JPS6070876A - Signal transmission method of facsimile equipment - Google Patents

Abstract

PURPOSE:To attain correspondence to a remote location with high accuracy by keeping the detection of a signal imputted from a remote equipment when the signal is inputted before a communication control signal detection waiting time is elapsed and transmitting a communication control signal to the remote equipment after the end of detection. CONSTITUTION:When any communication control signal is inputted from the remote equipment before the waiting time to detect the communication control signal is elapsed, the detection is kept on while the signal is inputted and the communication control signal is transmitted to the remote equipment after the end of signal detection to avoid the collision of the signals. Since the time length of the picture signal waiting time is set based on the delay time measuring the line between the transmission and reception sides actually, the case that the correspondence is finished earlier because of less signal waiting time is avoided and the remote correspondence such as overseas correspondence is perormed smoothly.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a signal transmission method for a facsimile machine that transmits both signals after transmitting a communication control signal between a transmitter and a receiver.

[Prior art]

General facsimile transmitter side 1 and receiver (3 machines + i1.1
Figure 1 shows the exchange of 12 signals.

In the figure, 3 is a facsimile called station identification signal outputted by the receiver side 2, 4 is a self-proprietary reception function signal outputted next, and 5 is a facsimile called station identification signal 3, self-owned by the transmitter side 1. a transmission type determination signal 6 which receives and outputs the reception function signal 4;
7 is the open 4δ signal outputted next to the transmission type determination signal 5, and 7 is the transmission type determination signal 5.7 output by the receiving GX machine side 2. Receive adjustment signal 6 4
7 outputs a rejection signal, 8 outputs a rejection signal. When 7 is "'I receive an image signal'il" 3 (m has been completed),
An image signal 9 is output by the transmitter example 1, 9 is a document completion signal outputted by the transmitter J after the image signal 8 is finished, and 10 is an image signal 8 from the receiver side 2. A document record end signal 11 is output in response to the document end signal 9, and 11 is an image signal for the second sheet.

Also, Figures 2 and 3 show signal exchange when the transmission delay time (hereinafter referred to as line delay) of the communication line is large. After outputting signal 4, transmission type determination signal 5.
When the adjustment signal 6 cannot be detected, the function determination waiting time (communication control signal detection waiting time) is the time until the self-proprietary reception function signal 4 is output again. The image signal waiting time (image signal detection waiting time) is the time to wait for the input of the next image signal 11 after outputting , and to is the time when the next image signal 11 is not input within the image signal waiting time 72. represents the point at which communication ends.

Next, the operation will be explained.

For facsimile, sender side 1. The transmitter side 1 converts the original to be transmitted into an electrical signal, and transmits this to the receiver side 2 via a communication line such as a telephone line. The signal is recorded on recording paper. Come on! 1 to 3 show the transmitter side 1. The flow of signals exchanged by the receiver side 2 in the process is shown as a signal going from the transmitter side 1 to the receiver side 2, with the time sequence from left to right and the vertical direction of the time axis in each figure. This is represented by two routes for signals from the receiver side 2 to the transmitter 1ner+1.

First, when the transmitter side 1 calls the receiver side 2, the receiver side 2 says, ``This telephone line is connected to a facsimile.
is transmitted, and the transmitter side 1 is informed of what kind of electric signal can be numbered by a self-proprietary reception function signal 4.

The transmitter side 1 selects one type of electrical signal from among the self-proprietary reception function signals 4, and sends a transmission type determination signal 5 and an adjustment signal 6 to check whether the electrical signal will be transferred to the telephone line currently in use. The receiver side 2 determines whether the transmission fffiM determination signal 5 is acceptable or not based on the adjustment signal 6, and sends an open signal 7. If the open signal 7 says ``Please send an image signal,'' the transmitter side 1 sends the image signal 8 of the first document, and when the receiver side 2 receives it, it records it. Initially, when a document end signal 9 is received, recording is ended and a document recording end signal 10 is sent.

When the transmitter side 1 receives the document recording end signal 10, it sends out an image signal 11 of the second document.

By the way, when the line delay is large, it takes time for the signal sent from the transmitter side 1° and the receiver side 2 to arrive at the other party, causing a lag in the conventional communication timing. This is shown in FIGS. 2 and 3. Normally, after the receiver side 2 sends out the proprietary reception function signal 4 for some reason, the transmission type determination signal 5. Adjustment signal 6
If the signal cannot be detected, the proprietary reception function signal 4 is sent again, but if the line delay is large as described above, the proprietary reception function signal 4 is sent again as shown in FIG.
The transmission type determination signal 5 and the adjustment signal 6 are input within the waiting time for the transmission type determination signal 5 after outputting the transmission type determination signal 5, that is, within the function determination waiting time TI. and transmission type determination signal 5. δflit regular signal 6 color signal 60 (Φ) ends up being 7. Further, as shown in FIG. 3, after sending the original recording U end signal 10, the next image signal
If the input of both (both signals because the j-th standby time T2 is short) 1 is delayed, communication ends even though the image signal 11 has been transmitted.

Conventional facsimile machines are configured as described above, and although electrical signals can be selected that suit the line conditions, line delays are not taken into account, making it difficult to communicate with distant areas such as when communicating overseas. It had drawbacks such as instability.

[Summary of the invention]

This invention was made in order to eliminate the drawbacks of the conventional ones as described above, and is suitable for signal transmission of facsimile machines that can communicate over long distances (even between distant regions) such as overseas communications. The purpose is to provide a method.

[Embodiments of the invention]

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

4 and 5 show a signal transmission method of a facsimile machine according to an embodiment of the first invention of the present application, in which a signal is transmitted from the other party before the waiting time for detecting the communication 1i control signal elapses. When some communication control signal is input,
This signal continues to be detected while the signal is being input, and after the signal detection is completed, the other party It! This system is designed to send a communication control signal to the second side, and this solves the conventional problem shown in Part 2 above, where line delays cause the output signal to collide with the person on the line. In this embodiment, after the function determination standby time TI has elapsed, if any signal is input from the other party, the transmission type determination signal 5 and adjustment signal 6 are further transmitted during the signal input time T3. Fig. 4 shows the transmission type determination signal 5.
．． Fig. 5 shows the state when the adjustment signal 6 is successfully detected. In the case where both the above signals 5 and 6 cannot be received in a normal state due to noise etc., the detection is performed again after the signal input time T3 has elapsed. This shows a state in which the self-proprietary reception function signal 4 is being output. In this case, the signal input time T3, which determines the timing of sending a signal to the other party, is determined by the sum of the signal input time T3 and the function determination standby time Tl between transmission and reception. The time length is longer than the sum of the round trip line delay time and the time length of each signal 5.6 from the transmitter side, and there is no collision between the output signal and the ijL.

Furthermore, FIG. 6 shows a signal transmission method of a facsimile machine according to an embodiment of the second invention of the present application. This solves the conventional problem shown in Section 31a above, where communication is terminated even though both of the following signals are being transmitted due to line delay. It is for the purpose of

In this embodiment, the signal detection waiting time, which is the signal detection waiting time when detecting both signals from the other party, is determined by the image signal waiting time T4 ( The waiting time T2 for both signals shown in FIG.
There is no delay.

In the facsimile machine configured as above,
In receiver example 2, the signal input time T3 is provided even after the function determination standby time T1 has elapsed, and the signals 5 and 6 from the transmitter side 1 are continued to be detected. Since the signal is sent out at the same time, it is possible to avoid the 1-hour collision of the signal. In addition, the time length of the image signal waiting time T4 is set based on the delay time actually measured on the line between the sending and receiving sides, so as shown in Figure 3, the signal waiting time is short and communication can be completed first. This eliminates the problem of communication between remote locations such as during overseas communications, and enables smooth communication between remote locations such as during overseas communications.

〔Effect of the invention〕

According to the signal transmission method for a facsimile machine according to the present invention, if any communication control signal is input from the other party before the waiting time for detecting the communication control signal has elapsed, The system detects this signal while it is being input, and sends a communication control signal to the other party after the signal detection is completed, and the waiting time for detecting the image signal from the other party is reduced by both the transmitting and receiving sides. Since the setting is made based on the line delay between the two stations, it is possible to carry out highly accurate and smooth communication even when communicating at a remote location such as overseas communication.

[Brief explanation of drawings]

Figure 1 shows the signal flow in a typical facsimile machine when there is no line delay; Figures 2 and 3 show the signal flow in a facsimile machine with large line delay; 4 and 5 are diagrams showing the signal flow when the signal transmission method of a facsimile machine according to an embodiment of the first invention of the present application is applied, and FIG. 6 is a diagram showing the flow of signals according to the second invention of the present application. Figure 1 shows the flow of signals when the signal transmission method of the facsimile machine according to the embodiment is applied. 1...Transmitter side, 2...Receiver side,]゛2...Communication control signal detection waiting time, T3...Signal manual time, I゛4-Picture signal waiting time (picture signal detection waiting time ). In the drawings, the same reference numerals indicate the same or equivalent parts. Agent big sound increase tif

Claims (2)

[Claims] (1) In a signal transmission method of a facsimile machine that transmits a communication control signal to the other party in response to a communication control signal transmitted from the other party and then transmits an image signal, detecting a communication control signal from the other party. If some kind of communication control signal is input from the other party before the communication control signal detection waiting time elapses, this signal will continue to be detected while the signal is being input, and communication will be sent to the other party after the signal detection is completed. A signal transmission method for a facsimile machine, characterized in that a control signal is transmitted. (2) Transmit a communication control signal to the other party in response to a communication control signal transmitted from the other party, and then send a picture message. In the signal transmission method of facsimile machines that transmit signals, the image signal detection waiting time when detecting an image signal from the other party is set based on the transmission delay time of the communication line between the sending and receiving sides. Signal transmission method for facsimile equipment.