JP2615105B2 - Data transmission equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a data transmission device that performs data transmission by a telephone line or a wireless device.

[Prior Art] A facsimile apparatus is generally connected to a subscriber telephone line, and performs facsimile communication by wire. On the other hand, in recent years, a facsimile apparatus is connected to a wireless device, such as an in-vehicle facsimile apparatus, and wireless facsimile communication is often performed.

However, conventionally, facsimile apparatuses are separately manufactured for wired or wireless use, and cannot be shared for two uses.

Therefore, it is conceivable that one facsimile apparatus can be arbitrarily switched and used for the above two uses. However, in this case, it is necessary to switch between the wired side and the wireless side for use, and there is a problem that the operation is troublesome.

[Object] It is an object of the present invention to solve the above-mentioned problems, to provide a data transmission device which is easy to operate and can be shared for both wired and wireless use.

[Configuration] For this purpose, the present invention provides a wired interface circuit for transmitting and receiving a data signal input and output by a data processing unit through a telephone line, a wireless interface circuit for transmitting and receiving the data signal by a wireless device, A ringing detection circuit for detecting a ringing signal of the telephone and an off-hook detection circuit for detecting an off-hook state of a connected telephone are provided. When the telephone is off-hook, the operation is performed by a telephone line, and when the telephone is not off-hook, the operation is performed by a wireless device.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a circuit diagram of a facsimile apparatus according to an embodiment of the present invention. In FIG. 1, a facsimile apparatus 1 is connected to a telephone line, a telephone 2, a wireless transceiver 3 for a call, and a microphone 4 for transmitting a call.

The facsimile apparatus 1 includes an image information processing unit 11 for reading and recording an image, and a wired interface unit 1 corresponding to an NCU for transmitting and receiving various signals via a telephone line.
2, a wireless interface unit 13 for transmitting and receiving data signals by the wireless device 3, and a wired interface unit 12
Or a relay 14 for switching the wireless side interface unit 13
It is composed of

Line L1 of the telephone line through the off-hook detection circuit 12a, is connected to the common terminal c ₁ of the contact of the relay 12b, the break-side contact a ₁ is a ringing detection circuit 12c, is connected to one line of the telephone set 2 I have. Line L2 of the telephone line is connected to the common terminal c ₂ of relay 12b, the break-side contact a ₂ is connected to the other line of the telephone set 2.

The off-hook detection signal OF output from the off-hook detection circuit 12a is input to the system control unit 11a of the image information processing unit 11. Image information processing unit 11 enabled during wired communication
Is connected to one end of a winding of the relay 12b, and the other end of the winding is connected to the power supply Vc. The ringing detection signal RG output from the ringing detection circuit 12c is input to the system control unit 11a.

The make contact b ₁ and b ₂ of the relay 12b is connected to one winding of the transformer 12d for impedance matching. One end of the other winding is grounded, and the other end is
The relay 14 is connected to the contacts d ₁ and d ₂ . The common terminals f ₁ and f ₂ of the relay 14 are connected to the modem 11b of the image information processing unit 11.

One end of the winding of the relay 14 is connected to the power supply Vc, and the other end is connected to the line of the line switching signal LEX from the system control unit 11a. The contact e _{1 of the} relay 14 is
It is connected to one end of a. The other end of the variable resistor 13a is grounded, and its variable terminal is connected to the break-side contact g of the relay 13b. The common contact h of the relay 13b is connected to one end of one winding of the hybrid transformer 13c.

The center terminal of the winding is grounded, and the other end is connected to one end of the variable resistor 13d. The other end of the variable resistor 13d is grounded, and its variable terminal is connected to the filter circuit 13e. The output of the filter circuit 13e is connected to the contact point e ₂ of the relay 14 via the amplifier 13f.

One line of the microphone unit 41 in the microphone 4 is grounded, and the other line is connected to the contact i of the relay 13b. In addition, one end of the press talk switch 42 is grounded, and the other end is input to the relay drivers 13g and 13h. The output of the relay driver 13g is connected to one end of a winding of the relay 13b, and the other end of the winding is connected to the power supply Vc. The relay driver 13h forms a NOR circuit in which an input signal is inverted by two inputs, and a transmission instruction signal TR from the system control unit 11a is input to the other input.

The output of the relay driver 13h is connected to one end of a winding of the relay 13i, and the other end of the winding is connected to the power supply Vc. The make-side contact j of the relay 13i is connected to the center terminal of the other winding of the hybrid transformer 13c and to the ground line on the radio 3 side.

One end of the winding of the hybrid transformer 13c is connected to a transmission circuit 31 in the wireless device 3, and the other end is connected to a reception circuit.
Connected to 32. The contact k of the relay 13i is connected to the transmission / reception switching circuit 33. Receiving circuit in radio 3
A speaker 34 for receiving a call is connected to 32.

FIG. 2 is a block diagram of the image information processing unit 11. As shown in FIG. In the figure, a system control unit 11a is configured by a microcomputer system and controls each unit in the facsimile apparatus 1 to execute a predetermined image / image information transmission / reception operation.

The modem 11b modulates and demodulates the image information and transmits it.
It transmits various procedure signals in the transmission control procedure.

The scanner 11c reads a document image and extracts image information of a predetermined resolution, and the plotter 11d records the image information on a recording sheet.

The encoding / decoding unit 11e encodes image information to be transmitted and decodes received image information. The operation display unit 11f displays operation guidance and the like, and performs various operations for causing the facsimile apparatus to execute predetermined transmission / reception processing according to the guidance.

With the above configuration, FIG. 3 shows an operation when the facsimile machine 1 is operated to start or transmit an image.

Now, assuming that image transmission / reception is performed by the wireless device 3, an operator calls a partner station by a predetermined operation of the wireless device 3.

In the standby state of the facsimile machine 1, the image information processing unit 11
Is at the "H" level. When the press talk switch 42 is not depressed, the contact is open, so the relay 13i
Is off. As a result, the contact signal to the transmission / reception switching circuit 33 is also turned off.
The speaker 34 can receive voice from the partner station.

When the press talk switch 42 is pressed, the relay
13i is turned on, a contact signal to the transmission / reception switching circuit 33 is turned on, the radio device 3 enters a transmission state, and the relay 13b
It is turned on by being driven by the relay driver 13g. As a result, the audio signal from the microphone unit 41 is
The signal is input to the transmission circuit 31 via the contact and the hybrid transformer 13c and can be transmitted from the microphone 4 to the partner station.

In this state, the operator of the facsimile machine 1 negotiates with the operator at the opposite station, and then performs a predetermined setting operation on the facsimile machine 1 to activate the facsimile machine 1.

When the facsimile machine 1 is started (process 51), it determines whether or not the telephone 2 is in an off-hook state based on the off-hook detection signal OF (process 52). In this case, since the telephone 2 is not used and is on-hook (N in process 52), the line switching signal NEX from the system control unit 11a is set to "H".
Level, that is, off state. This allows the relay 14
Are connected to the e ₁ and e ₂ sides (process 53).

The image information processing unit 11 transmits or receives image information while transmitting and receiving various signals to and from the partner station. The transmission instruction signal TR is set to “H” level during the period of receiving various signals. It becomes “L” level during the transmission period.

Now, assuming that the transmission instruction signal TR has become “H”, the wireless device 3 enters the reception state as described above. At this time, the signal from the partner station received by the receiving circuit 32 is transmitted to the hybrid transformer 13c, the variable resistor 13d,
e, via the amplifier 13f, and the relay 14, are input to the modem 11b as a reception signal RD.

Next, assuming that the transmission instruction signal TR becomes "L", the relay 13i is turned on, and the wireless device 3 enters a transmission state. At this time, the transmission signal TD output from the modem 11b is
4, variable resistor 13a, relay 13b, hybrid transformer 13c
Is input to the transmission circuit 31 and transmitted to the partner station.

Various signals are exchanged based on the reception signal RD and the transmission signal TD, and image information transmission or reception processing is executed (processing 54).

Next, assuming that images are transmitted and received via a telephone line, the operator dials the telephone number of the other party using the microphone 4 to call the Sakae station.

When the partner station operator responds, the operator decides on which one to transmit from, and then performs a predetermined setting operation on the facsimile machine 1 to activate the facsimile machine 1.

When the facsimile machine 1 is activated (process 51), it is determined that the handset is off-hook because the handset is currently raised (Y in process 52). In this case, both the line switching signal NEX and the switching signal TEX become “L”. Thereby, the contacts of the relay 14 are connected to the d ₁ and d ₂ sides,
With the relay 12b, the lines L1 and L2 of the telephone line
The connection is made to the 12d side (processing 55).

As a result, a signal from the partner station received from the telephone line is input to the modem 11b as the received signal RD via the relay 12b, the transformer 12d, and the relay 14. Also, modem 11b
Is transmitted to the telephone line through the reverse route. In this way, the transmission or reception processing of the image information is executed (processing 56).

On the other hand, the incoming call to the telephone line is determined by the ringing detection signal RG as shown in FIG. 4 (process 61). Now
If it is called from the partner station and an incoming call is received (Y in step 61), the relay 14 is switched to the telephone line side as in step 55, and the telephone line is connected to the transformer 12d by the relay 12b (step 62). Next, a predetermined transmission / reception process is executed in the same manner as the process 56 (process 63).

As described above, according to the present embodiment, the facsimile apparatus 1 is provided with the wired interface unit 12 and the wireless interface unit 13, so that one apparatus can be used for both wired and wireless use. Become like

When the telephone is activated, it is determined whether the telephone is off-hook or not on a wired side or a wireless side, and a predetermined transmitting / receiving operation is performed. When an incoming call arrives on the telephone line, the call is switched to the wired side so that an incoming call is automatically received.

Thereby, the operator does not need to perform the troublesome operation of switching between the wired side and the wireless side before the operation of the facsimile machine 1 starts, and thus the operation is simplified.

Although the facsimile apparatus has been described in the practical example, it is obvious that the present invention can be similarly applied to various data transmission apparatuses having a built-in modem and transmitting data over a telephone line.

[Effects] As described above, according to the present invention, since the interface circuits for transmitting and receiving data signals are respectively provided by the telephone line and the wireless device, one data transmission device can be used for wired and wireless. On the other hand, it becomes possible to share a call signal from the telephone line and an off-hook state of the telephone, so that when the telephone line is received, or when the telephone is off-hook due to a start-up operation, the telephone line can be used. When the data signal is transmitted and received, the start operation is performed, and the telephone is not off-hook, the data signal is transmitted and received on the wireless device side. Therefore, the operator switches between the wired side and the wireless side before the operation of the device starts. The operation becomes simpler because it becomes unnecessary.

[Brief description of the drawings]

FIG. 1 is a circuit configuration diagram of a facsimile apparatus according to an embodiment of the present invention, FIG. 2 is a block configuration diagram of an image information processing unit, FIG. 3 is an operation flowchart showing transmission / reception processing at the time of starting operation, and FIG. Is an operation flowchart showing transmission / reception processing when a call arrives at a telephone line. DESCRIPTION OF SYMBOLS 1 ... Facsimile apparatus, 2 ... Telephone, 3 ... Radio, 4 ... Microphone, 11 ... Image information processing part, 11a ... System control part, 11b ... Modem, 11c ... Scanner, 11d ...
... Plotter, 11e ... Encoding / decoding unit, 12 ... Wired-side interface unit, 12a ... Off-hook detection circuit, 12b, 13
b, 13i, 14 …… Relay, 12c …… Ringing detection circuit, 12d
…… Transformer, 13… Wireless interface unit, 13a, 13
d …… variable resistance, 13c …… hybrid transformer, 13e
…… Filter circuit, 13f …… Amplifier, 13g, 13h …… Relay driver, 31 …… Transmit circuit, 32 …… Receiver circuit, 33 …… Transmit / receive switching circuit, 34 …… Speaker, 41 …… Mic unit,
42 ... Press talk switch.

Claims (1)

(57) [Claims] A data processing unit for inputting and outputting a data signal;
A telephone line and a telephone are connected, a wired interface circuit for transmitting and receiving the data signal by the telephone line, a ringing detection circuit for detecting a call signal from the telephone line, and an off-hook detection for detecting an off-hook state of the telephone. Circuit, a wireless device connected thereto, a wireless interface circuit for transmitting and receiving the data signal by the wireless device, and a wired / wireless switching circuit for switching between transmitting and receiving the data signal via the telephone line or the wireless device And when a call is received on the telephone line, or when the phone is activated and the telephone is in an off-hook state,
Control means for executing transmission / reception of the data signal by the telephone line, and when the telephone is not in an off-hook state when the telephone is not in an off-hook state, control means for executing transmission / reception of the data signal by a wireless device. Transmission equipment.