JP2003046600A - Communication device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a communication device that can analyze and recognize transmission terminal identification symbols or the like with optimum signal quality at all times, even when changes take place in the signal quality because a terminal is newly installed and a dial-in communication terminal is moved to a different place or the like. SOLUTION: A first correction circuit 23a is placed among a FAX off relay 18a, a choke coil 16 and a line current detector 17. For example, a test signal from a FAX center is received, the signal is measured by a line monitor 18, a value subtracting base noise from the measurement result is used for a measurement signal. The measurement signal having no deterioration in the signal quality is stored in advance as ideal data, in matching with the capability of the line monitor 19. Then the measured data and the ideal data are compared, with respect to the signal level and the signal time, when the signal level is too high, the gain is decreased; when the signal level is too low, the gain is increased through the correction by the first correction circuit 23a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication device capable of properly analyzing and utilizing a function when receiving a signal having various functions such as a caller number notification function.

[0002]

2. Description of the Related Art Today, a communication device such as a facsimile machine or a telephone is provided with various functions so that these services can be used.

At this time, ITU-T Recommendation T. In 30, the sender's fax number can be included in the sender terminal identification symbol (hereinafter referred to as TSI signal), and various functions are utilized by reading the fax number from the sender terminal identification symbol. It has become so.

For example, there is a dial-in service in which a dial-in communication terminal device (PBX) or the like installed in a hotel or a company can call a terminal telephone set with an extension when an incoming call is received from an outside line. In addition, when communication is performed, communication information such as communication date / time, number of communication, discrimination of transmission / reception, normal completion of communication result, occurrence of error, etc. is saved together with the fax number read from the transmission terminal identification symbol, and is stored as a facsimile communication history. There is a communication management function that can be output on a recording paper or displayed on the display unit at a later date.

[0005]

However, such a function cannot be used until the transmitting terminal identification symbol or the like included in the line signal is properly analyzed and recognized, but a new terminal is installed. When the public line to be connected or the dial-in communication terminal device is moved to a different place, the signal quality such as the signal level changes, and it may not be possible to properly analyze and recognize them.

[0006] As described above, in order to cope with a change in signal quality due to installation of a new terminal, etc., it is necessary for a specialist to analyze the signal quality at the time of installation and set the optimum signal quality, which is troublesome. In addition, the user may not know that the signal quality has changed, and thus the function such as the caller number notification function may not be properly used.

Therefore, the present invention automatically installs a new terminal, a public line to be connected, a dial-in communication terminal device which is moved to a different place, or the like, so that the signal quality is automatically changed. It is an object of the present invention to provide a communication device that is corrected and can always analyze and recognize a transmission terminal identification symbol and the like in an optimum state.

[0008]

In order to solve the above problems, the invention according to claim 1 analyzes an incoming line signal and determines whether the signal is accompanied by various functions such as a caller number notification function. In a communication device that determines whether or not the signal quality such as the signal level of the line signal is measured in the communication device that operates according to the determination result, the line signal data having the optimum signal quality for analysis is used as the ideal data. Memorize in advance,
And a correction unit that determines a correction condition by comparing the ideal data with the data measured by the measurement unit and corrects the received line signal according to the correction condition to obtain a signal of constant quality. For example, even if a new terminal is installed, the public line to be connected or the dial-in communication terminal device moves to a different location, and the signal quality changes, the deterioration of the signal quality is automatically corrected. By making it possible to analyze the sending terminal identification symbol etc. in the optimum state,
It is characterized in that it can be recognized.

According to a second aspect of the present invention, the measuring means measures the influence on the signal quality by the subordinate connection terminal to which the subordinate connection is made, and the correcting means decides the correction condition based on the measurement result and the ideal data and outputs the signal. Is corrected.

According to a third aspect of the present invention, the measuring means measures the signal quality at every predetermined time and stores it in a database, and the correcting means deviates the accumulated data from the predetermined range with respect to the ideal data. If it is determined that the signal has a certain quality, the correction condition is reset based on the ideal data and the accumulated data so that a signal of constant quality can be obtained.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a schematic configuration of a facsimile compound apparatus according to the present invention.

The facsimile composite apparatus has a CPU 1,
A ROM 2, a RAM 3, a work RAM 4, an operation unit 5, a reading unit 6, a recording unit 7, an input / output unit 8, a compression / expansion unit 9, an image processing unit 10, a modem unit 11 and the like are provided, and these are connected via a bus. ing.

The CPU 1 carries out the control of all the constituent elements of the apparatus and the arithmetic judgment necessary for it as a work area of the WorkRAM 4, and the processing procedure at that time is stored in the ROM 2. The RAM 3 is a memory for accumulating various information, and is backed up especially by a primary battery so that the contents are retained even when the power is turned off.

The operation section 5 is composed of an operation panel 5a and an operation controller 5b. The operation panel 5a is provided with a ten-key for designating a destination telephone number, a start key, a one-touch dial key and various other keys and a liquid crystal element. And the like are provided to display the operating state of the device and various messages to be notified to the user, and the operation controller 5b accepts and controls the display of various key inputs.

The reading unit 6 is composed of a scanner 6a and a reading controller 6b, and the scanner 6a uses a predetermined reading line such as 3.85 lines / mm, 7.7 lines / mm, 15.4 lines / mm. This is for obtaining read image information at a density, and the read controller 6b controls the scanner 6a, and the read image information is sequentially accumulated in a line buffer and transferred to a required device.

The recording unit 7 includes a plotter 7a and a recording controller 7
b for recording and outputting the received image information in accordance with its linear density, and recording / copying the image information read by the reading unit 6 in accordance with its linear density, and a management report. Also used for the output of.

The input / output unit 8 is composed of an input / output port 8a and an input / output controller 8b. The input / output port 8a has a recording paper remaining amount detecting sensor, various door open / close detecting sensors,
Various devices such as a temperature sensor for heater temperature in the plotter 7a and various motors are connected.

The compression / expansion unit 9 is composed of a compression / expansion controller 9a for performing compression / expansion suitable for filing and a large-capacity memory 9b for storage used for storing these data for the filing function of copy data. ing.

The image processing unit 10 is a FAX image processor 10 for performing image processing of FAX data and FAX compression / decompression.
a or a locally connected large-capacity memory 10b for the SAF accumulation function.

The modem section 11 is composed of an analog line interface 11a and a G3FAX modem 11b. The analog telephone network and the like are connected to the G3FAX modem 11b via the analog line interface 11a, and the F3
AX communication is performed.

Then, the entire apparatus receives power supply from the AC cord 12, and the DC power supply unit 13 generates DC power supply for use in the facsimile compound apparatus.

FIG. 2 shows an analog line interface 1
It is a block diagram which shows the detailed structure of 1a. The analog line interface 11a includes a connection point 14 between a telephone network connection point 14a which is a connection point with a telephone network and an external telephone connection point 14b which subordinately connects an external telephone.

Immediately after the telephone network connection point 14a, a lightning surge protector 15 and a choke coil 16 for removing a lightning surge or noise signal of an interfering signal that enters through the telephone network are provided, and a line is connected to the choke coil 16. A line current detector 17 is provided to detect whether or not the line has been closed.

A first correction circuit 23a (23), which will be described later, is connected to the line current detector 17 and the choke coil 16, and the output thereof is a FAX off-hook relay 18a (1).
8) is connected.

The FAX off-hook relay 18a includes
The line connector 20, the communication transformer 21, and the analog front end 22 are sequentially connected, and the G3 FAX modem 11b is connected to the analog front end 22.

A line monitor 19 and a second correction circuit 23b (23) are connected to the FAX off-hook relay 18a, and an external telephone connection point 14b for subordinately connecting an external telephone is connected to the second correction circuit 23b. It is connected.

Then, the detection of the ringing signal or the like in the standby mode is performed by F
Line monitor 1 connected to AX off-hook relay 18a
9. When the call signal is detected, the FAX off-hook relay 18a is switched to FAX.

As a result, the line connector 20 and the communication transformer 21 go off-hook, and the FAX signal and the like can be communicated with the G3 FAX modem 11b through the analog front end 22.

The calling signal is discriminated by the logic of the input / output controller 8b and can be recognized by the CPU 1.

As described above, the first correction circuit 23a is provided between the FAX off-hook relay 18a and the choke coil 16 or the line current detector 17, and the external telephone connection point 14b and the FAX off-hook relay 18a or the line monitor are connected. 1
A second correction circuit 23b is provided between the first correction circuit 23 and the second correction circuit 23.

The first correction circuit 23a and the second correction circuit 2
Reference numeral 3b is for correcting a signal having an appropriate signal quality by adjusting the level of the line signal input to the G3 FAX modem 11b or the external telephone.

However, the correction circuit 23 is provided with a through mode in which the input line signal is output as it is (no correction processing is performed). In the through mode, deterioration of the signal strength due to the correction does not occur. It has become. Therefore, in this case, the same operation as the normal analog line interface 11a is performed.

With such a configuration, the correction circuit 2 for the deterioration of the signal quality due to the exchange equipment, the ISDN terminal adapter, or the like.
A case in which various functions (for example, caller number notification, etc.) are corrected so as to be surely used by making a correction according to 3 will be described.

In the following description, the caller number notification function will be described as an example of such a function. At that time, the own telephone number is registered in the facsimile machine. It goes without saying that the functions are not limited and various functions such as the unwanted fax prevention function can be used.

That is, these functions can be properly used only when the receiving side terminal can correctly analyze and recognize the function information contained in the transmitted line signal, and the received line signal is deteriorated. Since it becomes difficult to correctly perform such analysis and recognition, in such a case, it is preferable to perform signal correction by the correction circuit according to the present invention.

The line monitor 19 divides the line signal into fine frequency bands Δf as shown in FIG. 3, and measures the signal level Vd of the frequency band concerned by an analog LSI (not shown).
Is provided.

This measurement can be performed every unit time Δt, and specifically, the unit time Δt is determined from the data rate according to the communication regulations in the caller number notification function or the like. Needless to say, if the unit time Δt is set to a shorter time interval, the measurement accuracy can be improved.

Then, the line monitor 19 is started in the standby state, the signal at this time (the signal shown by the dotted line in FIG. 3) is measured, and this is stored in the SRAM 3 as the base noise. When measuring the base noise, the measurement unit time Δt may be set to, for example, 300 ms, and the number of times of measurement may be set to once.

Next, facsimile reception is performed from the partner station for which the caller number notification function is set. As such a partner station, a FAX opened for user maintenance
Centers etc. can be mentioned. In this FAX center, when the caller number notification function is set and a telephone call is made, a test facsimile transmission is performed from the FAX center to the telephone number notified at that time.

At this time, if a FAX center installation place nationwide is checked from the instruction manual or the like and a FAX center near the user's facsimile machine is selected, adverse effects such as deterioration of signal quality due to an intervening exchange are eliminated. There is an advantage that will be possible.

Of course, as a method of removing the deterioration of the signal quality by such an exchange, the data of the main station and the terminal station may be collected and stored in advance, and the actual line signal may be corrected based on this.

Since a known telephone number (caller's number) is notified to the line signal (solid line in FIG. 3) from the FAX center, this line signal is monitored by the line monitor 19 while the correction circuit 23 is in the through mode. The measurement signal is a value obtained by subtracting the base noise from the measurement result. Note that FIG. 4 shows a table of the level Vd of the line signal measured by the line monitor 19.

On the other hand, the measurement signal when the signal quality is not deteriorated is stored in advance as ideal data according to the capability of the line monitor 19.

Then, the quality of the measured data and the ideal data is compared in terms of signal level, signal time, etc., and if the signal level is too high, the gain is lowered, and if it is too low, the gain is increased by the first correction circuit 23a. to correct.

When the level correction is performed, the signal time is often improved accordingly, but if the signal time or the like still has inadequacy, adjustment is made by a resonance circuit, a filter circuit or the like not shown. To do. Of course, the signal time may be adjusted from the beginning by using the resonance circuit, the filter circuit, or the like.

The line connector 20 and the communication transformer 21 are also provided.
Deterioration of the signal quality due to the above is removed by performing correction by the second correction circuit 23b.

At this time, ideal data is measured and stored in advance by experiments or the like. At that time, it is preferable to use ideal data by experiments or the like assuming a state in which a general telephone or the like is connected.

Then, the gain is set by comparing the actually measured data and the ideal data, and the gain is corrected.

As described above, since it is possible to eliminate the deterioration of the signal quality due to the device interposed between the communication carrier facility such as the exchange and the facsimile machine and the deterioration of the signal quality due to the internal configuration of the device, for example, the input It is possible to prevent the inconvenience that the caller number notification signal or the like cannot be normally analyzed and recognized due to the excessively high level of the line signal, and the function can be used.

Next, a second embodiment of the present invention will be described with reference to the drawings. The same components as those of the above-described embodiment are designated by the same reference numerals and the description thereof will be omitted as appropriate.

In the invention according to the present embodiment, the capability of the caller number notification function in the subordinate connection terminal such as an external telephone subordinately connected to the external telephone connection point 14b is enhanced, as shown in FIG. Is provided with a pseudo signal transmitter 24 for transmitting a pseudo caller number notification signal in parallel with the line monitor 19, and the FAX off-hook relay 18a is provided with a relay 18b.
Are connected.

The pseudo signal transmitter 24 can adjust the level of the signal and the like, and adjusts the level so as to cancel the influence of the first correction circuit 23a set based on the ideal data.

By switching the relay 18b, the subordinate connection terminal and the pseudo signal transmitter 24 are directly connected.

With such a structure, the pseudo caller number signal is transmitted from the pseudo signal transmitter 24, and the signal level and the like are measured by the line monitor 19.

Then, the ideal data and the measured data are compared, and the second correction circuit 23b is adjusted based on the comparison. It is preferable that the measurement / adjustment be repeated a plurality of times in order to enhance the adjustment system, and if the sending of the pseudo caller number signal and the measurement are performed in parallel, the adjustment becomes easy.

As described above, adjustment settings can be made according to the characteristics of the subordinate connection terminals that are subordinately connected, and the ability of analysis and recognition such as the caller number notification function in the subordinate connection terminals can be improved.

Next, a third embodiment of the present invention will be described with reference to the drawings. The same components as those of the above-described embodiment are designated by the same reference numerals and the description thereof will be omitted as appropriate.

It is expected that the switching equipment on the side of the communication carrier will be changed, the dial-in communication terminal device itself or the connection point will be changed, and the subordinate connection terminal will be changed. If such a change is made, a correction circuit, etc. If the setting in is left as it is, the analysis and recognition such as the caller number notification function may not be properly performed.

Generally, the user can know the change of the subordinate connection terminal, but often cannot know the change of the switching equipment, the change of the dial-in communication terminal device itself or the connection point.

Therefore, in the invention according to the present embodiment, the presence or absence of these changes is automatically detected periodically to optimize the correction condition in the correction circuit or the like.

For this reason, a certain permissible value (a deviation from the ideal data) is set in advance for the ideal data so that the line signal or the like is constantly monitored.

When the call signal is detected, the line monitor 19 measures the line signal to measure the caller number notification signal.

At this time, since the influence of the dial-in communication terminal device and the ISDN terminal adapter is eliminated by the correction circuit, the measured data should be ideal data.

However, as described above, if the switching equipment, the dial-in communication terminal device itself or the connection point is changed, or the subordinate connection terminal is changed, the measured data and the ideal data become different, and the time is changed. These may be different depending on the belt.

In preparation for such a case, the difference between the measured data of the line signal accompanied by the caller number notification signal and the like and the ideal data is accumulated every predetermined time, and the difference is stored in a database.

If this data exceeds the preset allowable value, the settings of the correction circuit and the like are reset according to the procedure described in the above embodiment.

Further, when the accumulated data has a regularity in the time exceeding the allowable value, at that time zone, the setting of the correction circuit and the like is reset according to the procedure described in the above embodiment. , After the time has elapsed, the original settings are restored.

As a result, when the switching equipment, the dial-in communication terminal device itself or the connection point is changed, or the subordinate connection terminal is changed, the measured data becomes different from the ideal data. Even if a different case occurs, this state can be appropriately dealt with, so that analysis and recognition of the caller number notification function and the like can always be performed, and convenience is improved.

[0069]

As described above, according to the invention of claim 1, the deterioration of the signal quality due to the switching equipment to be connected, the ISDN terminal adapter or the like is corrected, so that the caller number notification function or the like can be achieved. Functions can be effectively used.

According to the second aspect of the present invention, since the deterioration of the signal quality due to the subordinate connection terminal subordinately connected is measured and corrected, the caller number notification function is provided even if the subordinate connection terminal is changed. Each function such as can be effectively used.

According to the third aspect of the present invention, the signal quality is monitored every predetermined time, and if the preset ideal data deviates from the predetermined range, the correction condition is set accordingly. Therefore, even if the signal quality changes due to the exchange of the exchange equipment or the like, it is possible to appropriately cope with the change and the respective functions such as the caller number notification function can be effectively used.

[Brief description of drawings]

FIG. 1 is a block diagram showing a schematic configuration of a facsimile apparatus applied to an explanation of an embodiment of the present invention.

FIG. 2 is a block diagram showing a schematic configuration of an analog circuit interface applied to the description of the first embodiment of the present invention.

FIG. 3 is a diagram showing a graph of measurement results of line signals.

FIG. 4 is a diagram showing a table of measurement results of line signals.

FIG. 5 is a block diagram showing a schematic configuration of an analog circuit interface applied to the description of the second embodiment of the present invention.

[Explanation of symbols] 1 CPU 2 ROM 3 RAM 4 WorkRAM 8 I / O section 8a I / O port 8b I / O controller 11 Modem section 11a Analog line interface 11b G3 FAX modem 14 connection points 14a Telephone network connection point 14b External telephone connection point 19 Line monitor 23 Correction circuit 23b Second correction circuit 23a First correction circuit 24 Pseudo signal transmitter

Claims (3)

[Claims] 1. A communication device, which analyzes a received line signal to determine whether or not the signal has various functions such as a caller number notification function, and performs an operation according to a result of the determination, Measuring means for measuring the signal quality such as the signal level of the line signal, and the data of the line signal when it has the optimum signal quality for analysis are stored in advance as ideal data, and the ideal data and the data measured by the measuring means are stored. And a correction unit that determines a correction condition by comparing the received signal and a line signal received according to the correction condition so that a signal of a constant quality can be obtained. 2. The measuring means measures the influence on the signal quality by a subordinate connection terminal to which the subordinate connection is made, and the correcting means corrects the signal by determining a correction condition based on the measurement result and the ideal data. The communication device according to claim 1, wherein: 3. The measuring means measures the signal quality at predetermined time intervals, accumulates the signal quality and stores it in a database, and the correcting means deviates from the predetermined range in the accumulated data with respect to the ideal data. The communication device according to claim 1 or 2, wherein when it is determined that the correction condition is reset based on the ideal data and the accumulated data, a signal of constant quality is obtained. .