JPS6350234A - Cordless telephone - Google Patents

Abstract

PURPOSE:To make a general telephone cordless by connecting a device provided with a telephone corresponding circuit and a radio transmitting and receiving circuit to the telephone and connecting a device provided with a radio transmitting and receiving circuit and a telephone line corresponding circuit to a telephone line and connecting both devices with a radio line. CONSTITUTION:A 1st device 200 is provided with a telephone corresponding circuit 201 which sends a call signal to a normal telephone 5, supplies a current, monitors hooking, and has the two wire-four wire conversion function and a radio transmitting and receiving circuit 202 which transmits and receives various signals, which the telephone 5 transmits and receives through the circuit 201, through a radio line 3. A 2nd device 400 is provided with a radio transmitting and receiving circuit 401, which is connected to a telephone line 4 and transmits and receives various signals through the radio line 3, and a telephone line corresponding circuit 402 which transmits and receives various signals, which the circuit 401 transmits and receives, through the telephone line 4. Since devices 200 and 400 are connected through the radio line 3, the device 200 is freely moved in the allowable range of the radio line 3 if only the device 400 is fixedly connected to the telephone line 4, and the telephone 5 connected to the device 200 functions as a cordless telephone.

Description

[Detailed Description of the Invention] [Summary] A device comprising a telephone compatible circuit having calling signal sending, current supply, hooking monitoring, and two-wire/four-wire conversion functions, and a wireless transmitting/receiving circuit is connected to a telephone, and the wireless transmitting/receiving circuit is connected to the telephone. By connecting a device equipped with a and a telephone line compatible circuit that sends and receives various signals to and from the telephone line to the telephone line, and connecting both devices via a wireless line, the -g telephone can be moved in the same way as a cordless telephone. shall be.

[Industrial application field]

The present invention relates to a cordless telephone that allows a telephone that is normally connected to a telephone line to be connected to a telephone line via a wireless line.

[Conventional technology]

FIG. 5 is a diagram showing an example of a conventional cordless telephone system.

In FIG. 5, a cordless telephone stage 1 is connected to a telephone line 4 housed in a telephone exchange, for example, via a radio line 3 and a telephone line connecting device 2. Similarly, a transmitter (T) 11 and a receiver (R) 12 for performing voice calls, a dial key 13 for transmitting a selection signal of the called party (an audio band frequency signal such as a push button dial signal), etc. are connected. In addition to the telephone circuit 14, the wireless transmitter/receiver circuit 15, an antenna circuit 16, and a control circuit 17 are provided.

In the cordless telephone 1, the voice communication signal and selection signal transmitted from the telephone circuit 14, and the monitoring signals such as off-footer and on-footer transmitted from the telephone circuit 14 to the wireless transmitting/receiving circuit 15 via the control circuit 17 are as follows:
The signal is converted into radio signal No. 13 of a predetermined frequency by the radio transmitting/receiving circuit 15 and sent to the radio line 3 via the antenna circuit 16.

In the telephone line connection device 2, the voice call signal and selection signal arriving from the wireless line 3 are received by the wireless transmitting/receiving circuit 22 via the antenna circuit 21, converted into a voice band in-frequency signal, and converted to a two-wire/four-wire conversion circuit. 23 to the telephone line 4.

Further, a monitoring signal arriving from the wireless line 3 is converted into a DC signal by the wireless transmitting/receiving circuit 22 and then transmitted to the control circuit 25 . The control circuit 25 controls the hooking circuit 24 to send a monitoring signal to the telephone line 4.

On the other hand, voice communication signals, calling signals, and other control signals arriving at the telephone line connection device 2 from the telephone line 4 are converted into radio signals of a predetermined frequency by the telephone line connection device 2 through the reverse route to the above-described route, and then The information is transmitted to the cordless telephone 1 via.

As a result, the cordless telephone 1 is not fixedly connected to the telephone line 4 and becomes movable within the allowable range of the wireless line 3.

[Problem that the invention seeks to solve]

As is clear from the above description, in the conventional cordless telephone system, it is necessary to incorporate into the cordless telephone 1 various circuits that ordinary telephones do not have, such as the radio transmitter/receiver circuit 15, the antenna circuit 16, and the control circuit 17. Therefore, with the spread of cordless telephones 1, there is a risk that ordinary telephones, which are already widely used, will become idle equipment.

There also arises the problem that it is difficult to improve the shape of a cordless telephone that incorporates the various circuits described above compared to a general telephone.

[Means for solving problems]

FIG. 1 is a diagram showing the principle of the present invention.

In FIG. 1, 3 is a wireless line, 4 is a telephone line to which a telephone 5 is directly connected, and 5 is a commonly used telephone.

Reference numeral 200 is provided according to the present invention, and includes a telephone compatible circuit 201 having functions of sending a ringing signal to the telephone 5, supplying current, monitoring hooking, and converting between two wires and four wires. This is a first device 200 that includes a wireless transmitting/receiving circuit 202 that transmits and receives via a wireless line 3.

A wireless transmitting/receiving circuit 401 is connected to the telephone line 4 and transmits and receives various signals via the wireless line 3;
This is a second device equipped with a telephone line compatible circuit 402 that transmits and receives data via the telephone line.

[Effect]

The first device 200 and the second device 400 are connected to a wireless line 3.
If only the second device 400 is fixedly connected to the telephone line 4, the first device 200 can be moved freely within the allowable range of the wireless line 3.
The general telephone 5 connected to the first device 200 plays the role of a cordless telephone.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 is a diagram showing a cordless telephone system according to an embodiment of the present invention, FIG. 3 is a diagram showing an example of the telephone connection device in FIG. 2, and FIG. 4 is a diagram showing the telephone line connection in FIG. 2. It is a figure showing an example of a device. Note that the same reference numerals indicate the same objects throughout the figures.

In FIG. 2, the telephone 5 is connected to the telephone connection device 6 (first
The telephone line 4 is connected to the first device 200) in the figure.
telephone line connection device 2 (second device 4 in Fig. 1)
00) is connected, and the telephone connection device 6 and the telephone line connection device 2 are connected by a wireless line vA3.

In FIG. 3, the telephone connection device 6 includes a calling signal sending circuit 61, a current supply circuit 62, and a hooking monitoring circuit 63.
, a two-wire/four-wire conversion circuit 64 and a control circuit 67 are provided as a telephone compatible circuit 201, and a radio transmitting/receiving circuit 65 and an antenna circuit 66 are provided as a radio transmitting/receiving circuit 202.

On the other hand, the telephone line connection device 2 shown in FIG. 4 is the same as that shown in FIG.

In FIGS. 2 to 4, when the telephone 5 makes a call and raises the handset, the current supply circuit 62 supplies a talking current, and the hooking monitoring circuit 63 detects that the telephone 5 is off-hook. is notified to the control circuit 67.

The control circuit 67 transmits a monitoring signal (hereinafter referred to as an off-hook signal) indicating that the telephone 5 is off-hook to the wireless transmission/reception circuit 65.
When the off-hook signal is transmitted to , the wireless transmitting/receiving circuit 65 converts the off-hook signal into a radio frequency and sends it to the wireless circuit vA3 via the antenna circuit 66.

In the telephone line connection device 2, when the radio transmitting/receiving circuit 22 receives the off-hook signal arriving from the radio line Iv13 via the antenna circuit 21, the off-hook signal is converted from a radio frequency signal to a DC signal and then sent to the control circuit 25. introduce.

When the control circuit 25 receives the off-hook signal, it controls the hooking circuit 24 to place the telephone line 4 in an off-hook state.

Thereafter, the voice band frequency selection signal (for example, a push-button dial signal) and the voice communication signal transmitted from the telephone 5 are transmitted to the wireless transmission/reception circuit 65 via the two-wire/four-wire conversion circuit 64 in the telephone connection device 6. The signal is converted to a radio frequency and sent to the wireless line 3 via the antenna circuit 66, and then converted to a voice band frequency by the radio transmitter/receiver circuit 22 in the telephone line connection device 2, and then sent to the telephone line 4. In addition, the voice call signal arriving from telephone line 4 is
It is transmitted to the radio transmission/reception circuit 22 via the two-wire/four-wire conversion circuit 23 in the telephone line connection device 2, converted into a radio frequency, and sent to the radio line 3 via the antenna circuit 21, and is transmitted to the radio transmission/reception circuit in the telephone connection device 6. After being converted into an in-voice band frequency signal by the circuit 65, it is sent to the telephone 5.

On the other hand, when a call arrives at the telephone 5 and a calling signal from the telephone line 4 arrives at the telephone line connecting device 2, the hooking circuit 24 detects the calling signal and transmits the detection result to the control circuit 25. The control circuit 25 receives a control signal (
(hereinafter referred to as a paging control signal) is transmitted to the wireless transmitting/receiving circuit 22.

The radio transmitter/receiver circuit 22 converts the call control signal into a radio frequency and sends it to the radio line 3 via the antenna circuit 21.

In the telephone connection device 6, the wireless transmitting/receiving circuit 65 transmits the call control signal arriving from the wireless line 3 to the antenna circuit 6.
When received via the control circuit 6, the call control all signal is converted from a radio frequency signal to a DC signal and then transmitted to the control circuit 67.

When the control circuit 67 receives the call control signal, it controls the call signal sending circuit 61 and sends the call signal to the telephone 5.

When the telephone 5 picks up the handset and answers, the hooking monitoring circuit 63 detects off-hook and transmits the detection result to the control circuit 6.
7.

Upon receiving the off-hook signal, the control circuit 67 causes the calling signal sending circuit 61 to stop sending out the calling signal, and
The off-off/7-off signal is transmitted to the control circuit 25 of the telephone line connection device 2 via the wireless line 3 through the same route as described above.

In the telephone line connection device 2, the control circuit 25 that has received the off-hook signal controls the hooking circuit 24 to put the telephone line 4 in an off-hook state and to put the telephone line 4 in a response state.

Thereafter, voice communication signals are transmitted and received between the telephone set 5 and the telephone line 4 through the same route as described above.

As is clear from the above description, according to this embodiment, the telephone connection device 6 is connected to the telephone line connection device 2 via the wireless line 3, so that it can be moved. Therefore, the telephone 5 connected to the telephone connection device 6 can also be moved, and the general telephone 5 can be used in the same way as the cordless telephone 1.

Note that FIGS. 2 to 4 are only one embodiment of the present invention, and for example, the first device 200 and the second device 400
The present invention is not limited to the illustrated telephone connection device 6 and telephone line connection device 2, and many other modifications may be considered, but the effects of the present invention remain the same in any case.

(Effect of the invention) As described above, according to the present invention, the first device and the second device are
Since they are connected via a wireless line, if only the second device is fixedly connected to the telephone line, the first device can move freely within the range allowed by the wireless line, and the first device A regular telephone connected to the Internet will function as a cordless telephone.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the principle of the present invention, FIG. 2 is a diagram showing a cordless telephone system according to an embodiment of the present invention, FIG. 3 is a diagram showing an example of the telephone connection device in FIG. 2, and FIG. 2 is a diagram showing an example of the telephone line connection device in FIG. 2, and FIG. 5 is a diagram showing an example of a conventional cordless telephone system. In the figure, 1 is a cordless telephone, 2 is a telephone line connection device, 3 is a wireless line, 4 is a telephone line, 5 is a telephone, 6 is a telephone connection device, 11 is a transmitter (T), and 12 is a receiver (R). , 13 is a dial key, 14 is a telephone circuit, 1
5.22 and 65 are radio transmitting and receiving circuits, 16.21 and 66 are antenna circuits, 17.25 and 67 are control circuits, 23 and 64 are two-wire and four-wire conversion circuits, 24 is a hooking circuit, and 61 is a calling signal sending circuit. , 62 is a current supply circuit, 63 is a hooking monitoring circuit, 200 is a first device,
201 is a telephone compatible circuit, 202 and 401 are wireless transmitting/receiving circuits, 400 is a second device, the principle diagram of Suido Hizuki 1st Senhon Hiragame 1 Te Goroko F and Oti Shimata J- To 2nd Figure Conventional code ゛Shinu, ゛φ2 story〉-r゛Back 5 Figure

Claims (1)

[Claims] A telephone compatible circuit (
201); and a wireless transmitting/receiving circuit (202) that transmits and receives various signals transmitted and received by the telephone (5) via the telephone compatible circuit (201) via a wireless line (3). (200), a wireless transmitter/receiver circuit (401) that transmits and receives the various signals via the wireless line (3), and a wireless transmitter/receiver circuit (401) that transmits and receives the various signals via the telephone line (4). a second device (400) equipped with a telephone line compatible circuit (402) for transmitting and receiving data, and connecting the telephone (5) to the telephone line (4) via the wireless line (3). A cordless telephone characterized by being connected.