JPH0591216A - Automatic notice equipment - Google Patents

Abstract

PURPOSE:To facilitate the connection work between a telephone set and the automatic notice equipment by discriminating whether or not a line is busy based on a line voltage so as to connect the telephone set and the automatic notice equipment in parallel when viewing from a station side. CONSTITUTION:A line operation detection section 9 is connected to a telephone line connection terminal 1 and a telephone set connection terminal 6 and whether or not the line is busy is detected based on a line voltage. A main control section 10 receives data from the line operation detection section 9 and a speech control section 11 is connected to the main control section 10 through a bus line.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to security information at home and an automatic notification device for automatically making a notification to a center by using a telephone line.

[0002]

2. Description of the Related Art FIG. 2 shows the configuration of a conventional automatic notification device. In FIG. 2, the connection terminal 1 is connected to the telephone line, and the emitter of the transistor 2 is the connection terminal 1
Connected to L ₁ . In the transformer 3, one winding is connected to the collector of the transistor 2 and L _{2 of the} connection terminal 1, and the other winding is connected to the ground and the communication control unit 4. The telephone 5 is connected to T ₁ and T ₂ of the connection terminal 6, the bidirectional diode of the photocoupler 7 is connected to L ₁ of the connection terminal ₁ and T _{1 of the} connection terminal 6, and the collector of the transistor is connected to the power supply. The emitter is connected to the ground via a resistor. The main control unit 8 is connected to the emitter of the transistor of the photocoupler 7 and the base of the transistor 2, and is connected to the communication control unit 4 by a bus line. The sensor connection terminal 9 is connected to a gas sensor or a fire sensor.

Next, the operation of the above conventional example will be described.
In FIG. 2, when the telephone 5 goes off-hook, the L ₁ terminal → photocoupler 7 → T ₁ terminal → telephone 5 → T ₂ terminal → L ₂
A DC loop is formed at the terminals and a local current flows. When a current flows through the diode of the photocoupler 7, the information indicating that the line is being used is transmitted from the emitter of the transistor to the main control unit 8. The main control unit 8 includes eight bus lines (address bus 4
Information is transmitted to the communication control unit 4 which is connected to the communication control unit 4 via a data bus and four data buses. The communication control unit 4 performs D / A conversion, transmits information on the line in use to the transistor 2 via the transformer 3, and the transistor 2 is in the OFF state. When the telephone 5 is on-hook, no current flows in the diode of the photocoupler 7, and the line unused information is transmitted from the emitter of the transistor to the main control unit 8. The main control unit 8 transmits the line unused information to the communication control unit 4 connected by the bus line. Communication control unit 4
Performs D / A conversion, transmits line unused information through the transformer 3, and the transistor 2 is in the ON state.

Thus, in the above-mentioned conventional automatic notification device,
When the photocoupler 7 detects whether or not a current is flowing, the automatic notification device and the telephone can be connected in series as seen from the station line.

[0005]

However, in the above-mentioned conventional automatic notification device, the use of the line cannot be detected unless a current is applied to the photocoupler 7, so that the automatic notification device and the telephone 5 are seen from the station side. Since it has to be connected in series and cannot be connected in parallel, there is a problem that it takes a lot of time and labor to connect the automatic notification device.

The present invention solves such a conventional problem, and an automatic notification device and a telephone can be connected in parallel as seen from the station side, and the connection work of the telephone automatic notification device can be easily performed. It is an object of the present invention to provide an excellent automatic notification device that can be used.

[0007]

In order to achieve the above object of the present invention, a line use detecting means is provided which is connected to a connecting terminal and determines whether or not a line is in use by a line voltage. If so, the line busy is detected.

[0008]

Therefore, according to the present invention, the line use detecting means has the effect that the telephone can be connected in parallel to the automatic notification device as seen from the station side by detecting the line use detection by the voltage.

[0009]

1 shows the structure of a first embodiment of the present invention. In FIG. 1, the telephone line connection terminal 1 is connected to the telephone line, and the emitter of the transistor 2 is
It is connected to the L ₁ terminal of the telephone line connection terminal 1. In the transformer 3, one winding is connected to the collector of the transistor 2 and the L ₂ terminal of the telephone line connection terminal 1, and the other winding is connected to the ground and the communication control unit 11. The telephone 5 is connected to the T ₁ terminal and T ₂ terminal of the telephone connection terminal 6, and the line use detection unit 10 is connected to the telephone line connection terminal 1 and the telephone connection terminal 6. The main control unit 11 is connected to the base of the transistor 2, and the line use detection unit 10,
Each of the communication control units 10 is connected by a bus line. The sensor connection terminal 13 is connected to a gas leak sensor or a fire sensor.

Next, the operation of the first embodiment will be described. In the first embodiment, when the telephone 5 goes off-hook, the value of the line voltage drops to about half the normal voltage. The line use detection unit 10 detects that the line voltage is equal to or less than half the normal voltage, and transmits information on the line use to the main control unit 11. The main control unit 11 transmits information indicating that the line is being used to the communication control unit 12, and the communication control unit 12 sends the D / D information.
The A control is performed, the information in use of the line is transmitted to the transistor 2 through the transformer 3, and the transistor 2 is turned off. Therefore, even if there is a fire and the fire sensor detects it, the main control unit 11 Do not dial the center automatically. When the telephone 5 is on-hook, the line voltage value is the normal voltage value. The line use detection unit 9 detects that the line voltage is a normal voltage and transmits the line unused information to the main control unit 10. The main control unit 10 transmits the line unused information to the communication control unit 11, the communication control unit 11 performs D / A conversion, and transmits the line unused information to the transistor 2 via the transformer 3. The main controller 11 is in the telephone mode and the transistor 2 is off. Therefore, the main control unit 10 analyzes the dial number pressed by the telephone 5 and sends the dial signal to the telephone line via the transistor 2 and the telephone line connection terminal 1. In this embodiment, when the telephone line is connected to the public exchange and the normal voltage is 48V, the normal voltage is 20V or less. If the telephone line is connected to a private branch exchange, the normal voltage is 24V,
It is 12V or less when the line is in use. The user of the automatic notification device can switch the switch (not shown) provided in the main control unit according to the exchange to which the telephone line is connected.

As described above, according to the first embodiment,
Since the line use detection unit 9 monitors the line voltage to detect whether the line is in use, the telephone 5 and the automatic notification device can be connected in parallel as seen from the station side, that is, the telephone 5 Is not necessarily connected to the telephone connection terminal 6,
Since the connection can be made from anywhere on the telephone line, the telephone 5 and the automatic notification device can be easily connected. Further, by providing the main control unit 10 with the switch, it is possible to flexibly cope with whether the telephone line is connected to the public exchange or the private branch exchange.

[0012]

As is apparent from the above embodiment, the present invention determines whether or not a line is in use by the line use detecting unit based on the line voltage, so that the telephone and the automatic notification device can be seen from the station side. Can be connected in parallel, and the connection work of the telephone and the automatic notification device can be easily performed.

[Brief description of drawings]

FIG. 1 is a schematic block diagram of an automatic notification device according to a first embodiment of the present invention.

FIG. 2 is a schematic block diagram of a conventional automatic notification device.

[Explanation of symbols]

 1 Telephone line connection terminal 6 Telephone connection terminal 9 Line use detection unit 10 Main control unit 11 Communication control unit

Claims (1)

[Claims] 1. A line use detecting means connected to a connection terminal for determining whether or not the line is in use by a line voltage, a main control section for inputting data from the line use detecting means, and this main control section. And an automatic notification device including a communication control unit connected by a bus line.