JPH0432340A - Incoming call restriction system - Google Patents

Abstract

PURPOSE:To restrict an incoming malicious call and an incoming call at an optional time to a terminal equipment such as facsimile equipment and a telephone set by implementing an interrupt command to a digital communication line receiving an incoming call when a control means confirms that incoming call restriction information is set itself at the arrival of the call. CONSTITUTION:When an incoming call comes from an exchange 3a, a transmission control signal is sent/received between a subscriber's data line terminator 1a and an exchange 3a for the line connection at the arrival of an incoming call from the exchange 3a. The exchange 3a sends a signal to obtain a reply of a called terminal equipment. An incoming call restriction control circuit 6 based on the incoming call restriction information sends a signal to reject a preset incoming call to a digital communication circuit 2 through a signal conversion circuit 7 without normal terminal connection to urge the restoration of the line receiving the incoming call. Then an interrupt command of a digital communication line 2 is sent to execute the incoming call restriction. Thus, an incoming malicious call and an incoming call at an optional time is restricted to a terminal equipment such as facsimile equipment 9 and a telephone set 8.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an incoming call restriction system that restricts incoming calls to a terminal device by a home data line terminating device that converts signals between the terminal device and a digital communication line.

[Conventional technology]

Conventionally, this type of in-home data line termination equipment is equipped with a signal conversion circuit that converts signals in order to interface with telephones, facsimile machines, etc. used as terminal equipment.
When a call is received, if the corresponding terminal device connected to the in-home data line termination device is idle, the call is always accepted and connected to the calling party.

[Problem to be solved by the invention]

As mentioned above, in the conventional method, when a call arrives, it is decided whether or not to connect based on whether or not the terminal device is available at m. Therefore, even if you do not want to accept a call, such as a malicious call or at night, this method can be used. The drawback is that the called terminal device will be called and connected if it is free, regardless of the intention of the user of the terminal device.

An object of the present invention is to provide an incoming call restriction method that can restrict the incoming of malicious calls to terminal devices such as telephones and facsimiles, and the incoming of calls at arbitrary times.

[Means to solve the problem]

The incoming call restriction method of the present invention is an incoming call restriction method in which incoming calls to the terminal device are restricted by an in-home data line termination device that performs signal conversion between the terminal device and the digital communication line, and in which incoming call restriction information to the terminal device is restricted. Set in advance by the setting means and stored in the storage means, and the control means detects the incoming call restriction information stored in the storage means and sets a signal for rejecting the incoming call to the digital communication line. When a call arrives at the terminal device, if it is confirmed that the signal has been set, an instruction to disconnect the digital communication line is issued after transmitting the signal.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

Referring to FIG. 1, which shows an embodiment of the present invention, a home data line termination device 1a on the receiving side is connected to an exchange 3a via a digital communication line 2, and a home data line termination device 1b on the calling side is connected to a digital communication line. 2 to an exchange 3b, and the exchanges 3a and 3b are connected via a transmission line 11.

Then, terminal devices such as a telephone 8, a facsimile 9, and a personal computer 10 are connected to the in-home data line termination device 1a.
, lb, respectively. The incoming data line termination wave W 1 a includes an incoming call restriction setting circuit 4 that sets incoming call restriction for incoming calls to the terminal device, and an incoming call restriction memory that receives signals from the incoming call restriction setting circuit 4 and stores incoming call restriction information. When the incoming call restriction information stored in the circuit 5 and the incoming call restriction memory circuit 5 is detected, and it is set to send a signal to reject the incoming call and it is confirmed that the incoming call restriction information is set at the time of incoming call, the digital Communication line 2
An incoming call restriction control circuit 6 sends back a signal to reject the incoming call and then instructs to disconnect the line, and a signal conversion circuit 7 converts the signal for interfacing the digital communication line 2 and the terminal device. Be prepared. Note that the in-home data line terminating device 1b has the same configuration as the in-home data line terminating device 1a.

When connecting to the telephone 8, facsimile 9, and personal computer 10 on the called side, the home data line termination wave fl
a is the terminal device on the calling side to the home data line terminal device 1b
This is possible by receiving a call made via the exchange 3b and connecting to the corresponding terminal device under the control of the in-home data line termination device 1a.The following describes the incoming call restriction setting method and the connection when setting the incoming call restriction. Explain the operation. First, the user of the telephone 8, facsimile 9, and personal computer 10 on the receiving side presses the incoming call restriction setting/cancellation button (not shown) provided in the incoming call restriction setting circuit 4, thereby setting the incoming call restriction setting. The signal is transmitted to the incoming call restriction storage circuit 5, and the incoming call restriction information is stored in the incoming call restriction storage circuit 5. This incoming call restriction information is canceled by pressing the incoming call restriction setting/cancellation button again. The stored incoming call restriction information is detected by the incoming call restriction control circuit 6, and the incoming call restriction control circuit 6 is set to send a signal to reject the incoming call when receiving an incoming call. When there is an incoming call from the exchange 3a, transmission control signals are sent and received between the home data line termination device 1a and the exchange 3a for line connection. The exchange 3a sends out a signal to request a response from the called terminal, but the incoming call restriction control circuit 6
This can also be used as incoming call restriction information, so a preset signal for rejecting incoming calls is sent to the digital communication line 2 via the signal conversion circuit 7 and connected to the previous line without performing normal terminal connection operations. to encourage the restoration of digital communication lines 2.
issue a disconnection instruction and implement incoming call restrictions.

In this embodiment, a case is shown in which incoming call restriction is applied simultaneously to the terminal devices connected to the in-home data line termination device 1a, but the incoming call restriction setting circuit 4 and the incoming call restriction storage circuit 5 are adapted to each terminal device. It is also possible to apply incoming call restrictions to each terminal device as necessary by inputting incoming call restriction information.

〔Effect of the invention〕

As explained above, the present invention uses the setting means for setting the incoming call restriction provided in the in-home data line terminal device, and the user of the terminal device sets in advance to send a signal to reject the incoming call, and the storage means to store incoming call restriction information,
By configuring the system to issue an instruction to disconnect the incoming digital communication line when the control unit confirms that incoming call restriction information has been set when an incoming call is received, malicious calls to terminal devices such as telephones and facsimiles can be prevented. This has the effect that it is possible to restrict incoming calls and incoming calls at any time.

4...Incoming call restriction setting circuit, 5...Incoming call restriction storage circuit, 6...Incoming call restriction control circuit, 7.
...Signal conversion circuit, 8...Telephone, 9.
...Facsimile, 1o...Personal computer, 11...Transmission line.

Claims (1)

[Claims] In an incoming call restriction method in which incoming calls to the terminal device are restricted by an in-home data line terminating device that converts signals between the terminal device and the digital communication line, incoming call restriction information to the terminal device is set in advance by a setting means and stored. the control means detects the incoming call restriction information stored in the storage means, sets a signal for rejecting the incoming call to the digital communication line, and at the time of incoming call to the terminal device, An incoming call restriction method characterized in that, if it is confirmed that the signal is set, after transmitting the signal, an instruction is given to disconnect the digital communication line.