JPH052028B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a wireless facsimile interface.

``Problems to be solved by conventional technology and inventions'' In recent years, facsimile, a wireless communication system, has been developed. This facsimile is a combination of a wireless facsimile and a dedicated radio.

On the other hand, high-performance wireless communication devices are available on the market, and there is a demand for using these communication wireless devices in place of the dedicated wireless devices described above.

The present invention seeks to satisfy such needs.

"Means for Solving Problems" The present invention is configured to electrically intervene between the input/output terminal of a wireless facsimile and the microphone connection terminal of a telephone radio, and is equipped with a microphone. In the internal circuit, an input/output level adjustment means is provided, the voice transmission means using the microphone is adjusted, and a facsimile communication priority means is provided.

``Function'' With the above configuration, commonly used communication radios can be used as they are, and easy connection using existing terminals is possible.

It is also possible to make normal calls using the microphone, and to receive calls using the built-in speaker of the communication radio, but if this call and facsimile communication are made at the same time, the call will be interrupted. It is invalidated and facsimile communication takes priority.

"Example" The drawings illustrate embodiments of the invention.

In FIG. 1, 1 is an existing wireless facsimile, 2 is an existing telephone radio, and 3 is an interface according to the present invention which is electrically interposed between the two. 4 is an external microphone equipped with the interface, and has a push button 41 for transmitting a call.

The interface 3 has one end connected to the transmission data output terminal, reception data input terminal, and transmission instruction signal output terminal of the wireless facsimile 1, and the other end connected to the microphone jack 21 of the communication radio 2.
They are connected by connection cords 5 and 6, respectively.
The microphone jack 21 is equipped with an input terminal for audio signals for sending and receiving calls, an output terminal, and an input/output switching terminal. Note that a microphone for both sending and receiving calls is usually connected to the microphone jack 21, and has a push button for sending and receiving calls.
The microphone is normally in the receiving mode and can be switched to the transmitting mode by pressing a button, but the interface 3 is connected in place of this microphone.

Further, as shown in FIG. 2, the interface 3 includes three lines leading from one end to the other, namely, a transmission data line TXD, a reception data line RXD, and a transmission instruction line TXI. .

The transmission data line TXD runs from the transmission data output terminal of the wireless facsimile 1 to the audio signal input terminal of the communication radio 2.
A fax input level adjustment circuit 31 is provided in the middle. Further, the configuration is such that the audio signal from the microphone 4 is supplied to the output side of the fax input level adjustment circuit through the break contact of the microphone switching relay 34.

The reception data line RXD is connected from the audio signal output terminal of the communication radio 2 to the radio facsimile 1.
It leads to the receive data input terminal of
An input level adjustment circuit 35, a high-pass filter 36, and an amplifier circuit 37 are sequentially provided on the way.

The transmission instruction line TXI receives a radio transmission instruction circuit 32 whose output end leads to the input/output switching terminal of the communication radio 2, and the radio transmission instruction circuit 32
It is activated by the output from the transmission instruction signal output terminal of the wireless facsimile 1 and by the push button 41 for transmitting a call. Note that the radio transmission instruction circuit 32 is configured to output a low-level radio transmission instruction signal when the input becomes low level. In FIG. 2, 38 and 39 are backflow prevention diodes.

In addition, a relay drive circuit 33 is connected to the transmission instruction line TXI on the side of the wireless facsimile 1, and the relay drive circuit causes the microphone switching relay 34 to
I'm trying to control it. That is, the transmission instruction signal of the wireless facsimile 1 is used to cut off the break contact of the microphone switching relay 34, thereby disabling the telephone call and giving priority to the facsimile communication.

With the above configuration, wireless facsimile 1
The transmitted data is adjusted to a predetermined level by a fax input level adjustment circuit 31, supplied to the communication radio 2, and transmitted as radio waves through the antenna 22. At this time, the transmission instruction signal from the radio facsimile is transmitted to the radio transmission instruction circuit 32.
is activated, and the radio transmission instruction circuit controls the telephone radio 2 to be in a transmission mode.At the same time, the relay drive circuit 33 is activated, and the relay drive circuit shuts off the microphone switching relay 34, giving priority to facsimile communication. let

Next, incoming radio waves for facsimile communication are received by the communication radio 2 through the antenna 22, and after the level of the received data signal is adjusted by the input level adjustment circuit 35, only the required signal is extracted by the bypass filter 36 and amplified. It is amplified by the circuit 37,
The data is supplied to the wireless facsimile 1.

By the way, it is also possible to make a call other than during facsimile communication, and in that case, you can send a call by pressing the send button 41 on the microphone 4, and you can also receive a call using the built-in speaker of the call radio 2. is possible.

"Effects of the Invention" According to the present invention, it is possible to use a telephone radio device commonly used in radio facsimile machines as is, and the connection is extremely simple using the telephone microphone connection terminal of the telephone radio device. It's easy to do.

Furthermore, it is possible to make telephone calls, and when a telephone call and a facsimile communication overlap, the facsimile communication is given priority, and the facsimile communication is not interfered with, which is extremely convenient for use.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, with FIG. 1 being an explanatory diagram of the configuration, and FIG. 2 being a block diagram of the main parts. 1...Radio facsimile, 2...Communication radio,
3...Interface, 4...Microphone, 5,
6...Connection cord, 21...Microphone jack, 22...Antenna.

Claims (1)

[Claims] 1 It has a microphone for transmitting calls and a transmission instruction means for instructing transmission, and is switched from a standby reception state to a transmission state by an instruction from the transmission instruction means, and receives input from the microphone. an interface connected between a communication radio that transmits voice data and a facsimile device having a transmitting and receiving function, the interface adjusting the level of data output from the facsimile device to the communication radio; means for adjusting the level of data output from the communication radio to the facsimile device; A wireless facsimile device comprising: means for instructing a telephone radio to transmit; and means for disabling the transmission of voice data input from the microphone when a transmission instruction is received from the facsimile device. interface.