JPH0318382B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic dialing device that uses telephone line voltage as a power source for a device equipped with a microcomputer.

Conventionally, automatic dialing devices had a separate power supply independent from the telephone line, and the power supply was turned on and off from this separate power supply.
A power switch is provided, and the power switch must be turned off each time the machine is used.
It was turned on and off.

The present invention makes it possible to turn the power on and off when the telephone is off-hook and on-hook by connecting the telephone in series to a telephone line and using the telephone line voltage as a power source.
Furthermore, by providing a bypass circuit for the bell signal, an automatic dialing device is provided which can prevent malfunctions caused by the arrival of the bell signal sent to the telephone.

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a wiring diagram of the main parts of an automatic dialing device according to an embodiment of the present invention.

In the figure, 1 is an automatic dialing device 1 having a microcomputer to be described later, 2 is a known telephone, and 3 is a telephone line.

Hereinafter, the above-mentioned blocks will be explained in more detail. In the automatic dialing device 1, 4 is a control circuit consisting of a microcomputer and an input/output circuit. 5 is a modular plug that connects the telephone line 3 and the automatic dialing device 1, and 6 is a modular jack that connects the telephone 2 and the automatic dialing device 1. 7 is a diode rectifier, and 8 is a dial switching circuit, which performs a switching operation in response to a dial signal sent from a terminal 4a of a control circuit 4 having a microcomputer.
Reference numeral 9 denotes a constant voltage power supply circuit that supplies power from the telephone line 3 to the control circuit 4. Numeral 10 is a luminescent memory for storing dial numbers, and the dial number data is written and read from a terminal 4b of a control circuit 4 having a microcomputer. 1
Reference numeral 1 denotes a backup battery for the luminescent memory 10. Reference numeral 12 denotes a reset circuit for the microcomputer in the control circuit 4, which detects the rise of the constant voltage power supply circuit 9 and sends a reset signal to the terminal 4c of the control circuit 4 including the microcomputer. 13 is a relay that short-circuits between the tip and ring of telephone 2 only during dialing, 14 is a contact of the relay, and 15 is a capacitor that bypasses the bell signal sent to telephone 2. 17 is phone 2
The switch 18 inside is a bell circuit.

The operation of the apparatus configured as described above will be described below with reference to the drawings.

First, telephone 2 connected to modular jack 6.
Since the diode rectifier 7, dial switching circuit 8, constant voltage power supply circuit 9, and modular plug 5 are connected in series to the telephone line 3, when the telephone 2 is off-hook, the telephone line voltage is Constant voltage power supply circuit 9 via rectifier 7
The voltage generated in the constant voltage power supply circuit 9 is applied to the control circuit 4 having a microcomputer and the reset circuit 12. Now, since the reset circuit 12 is a reset circuit with a voltage comparator with a built-in reference voltage, when the voltage generated in the constant voltage power supply circuit 9 rises above a certain reference voltage, the reset circuit 12 resets the control circuit 4 having a microcomputer. When the voltage drops below the reference voltage, an operation stop signal is generated. Note that this reference voltage is set to a stable operating voltage of the microcomputer of the control circuit 4. This makes it possible to prevent the microcomputer in the control circuit 4 from malfunctioning, runaway, or other abnormal operations in an unstable state when the power supply circuit starts up or falls down.

Therefore, when the telephone 2 is turned off, the microcomputer in the control circuit 4 starts operating as if the power switch was turned on, and when the telephone 2 is turned on, the power switch is turned on.
It stops working as if it were turned off.

Furthermore, when a bell signal sent to the telephone set 2 arrives, the bell signal input from the telephone line 3 is sent to the bell circuit 18 of the telephone set 2 via the modular plug 5, bypass capacitor 15, relay contact 14, and modular jack 6. applied. Therefore, no voltage is generated in the constant voltage power supply circuit 9, the microcomputer in the control circuit 4 does not operate, and is not affected by the bell signal at all.

Furthermore, while the dial pulse signal is being sent, the terminal 4d of the control circuit 4 having a microcomputer is
By driving the muting relay 13 and turning the relay contact 14 from the B side to the A side, a short circuit is created between the tip and the ring of the telephone 2, and the surge voltage caused by the dial pulse is applied to the telephone 2. prevent it from entering. At the same time, the bell signal bypass capacitor 15 is disconnected from the telephone line 3, thereby preventing dial pulse distortion.

Hereinafter, the wiring of the constant voltage power supply circuit 9 and reset circuit 12 shown in FIG. 1 will be explained using FIG. 2. In FIG. 2, 21 is a constant voltage diode, 22 is a smoothing capacitor, 23 is a constant voltage diode for reference voltage, 24 is a bias resistor of the constant voltage diode 23, 25 is a base resistance of a switching transistor 26, and 27 is a waveform. This is the bias resistance of the operational amplifier for shaping. Note that the switching transistor 26 is a constant voltage diode 2.
When the voltage generated across the terminal 3 becomes equal to or higher than the reference voltage, it becomes conductive, and when it becomes equal to or less than the reference voltage, it becomes non-conductive.

As described above, the present invention provides a terminal in a telephone line so as to be connected in series with a telephone, and controls the voltage between the terminal connected to one line of the line and the terminal connected to one terminal of the telephone. Since the operating/non-operating state of the control means of the dialing device is switched by comparing with the reference voltage, the automatic dialing device can be deactivated by off-hook and on-hook of the telephone connected to the automatic dialing device. can be switched from one state to another.

In addition, if a circuit in which a capacitor and a relay contact are connected in series is connected in parallel to the device, and the relay is operated only during dying to disconnect the capacitor from the telephone line, when the bell signal sent to the telephone arrives, the device It is possible to eliminate the influence on the dial pulse and prevent dial pulse distortion.

[Brief explanation of drawings]

FIG. 1 is a wiring diagram of essential parts of an automatic dialing device according to an embodiment of the present invention, and FIG. 2 is a wiring diagram of an identification voltage power supply circuit and a reset circuit. DESCRIPTION OF SYMBOLS 1...Automatic dialing device, 2...Telephone, 3...Telephone line, 4...Control circuit, 5...Modular plug, 6
...Modular jack, 7...Diode rectifier,
8... Dial switching circuit, 9... Constant voltage power supply circuit, 10... Luminescent memory, 11... Backup battery, 12... Reset circuit, 13... Relay,
15, 22... Capacitor, 21, 23... Constant voltage diode, 26... Transistor, 28... Operational amplifier.

Claims (1)

[Claims] 1. A first terminal connected to one line of a telephone line, a second terminal connected to the other line of the telephone line, and a first terminal connected to the second terminal and connected to the other line of the telephone line. a third terminal connected to one of the wires; a fourth terminal connected to the other terminal of the telephone; and a third terminal connected to the first terminal and the fourth terminal and applied between the two terminals. a constant voltage generating means that outputs a constant voltage based on a voltage; a memory means that stores a dialed number of the other party; and a memory means that operates using the voltage from the constant voltage generating means as a power source, and writes and reads the dialed number to and from the memory means. a control means for comparing the voltage between the first terminal and the fourth terminal with a reference voltage, and determining whether the voltage between the first terminal and the fourth terminal is higher than the voltage between the first terminal and the fourth terminal; An automatic dialing device comprising: means for switching the control means from a non-operating state to an operating state when the value increases. 2. A first terminal connected to one line of the telephone line, a second terminal connected to the other line of the telephone line, and a second terminal connected to the second terminal and connected to one line of the telephone set. a third terminal connected to the other terminal of the telephone; a fourth terminal connected to the first terminal and the fourth terminal and determined by a voltage applied between the two terminals; a constant voltage generating means for outputting a voltage; a memory means for storing the dialed number of the other party; a control means that operates using the voltage from the constant voltage generating means as a power source and writes and reads the dialed number in the storing means; The control means compares the voltage between the first terminal and the fourth terminal with a reference voltage, and if the voltage between the first terminal and the fourth terminal is higher, the control means 1. An automatic dialing device comprising: means for switching a telephone from an inactive state to an active state; and a bypass circuit for a ring signal sent to a continued telephone.