JPS6376660A - Caller selection circuit for telephone set - Google Patents

Abstract

PURPOSE:To recognize a caller by displaying the number of an automatic dial operational button provided in response to a memory circuit when a number corresponding to a DTMF sig 1 transmitted from a caller coincides with a number stored in the memory circuit. CONSTITUTION:When a number collation circuit 28 decides that the number stored in a reception number memory circuit 27 coincides with the telephone number stored in the memory circuit 18, a drive circuit 33 becomes operable. The number of the automatic dial operation button is displayed on a numerical display 34. Said button is provided in response to the memory in which the telephone number coinciding with the number is stored. Thus a user can recognize a call with the aid of a call sound emitted from a speaker 7. Simultaneously he can recognize that said call is accompanied by a caller selection action due to the feature of the call sound. Besides to that, he can know who is a caller with the aid of the displayed number.

Description

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

(b) Conventional technology When a caller makes a call, a ring tone sounds in response to the ringing signal coming from the telephone line, and by hearing this ring tone, the caller recognizes that there is an incoming call. The telephone device is configured.

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. 1983-1981. There is one disclosed in Japanese Patent No. 11668. Furthermore, when making a call, manipulating the area code and the other party's number is not only inconvenient, but also involves the problem of entering the wrong number. Many telephone devices equipped with a device called an automatic dialing device, which allows calls to be made by simply operating a button, are in widespread use, and examples of such technology are disclosed in Japanese Patent Publication No. 53-30601, for example. There are some that have been disclosed.

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

(d) Means for Solving the Problems The caller selection circuit of the present invention detects whether the number corresponding to the DTMF signal transmitted from the caller after an incoming call operation 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) Function The present invention utilizes a telephone number stored in a memory circuit provided for performing an automatic dialing operation as a PIN number for selecting a caller, and uses the number displayed on a numeric display to This makes it possible to recognize who the caller is.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The illustrated circuit is one embodiment of the caller selection circuit of the present invention. In the figure, (1) is a connection terminal with a telephone line;
(2) is the first rectifier that rectifies the calling signal arriving from the telephone line.
A diode bridge circuit (3) is a first ringing signal generating circuit that outputs a ringing signal in response to the ringing signal rectified by the first diode bridge circuit (2), (4) is a selection switch for selecting whether to activate or deactivate the caller selection operation, and the illustrated state is the inactive state. East) is a transformer (7) to which a ringing signal from the first ringing signal generation circuit (3) is applied to the first winding (6) when the selection switch (4) is in the inoperative position;
) is a speaker that emits a calling signal, and is connected as a load to the second winding (8) of the transformer (giant). (9) is a second diode bridge circuit provided to determine the connection polarity with the telephone line; (10) is a hook control circuit that controls the closing operation of the telephone line; (11)
is a telephone circuit called the speech network,
Handset 2> is connected. (13) is a dial operation button 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); (15), (1
6) and (17) are respectively closed by operating the automatic dial operation button. The second and third operating switches, (18) are memory circuits that can store telephone numbers for automatic dialing, and (19) are memory circuits that store telephone numbers in memory circuits (18) corresponding to each of the operating switches. A control circuit for controlling operation and calling operation, (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), and the first calling signal generation circuit (20) is applied to the control terminal (20). The control circuit (19) is configured to start each operation when a signal from the circuit (3) is applied. 21) is a hook operation control signal output terminal which is provided in the control circuit (19) and outputs a signal to control the operation of the hook control circuit (10), and when the signal is supplied to the control terminal (20>), It is configured to output a signal that closes the telephone line when applied. (2
2) is a hook control circuit <1 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) to which a drive signal is output after the telephone line is closed by the operation of 0) becomes operational when the drive signal is output to the drive signal output terminal (22). This is a response message sending circuit, 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 a telephone number is stored in the memory circuit (18); 25) is the control circuit (1
It is an output terminal provided in the dial signal generating circuit (14) and outputs the telephone number called up from the memory circuit (18) during automatic dialing operation.
It is connected to the. (26) is a DTMF that receives a signal that can be sent as a PIN number from a caller, that is, a DTMF signal.
It is a signal receiving circuit and transmits the 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; (28) is a reception number memory circuit that operates after the telephone line is closed by the hook control circuit (10); state, the memory circuit (1
This is a number matching circuit that matches the telephone number stored in 8) with the number stored in the received number memory circuit (27), and outputs an H (high) level signal when the numbers match. The output terminal (29) is equipped with an output terminal (29).

In such a circuit, the memory circuit (18) stores a subscriber number, a city code, and an area code.The verification operation by the number verification circuit (28) is based on the subscriber number, that is, the last four digits. This is done by number. (30) is activated when an H level signal is output to the output terminal 29) of the number matching circuit (28), and the calling signal is output from the first calling signal generating circuit (3). a second ringing signal generation circuit that outputs a different ringing signal (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 (small) and the telephone. It is connected to the circuit (11) so that the voltage is not applied to the circuit (11).

(33) becomes operational when the DTMF signal sent from the caller matches the telephone number stored in the memory circuit (18) by the matching operation by the number matching circuit (28), and when the matching occurs. This is a drive circuit that displays on a numeric display (34) the number of an automatic dialing operation button provided corresponding to a memory circuit in which a telephone number is stored. If the telephone number stored in the memory circuit 18) does not match, the telephone line is disconnected by the action of the hook control r-circuit (10) after a predetermined period of time. It is configured. Further, when the calling signal output from the second calling signal generation circuit (30) is emitted by the speaker (7), that is, the calling operation is performed in accordance with the number matching operation by the number matching circuit (28). When the handset (12) is removed from the telephone while the telephone is in use, the second ring signal generation circuit (30) becomes inactive and the drive circuit (3
3) is configured to be inactive. As described above, the caller selection circuit of the present invention has been constructed, and the operation of the 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 performed with the first . This is done by operating the second and third operation switches (15), (16) and (17), respectively, and also 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. An example of such a response message is 1 Yes, ○○. Please send your phone number. ” I can remember it like this. As described above, the operation of storing telephone numbers and response messages in the memory circuit (18) is performed.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), remove the handset (12) from the telephone and press the dial operation button (1).
3). When the handset (12) is removed from the telephone, a hook switch (not shown) is switched, as is well known, to close the telephone line. In such a state, the dial operation button (13)
When you operate the button, a dial signal corresponding to that operation button is output from the dial signal generation circuit (14).
1) to the telephone line. The operation when making a call by operating the dial operation button (13) is performed in this way.Next, the case where a call is made by automatic dialing operation will be explained. Such an operation can be performed with the handset (12) removed from the telephone by pressing the operation switches (15) and (16) provided corresponding to the memory in which the telephone number of the person to be called is stored.
, (17) are closed by operating the automatic dial operation button. For example, when the first operation switch (15) is suppressed and opened, the memory circuit (1
Among the phone numbers stored in 8), the phone number stored in the memory corresponding to the first operation switch (15) is called and applied to the dial signal generation circuit (14) through the control circuit (19). Deceive. As a result, the dial signal corresponding to that number is generated by the dial signal generating circuit (1
4) and can be sent to the telephone line through the telephone circuit (11). With such an operation, the owner of the telephone can call the person whose telephone number is stored in the memory circuit (18) by means of an automatic dialing operation.

As mentioned above, the operation when making a phone call is performed, but
Next, the operation when a caller receives a call will be explained. First, we will explain the case where the selection switch (4) for selecting whether to operate or disable the caller selection operation is in the non-operating position as shown, that is, when it operates as a normal telephone device. When a calling signal arrives from the line, 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. An electronic calling signal is output to the output terminal.The calling signal output from the first calling signal generating circuit (3) is passed through a selection switch (4) to form a transformer (5). The voltage is applied to the first winding (6).As a result, it constitutes the transformer (7) and the speaker (7).
) is connected to the second winding <8) as a load, and a ringing signal is induced in the second winding <8), which is emitted as a ringing tone from the speaker (7). Therefore, the owner of the telephone becomes aware of the incoming call, and by removing the handset (12) from the telephone, the telephone line is closed and the caller is contacted. I can do it.

As described above, operations are carried out when operating as a normal telephone device. When the selection switch (4) is in the operating position, when a calling signal arrives from the telephone line, the first calling signal generating circuit (3) is activated as described above.
A calling signal is output. In such a state, the signal path to the first winding (6) constituting the transformer is cut off by switching the selection switch (4), so a ringing tone is emitted from the speaker (7). The calling signal output from the first calling signal generating circuit (3) is applied to the control terminal (20) provided in the control circuit (19) through the selection switch (4), and the calling signal is applied to the control terminal (20) provided in the control circuit (19).
9) is started. The control circuit (19
) When a call signal is applied to the control terminal (20) of the control circuit (19), a signal for performing a closing operation is output to the hook operation control signal output terminal (21) provided in the control circuit (19), and the hook control The circuit (10) performs a telephone line closing operation. After such a closing operation is performed, the control circuit (
A drive signal is outputted to the drive signal output terminal (22) provided at the terminal 19) and applied to the response message transmission path (23). If the drive signal is not applied to the response message output path (23), the response message output 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 the telephone circuit ( 11) to the calling party. 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. The DTMF signal sent from the calling party passes through the second diode bridge circuit (9), the hook control circuit (10) and the telephone circuit (11) to the DTMF signal receiving circuit (26).
> is applied.

When a 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 sends it to the control circuit (26). 19).

The signal input to the control circuit (19) is applied to the received number memory circuit (27) through the control circuit (19) and is stored in the received number memory circuit (27).

Then, the number matching circuit (28) performs a matching 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) matches the number stored in the memory circuit (18), an H level signal is sent to the output terminal (29) of the number matching circuit (28>). A signal is output, and the signal is
The signal can be applied to the calling signal generation circuit (3o). 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 second calling signal generation circuit (3
After the calling signal output from o) is input to the amplifier circuit (31) and amplified, it is passed through the third winding (
32). Therefore, a calling signal is induced in the second winding (8>) which constitutes the transformer mark) and to which the speaker (7) is connected as a load, and the speaker (
7) is emitted as a ring tone. When such a calling operation is being performed, the calling signal from the second calling signal generating circuit (30) amplified by the amplifier circuit (31) is sent to the caller through the telephone circuit (11). , the caller can recognize that the calling operation is being performed after receiving the call.In addition, the number stored in the received number memory circuit (27) and the memory can be recognized by the verification operation by the number verification circuit (28). When the phone number stored in the circuit (18) matches, the drive circuit (33)
〉 is activated and the number of the automatic dial operation button provided corresponding to the memory in which the matching telephone number is stored is displayed as ``1'' on the numeric display 34〉. Therefore, the owner of the telephone can not only recognize that there is an incoming call by the ring tone emitted from the speaker (7), but also recognize the difference in the ring tone when selecting a caller. It is possible to recognize that the call is a false call, and furthermore, it is possible to recognize who the caller is by the number displayed by the numeric display (34).After such recognition, the owner of the telephone is the handset (
12) from the telephone, the number matching circuit (28>, the second
The calling signal generating circuit (30) and the driving circuit (33) become inactive, and a conversation with the caller begins. In this way, when the number sent by the caller matches the telephone number stored in the memory circuit (18), the second ring signal generation circuit (30) outputs a ringing operation and a numeric display. (34) is performed, but if there is no matching number, an H level signal is not output to the output terminal (29>) of the number verification circuit (28), and the calling operation and No display operation is performed.Then, after a predetermined period of time has elapsed, a signal to release the connection of the telephone line is output to the hook operation control signal output terminal (21) provided in the control circuit (19), and the hook control is performed. A disconnection operation is performed by the circuit (10).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), the speaker (7) Since no ringtone is emitted, 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. For example, the number of memories is 1
Of course, in the case of two digits such as 6, the number display <34) will also display two digits. In addition, 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 is designed to call a telephone number stored in a memory circuit by performing a special operation, it is also possible to perform verification with the telephone number stored in the memory circuit. The speed dial number will be displayed on the numeric display 34). It is also possible to incorporate two automatic dialing functions, one with a single operation button and the other with speed dialing, into a telephone device piece, in which case the number of dials using a single operation button can be up to 9. If set to , two digits are always displayed in the case of speed dialing, so it is possible to distinguish between the number for a single operation and the speed dial number. Also, a response message sending circuit (23)
Although the response message is stored in the memory circuit, it is also possible to use 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 system in which, when a number corresponding to a DTMF signal transmitted from a calling party and a telephone number stored in the memory circuit match, a telephone number corresponding to the telephone number stored in the memory circuit is provided. Since the number of the automatic dialing operation button is displayed on the numeric display, the telephone owner has the advantage of being able to recognize the caller before answering the call. .

[Brief explanation of the drawing]

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, (1
1)...Telephone circuit, (12)...Handset,
(13)...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> ... Number display.

Claims (1)

[Claims] (1) By operating one of the multiple automatic dialing operation buttons, a dial signal is sent by calling up the telephone number stored in the memory circuit corresponding to the operation button. The system is equipped with an automatic dialing device that allows for automatic dialing, and the DTM sent by the caller after receiving a call.
In a telephone device equipped with a device that emits a ringing signal when a number corresponding to an F signal and a password match, a number corresponding to a DTMF signal transmitted from a calling party and a PIN code are stored in the memory circuit. When the telephone number matches, a calling signal is emitted and the number of the automatic dialing operation button provided corresponding to the memory circuit in which the telephone number is stored is displayed on a numeric display. A caller selection circuit for a telephone device, characterized in that: