JPS62175071A - Facsimile system - Google Patents

Abstract

PURPOSE:To receive all signals in case of transmitting them confidentially from a transmitting side by reporting information as to how many pages of an original can be received confidentially according to the predetermined size and number of characters from a receiver to a transmitter and to a user. CONSTITUTION:A transmitter receives a standardized signal NSF and a digital identification signal DIS and displays the N pages of confidential transmission in a display section 9 according to the predetermined size and number of characters or prints in a recording paper in a recording section 7. An operator lookers the indicator or the result of printing and compares the number of sheets to be transmitted with the number of sheets that can be transmitted and sends out a standardized function setting signal NSS and a digital command signal DCS, and successively sends out a training signal and a training check signal. A receiver receives NSS and DCS and sets a confidential flag, and executes the alignment of the position by the training signal and sends out a preparation for receiving completion signal CFR. The transmitter prints out year, month, day and time of receiving confidential communication and the number of pages in a recording dear in the recording section 7. Thus, all information to be transmitted can be sent by one transmission operation.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a facsimile system having a confidential communication function.

[Prior Art] When a receiver performs confidential communication, a memory area allocated for confidential communication is set in the receiver. In this case, if the transmitter tries to transmit data for a large number of sheets as confidential, there is a problem in that it may not be possible to receive all of the signals, and the data may become unreceivable midway through.

In other words, when carrying out confidential communication, a memory is required to store the confidential communication information, and when a transmitter requests confidential communication, the receiver will, if there is even a little free space in its memory, It issues a response signal indicating that reception is possible and starts communication.

However, if the memory on the receiving side becomes full during the middle of the transmission, for example, reception will be interrupted midway through the original or before all the originals have been sent, and the receiving side will disconnect the line.

Therefore, there is a problem in that information may be missing, or the reception may be incomplete, and it is necessary to wait until memory becomes available and then transmit again.

[Purpose of the Invention] The present invention has been made by focusing on the problems of the above-mentioned conventional example, and is intended to eliminate the case where all signals cannot be received when the transmitting side sends confidential data. The purpose is to provide a facsimile system that allows

[Embodiments of the Invention] FIG. 1 is a block diagram of a facsimile machine for sending and receiving functions to which the present invention can be applied.

In FIG. 1, ■ is a network control unit (hereinafter referred to as rNCUJ), 2 is a telephone, and 3 is a link. 4 is a modem,
5 is a main control unit (hereinafter referred to as rcPUJ) having a ROM storing programs for communication procedure processing, encoding processing, decoding processing, and control of each section. 6 is a document reading section, 7 is a recording section, 8 is a key input section, 9 is a display section, and 10 is a telephone line.

FIG. 2 is a flowchart of the CPU 5 when operating as a transmitter. FIG. 3 is a flowchart of the CPU 5 when operating as a receiver.

First, the transmitter hears a dial tone (S1) and then dials the other party (S2).

If the ring tone calling the other party is not heard from the telephone (S3), the line is disconnected after a predetermined period of time (54.S
5), then call the other party and send CE'D (
called station identification signal) or N5F (targeted station identification signal) and DIS
(digital identification signal) is not received within a predetermined time, the line is disconnected (S6-5ii).

On the other hand, the receiver detects the ring (TI), and if it is in a state where it can receive (T2), transmits CED (T3), and calculates the remaining amount of its own memory capacity.

Calculate how many pages of the manuscript can be confidentially received according to the predetermined size and number of characters (T4)
, and then encodes the calculation result, sets it in NSF, and sends out NSF and DIS.

After receiving the NSF and Dis (S9), the transmitter determines whether the transmission is confidential transmission (S12).

If it is a confidential transmission, N pages (N=1 or more) will be displayed on the display.

'If N=O, display or print a symbol representing confidential data) is displayed on the display section 9, or the recording section 7 prints "N page" on the recording paper (S13).

The operator looks at the display or the print result, compares the number of sheets to be sent with the number of sheets that can be sent, and decides whether to send or not (S L 4). If not, one device is Perform a stop action and disconnect the line (S1
5).

When performing confidential transmission, NSS, which is the NSF response signal,
A bit indicating confidential transmission is set in (standardized function setting signal), N/SS is sent, and DOS (digital command signal) is sent (S16). If the transmission is not confidential, NSS and DOS are sent without setting the confidential transmission bit.

The transmitter sends a training signal, TC, following the above signal.
F() laning check signal) is sent out (S17
) and waits for a CFR (reception ready signal) sent from the receiver (S18).

The receiver receives NSS and DOS (T6), and if it cannot receive it after a predetermined period of time, it disconnects the line (T7, T6).
8). If NSS and DOS can be received and the confidential bit is set (T9), the confidential flag is set (TIO).Although the confidential flag is not shown, the flag is determined during the message reception operation. This is used to determine whether to store in memory or print. Positioning is performed using a training signal sent out following NSS and DOS (Tll), and when phase alignment is achieved, CFR is sent out (T12), and the process proceeds to a message reception routine (T13).

If the transmitter is able to receive the CFR, it proceeds to the message transmission operation (S L 9). After receiving the message, the receiver prints out the year, month, H1 time, and page number of the confidential reception on recording paper in the recording unit 7 as a confidential communication report.

Since the transmitter operator can be informed of the number of pages that the receiver can receive, the transmission will not be stopped due to memory overflow during transmission. In other words, all of the information desired to be transmitted can be sent in one transmission operation.

[Effects of the Invention] According to the present invention, it is possible to eliminate the case where all signals cannot be received when the transmitting side transmits confidential signals.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a facsimile machine for both sending and receiving purposes. FIG. 2 is a flowchart on the transmitter side showing the operation of one embodiment of the present invention. FIG. 3 is a flowchart showing the operation on the receiver side in the above embodiment.

Claims (1)

[Claims] The receiver notifies the transmitter of information on how many pages of the manuscript can be confidentially received according to a predetermined size and number of characters, and the transmitter notifies the user of this information. Features facsimile method.