JPH088961A - Facsimile storage and switching system - Google Patents

Abstract

(57) [Abstract] [Purpose] When a communication error occurs during relay communication, the presence / absence of the retransmission is judged to prevent the facsimile message data from being transmitted twice and data loss, and reliable data transmission. When a communication error occurs during transmission of data (facsimile telegram) from the facsimile storage / exchange device 10 on the transmission side, a confirmation signal is sent to the facsimile storage / exchange device 13 on the reception side to inquire whether retransmission is necessary.
If there is a request for retransmission, the data is retransmitted from the facsimile storage / exchange device 10 on the transmitting side. If the result of data reception by the receiving side facsimile storage / exchange device 13 is a communication error, a resend request is sent to the transmitting side facsimile storage / exchange device 10.
To notify. The facsimile storage / exchange device 10 retransmits the data by the notification of the request for retransmission.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facsimile storage / exchange system for retransmitting facsimile message data when a transmission error or a reception error occurs in relay communication between facsimile storage / exchange devices.

[0002]

2. Description of the Related Art FIG. 6 is a block diagram showing a schematic configuration of a conventional facsimile storage / exchange system. In FIG. 6, from the originating facsimile terminals 2a, 2b ... 2n,
A secondary address (address designation information) is designated to the facsimile storage / exchange device 4, and facsimile message data (hereinafter simply referred to as data) is transmitted. The facsimile storage / exchange device 4 analyzes the secondary address (address designation information), and based on this analysis, for example, the same data is transmitted to the facsimile terminals 2a to 2n by broadcast communication, respectively. Data from the facsimile storage / exchange device 4 is relayed through the exchange 6 of the public line network, transmitted to the facsimile storage / exchange device 8 on the receiving side, and transmitted to the facsimile terminals 9a, 9b ... 9n connected to this device. To do.

Operation control devices 4a and 4b are connected to the facsimile storage / exchange devices 4 and 8, respectively, and operation start, data input restriction, operation end and the like are controlled through the operation control devices 4a and 4b. It has become. In addition, in the facsimile storage exchange devices 4 and 8,
The transmission (delivery) result information (communication report) when operating as a receiving side through the exchange 6 is used by the operation control unit 4
It is taken out with a and 4b.

Such a facsimile storage and exchange device 4,
It is known that a communication error of several percent occurs when relay transfer is performed in No. 8. That is, a communication error such as bit disappearance or garbled bit occurs due to data processing in this device, disturbance of the transmission path, and the like. Therefore, when a communication error occurs in the facsimile storage / exchange devices 4 and 8, the transmitting side device (facsimile storage / exchange devices 4 and 8).
The data is retransmitted from. When this communication error occurs, the receiving side apparatus treats this data as unprocessed and the retransmitted data as the first facsimile. This prevents the data from being transmitted twice and the data from being lost.

[0005]

However, in the above-mentioned conventional facsimile storage / exchange system, there are cases in which it is not possible to prevent double transmission of data or loss of data. For example, when the device on the transmission side recognizes that a communication (transmission) error has occurred and the device on the reception side recognizes that the data has been normally received, the device on the transmission side retransmits the data. Therefore, the device on the reception side receives the same data again together with the current data. That is, the same data will be transmitted twice to the same destination.

On the contrary, the device on the receiving side communicates (receives)
When the device on the transmitting side recognizes that an error has occurred and the device on the transmitting side recognizes normal data transmission, the device on the receiving side treats the data as unprocessed, and the device on the transmitting side processes the transmission as completed. That is, data is not transmitted to the destination and the data is lost.

The present invention solves the above-mentioned drawbacks in the prior art, and determines the presence / absence of retransmission when a communication error occurs during relay communication, retransmits when necessary, and It is an object of the present invention to provide a facsimile store-and-exchange system that can reliably transmit data by preventing double transmission of (facsimile telegram) and data loss.

[0008]

In order to achieve the above object, the invention according to claim 1 is to transfer data between a plurality of facsimile storage / exchange devices that store and exchange facsimile message data from a facsimile terminal. In a facsimile storage and exchange system that relays and stores the stored facsimile message data based on a designation from a facsimile terminal, the facsimile storage and exchange device has a determination processing means for determining a communication error during data transmission or data reception, and data. When the determination processing means determines that a communication error has occurred at the time of transmission, a retransmission inquiry means for inquiring of the connected facsimile storage exchange apparatus about the necessity of retransmission.
When the judgment processing means judges that a communication error occurs at the time of data reception, a resending notification means for making a resend request for the same data to the connected facsimile storage / exchange device, and a resending inquiry means when a transmission error occurs Resend a response to an inquiry from a connected facsimile storage / exchange device, or when the connected facsimile storage / exchange device receives a request to resend the same data due to a reception error. And a re-transmission processing unit that does this.

According to a second aspect of the present invention, there is provided a storage means for storing delivery results based on designation from a facsimile terminal, and the delivery result data stored in the storage means is stored in a plurality of facsimile storage exchange apparatuses. The configuration is such that relaying is performed between the relay stations, and when a communication error occurs in this relaying, retransmission is performed.

According to another aspect of the present invention, there is provided a facsimile storage / exchange system, wherein the facsimile storage / exchange apparatus comprises an operation control device for performing operational control, a storage means for storing a communication error during data transmission or data reception, and a display means. The communication error data stored in the storage means is read under the control of the operation control device and displayed on the display means.

[0011]

According to the facsimile storage / exchange system of the present invention having the above-mentioned structure, the facsimile message data is stored between a plurality of facsimile storage / exchange devices for storing and exchanging the facsimile message data from the facsimile terminal.
It relays data such as delivery result data. When a response requesting retransmission of an inquiry when a transmission error occurs in this relay is received from the connected facsimile storage / exchange apparatus, the data is retransmitted. In addition, a reception error occurred in the connected facsimile storage exchange device,
When a request for resending the same data is received, the data is resent. Therefore, when a communication error occurs during relay communication, the presence / absence of a resend is determined, resending is performed when necessary, and double transmission of data (facsimile telegram) and data loss are prevented.

In the facsimile storage and exchange system according to the third aspect of the present invention, the stored communication error data is read out under the control of the operation control device, and, for example, is printed and printed, or displayed on the screen. Therefore, the transmission path and the data processing state can be examined from the state of occurrence of the communication error. For example, it becomes possible to judge a communication error such as data processing in the device, bit disappearance or garbled bit due to disturbance of the transmission path, or the like.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a facsimile storage and exchange system of the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing the configuration of an embodiment of a facsimile storage and exchange system of the present invention. In FIG. 1, this example shows a facsimile storage / exchange device 10, and this device and public line La.
It has an exchange station 11 connected through the line and a facsimile storage and exchange apparatus 13 connected to the public line Lb.
Further, the facsimile storage / exchange device 10 and the communication line L
Facsimile terminal 1 connected through c, Ld ... Le
2a, 12b ... 12n and a facsimile storage and exchange device 1
3 and the facsimile terminals 15a, 15b ... 15n connected via the communication lines Lf, Lg ... Lh.

The facsimile storage / exchange device 10 is connected to the communication lines Lc to Le and is connected to the facsimile terminals 12a to 12a.
Communication Controller (CCE) that processes data from 12n
14 and a CPU 16 for controlling storage and exchange of data are provided. Further, an input / output (I / O) circuit 18,
Working RAM connected to this I / O circuit 18.
20 and a ROM 22 storing a control program are provided. Further, a hard disk drive (HDD) 24 for storing data, a communication control device 26 for exchanging data with the facsimile storage / exchange device 13 through the public lines La, Lb, and an I / O circuit 18 are connected to the present time. And a timer circuit 28 for measuring the time.

Further, there is provided an operation control device 30 for setting operation control of the facsimile storage / exchange apparatus 10, for example, operation start, data input restriction or operation end. The operation control device 30 controls the setting or cancellation of the operation control operation in cooperation with the CPU 16 of the facsimile storage and exchange device 10, and the control device 31.
A liquid crystal display (LCD) 32, which is connected to the computer, displays the control contents and input / output information, and a keyboard 34 for inputting operation control settings and cancellations. The inside of the facsimile storage / exchange device 13 has the same configuration as the facsimile storage / exchange device 10, and an operation control device 36 is further connected.

Next, the operation of this embodiment will be described. First, the overall operation will be described. This operation is a duplex (bidirectional) communication method, but only the case of relaying data from the facsimile storage / exchange apparatus 10 to the facsimile storage / exchange apparatus 13 will be described.

In the facsimile message data accumulation phase, the facsimile terminals 12a to 12n are connected to the communication line L.
Calls c to Le to connect to the communication control device 14 shown in FIG. After that, after inputting and transmitting a secondary address (address designation information) from the facsimile terminals 12a to 12n, a facsimile original is input and the data is received by the facsimile storage / exchange apparatus 10. In the facsimile storage / exchange device 10, the CPU 16 analyzes the secondary address and the like to create distribution management information, which is temporarily stored in the RAM 20 through the I / O circuit 18. In addition, I
It is stored in the HDD 24 through the / O circuit 18.

Next, in the data relay phase, the facsimile storage / exchange apparatus 10 causes the communication apparatus 26 and the public line L to operate.
The exchange 11 is called through a. When the line connection is established after this call is made, the facsimile storage / exchange apparatus 10 notifies the facsimile storage / exchange apparatus 13 of the secondary address stored in the RAM 20, and also transmits data. The facsimile storage / exchange device 13 creates distribution management information, temporarily stores it in the RAM or the like as in the facsimile storage / exchange device 10, and further stores the data in the HDD.

Further, in the distribution phase, the facsimile storage / exchange apparatus 13 operates as the facsimile storage / exchange apparatus 1.
The management information for distribution sent from 0 is analyzed, and the facsimile terminals 15a to 15n designated by this management information are called through the communication lines Lf to Lh. After that, when the lines are connected, they are stored in the HDD 24. Send the data you were doing. If the line cannot be connected, or if a communication error occurs after the line is connected, call again to connect the line.

Next, in the delivery result relaying phase, the facsimile storage / exchange device 13 determines whether the delivery to the facsimile terminals 15a to 15n processed in the delivery phase is completed, or when the delivery is completed by the line connection again. RAM (not shown) for delivery results (communication report)
It is stored temporarily in. Further, the communication control device makes a call to the exchange station 11 through the public line Lb, and after the line connection, the distribution result (communication report) is transmitted to the facsimile storage / exchange device 10 through the public line Lb. In the facsimile storage exchange device 10, this delivery result (communication report)
Is received by the CPU 16 through the communication control device 26, and the data previously stored in the RAM 20 is erased and updated.

Next, the case where a communication error occurs will be described. FIG. 2 is a flowchart showing a processing procedure when a communication error occurs during data transmission. In FIG. 2, the facsimile storage / exchange apparatus 10 on the transmission side transmits the stored data to the facsimile storage / exchange apparatus 13 at that time, for example, by specifying the time (step (indicated by S in the figure)). 101). When this transmission process is completed normally (step 102: OK), a response from the facsimile storage / exchange device 13 on the receiving side is awaited.

When a communication error occurs during data transmission (step 102: NG), a confirmation signal is sent to the facsimile storage / exchange device 13 on the receiving side (step 10).
3) Inquire about the necessity of resending. The confirmation signal is
Repeat until reception is possible (step 104). Next, it waits for a response to the confirmation signal from the facsimile storage / exchange device 13 on the receiving side (step 105). When a response is obtained, the presence or absence of retransmission is confirmed (step 106). If there is a request for retransmission, the data is retransmitted repeatedly from step 101. If there is no request for retransmission, the processing procedure ends.

FIG. 3 is a flow chart showing the processing procedure when a communication error occurs during data reception. In FIG. 3, when the facsimile message data is received (step 201), this communication result is judged (step 20).
2). When the reception result is normal (step 202: O
K), the system waits for an acknowledgment signal from the facsimile storage / exchange apparatus 10 on the transmitting side (step 205). If the reception result is a communication error (step 202: NG), the retransmission request information is set and notified to the facsimile storage / exchange apparatus 10 on the transmitting side (step 203). This confirmation signal is repeated until it can be received (step 204).

Next, in the case of waiting for a response of the confirmation signal of the facsimile storage / exchange apparatus 10 on the transmitting side (step 205), if there is a response (step 206), it is judged whether or not retransmission is necessary (step 207). If retransmission is necessary, the retransmission request information is set ((step 208)), and if not necessary, the retransmission request information is reset (step 209),
This state is transmitted as a confirmation signal (step 21)
0). Repeat until the confirmation signal is received (Step 2
11).

Next, the operation of relaying the distribution result data will be described. FIG. 4 is a flowchart showing a processing procedure when a communication error occurs during transmission of distribution result data. 4, in this case, step 101 in FIG.
The data of the distribution result is transmitted in place of the facsimile message data of (step 301). The subsequent processing procedure (steps 302 to 306) is the same as the processing procedure (steps 101 to 106) shown in FIG.

FIG. 5 is a flowchart showing a processing procedure when a communication error occurs when receiving the distribution result data. In FIG. 5, in this case, the data of the distribution result is received instead of the facsimile message data in step 201 of FIG. 3 (step 401). The subsequent processing procedure (steps 402 to 411) is the same as the processing procedure (steps 202 to 211) shown in FIG.

Further, a communication error at the time of data transmission or data reception is stored in the RAM 20, etc., and read out at a later date under the control of the operation control device 30 and displayed on the LCD 32.
It is recommended to print with a printer and save the record.
At a later date, the transmission path and data processing state can be examined from the state of occurrence of this communication error. In other words, it is possible to perform data processing in the device and determine a communication error such as bit disappearance or garbled bit due to disturbance of the transmission path.

[0028]

As is apparent from the above description, the facsimile storage / exchange system according to the first and second aspects of the present invention enables facsimile message data to be transferred between facsimile storage / exchange devices.
When data such as distribution result data is relayed and a response requesting retransmission for an inquiry when a transmission error occurs in this relay is received from the connected facsimile storage / exchange apparatus, the data is retransmitted. Also, when a reception error occurs in the connected facsimile storage / exchange device and a resend request for the same data is received, the data is resent, so if a communication error occurs during relay communication, resending is performed. The presence or absence of the data is judged, and the data is retransmitted when necessary, the data (facsimile telegram) is prevented from being transmitted twice and the data loss is prevented, and the data can be reliably transmitted.

In the facsimile storage and exchange system according to the third aspect of the present invention, the stored communication error data is read out by the control of the operation control device, printed and printed out, or displayed on the screen. This has an effect that the transmission path and the data processing state can be examined from the generation state.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an embodiment of a facsimile storage and exchange system of the present invention.

FIG. 2 is a flowchart showing a processing procedure when a communication error occurs during data transmission in the embodiment.

FIG. 3 is a flowchart showing a processing procedure when a communication error occurs during data reception in the embodiment.

FIG. 4 is a flowchart showing a processing procedure when a communication error occurs during transmission of distribution result data in the embodiment.

FIG. 5 is a flowchart showing a processing procedure when a communication error occurs during reception of distribution result data in the embodiment.

FIG. 6 is a block diagram showing a configuration for explaining a conventional facsimile storage / exchange system.

[Explanation of symbols]

 10, 13 Facsimile storage / exchange device 12a-12n, 15a-15n Facsimile terminal 14, 26, communication control device 16 CPU 24 HDD 30, 36 Operation control device 31 Control device 32 LCD

Continuation of front page (51) Int.Cl. ⁶ Identification number Office reference number FI Technical display location H04L 12/24 12/26 H04N 1/00 104 A 1/21

Claims (3)

[Claims] 1. A facsimile that relays data between a plurality of facsimile storage / exchange devices that stores and exchanges facsimile message data from a facsimile terminal and that distributes the accumulated facsimile message data based on a designation from the facsimile terminal. In the storage and exchange system, the facsimile storage and exchange apparatus includes a determination processing unit that determines a communication error during the data transmission or the data reception, and when the determination processing unit determines that a communication error occurs during the data transmission, When the facsimile storage / exchange device in connection is inquired about the necessity of retransmission and the judgment processing means determines that a communication error has occurred at the time of data reception, the connected facsimile storage / exchange device is informed of the same data. Retransmission notification means for making resend requests and when a transmission error occurs When a resend request response to an inquiry from the resend inquiry means is received from the connected facsimile storage / exchange device, or when a reception error occurs in the connected facsimile storage / exchange device and a resend request for the same data is received. In addition, a facsimile storage and exchange system comprising a retransmission processing means for transmitting the data. 2. A storage means for storing a delivery result based on designation from a facsimile terminal is provided, and the delivery result data stored in the storage means is relayed between a plurality of facsimile storage / exchange devices, and the relay is performed. 2. The facsimile storage / exchange system according to claim 1, wherein the delivery result data is retransmitted when a communication error occurs. 3. A facsimile accumulator / exchange apparatus is provided with an operation control device for performing operation control, a storage means for storing a communication error at the time of data transmission or data reception, and a display means, and the communication stored in the storage means is provided. 2. The facsimile storage and exchange system according to claim 1, wherein error data is read out by the control of said operation control device and displayed on said display means.