JPH05110642A - Cordless telephone set - Google Patents

Abstract

PURPOSE:To prevent illegal use of a telephone line from a 3rd party. CONSTITUTION:The system using the telephone set consists of at least one stationary station and one or plural mobile stations. An ID erasure command transmission means 8 provided to the stationary station sends an ID erasure command to the mobile station and the mobile station receiving the ID erasure command uses an ID code erasure means 17, deletes the ID code stored in an ID code storage circuit. That is, the ID code of the mobile station is deleted by radio communication from the stationary station.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cordless telephone device.

[0002]

2. Description of the Related Art FIGS. 2A and 2B show the configuration of a conventional cordless telephone device. The cordless telephone device is composed of a fixed station shown in FIG. 2 (a) and a mobile station shown in FIG. 2 (b).

In FIG. 2A showing the structure of a fixed station,
A network control circuit 18 is connected to the telephone line.
The transmission circuit 20 and the reception circuit 21 are connected to the network control circuit 18 via the audio circuit 19. Reference numeral 22 denotes an antenna, which is connected to the transmission circuit 20 and the reception circuit 21 and exchanges voice signals for a call. The connection line shown by a solid line is a signal line for audio signals. A CPU 23 is connected to the network control circuit 18, the voice circuit 19, the transmission circuit 20, and the reception circuit 21, and performs various control operations. An ID code storage circuit 24 stores an ID code, and is connected to the CPU 23. The connection line indicated by a dotted line is a signal line for transmitting / receiving a control signal.

On the other hand, in FIG. 2B showing the configuration of the mobile station, 25 is a receiver and 26 is a microphone, which is connected to the voice circuit 27. Transmitting circuit 28 and receiving circuit 29
Is connected to a receiver 25 and a microphone 26 via an audio circuit 27. An antenna 30 is connected to the transmission circuit 28 and the reception circuit 29. Reference numeral 31 is a CPU, which is connected to the audio circuit 27, the transmission circuit 28, and the reception circuit 29, and performs various control operations. An ID code storage circuit 32 stores an ID code and is connected to the CPU 31.

Next, the operation of the above conventional example will be described.
In the mobile station, the CPU 31 communicates control data with the fixed station via the transmitting circuit 28 and the receiving circuit 29 to establish a wireless communication path. Thereafter, the voice circuit 27 is controlled to make a call with the telephone line via the fixed station. When establishing a wireless communication path, it is determined whether or not the ID code as the identification information of the fixed station included in the received data and the ID code stored in the ID code storage circuit 32 match. , If the ID codes match, it is confirmed that the received data is from a fixed station in the same system.

Similarly, in the fixed station, the CPU 2
3 controls the transmission circuit 20 and the reception circuit 21, communicates control data with the mobile station, establishes a wireless communication path, and then controls the network control circuit 18 and the voice circuit 19 to control the mobile station and the telephone line. Make a call mediation with. At the time of establishing the wireless communication channel, the ID code which is the identification information of the mobile station included in the received data and the I code stored in the ID code storage circuit 24.
It is determined whether or not the D code matches, and if the ID code matches, it is confirmed that the received data is from the mobile station within the same system, that is, the mobile station itself.

[0007]

With the rapid spread of cordless telephone devices, the interest of consumers for cordless telephone devices is also rapidly increasing. Along with this, new crimes related to cordless telephone devices have begun to appear.

In the conventional cordless telephone device, the ID code individually given to each device is stored in a separately prepared mobile station of the same model so that wireless communication can be performed with a fixed station of the cordless telephone device in another home or the like. It becomes possible to make a connection by using the uncontracted telephone line. Such a crime has a problem that it is difficult to find a criminal because of the characteristic of the cordless telephone device that uses wireless.

The present invention solves such a conventional problem, and an object of the present invention is to provide a cordless telephone device capable of preventing a crime of theft of telephone lines.

[0010]

In order to achieve the above object, the present invention provides a fixed station with an ID erasure command transmission means, receives an ID erasure command from a fixed station, and stores it in a mobile station. The mobile station is provided with ID code erasing means for erasing the ID code.

[0011]

According to the present invention, when the telephone line is used without permission due to the stealing of the ID code, the stolen ID code is erased to prevent the telephone line from being used thereafter. It has the effect of being able to.

[0012]

1 (a) and 1 (b) show configurations of a fixed station and a mobile station of a cordless telephone device according to an embodiment of the present invention.

In the fixed station shown in FIG. 1A, 1 is a network control circuit, which is connected to a telephone line. The transmission circuit 3 and the reception circuit 4 are connected to the network control circuit 1 via the voice circuit 2. An antenna 5 is connected to the transmitting circuit 3 and the receiving circuit 4. A CPU 6 is connected to the network control circuit 1, the voice circuit 2, the transmission circuit 3, and the reception circuit 4, and performs various controls. 7 is an ID that stores an ID code
A code storage circuit, which is connected to the CPU 6. Reference numeral 8 is an ID erasing command transmission means, which is constructed so as to be controlled by a command from the CPU 6.

On the other hand, in the mobile station shown in FIG.
Reference numeral 9 is a receiver, and 10 is a microphone, both of which are audio circuits 1.
It is connected to 1. The transmission circuit 12 and the reception circuit 13 are also connected to the audio circuit 11. 14 is an antenna,
It is connected to the transmission circuit 12 and the reception circuit 13. CPU
Reference numeral 15 is connected to the voice circuit 11, the transmission circuit 12, and the ID code storage circuit 16 and performs various control operations. Reference numeral 17 denotes an ID code erasing means, which is constructed so that the ID code stored in the ID code storage circuit 16 can be erased under the control of the CPU 15 by receiving an ID erasing command from the fixed station. Next, the operation of the above embodiment will be described.
The CPU 6 of the fixed station controls the transmitting circuit 3 and the receiving circuit 4 by the ID erasing command transmitting means to transmit the ID erasing command to the mobile station by wireless communication. The CPU 15 of the mobile station receives the above-mentioned I received by the receiving circuit 13.
The D code erasing command controls the ID code erasing means to erase the ID code stored in the ID code storage circuit 16.

As described above, according to the above-described embodiment, in order to prevent the theft of the own telephone line, or in order to prevent the theft quickly after the discovery of the theft, the mobile station is controlled by the wireless communication from the fixed station. Even if the ID code exists, the ID code can be erased.

The fixed station and the mobile station are provided with an ID code transmitting means and an ID code writing means, and at the same time as the ID erasing command is sent, a new ID code is sent to the mobile station and erased at the mobile station. Instead of the ID code, a new ID code may be written and stored, and thereafter, the wireless communication path may be established by the new ID code.

[0017]

The present invention has the following effects, as is apparent from the above-mentioned embodiments.

Within the range where wireless communication is possible, the ID code of the mobile station distant from the fixed station is erased so that another person cannot steal his own telephone line.

[Brief description of drawings]

FIG. 1 is a schematic block diagram of a cordless telephone device according to an embodiment of the present invention.

FIG. 2 is a schematic block diagram of a conventional cordless telephone device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Network control circuit 2 Voice circuit 3 Transmission circuit 4 Reception circuit 5 Antenna 6 CPU 7 ID code storage circuit 8 ID erasing command transmission means 9 Receiver 10 Microphone 11 Voice circuit 12 Transmission circuit 13 Reception circuit 14 Antenna 15 CPU 16 ID code storage circuit 17 ID code erasing means

Claims (2)

[Claims] 1. A cordless telephone apparatus comprising a fixed station connected to a telephone line and one or a plurality of mobile stations accommodated by the fixed station wirelessly, wherein the mobile station is a fixed station of the fixed station. The fixed station includes an ID code storage unit that stores an ID code as identification information and an ID code deletion unit that deletes the ID code according to an ID deletion command, and the fixed station sends the ID deletion command to the mobile station. A cordless telephone device, comprising: an ID erasing command transmitting means for performing the above. 2. The mobile station comprises ID code writing means,
The cordless telephone device according to claim 1, wherein a new ID code transmitted from the fixed station is stored in place of the deleted ID code.