JP3548261B2 - Automatic notification system - Google Patents

Description

[0001]
[Industrial applications]
The present invention automatically transmits information signals from the automatic reporting device, such as meter values and sensor information, to the central monitoring center via the telephone network, and calls the automatic reporting device from the central monitoring center to perform data loading. The present invention relates to an automatic notification system having a mutual activation type automatic notification device capable of performing such operations.
[0002]
[Prior art]
Conventionally, in an automatic notification system having an automatic notification device using a general subscriber's telephone line, when the automatic notification device is called from a centralized monitoring center, the bell of the telephone at home is not ringed using a no-ringing trunk. A method of calling a desired automatic reporting device to perform data communication, and a method of calling an automatic reporting device by ringing a bell of a telephone by using a normal dial without using a no ringing trunk (hereinafter referred to as a ringing method). there were.
[0003]
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 central office exchange, and does not use a 16 Hz bell signal, has a gentle polarity reversal, and has a half-loop state. A data communication is performed by designating a target automatic notification device by a no ringing call signal (one digit of a PB signal). A known example of the automatic notification device using this is Japanese Patent Laid-Open Publication No. Terminal device).
[0004]
In addition, examples of the ringing method for calling a target automatic notification device without using the NRT include an identification signal indicating that data communication is performed within a predetermined time after automatically responding to a 16 Hz bell signal, and a carrier signal. Is detected, a data communication terminal is connected to the line on which the call was received. A known example of such a device is Japanese Patent Publication No. 53-2282 (communication system for telephone lines). On the other hand, if the target signal cannot be detected, a 16-Hz bell signal is transmitted to the voice communication terminal (telephone), and at the same time, it indicates to the calling side that a ringback tone or a telephone is being called. A method of selecting a home telephone and a data communication terminal by transmitting a message to the effect of this is implemented. 63 No. (image communication apparatus) and the like.
[0005]
[Problems to be solved by the invention]
The no-ringing method is not always available for all telephone lines. If the line does not have an NRT, or if an automatic reporting device is installed on the PBX extension line, it is possible to call this automatic reporting device. It is not possible, and there is a limit on the installation and operation of the automatic notification device. In addition, the NRT accommodating the target automatic notification device is used for other communication by continuous meter reading or the like, and the automatic notification device cannot be called even in the busy state.
[0006]
This busy state is particularly inconvenient when the center wants to perform an emergency operation on the automatic notification device.
[0007]
Then, after the user responds by ringing the bell of the telephone using the normal dialing method, the center explains to the user that data communication will now be performed between the automatic reporting device and the center, and after obtaining consent, In the system that sends an identification signal and connects the line to the automatic notification device, if the user has a voice mail device installed, when the voice mail device answers the call from the center, a guidance voice for answering is automatically sent. If the automatic notification device receives the call identification signal from the center at this time, the identification signal transmitted from the center and the guidance voice transmitted by the answering machine are simultaneously received, so that the automatic notification device There were cases where the identification signal could not be received.
[0008]
[Means for Solving the Problems]
The present invention, in order to solve the above problems, through and conveyed automatically through the subscriber telephone line data of the meter and the sensors to a central monitoring center, the subscriber telephone line from the central monitoring center data can be transmitted, in an automatic notification system having a cross-triggered automatic notification apparatus connected to the user's phone, the automatic reporting device detects a bell signal to invoke the automatic call device via the subscriber telephone line from the central monitoring center A bell detection circuit, 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 for detecting an identification signal and a communication start signal transmitted from the centralized monitoring center. a detection circuit, a DC閉結circuit閉結in DC resistance of the subscriber telephone line, a signal demodulation circuit for performing data transmission, each time And a storage operation unit for controlling the upon detection of the bell signal storage operation unit starts counting the detection number of the ringing signal, et detecting the off-hook signal of the telephone by the line current detection circuit, the ringing signal It is determined whether or not the number of detections matches a preset value. If the numbers match, the DC closing circuit is turned on, and at the same time, the telephone is disconnected from the subscriber's telephone line by the relay switch , and then the identification signal is detected by the PB signal detection circuit. After the reception, when the communication start signal is received, data transmission is performed by the signal modulation / demodulation circuit, and when the number of times of detection of the bell signal does not match the set value, the identification signal is thereafter received by the PB signal detection circuit. Later, when a communication start signal is received, the signal modulation / demodulation circuit is controlled to perform data transmission.
[0009]
[Action]
The present invention is the arrangement, if the automatic reporting device detects an off-hook of the telephone there is a bell signal, the subscriber telephone line telephone After match by determining whether the detected number of the ringing signal matches the set value From the centralized monitoring center and waits for reception of the identification signal from the centralized monitoring center.
[0010]
If the identification signal cannot be received within a certain period of time, the telephone is immediately connected to the subscriber's telephone line, and the automatic reporting device enters a standby state. Upon receipt of the identification signal, after the contact by phone conversation with the centralized monitoring center and the user, upon receiving the communication start signal, from the manner it does not interfere with data communication disassociate from the subscriber's telephone line phones, centralized Performs data communication with the monitoring center.
[0011]
【Example】
Hereinafter, description will be made with reference to the drawings showing one embodiment of the present invention.
[0012]
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 FIGS. 3 and 4 are flowcharts showing the same.
[0013]
In FIG. 1, reference numeral 1 denotes an automatic notification device, which is connected to a centralized monitoring center 2 for managing various information signals on the terminal side via a telephone line network 3 and a subscriber telephone line 10.
[0014]
The center-side exchange 4 houses the centralized monitoring center 2. The automatic alerting device-side exchange 5 houses the automatic alerting device 1 and has a no-ringing trunk (NRT) 6 added thereto. The automatic alerting device 1 is dialed from the centralized monitoring center 2 to the NRT 6 in a procedure according to the no-ringing method. Call to.
[0015]
Reference numeral 7 denotes a telephone connected to the subscriber's telephone line 10 via the automatic notification device 1.
[0016]
Reference numeral 8 denotes a meter which measures the usage of water, electric power, or the like, and is connected to the automatic notification device 1 to output a pulse signal corresponding to the usage amount, or to connect with the automatic notification device 1. It has a function of performing data communication between the devices.
[0017]
A sensor 9 detects a state change of a certain event such as a gas, a liquid level, a push button, etc., and is connected to the automatic notification device 1 and outputs a signal corresponding to each state change. have.
[0018]
In FIG. 2, reference numeral 27 denotes a storage operation device which controls the operation of the automatic notification device 1 according to a preset and stored procedure.
[0019]
Reference numeral 11 denotes a bell detection 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 outputs a 16Hz signal from the telephone line network 3 when there is an incoming call. It has a function of detecting a bell signal and transmitting it to the storage operation device 27.
[0020]
Numeral 12 denotes a slow polarity reversal detection circuit which is inserted into the subscriber telephone line 10 and connected to the storage arithmetic unit 27, and operates the NRT 6 to generate a gentle polarity reversal in the subscriber telephone line 10. It has a function of detecting the fact and transmitting it to the storage operation device 27.
[0021]
Reference numeral 13 denotes a line current detection circuit which is inserted into the subscriber's telephone line 10 and is connected to the storage operation device 27. The telephone 7 responds to a 16 Hz bell signal transmitted from the telephone line network 3. When the line is closed, the line current flowing through the subscriber telephone line 10 is detected and transmitted to the storage operation device 27.
[0022]
Reference numerals 14 and 15 denote capacitors and transformers, respectively. 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.
[0023]
The capacitor 14 provides DC insulation, and the transformer 15 has a high AC impedance, so that an interface for transmitting a signal to a PB signal detection circuit 16, which will be described later, without affecting the communication state of the subscriber telephone line 10. Circuit.
[0024]
Reference numeral 16 denotes 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 operation device 27, respectively. This is a circuit for detecting and discriminating the incoming PB signal and transmitting it to the storage operation device 27. For example, a circuit using a PB signal receiver LSI is used.
[0025]
Reference numeral 17 denotes a rectifier circuit, which has a function of supplying a fixed polarity to a half-loop circuit 18 and a DC closing circuit 20 , which will be described later, even if the polarity of the subscriber telephone line 10 is reversed.
[0026]
Reference numeral 18 denotes a half-loop circuit, which is connected to the subscriber telephone line 10 via the rectifier circuit 17 and is also connected to the storage arithmetic unit 27 and an AC600 Ω switch 19 described later.
[0027]
The half-loop circuit 18 is a circuit for responding in a procedure according to the no-ringing method. Under the control of the storage operation device 27, when a line current of 5 mA or more and 20 mA or less flows, the half loop circuit 18 has a DC resistance value of 4 KΩ or more. The telephone line 10 in a semi-closed state.
[0028]
Reference numeral 21 denotes a 600 Ω transformer, one end of a primary winding is connected to each of an AC 600 Ω switch 19 and a DC closing circuit 20 described later, and the other end is connected to the subscriber telephone line 10 via the rectifier circuit 17. Have been. The secondary winding is connected to a PB signal transmission circuit 22 and a signal modulation / demodulation circuit 23 which will be described later.
[0029]
The primary winding of the 600 Ω transformer 21 is a transformer having a DC resistance of about 50 Ω to 100 Ω and an AC impedance of 600 Ω in a frequency band of 300 Hz to 4 KHz and a primary to secondary turns ratio of 1: 1. Signals of a PB signal transmission circuit 22 and a signal modulation / demodulation circuit 23, which will be described later, are transmitted in a 600Ω balanced state with the line 10, and the subscriber telephone line 10 and a circuit connected to the secondary side of the transformer are DC-insulated. Has functions.
[0030]
Reference numeral 19 denotes an AC 600 Ω switch, which is connected to the half-loop circuit 18 and one end of the primary winding of the 600 Ω transformer 21 , and further connected to the storage operation device 27.
[0031]
The AC 600 Ω switch 19 is a switch for connecting the 600 Ω transformer 21 in an AC manner when the half-loop circuit 18 is in a half-closed state in a DC manner, and is controlled by the storage arithmetic unit 27.
[0032]
Reference numeral 20 denotes a DC closing circuit, one end of which is connected to the subscriber telephone line 10 via the rectifier circuit 17 and the other end is connected to one end of a primary winding of the 600Ω transformer 21 and It is also connected to the storage operation device 27.
[0033]
The DC closing circuit 20 is a switch that is turned on / off under the control of the storage arithmetic unit 27. When the switch is turned on, the subscriber telephone line 10 is closed via the rectifier circuit 17 with the DC resistance 50Ω to 100Ω of the 600Ω transformer 21. At the same time, an equilibrium state with an AC impedance of 600Ω is established, and the subscriber's telephone line 10 can be put into a talking state, and if turned off, the line can be opened.
[0034]
Also, it has a function of transmitting a dial pulse signal by turning on / off at an appropriate timing under the control of the storage arithmetic device 27.
[0035]
Reference numeral 22 denotes a PB signal transmission circuit, which is connected between the secondary winding of the 600Ω transformer 21 and the storage operation device 27, and outputs a PB signal via the 600Ω transformer 21 under the control of the storage operation device 27. The circuit has a function of transmitting a PB dial signal, transmitting a PB signal of an ANS signal "#" according to an incoming call procedure based on a no-ringing method, and transmitting data using a PB signal.
[0036]
Reference numeral 23 denotes a signal modulation / demodulation circuit, which is connected between the secondary winding of the above-mentioned 600Ω transformer 21 and the above-mentioned storage operation device 27. This is a circuit for performing data communication with the centralized monitoring center 2 via the subscriber's telephone line 10 and the telephone line network 3. For example, a circuit using an FSK signal type full-duplex modem LSI is used.
[0037]
Reference numeral 24 denotes a relay switch for switching the telephone 7 from the subscriber telephone line 10 to an off-hook detection circuit 26 of the automatic notification device 1 when the automatic notification device 1 is communicating.
[0038]
Reference numeral 25 denotes a relay drive circuit, an output side of which is connected to the relay switch 24 and an input side of which is connected to the storage operation device 27. It is.
[0039]
Reference numeral 26 denotes an off-hook detection circuit, the input side of which is connected to the relay switch 24 and the output side of which is connected to the storage operation device 27. The automatic notification device 1 is communicating according to the instruction of the storage operation device 27, and the telephone 7 detects off-hook. This circuit detects the off-hook of the telephone 7 when it is switched to the circuit 26 side.
[0040]
Reference numeral 28 denotes a meter interface circuit, which is connected between the meter 8 and the storage operation device 27 and receives a pulse signal from the meter 8 or communicates with the meter 8 to perform the storage operation operation. 27.
[0041]
Reference numeral 29 denotes a sensor interface circuit which is connected between the sensor 9 and the storage operation device 27 and has a function of receiving a signal from the sensor 9 and transmitting the signal to the storage operation device 27. Circuit.
[0042]
Reference numeral 30 denotes a data registration interface circuit, which is connected between a data registration device 32 and the storage operation device 27 described later, takes in data from the data registration device 32, and transmits the data to the storage operation device 27. It is a circuit having a function.
[0043]
Reference numeral 31 denotes a connector, which is connected between a data registration device 32 to be described later and the data registration interface circuit 30 described above. The connector 31 has a function of freely attaching and detaching the data registration device 32 to be described later and the automatic notification device 1. Things.
[0044]
A data registration device 32 is connected to the automatic notification device 1 and registers, stores, and changes data for performing the operation.
[0045]
For example, in addition to the telephone number of the centralized monitoring center 2 and the user code of the automatic notification device 1, an NRS signal (in "0 to 9") for selecting the automatic notification device 1 when a call arrives in a no ringing system. ), A first identification signal (a single-digit number PB signal) transmitted from the centralized monitoring center 2 to select the automatic notification device 1 when a call is received by the ringing method, and a second identification signal. A device that registers, stores, and changes an identification signal (a 4-digit PB signal) and a communication start control signal (a 4-digit PB signal), and can be detachably attached to the automatic notification device 1 by the connector 31. .
[0046]
Next, with reference to FIGS. 2, 3 and 4 of the present embodiment, an operation when a call is received on the subscriber telephone line 10 to which the automatic notification device 1 is connected will be described.
[0047]
First, at A1, the incoming call is detected by monitoring the occurrence of polarity reversal in the subscriber telephone line 10.
[0048]
Here, when the polarity reversal is detected by the gentle polarity reversal detection circuit 12, the timer of 350 ms is started at A2 and A3, the half loop circuit 18 is closed, and a response is made to the polarity reversal detection.
[0049]
Subsequently, in the flow of A4-A5-A4, within 350 mS, an NRS signal which is a single digit PB signal of "0-9" is transmitted from the NRT 6 of FIG. Monitoring is performed by the PB signal detection circuit 16 via the transformer 15.
[0050]
At this time, if the NRS signal can be detected within 350 mS, it is determined that the call has been received by the no-ringing method, and the processing after A6, which is a response procedure according to the no-ringing method, is executed.
[0051]
On the other hand, if the NRS signal cannot be detected within 350 mS, it is determined that the call has been received by the ringing method, and the processing after B1 which is a response procedure based on the ringing method is executed.
[0052]
If an NRS signal is detected within 350 mS, it is determined whether the NRS signal detected at A6 matches the NRS signal previously stored and registered in the storage operation device 27 by the data registration device 32.
[0053]
If the NRS signals do not match, it is determined that the automatic notification device 1 has not been selected, and the process jumps to A12 to release the semi-closed state of the half-loop circuit 18 and ends a series of operations.
[0054]
When the NRS signals match, the AC 600Ω switch 19 is turned on at A7 to balance the AC impedance of the subscriber telephone line 10 at 600Ω, and the response procedure is based on the no-ringing method from the PB signal transmission circuit 22 at A8. The ANS signal (one digit of the PB signal “#”) of the response signal is transmitted to the NRT 6 of FIG. 1 through the above-mentioned 600Ω transformer 21, AC600Ω switch 19, half loop circuit 18, rectifier circuit 17, and subscriber telephone line 10.
[0055]
Next, in the flow of A9-A10-A9, the signal modulation / demodulation circuit 23 causes the above-described 600Ω transformer 21, AC600Ω switch 19, half loop circuit 18, rectifier circuit 17, subscriber telephone line 10, and telephone network 3 to pass through. It communicates with the centralized monitoring center 2.
[0056]
When the communication is completed, the AC 600 Ω switch 19 and the half loop circuit 18 are opened to terminate a series of operations. A11-A12-END.
[0057]
The processing in the case of receiving a call in the no ringing method has been described above.
[0058]
Next, a case where a call is received by the ringing method will be described.
[0059]
When an incoming call is received by the ringing method, since the NRS signal cannot be detected within 350 ms in A4-A5-A4, the processing in B1 to B20 is performed thereafter.
[0060]
At B1, the half-loop circuit 18 is opened, and the incoming call procedure based on the no ringing method is completed.
[0061]
At B2, the bell timer is started. The bell timer is a restriction timer for terminating the ringing procedure when the bell does not ring for more than a set time.
[0062]
Next, the bell detection circuit 11 monitors the bell ringing intermittently in the flow of B3-B4-B5-B7-B3 or B3-B6-B7-B3 , and counts the number of rings of the bell in B4. At the same time, the line current detection circuit 13 monitors whether the telephone 7 goes off-hook and a line current flows through the subscriber telephone line 10.
[0063]
Here, if the bell stops before the telephone 7 answers, the bell timer times out in the processing of B3-B6-B7-B3, so that B6-END is reached and the response procedure ends.
[0064]
Next, when the telephone 7 responds to the bell and goes off-hook and the line current flows, it is determined in B9 whether or not the number of ringing of the bell n and the preset value c have been matched. If not, it is determined that the telephone 7 is not an automatic answering device such as an answering machine, and the identification signal from the centralized monitoring center 2 is monitored by the transformer 15 and the PB signal detection circuit 16 via the capacitor 14 in B12.
[0065]
If n and c match in B9, it is determined that the telephone 7 is an automatic answering device such as an answering machine , and the DC closing circuit 20 is turned on in B10 and B11, and the telephone 7 is connected from the subscriber telephone line 10. The relay drive circuit 25 is operated so as to be disconnected, the DC closing circuit 20 is turned on, and the identification signal from the centralized monitoring center 2 is monitored at B12 .
[0066]
Identification signal is a 4-digit number of digits of the PB signal for specifying the automatic call device 1, match and compare four digits of the detected registered stored in advance in the storage operation unit 27 B12 If the timer B times out in the flow of B14-B15-B16-B17-B15 , a communication start signal from the centralized monitoring center 2 is waited at B16 . During this time, the centralized monitoring center 2 sends a communication to the user, and then sends a communication start signal.
[0067]
The communication start signal is a 4-digit number of the PB signal. When the communication start signal is detected by the PB signal detection circuit 16, it is compared with the 4-digit number previously registered and stored in the storage operation device 27 at B16 , and when they match, the telephone is set at B18 / B19. 7 is disconnected from the subscriber's telephone line 10 , the relay drive circuit 25 is operated, the DC closing circuit 20 is turned on at B18, and the signal modulating / demodulating circuit 23 uses the 600Ω transformer 21 and the DC closing circuit 20 at B20 and B21. , rectifier circuit 17, communicates with the centralized monitoring center 2 subscriber line 10, and via the telephone network 3. When the communication is completed, the relay switch 24 is switched at B22 and B23 , the DC closing circuit 20 is turned off, the DC circuit of the subscriber telephone line 10 is opened, and the process ends.
[0068]
Identification signal from the central monitoring center 2 B1 2 is the case can not be detected during the time up of the timer A, return the relay switch 24 to the initial state in the flow of B13-B22-B23, the DC閉結circuit 20 It turns off and opens the DC circuit of the subscriber telephone line 10, and ends. If the communication start signal is not detected during the time-out of the timer B, the relay switch 24 is returned to the initial state in the flow of B17-B22-B23, and the response procedure ends.
[0069]
If the communication start signal from the center cannot be detected in B17 at the time when the timer B times out, the process proceeds to B22 / B23 to perform end processing.
[0070]
The preset value c is determined by checking the number of times the bell, such as an answering machine, that automatically responds to a device that automatically responds, and the data registration device 32 sets the value in the storage arithmetic device 27. Good.
[0071]
As another method, the set value c stores the number of times of the last ringing of the bell by the storage arithmetic unit 27, and stores the number of ringing of the bell up to the off-hook this time. It can be determined that there is a high probability that a device that automatically responds to the set value is connected. Therefore, the setting value c can be automatically obtained by using a program that learns in this manner. By doing so, there is no need to set the set value c in advance.
[0072]
【The invention's effect】
As described above, according to the present invention, if there is a bell signal due to a call from the centralized monitoring center and the automatic reporting device detects the off-hook of the telephone, the automatic reporting device sets the number of detected bell signals at that time in advance. Judges whether it matches the set value, and if it matches, judges that an automatic answering device such as an answering machine is connected, and temporarily disconnects the phone from the subscriber's telephone line. Controls the operation to prevent noise from automatic answering sounds from answering machines, etc., so that identification signals transmitted from the centralized monitoring center are not erroneously detected and communication with the centralized monitoring center can be performed reliably. .
[0073]
In addition, when a telephone other than the answering machine answers, the telephone is not disconnected from the subscriber's telephone line, so that the user does not feel uncomfortable using the telephone.
[Brief description of the drawings]
FIG. 1 is a system configuration diagram of an automatic notification system according to an embodiment of the present invention.
FIG. 2 is a block diagram of an automatic notification system according to an embodiment of the present invention.
FIG. 3 is an operation flowchart in the automatic notification system according to the embodiment of the present invention.
FIG. 4 is an operation flowchart in the automatic notification system according to the embodiment of the present invention.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 automatic notification device 2 centralized 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

Claims (1)

The data of the meter (8) and the sensor (9) are automatically transmitted to the centralized monitoring center (2) via the subscriber telephone line (10), and the centralized monitoring center (2) transmits the subscriber telephone line ( 10) In an automatic notification system having a mutually activated automatic notification device (1) connected to a user's telephone (7), which can transmit data via the automatic notification device (1), the automatic notification device (1) is connected to the centralized monitoring center (2). A bell detection circuit (11) for detecting a bell signal for calling the automatic notification device (1) via the subscriber telephone line (10); and a line current detection circuit (13) for detecting off-hook of the telephone (7). the telephone set relay switch detach from (7) the subscriber telephone line (10) (24), PB signal detection circuit for detecting a communication start signal and the identification signal transmitted from the central monitoring center (2) 16), and a DC閉結circuit閉結in DC resistance of the subscriber telephone line (10) (20), a signal demodulation circuit which performs data transmission (23), a storage operation unit for controlling the respective circuits (27) with the door, the storage operation unit when detecting a bell signal (27) starts counting the detection number of the ringing signal, et detecting the off-hook signal of the telephone (7) by the line current detection circuit (13), wherein It is determined whether or not the number of times the bell signal is detected matches a preset value. If the number is detected, the DC closing circuit (20) is turned on, and at the same time, the telephone (7) is connected to the subscriber's telephone line ( the cleavage from 10), then, after receiving the identification signal by PB signal detection circuit (16), upon receiving the communication start signal, performs data transmission by signal demodulation circuit (23), also, Bell If the number of signal detections does not match the set value, then, after receiving the identification signal by the PB signal detection circuit (16), and receiving the communication start signal, data transmission is performed by the signal modulation / demodulation circuit (23). Automatic notification system characterized by performing control as follows.

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