JPH01157141A - Telephone transfer privacy telephone system - Google Patents

Abstract

PURPOSE:To prevent tapping on a first line from being performed and to easily perform a speech with an unspecified opponent via a second line by cancelling privacy telephone on the first line on which the privacy telephone is applied, and connecting it to the second line. CONSTITUTION:When the speech is performed, outgoing by a telephone number corresponding to arbitrary privacy telephone means 721-72n in a telephone transfer privacy telephone system 7 is performed first by an automobile telephone set 1. Also, on the telephone set 1, privacy telephone means which make pairs with the means 721-72n are provided. In such a way, the telephone set 1 is connected to a radio equipment 2, a communication control unit 3, a switched line 4, a communication control unit 71, an arbitrary means out of the means 721-72n, and a communication control unit 73. At this time, a signal from the unit 71 is supplied to a talkie device 74, and a voice signal to expedite the information of connection to a privacy telephone system and the input of the telephone number of an opponent is generated, and it is supplied to the unit 73, and is supplied to the telephone set 1 in a reverse path. And when the telephone number is inputted, the signal is supplied to the device 7, and is connected to a general subscriber telephone set 8 via the line 4, the exchange of a central office, and a communication control unit 5, thereby, the speech between the telephone sets 1 and 6 can be performed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a telephone transfer privacy device suitable for use in conjunction with so-called car telephones and the like.

[Summary of the invention]

The present invention relates to a telephone transfer confidential communication device, which cancels the confidentiality of a first line on which a confidential call has been made and connects it to a second line. Works well even when using a low line! This increases the A-density level and allows connection to a regular telephone as a second line.

[Conventional technology]

2. Description of the Related Art Wireless telephone devices such as so-called car telephones and cordless telephones are becoming popular.

By the way, wiretapping of communications (telephones) is a crime under telecommunications-related laws and regulations, but wiretapping is generally much more difficult in the case of wireless communications compared to wired communications, and was virtually allowed to go unchecked. .

In response to this, the transmitting side swaps the frequency and time axis of the audio signal so that even if the audio signal being transmitted is intercepted, the content cannot be determined, and the receiving side undoes the above swapping. A secret device has been proposed.

[Problem that the invention seeks to solve]

However, when using such a confidential communication device, it is necessary to provide a paired encoder and decoder of the confidential communication device on each of the transmitting side and the receiving side.

Therefore, it is not possible to communicate with other than predetermined devices using confidential communication.

By the way, for example, in a car phone, the security level is low in the portion that uses wireless between the car and the base station, as described above, and the security level in the wired portion thereafter is considered to be relatively high.

This application has been made in view of these points.

[Means for solving problems]

In the present invention, an arbitrary confidential message means ('/2) is provided, and a first confidential message means corresponding to the arbitrary confidential message means is provided.
line (control device (71)) is connected, and the second line (control device (71)) is connected.
line (control device (73)) is connected, and the signal from the first line is decoded by the confidential communication means and transmitted to the second line.
The telephone transfer privacy device is configured such that the signal from the second line is encoded by the privacy means and sent to the first line.

(Function) According to this, by canceling the confidentiality of the first line on which a confidential call has been made and connecting it to the second line, the security level of the first line is increased and wiretapping of a car phone, etc. It is possible to effectively prevent the risk of this, and to easily communicate with an unspecified party through the second line.

〔Example〕

In Figure 1, (1) is a car phone installed in a car, and this phone (1) is connected to a base station radio (2) via radio, and this radio (2) is connected to a line control device. It is connected to the wired public line (4) through (3). This causes the car phone (1) to make a call (outgoing call)
When this operation is performed, for example, a tone signal from a telephone number button is supplied to the public line (4), and the telephone exchange equipment (
(not shown) is connected to the general subscriber telephone (6) through the corresponding line control device (5), and the car telephone (
1) and a telephone (6).

On the other hand, (7) in the figure is an example of the telephone transfer secret device according to this application, in which the public line (4) is connected to the line control device (71), and the selected telephone line is connected to the line control device (71). Each line is a secret means (72z) (722)
... is connected to the line control device (73). This control device (73) is connected to the public line (4). Furthermore, the signal from the control device (71) is transmitted to the talkie device (74).
) and transmitting device (75), and these devices (7
4) The signal from (75) is fed to the selected line of the control device (73).

When making a call using this device, first make a call using the car phone (1) to a telephone number corresponding to any confidential communication means (721) (722)... of the telephone transfer confidential communication device (7). will be held. Note that the car telephone (1) is provided with confidential communication means (721), (722), and so on. This allows the car phone (
1) is a radio (2), a control device (3), and a public line (4)
, control device (71), optional secret means (721) (
722)... is connected to the control device (73). At this time, the signal from the control device (71) is
For example, [Currently connected to a confidential device. Please enter the recipient's phone number. ” is generated, and this audio signal is transmitted to the control device (73
), and following the above connection in reverse, the car phone t
a(1). After hearing this voice signal, when the other party's telephone number is entered manually, a signal corresponding to this telephone number is supplied to the control device (71) through the above-mentioned connection, and this signal is supplied to the transmitting device (75). An operation is performed to make a call (outgoing call) to the entered telephone number. As a result, a signal corresponding to the above-mentioned telephone number is supplied to the public telephone line (4) through the control device (73), and is connected to the general subscriber telephone (6) through the corresponding line control device (5) by the telephone office converter. , car phone (
11 and electricity? A call is made with J1 aircraft (6). Note that by treating the telephone numbers of the confidential communication means (721), (722), etc. as so-called representative telephone numbers, it is possible to eliminate the possibility that calls to the same confidential communication means will be interrupted and become busy.

Therefore, according to this device, the confidentiality level of the wireless line can be increased by canceling the confidentiality of the first line (wireless) on which a confidential call has been made and connecting it to the second line (public line = wired line). This effectively prevents the risk of eavesdropping on devices such as car telephones, and makes it easy to talk to unspecified parties through public telephone lines.

Furthermore, FIG. 2 shows the configuration of a car telephone that can be used in the above-mentioned apparatus. In this figure, a telephone main body (11) is connected to a radio set (12), and a call is made through a radio line. On the other hand, when using the above-mentioned telephone transfer secret device (7), the function button (ll) provided on the main body (11) is used.
When an arbitrary secret message is pressed from b), a control signal is supplied to the secret message selection device (13), and an arbitrary selection signal is supplied to the secret message means (14). As a result, any secret message selected for the audio signal of the main body (11) is encoded and decoded. In addition, the selection device (
13) is supplied to the telephone number memory (15), and the telephone number of any secret means (721), (722), etc. of the device (7) corresponding to the selected secret call is retrieved. This telephone number is supplied to the transmitting device r& (16), and a call control signal from the main body (11) is supplied to the transmitting device (16), and a predetermined dialing operation signal and telephone number are sent to the transmitting device (16). It is emitted (fi) through a radio (12).

Therefore, the user can automatically connect to the device (7) by operating Ren Ci's secret message in the function button (llb), and then wait for a response from the device (7) and enter the phone number. A connection with a desired telephone (6) can be established by simply inputting the telephone number of the other party using the button (lla).

Furthermore, depending on the method used for the secret story method, the secret story effect (
level) and characteristics, but it is also possible to incorporate these multiple means into the confidential information means (14) and set it to any confidential information level by selecting the function button (llb>).In that case, each Confidential means (721) corresponding to (
722)... can be provided in the memory (15) so that the required telephone number can be retrieved in response to a signal from the selection device (13).

In addition, in the above-mentioned device (7), calls from the control device (73) require separate telephone charges; however, if the above-mentioned device (7) is operated as a members-only confidential information center, for example, this fee may be charged. It is necessary to bill the party who called the control device (71) for the fee. In that case, the above memory (1
5) etc. may be provided with a unique ID number etc., and this ID number etc. may be read out at the time of connection to drive the billing device etc.

Furthermore, by automatically making a call using the telephone number stored in the memory (15), the confidential communication means (72
1) <722)... can be made private to prevent unauthorized use.

〔Effect of the invention〕

According to this invention, by canceling the confidentiality of the first line on which a confidential call has been made and connecting it to the second line, the security level of the first line is increased and there is a risk of eavesdropping on a car phone, etc. It has become possible to effectively prevent communication problems and to easily communicate with unspecified parties through the second line.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of an example of the present invention, and FIG. 2 is a diagram for explaining the same. (1) is a car phone, (2) is a radio, +3+(51
(71) (73) is a line control device, (6) is a telephone, (
7) is a telephone transfer secret device, (721) (722)・
. . is a confidential communication means, (74) is a talkie device, and (75) is a transmitting device.

Claims (1)

[Scope of Claims] An arbitrary confidential communication means is provided, a first line provided with a confidential communication means corresponding to the arbitrary confidential communication means is connected, and a second line is connected, A signal from the line is decoded by the confidential communication means and sent to the second line, and a signal from the second line is encoded by the confidential communication means and sent to the first line. Telephone transfer secret device.