JP2911640B2 - Data communication device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data communication device, and more particularly to a data communication device having a remote communication function in accordance with an instruction from a telephone.

[0002]

2. Description of the Related Art Conventionally, for example, a facsimile apparatus is known as this kind of apparatus. The operation of the facsimile apparatus having the remote reception function when the remote reception is performed is the same as the operation when the automatic reception is performed.

For example, when remote reception is performed,
When the automatic reception is performed, the operation when the user goes off-hook before detecting the significant signal from the partner device is the same. This behavior includes ignoring off-hook,
There are cases where reception continues. As another operation, when off-hook is detected, there is a case where the line is returned to the telephone and the telephone is in a call state.

[0004]

However, at the time of automatic reception, there are cases where the other party is talking and talking. For this reason, in the case of a telephone call, it is preferable to be in a call state by off-hook. Also, at the time of remote reception, since the operator has selected communication according to his / her intention to perform communication, it is preferable to continue communication regardless of the hook state. In particular, in the case of the off-hook state after the end of the operation for shifting to the remote reception, there is also a problem that the line returns to the telephone again after shifting to the reception once.

[0005]

According to the present invention, there is provided a mode for starting communication of a procedure signal for performing data communication in response to an operation of a telephone set by an operator, and performing data communication when an incoming call is detected. In a data communication device having a mode for automatically starting communication of a hand-received signal for, in accordance with a mode when communication of a procedure signal for performing data communication is started, a hook state of a telephone is ignored, or Data capable of performing communication by a telephone according to a hook state, and capable of performing communication by the telephone and data communication by the data communication unit by switching a communication line to a telephone or a data communication unit. In a communication device, an incoming call detecting means for detecting an incoming call, and a telephone call after the incoming call is detected by the incoming call detecting means. The remote communication mode for starting communication of a procedure signal for performing data communication when the operation is performed, and the communication of the procedure signal for performing data communication automatically when an incoming call is detected by the incoming call detection means. Switching means for switching an automatic communication mode to be started, hook state detecting means for detecting a hook state of a telephone, and when the communication of the procedure signal is started by the predetermined operation in the remote communication mode, the procedure is performed. After the communication of the signal is started, the data communication is executed regardless of the detection by the hook state detecting means, and when the communication of the procedure signal is started in the automatic communication mode, the data communication from the communication partner is performed. Until the procedure signal is detected, detection by the hook state detection means is performed, and in accordance with the detection by the hook state detection means, To provide a data communication apparatus characterized by comprising a control means for causing the communication by serial phone.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

FIG. 1 is a block diagram showing the configuration of the facsimile apparatus of the present embodiment.

In FIG. 1, reference numeral 2 denotes a telephone network used for data communication or the like, which is connected to a terminal of the line to control connection of a telephone switching network, switch to a data communication path, or perform a loop. Network control unit NCU that holds data
(Network Control Unit). The signal line 2a is a telephone line. The NCU 2 inputs the signal on the signal line 36a, and if the signal level is "0", connects the telephone line to the telephone side, that is, connects the signal line 2a to the signal line 2b. When the signal on the signal line 36a is input and the signal level is "1", the telephone line is connected to the facsimile apparatus side, that is, the signal line 2a is connected to the signal line 2c. In a normal state, the telephone line is connected to the telephone. When the call signal (CI signal) is not detected, a signal of signal level "0" is output to the signal line 2d, and when the call signal (CI signal) is detected, a signal of signal level "1" is output to the signal line 2d. .

Reference numeral 4 denotes a telephone. In the on-hook state, a signal of signal level "0" is output to the signal line 4a, and in the off-hook state, the signal level "1" is output to the signal line 4a.
The signal of is output.

Reference numeral 6 denotes a hybrid circuit for separating a transmission system signal and a reception system signal. That is, the transmission signal on the signal line 16a passes through the signal line 2c and is transmitted to the telephone line via the NCU 2. A signal sent from the other side passes through the NCU 2, then passes through the signal line 2 c, and passes through the signal line 6.
output to a.

Reference numeral 8 denotes a modulator for performing modulation based on the known CCITT recommendation V21. The modulator 8 includes a signal line 36
The procedure signal b is input, modulation is performed, and modulated data is output to the signal line 8a.

Reference numeral 9 transmits a CED signal to the signal line 9a when a CED signal transmission start pulse is generated on the signal line 36d. When the transmission of the CED signal ends, the CED 9 generates a CED signal transmission end pulse on the signal line 9b.

Reference numeral 10 denotes a reading circuit, which sequentially reads an image signal for one line in the main scanning direction from a transmission original, and outputs white and black 2
Create a signal sequence representing the values. CCD (charge coupled device)
Etc. and an optical system. The binarized signal example of white and black is output to the signal line 10a.

The read data 12 is input to the signal line 10a, and the encoded data (MH (Modified Huffman) coding or MR (Modified Read) coding) is output to the signal line 12a.

14 is a known CCITT recommendation V27te
This modulator performs modulation based on r (differential phase modulation) or V29 (quadrature modulation). The modulator 14 is the signal line 1
The signal 2a is input, modulation is performed, and modulated data is output to the signal line 14a.

Reference numeral 16 denotes an adder circuit which receives the signals on the signal lines 8a, 9a and 14a and outputs the added result to the signal line 16a.

Reference numeral 18 denotes a demodulator that performs demodulation based on the known CCITT recommendation V21. The demodulator 18 receives the signal on the signal line 6a, performs V21 demodulation, and outputs demodulated data to the signal line 18a.

Reference numeral 19 denotes a signal input to the signal line 6a,
The CNG signal detection circuit generates a CNG detection pulse on the signal line 19a when the G signal is detected.

20 is a known CCITT recommendation V27te
A demodulator that performs demodulation based on r (differential phase modulation) or V29 (quadrature modulation). The demodulator 20 receives the signal on the signal line 6a, performs demodulation, and outputs demodulated data to the signal line 20a.

The signal 22 receives the signal on the signal line 20a and outputs the decoded (MH (Modified Huffman) decoded or MR (Modified Read) decoded) data to the signal line 22a.

A recording circuit 24 receives the decoded data output to the signal line 22a and sequentially records white and black signals line by line.

26 is a speaker circuit. The speaker circuit 26 does not operate when the signal of the signal level "0" is output to the signal line 36c, and does not operate when the signal of the signal level "1" is output to the signal line 36c. Input and monitor the output signal.

Reference numeral 28 denotes a manual / automatic reception switching button. By pressing the button, the receiving state is switched. When the button is pressed, a pulse is generated on the signal line 28a.

Reference numeral 30 denotes a circuit for displaying a reception state.
When the power is on, the display indicates manual reception, and every time a pulse is generated on the signal line 28a, the automatic reception display and the manual reception display are repeated. When the manual reception is displayed, a signal of the signal level “0” is output to the signal line 30a, and when the automatic reception is displayed, the signal line 30a is output to the signal line 30a.
A signal of signal level "1" is output.

Reference numeral 31 denotes a remote reception type switching button. By pressing this button, the type of remote reception is switched. When the button is pressed, a pulse is generated on the signal line 32a.

Reference numeral 34 denotes a circuit for displaying the remote reception type. When the power is turned on, the on-hook type is displayed, and the display of the remote reception type is repeated as the hooking type and the on-hook type each time a pulse is generated on the signal line 32a. When the on-hook type is displayed, a signal of signal level "0" is output to the signal line 34a, and when the hooking type is displayed, a signal of signal level "1" is output to the signal line 34a.

Reference numeral 36 denotes a control circuit for performing the control described below, which comprises a microcomputer and peripheral devices such as a ROM and a RAM. When remote reception is selected, the CED signal is monitored to inform the operator of the transition to remote reception. After the transition to the remote reception, the reception operation is continued even if the user goes off-hook.
When automatic reception is selected, signals on the line are monitored until a significant signal from the partner device is detected. The monitor is turned off after detecting a significant signal from the partner device. If the user goes off-hook before detecting a significant signal from the partner device, the line returns to the telephone, and after detecting the significant signal from the partner device, the receiving operation continues even if the user goes off-hook.

There are two types of remote reception. When the on-hook type is selected, when the on-hook is performed within 15 seconds after the off-hook and the CNG signal is detected within 4 seconds after the on-hook, the process shifts to the remote reception. When the hooking type is selected, it shifts to remote reception only by hooking.

FIGS. 2 and 3 are flowcharts showing the control operation of the control circuit 36 of FIG.

In FIG. 2, step S40 represents the beginning. Here, the signal level “0” is applied to the signal line 36c.
Signal is output and the monitor is turned off.

In step S42, the signal line 36a
And outputs a signal of signal level "0" to turn off the CML.

In step S44, the signal of the signal line 2d is input, and it is determined whether or not a calling signal (CI signal) is detected. When the calling signal (CI signal) is detected, the process proceeds to step S48. , Calling signal (C
When the I signal has not been detected, the process proceeds to step S46 to execute other processing.

When the process proceeds from step S44 to step S48, a signal on the signal line 30a is input, and it is determined whether or not the mode is the manual incoming call mode. Time is Step S
Go to 50.

In step S50, the signal line 36a
To output a signal of signal level “0”, turn off the CML,
In step S52, a signal of signal level "1" is output to the signal line 36c, and the monitor is turned on. Then, in step S54, a pulse is generated on the signal line 36d, and the CED signal is transmitted.

In step S56, a pre-procedure of the facsimile communication procedure is executed.

In step S58, it is determined whether or not a significant signal from the partner device has been detected. If a significant signal from the partner device has been detected, the flow advances to step S62 to detect a significant signal from the partner device. If not, step S60
, The signal of the signal line 4a is input, and it is determined whether or not it is in an off-hook state. If it is in the off-hook state in step S60, the process proceeds to step S66, and if it is in the on-hook state, the process proceeds to step S56.

When the process proceeds from step S58 to step S62, a signal of signal level "0" is output to the signal line 36c,
The monitor is turned off, and in step S64, the remaining communication procedure and image communication are executed.

In step S66, the signal line 36c
Then, a signal of signal level "0" is output, the monitor is turned off, and a call is made in step S68.

When the process proceeds from step S48 to step S70 in the manual incoming call mode, the signal on the signal line 4a is input,
It is determined whether or not the vehicle is in the off-hook state. If the vehicle is in the off-hook state, the process proceeds to step S72. If the vehicle is in the on-hook state, the process proceeds to step S44.

In step S72, when the remote receiving operation is of the on-hook type, the system shifts to the remote receiving operation when on-hook within 15 seconds after the off-hook in response to the calling signal. This 15 seconds is stored in the timer REMT.

In step S74, 1 is set to Timer.
Stores seconds.

In steps S76, S78 and S80, it is determined whether or not the telephone is off-hook and no call signal is detected continuously for at least one second.
Proceed to step S82. If the on-hook is detected or the calling signal is detected within one second or longer, the process proceeds to step S44.

In step S82, the signal line 34a
Is received, and it is determined whether the remote reception is of the on-hook type or not. If it is the on-hook type, the process proceeds to step S84, and if it is the hooking type, the process proceeds to step S102.

In step S84, a signal on the signal line 4a is input, and it is determined whether or not on-hook has been performed. If on-hook has been performed, the process proceeds to step S86. In the off-hook state, there is a case of a call.

In step S86, the timer RE
It is determined whether or not the MT has timed out, that is, whether or not 15 seconds have elapsed since the hook was taken off.
Go to 44. If the timer REMT has not timed out, that is, if it is within 15 seconds after the off-hook, the process proceeds to step S88.

In step S87, a signal of signal level "1" is output to the signal line 36a, and the CML is turned on.

In step S88, C within 4 seconds
The timer Timer used for checking whether an NG signal is detected is set to 4 seconds.

In step S40, signal line 19a
Is input, it is determined whether or not a CNG signal is detected. When a CNG signal is detected, the process proceeds to step S94, and C
If no NG signal has been detected, the process proceeds to step S92.

In step S92, the timer Ti
It is determined whether or not the timer has timed out. If the timer Timer has timed out, the process proceeds to step S44, and if the timer has not timed out, the process proceeds to step S90.

In step S94, the signal line 36c
And outputs a signal of signal level "1", and turns on the monitor.

In step S96, a pulse is generated on the signal line 36d, and a CED signal is transmitted.

In step S98, the signal line 36c
And outputs a signal of signal level "0" to turn off the monitor.

Step S100 performs remote reception. In the remote reception here, the communication operation is executed without checking off-hook.

In step S102, the signal on the signal line 4a is input, and it is determined whether the hooking has been performed twice.
If hooking is performed twice, the process proceeds to step S106, and if not, the process proceeds to step S104.

In step S104, the signal on the signal line 4a is input, and it is determined whether or not on-hook is performed. If on-hook, the process proceeds to step S44. In the off-hook state, there is a case of a call.

In step S106, the signal line 36a
To output a signal of signal level "1", and turn on the CML.

Incidentally, the method for shifting to the remote reception is not limited to the hooking and on-hook type. Dial (DC impulse or DTMF)
Remote reception may be performed according to a method.

At the time of transition to remote reception, a signal indicating that fact may be sent to the child telephone instead of monitoring the CED signal.

The present invention can be applied not only to a facsimile apparatus but also to various data communication apparatuses such as a teletex, and various modifications are possible without being limited to the above-described embodiment.

[0060]

As described above, according to the present invention, when the communication of the procedure signal for performing the data communication is started by the remote operation, the data communication is executed regardless of the hook state of the telephone. Data communication can be performed reliably, and when communication of a procedure signal for performing data communication is automatically started, communication by the telephone is performed according to the hook state. Communication can be selected arbitrarily.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a facsimile apparatus of the present embodiment.

FIG. 2 is a flowchart showing a control operation of a control circuit 36 of FIG.

FIG. 3 is a flowchart showing a control operation of a control circuit 36 in FIG. 1;

[Explanation of symbols]

 2 NCU 4 Telephone 6 Hybrid circuit 8 V21 modulator 9 CED signal sending circuit 10 Reading circuit 12 Encoding circuit 14 V27ter or V29 modulator 16 Addition circuit 18 V21 demodulator 19 CNG detection circuit 20 V27ter or V29 demodulator 22 Decoding circuit 24 Recording Circuit 26 Speaker Circuit 28 Manual Reception / Automatic Reception Switching Button 30 Reception Status Display 32 Remote Reception Type Switching Button 34 Remote Reception Type Display 36 Control Circuit

Claims (2)

(57) [Claims] 1. A data communication device capable of switching a communication line to a telephone or a data communication unit to perform communication by the telephone and data communication by the data communication unit, When a predetermined operation is performed on the telephone after the incoming call is detected by the incoming call detecting means, data communication is performed.
A remote communication mode for starting communication of the procedure signal; and a data communication when an incoming call is detected by the incoming call detecting means.
Switching means for automatically switching an automatic communication mode for automatically starting communication of a procedure signal for performing ; hook state detecting means for detecting a hook state of a telephone; and performing the predetermined operation in the remote communication mode.
When the communication of the procedure signal is started, the communication of the procedure signal is started.
After the start of the communication of the signal, the data communication is executed irrespective of the detection by the hook state detecting means. When the communication of the procedure signal is started in the automatic communication mode , the communication phase is started.
Procedure signal for data communication from hand is detected
Until the hook state detection means
There, the data communication apparatus characterized by comprising a control means for causing the communication by the telephone set in response to detection by said hook state detection means. 2. The data communication device according to claim 1, wherein the predetermined operation on the telephone includes a hook operation of the telephone.