JPH0591212A - Radio communication equipment - Google Patents

Abstract

PURPOSE:To obtain the radio communication equipment resulting from radio processing configuration of even other communication equipment such as a telephone set and also a facsimile equipment. CONSTITUTION:The transmission/reception between a station exchange and a terminal equipment 125 are implemented through a modular jack 103, a trunk line adaptor circuit 101 having a trunk line interface circuit 104, and a terminal equipment use adaptor circuit 102 having a terminal equipment interface circuit 118 connecting to the trunk line adaptor circuit 101 in a radio wave.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless communication device for wirelessly transmitting and receiving various information signals such as voice signals.

[0002]

2. Description of the Related Art Conventionally, communication devices such as telephones and facsimiles for transmitting and receiving information have been used in various fields. FIG. 2 shows a schematic diagram of a telephone, which is a type of conventional communication device. In FIG. 2, a telephone set 1 in which a handset 202 and a telephone body 201 are connected with a curl cord 203
25 is an indoor cable 124 and a modular jack 10
It is connected to the exchange of the telephone office via the telephone line 3 and the line L.

When making a call to the outside, the handset 202 is picked up and the called telephone number is dialed. In addition, when there is an incoming call from the outside, the handset 2
Calling becomes possible by picking up 02.

[0004]

In the above-mentioned conventional telephone, in order to freely carry the telephone 125 to a desired position, the indoor cable 124 is lengthened or the modular jack 103 is installed at a convenient place. Had to change to. However, even if the indoor cable 124 is lengthened, there is a problem that the indoor cable 124 becomes an obstacle when carrying the telephone 125. Also,
When changing the mounting position of the modular jack 103, electrical work must be performed, and there is a problem that it cannot be easily performed.

In order to solve the above problem, a telephone in which the curl cord 203 is made cordless is used. However, in the cordless telephone, since the curl code 203 is made wireless, it is not easy to make it wireless by using a general telephone and there is a problem that it cannot be used for other communication equipment such as a facsimile. there were. The present invention has been made in view of the above problems, and an object of the present invention is to provide a wireless communication device capable of wirelessly using not only a telephone but also other communication devices such as a facsimile.

[0006]

A wireless communication apparatus of the present invention has a station line interface circuit, and wirelessly transmits and receives an information signal to and from a central office switch via the station line interface circuit. A telephone adapter circuit having a telephone line adapter circuit and a terminal device interface circuit, and transmitting and receiving information signals wirelessly transmitted and received to and from the telephone line adapter circuit via the terminal device interface circuit. , And a terminal for transmitting and receiving information signals to and from the terminal interface circuit via a signal line.

[0007]

Information is transmitted and received between the central office switch and the terminal through a telephone line adapter circuit and a telephone adapter circuit which are wirelessly connected.

[0008]

FIG. 1 is a block diagram showing an embodiment of the present invention. In FIG. 1, a telephone line adapter circuit 101
Are connected to the central office through a modular jack 103 and a central line L. Modular jack 103
It is connected to an interface (I / F) circuit 104 including a hybrid circuit 105 for 2-wire to 4-wire conversion.
The output terminal of the hybrid circuit 105 is connected to the first input terminal of the transmission circuit 107 including a modulation circuit. Further, the input terminal of the hybrid circuit 105 is connected to the output terminal of the receiving circuit 108 including a demodulation circuit. The modulated wave signal of the first frequency is output from the first output terminal of the synthesizer 109 to the second input terminal of the transmitter circuit 107, and the second output terminal of the synthesizer 109 is secondly connected to the second input terminal of the receiver circuit 108. The demodulated wave signal of the frequency is output. As a result, the transmission circuit 10
7 and the signal output via the antenna 111 is 380
The frequency of the signal receivable from the telephone adapter circuit 102 is set to 250 MHz. The output terminal of the transmission circuit 107 has an antenna coupling circuit 11 including an LC circuit.
It is connected to 0. The first input terminal of the receiving circuit 108 is connected to the antenna coupling circuit 110. Further, the antenna coupling circuit 110 is connected to the antenna 111.

On the other hand, the antenna 112 of the telephone adapter circuit 102 is connected to an antenna coupling circuit 113 composed of an LC circuit. Antenna coupling circuit 11
Reference numeral 3 is connected to the output terminal of the transmission circuit 114 including a modulation circuit. The first input terminal of the transmission circuit 114 is connected to the output terminal of the hybrid circuit 119 for 2-wire to 4-wire conversion. In addition, the antenna coupling circuit 113 is
It is connected to the first input terminal of the receiving circuit 115 configured by the demodulation circuit. The output terminal of the reception circuit 115 is connected to the input terminal of the hybrid circuit 119. The second input terminal of the transmission circuit 114 is the first input of the synthesizer 116.
The second input terminal of the receiving circuit 115 is connected to the output terminal, and the second input terminal of the receiving circuit 115 is connected to the second output terminal of the synthesizer 116. From the first output terminal of the synthesizer 116 to the transmitter circuit 1
The modulated wave signal of the second frequency is output to the second input terminal of 14, and the demodulated wave signal of the first frequency is output from the second output terminal of the synthesizer 116 to the second input terminal of the receiving circuit 115. .. Thus, the signal output via the transmission circuit 114 and the antenna 112 is set to 250 MHz, and the frequency of the signal receivable from the telephone adapter circuit 101 is set to 380 MHz. The output terminal of the control circuit 117 is also connected to each component of the interface (I / F) circuit 118. The I / F circuit 118 is an interface configured so that the conventional telephone 125 shown in FIG. 2 can be connected as it is, that is, the I / F circuit 118 seen from the telephone 125 is equivalent to a central office switch. Is configured to be. The first output terminal of the hybrid circuit 119 in the I / F circuit 118 is connected to the telephone 125. Loop current detection circuit 120 for detecting on-hook (a state where the loop current is small) and off-hook (a state where the loop current is large) of the telephone set 125, the telephone set 125
A power supply circuit 121 for supplying power to the telephone, a call circuit 122 for transmitting a call signal to the telephone 125 when an incoming call is received, and a dial signal detection circuit 123 for detecting a dial signal from the telephone 125, respectively. 125
Connected to. The hybrid circuit 119, the loop current detection circuit 120, the power supply circuit, the calling circuit 122, and the dial signal detection circuit 123 form an I / F circuit.

The operation of the wireless communication apparatus configured as described above will be described below. In FIG. 1, when a call is made from the outside via the central office switch, the call signal is received by the I / F circuit 104 via the modular jack 103. The ringing signal is transmitted by the transmission circuit 107 to 380 MHz.
After being modulated to a signal of z, the signal is wirelessly transmitted from the antenna 111 via the antenna coupling circuit 110.

The radio signal transmitted from the telephone line adapter circuit 101 is received by the antenna 112 of the telephone adapter circuit 102, and demodulated by the receiving circuit 115 via the antenna coupling circuit 113. The demodulated signal is sent to the telephone 125 via the hybrid circuit 119.
Sent to. In response to the call signal demodulated by the receiving circuit 115, the control circuit 117 controls the call circuit 112 to the active state. As a result, a calling signal is sent from the calling circuit 112 to the terminal 125.

The call signal from the telephone 125 is output to the transmission circuit 114 via the hybrid circuit 119.
In the transmission circuit 114, the call signal is transmitted to the synthesizer 11
A signal from 6 is modulated into a signal of 250 MHz and sent to the telephone line adapter circuit 101 via the antenna coupling circuit 113 and the antenna 112. In the telephone line adapter circuit 101, after the modulated signal is received by the antenna 11, it is demodulated by the receiving circuit 108 and is converted into a normal voice signal by the I / F circuit 104 and the modular jack 1.
It is sent to the central office via 03. With the above operation, the telephone call between the telephone 125 and the outside is performed.

When calling an outside line from the telephone 125, first, the telephone number of the other party is dialed from the telephone 125. The dial signal detection circuit 123 detects a dial signal from the telephone 125 and sends a corresponding calling signal to the hybrid circuit 119. The calling signal is transmitted by the transmission circuit 1.
After being modulated by 14, the signal is received by the antenna 111 of the telephone line adapter circuit 101 via the antenna coupling circuit 113 and the antenna 112. The ringing signal received by the antenna 111 is demodulated by the receiving circuit 108 and then I / F.
It is transmitted to the central office switch through the circuit 104 and the modular jack 103. After receiving a response from the outside, a call is made.

In the above embodiment, the telephone adapter circuit 1
I explained that the terminal connected to 02 is a telephone,
Other devices such as a facsimile may be used as long as they are devices that perform information communication via a telephone line. As described above, according to the present embodiment, since the normal wired telephone 125 and the modular jack 103 are made wireless, it is possible to provide a portable wireless communication device. Not only does it occur, but by connecting various communication devices that can be used in a telephone line such as a telephone and a facsimile with the telephone line adapter circuit 101 and the telephone adapter circuit 102, it is possible to easily realize wireless communication. The effect occurs.

Further, since the transmission signal and the reception signal in the telephone line adapter circuit 101 and the telephone telephone adapter circuit 102 are signals of different frequencies, respectively, there is an effect that simultaneous calls can be made without interference.

[0016]

According to the present invention, not only the effect that it is possible to provide a wireless communication device that can be carried around freely, but also various communication devices that can be used in a telephone line such as a telephone and a facsimile are wireless. The effect is that it becomes possible to realize.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is a schematic diagram showing a conventional telephone.

[Explanation of symbols]

 101 ... Telephone line adapter circuit 102 ... Telephone adapter circuit 104 ... Station line interface circuit 118 ... Terminal device interface circuit 124 ... Indoor cable as signal line 125 ... Terminal Machine L: Local line

Claims (1)

[Claims] 1. A telephone line adapter circuit having a station line interface circuit for wirelessly transmitting and receiving information signals to and from a central office through the station line interface circuit, and a terminal unit interface circuit. And a signal between a terminal adapter circuit for transmitting and receiving an information signal wirelessly transmitted to and received from the telephone circuit adapter circuit via the terminal interface circuit, and the terminal interface circuit. A wireless communication device, comprising: a terminal device that transmits and receives an information signal via a line.