JPH03291054A - Facsimile equipment - Google Patents

Abstract

PURPOSE:To optimize the communication and to improve the quality of communication by connecting a line correction circuit in matching with an optimum value of an opposite station in the case of reception and connecting a line correction circuit in matching with a telephone number of the opposite station in the case of transmission to the facsimile equipment. CONSTITUTION:When the facsimile equipment makes reception, the facsimile equipment sends various identification signals. The transmission station receiving them outputs a nonstandard function setting signal (NSS) and a training check signal (TCF). A receiver checks the content of the NSS by using a system control section 21 to identify the transmission station, references a connection form stored in a system memory 22 to select line correction circuits 281A-281C. In the case of the transmission, an original is set to the facsimile equipment and dials a telephone number, then the control section 21 selects line correction circuits 283A-283C in matching with the opposite party stored in the memory 22. Thus, the communication of the facsimile equipment is optimized and the quality of communication is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a facsimile apparatus that receives a received signal after appropriately correcting it according to the condition of a receiving line.

[Prior Art] Generally, when there is a document to be sent, this type of facsimile device first connects to the other party's facsimile device via a communication line, and after the connection is completed, it reads the document and converts it into an electrical signal. death.

The electrical signal is sent to the other party's facsimile machine via a communication line, and the other party's facsimile machine converts it into a document again.

As described above, each facsimile device is connected by a communication line, and therefore, depending on the condition of the communication line, communication errors may occur. Therefore, in each of the facsimile machines mentioned above, a fixed circuit correction device is always inserted in order to maintain the quality of the five communication lines at a constant level. Therefore, in the case of the above-mentioned conventional facsimile machine, correction is always performed regardless of whether the connection with the other party is good or bad.

For this reason, line compensation is performed even if the line is in a good connection state, resulting in overcompensation, which may actually worsen communication.

[Problems to be Solved by the Invention] In other words, in conventional facsimile machines, the circuit correction device installed in a fixed manner in order to maintain the quality of one communication line at a constant level may actually reduce communication when the line is in a good connection state. There were drawbacks that hindered this.

It is an object of the present invention to provide a facsimile device that eliminates the above-mentioned drawbacks and can perform circuit compensation according to the condition of a communication line.3 [Means for Solving the Problems] To achieve the above-mentioned objects. The facsimile device of the present invention is a facsimile device capable of transmitting and receiving image data via a communication line, and includes a plurality of line correction means for correcting the receiving line, a plurality of line correction means for correcting the receiving line, and a plurality of line correction means for correcting the receiving line, and a facsimile device for transmitting and receiving image data via a communication line. A communication control unit equipped with a plurality of line correction means installed on the transmission line for correction of the transmission line, a selector for selecting and connecting each of them, and a connection that identifies the transmitting station at the time of reception and sets it in advance. The present invention is characterized by comprising a system control unit that connects the selector to the connection mode and connects the selector to a connection mode that has been set corresponding to the telephone number of the other party at the time of transmission.

[Function] During reception, the present invention identifies the partner station and connects an @ line correction circuit that matches the optimal value of the partner station, and at the time of transmission,
Connect the line correction circuit that matches the phone number of the other party that you have set in advance.

This optimizes the communication of the facsimile machine and improves the communication quality.

[Example] An embodiment of the present invention will be described below based on the drawings.

FIG. 2 is a system configuration diagram showing an embodiment of the facsimile apparatus of the present invention.

The facsimile device includes a system control unit 21 that controls the operation of the entire device, a system memory 22 that includes a RAM that stores control data, and a ROM that stores control programs, etc., and a scanner 23 that reads a document and converts it into image data.
, a plotter 24 that records and outputs a copy image or a received image at a predetermined resolution, an operation display unit 25 that inputs operations and displays various types of information, and an encoder/decoder that encodes and decodes one image data under predetermined conditions. 26, an image memory 27 for accumulating image data, and a communication control section 28 for executing predetermined transmission control means with the other party are connected to the path line 31. The communication control unit 28 also includes a network control device 3 that controls the connection between a modem 29 that modulates and demodulates when exchanging data with a communication line, and one communication line.
0 is connected. A telephone set 31 is connected to the network control device 30 . This facsimile machine performs various operations under the control of the system control section 21.

The system control section 21 may be composed of a microprocessor unit, and controls the operation of the entire facsimile machine, identifies the transmitting station at the time of reception, connects the selector to a preset connection mode, and
The selector is connected to a connection form that has been set corresponding to the t and J numbers of the receiving station at the time of transmission. The scanner 23 reads the original image at a predetermined resolution and
Obtain circular image data. The plotter 24 makes a copy
! 1 m and a device for recording and outputting received images at a predetermined resolution. The operation display section 25 displays various information such as guidance messages for guiding the operator's operation procedures, and is composed of various operation keys necessary for operating the facsimile machine. Encoding/decoding section 2
6 encodes and compresses the image signal and reproduces the encoded image information into the original image signal. The image memory 27 stores read image data and also stores received images.

The communication control unit 28 of the present invention executes a predetermined transmission control procedure when transmitting data with a partner device, and is configured by inserting three line correction devices into each of the transmission line and reception line, which will be explained in detail later. ing. The modem 29 modulates and demodulates digital data when exchanging it using an analog transmission path such as a telephone line. The network control device 30 has an automatic calling/receiving function and connects this facsimile device to an analog transmission line.

FIG. 1 is a block diagram showing the main parts of a facsimile apparatus according to the present invention.

In FIG. 1, a modem 29, a communication control section 28, and a network control device 30 are shown, but the communication control section 28 is unique.

In the network control device 30, the line is connected to a polarity detection circuit 301. The line is connected to either the telephone 31 via the relay contact 302 or the dial generator 303 via the relay contact 302 according to a command from the control unit 300 .

When the line is connected to the facsimile side, one line is connected to a hybrid transformer 305 via a dial generator 303 and a DC cutter 304. hybrid transformer 3
In 05, the line is divided into a transmission line TL and a reception line RL for input and output to the network control device 30.

One communication control unit 28 is connected to this network control bag W30. In the communication control unit 28, line correction circuits 281A, 281B, and 281C are inserted into the reception line RL, and one of these circuits is selected by the selector 282. In addition, in the communication control unit 28, a line correction circuit 283 is connected to the transmission line TL.
A, 283B, and 283C are inserted, and one of these is selected by the selector 284. Selector 282, 28
4 is controlled by the control unit 280.

Here, the line correction circuit 281A of the reception line RL.

2818.28 IC and the line correction circuit 283^ of the transmission line TL.

283B and 283C correct high-frequency attenuation distortion for the 0 line, correct low-frequency attenuation distortion for the 0 line, and correct high- and low-frequency distortion for the 0 line. There are those that correct the group delay distortion for the 0 line, those that correct the relative level for the 0 line, etc., and these have separate effects on the transmission line TL and the reception line TL. There is.

The operation of the embodiment configured in this way will be explained below.

"When receiving" When the facsimile device (RX) of the present invention receives,
A called terminal identification signal (CED) is sent to the transmitting station (TX), followed by a digital identification signal (DIS) and a non-standard function identification signal (NSF). In response, the transmitting station sends a non-standard function setting signal (NSS), a training check (T
CP). The receiving facsimile device
The system control unit 21 examines the contents of S and sends it (identifies the i station. The contents of the NSS include information such as the transmitting station's identification signal, communication speed, paper width, etc.). The connection configuration of the correction circuits 281A, 281B, and 281C is stored in the system memory 22 of FIG.

Called by the system control unit 21 as necessary (
In FIG. 3, after receiving the NSS). Then, in the communication control section 28, the control section 280 switches and connects the selector 282 according to a command from the system control section 21.

This connection form is input in advance from the operation display section 25 by the operator.

“When transmitting J When the facsimile device (TX) of the present invention transmits,
The receiving station is identified by the telephone number of the other party. When the operator sets a document in the facsimile machine of the present invention and inputs a telephone number, the system control unit 21 uses the telephone number of the other party stored in the system memory 22 to adjust the line correction circuits 283A, 283B,
283C and selector 28 via control unit 280.
Switch and connect 4. As a result, the line correction circuit 28
3A, 283B, and 283C are selectively connected to appropriate line correction circuits to the other party.

The connection type corresponding to the telephone number is input in advance from the operation display section 25, and is always stored in the system memory 22 shown in FIG.
is stored in.

[Effects of the Invention] As described above, the present invention can correct the line according to the communication partner station, improve the quality of facsimile communication, speed up the facsimile machine, and reduce user complaints. effective.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a block diagram showing the overall configuration of the embodiment of the invention, and FIG. 3 is a sequence diagram for explaining the operation of the embodiment. 28... Communication control unit, 280... Control unit, 281
A~281G. 283^~283C... Line correction circuit, 282, 28
4...Selector.

Claims (1)

[Scope of Claim] A facsimile device capable of transmitting and receiving image data via a communication line, comprising: a plurality of line correction means provided on a receiving line that transmits only received signals, and that corrects the receiving line; and a plurality of line correction means that transmits only transmitted signals. a communication control unit equipped with a plurality of line correction means for correcting the transmission line, and a selector for selecting and connecting each of them; A facsimile apparatus comprising: a system control unit that connects the selector to a connection mode and connects the selector to a connection mode that has been set corresponding to a telephone number of the other party at the time of transmission.