JPH05110732A - Method and equipment for facsimile radio communication - Google Patents

Abstract

PURPOSE:To provide the facsimile radio communication equipment in which a head interruption-and a tail interruption of a signal generated when a facsimile signal is communicated in a radio wave. CONSTITUTION:The communication equipment is provided with a signal separate circuit 2 extracting a signal component from a facsimile transmission signal, a transmission start circuit 3 starting a radio transmission section 6 when a level of an output signal reaches a prescribed value, a signal delay circuit 4 delaying a signal of the signal separate circuit 2 for a prescribed time, a transmission stop circuit 5 stopping the operation of the radio transmission section 6 with the reduction in the signal of the signal delay circuit 4, and the radio transmission section 6 modulating the signal of the signal delay circuit 4 and sending the result on a radio wave. A head interruption is eliminated by starting the radio transmission section 6 through the arrival of a signal from a facsimile equipment and delaying the signal and inputting the result as the radio transmission signal and a tail interruption is eliminated by sending no radio transmission through the reduction in the delayed signal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a FAX wireless communication method and a communication device capable of wirelessly transmitting and receiving information using a FAX which transmits and receives document information via a telephone line.

[0002]

2. Description of the Related Art FAX communication using a conventional line is N
The two FAXA and FAXB are communicated in almost real time via the TT converter. In recent years, a FAX wireless communication device has been used in which the FAX signal is placed on a wireless communication device to communicate by radio waves. This is as shown in Figure 3.
Install an adapter between the FAX and wireless transmitter to
The wireless transmitter is activated at the rising of the level of the signal from, and the signal is modulated and transmitted by radio waves. On the receiving side, the radio receiver receives this radio wave, sends a signal to the adapter, guides it to the input / output line of the FAX from the adapter, inputs it to the FAX, and prints the document contents by the FAX. In this conventional FAX radio, FAXA and FAXB
One set of adapter and one set of wireless communication device will be interposed between and, but due to the nature and function of the wireless transmitter and receiver, the antenna will be used as a radio wave after receiving a transmission command (PTT, ON signal). From the receiver and the output of the demodulated signal from the receiver of the other party causes a time delay. This delay time is not constant due to the difference within the manufacturing specifications of wireless communication and aging. On the other hand, the signal output from the FAX includes a transmission command signal (PTT, ON) for controlling the communication device.
Signal) is not included, the threshold of the signal level sent from the FAX is detected, and this signal is used as the transmission command signal to the wireless communication device. Therefore, as shown in FIG. Not modulated. The modulation will be transmitted in a so-called state of dead. Also, due to the difference in the adjustment of the squelch sensitivity of the receiver of the other party, the signal is output with a delay of the response time of the squelch circuit from the time when the radio wave is received, so that the head is cut off by that amount. For these reasons, depending on the type of wireless communication device, the communication according to the program embedded in the FAX may not be performed. Therefore, the FAX considers that the line quality is poor, the communication speed is reduced, or the line is significantly defective. I was doing error handling.

[0003]

SUMMARY OF THE INVENTION The problem to be solved by the present invention is to solve these problems of the prior art, and to enable a FAX wireless communication which enables accurate communication without cutting off or cutting off the FAX communication contents. A method and a communication device are provided.

[0004]

Means for Solving the Problems The gist of the present invention which has solved the above problems is as follows: 1) Input a fax output signal to a radio transmitter to
In a FAX wireless communication method in which an output signal is modulated and transmitted on a radio wave, and a radio receiving unit at a remote place demodulates the radio wave and inputs it to a FAX, when the FAX signal is output on the transmitting side, the radio signal is first transmitted. Activate the transmitter,
FAX wireless communication method characterized by inputting a FAX signal to the wireless transmission unit after delaying by a time corresponding to the operation delay of the wireless transmission unit and the wireless reception unit 2) Outputting information such as documents and images as electric signals A FAX, a signal separation circuit that separates and outputs a transmission signal and a reception signal transmitted from the FAX, and a modulation and radio wave transmission circuit of the radio transmission unit when the level of the output signal of the signal separation circuit exceeds a set value. A transmission start circuit for starting, a signal delay circuit for passing the output signal of the signal separation circuit with a required time delay, and a transmission for stopping the circuit of the wireless transmission unit when the output level of the signal delay circuit drops below a predetermined value. A stop circuit, a wireless transmission unit that modulates the signal of the signal delay circuit to transmit a radio wave, and a wireless reception unit that receives and demodulates the radio wave and outputs a signal to the signal delay circuit In FAX radio communication apparatus according to claim.

[0005]

According to the present invention, when the document information signal separated from the signal separation circuit reaches a certain level or higher, the wireless transmission section which becomes the transmission start circuit is activated for the time being, and the signal is not sent to the wireless transmission section at the same time. The signal is delayed by the signal delay circuit (about the total of the delay time on the transmitting side and the delay time on the receiving side) and sent to the wireless transmission unit. Therefore, the wireless transmission unit and the wireless reception unit on the receiving side are activated first, so that the activated radio signal is transmitted to send a signal, and the modulated radio wave is transmitted and received and demodulated. Since the disconnection is also performed by detecting the decrease in the level of the output signal of the delay circuit, there is no tailing of the signal.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments will be described below with reference to the drawings. FIG. 1 is a block circuit diagram of a FAX wireless communication device according to an embodiment. In the figure, 1 is a fax, 2 is a signal separation circuit, 3 is a transmission start circuit, 4 is a signal delay circuit, 5 is a transmission stop circuit, 6 is a radio transmitter, 7 is the signal separation circuit 2, the transmission start circuit 3,
The signal transmission circuit 6, the signal delay circuit 4 and the transmission stop circuit 5 are integrated in one case, and the wireless transmission unit 6 includes a modulation circuit 9 and a radio wave transmission circuit 10. In addition, 11 is a wireless receiver,
It is a radio wave reception circuit 12 and a demodulation circuit 13. 8 is a missing number, 14 is an antenna, and 15 is a squelch circuit. In this embodiment, the FAX transmission signal of the FAX 1 (the signal at the point in FIG. 1a, signal A in FIG. 2) passes through the signal separation circuit 2 and is input to the transmission activation circuit 3. In the transmission activation circuit 3, when the signal level becomes equal to or higher than the set level, the modulation circuit 9 and the radio wave transmission circuit 10 are activated, and radio waves are emitted from the antenna 15. The output signal of the signal separation circuit 2 is input to the signal delay circuit 4, delayed by the required time, and output (signal B in FIG. 2). The delayed signal is input to the modulation circuit 9 of the wireless transmission unit 8, modulated and transmitted as a radio wave. When the signal from the signal delay circuit 4 becomes low level (falling of the signal E in FIG. 2), the output of the transmission stop circuit 5 decreases, and the FAX radio on the receiving side at a remote place that stops the operation of the wireless transmission unit 6 When the radio receiver 11 of the communication device receives a radio wave, the squelch circuit 16 operates (signal G), the demodulation circuit 13 demodulates the signal, and the output F
The AX signal passes through the signal separation circuit 2, is sent to the FAX, and is output as a document.

[0007]

As described above, according to the present invention, with the above-mentioned configuration, the carrier wave of the carrier is first transmitted on the FAX transmission side,
The FAX signal is delayed for the required time to be modulated and transmitted. Further, by stopping the radio wave after the delayed FAX signal disappears, it is possible to perform accurate FAX signal communication without the signal being cut off or cut off.

[Brief description of drawings]

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

FIG. 2 is an explanatory diagram showing signals at points a to h in the embodiment.

FIG. 3 is an explanatory diagram showing a conventional FAX wireless communication device.

FIG. 4 is an explanatory diagram showing a signal state of a conventional FAX wireless communication device.

[Explanation of symbols]

 1 FAX 2 signal separation circuit 3 transmission start circuit 4 signal delay circuit 5 transmission stop circuit 6 radio transmission section 7 adapter 8 9 modulation circuit 10 radio transmission circuit 11 radio reception section 12 radio reception circuit 13 demodulation circuit 14 antenna 15 squelch circuit

Claims (2)

[Claims] 1. A FAX output signal is input to a wireless transmission unit, a FAX output signal is modulated and transmitted on a radio wave, and when a wireless reception unit at a remote location receives the radio wave, the demodulation is performed and input to the FAX. In the FAX wireless communication method, when the FAX signal is output on the transmitting side, the wireless transmitting unit is first activated, and after delaying for a time corresponding to the operation delay of the wireless transmitting unit and the wireless receiving unit, the FAX signal is input to the wireless transmitting unit. A FAX wireless communication method comprising: 2. A FAX which outputs information such as a document and an image as an electric signal, a signal separation circuit which separates and outputs a transmission signal and a reception signal transmitted from the FAX, and a level of an output signal of the signal separation circuit. When the value exceeds a set value, a transmission start circuit that starts a circuit for modulating and transmitting a radio wave in the radio transmitter, a signal delay circuit that delays the output signal of the signal separation circuit for a required time and passes through, and an output of the signal delay circuit A transmission stop circuit that stops the circuit of the wireless transmission part when the level drops below a predetermined value, a wireless transmission part that modulates with the signal of the signal delay circuit and transmits a radio wave, and a signal delay circuit that receives and demodulates the radio wave A FAX wireless communication device comprising: a wireless receiving unit that outputs a signal.