JPS6156656B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a facsimile communication control system,
In particular, the present invention relates to a facsimile communication control system that allows both image information and character information to be transmitted under standard transmission control procedures.

Transmission control procedures that are normally covered by CCITT standards are defined in CCITT Recommendation T30. This is widely used for point-to-point communication between FAX and FAX connected to a general telephone line, and it is used to trace facsimile image information, so-called content written on a transmission document, using main scanning lines and sub-scanning lines. It is designed to transmit only signals converted into electrical signals (hereinafter referred to as image information). Figure 1 shows an example of the procedure of CCITT Recommendation T30. However, with the transmission procedure as it is, it is not possible to connect it to a computer or to make it into a multipurpose intelligent terminal that allows searching, inquiry, registration, updating, editing, etc. That is, character information such as address or index information is required when performing a search, registration, etc. on a computer, so the computer cannot be used unless character information in the so-called code format is transmitted and received. Furthermore, a format overlay function that has a code information input means, transmits the code information and image information to the other party, and outputs the combined result to the receiving section cannot be used. Furthermore, the data entry function performed by the intelligent terminal and the function of transmitting and receiving only character information and printing it out by the character generator cannot be executed.

Normally, character code transmission and reception as described above is generally performed using high-level procedures such as BSC procedures and HDLC procedures, and it is possible to transmit image information such as facsimile using these high-level procedures. However, in that case, the configuration of the facsimile device becomes complicated, and it is difficult to efficiently transmit image information over a general telephone line connection.

By the way, standard high speed G3 that complies with CCITT standard.
(Group 3) In FAX, a 300bps low-speed modem is used to send and receive control signals including attribute information of the fax machine, and a 9600 to 2400bps high-speed modem is used to send and receive fax image information.
Therefore, in this transmission control procedure, the above standard G3FAX is used.
In addition to the functions of
If you can provide a function to transfer character frames using a low-speed modem or a high-speed modem without affecting the G3FAX transmission control procedure, it will be possible to efficiently send and receive image information and character information. becomes.

An object of the present invention is to enable efficient transmission and reception of character information for data processing under a facsimile-specific procedure, for example, a T30 transmission procedure, by realizing the above-mentioned functions. In a facsimile communication control method that mutually communicates attribute information and performs facsimile communication according to the capabilities of the other party's facsimile device, the facsimile device is provided with a character code transmission/reception function and the other party is notified of the character code transmission/reception capability. When it is determined that the connected facsimile devices have the ability to send and receive character codes, the system has a function that notifies the other party of the ability to send and receive character codes. At the point immediately after the phase of
The present invention is characterized in that it is possible to prepare phases for transmitting and receiving character codes as necessary.

In other words, the present invention adds a phase for transmitting and receiving unique character information to the procedure widely used in standard facsimile machines such as G3 facsimile, thereby making it possible to perform normal facsimile communication with other standard G3 FAX machines. Furthermore, character communication is possible between facsimile devices having the ability to transmit and receive character information. In other words, it is possible to communicate both image information only and image information plus character code information using one facsimile transmission procedure.

Next, the transmission procedure of the embodiment of the present invention will be explained with emphasis on the phase of transmitting and receiving character information.
First, the character information frame transmission/reception phase is not used until the notification of attribute information for partner confirmation is completed, and the phases to be executed are immediately after phase B (immediately before phase C), as shown in FIG. and immediately after Phase D. but,
For faxes that do not have a character information frame so as not to affect the standard G3FAX transmission procedure,
The above phase will be skipped. In addition, regulations such as the format, transmission/reception direction, transmission/reception timing, error recovery, etc., which are the transmission procedure for code transmission/reception in this character phase, are established at the operational level. Furthermore, the transmission speed at which the character phrase is executed is determined by using either a low-speed modem or a high-speed modem, depending on the capabilities of the fax.
A low-speed modem can be used for short character frames, but for long frames, a high-speed modem should be used because it needs to be faster in terms of time.

FIG. 3 is a block diagram of a facsimile apparatus according to an embodiment of the present invention, in which 1 is a processing section, 2 is a central processing circuit (CPU), and 3 is a read-only memory in which a program is stored. (ROM), 4 is a random memory where data etc. are stored.
Access memory (RAM), 5 is a transmission control circuit section, 6 is a modem device (MODEM), 7 is a line, 8
is the reading section, 9 is the recording section, 10 is the display, 1
1 is the keyboard, 12 is the fax manuscript, 13 is the OMR
It is paper. In an embodiment of the invention, the character code can be entered from the OMR form 13 or the keyboard 11.

FIG. 4 shows 1 of the operation flow of the embodiment according to the present invention.
This is an example. Hereinafter, the operational aspects of the present invention will be explained based on FIG. 4. First, the sending facsimile device dials and calls the other party's receiving facsimile device. Then, after the transmitting side and the receiving side are connected, the receiving side notifies the transmitting side that "code transmission/reception capability is available" using an NSF signal. When the sending side receives a notification from the receiving side that it is capable of sending and receiving codes, if there is code information to be sent to the other party, it notifies the receiving side that it is capable of sending and receiving codes using an NSS signal. After that, when the TCF signal and CFR signal communication is completed and Phase B is completed, the transmitting side inputs, for example, the "registered data index, title, and page number" as code information, and receives it as an NSFC signal. Send it to the side. The receiving side receives these code information in the form of a character frame and checks whether or not it was received normally.
Inspect by CRC check. If the result of the CRC check is normal, the receiving side prepares a "registration ready message" and sends it to the transmitting side using an NSFA signal. Furthermore, if the result of the CRC check is that it is defective, it is notified to the transmitting side using an NSFNA signal, or there is no response.

After sending the code information, the sending side identifies the response sent back from the receiving side and determines whether the response is
If it is an NSFA signal, the code information transmission phase (character phase) is ended and the process moves to phase C, the image information transmission operation. In the illustrated example,
As the FAX information, information such as 20 pieces of bread, 25 pieces of coffee, and 30 pieces of beer is transmitted to the receiving side. On the receiving side, this fax information is combined with the previously received code information (title, number of pages), and a recording/output operation is performed. In the illustrated example, “Sales slip,
5689, #001" has already been sent as code information.

On the other hand, as a result of identifying the response from the receiving side on the sending side, if the response is NSFNA (CRC error) or a timeout due to no response, the code information is repeatedly sent a predetermined number of times until the receiving side receives it normally. Perform the action. In the illustrated embodiment, the configuration is such that it can be transmitted up to three times. In addition, if the receiving side does not receive the signal normally even after sending the specified number of times, or if the response from the receiving side is an NSFA signal.
If there is no NSFNA signal, a line disconnection operation (DCN signal transmission) is performed.

When the phase C image information sending operation is normally completed, the process moves to phase D, where EOP signals and MCF signals are exchanged. After phase D ends, the character phase again occurs, and a "communication certification request" is sent from the transmitting side to the receiving side using an NSFC signal. In response, the receiving side sends "communication certification data" to the transmitting side using an NSFA signal. This "communication proof data" is printed out on the sending side, and the communication between the sending and receiving ends with this.Finally, the communication from the sending side to the receiving side is
A DCN signal (line disconnection command) is sent.

In FIGS. 1, 2, and 4, the solid line signals are low speed modem signals, and the broken line signals are high speed modem signals.

The above embodiment shows a case where both image information and code information are transmitted and received under the standard transmission control procedure between facsimile machines having code information transmitting and receiving functions. Even when connected, it goes without saying that when there is no need to send and receive code information, the character phase is not executed and only image information is sent and received as before. Furthermore, although the above embodiments have shown the case where the procedure of CCITT Recommendation T30 is applied, it is clear that the present invention is not limited to this procedure.

As explained above, according to the present invention, a phase for transmitting and receiving character codes is provided as necessary during the execution of the transmission control procedure that is designed to only transmit and receive facsimile information. It becomes possible to efficiently transmit and receive code information and code information, and the effect is extremely large.

[Brief explanation of the drawing]

Figure 1 shows an example of the transmission procedure of CCITT Recommendation T30.
FIG. 3 is a block diagram of a facsimile apparatus according to an embodiment of the present invention, and FIG. 4 is an example of an operation flow of an embodiment according to the present invention. In Figure 4, NSF is a signal used to notify code transmission and reception capabilities,
NSS is a signal used to notify the presence or absence of code transmission/reception, and NSFC, NSFA/NSFNA are code information transmitted in character phases.

Claims (1)

[Claims] 1. In a facsimile communication control method that mutually communicates attribute information and performs facsimile communication according to the capabilities of the other party's facsimile device, the facsimile device is provided with a character code sending/receiving function and the other party is notified that it has the character code sending/receiving capability. When it is determined that the connected facsimile devices have the ability to send and receive character codes, the system has a function that notifies the other party of the ability to send and receive character codes. A facsimile communication control system characterized in that it is possible to prepare a phase for transmitting and receiving a character code as necessary immediately after the phase.