JPH04324743A - Data communication equipment - Google Patents

Abstract

PURPOSE:To utilize one line for a talking and data communication effectively and to smooth the transit from the talking to the data communication. CONSTITUTION:When a call comes from a line 2a, while a control circuit 40 uses a ring back tone transmission circuit 18 to send a ring back tone, the control circuit 40 uses a CNG signal detection circuit 22 to discriminate whether or not a CNG signal is detected within a prescribed time and makes facsimile reception upon the detection of the CNG signal. On the other hand, when no CNG signal is detected, a pseudo bell tone generating circuit 38 generates a pseudo bell tone, the data communication equipment is provided with the TEL/ FAX automatic changeover mode to call the operator for talking with a telephone set 4 and with the remote reception mode allowing an NCU 2 to select the facsimile position from the position of the telephone set 4 based on a remote reception command by twice hooking of the telephone set 4 during the talking with the telephone set 4 to implement the facsimile reception. In the case of the remote reception, the processing of TEL/FAX automatic changeover is not implemented.

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 an automatic switching function for automatically switching between voice communication and data communication in response to a signal from the other party.

0002

2. Description of the Related Art Conventionally, as this type of device, for example, a facsimile device having an automatic telephone/facsimile (TEL/FAX) switching function is known. This TEL/FA
Various methods have been proposed for automatic switching of X, but
For example, if a CNG signal (a calling tone signal indicating that it is a non-voice terminal) is detected within a predetermined time after answering an incoming call, the mode will shift to facsimile mode, and the
In some cases, if an NG signal is not detected, the conversation shifts to a telephone conversation.

[0003] Furthermore, in facsimile machines, one line is selectively shared with a remote telephone, and incoming calls from the line are answered by the remote telephone, and then the line is transferred to the telephone by remote operations such as dialing from the telephone. There are some devices that allow you to switch from a facsimile device to a facsimile device and have the facsimile device perform remote reception.

0004

[Problem to be solved by the invention] Therefore, the above-mentioned T
It is thought that by having the EL/FAX automatic switching function together with remote reception using the above-mentioned remote telephone, one line can be used more efficiently for telephone calls and facsimile communications.

However, when both of the above functions are provided, if the facsimile machine is activated by remote operation from a remote telephone and operated in TEL/FAX automatic switching mode, facsimile reception will be interrupted if a CNG signal is not detected. Even though you have performed remote control to do so, the machine may switch back to call mode and be unable to receive faxes.

[0006]

[Means for Solving the Problems] The present invention provides an automatic switching means for automatically switching between communication and data communication, and a remote communication means for performing data communication in response to a remote instruction from a telephone. can be used effectively for calls and data communication, and when data communication is performed by remote communication means, the automatic switching means is disabled to allow a smooth transition from calls to data communication. It is.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings.

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

In the figure, 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 the data communication path, and connect the loop. Network control unit NCU (Net
The signal line 2a, which is a work control unit, is a telephone line. The NCU 2 inputs the signal on the signal line 40a, 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. Also, if the signal on the signal line 40a is input and 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.

4 is a telephone.

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 20a passes through the signal line 2c, and is sent out to the telephone line via the NCU 2. Further, a signal sent from the other party passes through the NCU 2, passes through the signal line 2c, and is output to the signal line 6a.

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 40
The procedure signal b is input, modulation is performed, and the modulated data is output to the signal line 8a.

[0013] 10 is a reading circuit, which reads the transmitted original.
Image signals for one line in the main scanning direction are sequentially read and a signal string representing binary values of white and black is created. CCD (charge coupled device)
It consists of an image sensor and an optical system. The black and white binary signal string is output to the signal line 10.

12 inputs the read data output to the signal line 10a and performs encoding processing (MH (Modified Huffman) encoding or MR (Modified Huffman) encoding).
The read/encoded data is output to the signal line 12a.

[0015] 14 is the well-known CCIT recommendation V27ter.
It is a modulator that performs modulation based on (differential phase modulation) or V29 (quadrature modulation). The modulator 14 is connected to the signal line 1
2a is input, modulation is performed, and the modulated data is output to the signal line 14a.

16 transmits a CED signal to the signal line 16a when the CED signal transmission pulse is generated on the signal line 40c, and 16 transmits the CED signal transmission end to the signal line 16b when the CED signal transmission is completed. Generates a pulse.

18, a signal level "1" is applied to the signal line 40d.
” is output, a ringback tone is sent to the signal line 18a. Furthermore, when a signal of signal level "0" is output to the signal line 40d, the circuit 18 does nothing.

Reference numeral 20 denotes an adder circuit which inputs the signals of the signal line 8a, the signal line 14a, the signal line 16a, and the signal line 18a, and outputs the added result to the signal line 20a.

22 inputs the signal of the signal line 6a, and CN
This is a CNG signal detection circuit that generates a CNG signal detection pulse on the signal line 22a when a G signal is detected.

A demodulator 24 performs demodulation based on the well-known CCITT recommendation V21. The demodulator 24 inputs the signal on the signal line 6a, performs V21 demodulation, and outputs demodulated data to the signal line 24a.

[0021] 26 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 26 is connected to the signal line 6
A signal is input, demodulated, and the demodulated data is sent to signal line 2.
Output to 6a.

28 inputs the signal of the signal line 26a, and outputs the decoded data (MH (Modified Huffman) decoding or MR (Modified Read) decoding) to the signal line 28a.

Reference numeral 30 denotes a recording circuit which inputs the decoded data outputted to the signal line 28a and sequentially records white and black signals line by line.

32 is a speaker circuit. The speaker circuit 32 does not operate when a signal of signal level "0" is output to the signal line 46e, and does not operate at all when a signal of signal level "1" is output to the signal line 46e.
Input and monitor the signal output to a.

34 is manual reception/automatic reception/FAX・T
This is a switch button for EL automatic switching. By pressing the button, the reception state is switched. When the button is pressed, a pulse is generated on the signal line 34a.

36 is a circuit that displays the reception status. When the power is on, manual reception is displayed, and every time a pulse is generated on the signal line 34a, automatic reception is displayed, F
AX/TEL automatic switching display and manual reception display are repeated. When manual reception is displayed, the signal line 36a is connected to
When the signal "0" is output and automatic reception is displayed, the signal "1" is output to the signal line 36a and the FAX is
- When displaying automatic switching of TEL, a signal "2" is output to the signal line 36a.

Reference numeral 38 is a circuit that generates a pseudo bell sound for calling an operator. 38 generates a pseudo bell sound when a signal with a signal level of "0" is output to the signal line 40f, and generates a pseudo bell sound when a signal with a signal level of "1" is output to the signal line 40f. does not occur.

Reference numeral 40 denotes a control circuit that performs the control described below, and is composed of a microcomputer and peripheral devices such as ROM and RAM that store control programs. That is, the facsimile machine of this embodiment has manual reception mode, automatic reception mode, and FAX/TEL automatic switching mode (while transmitting a ringback tone signal, which is a pseudo ringing tone, to the other party, a CNG signal is transmitted within a predetermined time). When a CNG signal is detected, the mode shifts to receiving operation, and if no CNG signal is detected within a predetermined period of time, the mode shifts to calling an operator for a call. The receiving instruction is hooking or pressing a specific key, and the remote receiving operation is performed regardless of the subsequent CNG signal from the other party). Then, when the remote reception operation is performed, the process shifts to the reception operation without activating the FAX/TEL automatic switching process, and the other FAX/TEL
When a call is established by the EL automatic switching process, subsequent remote reception operations are enabled.

FIG. 2 is a flowchart showing the control operation of the control circuit 40 shown in FIG.

The operation of this embodiment will be explained in detail below according to the flowchart shown in FIG.

First, when execution of the control program is started in step S50 of FIG. 2, a signal of signal level "0" is output to the signal line 40a in step S52, and
Turn off CML. In addition, the signal level “0” is applied to the signal line 40e.
", turns off the monitor, outputs a signal with signal level "0" to signal line 40f, and outputs a signal with signal level "0" to signal line 40d, thereby connecting line 2a to the telephone 4 side. At the same time, the ringback tone sending circuit 18 and the pseudo bell generating circuit 38 are initialized. When the initialization is completed, the process advances to step S54, and in step S54, the signal on the signal line 2d is input and it is determined whether or not a calling signal (CI signal) is detected (whether or not there is an incoming call). If a calling signal (CI signal) is detected, the process proceeds to step S58; if a calling signal (CI signal) is not detected, the process proceeds to step S56, and after other processing is performed, the process returns to step S52.

When an incoming call is detected, the process advances from step S54 to step S58, where the signal from the signal line 36a is input, and it is determined whether or not the manual reception mode is set. Determine whether reception mode is set. When the mode is manual reception mode, the process advances from step S58 to step S59;
When the automatic reception mode is selected, the process advances from step S84 to step S86. Further, if it is determined in step S84 that the automatic reception mode is not set, it is assumed that the TEL/FAX automatic switching mode is set, and the process proceeds to step S88.

In the case of manual reception mode, step S5
9. In S60, S62, and S64, it is determined whether the mobile phone is off-hook and no call signal is detected for one second or more continuously. And when those conditions are met,
The process advances to step S66. Also, if on-hook is detected or a call signal is detected within 1 second, step S
Return to 52. If the handset of the telephone 4 is off-hook for more than one second and no ringing signal is detected, it is assumed that the operator has responded to the incoming call using the telephone 4, and thereafter processing for remote reception is performed.

That is, in steps S66 and S68, the signal on the signal line 4a is input while the telephone 4 is off-hook, and it is determined whether the telephone 4 has been hooked twice.
If hooked twice, the process advances to step S70, and if the telephone 4 is on-hook without being hooked twice, the process returns to step S52.

[0035] When hooking is detected twice in steps S66 and S68, it is assumed that remote reception has been instructed from the telephone set 4, and reception operation is performed from step S70 onward without activating the FAX/TEL automatic switching process. I do. First, in step S70, a signal of signal level "1" is output to the signal line 40a to turn on the CML. Then, in step S72, the signal line 40
Output a signal with signal level "1" to e, turn on the monitor,
In step S74, a pulse is generated on the signal line 40c to send out the CED signal.

Further, in step S76, the signal line 40e
Outputs a signal with signal level "0" to the monitor and turns off the monitor. By turning on and off this monitor, the operator can hear the CED sound from the speaker and confirm that remote reception has been accepted.

In step S78, a pre-procedure is executed, and in step S80, image signal reception is executed. When the reception of the image signal is completed, a post-procedure is executed in step S82, and then the process returns to step S52.

[0038] Also, the automatic reception mode is set, and when the process proceeds from step S84 to step S86, the signal line 40
A signal of signal level "1" is output to a, and the CML is turned on. Then, in step S87, a pulse is generated on the signal line 40c to send out a CED signal, and then the process advances to step S78 to execute reception processing.

Further, the automatic TEL/FAX switching mode is set, and when the process advances from step S84 to step S88, a signal with a signal level of "1" is output to the signal line 40a, and the CML is turned on. Then, in step S90, a signal with a signal level of "1" is output to the signal line 40d, and a ringback tone indicating that a call is being made to the other party is sent.

In step S92, the timer Tim
er is set to 8 seconds, and in steps S94 and S98, the signal on the signal line 22a is input, and within 8 seconds, CN
It is determined whether a G signal is detected. CNG within 8 seconds
If a signal is detected, the process proceeds to step S96 to stop sending out the ringback tone, and then proceeds to step S78 to execute reception processing. If no CNG signal is detected within 8 seconds, the process proceeds from step S98 to step S100.

In step S100, CNG is not detected due to the FAX/TEL automatic switching process and a call is made, so a signal with a signal level of "1" is output to the signal line 40f, a pseudo bell sound is sent out, and a call is made. Call an operator to perform the operation. Then, in step S102, the timer is set to 20 seconds, and in step S10
4. In S106, input the signal on the signal line 4a, and
Determine whether the operator responded within 0 seconds. 2
If the operator responds within 0 seconds, step S108
If the operator does not respond within 20 seconds, the process advances to step S52.

In step S108, a signal with a signal level "0" is output to the signal line 4a, and in step S110 with CML, a signal level "0" is output to the signal line 40f.
" signal is output, the pseudo bell sound is stopped, and step S1
At step S12, a signal with a signal level of "0" is output to the signal line 40d, and after stopping the transmission of the ringback tone, the process proceeds to step S60. When the telephone call is transferred to the telephone 4 by this TEL/FAX automatic switching process, the process proceeds to steps S60 to S68 to detect a remote reception instruction (two hookings) from the telephone 4, and to perform remote reception. When an instruction is detected, reception processing is performed.

[0043] In the above-mentioned embodiment, FAX/T
When the EL automatic switching switches to talk mode and calls the operator, and the operator does not answer the call,
The line was disconnected. However, a pre-procedure signal may be sent here. Specifically, in step S106 of FIG. 2, if YES, the process moves to the pre-procedure.

[0044] Furthermore, in the above embodiment, FAX/
TEL automatic switching transmits a ringback tone signal to the other party, and if a CNG signal is detected within a predetermined time, it shifts to reception operation, and if a CNG signal is not detected within a predetermined time, the operator I thought of a type that transitions to calling. This is called the CNG detection type. This type does not shift to procedure signal transmission unless a CNG signal from the other party is detected. On the other hand, there is a type that unconditionally shifts to transmitting a procedure signal, then shifts to calling an operator when a voice is detected or when no significant signal is detected for a predetermined period of time, and shifts to receiving operation when a significant signal is detected. Yes, this can be identified as a voice detection type.

Furthermore, in the above-mentioned embodiment, remote reception is a type in which the remote reception instruction from the telephone is hooking or the pressing of a specific key, and the operation shifts to remote reception regardless of the subsequent signal from the other party. I thought about (hooking type). This type unconditionally shifts to remote reception operation when remote reception operation is selected. On the other hand, when remote reception operation is selected, for example when on-hook, within 30 seconds after incoming call is detected and the CN
There is a type (on-hook type) that shifts to remote reception operation when a G signal is detected.

[0046] Figure 3 shows the effectiveness of remote reception after a call has been made by FAX/TEL automatic switching and FAX/TEL automatic switching after remote reception using the above-mentioned FAX/TEL automatic switching type and remote reception type. Summarized. In this example, the FAX/TEL automatic switching is of the CNG detection type, and the remote reception is of the hooking type. That is, depending on the type of FAX/TEL automatic switching and the type of remote reception, it is better to change the remote reception after a call is made by FAX/TEL automatic switching, and the FAX/TEL automatic switching after remote reception as appropriate.

Furthermore, the present invention is not limited to the above-described embodiments, and various modifications are possible.

[0048]

As described above, according to the present invention, one line can be used for both voice and data communication by providing automatic switching means for voice and data communication and means for performing data communication by remote operation from a telephone. It can be used effectively, and even when data communication is performed by remote operation, it can smoothly transition from phone calls to data communication.

[Brief explanation of the drawing]

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 40 of this embodiment.

FIG. 3 is a diagram showing the presence or absence of automatic FAX/TEL switching and remote reception after remote reception, depending on the type of automatic FAX/TEL switching and remote reception.

[Explanation of symbols]

2 NCU 4 Telephone 6 Hybrid circuit 8 V21 modulator 10 Reading circuit 12 Encoding circuit 14 V27ter or V29 modulator 16
CED signal sending circuit 18 Ringback tone sending circuit 20 Adding circuit 22 CNG signal detecting circuit 24 V21 demodulator 26 V27ter or V29 demodulator 28
Decoding circuit 30 Recording circuit 32 Speaker circuit 34 Manual reception/automatic reception/F/T switching button 36 Reception status display circuit 38 Pseudo bell sound generation circuit 40 Control circuit

Claims (3)

[Claims] Claim 1: A data communication device selectively connected to a telephone line, comprising automatic switching means for automatically switching between voice communication and data communication in response to a signal from the other party, and detecting a remote instruction from the telephone. and remote communication means for performing data communication in response to the detection, wherein the automatic switching means does not function when the remote communication means performs data communication. 2. The data communication device according to claim 1, wherein the remote communication means is made operable when the automatic switching means shifts to a telephone call. 3. In claim 1, the automatic switching means detects whether or not a signal indicating data communication is received from the other party within a predetermined time, and switches between call and data communication according to the detection. A data communication device characterized by: