JPS5831653A - Transmission system for facimile storage signal - Google Patents

Abstract

PURPOSE:To inform defective transmission of a stored picture signal to a facsimile device, by completing the transmission after the transmission of a specific picture signal, if the transmission of the stored picture signal is disable from a storage exchanger to the facsimile device. CONSTITUTION:A storage control section 7 executes a call set procedure through an exchanger interface section 8 and starts a facsimile control section 6. The section 6 transmits a stored picture signal through the parallel operation with the section 7 after the execution of pre-procedure of message. If failures such as defective decoding and expansion and unmatched transmission speed take place, the section 6 transmits a specific picture signal. Further, the transmission of the stored picture signal is stopped and after the execution of post-procedure of message, the abnormal completion of operation is informed to the section 7. The section 7 executes a call restoration procedure and opens the line.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method in a facsimile storage and forwarding system for notifying a facsimile device of an abnormal state during the transmission/sending operation of a stored image signal to the facsimile device.

FIG. 1 is a diagram illustrating the signaling system of a facsimile communication call between analog 7° axis devices for a telephone switching network.
Reference numerals 1 and 2 indicate analog facsimile devices for a telephone exchange network, 1 is a calling side, 2 is a called side, and 9 is an exchange.

In the illustrated relationship, the period from off-hook a to on-hook L of facsimile machine 1 is a one-way facsimile communication call. The facsimile procedure is from the called station identification signal 6 to the procedure end signal j, and the facsimile procedure includes 1. A pre-message procedure and a post-message procedure are performed with a message, which is an image signal, in between. The message confirmation signal 1 indicates the completion of the recording operation of the image signal, and is transmitted regardless of the image quality of the communication.The communication image quality is determined by the operator and notified to k at the time of the call. In some cases, the image signal is retransmitted by the same device or by another device.

However, it has been impossible to apply the above-described exchange method between facsimile machines to the facsimile storage and exchange system described later. Specifically, in the 7 facsimile communication call between the facsimile device and the storage and forwarding device, there is a means for notifying the facsimile and the device side of an image signal failure caused by an abnormal state occurring during the storage and forwarding device's operation of transmitting the stored image signal. There is no.

The present invention has been made in view of the above-mentioned points, and, if the transmission of the stored image signal becomes impossible during the operation of transmitting the stored image signal from the storage/exchange device to the facsimile device, a predetermined fixed image is sent to the transmitted image signal. This feature is characterized in that the transmission operation is terminated after the signal is inserted.This makes it possible to notify the facsimile machine of a failure in the transmission operation of the stored image signal, and furthermore, it is possible to start communication at the point where the failure occurs in the transmission operation. This will be explained in detail below.

FIG. 2 shows an example of a facsimile store-and-forward system to which the present invention is applied, in which 1.2 is an analog facsimile device for telephone exchange, and 3 is a private branch exchange 14, which is a store-and-forward device.

In this type of system as described above, a facsimile communication call from the facsimile machine 1 on the calling side is temporarily stored in the storage and forwarding device 4, and then transmitted to the facsimile machine 2 on the called side, which is the designated destination. Alternatively, communication is performed in the opposite direction.

FIG. 3 is a block diagram showing an example of the storage/forwarding device 4 in the above system. In the figure, 5 is an exchange interface section, 6 is a facsimile control section, 7 is a storage control section, and 8 is a magnetic disk device. The storage control section 2 is the main control section of the storage and forwarding device, and performs call processing of facsimile communication calls and control of the magnetic disk device 8. The exchange interface unit 5 executes call setup and call recovery procedures for facsimile communication calls under the control of the storage control unit 2. A plurality of facsimile control units 6 are installed according to the types of facsimile machines to be communicated with, and they are used to activate the storage control unit 2, execute message pre-procedures and post-message procedures, transmit and receive image signals, and perform image processing. It has functions such as analog/digital conversion for signal accumulation, encoding compression/61 encoding/expansion processing, and transfer control of accumulated information with the accumulation control section.

FIG. 4 is a diagram illustrating an embodiment of the present invention, and is a diagram illustrating a signal system in a facsimile storage signal transmission system. In the figure, from the call selection signal m to the response signal n is the call setting procedure, from the transmission identification signal O to the reception preparation confirmation signal f is the pre-message procedure, and from the message end signal ri to the procedure end signal j is the quick post-message and disconnection. Signal p is the call recovery procedure. 2 is an analog facsimile device for a telephone exchange network, 3 is a private branch exchange, and 4 is a storage and forwarding device. This storage/exchange device 4 identifies the specified destination and transmits an image signal to the facsimile device 2.

In the above configuration, the storage control section 7 executes a call setting procedure through the exchange interface section 5 and activates the facsimile control section 6 connected to the facsimile machine of the communicating party. After executing the pre-message procedure, the facsimile control unit 6
In parallel operation with the accumulation control section 2, the operation of transmitting the accumulated image signal is started. During the storage image signal transmission operation, if a failure occurs such as a defective decoding/expanding process, a transmission operation speed mismatch, or a failure in the storage surface reading operation, a predetermined image signal is sent instead of the image signal under the control of the storage control section 2. A fixed image signal created by the facsimile control unit 6, for example, a black signal, is transmitted. Thereafter, the transmission operation of the accumulated image signal is stopped, and after executing the post-message procedure, the accumulation control unit 1 is notified of the abnormal end of the operation. The storage control section 7 executes a call recovery procedure through the exchange interface section 5 and releases the line. Thereafter, the storage/forwarding device 4 performs predetermined processing, such as repeating retransmission processing, or outputting a message to the effect that a failure has occurred via an output device such as a timer (not shown) to inform a maintenance person. will be carried out. In addition, the facsimile machine on the called side can also detect defective image information due to the above-mentioned failure from the fixed image signal on the received image.

As described in detail above, when the facsimile machine becomes unable to transmit the stored image signal during the transmission operation of the stored image signal, the present invention inserts a fixed image signal into the transmitted image signal and after transmission, the facsimile communication call is made. With this configuration, it is possible for the facsimile machine to know whether there is a defect in the received image directly from the received image, which is effective for receiving operations when the operator is not present. It does not require any special means or modification of the facsimile machine, and it also has excellent features such as eliminating invalid line hold as it terminates the 7-ac-similiary communication call when a transmission malfunction occurs. The effects can be expected.

Although the above embodiment describes the transmission operation with an analog facsimile device, the present invention is not limited to this, and even if the communicating device is a digital facsimile device, the intended purpose can be achieved. It is possible, and the effect will not be lost.

[Brief explanation of the drawing]

FIG. 1 is a diagram explaining a facsimile communication call system between analog facsimile devices for a telephone exchange network, FIG. 2 is a system configuration diagram showing an example of applying the present invention, and FIG. 3 is a block diagram of a store-and-forward device in the system. 4 are diagrams for explaining a signal system of a storage signal transmission system showing an embodiment according to the present invention. 1.2 is an analog facsimile device for the telephone exchange network; 3 is a private branch exchange; 4 is a storage and switching device; 5 is a switch interface unit; 6 is a facsimile control unit; 7 is a storage control unit;
9 is a magnetic disk device, 9 is a switchboard, &-b is a facsimile machine') is a control signal for controlling the communication call procedure. 〇Figure 4

Claims (1)

[Scope of Claims] In a facsimile storage and forwarding system that temporarily stores image signals from a facsimile device in a storage and forwarding device that constitutes the system, and then transmits the image signals to a specified destination, the storage and forwarding device provides If the transmission operation stops working properly due to a failure while transmitting a stored image signal to a facsimile device, a predetermined fixed image signal/signal will be sent in place of the stored image signal, and then
A facsimile storage signal transmission method characterized by terminating the transmission operation.