JPH0443463B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an automatic transmission control device that is provided with an automatic transmission device and a terminal device so as to be able to send and receive communication data to and from a partner terminal.

[Conventional technology]

An example of the configuration of a conventional device of this type is shown in FIG. In the figure, 1 is a telephone subscriber line, 2 is an automatic dialing device, 3 is a line control unit, 4 is a dial control unit, and 5
is a communication signal line, 6 is a dial signal line, and 7 is a terminal device, which is composed of a modem 8, a communication interface section 9, an automatic call interface section 10, a control section 11, and an input/output section 12. There is.

Next, the operation of the automatic transmission control device having the above configuration will be explained. Conventionally, between a terminal device 7 (for example, a videotex user terminal) and an automatic dialing device 2, an automatic dialing signal is inputted from an input/output section 12, and a dialing signal is input from an automatic dialing interface section 10 by a control section 11. Based on this, the dial control unit 4 controls the line control unit 3 to connect the telephone subscriber line 1.
(off-hook state). As a result of this call, the line control unit 3 receives a dial tone [call ready signal: DT (Dial Tone)] from the telephone subscriber line 1. Thereafter, the telephone number of the other party (for example, A, B, C, D) inputted to the input/output section 12 and transferred to the dialing control section 4 via the control section 11 and the automatic dialing interface 10 in the above-mentioned operation. It is converted into a dial signal in the dial control unit 4,
It is sent to the telephone subscriber line 1 via the line control section 3. When the other party responds, a response signal is received by the line control section 3, passes through the dial control section 4, and further reaches the input/output section 12 via the automatic calling interface 10 and the control section 11, and displays that the other party has responded. do. After responding, the other party's terminal (not shown) starts transmitting the carrier, and when the modem 8 receives the carrier, it also starts transmitting the carrier. Subsequent communication will be performed via the modem 8, and if transmission data is input from the input/output unit 12, this communication data will reach the modem 8 via the control unit 11 and the communication interface unit 9, and will be sent to the modem. 8 carrier is modulated and the transmission data is sent. Received data is also transferred and received in the opposite direction to the above.

[Problem that the invention seeks to solve]

As described above, the conventional automatic call control device transfers the telephone number of the other party between the terminal device 7 and the automatic caller 2, and sends a dial signal from the automatic caller 2 and when the other party answers. A response signal is transferred from the automatic transmitter 2 to the terminal device 2.
In the receiving process, a plurality of dialing signal lines 6 are connected between the terminal device 7 and the automatic dialing device 2.
However, there were problems in that the circuits for the automatic calling interface section 10 and the dial control section 4 were complicated to operate and expensive.

The present invention was made in order to solve the above-mentioned problems of the conventional device.The automatic transmitter and the terminal device can be interfaced with two control lines, eliminating the need for complicated operations and eliminating the need for expensive automatic transmitters. The purpose of the present invention is to provide an automatic transmission control device which can eliminate the interface for use, simplify operation, and be highly economical.

[Means for solving problems]

The automatic call control device according to the present invention includes an automatic call interface circuit and a dial control interface circuit that interface between a control section and a dial control section, respectively, provided in a terminal device and an automatic call device, and the automatic call interface A current return circuit is constructed by connecting the circuit and the dial control interface circuit with two signal lines, and a control signal is transmitted through the current return circuit, and the level of the current flowing through the current return circuit is Based on the change, the terminal device recognizes whether or not the automatic transmission device has received a response signal.

[Effect]

The automatic call control device of the present invention enables automatic call start when the terminal device is powered on, by current circulation between the dial control interface section of the automatic call device and the automatic call interface section of the terminal device. This makes it possible to read the other party's telephone number from the other party's telephone number storage section and automatically make a call to the telephone subscriber line.

〔Example〕

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. In FIG. 1, parts having the same reference numerals as those in FIG. 3 are corresponding parts or the same parts, and a description thereof will be omitted here. 13 is a control line 1, 14 is a control line 2, 15 is a dial control interface section, 1
Reference numeral 6 is a destination telephone number storage section, in which the destination telephone number can be set in advance. 17 is a control signal;
A signal for starting or stopping transmission of a dial signal from the automatic transmission device 2; 18 is a line connection completion signal;
19 is a monitoring signal 1, and 20 is a monitoring signal 2. Figure 2 shows the automatic call interface section 1 in Figure 1.
0 is a circuit diagram showing a specific configuration of the dial control interface unit 15. FIG. In Figure 2, 2
1 is the base resistance 1, 22 is the transistor 1, 23
are the load resistor 1, 24 is the transistor 2, 25 is the load resistor 2, 26 is the diode, 27 is the load resistor 3, 28 is the photocoupler 1, 29 is the load resistor 4,
30 is a load resistor 5, 31 is a load resistor 6, 32 is a photocoupler 2, 33 is a bias voltage generating resistor, 3
4 is a base resistor 2, 35 is a load resistor 7, 36 is a transistor 3, and 37 is an inverter IC.

Next, the operation of this embodiment will be explained based on FIGS. 1 and 2.

First, when the power of the terminal device 7 is turned on, the control unit 1
1 sends a control signal 17 of "H" level (logic level), which is a dial signal sending start signal, to the automatic calling interface section 10 after a power-on reset is performed. The control signal 17 passes through the base resistors 1 and 21 and connects the transistors 1 and 22.
The collector current flows through the load resistors 1 and 23. This collector current is
The base current of transistors 2 and 24 becomes
Turn on. When the transistors 2 and 24 are turned on, a collector current flows and is sent to the control line 1 through the load resistors 2 and 25 as a dial sending start signal. The dial transmission start signal passes through the backflow prevention diode 26, the load resistors 3 and 27, the issuing diode part of the photocoupler 1 and 28, and further passes through the bias voltage generating resistor 33 and is applied to both ends of the bias voltage generating resistor. Voltage is generated. In the above process, photocouplers 2 and 28
When the switch is turned on, a collector current flows through the load resistor 429, and the monitoring signals 1 and 19 become the ground level, that is, the "L" level of the logic level, and are sent to the dial control section 4. Based on this, the dial control section 4 reads the preset destination telephone number from the destination telephone number storage section 16, controls the circuit control section 3, and makes a call to the telephone subscriber line 1 (turns it into an off-hook state). . As a result, the line control unit 3 outputs a dial tone (call ready signal) from the telephone subscriber line 1.
When the DT is received, the telephone number read by the dial control section 4 is converted into a dial signal and sent to the telephone subscriber line 1 via the line control section 3.
When the other party responds, the response signal is received by the line control section 3, and the monitoring signals 2 and 20, which are logic level "L" level signals, are sent from the dial control section 4 to the dial control interface section 15.
When the monitoring signals 2, 20 reach the logic level "L", the photo couplers 2, 32 connect to the load resistor 53.
Current flows through 0 and turns ON. Then, the voltage flows through the load resistors 6 and 31, further through the control lines 2 and 14, and into the bias voltage generating resistor 33. The ratio of the current value that flows when photo couplers 1 and 28 are turned on and the current value that flows when photo couplers 2 and 32 are turned on is determined by the load resistance 3, 27 and the load resistance 6,
31, the settings are made as follows. First, when the photocouplers 1 and 28 are turned on, the voltage generated across the bias voltage generation resistor by the current that flows is passed through the base resistors 2 and 34 so that the transistors 3 and 36 are not turned on. do. In this case, since no collector current flows through the load resistors 7 and 35, the output of the inverter IC 37, that is, the control signal 18, is at the logic "L" level, and this state indicates that the line connection is not yet completed. Next, when the photocouplers 2 and 32 turn on, the transistors 3 and 36 turn on due to the voltage generated across the bias voltage generating resistor due to the flowing current, that is, the control signal 18 becomes the logic level "H" level, and this state is indicates that it has been completed. Continuing the above explanation, photo couplers 2 and 3
2 is turned on, and the control signal 18 becomes the logic level "H" and is sent to the control section 11. The control unit 11 detects this control signal, determines that the line connection has been completed, and displays the other party's response. After responding, the other party's terminal starts transmitting the carrier, and when the modem 8 receives the carrier, it also starts transmitting the carrier. Subsequent communication will be carried out via the modem 8, and if transmission data is input from the input/output section 12, this transmission data will be sent to the modem 8 via the control section 11 and the communication interface 9.
It modulates the carrier of the modem 8, and the transmission data is sent. Received data is also transferred and received in the opposite direction to the above. It is also possible to stop the automatic call by inputting the stop key from the input/output unit 12 of the terminal device before the line connection is completed, and it is also possible to restart the automatic call by inputting the start key. .

Although the above embodiment shows a state diagram in which the automatic calling device 2 and the terminal device 7 are placed close to each other, the two devices may be provided at a long distance. Further, the input section of the input/output section 12 may be made wireless.

〔Effect of the invention〕

As described above, according to the present invention, an automatic calling interface circuit and a dial control interface circuit that interface between a control section and a dial control section are provided in a terminal device and an automatic calling device, respectively, and the automatic calling interface circuit is provided in a terminal device and an automatic calling device, respectively. A current return circuit is constructed by connecting the circuit and the dial control interface circuit with two signal lines, and a control signal is transmitted through the current return circuit, and the level of the current flowing through the current return circuit is changed. Based on the above, the terminal device is configured to recognize whether or not the automatic transmission device has received a response signal, so that the connection between the terminal device and the automatic transmission device can be made using two signal lines. It can be manufactured at low cost and has the advantage of simplifying operation.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an automatic transmission control device showing an embodiment of the present invention, FIG. 2 is a circuit diagram showing the specific configuration of the main part of FIG. 1, and FIG. FIG. 2 is a block diagram showing the configuration of a transmission control device. In the figure, 1 is a telephone subscriber line, 2 is an automatic calling device, 7 is a terminal device, 10 is an automatic calling interface section, 15 is a dial control interface section, and 16 is a destination telephone number storage section. In addition,
The same reference numerals in the drawings indicate the same or corresponding parts.

Claims (1)

[Scope of Claims] 1. A terminal device having a control unit that sends a control signal indicating the start of sending a dial signal, and a telephone number set in a destination phone number storage unit by receiving a control signal from the terminal device. A dial control unit that converts the signal into a dial signal in a line control unit and sends it to the other party's terminal, and also receives a response signal transmitted from the other party's terminal via the line control unit when the other party's terminal receives the signal. an automatic dialing control device comprising an automatic dialing device having an automatic dialing device, an automatic dialing interface circuit and a dial control interface circuit that interface between the control unit and the dial control unit to the terminal device and the automatic dialing device, respectively. A current return circuit is constructed by connecting the automatic transmission interface circuit and the dial control interface circuit with two signal lines, and transmits the control signal via the current return circuit. An automatic transmission control device characterized in that the terminal device recognizes whether or not the automatic transmission device has received a response signal based on a change in the level of the current flowing through the current circulation circuit.