JPH04357754A - Data communication equipment - Google Patents

Abstract

PURPOSE:To implement talking and data communication optionally by implementing data communication regardless of detection of hook state at remote communication and implementing talking according to the detection of the hook state at automatic communication. CONSTITUTION:A network control unit 2 inputs a signal from a signal line 36a, and when the signal level is 0, a telephone line is connected to a telephone set side, that is, a signal line 2a is connected to a signal line 2b. Moreover, when the signal of the signal line 36a is inputted and the signal level is at 1, the telephone line is connected to the facsimile equipment side, that is, the signal line 2a is connected to a signal line 2c. In this case, when the facsimile equipment makes automatic reception to an incoming call, the off-hook of a telephone set 4 is detected till a CNG detection circuit 19 detects a CNG signal, the talking by the telephone set 4 is transited and when the remote reception is implemented by a command from the telephone set 4 on the other hand, then the facsimile reception is implemented regardless of the hook state of the telephone set 4.

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 based on instructions from a telephone.

0002

2. Description of the Related Art Conventionally, facsimile machines, for example, have been known as devices of this type. A facsimile machine having a remote reception function operates in the same way when remote reception is performed and when automatic reception is performed.

[0003] For example, when remote reception is performed,
and when automatic reception is performed, the operations are the same when going off-hook before detecting a significant signal from the other party's device. This behavior ignores off-hook,
There are cases where reception continues. Another operation is when an off-hook condition is detected, the line is returned to the telephone side and a conversation is established.

0004

[Problem to be Solved by the Invention] However, during automatic reception, there are cases in which the other party's device is talking and cases in which the other party is communicating. For this reason, in the case of a telephone call, it is preferable to enter the telephone conversation state by going off-hook. Further, during remote reception, since the operator selects communication based on his/her intention to communicate, it is preferable to continue communication regardless of the hook state. In particular, in the case of an off-hook state after the operation for switching to remote reception is completed, a problem occurs in that the line returns to the telephone side again after switching to reception.

[0005]

[Means and effects for solving the problems] In the present invention, when communicating by remote communication means, data communication is performed regardless of the hook state detection of the telephone by the detection means, and when communicating by automatic communication means, data communication is performed according to the hook state detection of the telephone. It is equipped with means for making calls or data communications. As a result, data communication can be reliably performed during remote communication, and moreover, call and data communication can be arbitrarily selected during automatic communication.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained in detail below based on embodiments shown in the drawings.

FIG. 1 is a block diagram showing the configuration of a facsimile apparatus according to this embodiment.

In FIG. 1, since the telephone network is used for data communication etc., 2 is connected to the terminal of the line to control the connection of the telephone exchange network, switch to a data communication path, and connect the loop. The network control unit NCU (
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. Further, a signal on the signal line 36a is input, and if the signal level is "1", the telephone line is connected to the facsimile machine side, that is, the signal line 2a is connected to the signal line 2c. Under normal conditions, the telephone line is connected to the telephone side. When a calling signal (CI signal) is not detected, a signal with a signal level of "0" is output to the signal line 2d, and when a calling signal (CI signal) is detected, a signal with a signal level of "1" is output to the signal line 2d. .

[0009] 4 is a telephone. In the on-hook state, a signal with a signal level of "0" is output to the signal line 4a, and in the off-hook state, a signal level of "1" is output to the signal line 4a.
Outputs the signal.

Reference numeral 6 denotes a hybrid circuit that separates transmitting system signals and receiving system signals. That is, the transmission signal on the signal line 16a passes through the signal line 2c and is sent out to the telephone line via the NCU 2. In addition, the signal sent from the other party passes through the NCU 2, then passes through the signal line 2c, and then passes through the signal line 6a.
is output to.

Reference numeral 8 denotes a modulator that performs modulation based on the known CCITT recommendation V21. The modulator 8 is connected to the signal line 36
The procedure signal b is input, modulation is performed, and the 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. Then, when the transmission of the CED signal is completed, 9 generates a CED signal transmission end pulse on the signal line 9b.

Reference numeral 10 denotes a reading circuit, which sequentially reads image signals for one line in the main scanning direction from the transmitted original, and reads two lines of white and black image signals.
Create a signal sequence that represents a value. CCD (charge coupled device)
It consists of an image sensor and an optical system. The white and black binary signal example is output to the signal line 10a.

Reference numeral 12 inputs the read data outputted to the signal line 10a, and outputs encoded data (MH (Modified Huffman) encoding or MR (Modified Read) encoding) to the signal line 12a.

[0015] 14 is the well-known CCITT recommendation V27te.
This is a modulator that performs modulation based on r (differential phase modulation) or V29 (quadrature modulation). Modulator 14 is connected to signal line 1
2a is input, modulation is performed, and the modulated data is output to the signal line 14a.

Reference numeral 16 denotes an adder circuit that inputs the signals of the signal line 8a, the signal line 9a, and the signal line 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 inputs the signal on the signal line 6a, performs V21 demodulation, and outputs demodulated data to the signal line 18a.

19 inputs the signal of the signal line 6a, and CN
This is a CNG signal detection circuit that generates a CNG detection pulse on the signal line 19a when a G signal is detected.

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

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

A recording circuit 24 inputs the decoded data outputted 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 a signal of signal level "0" is output to the signal line 36c, and does not operate anything when a signal of signal level "1" is output to the signal line 36c. Input and monitor the output signal.

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

30 is a circuit that displays the reception status. When the power is on, manual reception is displayed, and the automatic reception display and manual reception display are repeated every time a pulse is generated on the signal line 28a. When manual reception is displayed, a signal of signal level "0" is output to the signal line 30a,
When automatic reception is displayed, a signal with a signal level of "1" is output to the signal line 30a.

31 is 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.

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

Reference numeral 36 denotes a control circuit that performs the control described below, and is composed of a microcomputer and peripheral devices such as ROM and RAM. When remote reception is selected, the CED signal is monitored to notify the operator of the transition to remote reception. After shifting to remote reception, the reception operation continues even if off-hook. Furthermore, when automatic reception is selected, signals on the line are monitored until a significant signal is detected from the other party's device. After detecting a significant signal from the other party's machine, turn off the monitor. Further, if the telephone goes off-hook before detecting a significant signal from the other party's device, the line returns to the telephone side, and after detecting a significant signal from the other party's device, the receiving operation continues even if the telephone goes off-hook.

Furthermore, there are two types of remote reception. When on-hook type is selected, on-hook within 15 seconds after off-hook, and 4 seconds after on-hook.
If a CNG signal is detected within seconds, it will shift to remote reception. When hooking type is selected,
Shift to remote reception by hooking only.

FIGS. 2 and 3 are flowcharts showing the control operation of the control circuit 36 in FIG. 1.

In FIG. 2, step S40 represents the beginning. Here, the signal level "0" is applied to the signal line 36c.
outputs the signal and turns off the monitor.

In step S42, the signal line 36a
A signal with a signal level of "0" is output to turn off the CML.

In step S44, the signal on the signal line 2d is input, and it is determined whether or not a calling signal (CI signal) is detected. If the calling signal (CI signal) is detected, the process advances to step S48. , call signal (C
I signal) is not detected, the process advances to step S46 and other processing is executed.

Further, when the process advances from step S44 to step S48, the signal on the signal line 30a is input, and it is determined whether or not the manual call receiving mode is set. If the manual call receiving mode is selected, the process proceeds to step S70, and the automatic call receiving mode is set. Time is step S
Go to 50.

In step S50, the signal line 36a
Outputs a signal with signal level “0” to turn off CML,
In step S52, the signal level "
1" signal and turn on the monitor. Then, in step S54, a pulse is generated on the signal line 36d,
Sends the CED signal.

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

[0036] In step S58, it is determined whether or not a significant signal from the other party's machine has been detected. If a significant signal from the other party's machine is detected, the process proceeds to step S62, where a significant signal from the other party's machine has been detected. If not, step S60
At , the signal on the signal line 4a is input, and it is determined whether or not the off-hook state is present. If the off-hook state is found in step S60, the process proceeds to step S66, and if the on-hook state is found, the process proceeds to step S56.

When the process advances 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 procedures and image communication are executed.

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

Further, when the process advances from step S48 to step S70 in the manual call reception mode, the signal on the signal line 4a is input,
It is determined whether or not the device is in an off-hook state, and if it is an off-hook state, the process proceeds to step S72, and if it is an on-hook state, the process proceeds to step S44.

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

[0041] Also, in step S74, 1 is set to Timer.
Stores seconds.

[0042] In steps S76, S78, and S80, it is determined whether or not the telephone has been off-hook continuously for one second or more and no calling signal has been detected, and if the conditions are satisfied,
The process advances to step S82. If on-hook or a call signal is detected for one second or more, the process advances to step S44.

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

In step S84, a signal from the signal line 4a is input, and it is determined whether or not on-hook is established. If on-hook is established, the process proceeds to step S86, and if off-hook, the process returns to step S84. There is also a case of a call when the user is off-hook.

In step S86, the timer RE
MT determines whether or not the time has elapsed, that is, whether 15 seconds or more have passed since being off-hook. If the timer REMT has timed out, that is, 15 seconds or more have elapsed since being off-hook, step S
Proceed to step 44. If the timer REMT has not timed out, that is, within 15 seconds after being off-hook, the process advances to step S88.

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

[0047] In step S88, C
Set the timer Timer, which is used to check whether an NG signal is detected, to 4 seconds.

In step S40, the signal line 19a
It is determined whether or not a CNG signal is detected. If a CNG signal is detected, the process proceeds to step S94, and the CN
If no G signal is detected, the process advances to step S92.

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

In step S94, the signal line 36c
Outputs a signal with signal level "1" to the monitor and turns on the monitor.

In step S96, a pulse is generated on the signal line 36d to send out a CED signal.

In step S98, the signal line 36c
Outputs a signal with signal level "0" to the monitor and turns off the monitor.

[0053] In step S100, remote reception is performed. In this remote reception, the communication operation is executed without checking for off-hook.

In step S102, the signal on the signal line 4a is input, and it is determined whether or not the hook has been hooked twice.
If hooked twice, the process advances to step S106; otherwise, the process advances to step S104.

In step S104, a signal from the signal line 4a is input, and it is determined whether or not it is on-hook. If it is on-hook, the process advances to step S44, and if it is off-hook, the process advances to step S102. When you are off-hook, there are cases where you can make a call.

In step S106, the signal line 36a
A signal with a signal level of "1" is output to the terminal, and the CML is turned on.

Note that the method of transitioning to remote reception is not limited to hooking and on-hook types. Remote reception may also be performed using a dial (DC impulse or DTMF) method.

Furthermore, when shifting to remote reception, instead of monitoring the CED signal, a signal indicating this may be sent to the child telephone.

Furthermore, the present invention is applicable not only to facsimile machines but also to various data communication devices such as teletex, and is not limited to the above-described embodiments, but can be modified in various ways.

[0060]

As explained above, according to the present invention, during automatic communication, if the other party is on the phone, the call can be made by off-hook, and during remote communication, regardless of the hook state, It is possible to reliably transition to data communication.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of a facsimile apparatus according to an embodiment.

FIG. 2 is a flowchart showing the control operation of the control circuit 36 in FIG. 1;

FIG. 3 is a flowchart showing the control operation of the 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 Adding 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 (1)

[Claims] 1. A data communication device having a remote communication means for communicating in response to an instruction from a telephone, comprising: automatic communication means for automatically carrying out data communication in response to an incoming call; means for detecting a hook state of the telephone; A data communication device characterized by having means for causing data communication to be performed regardless of the detection by the detection means during remote communication, and for causing communication by the telephone or data communication to be performed in accordance with the detection by the detection means during automatic communication.