JPS62155643A - Privacy telephone system - Google Patents

Abstract

PURPOSE:To control the privacy call circuit by data input by providing a controller controlling the operation of the privacy call circuit by the data input. CONSTITUTION:An input data from a terminal 1 is inputted to a privacy call circuit 3. An input data and a data passing through the circuit 3 are inputted to a switch 4. The data inputted from the data input terminal 1 and the output data of the privacy call circuit 3 are inputted to a data storage device 5. A discrimination circuit 6 discriminates whether the data stored in the device 5 is an ON instruction or an OFF instruction. Either or both the results of discrimination are selected by a selection device 7 and given to the switch 4. When the data is a privacy call circuit ON instruction, the switch is switched so that the output of the privacy call circuit 3 is outputted at an output terminal 2. Conversely, when the data is a privacy call circuit OFF instruction, the switch 4 is switched so that the data is outputted to the terminal 2.

Description

[Detailed description of the invention] [Industrial use alter ego J The present invention relates to a confidential communication device.

``Prior Art'' FIG. 2 is a block diagram showing a conventional confidential communication device. In FIG. 4) is a switch, and (8) is a switch control input terminal for controlling the switch.

Next, the operation will be explained. Data input from the data input terminal (1) is input to the secret speech circuit (3).

The switch (4) receives the data input from the data input terminal (1) and the data after passing through the confidential communication circuit (3), and depending on the input data from the switch control input terminal (8), either Select and output to data output child (2).

[Problem J to be Solved by the Invention Since the conventional confidential communication device is configured as described above, there are problems such as the need to input whether or not to operate the confidential communication circuit.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a confidential communication device in which the operation of a confidential communication circuit can be controlled by data.

[Means for Solving the Problems] The secret communication device according to the present invention is provided with a control device that can control the operation of the secret communication circuit by inputting data.

C Effect J The confidential circuit control device in this invention is controlled by either or both of the input data from the data input terminal and the output data of the confidential circuit, and controls the operation of the switch or the confidential circuit.

Example J An example of the present invention will be described below with reference to the drawings. 1st
In the figure, (1) is a data input terminal, (2) is a data output terminal, (3) is a confidential communication circuit, (4) is a switch, and (5) is a data output terminal.
) is a data storage and reconnaissance device that stores data from the data input terminal (1) and the output of the secret circuit (3); A determination device that determines whether the command is to L/i0F'F, and a selection device that selects whether the command is from the data output terminal (2) or the output of the secret circuit (3). .

Next, the operation will be explained. Data input from the data input terminal (1) is input to the secret circuit (3). The switch (4) K receives the data input from the data input terminal (1) and the data after passing through the confidential communication circuit (3).The data storage device (5) receives the data input from the data input terminal (1). Input data and secret circuit (3)
Input the output data of each. Judgment circuit (6)
determines whether the data stored in the data storage device is a 柘rYi电路ON command or an orr command.

The judgment result is transmitted to the switch (4) with either or both selected by the selection device (power). If the data is a secret circuit ○N command, the output of the secret circuit (3) is the data output. Switch (4) so that the output is output to terminal (2).
) can be switched. Conversely, if the secret circuit OE'E' is 7t, the switch (4) is set so that the data at the data input terminal (1) is output as is to the data output terminal (2).
can be switched.

In addition, in the above-mentioned medical embodiment, the switch (4) is controlled to change over, but the switch (4) may be controlled to change the dark key of the secret circuit.

[Effects of the Invention J As described above, the present invention has the advantage that the confidential communication circuit can be controlled by data input.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a secret communication device according to an embodiment of the present invention, and FIG. 2 is a block diagram showing a conventional secret communication device. In the figure, (1) is a data input terminal, (2) is a data output terminal, (3) is a confidential communication circuit, (4) is a switch, and (5) is a data output terminal.
) is a data storage device, (6) is a determination device, (7) is a selection device, and (8) is a switch control input terminal. In addition, in the figure, the same - mark indicates the same or equivalent 815 minutes.

Claims (1)

[Claims] a first discriminating circuit that determines whether an input to the secret circuit is an instruction that uses the secret circuit or an instruction that does not use the secret circuit; 1. A secret speech device comprising: a second discrimination circuit; a circuit for selecting one of the outputs of the first and second discrimination circuits; and means for receiving the output of this circuit and switching between the output and the input of the secret speech circuit.