JPS5970363A - Processing system of facsimile control signal - Google Patents

Abstract

PURPOSE:To attain mutual communication with a maximum function without remolding an existing facsimile device, by splitting the inside of a non-standard device (NSF) frame into sub-fields and expanding sequentially the sub-fields with an extended bit. CONSTITUTION:An initial discriminating signal from an opposite facsimile device is inputted to a demodulating circuit 5 via a network controller 3, the signal is converted into a data signal and stored once in a receiving data buffer 6. A sub-field separating circuit 7 reads out an NSF frame from the said stored data signal and separates each sub-field. Every time the sub-field is separated, a sub- field number count circuit 8 is started and the number (k) of the sub-fields in the NSF frame is obtained. When the number of received sub-fields is (k) and the (k) is less than L, mutual communication is attained by using the information in the final sub-field Mk in the NSF frame and when the (k) is L or over, it is done by using the information in the sub-field ML.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is applicable to communication devices, such as facsimile machines, equipped with non-standard functions in addition to internationally defined standard devices, when they communicate with each other via a line. The present invention relates to a facsimile control signal processing method for analyzing and processing the contents of control signals indicating standard functions.

For facsimile machines using binary means, CCI TT Recommendation T, using a Digital Identification Signal (DIS)
30 (ccITT Recommendation: Yellows Tsuk Volume 7, No. 2
When performing mutual communication in the standard mode specified in Volume S and T Series Recommendations, 1980), optional signals (control signals that are not required to be provided) of non-standard equipment control signals (NSI) are used for mutual communication. may be done.

Therefore, the format of the control signal for initial identification is NSF/csr.
- It is recommended to use a format in which three control signals called DIS are connected. Here, the called terminal identification signal <
csr) is an optional signal and is used to confirm the called station by the number assigned to the called station or the telephone number. Therefore, all 7 Akunmiri devices are
Of the two control signals, only the DIS signal must be provided as an essential signal.

Since the DIS is a control signal indicating that the facsimile device has a standard CCITT function, the assignment of signals to mutual communication functions is clearly defined in advance, and the analysis process upon reception is uniquely determined. However, when using non-standard equipment control signals (NSF), there are no regulations regarding the human allocation of the field CFIF, which contains information for facsimile/millimeter control, and there are no regulations regarding human allocation for new functions or analysis processing methods in the future. It is not realistically possible to specify this.

Therefore, J% new functions that are not standard CCITT functions
(iii. If you have a facsimile machine using the new NSF and perform mutual communication using a non-standard mode,
Although it is necessary to change the NSF analysis processing method of the Axi-Li equipment, this has the drawback of being uneconomical because it requires modification of the equipment.

As a solution to this problem, in order to perform mutual communication with existing facsimile machines without changing the NSFM analysis processing method of existing facsimile machines, it is necessary to
In addition to F, N5F(1), N5F(2)...
One possible method is to take the Shinzuki format called C3l-DIS, but increasing the number of frames of this type of control signal is important because the number of frames of the initial identification signal is maximum N5F-C8I・DIS.
Since the number of frames is 3 frames, there is a drawback that analysis processing cannot be performed and mutual communication is difficult.In order to eliminate these drawbacks, the present invention sets the number of frames for the initial identification number to a maximum of 3 frames, so that the existing The purpose is to realize mutual communication economically without modifying the facsimile machine, and the drawings will be explained in detail below.

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, in which 1 is a transmission control code generation circuit, 2 is a modulation circuit, 3 is a network control device, 4 is a connection terminal with a line, and 5 is a demodulation circuit. circuit, 6
7 is a subfield separation circuit, 8 is a subfield number circuit, 9 is a memory circuit, 10 is a comparison circuit, and 11 is a reception control code analysis circuit.

The transmission control code generation circuit 1 generates N5F as an initial identification signal.
-C8I/DIS transmission data is generated, converted into an analog signal by the modulation circuit 2, and then outputted to the line via the network control device 3 and line connection terminal 4 and transmitted to the other party's facsimile machine.

FIG. 2 shows an example of the format of the binary code signal used at this time, and a high-definition data link controller (HDLC) frame structure is used for the binary procedure.

At this time, H of the binary code information shown in FIG. 2(a)
The DLC structure consists of several frames as shown in Figure 2 (bl), and each frame is further divided into smaller fields. A pre-angle signal of at least 1 second is transmitted so that pnd training sequence.In addition, NSF, C8I, D
Each IS frame corresponds to a non-standard equipment frame, a called terminal identification frame, and a digital identification frame, respectively, as shown in FIG. 2(b).

Figure 2(C) shows only the Non-Standard Equipment Frame (NSF), in which the flag sequence is used to establish bit and frame synchronization in facsimile procedures, and the 8-hit HDLC address field is used when connecting to a multipoint line. Used to identify special layers of For general telephone network 1-to-17 transmission, this field uses a single format "11111111". The 8-hit HDLC control field provides the ability to uniquely encode commands and responses to facsimile control procedures, and is in the format "l100XOOO", with ×-0, Give x-1 for the last frame in the procedure.

The HDLC information field is variable in length and contains specific information for control and messaging between the two Noakkun Millistations. The information field is divided into two parts: the facsimile control field (FCF) and the 7-bit information field (PIF), and the facsimile control field (FCF) is defined by the first eight hints of the HDLC information field. The hit designation within the FCF of the initial identification signal is as follows. Digital identification number a (DIS) indicates that the called device has standard CCTTT functionality, and the format is "OOOOOO00". The called terminal identification signal (C8I) is an optional signal that can be used to confirm the called station by a number assigned to the called station or a telephone number.
10”. The Non-Standard Equipment Signal (NSF) is an optional signal used to identify specific user requirements outside the scope of the Recommendation, and has a format of 0000010.
0”.

FIG. 2(d) shows the structure of the facsimile information field of the Id NSF frame.

In the present invention, the facsimile information field (PIF) in the non-standard equipment frame I is converted into one or more subfields Ml + M2, M31...
...Divide into Mm (m≧1). Each subfield is 8
It is a variable length data length that is an integral multiple of the hint, and each subfield M, , M21M31...2Mm
is the data block Cn1 (1≦
l≦m). For example, subfield M1 is composed of CI + C2r C3+-..., Cn1, and field M2 is composed of CI+C21C31.
..., Cn2, and are constructed in the same way sequentially, and the final Sunfield Mm is CI, C2, C3, ...
・Constructed from Corn.

rl as a means to realize identification separation of each subfield.
l. Each subfield can be separated by interpolating the length of each subfield using binary data in the first data block of each subfield.

For example, the first data block CI of subfield M1
bI+ b2+ 1)3. b4+ 1)! z
b6+ b7. When configured by bs, b1+
b2+ b3+ b4. b5. b6 and b7 indicate the data 7 lock length of subfield M].1. Maximum 1
Up to 28 data blocks can be represented.

moda bs indicates the presence or absence of an extended subfield, bs-1
If so, it indicates that the next subfield M2 exists. The data block length can be adjusted by increasing the length of the first data block.Then field can be expanded to M2, M3, etc. in the same way.In other words, the standard Equipped with new functions not found in the CCTTT function, newly created subfields for mutual communication in non-standard mode, assigning the necessary functions to the person, and creating new facsimile machines without modifying existing facsimile machines. To communicate with a device, an NSF frame is constructed by extending new fields while leaving the existing subfields as they are.

In addition, as a method for obtaining the same effect, each subfield can be separated by predetermining the data 7p block length of this subfield as a fixed block length.

When the data block length of a subfield is set in advance to a constant length, for example, the 8-bit data 1) I rb2 .・・・
By displaying the presence or absence of an extended subfield in the last hit b8 of bs, each subfield can be sequentially extended.

Therefore, the structure of the NSF frame in the initial identification signal of a facsimile machine equipped with a new function is -9 = As a method of attaching an NSF with a new subfield added due to the change of the facsimile machine, each NSF (M
,)・csr・DIS, NSF (M,,M2)・C
8I・DIS,...== NSF (Ml, M2
...-Mm), C8I, and DIS.

Next, a method for analyzing and processing control signals upon reception according to the present invention will be described.

In FIG. 1, an initial identification signal from the other party's facsimile IJ device is input to a demodulation circuit 5 via a line connection terminal 4 and a network control device 3. The demodulation circuit 5 converts the analog signal into a data signal and temporarily stores it in a reception data buffer 6 composed of a memory or the like. Zabu field separation circuit 7
reads the NSF frame stored in the received data buffer 6 and separates each subfield as follows.

If each subfield has a fixed length, its predetermined data block length is counted, and if the specified data block can be counted, one subfield is detected. At this time, if the final hit of the final data block of the subfield indicates the presence of a subsequent surp field, a similar counting process is performed.

Each time a subfield is separated in this manner, a subfield number counting circuit 8 comprising a counter or the like is activated to obtain the number k of received subfields of the NSF frame.

On the other hand, when interpolating the data lock length at the beginning of each sag field, the sab field becomes 1 when the data lock length corresponding to that value is divided.
One is detected. If the sag field indicates that there is a subsequent field, the same counting process is performed, and in this case, the number k of received sun fields can be obtained in the same way.

As mentioned above, the format of the subfields of the received NSF frame is expressed using the horn field M as follows.
M]+Ml・M2. M, ・M2・M3 + ・2
M,・M2・M3... Mm, etc.

For example, in a facsimile device that only has the ability to analyze and process frame M1, it is meaningless even if subframes after 1M2 are received, and diffraction processing of the control signal cannot be performed.

- On the other hand, a facsimile machine having an analysis processing capability in Mml needs to communicate according to the analysis content of the final subframe.

Therefore, the control signal analysis processing numerical value I7 is set in advance in the memory 9 for each Fakunmi IJ device.

The sag field in the received NSF frame is Ml,
M,・M2 + Ml・M2・M3. ..., Ml
・M2・M3・M4°・・・Mk.

Ml・M2・M3・M4・・・・・・Mk・・・・・・
・It shall be indicated in Mm (however, 1≦5m). These numerical values and k are input to the comparator circuit 1°, and the following operations are performed based on the comparison results.

The number of subfields received is T, −
4g: If it is full (k (L)), mutual communication is performed using the information in the final Zaf field Mk in the NSF frame.

On the other hand, the number of received subfields is k≧
If it is L, mutual communication is performed using information in Zazufield ML. However, if only M1 is received, mutual communication is performed using the information in M1.

As a result, subfields that communicate with each other are detected. Therefore, the reception control code analysis circuit 11 inputs the 84: sag field from the reception data buffer 6 to the above-mentioned reciprocal communication, interprets the subfields, sets the internal state of the device, etc., and transmits the data. Proceed with control procedures.

Note that a CcITT member code or the like may be inserted at the beginning of the NSF frame, and if these do not match, mutual communication can be performed using DIs.

However, FIG. 1 is an example of a failure circuit configuration for explaining the present invention in detail, and the same effect can be achieved even if a microprocessor or the like and its processing procedure are implemented using a storage memory or the like.

As explained above, the present invention divides the NSF frame into sag fields and sequentially expands the sag field using spread bits, and increases the number of initial identification signal frames to the maximum of NSF, C8I, and DIS. It can have a 3-frame configuration, and therefore has the advantage that it does not have any effect on existing facunmill devices (it can be equipped with new functions by NSF and can communicate with each other at maximum functionality.However, according to the present invention, 13- There is an advantage that the existing 7-axis IJ device can be economically expanded in function without requiring any modification of the NSF analysis processing method or the like.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, and FIG. 2 is a diagram showing an example of the format of a binary code signal used in the present invention. 1......Transmission control code generation circuit, 2.
......Modulation circuit, 3...Network control device, 4...Connection terminal with line,
5 ...... Demodulation circuit, 6 ......
・Reception data buffer, 7... Song subfield separation circuit, 8... Subfield number counting circuit, 9... Memory circuit, lO...
. . . Comparison circuit, 11 . . . Reception control code analysis circuit. 14-

Claims (1)

[Claims] When communication devices such as facsimile machines equipped with non-standard functions in addition to internationally defined standard devices communicate with each other via a line, the frame of the control signal indicating the non-standard function is simply transmitted. means constituted by one or more subfields, means for storing control signal analysis processing numerical values set individually for communication devices, and means for detecting fields necessary for mutual communication according to the control signal analysis processing numerical values. 1. A facsimile control signal processing method, characterized in that it analyzes a control signal frame composed of a single subfield or a plurality of subfields.