there is a callback request from the other party. Its purpose is
This is because it is automatically performed to distinguish between the data communication for which callback control is performed and the data communication for which normal callback processing is not performed. The monitoring timer 22 is
A decision to set a certain time from the automatic incoming call, and if the callback request is accepted from the sender within this time, perform the callback operation, and in other cases, decide not to perform the callback operation. It is provided for the purpose of The operation state control unit 23 is a unit that performs control for switching the operation of the device depending on whether the monitoring timer 22 has timed out or not.

FIG. 4 shows an operation flowchart of the apparatus of the second invention. First, in the above device, when an automatic incoming call is made in step S1, it is determined in step S2 whether or not a callback request is received. If no callback request has been received, step S3.
Then, the monitoring timer 22 is checked to determine whether the time is up. Here, if it is determined that the time is within the fixed time set in the monitoring timer 22, the process returns to step S2, and the determination as to whether the callback request is received is repeated for the fixed time. If a call back request is received, the process proceeds to step S4, the telephone number information is received, the line is disconnected in step S5, and the call back control unit 13 in step S6.
The operation of starts. As a result, the callback control unit 13 reads the telephone number from the telephone number information storage unit 12 and performs automatic call control, as described in the first aspect of the invention.

On the other hand, if it is determined in step S3 that the monitoring timer 22 has timed out, the process proceeds to step S7, and the data communication state is maintained. As a result, data communication without callback is started. With the above configuration, whether or not the callback control is automatically performed depending on the presence or absence of the callback request from the sender,
It is possible to select the operation to shift to the data communication state without callback control.

FIG. 5 shows a block diagram of a data transmission device according to the third and fourth aspects of the invention. In the third and fourth inventions, the device configuration as shown in this figure is adopted. This configuration is different from the device in FIG. 1 in the control unit 30. First,
The control unit 30 includes an incoming call control unit 7, a telephone number information reception function unit 11, a telephone number information storage unit 12, a callback request reception function unit 21, a password request unit 31, a password storage unit 32, and an operation state control unit 33. Also, a callback controller 13 is provided. The configurations of the incoming call control unit 7, the telephone number information reception function unit 11, the telephone number information storage unit 12, and the callback request reception function unit 21 are the same as those of the device of the second invention already described with reference to FIG.

Here, in the devices of the third and fourth aspects of the invention, the password request section 31 and the password storage section 32 are provided.
Is newly established. The password request unit 31 is a part that requests the sender to send a password after receiving an automatic incoming call and a callback request. Password storage 32
Is a part for storing a preset password. When the sender sends the password in response to the request, the password request unit 31 compares the password with the password stored in the password storage unit 32, and outputs the result of the verification to the operation state control unit 33. It is configured to do. The operation state control unit 33 is a unit that performs callback control when the passwords match, and does not perform callback control otherwise.

In the third invention, the line is automatically disconnected when the callback control is not performed, and in the fourth invention, the control is performed to shift to the normal data communication state when the password is not sent. Has been done. That is, the third invention is intended to enhance the security of the callback control by the password, and the fourth invention is intended to automatically discriminate the case where the callback control is required and the case where the callback control is not required.

FIG. 6 shows an operation flowchart of the device of the third invention. In this figure, the operation of the incoming call control unit 7 is the same as that of the first invention or the second invention already described, and therefore the description thereof is omitted. First, in step S1, it is determined whether a callback request has been received. If the callback request has not been received, the process moves to step S2, the monitoring timer 22 is checked, and it is determined whether the time is up. Here, if it is determined that the time is within the fixed time set in the monitoring timer 22, the process proceeds to step S1 again, and the determination of whether the callback request is received is repeated for the fixed time. If a callback request is received, a password transmission request is made in step S3. When the password is accepted from the sender, the password request unit 31 shown in FIG. 5 collates the password with the password stored in the password storage unit 32, and determines in step S4 whether the correct password is received. When the correct password is received, the process proceeds to step S5 to receive the telephone number information and disconnect the line. Then, the callback control unit 13 starts to operate in step S7 under the control of the operation state control unit 33. On the other hand, step S2
When it is determined that the monitoring timer 22 has timed out in step S8, the process proceeds to step S8 and the data communication state is entered. If the correct password is not received in step S4, the process proceeds to step S6 and the line is disconnected.

FIG. 7 shows an operation flowchart of the apparatus of the fourth invention. The fourth invention makes the operations of steps S1 to S5 the same as those of the device of the third invention shown in FIG. However, if the password is not received in step S4, the process proceeds to step S8 and the data communication state is entered. Therefore, in this case, if the callback control is not performed, a normal data communication state is set, and data transmission / reception that does not particularly require security can be performed.

The present invention is not limited to the above embodiments. Each functional block of the control unit may be provided independently or integrally. The telephone number information receiving function unit, the monitoring timer, the call back request receiving function unit, the password request unit, etc. may be freely combined and used, and the operation sequence thereof may be reversed as long as the object of the present invention is met. Further, the telephone number information may include not only the telephone number but also other information. Further, the telephone line may be any communication line that identifies the other party by the telephone number, and includes various communication networks such as a facsimile line and an ISDN line.

[0027]

According to the data transmission apparatus of the present invention described above, the telephone number information received from the transmitting side is received by the telephone number information receiving function section, this is temporarily stored, the line is disconnected, and then the telephone number is stored. Since information is used and automatic transmission is made to the transmitting side, it is not necessary for the receiving side to store and manage a large number of telephone numbers of the other party for which callback control should be performed.

Further, by providing a callback request receiving function unit for monitoring whether or not the callback request information is received from the transmitting side and a monitoring timer, callback control is performed when a callback request is made, and a call is made. When there is no back request, the normal data communication state can be maintained. Therefore, it becomes possible to automatically select these operating states.

Further, when a callback request is made, the security of the callback control can be enhanced by verifying the password. Further, if the normal data communication state is maintained when the password is not sent or the passwords do not match, it is possible to automatically select the callback function and the normal communication state.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a data transmission device of the first invention.

FIG. 2 is a block diagram of a conventional data transmission device.

FIG. 3 is a block diagram of a data transmission device of a second invention.

FIG. 4 is an operation flowchart of the device of the second invention.

FIG. 5 is a block diagram of a data transmission device according to third and fourth inventions.

FIG. 6 is an operation flowchart of the device of the third invention.

FIG. 7 is an operation flowchart of the device of the fourth invention.

[Explanation of symbols]

 1 Telephone line 2 Data terminal 7 Incoming call control section 11 Telephone number information receiving function section 12 Telephone number information storage section 13 Callback control section

Claims (4)

[Claims] 1. An incoming call control unit for automatically receiving an incoming call through a telephone line, a telephone number information receiving function unit for receiving telephone number information transmitted from a transmitting side, and the telephone number information A telephone number information storage section for temporary storage and a callback control section for reading the telephone number from the telephone number information storage section after disconnecting the line and automatically making a call to the transmission side are provided. Data transmission equipment. 2. A callback request receiving function unit for receiving callback request information transmitted from a transmitting side, a monitoring timer for measuring a fixed time from an automatic incoming call, and a callback request information received within the fixed time. In this case, the call-back control unit is operated after disconnecting the line, and when the call-back request information is not received within the fixed time, the operation state control unit maintains the data communication state thereafter. The data transmission device according to claim 1. 3. A callback request receiving function unit for receiving the callback request information transmitted from the transmitting side, a password requesting unit for requesting a password transmission to the transmitting side when the callback request information is received, and a transmission. When the password is received from the other side, it is checked against the pre-registered password. If the passwords do not match, the line is disconnected. If the passwords match, the call-back control unit operates after disconnecting the line. The data transmission device according to claim 2, further comprising a control unit. 4. A callback request receiving function unit for receiving the callback request information transmitted from the transmitting side, a password requesting unit for making a password transmission request to the transmitting side when the callback request information is received, and a transmission. When the password is received from the other side, it is checked against the password registered in advance, and if the passwords match,
3. An operation state control unit for operating the callback control unit after disconnecting the line and for maintaining the data communication state thereafter when the passwords do not match.
The described data transmission device.