JPH0439944B2 - - 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) Prior art When a caller makes a phone call, a ringing signal sounds in response to the ringing signal that comes from the telephone line, and by hearing this ringing tone, the owner of the telephone can tell when the phone is calling. It is possible to recognize that something is happening. 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, telephone devices have been developed that ring only when a person who knows the PIN number calls.
There is one disclosed in Publication No. 55-11668. Also,
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. Many telephone devices equipped with a device called an automatic dialing device that allows a call to be made by operation are in widespread use, and examples of such technology include the one disclosed in Japanese Patent Publication No. 53-30601. There is.

(c) Problems to be solved by the invention According to the technique of selecting a caller using the above-mentioned PIN code, it is possible to eliminate calls caused by prank calls or mistaken calls, but if the PIN code is not connected to the phone. Since it is set by the owner, the PIN number needs to be communicated to a particular caller, and there is a problem in that the caller forgets the PIN number.
Further, in such a device, since no response signal is sent to the caller after the caller transmits the personal identification number, there is a problem that the caller feels uneasy. The present invention seeks to provide a caller selection circuit that is improved in this respect.

(d) Means for Solving the Problems The calling party selection circuit of the present invention emits a ringing signal when the number corresponding to the DTMF signal sent from the calling party matches the password after receiving the call. and a response message associated with the match is sent to the calling party, and after the sending of the response message is completed, the calling signal is sent to the calling party.

(E) Effect The present invention provides for the transmission of information sent by the calling party after receiving the call.
When the number corresponding to the DTMF signal matches the password, a response message is sent to the caller, and after the message is sent, a calling signal is sent to the caller.

(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 whether to activate or deactivate the caller selection operation. is inactive. 5 is a transformer to which the 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;
A speaker 7 emits a calling signal, and is connected as a load to the second winding 8 of the transformer 5 . 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 constituting the dial operation button 13; 15, 16, and 17 each operate an automatic dial operation button. 18 is a memory circuit in which a telephone number for performing an automatic dialing operation is stored; 19 is a memory circuit 18 corresponding to each of the above-mentioned operating switches; 20 is a control terminal to which a signal output from the first calling signal generation circuit 3 is applied when the selection switch 4 is in the selection operation 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. A hook operation control signal output terminal 21 is provided in the control circuit 19 and outputs a signal for controlling 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 that connects the Reference numeral 22 denotes a first circuit to which a drive signal is output after the telephone line is closed by the operation of the hook control circuit 10 based on the signal output from the hook operation control signal output terminal 21 of the control circuit 19.
The drive signal output terminal 23 is a first response message sending circuit that becomes operational when a drive signal is output to the first drive signal output terminal 22, and sends a message to the caller prompting him to send his PIN number. It has a sending action. 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; 25 is provided in the control circuit 19; It is also an output terminal to which a telephone number called from the memory circuit 18 is output during automatic dialing operation, and is connected to the dial signal generating circuit 14. 26 is a signal sent by the caller as a PIN number, ie DTMF
This is a DTMF signal receiving circuit that receives signals, and is connected to output a coded signal to the control circuit 19. 27 is a reception number memory circuit in which the number received by the DTMF signal reception circuit 26 is stored; and 28 is activated after the hook control circuit 10 closes the telephone line, and the memory This is a number matching circuit that matches the telephone number stored in the circuit 18 with the number stored in the received number memory circuit 27, and when the numbers match, H (high).
It is provided with a first output terminal 29 that outputs a high level signal and a second output terminal 30 that outputs an H level signal when the numbers do not match. In such a circuit, the memory circuit 18 stores a subscriber number;
Although the local area code and the area code are stored, the verification operation by the number verification circuit 28 is performed using, for example, the subscriber number, that is, the last four digits. 31
is H to the first output terminal 29 of the number matching circuit 28.
A second drive signal output terminal 32 outputs a drive signal when a level signal is output, and 32 is a second response message sending circuit that becomes operational when a drive signal is output to the second drive signal output terminal 31. , has the function of sending a message to the calling party that the PIN number has been matched.
33 is the second output terminal 30 of the number verification circuit 28
A third drive signal output terminal 34 outputs a drive signal when an H level signal is output to the third drive signal output terminal 33, and a third response message sending circuit 34 becomes operational when a drive signal is output to the third drive signal output terminal 33. It has the function of sending a message to the calling party that the PIN number has not been matched. 35 becomes active when an H level signal is output to the first output terminal 29 of the number matching circuit 28, and outputs a calling signal different from the calling signal output from the first calling signal generating circuit 3. A second ringing signal generation circuit 36 is an amplifier circuit that amplifies the ringing signal outputted by the second ringing signal generation circuit 35, and its output signal is applied to the third winding 37 constituting the transformer 5. are connected like this. 38 is a switch circuit connected to guide the calling signal from the second calling signal generation circuit 35 amplified by the amplifier circuit 36 to the telephone circuit 11; said control circuit 1 in order to guide the calling signal to the telephone circuit 11 after the
9. In such a circuit configuration, the second calling signal generation circuit 3
When the handset 12 is disconnected from the telephone when a calling operation is being performed based on the calling signal outputted from the device 5, that is, when the calling operation is being performed due to the matching operation of the numbers by the number matching circuit 28, a second calling signal is generated when the handset 12 is disconnected from the telephone. The generating circuit 35 is rendered inactive. Further, if the number sent by the caller and the telephone number stored in the memory circuit 18 do not match, the third response message sending circuit 34
After the message is sent from the hook control circuit 1
0, the telephone line is disconnected. And the hook control circuit 10
For example, after the incoming call operation by the second ringing signal generation circuit 3
When the caller hangs up while the calling operation is in progress, the control circuit 19 detects signal changes on the telephone line (not shown), and the telephone line is disconnected and disconnected. The configuration is such that each circuit is restored. As described above, the caller selection circuit of the present invention is configured,
Next, the operation of such a circuit will be explained.

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 operated 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. The first, second, and third response message sending circuits 23, 32, and 34 have built-in message memory circuits in which response messages are stored. is memorized. The response message stored in the first response message sending circuit 23 includes, for example, "Yes,
It's ○○. Please send your phone number. ”
The response message stored in the second response message sending circuit 32 is, for example, "Please wait for a while as the call is in progress." The response message stored in the sending circuit 34 is, for example, ``I cannot answer the phone right now, so please call me later.''

As described above, the operation of storing the telephone number and each response message in the memory circuit 18 is carried out, but the operation as a telephone device will now 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 handset 1
2 from the telephone and then operating the dial operation button 13. Said handset 1
2 is removed from the telephone set, 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 carried out by removing the handset 12 from the telephone and pressing the automatic dialing operation switch 15, 16, 17 provided corresponding to the memory in which the telephone number of the person to be called is stored. This is done by closing it using the operation. For example, when the first operating switch 15 is pressed and closed, the telephone number stored in the memory corresponding to the first operating switch 15 among the telephone numbers stored in the memory circuit 18 is called up, and the control circuit 19 The signal is applied to the dial signal generating circuit 14 through. 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. With such operations in place, 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 the closing operation is performed, a drive signal is outputted to the first drive signal output terminal 22 provided in the control circuit 19 and applied to the first response message sending circuit 23. When a drive signal is applied to the first response message sending circuit 23, the first
The response message sending circuit 23 becomes operational,
The message stored in the message memory circuit, that is, the message "Yes, this is ○○. Please send your phone number" is output, and is sent to the caller through the telephone circuit 11. be done. When a caller who has heard such a message operates a dial button corresponding to a telephone number, a signal corresponding to each button, that is, a DTMF signal, is sent to the telephone line. Sent by caller
The DTMF signal is sent to the second diode bridge circuit 9,
Through the hook control circuit 10 and the telephone circuit 11
The signal is applied to the DTMF signal receiving circuit 26. Applicable
When the DTMF signal sent from the calling party is applied to the DTMF signal receiving circuit 26, the DTMF signal receiving circuit 26 outputs a coded signal corresponding to the number and inputs it to the control circuit 19. The signal input to the control circuit 19 is
9 to the received number memory circuit 27, and is stored in the received 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. When the number stored in the received number memory circuit 27 matches the number stored in the memory circuit 18, an H level signal is sent to the first output terminal 29 where the number matching circuit 28 is provided. The signal is outputted and applied to the second calling signal generation circuit 35 and the control circuit 19. As a result, the second ringing signal generating circuit 35 becomes operational, and a ringing signal different from the ringing tone from the first ringing signal generating circuit 3 is outputted, and the second driving signal provided in the control circuit 19 is activated. A drive signal is output to the signal output terminal 31 and applied to the second response message sending circuit 32 . The calling signal output from the second calling signal generating circuit 35 is input to an amplifier circuit 36 where it is amplified and then passed through the third winding 37 constituting the transformer 5 .
is applied to Therefore, a ringing signal is induced in the second winding 8 forming the transformer 5 and connected to the speaker 7 as a load, and is emitted by the speaker 7 as a ringing tone. On the other hand, when a drive signal is applied to the second response message sending circuit 32, the second response message sending circuit 32 enters the operating state, and the message stored in the message memory circuit, ie, "Calling is in progress." Please wait for a while.'' A message corresponding to the match of the password is output and sent to the caller through the telephone circuit 11. While the message is being transmitted, the speaker 7 is emitting a calling signal, but the switch circuit 38
Therefore, the operation of outputting the calling signal to the telephone circuit 11 is blocked. Therefore, only the message from the second response message sending circuit 32 is sent to the calling party, and the calling party can clearly hear the message. When the message sending operation from the second response message sending circuit 32 is completed, the blocking operation by the switch circuit 38 is released, and the calling signal amplified by the amplifier circuit 36 is sent to the caller through the telephone circuit 11. become a state. Therefore, the calling party can recognize that a ringing operation is being performed after receiving a call by listening to the ringing tone that is sent. In addition, the owner of the telephone can recognize that there is an incoming call by the ringing tone emitted from the speaker 7, and the difference in the ringing tone allows the owner to select the caller. You can recognize that it is a call. After performing such recognition, when the telephone owner removes the handset 12 from the telephone, the number verification circuit 28 and the second ring signal generation circuit 3 are activated.
5 becomes inactive and a conversation with the caller is made. In this way, when the number sent by the caller and the telephone number stored in the memory circuit 18 match, the first
An H level signal is output to the output terminal 29 and the above-described operation is performed, but if there is no matching number, the first output terminal 29 of the number matching circuit 28 is output.
Since no H level signal is output to the second paging signal generating circuit 35, the paging operation by the second paging signal generation circuit 35 is not performed. If there is no matching number, an H level signal is output to the second output terminal 30 provided in the number matching circuit 28 and input to the control circuit 19. As a result, a drive signal is outputted to the third drive signal output terminal 33 provided in the control circuit 19 and applied to the third response message sending circuit 34. When a drive signal is applied to the third response message sending circuit 34, the third response message sending circuit 34 becomes operational, and the message stored in the message memory circuit, ie, ``I am unable to answer the phone at this time.'' Please call later.'' A message corresponding to the failure of the password is output and sent to the caller through the telephone circuit 11. After the message sending operation is performed, a signal for releasing the telephone line is output to the hook operation control signal output terminal 21 provided in the control circuit 19, and the hook control circuit 10 performs the disconnection operation. It is done. In this way, the memory circuit 18
If a call is received from a person whose phone number does not match the phone number stored in the phone, the ring tone will not be emitted from the speaker 7, so that prank calls and mistaken calls can be eliminated.

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. In addition, although the telephone number is compared with the telephone number stored in the memory circuit provided for dialing by operating a single button, speed dialing, that is, special operation of dial operation button 13, In a telephone device that calls a telephone number stored in a memory circuit by performing the above operations, it is also possible to perform verification with the telephone number stored in the memory circuit. Further, although the first, second and third response message sending circuits 23, 32 and 34 are configured to store response messages in memory circuits, they may 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. By using the registered phone number, the owner of the phone not only does not have to tell a specific person the PIN number, but also solves the problem of the caller forgetting the PIN number. It has advantages. Then, in the present invention, after the incoming call operation, the calling party sends the
When the number corresponding to the DTMF signal matches the PIN number, a response message is not only sent to the caller, but also a ringing signal is sent to the caller after the response message is sent, so that it is possible to make a call. This has the advantage that the caller does not feel uneasy because the caller hears the ringing tone until the caller answers the phone. Furthermore, when the number corresponding to the DTMF signal sent by the calling party and the password match, the operation of emitting a ringing signal and the operation of sending a response message to the calling party in parallel with the matching. In other words, even when the response message is being sent to the caller, the ringing signal is emitted, so the ringing operation after receiving the call can be carried out efficiently. The present invention has the advantage of being able to.

[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...First response message sending circuit, 26
...DTMF signal receiving circuit, 27...Received number memory circuit, 28...Number verification circuit, 32...Second response message sending circuit, 34...Third response message sending circuit, 35...Second calling signal generation Circuit, 38...Switch circuit.

Claims (1)

[Claims] 1 Equipped with an automatic dialing device that sends out a dialing signal by calling the telephone number stored in the memory circuit, and the number corresponding to the DTMF signal sent by the caller after receiving the call matches the PIN number. In a telephone device equipped with a device that emits a ringing signal when When the numbers match, the operation of emitting a ringing signal and the operation of sending a response message to the calling party in accordance with the matching are carried out in parallel, and after the sending of the response message is completed, the calling signal is sent to the calling party. A caller selection circuit for a telephone device, characterized in that: