JPH0530081A - Radiotelephony - Google Patents

Abstract

PURPOSE:To secure the privacy telephone property enable in radiotelephony even in a wire circuit. CONSTITUTION:A connecting device A connected to a telephone network by a wire is provided with a privacy telephone circuit 3 for tuning a sound signal to a privary telephone, a radio transmitting/receiving circuit 5 for modulating and demodulating the sound signal, and a changeover switch 4 for allowing the privacy telephone circuit 3 to bypass, and a radio slave machine B connected to this connecting device A by a wire is provided with a radio transmitting/ receiving circuit 8 for modulating and demodulating the sound signal, and a privacy telephone circuit 9 for tuning the sound signal to a privacy telephone. The chanveover switch 4 is subjected to switching operation in the direction for allowing the privacy telephone circuit 3 to bypass, in the case the privacy telephone circuit of the same system is provided to other telephone set or a radiotelephony connected through the telephone network.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless telephone device comprising a connecting device and a wireless slave device, and more particularly to a wireless telephone device which secretly processes voice modulation signals of wireless communication between the connecting device and the wireless slave device.

[0002]

2. Description of the Related Art A conventional radiotelephone device comprises a connection device A connected to a telephone network as shown in FIG. 2 and a wireless handset B wirelessly connected to the connection device A. When a secret communication connection is made between them, a secret communication circuit is provided in each of the connection device A and the wireless slave device B. That is, the connection device A
Is a network control circuit 2 for converting two lines to four lines with the telephone network connected to the line terminal 1, a confidential circuit 3 for secretly processing the input voice, and a voice signal by modulating the voice signal into a wireless signal. And a wireless transmission / reception circuit 5 for demodulating the wireless signal into a voice signal,
It is composed of the antenna 6. The wireless slave device B includes an antenna 7 that wirelessly connects to the connection device A, and the wireless transmission / reception circuit 5.
And a wireless transmission / reception circuit 8 and a confidential communication circuit 9, which are configured similarly to the confidential communication circuit 3, a receiver 10, and a transmitter 11.

In this configuration, a signal from the telephone network is subjected to confidential communication processing by the confidential communication circuit 3 and is converted into a wireless signal by the wireless transmission / reception circuit 5 and transmitted. The wireless slave device B demodulates the received wireless signal into a voice signal by the wireless transmission / reception circuit 8 and restores the voice signal by the confidential communication circuit 9. On the contrary, in the wireless slave device B, the signal subjected to the confidential processing by the confidential communication circuit 9 is transmitted as a wireless signal by the wireless transmission / reception circuit 8.
The connection device A receives this signal, demodulates it in the wireless transmission / reception circuit 5, restores it in the confidential circuit, and sends it to the telephone network.

[0004]

In the wireless telephone device having such a configuration, since the wireless signal subjected to the confidential communication process is transmitted and received between the connection device A and the wireless slave device B, the confidentiality between them is maintained. Is retained. However, the wired line of the telephone network connected to the connection device A transmits and receives as a normal signal, so that there is a problem that the confidential communication cannot be performed even though the confidential circuit is provided. An object of the present invention is to provide a wireless telephone device that can obtain confidentiality even in a wired line.

[0005]

In a wireless telephone device of the present invention, a connection device which is connected to a telephone network by wire includes a confidential circuit for making a voice signal confidential and a wireless transmission / reception circuit for modulating / demodulating the voice signal. The wireless handset, which is provided with a changeover switch that bypasses the confidential circuit, is wirelessly connected to the connection device and includes a wireless transmission / reception circuit that modulates and demodulates a voice signal and a confidential circuit that secretizes the voice signal. . Here, the changeover switch is configured to perform a switching operation in a direction of bypassing the confidential communication circuit when another telephone or a wireless telephone device connected via a telephone network is provided with the confidential communication circuit of the same system.

[0006]

According to the present invention, by switching the selector switch to the side that bypasses the confidential circuit, the encrypted voice signal can be transmitted to another telephone through the telephone network, and the confidentiality of the wired line is secured. .

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings. 1 is a block diagram of an embodiment of the present invention.
The same parts as those of the conventional configuration shown in FIG. That is, the connection device A is composed of a network control circuit 2 which is connected to the line terminal 1 and performs 2-wire to 4-wire conversion, a confidential communication circuit 3 which performs confidential communication processing, a wireless transmission / reception circuit 5, and an antenna 6. However, here, a changeover switch 4 is inserted between the confidential communication circuit 3 and the wireless transmission / reception circuit 5, and the confidential communication circuit 3 is bypassed by the changeover switch 4 to directly connect the network control circuit 2 and the wireless transmission / reception circuit 5. It is configured to be able to. The wireless slave device B includes an antenna 7 and a wireless transmission / reception circuit 8
, A confidential circuit 9, a receiver 10, and a transmitter 11.

In this configuration, the other telephone connected to the line terminal 1 of the connection device A via the wired telephone network does not have a confidential circuit, or is a system different from the wireless telephone device of the present invention. When connecting to a wireless telephone device having a confidential circuit, the changeover switch 4 is switched to a position where the confidential circuit 3 is not bypassed. Therefore, in the connection device A, the voice input signal from the telephone network is made confidential by the confidential circuit 3, and the radio signal modulated by the voice input signal made confidential by the wireless transmission / reception circuit 5 is output from the antenna 6. This wireless signal is restored via the antenna 7 of the wireless slave device B, the wireless transmission / reception circuit 8, and the confidential communication circuit 9, and is output from the receiver 10. Similarly, the voice output signal from the transmitter 11 is also confidentialized by the confidential circuit 9, converted into a confidential wireless signal via the wireless transmission / reception circuit 8 and the antenna 7, and then transmitted via the antenna 6 and the wireless transmission / reception circuit 5. It is restored by the confidential circuit 3 and output to the telephone network through the network control circuit 2 and the line terminal 1.

On the other hand, when a telephone or a radiotelephone device having a confidential circuit of the same confidential system as the confidential circuit of the present invention is connected to the telephone network, the changeover switch 4 of the connection device A bypasses the confidential circuit 3. Switch to position. As a result, the signal encrypted by the confidential circuit 9 of the wireless slave device B is sent from the line terminal 1 to another telephone or the wireless telephone device through the telephone network without being restored by the connection device A and restored. Further, a confidential signal from another telephone or a wireless telephone device is sent to the confidential circuit 9 through the wireless handsets 5 and 8 without being restored by the confidential circuit 3 through the line terminal 1 as it is, and is restored here. To be done. Therefore, the confidential signal is transmitted and received even in the wired line of the telephone network, and the confidentiality of the wired line is secured.

[0010]

As described above, according to the present invention, in a wireless telephone device in which a wireless communication device and a connection device are provided with a confidential circuit,
Since it is configured so that only the confidential circuit in the connection device can be bypassed by the changeover switch provided in the connection device, it is possible to send the confidential audio signal to the game through the wired line connected to the connection device. By connecting an equivalent wireless telephone device or a telephone having an equivalent confidential circuit to the game, it is possible to send a confidential voice signal in both directions, and at the same time, in addition to the wireless system, the wired system is also confidential. Has the effect of

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of a wireless telephone device of the present invention.

FIG. 2 is a block diagram of a conventional wireless telephone device.

[Explanation of symbols]

A connection device B wireless handset 1 line terminal 2 network control circuit 3,9 Secret circuit 4 changeover switch 5,8 wireless transmission / reception circuit

Claims (2)

[Claims] 1. A connection device connected to a telephone network by wire,
The connection device includes a wireless slave device wirelessly connected to the connection device, and the connection device includes a confidential circuit for confidentializing an audio signal, a wireless transmission / reception circuit for modulating / demodulating the audio signal, and a switch for bypassing the confidential circuit. A wireless telephone device, comprising: a switch; and the wireless slave device including a wireless transmission / reception circuit that modulates / demodulates a voice signal, and a secret communication circuit that secretizes the voice signal. 2. The change-over switch, in the case where another telephone or a wireless telephone device connected via a telephone network is provided with a confidential communication circuit of the same method as the confidential communication circuit, performs a switching operation in a direction bypassing the confidential communication circuit. The wireless telephone device according to claim 1, wherein the wireless telephone device is configured as described above.