JPH0226169A - Facsimile equipment - Google Patents

Abstract

PURPOSE:To optimumly set a transmitting and receiving characteristic even to any one of plural lines to be connected. CONSTITUTION:By a telephone number from an operating part 4 of a facsimile equipment 10, a control part 1 controls a PBX20 through a network control part 3 and selects either a analog line 30 or a digital line 40. For example, when dialling is started from 0, the control part 1 judges the line 30. When connection between devices is completed, a prescribed communication order is executed. In such a case, a facsimile signal optimumizes the characteristic of a transmitting signal through a MODEM 2 by the network control part 3 with being matched to the characteristic of the line 30 or 40 according to the instruction of the control part 1. Even in case of reception in the equipment 10, the line 30 or 40 to be used by an opponent is identified and a receiving signal is optimumized by the network control part 3. Thus, in an analog and digital mixed line system to use a PBX, satisfactory facsimile communication can be executed without error generation.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a facsimile machine, and particularly to a function of optimizing the level, frequency attenuation characteristics, etc. of transmitted and received signals.

(Prior Art) Currently, facsimile machines connected to analog lines usually have a configuration that enables communication immediately by simply connecting a telephone line. That is, the facsimile machine is equipped with a signal modulator/demodulator and a network control unit, and is capable of performing corrections on the signals sent to or received from the line, such as correction of transmission/reception levels and frequency attenuation characteristics due to the line. The optimum value can be fixedly set for each device depending on the line condition. Normally, the transmission/reception levels and frequency attenuation characteristics are highly dependent on the subscriber's line, so if they are set to values that correspond to the line conditions from the facsimile VTII to the telephone office, it will be easier to use with fewer errors. Can communicate.

However, when the facsimile device is connected to a network using a PBX device (private branch exchange) that connects both a dedicated line and a subscriber line, the settings for optimizing the transmitting and receiving signal characteristics of the facsimile device become difficult. .

In other words, should the transmission/reception levels and frequency attenuation characteristics of the facsimile device be matched to the characteristics of the subscriber's line via the PBX device to the telephone office, or should the PBXviIf
The question arises as to whether it is appropriate to match the characteristics of the dedicated line via which it is connected. In this case, if there is no big difference in the characteristics of the two lines, it will not be much of a problem, but digital pax
When a digital dedicated line is drawn in using 'H, it becomes a very high quality line that does not have any problems such as line loss or attenuation depending on the line frequency, so both times Ii! There will be a big difference in the characteristics between them. Therefore, if the quality of the subscriber's line is quite poor, it becomes a big problem to determine which line the characteristics of the transmitted and received signals of the facsimile machine should be set to match. That is, facsimile 1! If the characteristics of the transmitting and receiving signals at the receiver are set to match the subscriber's line, over-correction will occur when using a digital dedicated line, resulting in data errors on the signal receiving side. On the other hand, if the transmission and reception signal characteristics of the facsimile machine are matched to those of the digital dedicated line, no correction is required, so if the subscriber line is used in this state, data errors will occur on the sending and receiving sides. Therefore, if the transmission/reception signal characteristics of the facsimile machine are matched to the intermediate characteristics of both lines, data errors will occur in each line. Therefore, in order to solve the above-mentioned inconvenience, a method can be considered in which the PBX device performs compensation i in accordance with each line. However, the equipment connected to the PBXIWl is not limited to just facsimile machines; there are also telephones and other communication devices, and if the same line is used by multiple types of terminals, correction is not necessarily required. There are some devices that don't. For this reason, the PBX! ! If a method of supplementing on the A side is adopted, the correction becomes unnecessary for terminals that do not require correction, and there is a disadvantage that efficiency is low.

(Problem to be Solved by the Invention) As described above, when a conventional facsimile device is connected to a system that uses multiple types of lines, such as digital dedicated lines and subscriber lines, the transmitting and receiving signal characteristics of the facsimile device are set once. Since the signal characteristics are fixed, it is extremely difficult to optimize the transmitting and receiving signal characteristics for all lines.The present invention aims to eliminate the above disadvantages. It is an object of the present invention to provide a facsimile apparatus that can optimally set transmission and reception signal characteristics for any of a plurality of lines.

[Structure 1 of the Invention (Means for Solving Problems 11) The present invention provides optimization means for optimizing transmitting and receiving signal characteristics such as level and frequency attenuation characteristics in accordance with line conditions, In a facsimile machine having a function of eliminating errors, a variable setting means selects and sets one from a plurality of optimization characteristics possessed by the optimization means, and a line discrimination means determines the type of line used during communication. and a control means for controlling the variable setting means and setting the optimization characteristic in the optimization means corresponding to the type of line discriminated by the line discrimination means.

(Function) In the facsimile apparatus of the present invention, the line discrimination means discriminates the type of line used during communication and notifies the control means of this. The control means controls the variable setting means 7 to set the optimization characteristics corresponding to the notified type of line in the optimization means. This ensures that the transmitting and receiving signal characteristics of the facsimile machine are the same as each time you use it! Optimization settings are automatically made for each Ia.

<Example> An example of the present invention will be described below with reference to the drawings. 1st
The figure is a block diagram showing an embodiment of a facsimile apparatus of the present invention. 1 is a control unit that controls the entire system, such as transmitting and receiving signal setting control and communication control; 2 is a modem that modulates and demodulates data; 3 is a network control that optimizes line acquisition and release control and transmitting and receiving signal characteristics 4 is an operation section for inputting dial information and displaying the operating mode of the device, 5 is a recording section for recording and outputting received data, 6 is a reading section for reading the transmitted document, and 7 is a network section. The control unit 3 is connected to a PB (not shown).
This is the line that connects to the X-equipment.

FIG. 2 is a circuit diagram showing an example of an optimization circuit for transmitting/receiving signal characteristics provided in the network control unit 3 of FIG. 1. 3
1 is an operational amplifier, 32 is a switch that selects and switches the input impedance of this circuit, 33 is a signal input terminal, 34 is a signal comparison terminal, 711 to Z14 are input impedances,
Zf is the feedback impedance of the operational amplifier 31.

Next, the operation of this embodiment will be explained. First, as shown in FIG. 3, the facsimile machine shown in FIG.
It is assumed that facsimile communication is performed with another facsimile device @70 connected to the subscriber network 50 or with another facsimile device 80 connected to the dedicated network 6G. Note that 10 is the facsimile ' shown in Figure 1.
It is IAM. Here, from the operation section 4 of the facsimile machine 10, for example, the facsimile machine! A telephone number of 110 or 80 is input to the control unit 1. The control unit 1 gives the input telephone number to the network control unit 3 and causes a dial signal corresponding to this telephone number to be sent onto the line 7. PBX device 20
selects either the analog line 30 or the digital line 40 depending on the dial signal input from line I97.

In this case, the control unit 1 of the facsimile machine 10 also
It is possible to identify whether the telephone number input from the operation unit 4 uses the analog line 3G or the digital line 1i140 as follows.

That is, for example, if it is defined that a telephone number starting with O selects an analog line, the control unit 1 will select an analog line F if the input telephone number starts with O! 30,
Those starting with other numbers can be identified as using the digital line 40.

In this way, the facsimile machine 10/fiPBXK machine 20
, facsimile 11! via analog line 30 (or digital line 4G). When the facsimile machine 70 (or facsimile VL machine 80) is connected, the facsimile communication procedure as shown in FIG. The image data is sent to facsimile machine @10 (or facsimile machine 8G). At this time, the facsimile signal is output from the modem 2 to the line 117 via the network control section 3, but the characteristics of the transmitted signal are optimized by the network control section 3 according to the characteristics of either the analog line 30 or the digital line 40. be converted into At this time, the control unit 1 instructs the network control unit 3 which line should be optimized.

The control unit 1 uses the analog line 30 or the digital line 40 depending on the telephone number input from the operation unit 4.
When it is determined whether S1. Notify by S2. here,
The output signal of the operational amplifier 31 is vo, and the input signal is Vl.
Then, there is a relationship of V0=(Z (/Z r ) v +. Therefore, the input impedance Zi jFrZi is changed by the switch 32.

■ By selecting and switching one from ~Zj4. The value of can be changed according to the line condition. Therefore, the switch 32 selects Zi1 when 51=0.52=0 and Zi2 when 51=1.52=0 to switch the input impedance and match the value of vo to the line condition in use. Optimize.

Therefore, the network control unit 3 individually optimizes the transmission signal according to the analog line 30 or the digital line 40.

Next, when receiving the facsimile device @10, the control section 1 determines whether the other party's telephone number is included in the TSI signal during the facsimile control procedure shown in FIG. 40 is used, and this is notified to the optimization circuit shown in FIG. It is assumed that the conversion circuit is used for both transmission and reception.

According to this embodiment, the control unit 1 identifies the type of line used, and controls the optimization circuit in the network system 1 IIPIS 3 based on the identification result to automatically optimize the characteristics of the transmitted and received signals for each line used. can be set as follows. For this reason, P
When this facsimile device is connected to a mixed analog and digital line system using a BX device, good facsimile communication without errors can be performed no matter which line is used.

Although the optimization circuit shown in FIG. 3 of this embodiment shows an example of adjusting the level of the transmitted and received signals, the frequency attenuation characteristics etc. can also be optimized for each line using the same method to achieve the same effect. Obtainable.

[Effects of the Invention] As described above, according to the facsimile apparatus of the present invention,
This has the effect that transmitting and receiving signal characteristics can be optimally set for any of the plurality of connected lines.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the facsimile apparatus of the present invention, and FIG. 2 is a circuit showing an example of an optimization circuit for transmitting and receiving signal characteristics provided in the network control unit 3 of FIG. 3 is a diagram showing an example of a communication system to which the facsimile machine shown in FIG. 1 is connected, and FIG. 4 is a diagram showing an example of a communication procedure of the facsimile machine. 1...Control unit 2...Modem 3...
Network control unit 4...Operation unit 1G...Facsimile device @2G...PBX device 30...Analog line 31...Operation amplifier 32...Kirishiki device

Claims (1)

[Claims] In a facsimile machine, the facsimile apparatus is equipped with an optimization means for optimizing transmitting and receiving signal characteristics such as level and frequency attenuation characteristics according to the line condition, and has a function of eliminating data errors during transmission and reception, wherein the optimization means has a plurality of optimization means. a variable setting means for selecting and setting one of the characteristics, a line determining means for determining the type of line used during communication, and a variable setting means for determining the type of line used during communication; A facsimile apparatus comprising: control means for controlling the variable setting means to set optimization characteristics in the optimization means.