JPH02192262A - Facsimile equipment - Google Patents

Abstract

PURPOSE:To reduce a trouble of transmission processing by selecting it as a reception error when a transmission error of a prescribed line number or over set a larger than a usual case are detected if the line quality is deterioration and the transmission error is easily caused. CONSTITUTION:Facsimile equipments 1, 2 connect to a public telephone line network 3, and an on-vehicle facsimile system 4 is mounted on an automobile and a facsimile equipment 41 is connected to an automobile telephone set 43 via an interface device 4. In the case of receiving a picture for one page and using a communication line or the automobile telephone set 43 in which a transmission error easily takes place, the error is selected as a reception error and informed to the sender when the error line number is over a prescribed line number set larger than the case in which the transmission error hardly takes place or the other consecutive line number criterion is exceeded. Thus, the trouble of the transmission process is relieved and a deteriorated reception picture in response to the quality of line is requested again for the retransmission.

Description

[Detailed description of the invention] [Industrial application fields] The present invention relates to a facsimile device.

[Prior Art] In the case of a commonly used facsimile machine that complies with the G3 standard recommended by the CCITT, the sending side sends encoded image information PIX for one page of a document, as shown in Figure 13. After that, for example, an EOP signal indicating the end of the page is sent. The receiving side sequentially receives the image information PIX and decodes the image information of each line, but detects a transmission error in the decoding process.

Conventionally, the receiving side receives one page of images.

For example, when a transmission error is detected on the IG line, which exceeds the number of lines, an RTN signal is sent back to the transmitting side to notify the transmitting side of the reception error. When the sending side receives the RTN signal, it sends out a DCN signal and cancels the sending process, while displaying a message such as ``Please resend, J'' on the display and prompting the operator to perform the sending operation. I was trying to request a redo.

Incidentally, in recent years, cars have been equipped with facsimile devices as well as car telephone devices and wireless devices to perform facsimile communications using wireless lines. Furthermore, in the case of NTT's car phone service, a new type of service was launched in the Tokyo metropolitan area in June 1988. The new car phone system uses a single-diaperity system that uses two antennas, which reduces the effects of fading on radio wave propagation and improves line quality compared to the old system.

In addition, in recent years, facsimile machines have been fitted with acoustic coverrs, and these acoustic coverrs have been attached to telephone handsets.
Facsimile communication is also used.

However, in communications using such wireless lines or acoustic duplexers, the condition of a single line is more likely to deteriorate than with a normal telephone line, so transmission errors of several dozen lines are common when transmitting a single page of images. occurs in

[Problems to be Solved by the Invention] Conventionally, due to such transmission errors, transmission is often canceled as described above, and the operator on the transmitting side
Each time, the sending operation had to be repeated.

Therefore, in order to solve this problem, it may be possible to have the receiving side receive the data as is even if a transmission error occurs, but in this case, the image quality of the received image deteriorates, making the received document etc. unreadable. There was a risk that it would disappear.

In this way, in the past, if the communication line was prone to transmission errors, there were the inconveniences of having to redo the transmission process, or of having to accept unreadable and inferior received images. there were.

SUMMARY OF THE INVENTION An object of the present invention is to provide a facsimile apparatus that can improve the above-mentioned problems and reduce the effort required for transmission processing, and can request retransmission of poor received images depending on the line quality.

[Means for Solving the Problems] To this end, the present invention provides that when an image for one page is received, if a communication line or a car telephone device that is prone to transmission errors is used, an error is detected. When the number of lines is equal to or greater than the number of partial blanks set larger than the case where transmission errors are unlikely to occur, or when transmission errors exceeding the number of partial blanks are detected consecutively, the sending side receives The feature is that an error is notified.

[Function] When transmission errors are likely to occur, even if the number of error lines is larger than usual, it is not treated as a reception error. This eliminates the need to redo the transmission operation on the sending side, reducing the effort required for transmission processing. Furthermore, since the criterion for determining the number of error lines is changed depending on the frequency of occurrence of transmission errors, it is possible to request retransmission of poor received images depending on the line quality. Moreover, in this case even if the number of error lines is small.

If a number of errors equal to or greater than the number of partial overlaps are detected consecutively, it is treated as a reception error, so if a poor image with a large portion missing is received, a retransmission request can be made.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows a system configuration diagram of a facsimile communication system according to a first embodiment of the present invention. In FIG.
It is connected to the. In addition, in-vehicle facsimile system 4
is a facsimile machine installed in a car! 4
1 is the interface device! 4, and is connected to a car telephone device 43 through the terminal 4. Facsimile machine 1
, 2.41 are configured to perform facsimile communication between each other.

The facsimile apparatuses 1.2 have the same configuration; the scanner 11 reads an original image and extracts image information at a predetermined resolution, and the plotter 12 records the image information on recording paper. The encoding/decoding unit 13 encodes image information to be transmitted and decodes received image information.

The network control bag W14 performs predetermined incoming and outgoing operations on the telephone line, and the modem 15 transmits various procedure signals and image information in transmission control procedures. It controls the modem 15 and transmits and receives image information according to a predetermined transmission control procedure.

The operation display unit 17 displays the operating status of the device, and
This is for the operator to perform various operations. The system control section 18 is composed of a microcomputer system, and controls each section mentioned above to execute predetermined operations of the facsimile machine.

Although not shown, the facsimile machine 41 is not provided with the network control device 14, and the other parts have the same configuration as the facsimile machines 1 and 2. In this case, the modem 15 is connected to the interface device 42. The interface device 42 connects the modem 15 and the car telephone device 4.
This is to match the signal level, impedance, etc. of the transmitted and received signals between the three.

With the above configuration, the operation when the facsimile device 1 receives an image from the facsimile device 2 or 41 will now be described.

FIG. 2 shows the receiving process of the facsimile machine 1 in this case. When the facsimile machine ill receives a call, it first sends out a CED signal, DIS, and NSF signals (process 101). NSS sent from
, receives the DC5 signal.

In this embodiment, the sending side uses an NSS signal to notify whether the facsimile device is being used on a normal telephone line or a car telephone line. Therefore, the receiving side determines the line to be used based on the NSS signal (process 102).

Next, the modem training signal and TCP signal from the transmitting side are received. Then, a predetermined modem training is executed, and if this is successful, a CFR signal is returned (processing 1).
03), then one page's worth of image information PIX is sequentially received. The received image information is decoded line by line, and during this decoding, it is determined whether there is a transmission error or not, and the received image of lines without errors is recorded on recording paper, and the number of error lines per page is counted. do. Assuming that the original to be transmitted is only one page, then an EOP signal indicating the end of the original to be transmitted is received (process 104).

Now, if the call is made from the facsimile machine 2 and a normal line is used (N in process 105), the number of error lines counted above is checked (process 106), and the number of error lines is less than 10 lines. If so (N in process 106), an MCF signal is sent to the transmitting side to notify that it was successfully received (process 107).

If the number of error lines is 10 or more (Y in process 106), an RTN signal is sent to the transmitting side to notify that there is a reception error (process 108).

In this case, the message "Please resend" is displayed on the operation display section 17 of the facsimile machine 2 on the sending side. The operator will redo the sending operation if necessary.

On the other hand, when the call is made from the facsimile device 4 and uses a car telephone line (Y in process 105), when the number of error lines is 50 or more (Y in process 109), and even if it is less than 5G lines (N in process 109), ), if there are 12 or more consecutive lines within one page (processing 1
10 Y), an RTN signal is sent (processing 108).

If the number of consecutive error lines is less than 12 lines (N in process 110), an MCF signal is sent (process 107).

As described above, in this embodiment, when an ordinary telephone line is used when receiving images, if there is an error on 10 or more lines, the sending side is always notified as a reception error, while the car telephone line When using this method, a reception error is not considered unless there is an error in 50 lines or more or 12 or more lines consecutively.

As a result, even if more transmission errors occur in a car telephone line than in a normal line, there is no need for the sending side to redo the sending operation, and the effort required for the sending process can be reduced. Furthermore, in the case of a normal line, the error judgment criteria are stricter than in the case of a car telephone line, so that it is possible to request retransmission of poor received images depending on the line quality.

For example, if the document size is A4 and the linear density is 3.85
When transmitting an image in the normal mode of /+u+, the number of lines on one page is approximately 1140 lines. In this embodiment, an error of about 5% is assumed, and an error of 50 lines or more is determined to be a reception error.

In addition, in normal documents, characters are often written at a size of about 5Il111 squares, and the above linear density of 5mm@ is 1
This corresponds to 3 lines. Therefore, in this embodiment, for example,
If you receive an image that is completely unreadable, such as a horizontally written document with one line of text missing.

By indicating a reception error, it is possible to request the sending side to retransmit.

In the above embodiment, the reception processing of the facsimile machine 1 is described which may or may not use the car telephone line, but the reception error when the car phone line is always used like the facsimile i41 is explained. It goes without saying that the determination can be fixed to arbitrary conditions.

In addition, the number of error lines, which is the criterion for receiving errors, is
Needless to say, it can be set arbitrarily.

Next, a second embodiment of the present invention will be described.

FIG. 3 shows a block diagram of the facsimile machine of this embodiment. The difference between the figure and FIG. 1 is that the facsimile machine 1 is provided with an external acoustic coupler 5 and an acoustic coupler interface section 19 for connecting the acoustic coupler 5. .

The acoustic coupler 5 is for attaching the handset of the telephone 6. The acoustic coupler interface section 19 inputs the received signal from the acoustic coupler 5 to the modem 15, and
The transmission signal from the acoustic coupler 5 is output to the acoustic coupler 5, and during operation, the system control unit 18 is notified that the acoustic coupler 5 is in use.

With this configuration, the facsimile apparatus of this embodiment has a function of communicating by connecting a telephone line to the network control device 14 and a function of communicating by attaching a telephone to the acoustic coupler 5.

Next, the operation when facsimile communication is performed between the facsimile apparatuses of this embodiment will be explained.

In this case, the transmitting side determines whether or not the acoustic coupler 5 is being used at the start of communication, and notifies the receiving side of the determination result using an NSS signal.

FIG. 4 shows processing on the receiving side, and the same reference numerals as in FIG. 2 indicate the same processing. In other words, the receiving side is
When receiving the second NSS signal, it is determined whether the acoustic coupler 5 is used on the transmitting side (process 111).

After receiving one page of image information and counting the number of error lines (processing 104), the status of use/non-use of the acoustic coupler 5 on the transmitting side and the use/non-use of the acoustic coupler 5 on the own device side are determined. The usage status is determined (process 112), and only when the acoustic coupler 5 is not used by both the own device and the other party (N in process 112), the process moves to process 106, and on the other hand, If you are using acoustic coupler 5 (
Step 112 (Y), then the process moves to step 109.

In general, communication using acoustic couplers causes more transmission errors than normal lines, but by changing the error criteria according to the line quality as described above, it is possible to redo the transmission operation, as in the previous example. In addition to reducing the effort required for transmission processing, it becomes possible to request retransmission of inferior received images.

In each of the above embodiments, as an example of poor line quality,
Although the present invention has been described using an example of using a car telephone line or an acoustic coupler, the present invention is not limited to these, and it goes without saying that the present invention can be similarly applied to cases where various communication lines with different line quality are used.

Now, FIG. 5 shows a device configuration diagram of a communication system according to a third embodiment of the present invention. In FIG. 0, an interface device 8 is connected to a wireless device 7A,
A handset 9A and a facsimile machine 10 are connected to the interface device 8.

The wireless device 7A and the hand set 9^ are the aforementioned old type car telephone devices, and there are 24 signal lines between them. The interface device 8 connects the wireless device 7A and the handset 9A to a 24-bin connector 8a,
8b.

Further, the interface device 8 of this embodiment can also use a new type of wireless device or handset.

For this purpose, a connector 8c for connecting the new wireless device 7B and a connector 8d for connecting the handset 9B are provided. There are 10 signal lines between the new wireless device 7B and the handset 9B, and the connectors 8c and 8d have 10 pins. In addition, when connecting the new wireless device 7B and the handset 9B,
Wireless device 7A and handset 9A are removed.

FIGS. 6(a) and 6(b) show circuit configuration diagrams of the interface device 8. FIG. The interface device 8 is
An old system interface section 81 necessary for connecting the old system wireless device 7A and handset 9A, a new system interface section 82 for connecting the old system wireless device 7B and handset 9B, and a common section 83 necessary for both types. It is composed of.

In the common section 23, one end of one winding of the transformer 8e is connected to a terminal of the transmission signal TD of the facsimile machine 10, and one end of one winding of the transformer 8f is connected to a terminal of the transmission signal TD of the facsimile machine 10.

They are respectively connected to terminals of the received signal RD. The other ends of the windings of the transformers 8e and 8f are both connected to the ground GND of the facsimile machine 10.

One end of the other winding of the transformer 8e is connected to the meter side contact a of one circuit of the relay 8g, and one end of the other winding of the transformer 8f is connected to the make side contact a8 of the other circuit. . Further, the power supply voltage V of the facsimile device 10
The terminal c and the terminal for the call/fax switching signal TEX are connected to both ends of each winding of the relays 8g and 8h, respectively. The transformers 8e and 8f are provided to isolate the ground line of the facsimile device 10 and the car telephone device in terms of direct current.

In the old system interface unit 81, the pin 1, which is the terminal for the transmission signal of the connector 8a, is connected to the common terminal C4 of one circuit of the relay 8g, and the pin 3, which is the terminal for the reception signal, is connected to the common terminal of the other circuit. Connected to C3. Also, pins 2 and 4 are the ground terminals for each of those signals.
are connected to the other ends of the other windings of transformers 8e and 8f, respectively.

Pin 1 of the connector 8b, which is a terminal for a transmission signal, is connected to a contact b□ of the relay 8g, and pin 3, a terminal for a reception signal, is connected to its contact b2.

The pins 2.4, which are ground terminals for the respective signals, are connected to pins 2 and 4 of the connector 8a, respectively.

Bin 15 is the hook signal terminal of connector 8a.

It is connected to the common terminal C of one circuit of the relay 8h, and its break side contact a is connected to the pin 15 which is the hook signal terminal of the connector 8b. Also, the line is
It is connected to the base of transistor 8j via resistor 81. The emitter of the transistor 8j is connected to the collector of the transistor 8, and the collector of the transistor 8j is connected to the base of the transistor 8.

The emitter of transistor 8 is connected to pin 8, which is the signal ground line of connector 8b, and its collector is
It is connected to one terminal on the diode side of the photocoupler 81. The other terminal on the diode side is a resistor of 8 m and a resistor of 8 m.
It is connected to pin 10, which is the power supply terminal of connector 8b, through n series circuits. A capacitor 80 and a Zener diode 8p are connected to the connection point between the resistor 8m and the resistor 81.
One end of each is connected, and the other ends thereof are both connected to pin 8 of connector 8b.

The emitter terminal of the phototransistor side of the photocoupler 81 is connected to the ground GND of the facsimile machine 10, and its collector terminal is connected to the terminal of the hook signal HOKA of the facsimile machine 10, and the resistor 8q
It is connected to the power supply voltage Vc of the facsimile machine 10 via. Further, the make side contact of the relay 8h is connected to the pin 8 of the connector 8b.

There are 24 connectors 8a and 8b, and signal terminals other than the transmission/reception signals of bins 1 and 3 and the hook signal of bin 15 are connected one to one between the two connectors. The connected signals are as follows. That is, the ground line for transmitting and receiving signals for bins 2 and 4, the power supply for bins 5 and 10, and the
Response pending signal, Bin 9 response pending indication signal, Bin 12
power on/off request signal, selection signal for bin 13, bin 1
4 clock signal, bin 16 out-of-range indication signal, bin 17
22, a spare terminal for bin 23, and a ground terminal for each of the above signals.

In the new method interface unit 82, the CPU 8r:
It is a single-chip LSI with built-in ROM and RAM, and digital signal input/output ports. This CPU8
r has serial interfaces 8g and 8t, which are LSI interfaces for inputting and outputting serial signals.
are connected by a signal bus.

Bin 1o, which is the power supply terminal of connector 8c, is connected to CPU 8r.
, the serial interfaces 8s and 8t, and the pin 9, which is the ground terminal of the connector 8d, is connected to each of the ground terminals G.

One terminal op1 of the output port of the CPU 8r is connected to one terminal on the diode side of the photocoupler 8v via a resistor 8u, and the other end is connected to the ground line of the CPU 8r. The collector terminal of the phototransistor of the photocoupler 8V is connected to the hook signal HO of the facsimile machine 110.
It is connected to the terminal of KB and also to the terminal of power supply voltage Vc via a resistor of 8V.

Further, its emitter terminal is connected to the ground GND.

The one-terminal IP terminal of the input port of the CPU 8r is connected to the common terminal C of the relay 8h via a diode 8x.

Serial signal output terminal O of serial interface 8s
is the pin 5 which is the upstream serial signal terminal of connector 8c.
The serial signal input terminal of the serial interface 8S is connected to the bin 6, which is the down serial signal terminal of the connector 8c.

Further, serial signal output terminal 0 of serial interface 8t is connected to bin 6, which is the down serial signal terminal of connector 8d, and its serial signal input terminal I is connected to bin 5, which is the up serial signal terminal of connector 8d. ing.

Bin l, which is the transmission signal terminal of connector 8c, is connected to relay 8
to the common terminal c8 of g, and the bin 3 which is the receiving signal terminal.
are respectively connected to the common terminal c2. Bin 1, which is the transmission signal terminal of connector 8d, is connected to relay 8g.
The pin 3, which is a reception signal terminal, is connected to the break-side contact b1 of the terminal, and the bin 3, which is a receiving signal terminal, is connected to the break-side contact b2. Further, the pin 2 which is the ground terminal for the transmission signal of the connector 8c is connected to the pin 2 side line which is the ground terminal of the connector 8a, and the pin 4 which is the ground terminal of the reception signal of the connector 8c is connected to the pin 4 of the connector 8a. It is connected.

Connectors 8c and 8d have 10 bins, and signal terminals other than the transmission/reception signals of bins 1 and 3 and the up and down serial signals of bins 5 and 6 are connected one-to-one between them. The connected signals are as follows. That is, the ground lines for the transmission and reception signals of bins 2 and 4, the power on/off request signal for bin 7, the power supply for bins 8 and 10, and the ground line for bin 9.

Bin 9, which is the ground line for connectors 8c and 8d, is
It is connected to the pin 8 which is the ground line of the connectors 8a and 8b.

FIG. 7 shows a block diagram of the facsimile machine 10. As shown in FIG. In the figure, a scanner 10a reads an original image and extracts image information, and a plotter 10a reads a document image and extracts image information.
b is for recording image information on recording paper. The encoding/decoding unit 10c encodes image information to be transmitted and decodes received image information.

The modem 10d modulates and demodulates image information and transmits it,
It transmits various procedure signals in transmission control procedures.
The communication control unit 10e, which inputs and outputs the transmission signal TD and reception signal RD, executes predetermined transmission control and executes facsimile communication.

The handshake port 10f outputs a call/fax switching signal TEX and inputs hook signals HOKA and HOKB. The operation display section 10g is used to display the operating status of the device and perform various operations for transmission and reception.

The system control section 10h is constituted by a microcomputer system, and controls each section mentioned above to execute predetermined operations of the facsimile machine.

The power supply section 10i supplies power to each of the above sections.

A power supply voltage Vc is supplied to the interface device 8.

Next, with the above configuration, the operation when using the old wireless device 7^ and the handset 9A will be described.

First, when making a call, the operator uses the handset 9A
off the hook.

When the facsimile machine IO is not operating, the call/fax switching signal TEx is at a high level. As a result, each winding of relay 8g and relay 8h is energized, and common terminal cttci of relay 8g is energized.
are connected to the contacts S, B, and connector 8, respectively.
All lines on the a side are connected to the connector 8b side.

Therefore, the radio device 7A and the handset 9A can operate as if the interface device 8 were not provided.

When the handset 9A is off-hook, FIG. 8(a)
, As shown in (b), each hook signal of the connector 8b and the bin 15 of the connector 8b becomes low level.

In addition, the hook signal causes transistors 8j and 8k to
is turned on, the diode of the photocoupler 81 is energized, and the photodiode is turned on. As a result, the hook signal HOKA input to the facsimile machine 10 becomes low level, as shown in FIG. 2(c).

The wireless device 17A outputs a dial tone as a received signal when the handset 9A goes off-hook, as shown in FIG.

The operator confirms the dial tone using the handset 9A and dials the telephone number of the other party.

As a result, the wireless device 7^ performs one calling operation and then outputs a ringing tone.

When the other party answers, the operator notifies the recipient that facsimile communication will be carried out over the phone, and then
0, set the original to be transmitted on the scanner 10a, press the communication start button on the operation display section 10g, and put the handset 9A on-hook.

When the communication start button is pressed, the facsimile machine 10 checks the hook signal HOKA and starts operating only when the signal is at a low level.

When the facsimile group gilO starts operating, the same figure (
As shown in f), the call/fax switching signal TEX is set to low level. As a result, each winding of relay 8g and relay 8h is energized, and the common terminal e of relay 8g
The connection of ttc* is switched to the make contact A wax side, and the common terminal C of the relay 8h is switched to the make contact side.

By switching the relay 8g, the transmitting signal line of the wireless device 7A is connected to the transmitting signal TD line of the facsimile device 10 via the transformer 8e, and the receiving signal line of the wireless device 7A is connected to the transmitting signal TD line of the wireless device 7A via the transformer 8e. It is connected to the line of the received signal RD of the facsimile machine 10 via. Further, by switching the relay 8h, the hook signal terminal 15 of the connector 8a is set to a low level, and even when the handset 9A is on-hook, the hook signal to the wireless device 7A is maintained at a low level.

In this state, the facsimile group W10 outputs the transmission signal TO, inputs the reception signal RD, and executes predetermined communication with the other party's facsimile machine.

When the communication is completed, the call/fax switching signal TEX is returned to high level.

When the call/fax switching signal TEX becomes high level, the relay 8g switches to the contacts S, B2, and the relay 8h switches to the contact A side. As a result, the transmission and reception signals between the wireless device 7A and the handset 9A are directly connected, and the hook signal to the wireless device 7A returns to high level, and the above communication ends.

When the next call arrives, the operator responds to the ringing by off-hooking the handset 9A. Then, the user first speaks to the other party, and when notified of the facsimile communication, presses the communication start button on the facsimile machine 10.

The state of each part during the above call is the same as the call state in FIG. 8. Therefore, when the communication start button is pressed after that, the facsimile device 10 starts executing the predetermined facsimile communication in the same manner as described above.

On the other hand, when using a new type of wireless device and handset, remove the wireless device 7A and handset 9A and connect the wireless device 7B and handset 9B to the interface device 8 as explained in FIG. .

By the way, in this new system, up and down serial signals are input and output between the wireless device 7B and the handset 9B in order to indicate various states and control information between the two.

Each of these serial signals includes a start bit ST and 8-bit data 00 to D7, as shown in FIG. 7(a).
, a parity bit P, and a stop bit SP.

When the hook switch information of the handset 9B is indicated by this uplink serial signal, "101001" is set in the data bits D7 to D2, as shown in FIG. 9B. When the data X of data bit D0 is "1", it indicates an off-hook state in which a DC loop of the telephone line is formed, and when it is '0', it indicates an on-hook state in which the DC loop is open. D.
The data Y of the handset 9B when pp 1 pp
'0' indicates the handset is in the raised state, and '0' indicates the handset is in the lowered state.

As shown in FIG. 10, the CPU 8r and serial interfaces 8g and 8t receive the downlink serial signal SD from the wireless device 7B and transfer it as is to the handset 9B. It also inputs an upper real signal SU from the handset 9B and transfers it to the wireless device 7B. At this time, the hook state is detected from the above hook switch information data X of the uplink serial signal sU, and when on-hook,
The signal level of one terminal oP1 of the output port is set to low level, and set to high level when off-hook.

Further, when the signal level of one terminal IP terminal of the input port is high level, the uplink serial signal from the handset 9B is transferred as is to the wireless device 17B, while the terminal I
When the signal level of P is low level, an on-footer state is set in the hook switch information of the uplink serial signal and transferred to the wireless device 7B.

Now, when the operator makes a call, he first takes the handset 9B off-hook.

As described above, when the facsimile machine 10 is not operating, the 1 call/fax switching signal TEX is at a high level, and the contact C1 #C1 of the relay 8g is
, b, side, respectively. As a result, bin 1, which is a terminal for transmitting signals, and bin 3, which is a terminal for receiving signals, are connected between connector 8c and connector 8d, respectively.

Also, at this time, the common terminal C of the relay 8h is connected to the contact a
Since it is connected to the side and becomes high level, the terminal IP terminal of CPU8r is also set to high level. For this reason, the 10th
As explained in the figure, wireless device 7B and handset 9B
Up and down serial signals are transferred as they are between the two.

. Therefore, the wireless device 7B and the handset 9B can operate as if the interface device 8 were not provided.

When the handset 9B is taken off-hook, FIG.
), (b), data X of the hook switch information of the uplink serial signal in bin 5 of connectors 8c and 8d both become "1", indicating an off-footer state.

The CPU 8r detects this off-hook state and connects the terminal O.
Set the output of P-engine to high level. As a result, the photodiode of the photocoupler 8v is energized and its phototransistor is turned on. Therefore, as shown in FIG. 11(e), the hook signal HOK of the facsimile machine 10 is
B becomes low level.

When the handset 9B goes off-hook, the wireless device 7B outputs a dial tone as a received signal, as shown in FIG.

The operator confirms the dial tone using the handset 9B and dials the telephone number of the other party.

As a result, the handset 9B performs a calling operation and then outputs a ringing tone.

When the other party answers, the operator notifies them that facsimile communication will be carried out by telephone, and then calls facsimile group 91.
0, set the original to be sent on the scanner 10a, press the communication start button on the operation display section log, and turn on the handset 9B.

When the 1st communication start button is pressed, the facsimile machine 10 confirms that the hook signal (IQKB) is at a low level as described above, starts operation, and
As shown in f), the call/fax switching signal TEX is set to low level. As a result, each winding of relay 8g and relay 8h is energized, and common terminal C of relay ag is energized.
1tca is switched to the make contact aitaa side, and the common terminal C of the relay 8h is switched to the make contact side.

By switching the relay 8g, the transmitting signal line of the wireless device 7B is connected to the transmitting signal TD line of the facsimile device 10 via the transformer 8e, and the receiving signal line of the wireless device 7B is connected to the transmitting signal TD line of the facsimile device 10 via the transformer 8e. is connected to the receiving signal RD line of the facsimile family [10] via the facsimile group [10]. Also, by switching relay 8h, the CPU
The terminal IP of 8r is set to low level, and the wireless device t7B
Hook switch information data of upstream serial signal to
is set to "1". This allows handset 9
Even if B is on-hook, the off-hook state is notified to the wireless device 7B.

In this state, the facsimile machine 10, as described above,
While outputting the transmission signal TD, the reception signal RD is inputted to execute predetermined communication with the other party's facsimile machine. When the communication is completed, the call/fax switching signal TEX is returned to high level.

When the call/fax switching signal TEX becomes high level, the relay 8g switches to the contact b side and the relay 8h switches to the contact a side. As a result, wireless bag @
Transmission and reception signals between wireless device 7B and handset 9B are directly connected, and the hook switch information to wireless device 7B returns to the on-hook state, and the above communication ends.

Next, when a call arrives, the operator responds to the ringing with the handset 9B. Then, the user first talks to the other party, and when notified that it is a facsimile machine, presses the communication start button of the facsimile group N10.

The state of each part during the above call is the same as the call state shown in FIG. Therefore, when the communication start button is pressed after that, the facsimile device 10 starts executing the predetermined facsimile communication in the same manner as described above.

By the way, when the facsimile machine 10 performs reception processing during the above communication, it operates as shown in FIG. 12. That is, once communication begins.

A pre-message procedure is executed according to a predetermined transmission control procedure (process 201), and then image information for one page is sequentially received. The received image information is decoded line by line, and during decoding, it is determined whether there is a transmission error or not, and the received image of lines without errors is recorded on recording paper, and the number of error lines per page is counted. (process 202).

The facsimile device 10 is used with an old wireless device 7A and a handset 9A, and a new wireless device 7A.
B and 9B may be used. Facsimile group W
110 determines which of the old and new devices is being used, depending on which of the hook signals HOKA and HOKB is at a low level (process 203).
.

Assuming that the hook signal HOKA is now at a low level, that is, used in an old system device (Y in process 203),
Next, it is determined whether the counted number of error lines is 50 or more (process 204). If the number of lines is 50 or more (Y in process 204), R
Sends a TN signal and notifies reception error (process 20
5).

Also, if the number of error lines is less than 50 lines (processing 2
04 N), and further determines whether there are 12 or more consecutive lines (process 206).
If it is more than 12 lines (Y in process 206), an RTN signal is sent in the same way as above (process 205), but if it is less than 12 lines (N in process 206), an M
Sends a CF signal and notifies that it has been successfully received (
Processing 207).

On the other hand, if the hook signal HOKB is at a low level, that is, it is used in a new system device (N in process 203),
Next, it is determined whether the number of error lines is 25 or more (process 208), and if it is 25 or more (Y in process 208), an RTN signal is sent (process 205), while if the number of error lines is less than 25, time (processing 208
N), and further determines whether there are 12 or more consecutive lines (processing 206), and similarly to the above, if there are 12 or more consecutive lines (Y in processing 206), R
If the number of lines is less than 12 (N in process 206), the MCF signal is transmitted (process 207).

As described above, in this embodiment, it is possible to use car telephone devices of either the old or new system, and when receiving images, the error judgment criteria for the new system is higher than that for the old system. are strict.

As mentioned above, this new type of car phone device is
This is because compared to the old system, the influence of fading on radio wave propagation is reduced and the quality of one line is improved.

In this way, since the error determination criteria are changed depending on the line quality of the old and new systems, it is possible to reduce the effort of redoing the transmission operation due to transmission interruption when the line quality is poor in the old system. Furthermore, in the new system, it becomes possible to request retransmission of received images that are inferior to those in the old system.

Note that in one or more embodiments, the error determination criteria for the old and new methods are set to 25 lines and 50 lines, but it goes without saying that these values may be arbitrary.

In addition, we have explained the case where a facsimile device connected to a car telephone device performs a receiving operation, but when this facsimile device transmits, it notifies the receiving side of the difference between the new and old methods using the NSS signal, etc. of the procedure signal. , the receiving side may change the error determination criteria as in this embodiment.

Furthermore, car telephone equipment is currently used by NTT
Although the new and old systems have been assumed, it goes without saying that the present invention can be similarly applied not only to these models but also to the case where devices with different line quality are used.

[Effects of the Invention] As described above, according to the present invention, when line quality is poor and transmission errors are likely to occur, reception errors are detected when transmission errors are detected on more than a certain number of lines set larger than normal. In this case, even if many transmission errors occur, there is no need to redo the transmission operation on the sending side, reducing the effort of the transmission process, while the criteria for determining the number of error lines depends on the line quality. Since the received image is changed depending on the line quality, a retransmission request can be made for poor received images, and in this case, if there are transmission errors on more than a certain number of consecutive lines, it is treated as a reception error, so there is no possibility that a large portion of the image is missing. If you receive a poor image, such as
You can request retransmission.

[Brief explanation of the drawing]

FIG. 1 is a system configuration diagram of a facsimile communication system according to a first embodiment of the present invention, FIG. 2 is an operation and flowchart of its reception processing, and FIG. 3 is a facsimile apparatus according to a second embodiment of the present invention. 4 is an operation flowchart of the receiving process, and FIG. 5 is a block diagram of the third embodiment of the present invention.
FIG. 6 (a) is a device configuration diagram of a communication system according to an embodiment of
), (b) are circuit configuration diagrams of the interface device, FIG. 7 is a block diagram of the facsimile device, FIG. 8 is a time chart of each signal during facsimile communication using an old car phone device, and FIG. ) is an explanatory diagram of the serial signal, (b) is an explanatory diagram of hook switch information data based on the serial signal, Fig. 10 is an explanatory diagram of the functions of the CPU and serial interface, and Fig. 11 is an explanatory diagram of the new type of car phone device. FIG. 12 is a time chart of each signal during facsimile communication, FIG. 12 is an operational flowchart of the reception process in the above embodiment, and FIG. 13 is an explanatory diagram of the transmission control procedure in the event of a reception error. 1.2. ．． 10.41...Facsimile machine, 3...
・Public telephone line network, 5...Acoustic coupler, 8, 42...
・Interface device, 7A, 7B... Wireless device, 9A, 9B... Handset, 10a, 11.
"Scanner, 10b, 12...Plotter, 10c, 1
3-encoding/decoding unit, 10d, 15...modem, 10
e, 16... Communication control section, 10g, 17... Operation display section, 10h, 18... System control section, 10f...
・Handshake port, 101...Power supply section, 14・
. . . Network control device, 19 . . . Acoustic hybrid interface section, 43 . . . Car telephone device, 81 .
3...Common area. Figure 4 Figure 4 Figure 10 Figure

Claims (2)

[Claims] (1) If a 1-page image is received and a transmission error exceeding the set number of lines is detected, the sending side is notified of the reception error.In a facsimile machine, if the communication line used is likely to cause transmission errors. When detecting a transmission error on a certain number of lines or more, which is set larger than the number of lines mentioned above in cases where transmission errors are unlikely to occur,
Alternatively, a facsimile apparatus is characterized in that the facsimile apparatus is equipped with a transmission control means that notifies a transmitting side of a reception error when transmission errors are continuously detected on a predetermined number of lines or more. (2) When a facsimile machine receives one page of images and detects a transmission error for more than the set number of lines, it notifies the sending side of the reception error. A car phone device connecting means to which any one of the above is connected, a device identification means for identifying the connected car phone device, and a transmission error if the identified car phone device is likely to cause a transmission error. When a transmission error is detected on a certain number of lines or more set higher than the number of lines mentioned above in cases where it is unlikely to occur, or when transmission errors are detected on another certain number of lines or more consecutively, the sending side receives A facsimile device comprising a transmission control means for notifying an error.