JPS6376659A - Calling selection circuit for telephone set - Google Patents

Abstract

PURPOSE:To make it unnecessary to let a specific party know an identification number and to solve such trouble that a caller forgets his identification number by exploiting a telephone number stored in a memory circuit as an identification number and transmitting a call signal to the caller through a telephone line when two numbers agree with each other. CONSTITUTION:If a user makes a call to a person whose telephone number is not stored in the memory circuit 18, a dial signal corresponding to a dial operation button 13 is outputted from a dial signal generator circuit 14 and transmitted to the telephone line through a telephone set circuit 11. If he calls through an automatic dial operation, he operates operational switches 15-17 provided corresponding to the memory in which the telephone number of his other party is stored. If the 1st operational switch 15 is depressed and closed, for instance the telephone number corresponding to the 1st operational switch 15 is called among telephone numbers stored in the memory circuit 18, and impressed on the dial signal generator circuit 14. the dial signal corresponding to the number is outputted from the dial signal generator circuit 14, and transmitted to the telephone line through the telephone set circuit 11.

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 ringing sound is produced in response to a ringing signal coming from the telephone line, and by hearing this ringing sound, the caller recognizes that there is an incoming call. I can do it. In such a configuration, the owner of the telephone is left with the possibility of not only making a prank call but also making a false call, which is extremely unpleasant. As a way to solve this problem, a telephone device has been developed that rings only when a person who knows the PIN number makes a call; examples of such technology include Japanese Patent Laid-Open No. 55-11668. There is something disclosed in the publication No. In addition, when making a call, manipulating the area code and the number of the other party is not only inconvenient, but also involves the problem of entering the wrong number. Telephone devices equipped with a device called an automatic dialing device that allows calls to be dialed by operation are widely used, and examples of such technology include the
There is one disclosed in Publication No. 3-30601.

(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 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 calling signal is sent to the caller via a telephone line.

(E) Function The present invention utilizes a telephone number stored in a memory circuit provided for automatic dialing as a PIN number for selecting a caller, and also sends a ring tone to the caller. This is how it was done.

(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 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. a transformer (7) to which a ringing signal from the first ringing signal generating 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 (mutual). (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,
A handset (12) 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), (
16) and (17) are the first numbers operated during automatic dialing, respectively. 2nd and 3rd operating switches; (18) is a memory circuit that can store telephone numbers for automatic dialing; (19) is a memory circuit that stores telephone numbers in correspondence with each of the operating switches; A control circuit (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 calling signal generation circuit (3) is applied to the control terminal (20), the control circuit (19)
) is configured to perform each operation. (
21) is a hook operation control signal output terminal that 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 applied to the control terminal (20), It is configured to output a signal to close the telephone line when the telephone line is connected. (22) is a drive signal that 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 response message sending circuit that becomes active when a drive signal is output to the drive signal output terminal (22), and sends a message to the caller prompting him to send his PIN number. (24) is provided in the control circuit (19) and corresponds to the number of the dial operation button 3> when the telephone number is stored in the memory circuit (18). An input terminal (25) to which a signal is input is provided in the control circuit (19) and is also provided in the memory circuit (1) during automatic dialing operation.
8) is an output terminal from which the called telephone number is output, and 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 outputs a coded signal to the control circuit (19) and also outputs the coded signal to the control circuit (19). The signal is configured to be stored by an incorporated reception number memory circuit (not shown). (27) is activated after the hook control circuit (10) performs the closing operation, and the telephone number stored in the memory circuit (18>) and the number stored in the received number memory circuit This is a number matching circuit that performs matching with the numbers, and an output terminal that outputs an H (high) level signal when the numbers match.
28). In such a circuit, the memory circuit (18) stores the subscriber number, the city code, and the area code, but the verification operation by the number verification circuit (27) is based on, for example, the subscriber number, that is, the last four digits. It is carried out by (29) is the output terminal (
a second ringing signal generation circuit which enters an operating state when an H level signal is output to 28> and outputs a signal different from the signal outputted from the first ringing signal generation circuit (3);
(30) is an amplifier circuit that amplifies the calling signal output from the second calling signal generating circuit (29), and the output signal is applied to the third winding (31) constituting the transformer (5). and is connected so as to be applied to the telephone circuit (11). In such a circuit configuration, if the number successfully transmitted by the caller and the number stored in the memory circuit (18) do not match, the hook control circuit (10) is allowed to recover after a predetermined time and the telephone line is switched off. Configured to release closure. Furthermore, if the handset (12) is lifted while the speaker (7) is emitting a ringing signal output Δ from the second ringing signal generating circuit (29), the second ringing signal generating circuit (29) malfunctions. configured to be in operation.

The caller 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 memory operation is performed by switching the first . Operate the second and third operation switches (15), (16), and (17), respectively, and press the dial operation button (
13). 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. And, as such a response message,
For example, it is stored as "Yes, this is ○O. Please send your phone number."

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. Memory circuit (1
When making a call to a person whose phone number is not stored in 8), the call is made by removing the handset (12) from the telephone and operating the dial operation button (13).

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 this state, when a dial operation button (13) is operated, a dial signal corresponding to the operation button is output from the dial signal generation circuit (14) and sent to the telephone line through the telephone circuit (11). The operation when making a call using the dial operation button (13) is performed as described above, but next, the case where a call is made by automatic dialing operation will be explained. Such an operation is
an operation switch (15) provided corresponding to a memory in which the telephone number of the person to be called is stored when the handset (12) is removed from the telephone;
This is done by operating (16) and (t7). For example, when the first operating switch (15) is suppressed and opened, 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. The signal is applied to the dial signal generation circuit (14).As a result, a dial signal for that number is outputted from the dial signal generation circuit (14) and sent to the telephone line through the telephone circuit (11).Such an operation is performed. You can make phone calls.

As mentioned above, the operation when making a phone call is performed, but
Next, the operation when a call is received from a caller will be explained. First, a case will be described in which the selection switch (4) for selecting whether to activate or deactivate the caller selection operation is in the inoperative position shown, that is, when the telephone device 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 output to its output terminal. The calling signal output from the first calling signal generating circuit (3) is applied to the first winding (6) constituting the transformer (large) through the selection switch (4). ) and speakers (
A ringing signal is induced in the second winding (8) to which 7) is connected as a load, and the ringing signal is emitted from the speaker (7) as a ringing tone. Therefore, the owner of the telephone will be aware of the incoming call, and by removing the handset (12) from the telephone, a closing operation will be performed and the caller will be able to talk to the caller.

As described above, the operation when operating as a normal telephone device is performed, but next, the operation when the selection switch <4) is in the operating position opposite to the state shown in the figure, that is, the position where the caller selection operation is performed. I will explain about it. When a calling signal arrives from the telephone line when the selection switch (4) is in the operating state, the first calling signal generating circuit (3)
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). There isn't. 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 calling 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) closes the telephone line. After this closing operation, the control circuit (10)
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). When a drive signal is applied to the response message sending circuit (23), 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 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 to

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) can be entered.

The coded signal input to the control circuit (19) is stored by a received number memory circuit incorporated within the control circuit (19). Then, the number verification circuit (27) performs a verification operation between the number stored in the received number memory circuit and the telephone number fully stored in the memory circuit (18). If the number stored in the received number memory circuit matches the number stored in the memory circuit (18), the number verification circuit (27)
An H-level signal is fully output to the output terminal (28) of the circuit, and this signal is fully applied to the second calling signal generating circuit (29). As a result, the second ringing signal generation circuit (29) 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 (29) is sent to the amplifier circuit (30).
) and after being amplified, it is applied to the third winding (31) constituting the transformer (). Therefore, a ringing signal is induced in the second winding (8) which constitutes the transformer (giant) and to which the speaker (7) is connected as a load, and is emitted as a ringing tone by the speaker (7). Then, when such a calling operation is being performed, the amplifier circuit (
30) amplified by the second calling signal generation circuit (29).
) is sent to the calling party through the telephone circuit (11), so that the calling party can recognize that a calling operation is being performed. The owner of the telephone can not only recognize that there is a call by the ring tone emitted from the speaker (7), but also recognize the difference in the ring tone when the caller is selected. It is possible to recognize that After performing such recognition, when the telephone owner removes the handset (12) from the telephone, the number verification circuit (27) and the second ring signal generation circuit (29) become inoperable and the communication with the caller is interrupted. A call will be made.If the number sent by the caller matches the telephone number stored in the memory circuit (18), a call signal will be output from the second call signal generation circuit (29). However, if there is no matching number, the output terminal (28) of the number matching circuit (27) is called.
) is not outputted, and the second paging signal generating circuit (29) is not activated. Then, after a predetermined period of time has elapsed, a signal for unclosing 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)
) is performed. In this way, if 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) will not emit a ringing tone, so it may be a prank call or a wrong call. can be excluded.

In the Naoki 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, 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 which calls up a telephone number stored in a memory circuit by carrying out this process, it is also possible to perform verification with the telephone number stored in the memory circuit. Although the response message is stored in the memory circuit as the response message/message sending circuit (23), 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 feature not only protects the phone owner from prank calls or 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 emits the ringing signal = 16- when the number that can be transmitted by the caller after the incoming call operation matches the telephone number that has been stored in the memory circuit and the operation of emitting the ringing signal is started. Since the information is sent to the caller, the caller can recognize that the calling operation is being performed, and the present invention has the effect of not giving the caller a sense of anxiety.

[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, (5)...Transformer, (7)...Speaker, keO)... Hook control circuit, (11)・
...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, (2
7)...Number verification circuit, (29)...Second calling signal generation circuit.

Claims (1)

[Claims] (1) Equipped with an automatic dialing device that sends a dialing signal by calling a telephone number stored in a memory circuit, and a D that is 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 a TMF signal and a password match,
A telephone device for making a call, characterized in that the telephone number stored in the memory circuit is used as a password and a calling signal is sent to the caller via a telephone line in response to number matching. user selection circuit.