JP2716710B2 - Phone transfer secret device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a telephone transfer confidential device suitable for use in a so-called car telephone or the like. [Summary of the Invention] The present invention relates to a telephone transfer confidential communication device, which releases a confidential speech from a confidential first line and connects the confidential conversation to a second line so that a car telephone or the like can be used as the first line. Even when a line with a low security level is used, the security level is satisfactorily increased to enable connection to a general telephone as a second line. [Prior Art] Telephone devices using radio such as so-called car phones and cordless phones have become widespread. By the way, eavesdropping on communication (telephone) is a crime according to laws and regulations related to telecommunications, but in general, in the case of wireless communication compared to wired communication, it is extremely difficult to prove eavesdropping and the like, and it has been practically unchecked. On the other hand, the frequency spetrum and the time axis of the audio signal are exchanged on the transmission side so that the content of the audio signal being transmitted cannot be determined even if the eavesdropping is performed, and the above-mentioned exchange is restored on the reception side. Secret talkers have been proposed. [Problems to be Solved by the Invention] However, when such a confidential device is used, it is necessary to provide a pair of confidential device encoder and decoder on each of the transmitting side and the receiving side. Therefore, a call with a device other than a predetermined device cannot be made using confidential communication. By the way, for example, the low security level of a car telephone is considered to be relatively high in a portion using wireless communication between a vehicle and a base station as described above, and in a portion using a wire thereafter. The present application has been made in view of such a point. [Means for Solving the Problems] According to the present invention, a plurality of confidential means (14) are provided, and a plurality of confidential means (7
When a call is made by a specific telephone number from a first line (control device (3)) including at least a wireless line provided with 2), the call is connected to the first line, and
In addition, the telephone number transmitted from the first line
(A control device (5)), and a signal encoded in the privacy mode selected by the specific phone number of the first line is decoded by the privacy mode corresponding to the selected privacy mode. Out of the second line, and a signal from the second line is encoded by the confidential means corresponding to the selected confidential means so as to be transmitted to the first line.
This is a telephone transfer confidential communication device to be transmitted to a line of a telephone. [Operation] According to this, the secrecy level of the first line on which the secrecy is spoken is released and the secrecy level of the first line is increased by connecting to the second line, thereby eavesdropping on a car telephone or the like. Can be satisfactorily prevented, and a call with an unspecified partner can be easily made through the second line. [Embodiment] In FIG. 1, (1) is an automobile telephone mounted on an automobile, and this telephone (1) is connected to a radio (2) of a base station through radio, and this radio (2) Is connected to a wired public line (4) through a line controller (3). When a call (originating) operation is performed on the automobile telephone (1), a tone signal from, for example, a telephone number button is supplied to the public line (4), and is switched by a telephone exchange system (not shown). The telephone is connected to the general subscriber telephone set (6) through the corresponding line control device (5), and a call is made between the mobile telephone set (1) and the telephone set (6). On the other hand, in the figure, (7) is an example of the telephone transfer privacy apparatus according to this application, in which the public line (4) is connected to the line controller (71) and selected by the controller (71). line is connected to the line control unit (73) respectively polarized means (72 ₁₎ (72 ₂₎ ... through. This control device (73) is connected to the public line (4). Further, the signal from the control device (71) is supplied to the talkie device (74) and the transmitting device (75), and the signal from these devices (74) and (75) is supplied to the selected line of the control device (73). Is done. And in case of a call using this apparatus, firstly any Confidential means (72 ₁₎ of the call forwarding scrambler in an automobile telephone (1) (7) (72 ₂₎ ... calling the phone number corresponding to the Is performed. The car phone (1) has secret means (72
₁ ) (72 ₂ ) ... is provided with confidential means. This automobile telephone (1) is radio (2), the control unit (3), a public line (4), the control unit (71), any privacy means (72 ₁₎ (72 ₂₎ ... through the control unit (73 ). Also, at this time, a signal from the control device (71) is supplied to the talkie device (74), and a voice signal is generated, for example, "Now connected to the secret device. Please enter the telephone number of the other party." This audio signal is sent to the control unit (7
It is supplied to 3) and is supplied to the mobile telephone (1) by following the above connection in reverse. When the telephone number of the other party after inputting the voice signal is input, a signal corresponding to the telephone number is supplied to the control device (71) through the above connection, and the signal is supplied to the transmission device (75). An operation for calling (originating) the inputted telephone number is performed.
As a result, a signal corresponding to the above-mentioned telephone number is supplied to the public line (4) through the control unit (73), and connected to the general subscriber telephone set (6) through the corresponding line control unit (5) by the converter of the central office. Thus, a call is made between the automobile telephone (1) and the telephone (6). The telephone numbers of the confidential means (72 ₁ ) (72 ₂ )... Are treated as so-called representatives, so that it is possible to eliminate the possibility that calls to the same confidential means are busy and busy. Therefore, according to this device, the secrecy level of the first line (wireless) to which the secrecy is spoken is released, and the secrecy level of the wireless line is increased by connecting to the second line (public line = wired). Thus, the possibility of eavesdropping on a device such as a car telephone can be prevented well, and a call with an unspecified party can be easily made through a public line. FIG. 2 shows a configuration of a mobile telephone applied to the above-described apparatus. In this figure, a telephone body (11) is connected to a wireless device (12) to make a call through a wireless line. On the other hand, when the above-mentioned telephone transfer secret device (7) is used, the function button (11b) provided on the main body (11) is used.
When an arbitrary confidential button is pressed from among these, a control signal is supplied to the confidential selection device (13), and an arbitrary selection signal is supplied to the confidential means (14). Thereby, encoding and decoding of an arbitrary secret story selected for the audio signal of the main body (11) is performed. Further, a signal from the selecting device (13) is supplied to the telephone number memory (15), and any confidential means (72 ₁ ) (7) of the device (7) corresponding to the selected confidential speech is provided.
2 ₂ ) The phone number is retrieved. This telephone number is supplied to the transmitting device (16), and a control signal for calling (originating) from the main body (11) is supplied to the transmitting device (16), and the signal of the predetermined transmitting operation and the telephone number are transmitted wirelessly. It is transmitted through the machine (12). Therefore, the user can automatically connect to the device (7) by operating an arbitrary secret button among the function buttons (11b), and then waits for a response from the device (7) to wait for a response from the device (7). A desired telephone (6) can be connected only by inputting the telephone number of the other party in 11a). There are a variety of confidential effects (levels) and characteristics depending on the method and the like of the confidential means. Any confidential level can be used. In that case, the telephone numbers of the corresponding secret means (72 ₁ ) (72 ₂ ) are provided in the memory (15), and the necessary telephone numbers are taken out according to the signal from the selecting device (13). be able to. In addition, in the above-mentioned device (7), a call from the control device (73) requires a separate telephone charge. For example, when the above-mentioned device (7) is operated as a membership-based confidential center, this call is not required. It is necessary to charge a fee to the party who has multiplied the control device (71). In this case, a unique ID number or the like is provided in the memory (15) or the like, and the ID number or the like can be read out at the time of connection to drive the billing device or the like. Further, by making an automatic call using the telephone number stored in the memory (15), the secret means (72 ₁ )
(72 ₂₎ ... telephone number as private, which can be prevented from being used illegally. [Effect of the Invention] According to the present invention, the secrecy level of the first line to which the confidential conversation is applied is released and the secrecy level of the first line is increased by connecting to the second line, so that the car telephone In addition to preventing the possibility of eavesdropping, etc., it is possible to easily make a call with an unspecified partner through the second line.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a configuration diagram of an example of the present invention, and FIG. 2 is a diagram for explaining the configuration. (1) is an automobile telephone, (2) is a radio, (3) (5)
(71) (73) is a line controller, (6) is a telephone, (7)
Is a telephone transfer confidential device, (72 ₁ ) (72 ₂ ) ... is a confidential means,
(74) is a talkie device, and (75) is a transmitting device.

Claims (1)

(57) [Claims] A plurality of confidential means are provided, and when there is a call with a specific telephone number from a first line including at least a wireless line provided with a plurality of confidential means corresponding to each of the plurality of confidential means, Connected to the first line, and a second telephone number transmitted from the first line
The signal which is connected to the line of the first line and which is encoded by the privacy unit selected by the specific telephone number of the first line is decoded by the privacy unit corresponding to the selected privacy unit and is transmitted to the second line. A telephone transfer privacy device which is transmitted and encoded by a privacy means corresponding to the selected privacy means and transmitted to the first line.