JPH0614169A - Fax machine - Google Patents

Abstract

(57) [Abstract] [Object] The present invention relates to a facsimile apparatus having a shortened control procedure for timely shortening a transmission control procedure exchanged between the facsimile apparatuses prior to image signal transmission,
In particular, it is an object of the present invention to provide a facsimile apparatus in which the control procedure conforming to the CCITT and T30 standards and the shortening control procedure can be efficiently and surely selected without making a mistake. According to the present invention, a means for storing at least destination data that can be subjected to shortened transmission control (hereinafter referred to as shortened destination data) and a CCITT based on a search result from the storage means.
(International Telegraph and Telephone Advisory Committee) A means for selectively transmitting a CNG signal (calling station identification signal) conforming to T30 and an original non-conforming CNG signal to the called party, and any one of the CNs.
A means for discriminating whether or not the called side is a compatible machine is provided based on a response signal obtained from the called side by transmitting the G signal, and the contents stored in the storage means are appropriately stored based on the signal from the discriminating means. It is characterized by being rewritable.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facsimile apparatus having a shortening control procedure for timely shortening a transmission control procedure exchanged between facsimile apparatuses prior to image signal transmission.

[0002]

2. Description of the Related Art Conventionally, in order to increase the transmission speed of a facsimile apparatus as well, the transmission speed of a modem is increased and the transmission rate of an image signal is improved by improving the compression rate of image information. . In this type of facsimile apparatus, in order to enable transmission / reception of signals between different models, a control procedure system based on the CCITT Recommendation T30 standard is adopted prior to transmission of image signals.

To explain the procedure based on the sequence shown in FIG. 7, first, a calling side and a called side are connected by a line, and then a calling station identification signal CNG is sent from the calling side to the called side. Then, from the called side to the calling side, the called terminal identification signal CE is sent.
After D is sent for 2.6 to 4.0 seconds, an initial identification signal of about 2 seconds including the nonstandard device signal NSF, the called terminal identification signal CSI and the digital identification signal DIS is further sent. On the other hand, the calling side, after detecting these signals, issues a reception command signal of about 2 seconds including the non-standard device setting signal NSS, transmitting station identification signal TSI, and digital command signal DCS, and then trains for about 1 or 5 seconds. After transmitting the check signal TCF, the receiver shifts to the transmission of the image signal after waiting for the reception preparation confirmation signal CFR of about 1 second from the receiver.

Therefore, according to the CCITT recommendation, various control procedure signals are transmitted and received from the line connection until the start of the transmission of the image signal, and these are performed at the transmission speed of 300 dpi based on the low speed modem. It takes about 10 to several seconds until the image signal starts. Therefore, as described above, even if the transmission time of the image information is shortened by increasing the speed of the modem, etc., it is only a preparatory work and an extremely long time for transmitting and receiving the control procedure signal. For example, in recent years, the time for transmitting one A4 standard document has been shortened to about 10 seconds. Therefore, when only one document is transmitted, the ratio of the procedure control time to the total required time Has reached 60% or more, and as the number of transmissions and receptions increases, it is a wasteful time that cannot be ignored in terms of communication costs.

In order to solve such a drawback, a non-standard procedure shortening signal HUC is added to the control procedure signal CNG from the calling side by utilizing the non-signal section from the called side to the CED signal transmission after the line connection. A signal is sent and the called party sends the HU
In the case where the C signal can be identified, the time is shortened by sending the control procedure signals of TCF, TSI, and NSS from the calling side as a high-speed modem signal all at once in response to the response signal (Japanese Patent Application Laid-Open No. 2000-242242). (Sho 61-263359), or after connecting the line, send a binary procedure signal to the called party, and as soon as the called party receives the binary procedure signal, the initial identification signal is immediately transmitted at the speed used for transmitting the image signal. A technique has been proposed in which the information is returned and the control procedure is thereby shortened. (JP-A-1
-186044)

[0006]

However, in any of the above-mentioned prior arts, based on whether or not the identification signal for shortening the control procedure is responded to the called side and the identification signal is identified by the called side, Although each shifts to its own shortened mode or high-speed mode, since the line used in the above-mentioned facsimile is a public line, noise or the like is liable to enter, and therefore, the shift to the shortening procedure is made by mistake, or Although it is a model that can be shifted to the shortened procedure, it is often transmitted by the normal control procedure, and in particular, in the former case, retransmission is forced.

As a technique similar to the present invention, a rewritable memory in which transmission parameters used at the time of transmission with a facsimile machine on the other side (callee) are stored in association with destination data of the facsimile machine on the other side. Is provided
A technique has been proposed in which each time destination data is input, a transmission parameter corresponding to the destination data is read from the memory unit and transmission is performed with the facsimile on the other side based on the transmission parameter. (Japanese Patent Laid-Open No. 62-225068)

[0008] Although the above-mentioned technique does not mention that the transmission parameter includes the shortened control procedure, it is easily understood by those skilled in the art that such a configuration is made, and in the case of such a configuration, (Although such a configuration is not disclosed in reality), the above shortcomings are eliminated because the shortening control procedure can be automatically selected based on the destination data regardless of the noise on the public line.

However, even when the above configuration is adopted, the same problem as described above occurs when the model or line is changed. Moreover, facsimiles are usually installed in offices by leasing contracts, and since technological innovation is intense, device exchanges are frequent, and since the exchanges are performed without notice to the other party. In addition, there is no way to change the contents of the memory storing the shortening control procedure for the other party. This is the same when there is a line change,
In particular, when not only the movement of the facsimile in the office but also the change of the local area code in Tokyo in recent years, all the memories cannot be used, which is a big problem.

The present invention has been made in view of the above-mentioned drawbacks of the prior art.
An object of the present invention is to provide a facsimile apparatus configured so that a control procedure based on the CCITT and T30 standards and the shortened control procedure can be efficiently and reliably selected without causing a mistake. Another object of the present invention is to provide a facsimile apparatus capable of performing transmission control while constantly updating destination data that can be shortened.

[0011]

SUMMARY OF THE INVENTION The present invention provides a means for storing at least destination data that can be subjected to abbreviated transmission control (hereinafter referred to as abbreviated destination data), and CCITT (International Telegraph and Telephone) based on a search result from the storage means. Advisory Committee) C30 signal conforming to T30 (calling station identification signal), and means for selectively transmitting a non-conforming original CNG signal to the called side,
A means for discriminating whether or not the called side is a conforming machine is provided based on a response signal obtained from the called side by transmitting one of the CNG signals, and the storage means of the storage means is provided based on the signal from the discriminating means. It is characterized in that the stored contents can be rewritten as appropriate.

The original CNG signal is CCITT.
It is preferable to insert and synthesize an FSK-modulated identification signal between CNG signals conforming to the T30 standard of the above, so that it is not necessary to shorten the transmission time of the CNG signal itself, and it is based on CCITT. Since the modulation method of the low-speed modem section is FSK, the composite CNG signal can be transmitted from the low-speed modem section in the same manner as the standard-compliant CNG signal.

Further, although it is possible to store all the destination data in the storage means and add the conforming machine code and the non-conforming machine code to each of the destination data, preferably the shortened transmission control is possible. It is preferable that only the destination data is stored and the data that is not stored is determined to be a non-conforming machine because the memory saving can be achieved.

[0014]

Next, the operation based on the technical means will be schematically described with reference to FIG. First, the memory content in the storage means is searched based on the destination data dialed manually or by using the shortened number (STEP 1), and when the data is the shortened destination data, the unique CNG signal is transmitted. (STEP2) If the response signal from the called side is a conforming machine, the procedure shifts to the shortening control procedure (STEP3). On the other hand, if it is determined by the response signal that the machine is a non-conforming machine, the CCITT recommendation is usually followed. The transmission procedure is changed to. (STEP 4) That is, the CNG signal conforming to the CCITT recommendation is transmitted by the above transition, and the CCITT-compliant initial identification signals NSF, CSI, DIS from the called side are obtained.

According to the second aspect of the invention, the procedure signal (generally NSF) to which the model name code or the like is added is discriminated from the response signal to determine whether or not the machine is a compatible machine again. If it is determined that the machine is not a machine, the destination data is erased or rewritten with a nonconforming machine code.
(STEP5)

That is, since the malfunction is likely to occur due to the influence of the line noise etc. when shifting to the shortening procedure, even when the shortening procedure determines that the machine is not suitable, it is adapted at the stage of shifting to the CCITT-compliant communication procedure again. Since it is configured to check whether it is a machine or not, and rewrite or erase to the storage unit, erroneous rewriting / erasing due to the line noise can be avoided. The destination data may be erased or rewritten to a non-conforming machine code once at STEP 6, and the confirmation may be made again at STEP 5.

On the other hand, when the destination data is not the abbreviated destination data by the search of the storage means, the normal transmission control conforming to the CCITT recommendation is performed, and the model name code or the like is obtained from the response signal such as the CCITT-compliant response signal NSF. Is added to the procedure signal (generally NSF), the response signal is used to determine whether the machine is a compatible machine, and if the machine is a compatible machine, the destination data corresponding to the recording unit is added. (ST
EP7)

Therefore, according to such a technical means, in the case of a called terminal whose model for which communication is performed for the first time is unknown, the called signal is sent in accordance with the communication procedure conforming to the G3 high-speed facsimile standard, and the response signal returned from the called side. By recording whether or not it is a compatible model based on the above, and recording it in the storage means, it is possible to automatically shift to the shortening procedure from the next communication, which leads to a saving in transmission speed.

In addition, even after the shift to the shortening procedure, the transmission is performed while always judging whether or not the machine is a conforming machine.
Even if the called side switches to a non-conforming machine due to model change, etc., this can be immediately discriminated and the memory contents in the storage means can be automatically rewritten or erased while being able to shift to the normal procedure. The data may be stored automatically in the storage means. This makes it possible to easily deal with the case where the called party changes the model or the facsimile in the office as well as the local area code without notice.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be exemplarily described in detail below with reference to the drawings. FIG. 1 is a schematic block diagram of a facsimile apparatus according to an embodiment of the present invention. In the figure, reference numeral 1 is a computer section, a central processing unit (CPU) 1A for controlling the facsimile apparatus, and a program storing R.
An OM 1B, a destination data and a RAM 1C which functions as a storage unit to which a discrimination signal for discriminating whether or not the called side corresponding to the data is a compatible model are added.

Reference numeral 2 is a CNG signal in a normal procedure shown in the CCITT standard and a CNG signal transmitting section which can transmit a unique CNG signal (hereinafter referred to as KCNG signal) different from the CNG signal, and 3 is a line including an automatic dial function. An automatic transmission unit (NCU) that controls functions such as connection, 4 is a shortened procedure transmission unit for performing communication in a unique procedure when the other party is found to be a compatible machine, 5 is a reading unit for reading a document, and 6 is A recording unit for recording on a document, 7 is a detection unit for detecting a standard-compliant CNG signal sent from a facsimile machine on the calling side and a KCNG signal described later, and 8 is adapted based on a response signal from the called side. It is a compatible machine discrimination unit that discriminates whether or not it is a model.

Reference numeral 9 is a modem control unit for modulating / demodulating image signals and the control procedure signal, and 10A and 10B are a high-speed modem unit and a low-speed modem unit connected to the modem control unit. The high-speed modem unit 10A is CCITT recommended. According to the method, the modulation method is QAM or PSK, and the transmission rate is 9600.
bps, 7200bps, 4800bps, 2400b
It is ps. The low-speed modem unit 10B has a modulation system of FSK and a transmission speed of 300 bps.

Reference numeral 11 is a handset for transmitting / receiving voice, 12 is a ringer for generating a ringing tone of a telephone, 13 is a telephone line for transmitting / receiving voice signals and facsimile signals, and 14 is a code / code for encoding transmitted / received data. This is a decoding unit.

FIG. 3 shows an example of the KCNG signal used in this embodiment. As shown in (b), the CNG signal conforming to the standard includes two FSK signals having a pulse width of 0.5 seconds for 3 seconds,
I set it after a while. Therefore, KCNG of this embodiment
As shown in (a), the FSK-modulated identification pulse signal is inserted in the pulse output interval of 3 seconds.

FIG. 4 shows a CNG signal and KCN compliant with the above standard.
The internal configuration of the detection unit 7 for detecting the G signal is shown. When the KCNG signal or the CNG signal is input into the detection unit 7, in the case of the KCNG signal, the bandpass filter BP2
After passing through, and after being demodulated by the FSK demodulation circuit 16 at the next stage, it is determined whether or not the demodulated signal content matches a predetermined code, and when it completely matches the identification code, the called side Move to shortened control procedure.

On the other hand, when the called side receives the CNG signal by T30 of CCITT, the CNG signal does not pass through the band pass filter BP2 but passes through BP1. Therefore, it is recognized that the received signal is the CNG signal. Then, the normal transmission control procedure based on the CCITT recommendation shown below is performed.

As a response signal for discriminating the compatible model from the called side, an NSF or NSS signal is generally used. The frame structure is shown in FIG. NSF or N
The SS signal generally has a length of 40 bytes as shown in (b), and the country code, the model code, the manufacturer code, the model code, etc. are put in the SS signal and transmitted to the calling side, and the calling side transmits the code. It was identified and displayed on the display etc. Therefore, according to the signal, the compatible machine discriminating unit 8 can easily determine whether the model code or the compatible machine model.

Further, as shown in (a), a bit shortened frame structure may be used. For example, a shortened frame structure having a model code and a minimum signal including a country code and a maker code is used. The shortened byte data may be transmitted to the calling side, whereby the calling side reads the model name from the content of the received NSS signal, displays it on the display unit of the facsimile machine, and determines the compatible machine. The unit 8 can easily determine whether the model code is the compatible model or not, and the transmission time can be shortened. According to such a signal, since the byte is shortened, it can be easily discriminated from a normal signal, and it is possible to discriminate whether or not the signal itself is a compatible model.

Next, the operation procedure of the above embodiment will be described with reference to the sequence of FIG. 6 and the flow chart showing the operations of the calling side and the called side shown in FIG. First, the memory content in the storage means 1C is searched based on the destination data dialed by using the abbreviated number or the like in the manual or automatic transmission device, and when the data is the abbreviated destination data, the composite CNG signal is generated. Send out. (STEP 1) The called side enters the receiving state after line connection, and when the CNG signal is received from the calling side, the combined CN is detected by the CNG detector.
It is determined whether or not it is a G signal, and in the case of a composite CNG, the process shifts to the shortening control procedure and the NSS signal containing the model identification name is transmitted, and at the same time, the image signal reception state is entered.

Then, the calling side receives a signal, and if it is an NSS signal, it is determined that the machine is a compatible machine, and the state shifts to an image signal transmission state based on the high speed modem. (STEP2) On the other hand, when the response signal is the CED signal, the compatible machine determining unit 8 determines that the machine is a non-compatible machine (STEP3), and C
The normal transmission procedure conforming to the CITT recommendation is entered.
That is, the CNG signal conforming to the CCITT recommendation is transmitted by the above transition and the CCITT conforming called terminal identification signal CED is transmitted from the called side, and then NSF, CSI, DIS are further transmitted.
An initial identification signal consisting of

Then, the NSF signal to which the model name code or the like is added is discriminated from the response signals to determine again whether or not it is a conforming machine (STEP 7). At the same time as erasing or rewriting to a non-conforming machine code (STEP 5), a transition is made to the image signal transmission state based on the low speed modem.

On the other hand, when the destination data is not described as the shortened destination data by the search of the storage means 1C, the CNG signal conforming to the CCITT recommendation is sent to the called side. (STEP4) On the called side, C is received when the CNG signal is received from the calling side.
If the NG detector 7 determines whether the CNG signal is a composite CNG signal, and if it is determined that the CNG signal is a standard-compliant CNG signal, CE is determined.
The D signal is transmitted, and the NSF, CSI, and DIS signals are transmitted to the calling side. (STEP 4) Then, it is judged from the NSF signal whether or not it is a compatible machine, and if it is judged as a compatible machine, the destination data is rewritten to a compatible machine code and the image signal is sent out based on the high speed modem. Transition. (STEP6)

[0033]

As described above, according to the present invention, CCIT
Facsimile capable of efficiently and reliably selecting the control procedure conforming to the T and T30 standards and the shortening control procedure without causing a mistake and performing transmission control while constantly updating destination data that can be shortened. It has a remarkable effect such as the transmission system of the device.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a facsimile apparatus according to an embodiment of the present invention.

FIG. 2 is a flow chart diagram showing signal flows of a calling side and a called side according to an embodiment of the present invention.

FIG. 3 is a composite CNG signal (a) used in the embodiment and a CNG signal (b) shown in T30 of CCITT.

FIG. 4 shows a CNG detector chart as a means for discriminating a composite CNG signal and a CNG signal.

FIG. 5: Frame structure of response signal of called party

FIG. 6 is a sequence diagram of a shortening control procedure in the embodiment of the present invention.

FIG. 7 is a sequence diagram of a control procedure shown in T30 of CCITT.

[Explanation of symbols]

 1C storage means 7 CNG transmission section 8 compatible machine discrimination section KCNG unique CNG signal 10 CNG identification means

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[Procedure amendment]

[Submission date] August 19, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Brief description of the drawing

[Correction method] Change

[Correction content]

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a facsimile apparatus according to an embodiment of the present invention.

FIG. 2 is a flow chart diagram showing signal flows of a calling side and a called side according to an embodiment of the present invention.

FIG. 3 is a composite CNG signal (a) used in the embodiment and a CNG signal (b) shown in T30 of CCITT.

FIG. 4 shows a CNG detector chart as a means for discriminating a composite CNG signal and a CNG signal.

FIG. 5: Frame structure of response signal of called party

FIG. 6 is a sequence diagram of a shortening control procedure in the embodiment of the present invention.

FIG. 7 is a sequence diagram of a control procedure shown in T30 of CCITT.

[Explanation of Codes] 1C Storage Means 7 CNG Transmitter 8 Compatible Machine Discrimination Unit KCNG Unique CNG Signal 10 CNG Identification Means

Claims (3)

[Claims] 1. Means for storing destination data (hereinafter referred to as shortened destination data) capable of at least shortened transmission control,
A CNG signal (calling station identification signal) conforming to CCITT (International Telegraph and Telephone Consultative Committee) T30 and an original CNG signal not conforming to the CCITT (International Telegraph and Telephone Consultative Committee) are selectively transmitted to the called side based on the retrieval result from the storage means. Means and means for determining whether or not the called side is a compatible machine based on a response signal obtained from the called side by transmitting one of the CNG signals, and the means based on the signal from the judging means. Facsimile apparatus characterized in that the storage contents of the storage means can be appropriately rewritten or erased 2. The facsimile apparatus according to claim 1, wherein even if the shortening procedure side discriminates a non-conforming machine, it is possible to discriminate whether or not the machine is a conforming machine at the stage of transition to the CCITT-compliant communication procedure again. 3. The unique CNG signal is CCITTT.
The facsimile apparatus according to claim 1, wherein the facsimile apparatus is a composite CNG signal in which an identification signal modulated by FSK is inserted between CNG signals conforming to the 30 standard.