JP3432913B2 - Automatic notification system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to meter values and sensor information.
And other information signals from the automatic reporting device via the telephone network.
Automatic transmission to the centralized monitoring center and centralized monitoring
Call the automatic reporting device from the center side and load data
Has a mutual activation type automatic notification device that can perform
The present invention relates to an automatic notification system. [0002] 2. Description of the Related Art Conventionally, a self-service telephone using a general subscriber's telephone line is used.
In an automatic reporting system with a video reporting device,
When calling the automatic reporting device from the viewing center,
Ring the bell of the telephone at home using the ringing trunk
Call the target automatic reporting device without
Method and normal without using a ringing trunk
Dial to ring the bell on the phone and
There is a method to call the device (hereinafter called the ringing method).
Was. [0003] The no-ringing system is used in telephone exchanges.
No-ringing trunk with special function (NRT and
Is a special service realized by adding
No bell signal is used.
-Purpose by ringing call signal (PB signal 1 digit)
Data communication is performed by specifying the automatic notification device of
As a known example of an automatic notification device utilizing the
There is Japanese Patent Publication No. 165 (terminal device of a network control device). [0004] In addition, a desired automatic communication is performed without using the NRT.
An example of a ringing method for calling the
Data communication within a certain time after automatically responding to
If an identification signal indicating that the
In this case, connect the data communication terminal to the line where the call was received.
There is a well-known example of such a thing is Japanese Patent Publication No. 53-2282.
There is an official gazette (communication system in telephone line).
If the target signal cannot be detected
Simultaneous with sending 16Hz bell signal to terminal (telephone)
Ring back tone or telephone to the calling party
By sending a message indicating that
And a method to select between home telephones and data communication terminals
There are those that have been given, as well-known examples of such
Is disclosed in JP-A-2-7763 (image communication apparatus). [0005] The no-ringing method is
Not available for all telephone lines, NRT
Automatically report to lines without PBX or PBX extension
If a device is installed, call this automatic reporting device.
Cannot be issued, which limits the operation of the automatic notification device.
I do. In addition, N
RT is used for other communications by continuous meter reading, etc. and busy
I can not call the automatic notification device even in the state. [0006] In particular, emergency operation from the center to the automatic notification device.
This busy state is inconvenient if you want to work. Therefore, how to call by a normal dial
After the phone rings the phone in a formula and responds,
Data will be sent to the user between the automatic reporting device and the center.
After explaining from the center that data communication will be performed and obtaining consent,
A method that sends an identification signal and connects the line to the automatic reporting device
Will notify the center if the user has an answering machine.
Automatically when the answering machine answers the call from
The caller is answered with a guidance voice for answering.
The notification device is receiving the call identification signal from the center.
Then, the identification signal sent from the center and the answering machine are
Automatic notification device because guidance voice to be sent is received at the same time
Could not receive the identification signal. [0008] The present invention solves the above problems.
Meter and sensor data for centralized monitoring
Automatically via the telephone network to the
The telephone network from the central monitoring centerSubscriber telephone line
Can transmit data via, Connect to the user's home phone
WasAutomatic notification system with mutual activation type automatic notification device
In theThe automatic reporting deviceFrom the centralized monitoring center
Bell call to call the automatic reporting device via the telephone network
Signal and bell off-hook
Line current detection circuit to output the telephone
A relay switch that cuts off the wireFrom the centralized monitoring center
SentPB signal detection circuit for detecting an identification signalAnd
DC closing circuit for connecting DC circuit to incoming telephone line
And a signal modulation / demodulation circuit for performing data transmission, and each circuit
And a storage operation device that controlsThe bell call signal
If detectedThe storage operation unit isEnter the operation mode and
If an off-hook signal is detected, switch the telephone to the subscriber's telephone line.
ReleaseAnd the subscriber's telephone
Connect the DC circuit to the line, thenThe first of the identification signals
After receiving the identification signal, after receiving the second identification signal,
Start timer C andTelephone to subscriber telephone
Connect to the lineActivate the DC closing circuit to activate the subscriber telephone
Open the DC circuit connected to the line,Then sent out
Communication start control signal of the identification signalIf you receive
Is a DC closed circuit when timer C times out
To connect a DC circuit to the subscriber's telephone line.
First, disconnect the telephone from the subscriber's telephone line and restore the signal.
Data transmission by the keying circuit,First identification signal
If the telephone cannot be received, connect the telephone to the subscriber's telephone line.
It was controlled to continue. [0009] According to the present invention, there is provided the above-mentioned configuration, in which
If the mobile phone detects that the telephone is off-hook,
The automatic reporting device disconnected from the telephone line is the first from the center
Waits for the reception of the identification signal. If reception is not possible within a certain period of time,
Connect the telephone to the telephone line and the automatic
You. Receive second identification signal after receiving first identification signal
Phone, connect the phone to the phone line and continuecommunication
Start control signalThe center waits for the reception of the
After communicating by talk, receive a communication start control signal
Disconnects the telephone from the telephone line and prevents communication
Then, the communication state with the center is established. [0011] BRIEF DESCRIPTION OF THE DRAWINGS FIG.
I will explain. FIG. 1 shows an embodiment of an automatic notification system according to the present invention.
System diagram showing an example, Fig. 2 shows the configuration of the automatic notification system
FIG. 3 is a block diagram showing the same flowchart.
is there. In FIG. 1, reference numeral 1 denotes an automatic notification device;
A centralized monitoring center 2 for managing various information signals on the terminal side;
Connected via telephone network 3 and subscriber telephone line 10
Have been. The center-side exchange 4 receives the centralized monitoring center 2.
It is acceptable. The automatic notification device-side exchange 5 includes the automatic notification device 1
And no ringing trunk (NRT) 6
Is added to the central monitoring center 2 to NRT6.
Automatically by dial according to no ringing method
A call is received to the notification device 1. Reference numeral 7 denotes a telephone via the automatic notification device 1.
It is connected to the subscriber telephone line 10. Reference numeral 8 denotes a meter for measuring the amount of water, electric power, etc. used.
It is for reading the meter, and is connected to the automatic reporting device 1 described above.
It outputs pulse signals according to each usage amount,
Or a device that performs data communication with the automatic notification device 1 described above.
Has ability. Reference numeral 9 denotes a sensor, for example, gas or liquid level.
To detect a change in the state of an event, such as
It is connected to the automatic notification device 1
It has a function of outputting a signal corresponding to a state change. In FIG. 2, reference numeral 27 denotes a storage operation device,
The operation control of the automatic notification device 1 is set and stored in advance.
In accordance with the procedure described above. Reference numeral 11 denotes a circuit for detecting a 16 Hz bell signal.
Between the subscriber telephone line 10 and the storage arithmetic unit 27.
Is connected to the telephone network 3 when there is an incoming call.
The transmitted 16 Hz bell signal is detected and stored.
It has a function of transmitting to the arithmetic unit 27. Reference numeral 12 denotes a slow polarity reversal detection circuit,
The storage operation device, which is inserted into the telephone line 10
27, and the NRT 6 operates to operate the
Detects the occurrence of gentle polarity reversal in the incoming telephone line 10
It has a function of transmitting to the storage operation device 27. Reference numeral 13 denotes a line current detection circuit,
The storage operation device 2
7 and the telephone 7 is connected to the telephone network 3
Line in response to the 16Hz bell signal
A line that flows through the subscriber's telephone line 10 when closed
A function of detecting a current and transmitting the detected current to the storage arithmetic device 27;
Have. Reference numerals 14 and 15 denote capacitors and transistors, respectively.
A transformer 15 is connected between the subscriber's telephone lines 10 by a lance.
A primary winding is connected, and one of the primary windings
The capacitor 14 is connected. The capacitor 14 provides DC insulation and
The impedance 15 has a high AC impedance.
Influences the call state of the subscriber telephone line 10.
The signal is transmitted to the PB signal detection circuit 16 described later without any problem.
An interface circuit. Reference numeral 16 denotes a PB signal detection circuit, one end of which is the aforementioned T
The other end is connected to the secondary winding of the lance 15 and
Respectively connected to the predicate storage arithmetic unit 27, and
The PB signal transmitted to the subscriber telephone line 10 is detected and detected.
This is a circuit for separately transmitting to the storage operation device 27,
For example, a circuit using a PB signal receiver LSI is used.
ing. Reference numeral 17 denotes a rectifier circuit, which is a subscriber telephone line described above.
Even if the polarity of 10 is inverted, a half loop circuit 18 described later,
A function for supplying a certain polarity to the DC closing circuit 19 is provided.
Have. Reference numeral 18 denotes a half-loop circuit,
Connected to the subscriber's telephone line 10 via
On the other hand, the storage operation device 27 and an AC600Ω switch
Switch 19 is also connected. The half loop circuit 18 is of a no ringing type.
This is a circuit for responding according to the procedure according to
The line power of 5 mA or more and 20 mA or less
Subscriber with a DC resistance value of 4KΩ or more when flowing current
It has a function of bringing the telephone line 10 into a semi-closed state. Reference numeral 21 denotes a 600 Ω transformer, one of the primary windings.
The end is an AC 600Ω switch 19 and a DC closing circuit described later.
20 and the other end is rectified
Connected to the subscriber's telephone line 10 via a circuit 17
I have. The secondary winding is connected to a PB signal transmission circuit 22 and a signal
Signal modulation / demodulation circuits 23. The primary winding of the 600Ω transformer 21 is 50Ω
DC resistance of about 100Ω and 300Hz to 4KHz
It has an AC impedance of 600Ω in the wave number band and has a primary: 2
The next turns ratio is 1: 1 transformer, and the subscriber telephone
PB signal sending circuit 2 described later in a state of equilibrium with line 10 and 600Ω
2 and the signal of the signal modulation / demodulation circuit 23, and
The time connected to the incoming telephone line 10 and the secondary side of the transformer
It has the function of DC-insulating the road. Reference numeral 19 denotes an AC 600 Ω switch,
Loop circuit 18 and one of the primary windings of the aforementioned 600Ω transformer.
A switch connected to the end, and further the storage arithmetic unit
27. The AC 600 Ω switch 19 is a half loop
When the circuit 18 is in a semi-closed DC state,
A switch that connects the above mentioned 600Ω transformer 21
Are controlled by the storage arithmetic unit 27. A DC closing circuit 20 has one end connected to the rectifying circuit.
Connected to the subscriber's telephone line 10 via
And the other end is one end of the primary winding of the aforementioned 600Ω transformer 21
, And also to the storage operation device 27
Have been. The DC closing circuit 20 is provided with
Switch that is turned on / off by the control of
The subscriber telephone line 10 is connected via the rectifier circuit 17 to the
Closed with DC resistance of 50Ω to 100Ω of transformer 21
And balanced state with AC impedance of 600Ω
And the subscriber telephone line 10 can be put into a call state,
If it is turned off, the line can be opened. Also, under the control of the storage arithmetic unit 27,
By turning on / off at appropriate timing, dial
It also has the function of sending a loose signal. Reference numeral 22 denotes a PB transmission circuit,
Connected between the secondary winding of the impedance 21 and the storage arithmetic unit 27
The above-mentioned 6 is controlled by the storage arithmetic unit 27.
A circuit that outputs a PB signal via a 00Ω transformer 21
Compliant with PB dial signal transmission and no ringing
PB signal transmission of ANS signal "#" in the same incoming procedure
In addition, it has a function to send data using PB signal.
ing. Reference numeral 23 denotes a signal modulation / demodulation circuit, which is a 600 Ω
The connection between the secondary winding of the lance 21 and the memory
Has been continued. Reference numeral 23 denotes a signal modulation / demodulation circuit,
By controlling the device 27, the aforementioned 600Ω transformer 21 and rectifier
Via circuit 17, subscriber telephone line 10, telephone line network 3
A circuit that performs data communication with the centralized monitoring center 2.
For example, a circuit using an FSK signal type full-duplex modem LSI
Is used. Reference numeral 24 denotes a relay switch,
When the telephone is communicating, the telephone 7 is connected to the subscriber telephone line 10.
Off-hook detection circuit to be described later on the automatic notification device 1 side from the side
It switches to the 26 side. Reference numeral 25 denotes a relay drive circuit whose output side is the aforementioned relay drive circuit.
To the memory switch 27 and the input side to the memory
Are connected to each other and controlled by the storage operation device 27.
Drive the above-mentioned relay switch 24 to switch the switch
This is a circuit that performs 26 is an off-hook detection circuit, the input side of which is
And the output side is connected to the storage arithmetic unit 27.
Connected to each other and indicated by the
And the telephone 7 is turned off.
When the switch is switched to the
7 is a circuit for detecting off-hook. Reference numeral 28 denotes a meter interface circuit,
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 the storage arithmetic unit 27
It has the function of transmitting. Reference numeral 29 denotes a sensor interface circuit,
Connected between the sensor 9 and the storage arithmetic unit 27
Receiving the signal from the sensor 9 and
A circuit having a function of transmitting the data to the memory operation device 27.
is there. 30 is a data registration interface circuit
The data registration device 32 and the storage operation device 27 described later
Data from the data registration device 32
And this data is stored in the storage
This is a circuit that has the function of transmitting data to Reference numeral 31 denotes a connector, which will be described later in the data registration device 3.
2 and the data registration interface circuit 30
The connector 31 is connected to the data registration device 3 described later.
Function to freely attach / detach 2 to / from the automatic notification device 1
It has. Reference numeral 32 denotes a data registration device, which is an automatic notification device described above.
Is connected to the device 1 and the data for performing the operation is
Registration, storage and modification. For example, the telephone number of the centralized monitoring center 2
And the user code of the automatic notification device 1
When an incoming call is received by the ringing method,
NRS signal for selection (1 digit number in "0-9")
Centralized monitoring when a call arrives in the ringing mode
Sent from the center 2 to select the automatic notification device 1
A first identification signal (a PB signal of a one-digit number)
Identification signal (4-digit number PB signal) and communication start control signal
Device for registering, storing and changing (4-digit PB signal)
Then, the connector 31 attaches to and detaches from the automatic notification device 1.
Can be installed freely. Next, referring to FIGS. 2 and 3 of this embodiment,
To the subscriber telephone line 10 to which the automatic reporting device 1 is connected.
The operation when there is an incoming call will be described. First, at A1, polarity is applied to the subscriber's telephone line 10.
An incoming call is detected by monitoring the occurrence of inversion. Here, the polarity inversion is detected by the gradual polarity inversion detection circuit 1.
2 and 350mS tie at A2 and A3
Start the circuit, close the half-loop circuit 18 and set the polarity
Responds to inversion detection. Subsequently, in the flow of A4-A5-A4, 350
Within milliseconds from the NRT 6 in FIG.
The NRS signal which is a single digit PB signal of “0-9” is transmitted.
Or via the capacitor 14 and the transformer 15
Monitoring is performed by the B signal detection circuit 16. At this time, the NRS signal is generated within 350 ms.
If the call can be detected, the
Response procedure according to the no-ringing method.
A6 and subsequent steps are executed. On the other hand, the NRS signal is detected within 350 ms.
If the call cannot be made, the incoming call is ringing.
Response procedure according to the ringing method
The processing after B1 is executed. Now, suppose that the NRS signal is within 350 ms.
If it can be detected, the NRS signal detected at A6 is
Stored in the storage operation device 27 in advance by the data registration device 32
It is determined whether it matches the registered NRS signal. If the NRS signals do not match,
It is determined that the motion notification device 1 has not been selected, and the process proceeds to A12.
Jump to open the semi-closed state of the half-loop circuit 18
A series of operations ends. If the NRS signals match, at A7
Turn on the AC600 Ω switch 19 and switch to the subscriber's telephone line 1
Balance the AC impedance of 600Ω at 0, and at A8
The PB signal transmission circuit 22 conforms to the no-ringing method.
ANS signal (PB signal “#”) of the response signal which is the response procedure
1 digit) with the above-mentioned 600Ω transformer 21, AC600Ω switch.
Switch 19, half loop circuit 18, rectifier circuit 17, subscriber
The data is transmitted to the NRT 6 in FIG. Next, in the flow of A9-A10-A9, the signal is changed.
By the demodulation circuit 23, the above-mentioned 600Ω transformer 21, A
C600Ω switch 19, half loop circuit 18, rectifier circuit
17, via the subscriber telephone line 10 and the telephone network 3
It communicates with the centralized monitoring center 2. When communication is completed, an AC 600Ω switch
19, and release the half loop circuit 18 to end a series of operations.
Complete. A11-A12-END. As described above, when a call is received by the no ringing method
Has been described. Next, when a call is received by the ringing method,
Will be described. When the call is received by the ringing method, A4-A
NRS signal cannot be detected within 350 ms in 5-A4
Therefore, the processing of B1 to B20 is performed thereafter. At B1, the half loop circuit 18 is opened and the
The ringing-type incoming call procedure ends. At B2, the bell timer is started. bell
Timer rings if the bell does not ring for more than the set time
Timer to terminate the incoming procedure by
You. Next, B3-B4-B6-B3 or B3
-The bell is sounding intermittently in the flow of -B5-B6-B3.
Is monitored by the bell detection circuit 11 and the power
The telephone 7 goes off-hook and connects to the subscriber's telephone line 10
The line current detection circuit 13 monitors whether the current flows or not.
I have. Here, the bell stops before the telephone 7 answers.
If it has, use B3-B5-B6-B3
Since the bell timer times out, it becomes B5-END.
End the response procedure. Next, the telephone 7 responds to the bell and
When a line current flows, B7-B8-B9-B10-B11
To disconnect the telephone 7 from the telephone line 10
Operate the drive circuit 25 and turn on the DC closing circuit 20 before turning it on.
A first identification signal from the centralized monitoring center 2
14 to a transformer 15 and a PB signal detection circuit 16
Monitor more. The first identification signal is one digit of the number of the PB signal.
It is a continuous signal, and when detected, B12-B13-B14
The second identification signal is monitored according to the flow of (1). Second
The identification signal is a 4-digit PB signal for identifying the terminal device.
B15-B16-B17 when detected.
Drive to connect the telephone 7 to the telephone line 10
Drive circuit 25 to turn off the DC
The monitoring of the communication start control signal is performed by the aforementioned capacitor 14 and the transformer.
15 and the PB signal detection circuit 16
Monitor at high impedance that does not affect line 10.
Subsequently, in B18-B19, the data registration device 32 previously described
The communication start system registered and stored in the storage arithmetic unit 27
Compare with control signal. When the first identification signal is not detected,
Or, the timer A is tied while the first identification signal does not match.
To connect the telephone 7 to the telephone line 3
Activate the relay drive circuit 25 and use the ringing method.
End the incoming call procedure. However, the start of timer A is
The line current is detected. When the second identification signal is not detected,
Or, the timer B is tied while the second identification signal does not match.
To connect the telephone 7 to the telephone line 3
Activate the relay drive circuit 25 and use the ringing method.
End the incoming call procedure. However, the start of timer B is
The line current is detected. On the other hand, in B18, the four digits of the communication start control signal
The PB signal of the character is stored and calculated by the data registration device 32 in advance.
Compare with communication start control signal registered and stored in device 27
And if they match, the ringing method
It is determined that there is an incoming call from the middle monitoring center 2 and the following B2
0-B25-END processing is performed.In addition, communication with B18
If the start control signal cannot be detected, the timer C
In the same way, the following processing of B20 to B25-END
I do.However, when the timer C is started, the second identification signal is output.
It is at the time of detection. In B24, the telephone 7 is connected to the telephone line 3.
Therefore, the relay drive circuit 25 is operated. Subsequently, in B21, the relay drive circuit 2
5 to switch the relay switch 24
Disconnect the telephone 7 from the subscriber telephone line 10
Then, it switches to the off-hook detection circuit 26. Subsequently, the flow of B22-B23-B22
The signal modulation and demodulation circuit 23 uses the above-described 600Ω transformer.
21, DC closing circuit 20, rectifying circuit 17, subscriber telephone
Centralized monitoring center 2 via line 10 and telephone network 3
Communicates with When the communication is completed, the relay switch 2
4 to switch the telephone 7 to the subscriber telephone line 10
To the subscriber telephone line by turning off the DC closing circuit 20
Release 10 and execute the flow of B24-B25-END
To end a series of operations. Therefore, the call signal of telephone 7 is detected.
Then, the storage operation device 27 changes from the standby state to the operation state,
The telephone 7 enters the off-hook detection waiting state, and
Immediately after the telephone call is detected, the telephone 7 is disconnected from the telephone network 3,
The first automatic notification device 1 sent from the centralized monitoring center 2
Waits for the identification signal of the one-digit PB signal
If it is not detected during the time, immediately turn on the telephone 7
Connect to wire network 3. Therefore, the call from the centralized monitoring center 2
If not, the telephone 7 is disconnected from the telephone network 3.
The time released can be very short. Further, if detected, the second knowledge is continued.
It becomes a separate signal monitor, and when it receives a 4-digit identification signal, the telephone
7 to the telephone network 3 to communicate with the central monitoring center 2.
Waits for a communication start control signal, and
After a conversation with the user, a communication start control signal is issued.
Upon receipt, communication operation can be started. Therefore, telephone calls from other than the centralized monitoring center 2
If the telephone 7 cannot be used when there is a call,
It can only be a very short time the first time you hook up
come. [0078] As described above, according to the present invention,Through
Ring the phone bell with the usual dialing method
After the user responds,
Send data communication between the automatic reporting device and the center.
After receiving the explanation from the
Although the system connects the line to the
There is a telephone answering machine installed and calls from the center
Answering machine automatically answers and emits guidance voice for answering
If an action is taken to respond to the follower,
At the timing of receiving the call identification signal from the
And the answering machine can be disconnected from the telephone line.
Signal sent from the center and the answering machine
The guidance voice sent by the
It is not possible to receive another signal. In addition,
Receiving the communication start control signal transmitted from the
The answering machine is connected to the telephone line
Communication start control signal by the guidance voice from the answering machine
Signal cannot be received, the timer C times out.
Highly reliable because you can enter data communication more
Communication can be very useful
And can be. Also, the simple structure described above
This solves the above-mentioned problems, so that
There is also an excellent effect on strike. Also, an excellent effect on cost reduction of products can be obtained.
is there.

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 of 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. [Description of Signs] 1 Automatic reporting device 2 Centralized monitoring center 3 Telephone 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 Releasing switch

Continuation of the front page (56) References JP-A-63-237656 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H04M 11/00-11/10

Claims (1)

(57) [Claim 1] Data of a meter (8) and a sensor (9) are automatically transmitted to a centralized monitoring center (2) via a telephone network (3). A centralized monitoring center (2 ) is connected to a telephone (7) at a user's home where data can be transmitted via a subscriber's telephone line (10) of the telephone network (3).
Further, in an automatic notification system having a mutual activation type automatic notification device (1), the automatic notification device (1) is provided by the centralized monitoring center (2) via a telephone network (3). , A line detection circuit for detecting off-hook of the telephone set, and disconnecting the telephone set from the subscriber telephone line. Relay switch (2
4) , a PB signal detection circuit (16) for detecting an identification signal transmitted from the centralized monitoring center (2) ,
DC closing circuit for connecting a DC circuit to the line (10)
(20) and a signal modulation / demodulation circuit for performing data transmission
(23), a storage operation device (27) for controlling each circuit,
And a storage operation device when the bell call signal is detected.
(27) enters the operation mode, and upon detecting the off-hook signal of the telephone (7), connects the telephone (7) to the subscriber telephone line (1).
With to release cut from 0), to the DC閉結circuit (20)
Connect a DC circuit to the subscriber telephone line (10)
After that, after receiving the first identification signal of the identification signal and then receiving the second identification signal , the timer C is started.
In both cases, the telephone (7) is connected to the subscriber telephone line (10), and the DC closing circuit (20) is operated to activate the subscriber telephone line.
When the DC circuit connected to (10) is opened and the communication start control signal of the identification signal transmitted thereafter is received,
Or if timer C times out,
Activate the closed circuit (20) to activate the subscriber's telephone line (10)
And a telephone (7) connected to the subscriber
Disconnect from the telephone line (10),
3. An automatic notification system for transmitting data according to 3) and controlling the telephone (7) to connect to the subscriber's telephone line (10) when the first identification signal cannot be received.