JP2006311344A - Data communication device and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a data communication device equipped with a function which reports that a file is downloaded certainly and transmitting link place information, when the size of taken-in data is large. <P>SOLUTION: A manuscript reader 2 reads data and transmits them to a user terminal from communication department 10. When the size is large, this state is displayed on a screen of a final control element 6, also link place information is transmitted to a user terminal, and a downloading method is made to be selected. A download situation is checked by the final control element 6, and transmits reminder E-mail to a non-downloaded user terminal. A deletion day of preservation data of each user terminal is checked, only data of a downloaded user terminal are deleted from a data storage 11, and a notice of deletion is performed to a non-downloaded user terminal. If the download of all the user terminals is completed, data of the data storage 11 may be deleted also before a term. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a data communication device such as an MFP (Multi-Function Printer) or a digital multifunction device, and more particularly to a data communication device and a program for efficiently using scanned images.

  Conventionally, when reading data such as images printed on paper and sending it as an attached file by e-mail (hereinafter referred to as “Scan To E-mail”), the file size is large. Sometimes this is done by dividing the file and sending it. In other words, in general, when attaching a file to an e-mail, send it at once because of countermeasures against attacks such as sending a large amount of data at once to bring down the server, security restrictions, etc. The maximum amount of data that can be played is limited. Therefore, for such a reason, a large amount of data (or file) may have to be divided and transmitted. It is assumed that the problem of a mailer that cannot receive an e-mail with a divided server load is avoided.

  Also, in a scanner that attaches data read from printed paper to an e-mail and sends it to a delivery destination, if the data size (or file size) is large, attach the link destination information of the delivery data to the e-mail. The technique of transmitting is also described (for example, refer to Patent Document 1). Furthermore, in a scanner that attaches read image data to an e-mail and sends it to a delivery destination, if the data size is large, it is sent to an FTP (File Transfer Protocol) server and downloaded by the user, or the user's PC ( A technique for transmitting data to a personal computer is also disclosed (see, for example, Patent Document 2).

Also, in a document management system that saves document files on a server with a retention period, technology that deletes document files when the retention period expires, or when a retention period has expired, the document file is delivered via e-mail A technique for deleting a file is also disclosed (for example, Patent Document 3). Furthermore, a technique for registering an e-mail including an attached file on a website homepage and transmitting an e-mail with only information such as a URL (Uniform Resource Locators) as a destination is also disclosed. In this case, the other party who receives the electronic mail downloads the attached file from the URL. In addition, when the time limit has expired, the attached file is deleted when the recipient refers to all the websites, but when there are members who have not yet referred to, the deletion is not performed (for example, Patent Document 4). reference).
JP 2000-293448 A JP 2004-104484 A JP 2002-251304 A JP 2004-318386 A

  However, in the conventional data communication device including each of the above-mentioned patent documents, when a large amount of data (or file) is divided and transmitted, incomplete data may be generated if data that is not downloaded remains in the server. As a result, the user terminal is not able to read data correctly. Further, when data is transmitted / received within an in-house LAN (Local Area Network), even if a divided mail is sent from the data communication apparatus, the load on the server does not change so much, so there is no point in dividing the mail. Furthermore, in an environment where the receiving terminal is connected via a VPN (Virtual Private Network) or the like, it is possible to download a document from a digital multi-function peripheral equipped with an image storage device, but depending on the characteristics of the recipient's mailer In some cases, the receiving terminal cannot receive the split mail. In addition, the user wants to delete the data stored in the memory of the data communication device as quickly as possible. However, since there is a possibility that the user terminal download may be omitted, there are various restrictions for deleting the data in the memory. is there.

  The present invention has been made in view of the above problems, and one object is to transmit link destination information by another means when the size of captured data is large and to ensure that the file is downloaded. It is to provide a data communication device having a function of notifying that. Furthermore, another object is to provide a data communication apparatus and a program having a function capable of managing a data download deadline so that no mistake occurs between download and data deletion.

  A data communication apparatus according to the present invention was created to achieve the above-described object, and is a data communication apparatus that reads desired data and transmits it to a user terminal, and the data capacity is a preset size set in advance. If it exceeds the set size, the link destination information is notified to the user terminal when the data exceeds the set size. A function for selecting a download method for downloading the data, a function for confirming the download status of the data, and when the data download deadline is reached, the desired data is sent to the corresponding user terminal based on the selected download method. A configuration having a function of transmitting and a function of deleting the corresponding data after transmitting desired data is adopted.

  According to such a configuration, when the data capture size exceeds a preset size, the fact is displayed on the screen, so that the data size can be immediately confirmed. At this time, even if “Scan To PC” is specified, if the set size is exceeded, the link destination information is notified to the user terminal by e-mail, and the user terminal is made to select the data download method. Furthermore, the download status by each user terminal is confirmed. In addition, when the data download deadline arrives, the desired data is actively transmitted to the corresponding user terminal based on the selected download method, and after the desired data is transmitted, the corresponding data is deleted. .

  Therefore, according to the data communication apparatus of the present invention, large data can be transmitted to the user terminal without imposing a load on the server. Furthermore, since the data communication apparatus according to the present invention does not employ a method of dividing and transmitting data, it is possible to cover the state of a mailer that cannot receive a divided electronic mail. In addition, since a transmission form such as a download method can be selected at the time of issuing an e-mail, selection according to the environment of the infrastructure can be performed. Furthermore, the sender can reliably grasp whether or not the file has been downloaded at the user terminal. Further, when the data download deadline has come, the desired data is transmitted to the corresponding user terminal and then deleted. As a result, it is possible to prevent data download leakage from the user terminal to a minimum, and to reduce the memory capacity of the data communication apparatus.

  In addition to the configuration of the invention, the data communication device of the present invention further has a function of transmitting a warning e-mail indicating that the data download deadline is near to the user terminal a predetermined time before the data download deadline. The structure with is adopted. Furthermore, in addition to the configuration of the invention, the data communication device of the present invention has a configuration including a function of automatically deleting data before the arrival date of the download deadline when all user terminals have completed downloading of data. Adopted.

  According to such a configuration, since the user terminal is notified that the data download deadline is nearing a predetermined time before the data download deadline, the user terminal can be prompted to download. Also, when all user terminals have completed the download, the data is automatically deleted even if the download deadline has not been reached, so the data stored in the memory is organized before the download deadline, enabling the hard disk Can be used.

  Further, in addition to the configuration of the invention, the data communication device of the present invention sends a prompting e-mail for prompting a download to a user terminal that has not completed data download according to the result of checking the download status. It has a configuration with a function to transmit. Furthermore, the data communication apparatus of the present invention employs a configuration including a function capable of arbitrarily setting a data download deadline in addition to the configuration of the above invention.

  According to such a configuration, when a predetermined time limit comes, it is possible to automatically deliver an e-mail to a user terminal that has not been downloaded and prompt the user to download it. Further, it is possible to prevent a file that has not been downloaded even if the file download deadline has been reached from being automatically deleted. Furthermore, the extended storage period of the file can be arbitrarily designated.

  The present invention can also provide a program that causes a computer to execute a data transmission method. That is, a program for causing a computer to execute a data transmission method for transmitting data read by a data communication device to a user terminal, and determining whether or not the data capacity exceeds a preset set size. A procedure for displaying information indicating that on the screen, and a procedure for notifying the user terminal of link destination information when the data exceeds the set size and selecting a download method for downloading the data. , A procedure for confirming the data download status, a procedure for transmitting desired data to the corresponding user terminal based on the selected download method when the data download deadline has arrived, and A program for causing a computer to execute a procedure for deleting data can be provided. .

  Further, in addition to the procedure of the present invention, a procedure for transmitting a reminder e-mail for prompting a download to a user terminal that has not yet completed data download according to the confirmation result of the download status, and a data download The procedure for sending a warning email indicating that the data download deadline is near to the user terminal before the predetermined time, and when all user terminals have completed the data download, It is also possible to provide a program for adding a procedure for automatic deletion and causing the computer to execute it.

  According to the data communication apparatus of the present invention, large data can be transmitted without imposing a load on the server. Furthermore, since the data communication apparatus according to the present invention does not employ a method of dividing and transmitting data, it is possible to cover the state of a mailer that cannot receive a divided electronic mail. In addition, since a transmission form such as a download method can be selected when an e-mail is issued, selection according to the environment of the infrastructure can be performed. Furthermore, the sender can reliably grasp whether or not the file has been downloaded at the user terminal. Further, when the data download deadline has come, the desired data is transmitted to the corresponding user terminal and then deleted. As a result, it is possible to prevent data download leakage from the user terminal to a minimum, and to reduce the memory capacity of the data communication apparatus.

<< Summary of Invention >>
The data communication apparatus of the present invention has a function of notifying the recipient of the link destination information by e-mail and downloading the desired data when the size of the captured data is large. It also has a function to prevent the recipient from opening the file due to mailer restrictions. Furthermore, since it is not possible to confirm whether or not the file has been downloaded by simply transmitting the link destination information, a function of notifying the sender that the file has been downloaded is provided.

  In other words, the data communication device of the present invention is a data communication device that attaches the read data to an e-mail and transmits it to a delivery destination. If the size of the read data is large, the data is stored in a storage means. After that, when the stored data is distributed, the link destination information of the distribution data is attached to the electronic mail and transmitted. In this way, the user terminal is prompted to download the distribution data.

  Furthermore, the data communication apparatus of the present invention deletes the data stored in its own storage means after transmitting the corresponding data to a user terminal that does not download even when the download limit of the distributed data comes. At this time, the data communication apparatus transmits the data attached to the e-mail. Further, the data can be divided and transmitted. Further, when transmitting data to a destination user terminal, FTP (File Transfer Protocol), HTTP (hyper Text Transfer Protocol), SMB (Server Message Block), or the like is used.

  More specifically, the data communication apparatus of the present invention attaches link destination information to an email instead of attaching data to the email in order to reduce the load on the server or network when the data size is large. And take a transmission system. Then, if the user terminal has not downloaded the corresponding data even when the data download deadline has come, in order to delete the data for which the download deadline has come, the data to be forcibly downloaded is sent to the destination user terminal To send to.

Embodiment 1
Hereinafter, embodiments of a data communication apparatus according to the present invention will be described by taking a digital multi-function peripheral as an example with reference to the drawings. FIG. 1 is a configuration diagram of a digital multi-function peripheral applied to the first embodiment of the present invention. A digital multifunction device 1 shown in FIG. 1 includes a document reading unit 2, an image storage unit 3, a Web server 4, an FTP server 5, an operation unit 6, a timer 7, an SMTP protocol 8, an SMB protocol 9, and a communication unit 10. It has a configuration. In the data communication device 1, a data size (Mbit) that can be transmitted is set in advance.

  Next, the operation of the digital multi-function peripheral 1 according to the first embodiment will be described. The procedure up to image transmission by the digital multi-function peripheral 1 is the same as the conventional scanning operation, and is performed by the procedure of (1) designation of a sender, (2) designation of a transmission destination, and (3) capture of an image. When the image capturing by the document capturing unit 2 is completed, if the captured image exceeds the specified size, a warning message is displayed on the screen of the operation unit 6.

  FIG. 2 is a diagram showing a warning message of exceeding the specified size displayed on the screen of the operation unit 6 in the digital multi-function peripheral 1 shown in FIG. In other words, if the captured image exceeds the specified size, as shown in Fig. 2, “The transmission size limit has been exceeded. Saves the document in the image memory and notifies the destination of the link. Is displayed.

  Note that the image storage unit displayed on the message screen in FIG. 2 is the image storage unit 3 mounted on the main body of the digital multi-function peripheral 1 such as an HDD memory. Here, when a notification that the transmission size limit has been exceeded is made, the user terminal that is a member of the transmission destination is made to select what means is used to download the file.

  FIG. 3 is a view showing a download means selection screen displayed when “next” is pressed on the transmission size limit excess screen shown in FIG. That is, when “Next” is pressed on the screen for exceeding the transmission size limit in FIG. 2, the download means supported by the data communication apparatus 1 are displayed. Press. That is, in the example of FIG. 3, one of “notify link destination in HTTP / notify link destination in FTP / notify link destination in SMB” is selected and “Next” is pressed.

  FIG. 4 is a notification screen for setting a download status displayed when “Next” is pressed on the download means selection screen shown in FIG. That is, after selecting the download means on the screen of FIG. 3, a screen for newly setting a notification date of the download status is displayed on the screen of FIG. Then, in order to confirm the number of days after which the sender will be notified of the download status, a registration operation for transmitting a confirmation mail is performed and “Done” is pressed.

  After pressing the “Done” button, the digital multi-function peripheral 1 transmits an e-mail to the destination user terminal. At this time, link destination information for downloading is described in the body of the e-mail. For example, the URL is described as https: //Xxxx/Aaaaa/Cccc/Www.Pdf. At this time, the user terminal can download the necessary file by clicking the link destination information after receiving the e-mail. In addition, after sending the e-mail, at the time when the timer 7 counts and issues a notification mail, an e-mail is sent to notify the transmission destination user terminal of the download status. To do. The e-mail transmission date is counted by the timer 7 of the image forming apparatus 1.

  As described above, when the image capture size exceeds the preset size, the digital multi-function peripheral according to Embodiment 1 of the present invention displays that fact on the screen. At this time, even if “Scan To PC” is specified, if the set size is exceeded, the link destination information is notified to the user terminal by e-mail. In addition, when notifying link destination information to the user terminal, a data download method is selected. Furthermore, the digital multi-function peripheral of the present invention confirms the download status by the user terminal.

  Therefore, according to the digital multifunction peripheral of the present invention, large image data can be transmitted without imposing a load on the server. Furthermore, it is possible to cover the state of a mailer that cannot receive a divided electronic mail. In addition, since a transmission form such as a download method can be selected at the time of issuing an e-mail, selection according to the environment of the infrastructure can be performed. Furthermore, the sender can reliably grasp whether or not the file has been downloaded at the user terminal.

  In the digital multi-function peripheral of the first embodiment described above, when the link destination information is notified to the user terminal, the download method (or download means) is selected and the download status is notified from the user terminal. However, this method is only a notification of the download status, and in a digital multi-function peripheral equipped with a function to delete saved documents on the HDD, the saved text will be deleted when the deadline comes even if the download is not completed. End up. Therefore, in order to resolve such problems, if the download deadline of the stored document approaches, if the user terminal of the transmission destination has not completed the download, the stored text will be deleted within the predetermined time limit. It is desirable to add a function to deliver the warning email shown.

  However, if all the user terminals at the transmission destination complete the download before the download deadline of the stored document, the transmission file remains in the HDD in the digital multi-function peripheral and continues to occupy the storage area. Therefore, in addition to “Scam To E-Mail”, a function to automatically delete the saved document when all the user terminals of the transmission destination complete the download before the deadline for downloading the saved document is added. Is desirable.

<Embodiment 2>
FIG. 5 is a configuration diagram of a digital multi-function peripheral applied to Embodiment 2 of the present invention. The digital multifunction peripheral 1a according to the second embodiment illustrated in FIG. 5 stores a transmission record of data such as link destination information transmitted to each user terminal with respect to the digital multifunction peripheral 1 according to the first embodiment illustrated in FIG. A data storage unit 11 is added. That is, the data storage unit 11 stores a transmission record each time data such as link destination information is transmitted to each user terminal. Therefore, if the transmission destination user terminal downloads, the recorded content of the data storage unit 11 changes to a status where the corresponding user terminal has completed the download.

  FIG. 6 is a flowchart showing a flow of processing performed by the data storage unit 11 of the digital multi-function peripheral 1a in the second embodiment shown in FIG. That is, in FIG. 6, first, the data storage unit 11 stores the scanned data (step S1). Further, the download status such as download means and download notification date is notified to all user terminals (step S2). At this time, the e-mail notified from the administrator of the digital multifunction peripheral 1a to each user terminal is “The download deadline is approaching. * Please download the file from the link below by month x day. ”And is transmitted a predetermined time before the original download deadline.

  Next, the data storage unit 11 determines whether or not all user terminals have downloaded (step S3). Here, if all the user terminals are downloading (in the case of Yes in step S3), the data stored in the data storage unit 11 is deleted (step S4).

  On the other hand, if all the user terminals have not completed downloading in step S3 (in the case of No in step S3), the data storage unit 11 reaches a predetermined time before the download deadline of the data stored in itself. It is judged whether it is (step S5). If the download deadline has not yet been reached (No in step S5), the process returns to step S2 and the above processing is repeated. If the download deadline for stored data has been reached (step S5) In the case of Yes), after data is transmitted to the undownloaded user terminal (step S6), the data stored in the data storage unit 11 is deleted (step S7). In this way, when all the user terminals of the transmission destination have completed the download, the data storage unit 11 of the digital multi-function peripheral 1a voluntarily downloads the data recorded therein, even from all the user terminals. This data is deleted before the download deadline even if it is not set.

  In this way, the digital multifunction peripheral 1a according to the second embodiment of the present invention adds a function for prompting the download to all user terminals when a predetermined time before the download deadline date is reached, and all the user terminals are downloaded. When the download is completed, the function to automatically delete the data is added even if the download deadline is not reached. Therefore, it is possible to thoroughly download, and the hard disk can be used effectively because the data stored in the data storage unit 11 is organized before the download deadline.

  In the case of performing “Scan To E-mail”, the digital multi-functional peripheral according to the first embodiment described above downloads a link method when notifying each user terminal of link destination information at the stage of divided transmission when the file size is large. Was selected and the download status was notified. Then, the user is prompted to download to all user terminals, and even if not all user terminals have downloaded, when the download deadline is reached, the data is automatically transmitted to the undownloaded terminals after being automatically transmitted. It has been deleted.

  In the second embodiment, the reminder mail is transmitted a predetermined time before the download deadline. However, the reminder mail is transmitted after the download deadline is reached, and the actual deletion is performed after the download deadline. Also good. In other words, a time such as a predetermined time before the download deadline or the download deadline is artificially determined, and a reminder mail is transmitted once or a plurality of times relatively before the actual data deletion. Any configuration can be used.

<Third embodiment>
Further, FIG. 7 is a flowchart showing the flow of processing performed by the data storage unit 11 of the digital multi-function peripheral 1 according to the third embodiment. In the third embodiment, it is assumed that an e-mail download deadline is individually set for each user terminal. That is, the download deadline date is not necessarily the same. In FIG. 7, first, the data storage unit 11 stores the scanned data (step S11). In addition, the user terminal is notified of the download status such as the download means and the three download dates and times (step S12). At this time, the e-mail notified from the administrator of the data communication device 1a to each user terminal is “The download deadline is approaching. * Please download the file from the link below by month x day. It is something like that.

  Next, the data storage unit 11 determines whether or not all user terminals have completed the download (step S13). Here, if all the user terminals have not completed downloading (in the case of No in step S13), the process proceeds to step 14 described later, and if all of the user terminals have completed downloading (in the case of Yes in step S13). ), And proceeds to step S16 described later. That is, in the case of No in step S13, it is determined whether or not the download data download deadline date has been reached for each user terminal (step S14). If the data storage unit 11 has reached the [M1] download deadline for stored data for each user terminal (Yes in step S14), the data storage unit 11 transmits the data to an undownloaded user (step S15). Then, the data of the user terminal that has reached the release date of the stored data is deleted (step S16). In this way, the processing of each step described above is returned and repeated for each user terminal until the stored data release date is reached (step S17). When all user terminals have reached the stored data release date, the stored data is stored. Delete data. If it is determined No in step S14, the process returns to step S12 and the processes up to step S14 are repeated.

  That is, in the digital multi-function peripheral according to the third embodiment, when the file download is not completed even when the data stored in the HDD is deleted, the digital multi-function peripheral 1 determines that the corresponding user terminal of the transmission destination Automatically sends a reminder email to download the file. In addition, the data communication device is initialized in advance so as to save the file for a predetermined number of days after delivery of the download reminder e-mail. Such an individual download prompting process is repeatedly performed until all the user terminals at the transmission destination complete the download.

  According to the digital multi-function peripheral of the third embodiment, when a predetermined time limit comes, it is possible to automatically deliver an e-mail to a user terminal that has not been downloaded and prompt the download. Further, it is possible to prevent a file that has not been downloaded even if the file download deadline has been reached from being automatically deleted. Furthermore, the extended storage period of the file can be arbitrarily designated.

<Summary>
As described above, in each of the above embodiments, a digital multi-function peripheral is used as an example of a data communication device. However, the data communication device transmits data to a large number of user terminals by “Scan to E-mail”. At that time, the download status is notified to each user terminal. At this time, if the data stored in the HDD is automatically deleted when all the user terminals have completed the download, the data stored in the HDD is deleted even if the download deadline is not reached. Therefore, the data communication apparatus of the present invention distributes an e-mail that prompts download to the undownloaded target terminal on the notification day of the download status. At this time, the data communication apparatus is configured to receive a reply mail indicating that it has been received from the user terminal in order to obtain reception confirmation and reception history. In the second and third embodiments, when the download deadline has arrived or when a predetermined time has elapsed from the download deadline, a reminder mail is transmitted to the user terminal. However, it is also possible to adopt a configuration in which the setting of the download deadline date can be changed at the user terminal on the condition that it is received.

  In addition, the data communication device does not immediately delete the data even when the download time limit of the data stored in the HDD is reached, and repeatedly prompts the user terminal that has not yet been downloaded. Then, the data stored in the HDD is deleted when all the user terminals complete the download. Note that the download deadline of data stored in the HDD can be set such that a file to be downloaded is excluded at the initial setting of the data communication apparatus.

  As for the data deletion method, there are a method of deleting data after saving a predetermined file and a method of deleting data after notifying the user terminal. In the former method of deleting the data after saving the predetermined file, the address information of each user terminal is stored in the data communication device. Therefore, if “Scan to PC” information is also set, a certain period of time It is possible to take measures such as sending a file to be deleted to the user terminal at the time when elapses, and then deleting the data.

  Further, in the latter method of deleting data after notifying the user terminal, a mode for ignoring the download deadline of HDD stored data is created, and the mode is selected when data is scanned. When the mode is selected, the data read in the scan is automatically saved in the user terminal by “Scan to PC”. As a result, necessary data remains in the corresponding user terminal even if the data is deleted while ignoring the download deadline of the HDD storage data.

  According to the present invention, it can be used for a digital composite such as a scanner having the functions of “Scan to E-mail” and “Scan to PC”. It can also be used as a data communication device capable of transmitting and receiving files and data realized by e-mail and FTP. Of course, the data communication apparatus of the present invention is not limited to the scanner, and can be used as a terminal device such as a personal computer or a mobile phone. Further, it can be used as a program for controlling the data communication apparatus of the present invention. The program in this case can also be used as a personal computer software.

1 is a configuration diagram of a digital multi-function peripheral that is applied to Embodiment 1 of the present invention. FIG. FIG. 3 is a diagram showing a warning message of exceeding a specified size displayed on the screen of the operation unit 6 in the digital multi-function peripheral 1 shown in FIG. 1. FIG. 3 is a diagram showing a download means selection screen displayed when “Next” is pressed on the transmission size limit excess screen shown in FIG. 2. FIG. 4 is a notification screen for setting a download status displayed when “Next” is pressed on the download means selection screen shown in FIG. 3. It is a block diagram of the digital multi-function peripheral applied to Embodiment 2 of this invention. 6 is a flowchart showing a flow of processing performed by a data storage unit 11 of the digital multi-function peripheral 1a according to Embodiment 2 shown in FIG. 14 is a flowchart illustrating a flow of processing performed by the data storage unit 11 of the digital multi-function peripheral 1 according to the third embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 1a Digital multifunction device 2 Document taking-in part 3 Image storage part 4 Web server 5 FTP server 6 Operation part 7 Timer 8 SMTP protocol 9 SMB protocol 10 Communication part 11 Data storage part

Claims (7)

A data communication device that reads desired data and transmits it to a user terminal,
A function of determining whether or not the capacity of the data exceeds a preset size, and when it is determined to exceed, a function of displaying information indicating that on the screen;
A function of notifying the user terminal of link destination information when the data exceeds the set size and selecting a download method for downloading the data;
A function for checking the download status of the data;
A function of transmitting desired data to a corresponding user terminal based on a selected download method when the data download deadline has arrived;
A function of deleting the desired data after transmitting the desired data;
A data communication apparatus comprising: The data communication apparatus according to claim 1, further comprising a function of transmitting a warning e-mail indicating that the data download deadline is near to the user terminal a predetermined time before the data download deadline. . The data communication apparatus according to claim 2, further comprising a function of automatically deleting the data before reaching the download deadline when all the user terminals have completed downloading the data. The function according to claim 1 or 2, further comprising a function of transmitting a reminder e-mail to prompt a download to a user terminal that has not completed downloading of the data in accordance with a confirmation result of the download status. 2. The data communication device according to 2. 5. The data communication apparatus according to claim 1, further comprising a function capable of arbitrarily setting a download deadline for the data. A program for causing a computer to execute a data transmission method for transmitting data read by a data communication device to a user terminal,
A procedure for determining whether or not the capacity of the data exceeds a preset size, and when it is determined to exceed, a procedure for displaying information indicating that on the screen;
A procedure for notifying the user terminal of link destination information when the data exceeds the set size and selecting a download method for downloading the data;
A procedure for checking the download status of the data;
A procedure for transmitting desired data to a corresponding user terminal based on the selected download method when the data download deadline has arrived;
A procedure of deleting the data after transmitting the desired data;
A program that causes a computer to execute. In accordance with the result of checking the download status, a procedure for sending a reminder e-mail to remind the user terminal that the download of the data has not been completed;
Sending a warning email indicating that the data download deadline is near to the user terminal a predetermined time before the data download deadline;
When all the user terminals have completed downloading the data, a procedure for automatically deleting the data before the date for reaching the download deadline;
The program according to claim 6, which is added to the computer and executed by the computer.

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