JPS63301655A - Caller selecting circuit for telephone system - Google Patents

Abstract

PURPOSE:To eliminate going near a telephone system for the recognization of a caller by informing an incoming from the caller only when an answering message is transmitted in correspondence to a responding message. CONSTITUTION:A responding message sending means 22 to execut the sending action of the responding message through a telephone line to a caller by detecting a ringer signal transmitted from the caller, a sound signal detecting circuit 24 to detect the presence or absence of an answering message transmitted from the caller in correspondence to the responding message and a ringing generating circuit 27 to execute the generating action of the ringing by detecting the presence of the answering message with the sound signal detecting circuit 24 are equipped. Thus, since a telephone system executes the selecting action of the caller without going near the telephone system in each time the call signal from the caller is transmitted, operations are widely reduced and completed without receiving troubles due to a silent call.

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 ringer arrives from the telephone line.
A ringing tone sounds in response to the signal, and by hearing this ringing tone, it is possible to recognize that there is an incoming call. With such a configuration, the owner of the telephone would be called not only in the case of a prank call but also in the case of a mistaken call, which was very unpleasant. As a way to solve this problem, telephone devices have been developed that are configured to ring only when a person who knows the PIN number makes a call.
An example of such a technique is the one disclosed in Japanese Patent Application Laid-Open No. 11668/1983, but in this technique, the PIN number is set by the owner of the telephone, so the PIN number must be known to the caller. This is not only necessary, but also creates the problem that the caller forgets the PIN number. Therefore, recently, after receiving a call from a caller, a response message is sent to the caller, and the voice of the caller who replies to the response message is listened to to determine who the caller is. A new type of telephone has been introduced in which the owner of the telephone recognizes whether the caller is calling and selects whether or not to answer the caller through the handset.

(c) Problems to be solved by the invention As mentioned above, with the technology in which the owner of the telephone device checks each voice transmitted by the caller, for example, the number of prank calls is the highest. Even in the case of a silent call, a call in which the caller's voice is not transmitted even when the call is activated, the owner of the telephone device should keep the telephone near the telephone device in order to recognize the caller. It was difficult for owners of telephone equipment because they had to go.

The present invention attempts to provide a caller selection circuit that solves this problem.

(d) Means for Solving Problems The caller selection circuit of the present invention detects a ringer signal transmitted from a caller and sends a response message to the caller via a telephone line. a response message sending means for performing a sending operation; a voice signal detection circuit for detecting the presence or absence of a response message transmitted by the caller in response to the response message; and the voice signal detection circuit detecting the presence of the response message. The circuit includes a calling signal generating circuit which generates a calling signal by doing this.

(E) Function The present invention transmits a response message to the calling party by receiving a ringer signal from the calling party, and after sending the response message, receives a reply message from the calling party. This system is designed to emit a sound to indicate that the caller has received a call.

(F) Embodiment An embodiment of the caller selection circuit of the present invention will be described with reference to FIGS. 1 and 2. In Fig. 1, (1) is a connection terminal with a telephone line, (2) is a first diode bridge circuit that rectifies the ringer signal coming from the telephone line, and (3) is a connection terminal of the first diode bridge circuit (2). A first ringing signal generation circuit outputs a first ringing signal in response to the rectified ringer signal, and (4) is a selection switch that selects whether to activate or deactivate the caller selection operation, and the illustrated state is (Base) is a state in which the first calling signal from the first calling signal generating circuit (3) is applied to the first winding (6) when the selection switch (4) is in the inactive position. transformer, (
7) is connected to the second winding (8) of the transformer (5),
An amplifier circuit (9) is an amplifier circuit (9) for amplifying the calling signal and voice signal induced in the second winding (8).
) receives the output from a speaker that emits sound, (10) is a second diode bridge circuit provided to determine the polarity of connection with the telephone line, and (11) is a hook that controls opening and closing of the telephone line. The control circuit (12) is a telephone circuit equipped with a communication circuit called a speech network (not shown) and a dial signal generation circuit (not shown) that generates a dial signal. A dial operation button (14) is connected. (15) is a control circuit in which the selection switch (4) is switched to the operating position, and the control terminal (16>) is connected to the first calling signal generation circuit (3).
) is applied to control various circuits to be described later for calling party selection.

(17) is a hook operation control signal output terminal that is provided in the control circuit (15) and outputs a signal to control the operation of the hook control circuit (11), and a signal is output to the control terminal (16). It is configured to output a signal that closes the telephone line when applied.

(18) is a closing signal that is output after the telephone line is closed by the operation of the hook control circuit (11) based on the signal output from the hook operation control signal output terminal (17) of the control circuit (15). The switch terminal (19) is closed when a closing signal is output to the switch terminal (18), and the sound applied to the telephone circuit (12) is transferred to the third winding (20) of the transformer (U). (21) is a first drive signal output terminal that outputs the first drive signal immediately after the closing signal is output from the switch terminal (18); (22) is the first drive signal output terminal; Signal output terminal (21
) becomes an operating state when the first drive signal is output to the
A first response message sending path (23) for transmitting a message prompting the caller to say something about the caller, such as the caller's name, as a response message is output from the first drive signal output terminal (21). The operation signal output terminal (24) receives the first drive signal from the operation signal output terminal (23) and outputs the operation signal after the first response message sending circuit (22) sends the first response message. ) becomes an operating state when an operating signal is output to the voice signal detection circuit that responds to the first response message and detects whether a response message has been sent from the caller. A first terminal (24a) for outputting a signal and a second terminal (24b) for outputting an output signal by detecting the reply message for about 3 seconds or more are provided. (25
) performs a time counting operation based on the output signal output from the first terminal (24a) when the audio signal detection circuit (24) becomes operational, and when a preset time elapses, the control circuit The first timer circuit (15) outputs a signal to the first timer circuit (25), which causes the control circuit (15) to stop outputting the operation signal output from the operation signal output terminal (23). The audio signal detection circuit (24) is rendered inactive. On the other hand, the first timer circuit (25) outputs a signal and enters a reset state. (26) is caused by applying the output signal from the second terminal (24b) of the audio signal detection circuit (24) to the control circuit (15).
15) is an operating terminal that outputs an output signal, and (27) is a first ringing signal that becomes active upon receiving an output signal from the operating terminal (26) and is outputted from the first ringing signal generation circuit (3). is a second calling signal generation circuit that outputs a different second calling signal, and the second calling signal generation circuit (27)
The second ringing signal, which is the output of the transformer, is applied to the third winding (20) of the transformer so that it is induced in the second winding (8). (28) is the second calling signal generation circuit (27).
) At the same time, the control circuit (15) is activated by an output signal outputted from the operation terminal (26), and while the output signal is applied, time is counted, and control is performed by counting a preset time. Circuit (15
), the second timer circuit outputs an output from the output terminal (28a), and when the output signal from the operating terminal (26) of the control circuit (15) is no longer supplied, it is reset and becomes inactive. (29) is the second timer circuit (28)
A second drive signal output terminal from which the control circuit (15) outputs a second drive signal when the control circuit (15) receives a signal from the output terminal (28a) of the second drive signal output terminal (30) is the second drive signal output terminal. This is a second response message sending circuit that becomes operational by receiving the second drive signal output from the terminal (29) and sends a message indicating that the owner is absent to the caller as a second response message. .

The caller selection circuit of the present invention is constructed as described above, and the operation of this circuit will now be described.

First, a first response message and a second response message are stored in the first response message sending circuit (22) and the second response message sending circuit (23). A first message memory circuit and a second message memory circuit are incorporated, and the voice of the owner of the telephone is memorized by the message memorization operation. The first response message is stored as, for example, "Yes, this is 00, but please tell me your name. I will call you."
The second response message may be, for example, ``I'm away at the moment, so please call me again.''

The response message is stored as described above, and the operation as a telephone device will be explained next. First, when making a call, as with any general telephone device, when you remove the handset (13) from the telephone, the well-known hook switch (not shown) is activated.
is switched, the telephone line is closed, and the telephone circuit (12) and the telephone line are connected. In such a state, when the dial operation button (14) corresponding to the telephone number of the desired party is operated, a dial signal corresponding to the operation of the dial operation button (14) is generated from a dial signal generation circuit (not shown). and the telephone circuit (12
) to the telephone line from a hook switch (not shown). In this way, the operation for making a telephone call to a desired party is performed.

As described above, the operation when making a telephone call is performed, but next, the operation when a caller receives a telephone call will be explained. First, the operating time of the first timer circuit (25) is set to 15 seconds, the operating time of the second timer circuit (28) is set to 20 seconds, and the selection switch (4) for selecting caller selection operation/non-operation is set. ) is in the illustrated inoperative position, that is, when it operates as a normal telephone device.

When a ringer signal arrives from the telephone line in the illustrated state, the ringing signal is applied to the first ringing signal generating circuit (3) through the first diode bridge circuit (2).

As a result, the first calling signal output from the first calling signal generating circuit (2) is applied to the first winding (6) constituting the transformer (large) through the selection switch (4). As a result, a first ringing signal is induced in the second winding (8) that constitutes the transformer (sub) and is connected to the amplifier circuit (7), is applied to the amplifier circuit (7), is amplified, and is transmitted to the speaker (
9) is emitted as a ring tone. Therefore, the owner of the telephone will be aware of the incoming call, and by removing the handset (13) from the telephone, the telephone circuit will be closed and the caller will be able to talk to the caller. can.

As described above, operations are carried out when operating as a normal telephone device, but next we will discuss operations 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. explain. When a calling signal arrives from the telephone line when the selection switch (4) is in the operating position, the first calling signal is outputted from the first calling signal generating circuit (3) as described above. In such a state, the signal path to the first winding (6) constituting the transformer (U) is cut off by switching the selection switch (4), so the first call signal is switched to the second winding, I (8). ) and is not emitted as a ringing tone from the speaker (9) via the amplifier circuit (7). Therefore, the first calling signal generation circuit (3)
The first calling signal outputted from the control terminal (16) provided in the control circuit (15) passes through the selection switch (4)
), the control circuit (15) starts the control operation. A signal for performing a closing operation is output to a hook operation control signal output terminal (17) provided in the control circuit (15), and the hook control circuit (11) performs a telephone line closing operation. After such a closing operation is performed, the control circuit (15) switches the switch terminal (18)
A closing signal is output from the first drive signal output terminal (21) and applied to the switch circuit (19), and a first drive signal is output from the first drive signal output terminal (21) and applied to the first response message sending circuit (22). Due to this operation, the switch circuit (19) is closed, and the signal applied to the telephone circuit (12) is applied to the third winding (20) of the transformer, and is induced in the second winding (8) and amplified. The sound is amplified by the circuit (7) and then emitted from the speaker (9). Furthermore, the first response message sending circuit (22) becomes operational, and the message stored in the first message memory circuit, that is, "Yes,
Yes, but please tell me your name. I will call you. ”
A message prompting the name of the other party is output and sent to the caller through the telephone circuit (12), and the telephone circuit (12) also sends a message to the closed switch circuit (19).
), the message is transmitted along the path of the third winding (20) - the second winding (8) - the amplifier circuit (7) - the speaker (9), and is emitted from the speaker (9) to the owner of the phone. I can hear the sound. In order to receive the transmission from the caller who has heard the first response message, the first response message sending circuit (22
), the first drive signal can no longer be output from the first drive signal output terminal (21), and the control circuit (15) outputs the first drive signal from the operation signal output terminal (21).
23) Output the operation signal. Due to this operation, the first response message sending circuit (22) becomes inactive and the voice signal detection circuit (24> becomes active. At the same time as the voice signal detection circuit (24) becomes active, the first response message sending circuit (22) becomes inactive.
The first timer circuit (25) receives the output from the terminal (24a).
) also enters the operating state and performs a counting operation for 15 seconds. In such a state, the calling party who has heard the first response message calls the first response message sending circuit (22).
If a reply message is sent within approximately 15 seconds after the sending operation is completed, the reply message will be sent from the telephone line to the connection terminal (
1) - Second diode bridge circuit (10) - Hook control circuit (11) - Switch circuit (19) in the closed state, which is added to the telephone circuit (12) - Third winding (20) - Second winding ( 8) - Speaker (9) via the amplifier circuit (7) path
A tone will be emitted to the phone owner. As a result, the owner recognizes the other party by listening to their voice. In such a state, the voice signal detection circuit (10) detects the sound of the reply message for approximately 3 seconds or more, thereby detecting the voice signal detection circuit (10).
10) applies an output signal to the control circuit (15) from the second terminal (24b), and also applies the output signal to the first timer circuit (25).
), the signal output from the first terminal (24a) is stopped. Thereby, the first timer circuit (25) is reset. Further, the control circuit (15) receiving the output signal from the second terminal (24b) is connected to the operation signal output terminal (23).
and stop the output signal from the switch terminal (18),
An output signal is output from the operating terminal (26). Through this operation, the audio signal detection circuit (10) and the switch circuit (18)
becomes inactive, but the output signal of the operating terminal (26) is
The second timer circuit is added to the second calling signal generation circuit (27) to activate the second calling signal generation circuit (27) to generate a second calling signal, and is also added to the second timer circuit (28). (28) is also put into operation and a count operation is performed for 20 seconds. In such a state, the second ringing signal output from the second ringing signal generating circuit (27) is routed from the third winding (20) to the second winding (8) to the amplifier circuit (7) of the transformer. The sound is emitted from the speaker (9) to the owner of the telephone, is added to the telephone circuit (12), and is also transmitted to the calling party via the telephone line, so that the calling party is called. make people aware of it. The speaker (
9) The owner recognizes the caller by listening to the voice of the caller emitted by the owner, determines that there is no problem in answering the caller, listens to the second ring tone, and calls 20 minutes after the second ring tone is generated. When the handset (13) is lifted within seconds, the control circuit (15) stops outputting the output signal from the operation terminal (26), puts the second ringing signal generation circuit (27> into an inoperable state, and Second
The timer circuit (28) is reset to an inactive state. Thereby, the owner uses the handset (13) to communicate with the caller. On the other hand, if a response message from the caller is not received for about 15 seconds or more after the first response message is sent to the caller, that is, there is so-called silence, the first terminal of the voice signal detection circuit (24) Since the first timer circuit (25) which is counting by the output signal of 24g> finishes counting for 15 seconds,
The first timer circuit (25) applies an output signal to the control circuit (15). As a result, the control circuit (15) stops outputting the signal output from the hook operation control signal output terminal (17), puts the hook control circuit (11) in an inactive state, and opens the telephone line. The closing signal output from the switch terminal (18) is also stopped, the switch circuit (19) is rendered inactive, the signal emitting operation of the telephone circuit (12) is released, and the telephone device is placed in a standby state. Let it be. Furthermore, as mentioned above, even if a reply message is received from the caller, the caller is an unpleasant person, or the owner is absent, and even if he hears the second ring tone, he does not pick up the handset (13). , approximately 2 minutes from the start of the second ring tone.
If 0 seconds or more have elapsed, the second timer circuit (28) finishes counting for 20 seconds, and the second timer circuit (28) applies an output signal to the control circuit (15). Thereby, the control circuit (15) stops the output signal output from the operating terminal (26), puts the second ringing signal generation circuit (27) into an inoperable state, and resets the second timer circuit (28). and put it in an inoperable state. At the same time, the second drive signal output terminal (29)
A second drive signal is output from the second drive signal, and the second drive signal is applied to the second response message sending circuit (30). As a result, the second response message sending circuit (30) becomes operational, and the message stored in the second message memory circuit, namely, ``I am away at the moment, please call me again'' is sent to apologize for not being able to respond. After the second response message is output, it is passed through the telephone circuit (12) to the hook control circuit (11) and the second guide bridge circuit (10).
- joins the telephone line via the connection terminal (1) and is sent to the calling party; When such an operation is performed and the operation of transmitting the second response message from the second response message transmitting circuit (30) is completed, the control circuit (15) transmits the second response message from the second drive signal output terminal (29). At the same time as stopping the output of the drive signal, the output of the signal output from the hook operation control signal output terminal (17) is also stopped, the hook control circuit (11) is put into a non-operating state, and the telephone line is put into an open state; Put the telephone device into standby mode.

In this embodiment, the switch terminal (1) of the control circuit (15)
8) The closing signal is output from the hook control circuit (1
1), the first response message and the reply message are outputted after the telephone line is closed by the handset (
13) so that the owner of the telephone can listen to the message without having to pick it up; however, after sending the first response message, the control circuit (15)
There is no problem in making it possible to output a closing signal from the switch terminal (18) so that only the reply message can be heard. Furthermore, the audio signal detection circuit (24) in this embodiment
The system applies an output signal to the control circuit (15) and resets the first timer circuit (25) by detecting an audio signal for 3 seconds or more, but when an audio signal is detected, Immediately the first timer circuit (25)
There is no problem in setting the control circuit (15) in a reset state and delaying the signal applied to the control circuit (15) so that the response message can be heard for a long time. Further, in this embodiment, the second calling signal is 2
If the sound continues for 0 seconds or more, the second response message is sent by the output of the second timer circuit (28), but the output time of the second timer circuit (28) can be freely set depending on the situation. There is no problem in leaving it as is.

(G) Effects of the Invention The present invention sends a response message to the caller upon receiving a paging signal from the caller, and only when the caller sends a response message in response to the response message. By notifying the owner of the telephone device of an incoming call from the caller with a ring tone, the owner does not have to go near the telephone device every time a call signal is sent from the caller. Even if the telephone device performs the caller selection operation,
This has saved me a lot of time and effort, and I no longer have to worry about being bothered by silent calls.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram showing an embodiment of the caller selection circuit of the present invention, and FIG. 2 is a flowchart showing the operation of the circuit shown in FIG. Explanation of main drawing numbers (3)...First ringing signal generation circuit, (4)...Selection switch, (12)...Telephone circuit, (15)
...Control circuit, (22)...First response message sending circuit, (24)...Audio signal detection circuit, (27)...
)...Second calling signal generation circuit, (30)...Second response message sending circuit.

Claims (1)

[Claims] (1) response message sending means for sending a response message to a calling party via a telephone line by detecting a ringer signal sent from the calling party;
A voice signal detection circuit that detects the presence or absence of a response message sent by the caller in response to the response message; and a call that generates a calling signal when the voice signal detection circuit detects the presence of the response message. 1. A caller selection circuit for a telephone device, comprising a signal generation circuit, and is configured to notify an incoming call from a caller only when a reply message is sent from the caller.