JPH0588012B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a wireless communication device that can be used for both telephone calls and data communication.

[Prior Art] When communicating data between a computer and various terminal devices, including a facsimile device, data communication is performed using voice band signals via a modem. Therefore, it is conceivable to use a wireless device for telephone calls for both normal telephone calls and data communication as described above. However, in this case, if you use a switch to switch between calls and data communication, the switching operation will be double-ended, and if you accidentally switch to the calling side while data communication is in progress, the data communication will be interrupted. become.

As described above, in the past, there was a problem in that it was difficult to switch between telephone calls and data communications.

[Objective] An object of the present invention is to solve the above-mentioned problems and provide a wireless communication device that allows easy switching between telephone calls and data communication.

[Configuration] For this reason, the present invention is such that the telephone radio device is always in a receiving state, and the received signal is received by a speaker, and the received signal is input to a data communication device to receive data, and the transmitting switch is operated. Then, the wireless device is switched to a transmitting state so that a voice can be transmitted from the microphone, and when the data communication device is switched to a transmitting state, the wireless device is switched to a transmitting state so that data can be transmitted. The operation of the transmitting switch is disabled while the data is being received, and the transmission from the microphone is disabled while the data is being transmitted.

Examples of the present invention will be described in detail below.

FIG. 1 is a configuration diagram of a wireless communication device according to an embodiment of the present invention. In the figure, a radio device 2 to which an antenna 1 is connected is connected to an interface device 3 via a connection cord 4.
is connected to a facsimile device 5 by a connection cord 6. In addition, the interface device 3 includes
A microphone stand 9 is connected to which a microphone 7 and a transmitter switch 8, which is a push button switch, are attached. The radio device 2 has a built-in speaker and communicates by switching between a transmitting state and a receiving state.If the microphone stand 9 is connected directly without going through the interface device 3, the radio device 2 is a general telephone radio that allows normal telephone calls. It is a machine.

FIG. 2 shows a block diagram of the interface device 3. In the figure, the facsimile device 5 is
It includes a reception terminal RX that inputs a reception data signal, a transmission terminal TX that outputs a transmission data signal, and a transmission instruction terminal TI that outputs a signal indicating the transmission state. The received data signal and the transmitted data signal are voice band signals modulated using a predetermined modulation method.

The level adjustment circuit 3a is the audio output terminal of the radio 2.
Adjust the audio signal from the SP to a predetermined signal level,
The high-pass filter 3b removes noise components such as hum from the signal, and the amplifier circuit 3c amplifies the signal and
This is what you input. In addition, the carrier wave detection circuit 3
d detects the carrier wave component of the signal.

The level adjustment circuit 3e inputs the output signal from the transmission terminal TX of the facsimile device 5, adjusts it to a predetermined signal level, and inputs it to the microphone terminal MC of the radio device 2. The relay drive circuit 3f receives a transmission instruction signal from the transmission instruction terminal TI of the facsimile device 5 and drives the relay contact 3g. Further, the relay drive circuit 3h drives the relay contact 3i according to the detection result of the carrier wave detection circuit 3d.

The diodes 3j and 3k form an OR circuit for activating the transmission instruction circuit 3l with either of the two signals. This transmission instruction circuit 3l
The output signal is input to the transmission instruction terminal TK of the radio 2.

The wireless communication device of this embodiment has the above configuration, and when the facsimile device 5 is in a standby state in which it is not transmitting or receiving, the output signal from the transmission instruction terminal TI is at the “H” level, and the output signal from the transmission terminal TX is at the “H” level. The output signal of is off.

At this time, the relay drive circuit 3f is connected to the relay contact 3
g is held on the a side as shown in the figure, and the line of the microphone 7 is connected to the microphone terminal MC of the radio device 2. In addition, the relay drive circuit 3h has a relay contact 3i.
Hold it on the a side as shown in the figure, and turn the transmitter switch 8.
The line is connected to the diode 3k.

Here, when the push button of the transmitting switch 8 is pressed, the input of the transmission instruction circuit 3l is changed to the diode 3k.
It becomes grounded through. Transmission instruction circuit 3
1 thereby turns on the transmission instruction signal to the transmission instruction terminal TK of the radio 2. This transmission instruction signal is a control signal that sets the radio device 2 to a receiving state when it is off, and sets it to a transmitting state when it is on.

Therefore, a message spoken into the microphone 7 while pressing the push button of the transmitter switch 8 is transmitted by the radio 2 to the other radio station. On the other hand, when the push button is reset, the radio device 2 enters the receiving state, and the message received from the partner radio station is output from the speaker 2a. In this way, when the facsimile device 5 is not operating, wireless communication can be performed as in the conventional case.

On the other hand, facsimile communication by the facsimile device 5 is executed according to the procedure shown in FIG.
In other words, the call from the other wireless station is transmitted to speaker 2.
a and confirm that the other party's wireless station is requesting facsimile communication through a conversation similar to the conventional one. Next, the receive button on the facsimile device 5 is pressed.

As a result, the facsimile device 5 transmits data to the transmission terminal according to the predetermined transmission procedure as shown in FIG.
Outputs CED signal and DIS signal from TX. Also,
At the same time as this signal is output, the transmission instruction terminal TI becomes “L”
Outputs a level signal. The level adjustment circuit 3e inputs the CED signal and the DIS signal, adjusts them to a predetermined signal level, and inputs them to the microphone terminal MC of the radio 2. Further, the "L" level signal of the transmission instruction terminal TI is input to the transmission instruction circuit 3l through the diode 3j. When the transmission instruction circuit 3l receives the above-mentioned "L" level signal, it turns on the transmission instruction signal to the transmission instruction terminal TK of the radio 2 in the same manner as described above. As a result, the CED signal and DIS signal are sequentially transmitted to the partner wireless station.

At this time, the relay drive circuit 3f inputs the "L" level output signal from the transmission instruction terminal TI,
Relay contact 3g is switched to the b side. Therefore, the line of the microphone 7 is opened at the relay contact 3g, and noise and voice entering the microphone 7 are prevented from being transmitted together with the above-mentioned signal.

On the other hand, when the partner wireless station receives the CED signal and DIS signal, it transmits a DCS signal and a modem training signal to the wireless station. The radio device 2 receives this signal and outputs it from the audio output terminal SP.
This signal is input to the level adjustment circuit 3a, and the signal level is adjusted to a predetermined constant level.
The level-adjusted signal is passed through the high-pass filter 3.
At step b, low-frequency noise components are removed, and further amplified by the amplifier circuit 3c, and sent to the facsimile device 5.
It is input to the receiving terminal RX of. When the facsimile device 5 receives the above signal, it executes a predetermined transmission control operation.

The carrier wave detection circuit 3d monitors the above signal, and turns on the carrier detection signal CD when detecting the carrier wave of the transmission signal, that is, when receiving some kind of facsimile signal. When the carrier detection signal CD is turned on, the relay drive circuit 3h switches the relay contact 3i to the b side. As a result, the line of the transmitter switch 8 is opened at the relay contact 3i, so that the operation of the transmitter switch 8 is disabled.
Therefore, it is possible to prevent the wireless device 2 from switching to the transmitting state by accidentally pressing the transmitter switch 8 while receiving a facsimile signal as described above.

Thereafter, the facsimile device 5 repeats the above-described transmission and reception according to the procedure shown in FIG. 3, and executes a predetermined facsimile communication.

At this time, as described above, while the facsimile signal is being received, the transmitter switch 8 is disabled, and while the facsimile signal is being transmitted, the voice input to the microphone 7 is controlled not to be transmitted.

When the facsimile communication is completed, the carrier detection signal CD is turned off, the output signal of the transmission instruction terminal TI becomes "H" level, and wireless communication can be carried out freely as described above.

As described above, in this embodiment, the wireless device 2 for communication
When used for both telephone calls and data communications, the transmitter switch 8 is disabled while receiving a facsimile signal, and the microphone 7 is controlled so as not to transmit audio while transmitting a facsimile signal. As a result, switching between a call and data can be performed by simply pressing a push button when speaking during a call, while preventing data communication from being interrupted by pressing the push button.

In this embodiment, the carrier wave detection circuit 3d is provided to detect the reception state of data, but instead of this, a circuit for detecting the reception state is provided inside the facsimile device 5, and a signal indicating the reception state is provided. may be taken out from the terminal TRC and input to the relay drive circuit 3h.

Furthermore, in this embodiment, as a data communication device,
Although a facsimile device is shown as an example, the present invention can be similarly applied by connecting and disposing a modem to various terminal devices such as computers, printers, and scanners. At this time, in order to switch the transmission/reception state of the radio device 2, a transmission instruction terminal outputs an "L" level signal during data transmission, as in the present embodiment.
Set up a TI.

[Effects] As described above, according to the present invention, when a telephone radio device is used for both telephone calls and data communication, the transmit button and microphone for telephone calls are disabled during data transmission, so that the transmit button and microphone for telephone calls are disabled. Switching between data communication and data communication becomes easier, and stable communication becomes possible.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a wireless communication device according to an embodiment of the present invention, FIG. 2 is a block diagram of an interface device, and FIG. 3 is an explanatory diagram of a transmission procedure of a facsimile device. 1...Antenna, 2...Radio device, 2a...Speaker,
3...Interface device, 3a, 3e...Level adjustment circuit, 3b...High pass filter, 3c...Amplification circuit, 3d...Carrier detection circuit, 3f, 3h...Relay drive circuit, 3g, 3i...Relay contact, 3j, 3k
...Diode, 3l... Transmission instruction circuit, 4, 6... Connection cord, 5... Facsimile device, 7... Microphone,
8... Transmission switch, 9... Microphone stand.

Claims (1)

[Claims] 1. A wireless receiving unit that inputs received radio waves and extracts a received audio signal, a speaker that outputs the received audio signal, a data receiving unit that extracts received data from the received audio signal, and a microphone that converts audio into a transmitted audio signal. , a data transmission section that converts transmission data into a voice band data signal, a radio transmission section that modulates the transmission audio signal and the data signal and outputs a transmission radio wave, and the radio transmission section and the radio reception section. a transmission switch that switches the operation and operates when transmitting; a reception detection means that detects when the data reception section is in operation; a transmission detection means that detects when the data transmission section is transmitting; It is characterized by comprising an operation disabling means for disabling the operation of the switch, and a transmitting disabling means for disabling the audio signal transmitted by the microphone when the data is being transmitted, thereby facilitating switching between telephone calls and data communication. wireless communication equipment.