JPH03244256A - Malicious telephone call preventing device - Google Patents

Abstract

PURPOSE:To surely remove a malicious telephone call before turning to a speech state by separating a telephone set and a line by a switch means, transmitting a message requesting the input of personal identification information to a called party side when the call is incoming, and connecting the line to the telephone set while turning the switch means on when it is judged that the personal identification information is correct. CONSTITUTION:When the call is incoming from the telephone line connected to a terminal 1, the switch for preventing the malicious call of a switch part 21 is turned on and the current time is included in an initially set malicious call time band, a relay contact 11a of a relay circuit 11 is turned off and the malicious call preventing function of this device is operated. Then, a control part 18 controls a message transmission part 15 and requests the input of the personal identification number to a telephone set on the called party side. When the personal identification number is inputted from the telephone set on the called party side, it is collated with the personal identification number of a personal identification number list stored in an initial set data memory part 22. When the received personal identification number is correct, the control part 18 controls a ringer tone generation part 19 and generates a prescribed ringer tone.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a prank call prevention device for preventing prank calls by telephone, and particularly to a versatile device that can be easily attached to existing telephones.

[Conventional technology]

Conventionally, various devices have been proposed as devices for preventing mischief by telephone. For example, devices have been proposed that, when a call is determined to be a prank call, press a specific switch to generate an impact sound to the other party, or to transmit the other party's voice in reverse. However, such a device must be placed in a one-way call state, which becomes very troublesome if this occurs frequently. Ultimately, such devices cannot be an effective countermeasure against prank calls.

In addition, many of the conventional prank call prevention devices are integrated into the phone, which makes the phone itself expensive. I had to buy a new one.

Therefore, a device has been proposed that is configured separately from the main body of the telephone, identifies whether or not the call is a prank call using a password, etc., and removes the response to the prank call before it becomes a conversation state. For example, in Japanese Patent Application Laid-open No. 11668/1982, by switching the incoming call status, a ring tone is emitted only when a person who knows the secret number calls, and in other cases, it functions as an answering machine, and when the caller calls to prevent the
A prank call prevention method that protects the called party is disclosed. However, in this method, in order to respond to the ringing tone and enter the talking state, it is necessary to operate a switch to change the incoming call state, which is very troublesome.

Further, Japanese Patent Application Laid-Open No. 61-66449 describes a telephone device that makes a buzzer sound only when a predetermined password is input, thereby making it possible to identify whether or not the call is a prank call. However, in this publication, a ringing tone is also generated from the telephone, which is still troublesome.

[Problem to be solved by the invention]

As mentioned above, devices that inflict damage on the other party after a call is made are essentially a countermeasure against prank calls, and devices that are integrated with the telephone are expensive; There is also the problem that the telephones currently in use are wasted, and those constructed separately from the telephones have problems in operability.

Therefore, this invention was made in view of the above points,
To provide an inexpensive and easily imitable device for preventing unsolicited calls, which can reliably eliminate prank calls before they become a telephone call, can be configured as an adapter type separate from a telephone set, and is inexpensive and easy to imitate. .

[Means to solve the problem]

In order to achieve the above object, according to the present invention, when a switch is provided on a line manually input to a telephone,
Detects an incoming call from the line and seizes the line in response to the incoming call. If an incoming call is detected, a message is sent to request the password information based on the other party's phone number in response to the incoming call detection by the incoming call detection means. If a message has been sent, detect the password input manually from the other party's phone. If detected, refer to the password detected by the detection means with the preset password. and control means for turning on a switch means to connect a line to the telephone set if the reference means determines that the password information detected by the detection means is correct.

[For production]

The telephone and the line are separated by a switch, and when an incoming call is received, a message is sent to the other party requesting the input of the PIN information by capturing the four wires, and in response, the other party inputs the PIN information manually. Then, this password information is referred to as previously set password information, and if it is determined to be correct, the switch means is turned on to connect the line to the telephone set. Therefore, in the case of a telephone call, the line will never be connected to the telephone because the user does not know the correct password.

〔Example〕

Hereinafter, one embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram showing an embodiment of the prank call prevention device of the present invention. This device can be connected to a telephone (not shown) as an adapter type.
A telephone line (not shown) is connected to terminal 1, and a telephone is connected to terminal 2. In this embodiment, the telephone connected to terminal 2 is a bush telephone that generates a DTMF signal.

A relay circuit 11 is inserted between terminal 1 and terminal 2,
Contact 11 of this relay circuit 11 is connected between terminal 1 and terminal 2.
separated by a. An incoming call detection section 4, a message sending section 15, and an automatic dialing section 17 are connected to the line 12 on the terminal 1 side of the relay circuit 11.

The incoming call detection unit 14 detects incoming calls from the line connected to the terminal 1, captures and releases the line, and also detects the password and telephone number entered manually from the other party's telephone. Specifically, incoming calls from the line are detected by detecting a 16H2 incoming call signal from the line, and the line is captured and
The release operation is performed by opening and closing the direct current loop of the line, and the detection of the password and telephone number is performed by detecting the DTMF signal generated by pressing the dial key from the other party's telephone. The incoming call detected by the incoming call detection section 14 is notified to the control section 18, and the password and telephone number are temporarily stored in the received data storage section 16.

The message sending unit 15 sends out various voice messages to the line via the line 12 and the terminal 1.

The r1 dynamic dialing section 17 sends the telephone number of the other party to line 12.
, is sent to the line via terminal 1.

An initial setting data storage section 22 is connected to the line 13 on the terminal 2 side of the relay circuit 11.

The initial setting data storage unit 22 stores DTMF generated by pressing the dial key from the telephone connected to the terminal 2.
Initial setting data, such as the current time, tamper-proof time zone, password list, telephone number list, ring tone type, etc., are stored by the signal.

The ring tone generator 19 is set in the initial setting data storage section 22 and generates various ring tones. As will be clear from the explanation below, the ringing tone generated by the ringing tone generator 19 is determined by tone, volume, pitch, and generation in order to distinguish whether it is a normal call, a password, or a matching phone number. It is possible to change the aspect etc.

The display unit 20 displays various information, including the set time, set prank time period, set pin code list, set telephone number list,
The information includes the received password, the telephone number of the other party, the time of the current work, the duration of the call, etc.

The switch unit 21 includes a tamper prevention switch for setting the tamper prevention mode, an answering switch for setting the answering mode, a one-touch dial switch for automatic dialing, and an initial setting switch operated for initial setting. , is equipped with a display confirmation 'switch that is operated when confirming various information on the display section 2°0.

Relay driver 23 is for driving relay circuit 11.

The control unit 18 controls the output of the incoming call detection unit 14 and the switch unit 21.
The message sending unit 1
5. Automatic dialing section 17, ringing tone generating section 19, display section 2
0. Controls the relay driver 23.

When starting to use this device, initial conditions are first set. The initial conditions are set by turning on the initial setting switch of the switch section 21 and operating the dial keys of the bushing telephone connected to the terminal 2. Switch section 21
When the initial setting switch is turned on, this is the control unit 1.
8 is detected, and as a result, the control unit 18 controls the relay driver 23 to turn off the relay contact 11a of the relay circuit 11, and controls the initial setting data storage unit 22 to set the initial setting data storage unit 22 to the write state. do.

In this state, when the dial key of the bushing telephone connected to the terminal 2 is operated, a DTMF signal is input from the telephone to the initial setting data storage section 22, thereby allowing desired initial setting data to be written. Note that since the relay contact 11a of the relay circuit 11 is off at this point, setting data from the telephone is not sent to the line. The initial setting data written in the initial setting data storage section 22 includes the current time, tamper prevention time period, password list, telephone number list, and ring tone type (large/small, pitch, etc.). The initial setting data written in the initial setting data storage section 22 is displayed on the display section 20 by operating the display confirmation switch of the switch section 21, so that the initial setting data can be confirmed.

When the tamper prevention switch of the switch unit 21 is off, this is detected by the control unit 18, and the control unit 18 controls the relay driver 23 to close the relay contact 1 of the relay circuit 11.
1-a is turned on. In this state, the telephone line connected to terminal 1 is directly connected to the telephone connected to terminal 2, and the telephone connected to terminal 2 operates as a normal telephone without a tamper-proof function.

When the tamper-proofing switch of the switch section 21 is turned on, the tamper-proofing function of this device, which will be described in detail later, is activated.

Next, the operation of this device will be explained with reference to the flowcharts shown in FIGS. 2 and 3. When there is an incoming call from the telephone line connected to the terminal 1, and this is detected by the incoming call detection section 14 (step 101), it is then checked whether the tamper-proofing switch of the switch section 21 is on (step 102). . Here, if the tamper-proof switch is off, the tamper-proofing function is not selected, and the telephone operates normally with a ringing tone (step 1).
03).

If the tamper prevention switch of the switch section 21 is on, then it is checked whether the current time is within the initially set tampering time zone (step 104). At this point, since the function will not work if it is not in the time zone, the relay contact 11a of the relay circuit 11 is turned on by the relay driver 23, and the telephone operates as a normal telephone with a ringing tone (step 103). ).

If it is determined in step 104 that it is the tampering time, the relay contact 11a of the relay circuit 11 is turned off by the relay driver 23, and the tamper prevention function of this device is activated. In this case, first, the control unit 18 controls the message sending unit 15 to generate a message requesting the other party's telephone to enter the PIN, for example, "XX, please enter your PIN." , sends this message to the other party's telephone via terminal 1 (step 1υ5)
. Then start the timer (step 106)
. Although this timer is not shown in FIG.
It is located within 8.

When the other party's telephone has a password and this is detected by the incoming call detection section 14, data indicating this password is stored in the received data storage section 16. The control unit 18 checks the PIN number stored in the received data storage unit 16 against the PIN number in the PIN list stored in the initial setting data storage unit 22 to check whether the received PIN number is correct. (Step 107). Here, if the received password is correct, the control section 18 controls the ringing tone generating section 19 to generate a predetermined ringing tone. This ring tone differs from the ring tone generated by a normal telephone in terms of tone, volume, pitch, and manner of generation, such as the frequency of generation, so that it can be identified that the tamper-proof function has been activated. It looks like this. Further, the control unit 18 controls the relay driver 23 to control the relay contact 11 of the relay circuit 11.
Turn on a. In this state, if you go off-hook with the telephone connected to terminal 1, you can talk to the other party's telephone. That is, the telephone enters a normal telephone state in which the ringing tone of the ringing tone generator 19 sounds (step 108). In addition, terminal 1
A signal indicating the off-hook of a telephone connected to the telephone is applied to the control unit 18 via terminal 2, line 24.

If it is determined in step 107 that the received PIN is incorrect, it is checked whether or not there is a call interruption due to on-hook of the other party's telephone (step 109).If there is a call interruption,
The control unit 18 controls the incoming call detection unit 14 to release the captured line and enters a call cutoff state (step 110).

When the timer started in step 106 times out (step 111) when the correct PIN number is not manually entered and the other party's telephone does not cut off the call,
The control unit 18 controls the message sending unit 15 to send a message to automatically call the other party's telephone, for example, "Please press your telephone number on a bushhorn."
This message is sent to the other party's telephone via terminal 1 (step 112). Subsequently, a timer is started (step 113). Next, it is checked whether this timer has timed up (step 114).
If the time-up has not occurred, it is checked whether the call was interrupted by the other party (step 116) and whether the telephone number was sent from the other party (step 117). Here, if the telephone number of the other party has been transmitted, the telephone number of the other party is stored in the received data storage section 16, and this telephone number of the other party is displayed on the display section 20 (step 118).

Next, the telephone number of the other party stored in the received data storage section 16 is checked against the telephone number in the telephone number list stored in the initial setting data storage section 22, and the received telephone number is verified as the telephone number in the telephone number list. Check whether they match (step 119).

When the received telephone number matches a telephone number in the telephone number list, the control section 18 controls one ring tone generating section to generate a predetermined ring tone (step 122). This ringtone is different from the ringtone generated from a normal telephone and the ringtone generated from the ringtone generator 19 when the password is correct, in tone, volume, pitch, generation mode, etc.
This makes it possible to identify that the reception is based on a matching telephone number. When the ringing tone generator 19 generates a ringing tone, a timer is started (step 123).
), before this timer times up (step 1
．． 24) When the telephone connected to terminal 2 goes off-hook (step 125), a normal call state is established (step 126). Here, the user can hear the ringing tone from one of the ringing tone generators, see the telephone number of the other party on the display section 20, and decide whether or not to make a call.

If the received telephone number does not match the telephone number in the telephone number list in step 119, and step 124
If the time-up occurs, the control section 18 controls the message sending section 15 to generate a message indicating that the other party will not receive the message, for example, "I'll call you later," and sends this message via the terminal 1. Then, the controller 8 controls the incoming call detector 14 to detect the detected call on the same line (step 120).Subsequently, the display unit 20 displays the fact that there is a call (step 121). V (removed) and the call is cut off (step 115).

Note that if a time-up occurs in step 114 or if a call cutoff from the other party is detected in step 116, the control unit 18 controls the incoming call detection unit 4 to release the line capture and cut off the call. state (step 115)
).

Next, the operation when the answering switch is turned on using the switch section 21 will be described. When the answering switch is turned on using the switch section 21, the operation is as shown by the broken line in FIGS. 2 and 3. That is, when there is an incoming call from the line connected to terminal 1 (step 101), it is checked whether the answering switch is on (step 127), and if the answering switch is on, the control section 18 turns on the message sending section. 15 to generate a message indicating that you are away, for example, "XX, I am away" (Step 1.28), followed by a message to automatically call the telephone of the other party. , for example, generates "Press your telephone number on a bushhorn" and sends these messages to the other party's telephone via terminal 1 (step 12). Next, a timer is started (step 113), and it is checked whether or not the timer has timed up (step 114). If the timer has not timed up, the call has been cut off from the other party (step 11.6), or the other party has called. Check whether the number has been sent (step 117). Here, if a telephone number has been sent from the other party, the telephone number of the other party is stored in the received data storage section 16, and this telephone number of the other party is displayed on the display section 20 (step 118).

Next, the telephone number of the other party stored in the received data storage section 16 is checked against the telephone number in the telephone number list stored in the initial setting data storage section 22, and the received telephone number is verified as the telephone number in the telephone number list. Check for a match (step 1
19) If the received phone number matches the phone number in the phone number list, it is checked to see if the answering machine switch is on (Step 19).

Bu 12 (L), if the Kagawa switch is on while you are away,...r
Generates a message indicating that the other party has not received the call, for example, "I will call you later" and sends this message to the other party's telephone via terminal 1 (step 120), and displays on the display 20 that there was a call. As shown in step 121), the call is cut off (step 115).

Also, in step 11, if the received phone number and the phone number in the phone number list do not match, step 12
0, similarly generates a message indicating that the other party will not receive the message, for example, "I will call you later", and sends this message to the other party's telephone via terminal 1.Step 120) Telephone call The display unit 20 displays the fact that the call has occurred (step 121), and the call is cut off (step 115).

According to such a configuration, when the recipient returns, he or she can know the telephone number of the other party by looking at the display on the display unit 20.
You can secure a chance to make a call.

Further, when the one-touch dial switch of the switch section 21 is turned on while the telephone number of the telephone number on the t1 hand side is displayed on the display section 20, the control section 18 controls the automatic dial section 17, and the terminal 1 is turned on. A DTMF signal indicating the telephone number of the other party is automatically sent to the telephone line via the telephone line. This makes it possible to automatically make a call using one-touch dialing based on the telephone number of the other party received by the answering machine.

〔Effect of the invention〕

As explained above, according to the present invention, prank calls can be reliably removed before a call is made, and moreover, it can be configured as an adapter type separate from the telephone, making prank calls inexpensive and easy to use. A prevention device can be provided.

Additionally, by turning off the tamper-proof switch as needed, you can selectively remove the tamper-proofing function and allow calls to be made without a PIN code.

Further, even if the caller does not know the password, if the caller's telephone number is in the pre-registered telephone number list, the call can be made, increasing the chances of a call.

In addition, since the ring tone is different depending on whether the call is a regular phone, a pin code, or a phone number list match, the recipient can easily tell what kind of person is calling even if they are far away from the phone. You can know.

In addition, since the caller's personal identification number or telephone number can be known from the display content on the display before picking up the telephone receiver, the caller can selectively respond as necessary.

Furthermore, even if you receive a call when you are not at home, the caller has a function that stores the telephone number of the caller, so the receiver can know it later and make the call.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the prank call prevention device of the present invention, and FIGS. 2 and 3 are flowcharts explaining the operation of the embodiment shown in FIG. 11... Relay circuit, 14... Incoming call detection section, 15.
...Message exit section, 16 received data storage section, 17.
... automatic dialing section, 18... control section, 19... ringing tone generating section, 20... display section, 21... switch section, 22... initial setting data storage section, 23... Relay driver 34

Claims (14)

[Claims] (1) A switch means provided on a line input to the telephone; an incoming call detecting means for detecting an incoming call from the line and seizing the line in response to the incoming call; and responding to the incoming call detection by the incoming call detecting means. message transmitting means for transmitting a message requesting input of PIN information to the other party's telephone; detecting means for detecting PIN information input from the other party's telephone; and PIN information detected by the detecting means. a reference means for referring to preset password information; and if the reference means determines that the password information detected by the detection means is correct, the switch means is turned on to connect the line to the telephone set; A prank call prevention device comprising control means for: (2) The prank call prevention device according to claim (1), further comprising means for generating a ringing tone when the reference means determines that the password information detected by the detection means is correct. Prevention device. (3) The prank call prevention device according to claim (1), further comprising means for releasing the capture of the line if the detection means does not detect the password information input from the other party's telephone within a certain period of time. Prank call prevention device. (4) The prank call prevention device according to claim (1), further comprising means for setting a prank prevention time period, and forcibly operating the switch means during a time period other than the prank prevention time period set by the setting means. and means for turning on the prank call prevention device. (5) The prank call prevention device according to claim (1), further comprising: an answering machine setting means for setting an answering machine state; and when the answering machine setting means sets the answering machine state, the incoming call detection means supports incoming call detection. means for transmitting a message requesting input of the telephone number of the other party instead of transmitting a message requesting input of password information to the other party's telephone; A prank call prevention device further comprising means for storing the telephone number of the other party upon receiving the telephone number of the other party. (6) The prank call prevention device according to claim (5), further comprising means for automatically calling the other party's telephone based on the other party's telephone number stored in the storage means. (7) In the prank call prevention device according to claim (1), if the detection means does not detect the password information input from the other party's telephone within a certain period of time, the message transmitting means sends the message to the other party's telephone. further comprising means for transmitting a message requesting the input of the telephone number of the other party, the detecting means comprising means for detecting the telephone number of the other party input from the telephone of the other party, and the reference means for The control means further comprises means for referencing the telephone number of the other party detected by the detection means with a pre-registered telephone number, and the control means uses the reference means to refer to the telephone number of the other party detected by the detection means and the pre-registered telephone number. The prank call prevention device further comprises means for turning on the switch means to connect the line to the telephone when the registered telephone numbers match. (8) In the prank call prevention device according to claim (7), if the telephone number of the other party detected by the detection means by the reference means matches the pre-registered telephone number, a ring tone is emitted. A prank call prevention device further comprising means for generating prank calls. (9) In the prank call prevention device according to claim (7), if the detection means does not detect the telephone number of the other party inputted from the other party's telephone within a certain period of time, the blocking of the line is released. A prank call prevention device further comprising means. (10) A switch means provided on a line input to the telephone; an incoming call detecting means for detecting an incoming call from the line and seizing the line in response to the incoming call; and responding to the incoming call detection by the incoming call detecting means. a first message transmitting means for transmitting a first message requesting input of password information to the other party's telephone, and a storage means for storing the password information and the telephone number of the other party to whom the call is permitted; a first reference means for referencing the password information input from the other party's telephone with the password information stored in the storage means; and when the reference means determines that the password information input from the other party's telephone is correct; a first control means for turning on the switch means to connect the line to the telephone; and if the reference means determines that the password information input from the other party's telephone is correct; a first ring generating means for generating a ring tone; and a second ring generating means for requesting the other party's telephone number to be entered from the other party's telephone if the password information input from the other party's telephone does not arrive within a certain period of time. 2
a second message transmitting means for transmitting a message;
a second control for turning on the switch means to connect the line to the telephone when the telephone number of the other party inputted from the telephone of the other party matches the telephone number of the other party stored in the storage means; and second ringing tone generating means for generating a second ringing tone when the telephone number of the other party inputted from the telephone of the other party matches the telephone number of the other party stored in the storage means. A prank call prevention device comprising: a cutoff means for releasing the line from capture if the telephone number of the other party inputted from the other party's telephone does not arrive within a certain period of time. (11) Claim (10) wherein the first ring tone is different from a normal ring tone of the telephone, and the second ring tone is different from the first ring tone and the normal ring tone of the telephone. The described prank call prevention device. (12) The prank call prevention device according to claim (10), further comprising means for setting a prank prevention time period, and forcibly operating the switch means during a time period other than the prank prevention time period set by the setting means. and means for turning on the prank call prevention device. (13) The prank call prevention device according to claim (10), further comprising: an answering machine setting means for setting an answering machine state; and when the answering machine setting means sets the answering machine state, the incoming call detection means supports incoming call detection. means for transmitting a message requesting input of the telephone number of the other party instead of transmitting a message requesting input of password information to the other party's telephone; A prank call prevention device further comprising means for storing the telephone number of the other party upon receiving the telephone number of the other party. (14) The prank call prevention device according to claim (13), further comprising means for automatically calling the other party's telephone based on the other party's telephone number stored in the storage means.