JPH04108247A - Telephone set with password function - Google Patents

Abstract

PURPOSE:To solve wrong dialing or the like economically by providing a signal generating circuit sending a ring back tone and an off-hook detection circuit detecting off-hook of a telephone set circuit, inactivating a loop generation password request signal generating circuit and connecting the telephone set circuit to a terminal to the telephone set. CONSTITUTION:When an incoming call comes to the telephone set, an exchange sends a call signal and the call signal is detected by a signal detection circuit 5 and its output controls a loop generation password request signal generating circuit 6 to send a password request signal. Then a caller dials further a predetermined number. When a called party replies a call, an off-hook detection circuit 9 is operated to stop the operation of a signal generating circuit 8, a switch 10 is shifted to the position of an upper contact simultaneously and terminals 1,1' are connected directly to a telephone set circuit 2 to form the speech circuit. Thus, the telephone set without wrong dialing and mischievous dialing is realized comparatively economically.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a telephone with a password function installed as a subscriber-side terminal of a subscriber telephone line.

[Prior Art 1] The recent rate of telephone penetration in Japan is remarkable, and we have entered an era in which almost every household has a telephone subscription, and sometimes a household has multiple subscriptions. The spread of such telephones has also led to an increase in the number of mistaken calls (including erroneous connections) and prank calls, and in particular, mistaken calls late at night and prank calls to women living alone are becoming social problems. Various countermeasures are being considered for these problems, but the most representative ones are [11. Dual number system, and after switching to the back number, only calls from people who know the back number will be received. do not.

[2] In the case of nuisance phone calls, ke) Record the other party's voice and send it back to prevent the caller from feeling disgusted.

(2) Changing the voice formant of the responder (for example, changing a female voice to a male voice) to make the caller think that the call was made in the wrong place and give up.

(3) Use an answering machine.

There are other methods.

[Problem to be solved by the invention 1 However, in the case of the dual numbering system in [1] above, one telephone number owned by the public telephone carrier is used, so there is a shortage of telephone numbers and the area code is Now that we are approaching four digits, it is difficult to economically recommend this method to many subscribers.

In addition, (1) and (2) in [2] above each have their own drawbacks, such as the problem with well-intentioned wrong calls or mistaken connections, and the use of answering machines is useless in emergencies. have. Furthermore, said fl), (
3) has the drawback of having to rely on tape recording until a long-term electronic storage device can be produced economically, and that it is less reliable than an all-electronic circuit.

SUMMARY OF THE INVENTION An object of the present invention is to provide a telephone that solves the above-mentioned drawbacks at once and economically by incorporating a password detection function into the telephone itself, which is the terminal of a subscriber's telephone line.

[Means for Solving the Problems 1 The telephone with a PIN function according to the present invention includes a switch that turns one end of the telephone circuit on and off with respect to the terminal, and is activated when the switch is turned on, and detects a ringing signal. a signal detection circuit; a loop creation/PIN request signal generation circuit that is activated by the output of the signal detection circuit to create a DC loop between terminals and sends a PIN request signal to the calling party; and a calling party. A PIN detection/verification circuit that stops sending the PIN request signal when it detects a PIN sent from the PIN and checks the PIN against a pre-registered PIN, and this PIN detection/verification circuit. A signal generation circuit that sends a paging signal to the telephone circuit and a ringback tone to the caller when the correct PIN is detected by the system, and a signal generation circuit that detects off-hook of the telephone circuit and creates a loop and sends a PIN request signal. an off-hook detection circuit for disabling the terminal and connecting a telephone circuit to the terminal.

[Operation] In this invention, when the switch is turned on, an incoming call is immediately answered automatically without generating a ring tone, and the caller is requested to send a PIN number by dialing. It sends a PIN request signal to the caller, and generates a ringing signal and ringback tone only when the correct PIN is received from the caller.If an incorrect PIN is sent, it requests resending of the PIN and then If the number of retransmissions exceeds a predetermined value, the call will be automatically disconnected, and if no PIN is sent within a predetermined time after the automatic answer, or if the caller disconnects, the exchange will issue a busy tone. is sent, or if the called party does not answer within a predetermined period of time after a ring tone is generated, the function is automatically disconnected, and in the case of a call or when the switch is off, the function is equivalent to that of a regular telephone. becomes.

〔Example〕

The drawing is a block diagram showing a circuit according to an embodiment of the present invention. In the figure, 1.1' is a terminal to be connected to a subscriber line exchange, and 2 is a telephone circuit that is exactly the same as a conventional telephone, and includes all functions such as transmitting and receiving functions, calling functions, dialing functions, etc. 3 is a switch that determines whether or not to use the function of this invention, and by attaching the contact point downward (as shown in the figure), this function is turned on.
If it is placed in the upper position, this function is turned off, and terminals 1 and 1' and telephone circuit 2 are passed through, making it no different from a conventional ordinary telephone.In addition, switch 3 is shown as manual in this figure. However, it is of course possible to use software with a special number on the button dial. 4 is an indicator that displays whether the switch 3 is on or off, and for example, a light emitting diode is used to light this when the switch 3 is in the on position. 5 is a ring signal detection circuit from the exchange, 6 is a loop creation/PIN request signal generation circuit, and when the ring signal detection circuit 5 detects a ring signal, the terminals 1 and 1' are connected to DC. This circuit is a loop circuit that creates a state in which a call from the exchange is answered, and a circuit that generates a signal prompting the caller to enter a pre-promised PIN number.This circuit is an automatic answering circuit. As mentioned above, the PIN request signal is issued after the caller has dialed a number, but if it is detected that the caller has dialed some number, the PIN request signal is stopped.7 is PIN detection. , is a verification circuit that detects whether the sent PIN number is the same number, compares it with the PIN number written in advance in the memory in this circuit, and when the two match, sends a message to the signal generation circuit 8. A signal is sent to start this, and if it is incorrect, a signal is sent to the loop creation/PIN request signal generation circuit 6 to resend the PIN request signal and make the caller dial the PIN again.

The loop creation/PIN request signal generation circuit 6 has a circuit that counts how many times its own circuit has re-operated. When a retransmission signal for a PIN request signal is received, the loop circuit within the circuit itself is disconnected, and the incoming call is forcibly disconnected.

Further, the password detection/verification circuit 7 has a timer and outputs a signal to disconnect the loop circuit even when the password is not sent within a certain period of time. When the signal generation circuit 8 operates, 1
An intermittent signal with a weight of 6 Hz and 400 Hz is sent to the telephone circuit 2 to operate a bell circuit or a tone ringer, etc. to ring the called party, and to send a ringback tone to the calling party. , signal interruption time, and contact time are set to be different from those on the exchange side so that the called party 9 is aware that the circuit of the present invention is in operation. 9 is an off-hook detection circuit, and when the telephone circuit 2 is off-hook, the operation of this circuit causes the switch 10 to be activated.
Switch the contact point of
to stop. The off-footer detection circuit 9 may be a relay, an electronic circuit, or the like, or it may be used as is by providing an extra hook contact in the telephone circuit 2. From this, when trying to make a call using telephone circuit 2, switch 1o will reach the upper contact by going off-hook, so even if switch 3 is turned to the on side (attached to the lower contact), Also, switch 3. switch 10
You can make regular calls through. In other words, when making a call, there is no difference from a normal telephone regardless of whether switch 3 is on or off. Reference numeral 11 denotes an interface for writing a personal identification number, which can be used with any suitable device such as a strap, a DIP switch, or a software-compatible button/dial. Note that the power supply used for this circuit may be the power supply from the exchange, or a separate local power supply may be used. In any case, it will be omitted here.

Next, we will discuss how to use and operate this telephone.

First, the purpose of the telephone of this invention is to eliminate prank calls and mistaken calls that come in during the time desired by the telephone installer without causing the telephone to ring. A ring tone must be emitted in response to an incoming call.For this purpose, the installer of this device writes an arbitrary number into the device using the PIN number writing interface 11 shown in the figure, and this PIN number is Of course,
The machine's operation and operation when the machine's authorized number is dialed must be sufficiently explained in advance to those who the machine installer deems necessary.

With the above preparations in place, we will describe the operation when receiving a call with switch 3 of the device turned on (attached to the lower contact). First, when the switch 3 is turned on, the display 4 lights up or indicates that the switch is on. When the machine receives an incoming call in this state, a ringing signal is sent from the exchange. This ringing signal is detected by the signal detection circuit 5, and its output controls the loop creation/PIN request signal generation circuit 6. First, a DC loop is created between terminals 1 and 1'', and the exchange is made responsive.At the same time, a signal different from the dial tone or busy tone of the subscriber telephone, that is, a PIN request signal, is transmitted. For example, send a single tone or intermittent tone of 800 Hz toward terminal 1.1'' at a level of about (-15+L) dBm (here, L is the subscriber line loss (dB) from the exchange to this unit). .

This signal can be heard by the caller, so as agreed in advance, the caller understands that the sound is a request to send a PIN number, and dials the number they agreed upon in advance. This dial, whether it is an MF signal dial or a rotary dial, is detected by a password detection/verification circuit 7 and is compared with a password previously written in the memory. When the PIN detection/verification circuit 7 detects even one digit of the PIN, it sends a signal to the loop creation/PIN request signal generation circuit 6, stops the PIN request signal, and confirms that the PIN has been received by the sender. Let me know.

Here, if it is determined that the PIN number from the caller is correct, the PIN detection/verification circuit 7 sends a signal to the signal generation circuit 8 to activate it. The signal generation circuit 8 generates a ring tone in the conventional telephone circuit 2, and since it is necessary to notify the caller that the caller is being called, the ring signal is a heavy signal of 16 Hz and 400 Hz, and the ring tone is Alternatively, it is assumed that a level sufficient to make the tone ringer ring is sent out, and at the same time, the tone is adjusted to the required level (-15+LdBm) as a ringback tone toward the terminal 1.1' and sent out via the switch 10. However, since it is necessary to notify both the calling and called parties that this calling signal is based on a personal identification number, the intermittent time of the signal should be different from that of the exchange.

When the called party answers, the off-hook detection circuit 9 is activated, and at the same time, the signal generation circuit 8 is stopped, and the switch 1 is activated.
0 to the upper contact and connect terminal 1.1' to telephone circuit 2.
Connect directly to form a communication circuit. Of course, the off-footer detection circuit 9 does not have any influence on call signals, ringing signals, or direct current. switch 1
When o operates, the loop creation/PIN request signal generation circuit 6 is disconnected from the DC current, so the DC loop that was self-maintaining at this time is disconnected. When the call ends and the called party goes on-hook, the switch 10 returns to its original state and returns to the state it was in before the incoming call came in.

If the caller's PIN is incorrect, the PIN detection/verification circuit 7 sends a signal to the loop creation/PIN request signal generation circuit 6 to cause it to send out the PIN request signal again. In this way, the caller is forced to resend the correct PIN number, but if this is repeated several times, the counter in the loop creation/PIN request signal generation circuit 6 forcibly breaks the DC loop and restores the circuit. It ends up. In addition, the loop creation/PIN request signal generation circuit 6 includes a timer and a busy tone detection circuit, and after sending out the PIN request signal,
If even one digit of the PIN number is not sent within a certain period of time, the DC loop is also cut off. Furthermore, if a busy tone is sent from the exchange due to the caller going off-hook, this is detected and the DC loop is disconnected.

As described above, if the PIN number is incorrect, the caller does not do anything after the call is made, or the call is a silent call, or the caller immediately hangs up after knowing that it is a wrong number, the receiving party can forcibly disconnect the call. . The busy tone detection circuit also detects that if the called party does not answer even though the machine is operating normally, such as by leaving switch 3 on and leaving the house, the caller goes off-hook and talks from the exchange. It also has a function that automatically disconnects and restores the device when a medium tone is emitted.

Next, a case will be described in which the device is used to make a call while the switch 3 is on. If the telephone circuit 2 goes off-hook in this state, the off-hook detection circuit 9 operates and the switch 1
Attach o to the upper contact. This allows normal phones and all (
It becomes a similar circuit and can make a transmission. If the switch 3 is turned off, that is, the upper contact is attached, the display 4 will turn off or indicate off, and the communication path will be terminal 1 - switch 3 - off-hook detection circuit 9 - 1i, telephone circuit 2 - terminal 1', and normally Needless to say, it will be similar to the previous phone.

To summarize the operation of the telephone of this invention as described above,
It will look like this:

1. When switch 3 is off, all operations are the same as a normal telephone.

2. When switch 3 is turned on, operation is performed using a password.

(1) When making a call, it operates in the same way as a regular telephone.

(2) In case of incoming call ■ Automatic response based on signals from the exchange.

■ At the same time, request a PIN number dial.

■ The PIN request signal stops when even one digit of the PIN is received.

■ If the PIN is correct, the telephone will generate a ring tone and return a ringback tone to the caller.

■ When the called party responds, it operates in the same way as a normal telephone.

■ If the PIN number is incorrect, you will be asked to send it several times, and if it is incorrect, you will be forcibly disconnected.

■ If the PIN is not sent for a certain period of time after the PIN request signal is sent, the system will be forcibly disconnected.

■ If the caller refuses and a busy signal is sent, the caller will be forced to disconnect.

Note that in the above embodiment, the PIN request signal is a tone,
We have explained that a dial is used to send a PIN number and a digital code is used for verification, but it is also possible to apply a voice synthesis or audio tape system plus tone signal to request a PIN number, a telephone voice to send a PIN number, and specific speaker recognition to verify the PIN number. Of course.

In addition, in this embodiment, PIN number request and detection.

Although the explanation has been made as a single telephone equipped with circuits for verification, signal generation, etc., this PIN number-related circuit is considered to be a single device independent of the telephone, and is used by inserting it between the subscriber telephone line and the conventional telephone. Of course, it is also possible to commercialize the product independently as an adapter.

Furthermore, although the switch 3 is a manual switch, it may be any switch that has the same function as this. The off-hook detection circuit 9 operates using mechanical contacts of the telephone or has a built-in backup power supply.

[Effects of the Invention] As described above, the present invention includes a switch that turns one end of a telephone circuit on and off relative to a terminal, and a signal that is activated when the switch is turned on and detects a calling signal from a caller. a detection circuit; a loop creation/PIN request signal generation circuit that is activated by the output of the signal detection circuit to create a DC loop between terminals and sends a PIN request signal to the calling party; A PIN detection/verification circuit that stops sending the PIN request signal when the transmitted PIN is detected, and checks the PIN against a pre-registered PIN; and this PIN detection/verification circuit. When the correct PIN is detected, a signal generation circuit sends a paging signal to the telephone circuit and a ringback tone to the caller, and a signal generation circuit detects off-hook of the telephone circuit and generates a loop/PIN request signal. It is equipped with an off-hook detection circuit that disables the phone and connects the phone circuit to the terminal, so that calls from people other than those who have known the PIN code in advance can be prevented at necessary times according to the will of the person installing this phone. Since the phone will not ring, you will no longer be bothered by unsolicited calls or have your sleep interrupted by a wrong call in the middle of the night. As can be seen from the block diagram, the present invention has a simple configuration, can be realized relatively economically, and does not affect the numbering plan of public telephone carriers in any way, allowing so-called back numbering. Moreover, since the functions of the present invention can be implemented independently as an adapter, it can be realized economically, and existing telephones are not wasted.

In this way, the use of the telephone according to the present invention eliminates the need to answer unnecessary telephone calls, which greatly contributes to society. Also, with the spread of the telephone of this invention, the fun and effects (threats, etc.) of making prank calls will disappear.
This is highly effective in promoting social order by eliminating people who make prank calls.

[Brief explanation of the drawing]

The drawing is a block diagram showing the circuitry of one embodiment of the telephone according to the present invention. In the figure, 1 and 1' are terminals to be connected to the subscriber line, 2 is a telephone circuit, 3 is a switch, 4 is a display, 5 is a signal detection circuit, 6 is a loop creation/PIN request signal generation circuit, 7
8 is a signal generation circuit, 9 is an off-hook detection circuit, 10 is a switch controlled by the off-hook detection circuit, and 11 is a PIN number writing interface.

Claims (1)

[Scope of Claims] A telephone in which a telephone circuit is connected between terminals connected to an exchange, comprising: a switch that turns one end of the telephone circuit on and off with respect to the terminal; a signal detection circuit that detects a signal; and a loop creation/PIN request signal generation circuit that is activated by the output of the signal detection circuit to create a DC loop between the terminals and sends a PIN request signal to the caller. and a PIN number detection/verification circuit that, when detecting the PIN sent by the caller, stops sending out the PIN request signal and compares the PIN number with a pre-registered PIN number. , a signal generation circuit that sends a paging signal to the telephone circuit and a ringback tone to the calling party when the correct password is detected by the password detection/verification circuit; and detecting off-hook of the telephone circuit. and disables the loop creation/PIN request signal generation circuit, and
A telephone with a password function, comprising: an off-hook detection circuit for connecting the telephone circuit to the terminal.