JPH0353827B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to telephone equipment, and particularly to a caller selection circuit that protects the owner of the telephone from prank calls and mistaken calls.

(b) Conventional technology When a caller makes a phone call, a ring tone sounds in response to a ring signal coming from the telephone line, and by listening to this ring tone, it is possible to recognize that a call is coming. The telephone device is configured to do so.
In such a configuration, the owner of the telephone is called not only in the case of a prank call but also in the case of a mistaken call, which is extremely unpleasant. As a way to solve this problem, a telephone device has been developed that is configured to ring only when a person who knows the PIN number makes a call.One such technique is, for example, Japanese Unexamined Patent Application Publication No. 1983-1999. There is one disclosed in Publication No. 11668.
Furthermore, when making a call, manipulating the area code and the other party's number is not only inconvenient, but also poses the problem of entering the wrong number. Telephone devices equipped with a device called an automatic dialing device, which allows calls to be made by simply pressing a single button, are in widespread use. -There is one disclosed in Publication No. 30601.

(c) Problems to be solved by the invention In the technique described above for selecting a caller using a PIN number, the PIN number is set by the owner of the telephone. There is a problem that the caller needs to be informed and the caller forgets the PIN number. The present invention seeks to provide a caller selection circuit that solves this problem.

(d) Means for Solving Problems The caller selection circuit of the present invention detects when the number corresponding to the DTMF signal sent from the caller after receiving a call matches the telephone number stored in the memory circuit. At the same time, a calling signal is emitted and the number of an automatic dialing operation button provided corresponding to the memory circuit in which the telephone number is stored is displayed on a numeric display.

(e) Effect The present invention utilizes a telephone number stored in a memory circuit provided for automatic dialing operation as a PIN number for selecting a caller, and displays the telephone number on a numeric display. This makes it possible to identify the caller based on the number.

(F) Embodiment The illustrated circuit is an embodiment of the caller selection circuit of the present invention. In the figure, 1 is a connection terminal with a telephone line, 2 is a first diode bridge circuit that rectifies a calling signal arriving from the telephone line, and 3 is a terminal to which a calling signal rectified by the first diode bridge circuit 2 is applied. 4 is a selection switch that selects operation/inoperation of the caller selection operation, and the illustrated state is a non-operation state. be.
5 is a transformer through which a calling signal from the first calling signal generation circuit 3 is applied to the first winding 6 when the selection switch 4 is in the inoperative position; 7 is a speaker for emitting the calling signal; It is connected to the second winding 8 of the transformer 5 as a load. 9 is a second diode bridge circuit provided to determine the polarity of connection with the telephone line; 10 is a hook control circuit for controlling the closing operation of the telephone line; and 11 is a telephone circuit called a speech network. , a handset 12 is connected. 13 is a dial operation button that is operated during dial operation; 14 is a dial signal generation circuit that outputs a dial signal corresponding to the number forming the dial operation button 13; 1;
5, 16, and 17 are first, second, and third operation switches that are closed by operating the automatic dialing operation buttons, respectively; 18 is a memory in which a telephone number for automatic dialing is stored; circuit,
Reference numeral 19 indicates a control circuit for controlling the storage operation and calling operation of the telephone number in the memory circuit 18 corresponding to each of the operation switches, and 20 a control circuit that controls the signal output from the first call signal generation circuit 3, which is selected by the selection switch 4. It is a control terminal that is applied when in the operating position,
When a signal from the first paging signal generation circuit 3 is applied to the control terminal 20, each operation by the control circuit 19 is started. 21
is a hook operation control signal output terminal provided in the control circuit 19 and outputting a signal to control the operation of the hook control circuit 10; when a signal is applied to the control terminal 20, the telephone line is closed. It is configured to output a signal. 22
is the hook operation control signal output terminal 2 of the control circuit 19.
Hook control circuit 10 based on the signal output from 1
a drive signal output terminal 23 to which a drive signal is output after the telephone line is closed by the operation of
2 is a response message sending circuit that becomes active when a drive signal is output to the drive signal output terminal 22, and has the function of sending a message to the calling party to prompt him or her to send his or her personal identification number. 24 is an input terminal provided in the control circuit 19 and to which a signal corresponding to the number of the dial operation button 13 is input when the telephone number is stored in the memory circuit 18; and is an output terminal to which a telephone number called from the memory circuit 18 is output during automatic dialing operation;
It is connected to the dial signal generation circuit 14. 26 is a DTMF signal receiving circuit that receives a signal transmitted as a PIN number from a caller, that is, a DTMF signal, and transmits the coded signal to the control circuit 19.
connected to output to. 27 is the above
A reception number memory circuit 28 in which the number received by the DTMF signal reception circuit 26 is stored is activated after the telephone line is closed by the hook control circuit 10, and the number is stored in the memory circuit 18. This is a number matching circuit that matches the stored telephone number with the number stored in the received number memory circuit 27, and has an output terminal 29 that outputs an H (high) level signal when the numbers match. We are prepared. In such a circuit, a subscriber number, a city code, and an area code are stored in the memory circuit 18, but the number matching circuit 2
The verification operation by 8 is performed, for example, using the subscriber number, that is, the last four digits. Reference numeral 30 indicates a second calling signal which becomes operational when an H level signal is output to the output terminal 29 of the number matching circuit 28 and which outputs a calling signal different from the calling signal output from the first calling signal generating circuit 3. The calling signal generating circuit 31 is an amplifying circuit that amplifies the calling signal output from the second calling signal generating circuit 30, and the output signal is applied to the third winding 32 constituting the transformer 5 and the telephone. It is connected so that it is applied to the circuit 11. 33 is sent by the caller through the verification operation by the number verification circuit 28.
When the DTMF signal and the telephone number stored in the memory circuit 18 match, the number of the automatic dialing operation button becomes operational and is provided corresponding to the memory circuit in which the matching telephone number is stored. This is a drive circuit that displays on the numeric display 34. In such a circuit configuration, if the number transmitted by the caller and the telephone number stored in the memory circuit 18 do not match, the hook control circuit 10 operates to disconnect the telephone line after a predetermined period of time. Configured to release closure. Further, when the calling signal outputted from the second calling signal generating circuit 30 is emitted by the speaker 7, that is, when the calling operation is being performed in accordance with the number matching operation by the number matching circuit 28, the handset 12
When the telephone is removed from the telephone, the second ringing signal generating circuit 30 becomes inoperative, and the driving circuit 33 becomes inoperative. The calling difference selection circuit of the present invention is constructed as described above, and the operation of this circuit will now be described.

First, the operation of storing a telephone number in the memory circuit 18 will be explained. Such a telephone number memorization operation is carried out by switching the first, second, and third operation switches 15, 16 while the memorization switch (not shown), which is switched only during the memorization operation, is switched to the memorization operation side.
and 17, respectively, and by operating the dial operation button 13 corresponding to the telephone number to be stored. Further, the response message sending circuit 23 has a built-in message memory circuit in which a response message is stored, and the voice of the owner of the telephone is memorized by the message storage operation. The response message is stored as, for example, "Yes, this is ○○. Please send your telephone number." As described above, the operation of storing telephone numbers and response messages in the memory circuit 18 is carried out.Next, the operation as a telephone device will be explained. First, the operation when making a phone call will be explained. When making a call to a person whose telephone number is not stored in the memory circuit 18, the call is made by operating the dial operation button 13 after removing the handset 12 from the telephone. When the handset 12 is removed from the telephone, a switch (not shown) is switched to close the telephone line, as is well known. In this state, when the dial operation button 13 is operated, a dial signal corresponding to the operation button is outputted from the dial signal generation circuit 14 and sent to the telephone line through the telephone circuit 11. The operation of making a call by operating the dial operation button 13 is performed in this way.Next, the case of making a call by automatic dialing operation will be explained. Such an operation is performed by removing the handset 12 from the telephone and operating the automatic dialing switches 15, 16, and 17 provided in correspondence with the memory in which the telephone number of the person to be called is stored. This is done by closing the button. For example, the first operation switch 15
When the first operation switch 15 is pressed and closed, the corresponding first operating switch 15 in the telephone number stored in the memory circuit 18 is pressed.
The telephone number stored in the memory corresponding to is called and applied to the dial signal generation circuit 14 through the control circuit 19. As a result, a dial signal corresponding to that number is output from the dial signal generating circuit 14 and sent to the telephone line through the telephone circuit 11. When such an operation is performed,
The owner of the telephone can call the person whose telephone number is stored in the memory circuit 18 by automatic dialing.

As described above, operations are performed when making a telephone call.Next, operations when a caller receives a telephone call will be explained. First, a case will be described in which the selection switch 4 for selecting whether to operate or not perform the caller selection operation is in the non-operating position shown, that is, when the telephone operates as a normal telephone device. When a calling signal arrives from the telephone line in the illustrated state, the calling signal is applied to the first calling signal generating circuit 3 through the first diode bridge circuit 2. As a result, the first calling signal generating circuit 3 becomes operational, and an electronic calling signal is outputted to its output terminal. The calling signal output from the first calling signal generating circuit 3 is applied to a first winding 6 constituting a transformer 5 through a selection switch 4. As a result, a ringing signal is induced in the second winding 8 that constitutes the transformer 5 and is connected to the speaker 7 as a load, and is emitted from the speaker 7 as a ringing tone. Therefore, the owner of the phone will be aware that the call is already coming.
By removing the handset 12 from the telephone set, the telephone line is closed and a conversation can be made with the caller.

As described above, the operations are performed when operating as a normal telephone device.Next, the operation when the selection switch 4 is in the operating position opposite to the illustrated state, that is, the position where the caller selection operation is performed will be explained. do. When a calling signal arrives from the telephone line when the selection switch 4 is in the operating position, the first calling signal generating circuit 3 outputs the calling signal as described above. In this state, the signal path to the first winding 6 constituting the transformer 5 is cut off by switching the selection switch 4, so that no ringing tone is emitted from the speaker 7. The calling signal outputted from the first calling signal generating circuit 3 is applied to a control terminal 20 provided in a control circuit 19 through a selection switch 4, and a control operation by the control circuit 19 is started. When a calling signal is applied to the control terminal 20 of the control circuit 19, the control circuit 1
A signal for performing the closing operation is output to the hook operation control signal output terminal 21 provided at 9,
The hook control circuit 10 performs a telephone line closing operation. After such a closing operation is performed, the drive signal output terminal 22 provided in the control circuit 19
A drive signal is output to the response message sending circuit 2.
3 is applied. The response message sending circuit 2
When a drive signal is applied to 3, the response message sending circuit 23 becomes operational and sends the message stored in the message memory circuit, ie, "Yes, this is ○○. Please send your telephone number." A message prompting the user to send the password is output and sent to the caller through the telephone circuit 11. The caller who heard such a message,
When a dial button corresponding to a telephone number is operated, a signal corresponding to each button, that is, a DTMF signal, is sent to the telephone line. The DTMF signal sent from the calling party is applied to the DTMF signal receiving circuit 26 through the second diode bridge circuit 9, the hook control circuit 10 and the telephone circuit 11. When a DTMF signal sent from the calling party is applied to the DTMF signal receiving circuit 26, a coded signal corresponding to the number is output from the DTMF signal receiving circuit 26 and input to the control circuit 19. . The signal input to the control circuit 19 is applied to the reception number memory circuit 27 through the control circuit 19 and is stored in the reception number memory circuit 27. Then, the number verification circuit 28 performs a verification operation between the number stored in the received number memory circuit 27 and the telephone number stored in the memory circuit 18. If the number stored in the received number memory circuit 27 and the number stored in the memory circuit 18 match, the output terminal 29 of the number matching circuit 28
An H level signal is outputted to the second paging signal generation circuit 30. As a result, the second ringing signal generation circuit 30 becomes operational, and a ringing signal different from the ringing tone from the first ringing signal generation circuit 3 is output. The calling signal output from the second calling signal generating circuit 30 is sent to an amplifier circuit 31.
After being amplified, the signal is applied to the third winding 32 of the transformer 5 . Therefore, a ringing signal is induced in the second winding 8 that constitutes the transformer 5 and to which the speaker 7 is connected as a load, and is emitted by the speaker 7 as a ringing tone. While such a ringing operation is being performed, the ringing signal from the second ringing signal generation circuit 30 amplified by the amplifier circuit 31 is transmitted to the telephone circuit 1.
1 to the calling party, the calling party can recognize that the calling operation is being performed after receiving the call. Further, when the number stored in the received number memory circuit 27 and the telephone number stored in the memory circuit 18 match as a result of the verification operation by the number verification circuit 28, the drive circuit 33 becomes operational and the matching operation is performed. For example, the number of the automatic dial operation button provided corresponding to the memory in which the telephone number is stored is displayed on the numeric display 34.
Display as 1〓. Therefore, the owner of the telephone can not only recognize that there is an incoming call by the ringing tone emitted from the speaker 7, but also be able to select the caller by the difference in the ringing tone. It is possible to recognize the caller, and furthermore, the number displayed by the numeric display 34 makes it possible to recognize who the caller is. After performing such recognition, the owner of the telephone
2 is removed from the telephone set, the number matching circuit 28, the second ringing signal generating circuit 30, and the driving circuit 33 become inactive, and a conversation with the caller is carried out. In this way, when the number sent by the caller and the telephone number stored in the memory circuit 18 match, a calling operation is performed by a calling signal output from the second calling signal generating circuit 30 and the number display 34
However, if there is no matching number, the H level signal is not output to the output terminal 29 of the number matching circuit 28, and the calling operation and display operation are performed. There isn't. Then, after a predetermined period of time has elapsed, the hook operation control signal output terminal 21 provided in the control circuit 19
A signal for disconnecting the telephone line is output, and the hook control circuit 10 performs the disconnection operation. In this way, when a call is received from a person whose phone number does not match the phone number stored in the memory circuit 18, no ring tone is emitted from the speaker 7, thereby eliminating prank calls and mistaken calls. I can do it.

In this embodiment, a case has been described in which three telephone numbers are stored for automatic dialing, but the number is not limited to three. and,
Of course, if the stored number is 2 digits, such as 16, the number display 34 will also display 2 digits. Furthermore, by operating a single button, the telephone number is checked against the telephone number stored in the memory circuit provided for dialing. In a telephone device that calls a telephone number stored in a memory circuit by carrying out this process, the telephone number stored in the memory circuit can be compared with the telephone number stored in the memory circuit, and in this case, the shortened The dialed number will be displayed on the numeric display 34. It is also possible to incorporate this into a telephone device that incorporates two automatic dialing functions: dialing by a single operation button and dialing by speed dialing. In this case, the number of dials by a single operation button can be increased to 9. If set, since two digits are always displayed in the case of speed dialing, it is possible to distinguish between the number for a single operation and the speed dial number. Furthermore, although the response message sending circuit 23 is configured to store the response message in the memory circuit, it can also be constructed using a tape recorder.

(G) Effects of the Invention The caller selection circuit of the present invention emits a ringing signal when the number corresponding to the DTMF signal transmitted from the caller after receiving a call matches the number stored in the memory circuit. This not only protects the phone owner from prank calls and mistaken calls, but also allows the caller selection PIN to be stored in a memory circuit for automatic dialing. This has the advantage that not only does the owner of the phone not have to tell a specific person his/her PIN number, but it also solves the problem of the caller forgetting their PIN number. are doing. Furthermore, the present invention provides a method for transmitting a DTMF signal sent from a calling party after receiving a call.
When the number corresponding to the signal matches the telephone number stored in the memory circuit for automatic dialing and the emitting operation of the ringing signal is started,
Since the number of the automatic dial operation button provided corresponding to the memory circuit in which the matching telephone number is stored is displayed on the numeric display, in other words, the number of the automatic dial operation button is displayed instead of the telephone number. Displaying the number has the advantage that the owner of the telephone can very easily recognize the caller before answering the telephone.

[Brief explanation of drawings]

The illustrated circuit is one embodiment of the caller selection circuit of the present invention. Explanation of main drawing numbers, 3...First ringing signal generation circuit, 4...Selection switch, 10...Hook control circuit, 11...Telephone circuit, 12...Handset, 1
3...Dial operation button, 14...Dial signal generation circuit, 18...Memory circuit, 19...Control circuit, 23...Response message sending circuit, 26...
DTMF signal receiving circuit, 27...Received number memory circuit, 28...Number verification circuit, 30...Second calling signal generation circuit, 33...Drive circuit, 34...Numeric display.

Claims (1)

[Claims] 1. By operating one of the plurality of automatic dial operation buttons provided, a dial signal is sent by calling up the telephone number stored in the memory circuit corresponding to the operation button. In the telephone device, the telephone device is equipped with an automatic dialing device that emits a ringing signal when a number corresponding to a DTMF signal transmitted from a calling party after an incoming call operation matches a PIN number, and a sound emitting device that emits a ringing signal. The sound emitting device uses the telephone number stored in the circuit as a password and when the number corresponding to the DTMF signal sent from the calling party after receiving the call matches the telephone number stored in the memory circuit. A calling signal is emitted from the telephone, and the number of an automatic dialing operation button provided corresponding to a memory circuit in which the telephone number is stored is displayed on a numeric display. Caller selection circuitry in telephone equipment.