JPH0897928A - Automatic reporting system - Google Patents

Abstract

PURPOSE: To allow the automatic reporting equipment to attain the communication with high reliability even when an automatic answering telephone set makes an automatic reply in the case of data communication in which the arrival of a call (adopting a system that a bell rings by a general dial signal from a center) starts the automatic reporting equipment. CONSTITUTION: The system is provided with a bell detection circuit 11 detecting a bell call signal to call an automatic reporting equipment 1 from a central monitor center 2 via a telephone line network 3, a line current detection circuit 13 detecting a hooked-off telephone set 7, a relay switch 24 disconnecting the telephone set 7 from the subscriber telephone line 10, and a PB signal detection circuit 16 detecting an identification signal used to start communication with a terminal equipment. After the bell call signal is detected, the mode is set to the operation mode, and when a hook-off signal of the telephone set 7 is detected, the telephone set 7 is disconnected from the subscriber telephone line 10, and after a 1st identification signal in the identification signal is received, when a 2nd identification signal is received, the telephone set 7 is connected to the subscriber telephone line 10. Then the communication operation is transited by a communication start control signal of the identification signal sent thereafer and when the 1st identification signal cannot received, the telephone set 7 is connected to the subscriber telephone line 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention automatically transmits information signals such as meter values and sensor information on the side of an automatic reporting device to a centralized monitoring center side via a telephone line network, and automatically transmits them from the centralized monitoring center side. The present invention relates to an automatic notification system having a mutual activation type automatic notification device capable of calling a notification device to perform data loading and the like.

[0002]

2. Description of the Related Art Conventionally, in an automatic notification system having an automatic notification device using a general subscriber telephone line, when calling the automatic notification device from a centralized monitoring center, a no ringing trunk is used to connect the telephones in the home. A method for calling the target automatic notification device without ringing the bell to perform data communication, and a method for calling the automatic notification device by ringing the bell of the phone by dialing normally without using the no ringing trunk (hereinafter ringing There is a method).

The no-ringing system is a special service realized by adding a no-ringing trunk (hereinafter referred to as NRT) having a special function to a telephone exchange, which is 16 Hz.
Without using the bell signal, the data is transmitted by specifying the target automatic alerting device by the no-ringing call signal (1 digit PB signal) in the half-loop state with gentle polarity inversion. As a known example, JP-A-2-70
There is a Japanese Patent No. 165 (terminal device of network control device).

In addition, as an example of a ringing method for calling a target automatic notification device without using NRT, an identification signal indicating that data communication is performed within a fixed time after automatically responding to a 16 Hz bell signal, , There is one that connects the data communication terminal to the line that received the call when the carrier signal is detected.
If there is a gazette (communication system on the telephone line) and the target signal cannot be detected, the 16Hz bell signal is sent to the voice communication terminal (telephone) and at the same time the calling side is sent. On the other hand, there is a method in which a ringback tone and a message indicating that the telephone is being called are sent to select a home telephone and a data communication terminal. There is Japanese Patent Laid-Open No. 2-7763 (image communication device).

[0005]

The no-ringing method is not always applicable to all telephone lines, and the NRT is not available.
If the automatic notification device is installed on the line where the line is not installed or on the extension side of the PBX, the automatic notification device cannot be called, and the installation and operation of the automatic notification device is restricted. In addition, N that accommodates the target automatic notification device
The automatic notification device cannot be called even when the RT is busy by being used for other communication due to continuous meter reading.

This busy state is inconvenient especially when an emergency operation is desired from the center to the automatic notification device.

Then, after the user answers by ringing the bell of the telephone by the usual dialing method,
After explaining from the center that data communication will be performed between the automatic notification device and the center to the user, after obtaining consent,
In the method that sends an identification signal and connects the line to the automatic notification device, if the user has installed an answering machine, when the answering machine answers the call from the center, the caller will automatically receive a guidance voice for answering. If the automatic notification device receives the call identification signal from the center at this time, the identification signal sent from the center and the voice guidance sent from the answering machine will be received at the same time, and the automatic notification device will identify. In some cases, the signal could not be received.

[0008]

In order to solve the above-mentioned problems, the present invention automatically transmits data of a meter and a sensor to a centralized monitoring center via a telephone line network, and the centralized monitoring center described above In an automatic notification system having a mutual activation type automatic notification device capable of transmitting data via a telephone network, a bell detection circuit for detecting a bell ringing signal for calling the automatic notification device from the centralized monitoring center via the telephone network. A line current detection circuit for detecting off-hook of the telephone, a relay switch for disconnecting the telephone from the subscriber telephone line, and a PB signal detection circuit for detecting an identification signal for starting communication with the terminal device, When the ringing signal is detected, the operation mode is entered, and when the off-hook signal of the telephone is detected, the telephone is disconnected from the subscriber telephone line and the front After receiving the first identification signal of the identification signal, when the second identification signal is received, the telephone is connected to the subscriber's telephone line, and the communication operation is shifted by the communication start control signal of the identification signal transmitted thereafter, When the first identification signal cannot be received, the telephone is controlled to connect to the subscriber telephone line.

[0009]

According to the present invention, when the automatic notification device detects the off-hook of the telephone due to the call signal, the telephone is disconnected from the telephone line and the automatic notification device is the first from the center.
To wait for the identification signal of.

If the telephone cannot be received within a certain period of time, the telephone is immediately connected to the telephone line and the automatic notification device goes into a standby state. If the second identification signal is received after receiving the first identification signal, connect the telephone to the telephone line and continue to the second identification signal.
After waiting for reception of the identification signal of, the center communicates with the user by conversation, and then receives the communication start control signal so that the telephone is not disconnected from the telephone line so as not to interfere with communication, Communication is set.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a system diagram showing an embodiment of the automatic notification system of the present invention, FIG. 2 is a block diagram showing the configuration of the automatic notification system, and FIG. 3 is a flowchart showing the same.

In FIG. 1, 1 is an automatic notification device,
Centralized monitoring center 2 that manages various information signals on the terminal side is connected via telephone line network 3 and subscriber telephone line 10.

The center side exchange 4 accommodates the centralized monitoring center 2. The automatic notification device side switch 5 is the automatic notification device 1
Housing a No Ringing Trunk (NRT) 6
Is added, and the central monitoring center 2 dials the NRT 6 to call the automatic notification device 1 in a procedure according to the no ringing method.

A telephone 7 is connected to the subscriber telephone line 10 via the automatic notification device 1.

Reference numeral 8 is a meter for measuring the usage of water, electric power, etc., which is connected to the above-mentioned automatic notification device 1 and outputs a pulse signal corresponding to the respective usage, or the above-mentioned automatic notification device. 1 has a function of performing data communication with

Reference numeral 9 denotes a sensor, which detects a change in state of a certain event such as gas, liquid level, push button, etc., and is connected to the automatic notification device 1 to output a signal corresponding to each state change. It has a function to output.

In FIG. 2, reference numeral 27 denotes a storage operation device, which controls the operation of the automatic notification device 1 in accordance with a preset and stored procedure.

Reference numeral 11 is a circuit for detecting a 16 Hz bell signal, which is connected between the subscriber's telephone line 10 and the storage arithmetic unit 27, and is 16 Hz transmitted from the telephone line network 3 when there is an incoming call. It has a function of detecting the bell signal of and transmitting it to the storage arithmetic unit 27.

Reference numeral 12 denotes a slow polarity reversal detection circuit which is inserted into the subscriber telephone line 10 and is connected to the storage arithmetic unit 27 so that the NRT 6 operates to cause the subscriber telephone line 10 to have a slow polarity. It has a function of detecting the occurrence of inversion and transmitting it to the storage operation device 27.

Reference numeral 13 is a line current detection circuit which is inserted into the subscriber's telephone line 10 and is also connected to the storage arithmetic unit 2
7 and the telephone 7 is connected to the telephone network 3
It has a function of detecting the line current flowing through the subscriber telephone line 10 and transmitting it to the storage arithmetic unit 27 when the line is closed in response to the 16 Hz bell signal sent from the subscriber.

Reference numerals 14 and 15 respectively denote a capacitor and a transformer. The primary winding of the transformer 15 is connected between the subscriber telephone lines 10 and the capacitor 14 is connected to one of the primary windings. .

The capacitor 14 insulates DC and the transformer 15 has a high AC impedance, so that a signal is sent to the PB signal detection circuit 16 described later without affecting the communication state of the subscriber telephone line 10. It is an interface circuit that transmits.

Reference numeral 16 is a PB signal detection circuit, one end of which is connected to the secondary winding of the transformer 15 and the other end of which is connected to the storage arithmetic unit 27, and which is connected to the subscriber telephone line 10. It is a circuit for detecting and discriminating the transmitted PB signal and transmitting it to the above-mentioned storage arithmetic unit 27. For example, a circuit using a PB signal receiver LSI is used.

Reference numeral 17 denotes a rectifier circuit, which is a half-loop circuit 18 to be described later even if the polarity of the subscriber telephone line 10 is reversed,
It has a function of supplying a constant polarity to the DC closing circuit 19.

Reference numeral 18 denotes a half loop circuit, which is the rectifying circuit 17 described above.
While being connected to the subscriber's telephone line 10 through the above, the storage arithmetic unit 27 and the AC 600Ω switch 19 described later are also connected.

The half-loop circuit 18 is a circuit for responding in a procedure conforming to the no-ringing system, and a DC resistance value of 4 KΩ or more when a line current of 5 mA or more and 20 mA or less is flowed under the control of the storage arithmetic unit 27. And has a function of making the subscriber telephone line 10 semi-closed.

Reference numeral 21 denotes a 600Ω transformer, one end of the primary winding of which is connected to an AC 600Ω switch 19 and a DC closing circuit 20 which will be described later, and the other end of which is connected to the subscriber telephone line via the rectifying circuit 17. Connected to 10. The secondary winding is connected to a PB signal transmission circuit 22 and a signal modulation / demodulation circuit 23, which will be described later.

The primary winding of the 600Ω transformer 21 is 50Ω
~ 100Ω DC resistance and AC impedance 600Ω in the frequency band of 300Hz ~ 4KHz, primary: 2
The transformer with the next turns ratio is 1: 1 and the PB signal transmission circuit 2 which will be described later in a 600Ω balanced state with the subscriber telephone line 10 described above.
2 and the signal of the signal modulation / demodulation circuit 23, and has a function of galvanically isolating the subscriber telephone line 10 and a circuit connected to the secondary side of the transformer.

Reference numeral 19 denotes an AC 600Ω switch, which is connected to the half loop circuit 18 and one end of the primary winding of the 600Ω transformer described above, and is further connected to the storage arithmetic unit 27.

The AC 600Ω switch 19 is a switch for connecting the above-mentioned 600Ω transformer 21 in an AC manner when the half-loop circuit 18 is in a DC half-closed state of the line, and is controlled by the memory operation unit 27.

Reference numeral 20 denotes a DC closed circuit, one end of which is connected to the subscriber telephone line 10 through the rectifying circuit 17 and the other end of which is connected to one end of the primary winding of the 600Ω transformer 21. At the same time, it is also connected to the above-mentioned storage operation device 27.

The DC closing circuit 20 is the storage arithmetic unit 27 described above.
When turned on, the subscriber telephone line 10 is closed by the DC resistance 50Ω to 100Ω of the 600Ω transformer 21 via the rectifier circuit 17, and the AC impedance 600Ω is balanced. It is possible to put the subscriber telephone line 10 into a call state,
If it is turned off, the line can be opened.

Further, it also has a function of sending a dial pulse signal by turning on / off at an appropriate timing under the control of the storage arithmetic unit 27.

Reference numeral 22 denotes a PB sending circuit, which is connected between the secondary winding of the 600Ω transformer 21 and the storage arithmetic unit 27, and is controlled by the storage arithmetic unit 27 to control the above 6
A circuit that outputs a PB signal via the 00Ω transformer 21. In addition to transmitting a PB dial signal and a PB signal of the ANS signal “#” according to an incoming procedure conforming to the no ringing method, it also transmits data using the PB signal. It has a function to do.

A signal modulation / demodulation circuit 23 is connected between the secondary winding of the 600Ω transformer 21 and the storage operation device 27.

A signal modulation / demodulation circuit 23 performs data communication with the centralized monitoring center 2 through the 600Ω transformer 21, the rectifier circuit 17, the subscriber telephone line 10, and the telephone line network 3 under the control of the storage arithmetic unit 27. A circuit, for example, a circuit using a full-duplex modem LSI of the FSK signal system or the like is used.

Reference numeral 24 is a relay switch, which is an automatic notification device 1.
Is communicating with the telephone 7 and the subscriber telephone line 10
The side is switched to the side of the off-hook detection circuit 26, which will be described later, on the side of the automatic notification device 1.

Reference numeral 25 denotes a relay drive circuit, the output side of which is connected to the relay switch 24 and the input side of which is connected to the storage arithmetic unit 27. The storage arithmetic unit 27 controls the relay switch 24 to switch the switches. Is a circuit that performs.

Reference numeral 26 is an off-hook detection circuit, the input side of which is connected to a relay contact 26 described later and the output side of which is connected to the storage arithmetic unit 27. This is a circuit for detecting the off-hook of the telephone 7 when the switch 7 is switched to the off-hook detection circuit 26 side.

Reference numeral 28 denotes a meter interface circuit, which is connected between the meter 8 and the storage / calculation device 27, receives a pulse signal from the meter 8 or communicates with the meter 8. It has a function of transmitting it to the storage operation device 27.

Reference numeral 29 denotes a sensor interface circuit, which is connected between the sensor 9 and the memory processing unit 27 and has a function of receiving a signal from the sensor 9 and transmitting this signal to the memory processing unit 27. Is a circuit having.

A data registration interface circuit 30 is connected between a data registration device 32, which will be described later, and the storage / calculation device 27, takes in data from the data registration device 32, and stores this data in the storage / calculation device 27.
Is a circuit having a function of transmitting to.

Reference numeral 31 denotes a connector, which is a data registration device 3 described later.
2 and the data registration interface circuit 30 described above.
2 has the function of freely attaching and detaching the automatic notification device 1 and the automatic notification device 1.

A data registration device 32 is connected to the automatic notification device 1 for registering, storing and changing data for performing its operation.

For example, in addition to the telephone number of the centralized monitoring center 2 and the user code of the automatic notification device 1 described above, an NRS signal ("0-9" for selecting the automatic notification device 1 when an incoming call is received by the no ringing method. 1 digit number in ") and a first identification signal (PB signal of 1 digit number) sent to select the automatic notification device 1 from the centralized monitoring center 2 when an incoming call is received by the ringing method, and A device for registering, storing and changing the second identification signal (4-digit PB signal) and communication start control signal (4-digit PB signal), which is detachably attached to the automatic notification device 1 by the connector 31. I can do things.

Next, the operation when there is an incoming call to the subscriber telephone line 10 to which the automatic notification device 1 is connected will be described with reference to FIGS. 2 and 3 of this embodiment.

First, at A1, an incoming call is detected by monitoring the occurrence of polarity reversal in the subscriber telephone line 10.

Here, the polarity inversion is gentle polarity inversion detection circuit 1
When it is detected by 2, the timer of 350 mS is started at A2 and A3, and the half loop circuit 18 is closed to respond to the polarity inversion detection.

Then, in the flow of A4-A5-A4, 350
Within mS, the NRT 6 shown in FIG. 1 transmits an NRS signal, which is a one-digit PB signal of “0 to 9”, to the subscriber telephone line 10 or P via the capacitor 14 and the transformer 15.
The B signal detection circuit 16 monitors.

At this time, if the NRS signal can be detected within 350 mS, it is determined that the incoming call is based on the no-ringing method, and the processing after A6, which is a response procedure based on the no-ringing method, is executed.

On the contrary, when the NRS signal cannot be detected within 350 mS, it is judged that the incoming call is based on the ringing method, and the processing after B1 which is a response procedure based on the ringing method is executed.

If it is assumed that the NRS signal can be detected within 350 mS, it is determined whether the NRS signal detected at A6 matches the NRS signal stored and registered in the storage operation device 27 by the data registration device 32 in advance. I do.

If the NRS signals do not match, it is judged that the automatic notification device 1 has not been selected, and the process jumps to A12 to open the half closed state of the half loop circuit 18 and end the series of operations. .

When the NRS signals match, the AC 600Ω switch 19 is turned on at A7 to turn on the subscriber telephone line 1.
The AC impedance of 0 is balanced at 600Ω, and the ANS signal (PB signal “#”) of the response signal, which is the response procedure according to the no ringing method from the PB signal transmission circuit 22 at A8.
1 digit) is sent to the NRT 6 of FIG. 1 via the 600Ω transformer 21, the AC 600Ω switch 19, the half loop circuit 18, the rectifying circuit 17, and the subscriber telephone line 10 described above.

Next, in the flow of A9-A10-A9, the signal modulation / demodulation circuit 23 causes the above 600Ω transformer 21, A
Communication is performed with the centralized monitoring center 2 via the C600Ω switch 19, the half-loop circuit 18, the rectifying circuit 17, the subscriber telephone line 10, and the telephone line network 3.

When the communication is completed, the AC 600Ω switch 19 and the half loop circuit 18 are opened to complete a series of operations. It becomes A11-A12-END.

The processing when the call arrives by the no ringing method has been described above.

Next, description will be made regarding the case where an incoming call is received by the ringing method.

When an incoming call is received by the ringing method, A4-A
Since the NRS signal cannot be detected within 350 mS at 5-A4, the processes from B1 to B20 are performed thereafter.

At B1, the half-loop circuit 18 is opened, and the incoming procedure by the no ringing method is completed.

At B2, the bell timer is started. The bell timer is a limit timer for terminating the incoming call procedure by the ringing method when the bell does not ring for a set time or longer.

Next, B3-B4-B6-B3 or B3
-While the bell is ringing intermittently by the flow of B5-B6-B3 is monitored by the bell detection circuit 11, and whether the telephone 7 is off-hook and a line current flows through the subscriber telephone line 10. The line current detection circuit 13 is monitoring.

If the bell stops before the telephone 7 responds, the bell timer is timed up in the processing of B3-B5-B6-B3, and the response procedure ends with B5-END.

Next, when the telephone 7 responds to the bell and a line current flows, B7-B8-B9-B10-B11.
The relay drive circuit 25 is operated so as to disconnect the telephone 7 from the telephone line 10 in accordance with the above flow, the DC closing circuit 20 is turned on, and the first identification signal from the centralized monitoring center 2 is transmitted via the capacitor 14 to the transformer 15 , PB signal detection circuit 16 for monitoring.

The first identification signal is a continuous signal of one digit of the PB signal number, and when detected, B12-B13-B14.
Then, the second identification signal is monitored in the flow of. The second identification signal is a 4-digit PB signal for identifying the terminal device, and when it is detected, it is B15-B16-B17.
The relay drive circuit 25 is operated so that the telephone 7 is connected to the telephone line 10 in accordance with the above flow, the DC closing circuit 20 is turned off, and the communication start control signal is monitored by the capacitor 14, the transformer 15, and the PB signal detection circuit 16. , Monitoring with a high impedance that does not affect the subscriber telephone line 10 described above.
Subsequently, in B18-B19, the data registration device 32 compares the communication start control signal previously registered and stored in the storage operation device 27.

If the first identification signal is not detected,
Alternatively, if the timer A times out while the first identification signal does not match, the relay drive circuit 25 is operated to connect the telephone 7 to the telephone line 3, and the incoming procedure by the ringing method is completed. However, the timer A is started when the line current is detected.

If the second identification signal is not detected,
Alternatively, if the timer B times out while the second identification signal does not match, the relay drive circuit 25 is operated to connect the telephone 7 to the telephone line 3, and the incoming procedure by the ringing method is completed. However, the timer B is started when the line current is detected.

On the other hand, at B18, if the 4-digit PB signal of the communication start control signal is compared with the communication start control signal previously registered and stored in the storage arithmetic unit 27 by the data registration device 32, and if they match, It is judged that the incoming call is from the centralized monitoring center 2 by the ringing method, and the following B2
Processes 0 to B25-END are performed. However, the timer C is started when the second identification signal is detected.

At B24, the relay drive circuit 25 is operated to connect the telephone 7 to the telephone line 3.

Subsequently, in B21, the relay drive circuit 2 described above is used.
5 is operated to switch the relay switch 24 to disconnect the telephone 7 from the subscriber telephone line 10 and switch to the off-hook detection circuit 26.

Subsequently, in the flow of B22-B23-B22, the signal modulation / demodulation circuit 23 concentrates via the 600Ω transformer 21, the DC closing circuit 20, the rectifying circuit 17, the subscriber telephone line 10 and the telephone line network 3. Monitoring center 2
Communicate with.

When the communication is completed, the relay switch 2 mentioned above
4 to switch the telephone 7 to the subscriber telephone line 10
, The DC closed circuit 20 is turned off, the subscriber telephone line 10 is opened, the flow of B24-B25-END is executed, and a series of operations is ended.

Therefore, when the calling signal of the telephone 7 is detected, the storage / calculation device 27 is changed from the standby state to the operating state.
The telephone 7 waits for off-hook detection, and immediately after the off-hook is detected, the telephone 7 is disconnected from the telephone line network 3,
The first automatic notification device 1 is sent from the centralized monitoring center 2.
Waiting to receive the identification signal of the 1-digit PB signal, and if no detection is made within a certain period of time, the telephone 7 is immediately connected to the telephone network 3.

Therefore, when the call is not made from the centralized monitoring center 2, the time when the telephone 7 is cut off from the telephone line network 3 can be made very short.

When detected, the second identification signal monitoring continues, and when the 4-digit identification signal is received, the telephone 7 is connected to the telephone line network 3 to receive the communication start control signal from the centralized monitoring center 2. After waiting, and contacting the centralized monitoring center 2 with the user through conversation, the communication operation can be started when the communication start control signal is received.

Therefore, when a telephone call is made from other than the centralized monitoring center 2, the telephone 7 cannot be used for only a very short time during the first off-hook.

[0078]

As described above, according to the present invention, the telephone can be disconnected from the telephone network when receiving the first identification signal and the second identification signal from the centralized monitoring center. Noise from the telephone side does not enter and the identification signal is not erroneously detected, and the reliability of communication can be improved.

Further, it is also effective in reducing the cost of the product.

[Brief description of drawings]

FIG. 1 is a system configuration diagram in an automatic notification system showing an embodiment of the present invention.

FIG. 2 is a block diagram of an automatic notification system showing an embodiment of the present invention.

FIG. 3 is an operation flowchart in the automatic notification system showing the embodiment of the present invention.

FIG. 4 is an operation flowchart in the automatic notification system showing the embodiment of the present invention.

[Explanation of symbols]

 1 Automatic Notification Device 2 Central Monitoring Center 3 Telephone Line Network 7 Telephone 8 Meter 9 Sensor 10 Subscriber Telephone Line 11 Bell Detection Circuit 13 Line Current Detection Circuit 16 PB Signal Detection Circuit 24 Relay Switch

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Junichi Shimizu 1 3-3 Shinjuyo, Kashiwa City, Chiba Prefecture

Claims (1)

[Claims] 1. Data of a meter (8) and a sensor (9) is automatically transmitted to a centralized monitoring center (2) through a telephone line network (3), and the telephone is sent from the centralized monitoring center (2). In an automatic notification system having a mutual activation type automatic notification device (1) capable of transmitting data via a line network (3), an automatic notification device (from the centralized monitoring center (2) via the telephone line network (3) ( Bell detection circuit (11) for detecting a bell ringing signal for calling 1) and a telephone (7)
A line current detection circuit (13) for detecting off-hook of
A relay switch (24) for disconnecting the telephone (7) from the subscriber telephone line (10) and a PB signal detection circuit (16) for detecting an identification signal for starting communication with the terminal device.
And when the bell ringing signal is detected, the operation mode is entered, when the off-hook signal of the telephone (7) is detected, the telephone (7) is disconnected from the subscriber telephone line (10), and the first identification signal of the identification signal is provided. After receiving the second identification signal, the telephone (7) is turned on to the subscriber telephone line (10).
To the communication line by the communication start control signal of the identification signal transmitted thereafter, and when the first identification signal cannot be received, the telephone set (7) is set to the subscriber telephone line (1).
0) An automatic notification system characterized by controlling to connect to 0).