JPS62110359A - Facsimile communication system - Google Patents

Abstract

PURPOSE:To transmit final page information again normally even when post message answer to the final page information is retraining (RTN) by using end of message (EOM) as a post message signal of final page picture information in one communication. CONSTITUTION:Picture signals read by a picture signal reading section 1 are converted to encoded information by an encoding section 2 and stored temporarily in a picture information storing memory 3 and sent to a remote receiving set 6 through a MODEM 5 under control of a communication control section 4. Picture information to be transmitted is controlled in one page unit and when it is recognized as final page, the communication control section transmits EOM as a post message signal through the MODEM 5. When the number of errors larger than specified is detected in received picture information, the receiving set 6 gives an answer to the transmitter by a retraining (RTN) as a post message answer. When the transmitter received RTN through the MO DEM 5, the communication control section 4 makes retraining of the receiving set according to CCITT recommendation T30 and starts resending of final page information stored in the picture information storing memory 3.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a facsimile communication system, and particularly relates to retransmission control of image information.

[Conventional technology]

Conventionally, in this type of facsimile communication system in a facsimile apparatus equipped with the above-mentioned components, an end-of-procedure signal (EOP) is sent out following image information of the last page.

[°Problems that the invention attempts to resolve]

In the conventional facsimile communication system described above, after the transmitter sends all information up to the last page, it then sends out an end-of-procedure signal (EOP) and receives a retraining signal (R'rN) response. Even if the receiver 111 requests retransmission of the information, there is no means to continue retransmitting only the final page information.

[Means for solving problems]

The facsimile communication system of the present invention has a memory that stores image information on a page-by-page basis, and when the image information of the final page has been transmitted, a post message command is issued and an end-of-message signal (EOM) is transmitted. composition.

With the above configuration, even if the image information of the last page is responded to by the retraining signal (RTN),
Subsequently, it becomes possible to resend only the image information of the final page.

〔Example〕

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

FIG. 1 is a block diagram of a facsimile machine for implementing the present invention.

The image signal read by the image signal reading section 1 is converted into encoded information by the encoding section 2, temporarily stored in the image information storage memory 3, and then transmitted via the modem 5 under the control of the communication control section 4. It is transmitted to the other party's receiver 6.

The image information to be transmitted is managed page by page, and when it recognizes that it is the last page, the communication control unit 4 sends an end-op-message signal as a post-message signal via the modem 5, as shown in FIG. Send (EOM). When the receiver 6 detects a predetermined number of errors or more in the received image information, it responds to the post message and performs retraining (R
TN) to the transmitter. When the transmitter receives the retraining (RTN) via the modem 5, the communication control unit 4 retrains the receiver according to CCITT recommendation T30 and starts retransmitting the last page information stored in the image information storage memory 3. do. As shown in FIG. 3, upon receiving a message confirmation (MCF') for the last page message signal (EOM), the transmitter sends an end of procedure (EOP) to the receiver. Upon receiving the end of procedure (EOP), the receiver responds with a message confirmation (MCF) again, and releases the line in response to a disconnection signal (DCN) from the transmitter to complete communication. .

〔Effect of the invention〕

As explained above, the present invention uses an end-op-message (EOM) as a post-message response to the final page image information in one communication, so that the post-message response to the final page information can be retrained (RTN). Even if it is, the final page information can be transmitted normally again.

[Brief explanation of drawings]

1. tg is a block diagram of a facsimile machine for implementing the present invention, and FIGS. 2 and 3 are control sequence diagrams each showing an embodiment of the present invention. 1... Image signal reading unit, 2... Encoding unit, 3... Image information storage memory, 4... Communication control unit, 5... ...Modem, 6...Receiver. 2nd V Mu3 Figure

Claims (1)

[Claims] In a facsimile device including a memory in which image information of one page or more is stored and a circuit that performs communication in accordance with CCITT Recommendation T30 via the memory, and retraining signal (
RTN), the last page information stored in the memory is retransmitted, and when a message confirmation signal (MCF) for the retransmission information is received, both the transmitter and receiver end the communication normally. A facsimile communication method characterized by: