JP2007208752A - Communication system and communication terminal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a communication terminal capable of being made small in size and low in cost. <P>SOLUTION: The first communication terminal 3 includes: a transmission reception section 57 for executing the transmission of image data by a facsimile machine utilizing the Internet 9; and a transmission entrusting section 59 that entrusts the second communication terminal 5 by the execution of the transmission of image data whose transmission is failed to a destination by means of the facsimile machine utilizing a public switched telephone network 11 when the transmission of the image data to the destination by the transmission reception section 57 is failed, wherein the second communication terminal 5 has a function of executing the transmission of image data by the facsimile machine utilizing the Internet 9 and the public switched telephone network 11. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a communication system and a communication terminal apparatus that perform transmission / reception of image data by facsimile.

  2. Description of the Related Art Conventionally, there is a communication terminal device that has both functions of facsimile communication using the Internet and facsimile communication using a public switched telephone network. Some of them have a function of automatically switching to facsimile transmission using the Internet when image data transmission fails continuously for a predetermined number of times by facsimile using the public switched telephone network (for example, patents). Reference 1).

In addition, instead of a terminal device that does not have a facsimile communication function using the public switched telephone network, it receives image data transmitted by a facsimile using the public switched telephone network and converts the received image data into an e-mail. There is a FAX gateway device that converts and transmits it to the terminal device (for example, see Patent Document 2).
JP 2000-307795 A JP-A-9-102798

  A communication terminal device having a function of facsimile communication using the Internet usually has a function of facsimile communication using a public switched telephone network. This is to substitute facsimile communication using the public switched telephone network when facsimile communication on the Internet fails.

  However, if the communication terminal device has facsimile communication using the Internet and the public switched telephone network, the number of parts increases accordingly, and the communication terminal device becomes larger and more expensive.

  An object of the present invention is to provide a communication terminal device and a communication system that can be reduced in size and price.

  A communication system according to the present invention is a communication system including first and second communication terminal devices, and the first communication terminal device includes a transmission unit that transmits image data by facsimile using the Internet. A transmission delegation unit that delegates transmission of the image data that failed to be transmitted to the other party to the second communication terminal device when transmission of the image data to the other party by the transmission unit has failed, The second communication terminal device includes a first transmission unit that transmits image data by facsimile using the Internet, and a second transmission unit that transmits image data by facsimile using a public switched telephone network. And a transmission delegation unit that causes the second transmission unit to execute transmission of the image data that failed to be transmitted to the other party when the delegation is performed.

  In the communication system according to the present invention, the transmission delegation unit includes first destination information for specifying the destination in a facsimile using the Internet, together with image data that has failed to be sent to the destination. The second communication terminal device associates the first destination information with the second destination information for specifying the other party in a facsimile using a public switched telephone network. A correspondence storage unit for storing, and when the delegation is delegated, the transmission destination unit converts the first destination information into the second destination information based on the correspondence and fails in transmission Transmission of the image data to the destination can be performed by the second transmission unit based on the second destination information.

  In the communication system according to the present invention, the first communication terminal device determines the destination in the facsimile using the public exchange telephone network and the first destination information for specifying the destination in the facsimile using the Internet. An association storage unit that associates and stores second destination information for identification; and when the transmission unit fails to transmit image data to the other party, the transmission delegation unit The first destination information is converted into the second destination information, and the second destination information is transmitted to the second communication terminal device together with the image data that has failed to be transmitted to the destination. The transmission entrusting unit of the second communication terminal apparatus transmits the image data that has failed to be transmitted to the other party, the image data transmitted from the transmission delegation unit, and the second destination. Based on the distribution, to be executed by the second transmission unit may be so.

  In the communication system according to the present invention, the second communication terminal device converts the image data that has failed to be transmitted to the other party from a facsimile using the Internet to a facsimile using the public switched telephone network. The transmission accepting unit may include a data conversion unit, and cause the second transmission unit to execute the transmission of the image data that has failed to be transmitted to the destination with the converted image data.

  In the communication system according to the present invention, the image data that has failed to be transmitted to the other party is transmitted from the first communication terminal apparatus to the second communication terminal apparatus by a facsimile protocol using the Internet. Can be.

  In the communication system according to the present invention, a dial-in number is assigned to the first communication terminal device, and the second communication terminal device receives image data by facsimile using the Internet. Image data transmitted to the first communication terminal device using the dial-in number as the destination information and receiving the image data by a facsimile using a public switched telephone network. A second receiving unit that performs reception instead of the terminal device, and a transfer unit that transfers image data received by the second receiving unit to the first communication terminal device to the first communication terminal device And can be included.

  A communication terminal device according to the present invention includes a transmission unit that transmits image data by facsimile using the Internet, and the Internet and a public exchange telephone network when the transmission of image data to the other party by the transmission unit fails. For other communication terminal devices having a function of executing transmission of image data by using a facsimile, transmission of image data having failed to be transmitted to the other party is performed by facsimile using a public switched telephone network. A transmission delegation unit that delegates

  According to the communication system of the present invention, even if the first communication terminal apparatus fails to transmit image data to the other party by facsimile using the Internet, it delegates this to the second communication terminal apparatus. It can be transmitted to the other party by facsimile using a public switched telephone network. Therefore, according to the communication system according to the present invention, even if the first communication terminal device does not have the function of facsimile communication using the public switched telephone network, the same use as that provided can be performed. Since the first communication terminal apparatus does not require parts (such as a modem) necessary for facsimile communication using the public switched telephone network, it can be reduced in size and price.

  The communication terminal device according to the present invention has a function of executing image data transmission by facsimile using the Internet and the public switched telephone network when transmission of image data to the other party fails by facsimile using the Internet. It is entrusted to other communication terminal devices that have the image data that failed to be transmitted to the other party by facsimile using the public switched telephone network. Therefore, the communication terminal apparatus according to the present invention can be used in the same way as provided without the function of facsimile communication using the public switched telephone network. Since the communication terminal device does not require parts (such as a modem) necessary for facsimile communication using the public switched telephone network, it can be reduced in size and price.

  Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a communication system 1 according to the first embodiment. The communication system 1 has a configuration in which a first communication terminal device 3 and a second communication terminal device 5 are connected by a LAN 7. There are a plurality of first communication terminal apparatuses 3, which have a function of facsimile communication using the Internet 9, but do not have a function of facsimile communication using the public switched telephone network 11. On the other hand, the second communication terminal device 5 is a single device and has both a facsimile communication function using the Internet 9 and a facsimile communication function using the public switched telephone network 11.

  First, a digital multi-function peripheral used as the first communication terminal device 3 or the second communication terminal device 5 will be described. FIG. 2 is a block diagram showing a configuration of the digital multifunction machine 13 used as the first communication terminal device 3. The digital multifunction machine 13 has functions of a copy, a printer, a scanner, and a facsimile. The digital multifunction machine 13 can be used as the first communication terminal device 3 by the facsimile function.

  In the digital multifunction device 13, a control unit 15, an image reading unit 17, an image recording unit 19, a display unit 21, an operation unit 23, a ROM 25, a RAM 27, an image memory 29, a codec 31, and a LAN interface 33 are connected to each other via a bus 35. Have a configuration. The control unit 15 is realized by, for example, a CPU, and controls the hardware configuring the digital multi-function peripheral 13 and executes software necessary for the operation of the digital multi-function peripheral 13.

  The image reading unit 17 reads an image (character, figure, photograph, etc.) with a CCD or the like and outputs it as image data. The image recording unit 19 is an electrophotographic printer, and returns image data output from the image reading unit 17 or image data from another facsimile apparatus received by facsimile to an image, and a sheet on which the image is recorded. Is output.

  The display unit 21 displays the operation state of the digital multifunction device 13, the name of the other party, various setting contents, and the like. The display unit 21 is realized by an LCD, a CRT, or the like. The operation unit 23 includes keys (such as a numeric keypad, an abbreviated key, a one-touch key, a start key, a reset key, and various function keys) necessary for operating the digital multifunction peripheral 13.

  The ROM 25 stores software necessary for the operation of the digital multifunction machine 13. The RAM 27 is realized by SRAM, DRAM, flash memory, or the like, and temporarily stores data generated when software is executed.

  The image memory 29 is realized by a DRAM or the like, and temporarily stores image data to be transmitted, received image data, image data output from the image reading unit 17, and the like. The codec 31 encodes and compresses image data and decodes the image data that has been encoded and compressed. The LAN interface 33 is an interface through which the digital multifunction device 13 is communicably connected to the LAN 7. The LAN 7 is connected to the Internet 9 via the router 37.

  Next, a digital multifunction peripheral used as the second communication terminal device 5 will be described. FIG. 3 is a block diagram showing a configuration of the digital multi-function peripheral 39. The configuration of the digital multifunction device 39 is different from that of the digital multifunction device 13 in that a modem 41 and an NCU 43 are provided. Thereby, the second communication terminal device 5 has a function of facsimile communication using the public switched telephone network 11.

  The modem 41 performs modulation / demodulation between the audio signal and the digital signal. The NCU 43 controls the connection between the telephone line connected to the public switched telephone network 11 and the digital multi-function peripheral 39.

  A functional block of the first communication terminal device 3 will be described with reference to FIG. The first communication terminal device 3 includes an input / output unit 51, an image data storage unit 53, a destination information storage unit 55, a transmission / reception unit 57, and a transmission delegation unit 59.

  The input / output unit 51 specifies (a) designation of first destination information by a user operation when transmitting image data from the first communication terminal device 3 to a destination by facsimile using the Internet 9; (b) It has an input function such as reading an image for generating the image data to be transmitted. The first destination information is information for specifying a destination in a facsimile using the Internet, and specifically, is a mail address or an IP (Internet Protocol) telephone number. In the present invention, the other party is a communication terminal device other than the first communication terminal device 3 and the second communication terminal device 5 constituting the communication system 1 and can communicate with the communication system 1. Refers to the device.

  The input / output unit 51 includes (a) image data transmitted from the other party to the first communication terminal device 3 by facsimile using the Internet 9, and (b) the second communication terminal device via the LAN 7. 5 has an output function for printing out or displaying the image data transferred from 5 to the first communication terminal apparatus 3. (B) is one of the features of the communication system 1. That is, since the first communication terminal apparatus 3 does not have a function of facsimile communication using the public switched telephone network 11, transmission from the other party to the first communication terminal apparatus 3 by facsimile using the public switched telephone network 11. The image data thus received is received by the second communication terminal device 5 instead of the first communication terminal device 3, and the received image data is transferred to the first communication terminal device 3.

  The image data stored in the image data storage unit 53 includes (a) an image read by the input / output unit 51 (that is, image data transmitted from the first communication terminal device 3 to the other party by facsimile using the Internet). (B) image data transmitted from the other party to the first communication terminal apparatus 3 by facsimile using the Internet 9; (c) transferred from the second communication terminal apparatus 5 to the first communication terminal apparatus 3; Image data (this image data is image data transmitted from the other party to the first communication terminal device 3 by the facsimile using the public switched telephone network 11 as described above), etc. . Since the first communication terminal device 3 performs facsimile communication using the Internet 9, the format of the image data stored in the image data storage unit 53 is the TIFF format or the like.

  The destination information storage unit 55 stores the first destination information of the destination input from the input / output unit 51.

  The transmission / reception unit 57 performs transmission and reception of image data by facsimile using the Internet 9. In the case of a mail address, transmission / reception with the other party is executed using a protocol such as SMTP (Simple Mail Transfer Protocol). On the other hand, in the case of an IP telephone number, transmission / reception with the other party is executed using a predetermined protocol such as SIP (Session Initiation Protocol).

  When the transmission / reception unit 57 fails to transmit the image data to the other party, the transmission delegation unit 59 delegates the transmission of the image data that has failed to the second party to the second communication terminal device 5. This is one of the features of the communication system 1. As a result, even if the first communication terminal apparatus 3 does not have a function of facsimile communication using the public switched telephone network 11, the image in which the first communication terminal apparatus 3 failed to transmit by facsimile using the Internet 9 is used. Data can be transmitted to the other party by facsimile using the public switched telephone network 11. When delegating, the transmission delegation unit 59 transmits the first destination information of the other party to the second communication terminal device 5 together with the image data that has failed to be transmitted to the other party.

  Next, functional blocks of the second communication terminal device 5 will be described. The second communication terminal device 5 includes an input / output unit 71, an image data storage unit 73, a destination information storage unit 75, a first transmission / reception unit 77, a second transmission / reception unit 79, a transmission acceptance unit 81, a transfer unit 83, an image. A data conversion unit 85 and an association storage unit 87 are provided.

  The input / output unit 71 (a) designates first destination information by a user operation when transmitting image data from the second communication terminal device 5 to a destination by facsimile using the Internet 9; (b) When image data is transmitted from the second communication terminal device 5 to the other party by facsimile using the public switched telephone network 11, designation of second destination information by the user's operation, (c) (a) (b ) Has an input function such as reading an image for generating image data to be transmitted.

  The first destination information is as described above. The second destination information is information for specifying the other party in the facsimile using the public switched telephone network 11, and is specifically a facsimile number.

  The input / output unit 71 includes (a) image data transmitted from the other party to the second communication terminal device 5 by facsimile using the Internet 9, and (b) other party by facsimile using the public switched telephone network 11. It has an output function for printing out or displaying the screen of image data transmitted from the first to the second communication terminal device 5.

  The image data stored in the image data storage unit 73 includes (a) an image read by the input / output unit 71 (that is, using the Internet 9 or the public switched telephone network 11 from the second communication terminal device 5 to the other party). Image data transmitted by facsimile), (b) image data transmitted from the other party to the second communication terminal 5 by facsimile using the Internet 9 or the public switched telephone network 11, and (c) the public switched telephone network 11 The image data transmitted from the other party to the first communication terminal device 3 by the facsimile using the above (this image data is transferred from the second communication terminal device 5 to the first communication terminal device 3). (D) When the transmission / reception unit 57 of the first communication terminal apparatus 3 fails to transmit the image data to the other party, the transmission delegation unit 59 delegates the transmission. Image data, and the like.

  The format of the image data stored in the image data storage unit 73 is the TIFF format in the case of a facsimile using the Internet 9, and the MH, MR, MMR, JBIG format in the case of a facsimile using the public switched telephone network 11. Etc.

  The destination information storage unit 75 stores first destination information, second destination information, and the like of the destination input from the input / output unit 71.

  The first transmission / reception unit 77 performs transmission and reception of image data by facsimile using the Internet 9. Transmission / reception of image data with the other party is executed in the same manner as the transmission / reception unit 57.

  The second transmission / reception unit 79 transmits and receives image data by facsimile using the public switched telephone network 11. The second transmission / reception unit 79 substitutes the first communication terminal device 3 for the image data transmitted from the other party to the first communication terminal device 3 by facsimile using the public switched telephone network 11. And execute reception. The destinations of the first communication terminal device 3, the second communication terminal device 5, and the other party are specified by facsimile numbers. The second transmission / reception unit 79 uses a facsimile communication protocol such as G3 or G4, and executes transmission / reception of image data with the other party via the public switched telephone network 11.

  The transmission accepting unit 81, when the transmission delegation unit 59 of the first communication terminal device 3 delegates the transmission of the image data that has failed to be transmitted to the other party, to the other party of the image data that has failed to be transmitted. The second transmitting / receiving unit 79 executes transmission.

  The transfer unit 83 transfers the image data destined for the first communication terminal device 3 received by the second transmission / reception unit 79 to the first communication terminal device 3.

  The image data conversion unit 85 converts the image data that has been transmitted to the transmission accepting unit 81 and failed to be transmitted to the other party from a facsimile using the Internet 9 to a facsimile using the public switched telephone network 11. . The image data conversion unit 85 also has a function of converting image data from a facsimile using the public switched telephone network 11 to a facsimile using the Internet 9. Since the second communication terminal device 5 includes the image data conversion unit 85, each first communication terminal device 3 does not need to include the image data conversion unit 85, and thus the first communication terminal device 3 can be downsized. In addition, the price can be reduced.

  The protocol for exchanging image data between the first communication terminal device 3 and the second communication terminal device 5 is a facsimile protocol using the Internet (for example, ITU-T recommendation T.37). Therefore, since the image size, resolution, and the like are determined, the image data conversion unit 85 can easily convert the image data as compared with the case where the image data is exchanged by e-mail. The transmission acceptance unit 81 causes the second transmission / reception unit 79 to execute transmission of the image data that has failed to be transmitted to the other party using the converted image data.

  In the association storage unit 87, for example, as shown in FIG. 4, a destination mail address (first destination information) and a facsimile number (second destination information) are stored in association with each other. This association is used in the transmission operation of the communication system 1 described later. In addition, in the association storage unit 87, for each of the three first communication terminal apparatuses 3 shown in FIG. 1, for example, as shown in FIG. A dial-in number (facsimile number) assigned to each communication terminal device 3 is stored in association with each other. This association is used in the receiving operation of the communication system 1 described later. 4 and 5, the first destination information is a mail address, but an IP address may be used instead of the mail address.

  The functions of the input / output units 51 and 71 as the input unit are realized by the image reading unit 17 and the operation unit 23 shown in FIGS. On the other hand, the function as the output unit of the input / output units 51 and 71 is realized by the image recording unit 19 and the display unit 21. The functions of the image data storage units 53 and 73 are realized by the image memory 29. The functions of the destination information storage units 55 and 75 are realized by the RAM 27. The functions of the transmission / reception unit 57, the transmission delegation unit 59, the first transmission / reception unit 77, the transmission reception unit 81, and the transfer unit 83 are realized by the control unit 15, the LAN interface 33, and the like. The function of the second transmission / reception unit 79 is realized by the control unit 15, the modem 41, the NCU 43, and the like. The function of the image data conversion unit 85 is realized by the control unit 15, the ROM 25, and the RAM 27. The function of the association storage unit 87 is realized by the RAM 27.

  Next, among the transmission operations of the communication system 1, the transmission operation that is a feature of the first embodiment will be described with reference to FIGS. 1, 4, 6, and 7. 6 and 7 are flowcharts for explaining the transmission operation that is the above feature.

  It is determined whether transmission of image data to the other party using the first communication terminal device 3 has failed (step S1). Transmission is performed by facsimile using the Internet 9 by the transmission / reception unit 57. Here, transmission of image data to the other party has been attempted a plurality of times, but if it has not succeeded, it is determined to have failed. If there is no failure, that is, if the image data can be transmitted to the other party by facsimile using the Internet 9, the process ends.

  On the other hand, if it fails, the transmission delegation unit 59 entrusts the transmission of the image data that failed to be transmitted to the second communication terminal apparatus 5 (step S3). Specifically, the transmission delegation unit 59 sends, via the LAN 7, a command to be executed by the second communication terminal device 5 instead of the first communication terminal measure 3 to transmit the image data that has failed to be transmitted to the other party. It is sent to the second communication terminal device 5. At the time of this delegation, the transmission delegation unit 59 reads out the same image data as the image data that failed to be transmitted from the image data storage unit 53 and also reads out the first destination information of the other party from the destination information storage unit 55. The image data and the first destination information are transmitted to the second communication terminal device 5 via the LAN 7.

  The transmission accepting unit 81 of the second communication terminal device 5 accepts the entrustment from the transmission delegation unit 59 of the first communication terminal device 3 (step T1). The image data and the first destination information of the other party transmitted from the transmission delegation unit 59 to the transmission acceptance unit 81 at the time of delegation are stored in the image data storage unit 73 and the destination information storage unit 75, respectively.

  The image data stored in the image data storage unit 73 (that is, the image data that failed to be transmitted to the other party) is sent from the facsimile using the Internet 9 to the facsimile using the public switched telephone network 11 in the image data conversion unit 85. The data format is converted for use. Also, the transmission accepting unit 81 associates the first destination information stored in the destination information storage unit 75 (that is, the first destination information transmitted from the transmission delegation unit 59) with the correspondence shown in FIG. The first destination information (mail address) of the other party is converted into second destination information (facsimile number) based on the above (step T3).

  The transmission accepting unit 81 causes the second transmission / reception unit 79 to transmit the image data converted for facsimile using the public switched telephone network 11 to the other party based on the second destination information (step). T5). As described above, the image data that the first communication terminal apparatus 3 failed to transmit by facsimile using the Internet 9 can be transmitted by the second communication terminal apparatus 5 by facsimile using the public switched telephone network 11.

  Next, of the reception operations of the communication system 1, the reception operation that is a feature of the first embodiment will be described with reference to FIGS. 1, 5, and 8. FIG. 8 is a flowchart for explaining the reception operation as the above feature.

  The first communication terminal device 3 does not have a function of facsimile communication using the public switched telephone network 11, but the destination uses a facsimile using the public switched telephone network 11 for the first communication terminal device 3. As shown in FIG. 5, dial-in numbers are respectively assigned to the three first communication terminal devices 3 so that the image data can be transmitted. The second communication terminal device 5 is also assigned a dial-in number (for example, 000-111-0000). Of the four dial-in numbers, one is a subscriber line number and the remaining three are additional numbers. The second communication terminal device 5 has a dial-in function because it receives the image data whose destination is specified by the dial-in number.

  When the other party transmits image data by facsimile using the public switched telephone network 11 with any one of the four dial-in numbers as destination information, the image data is transmitted to the second transmission / reception unit 79 of the second communication terminal device 5. (Step U1). The second communication terminal device 5 determines whether or not the dial-in number serving as the destination information of the received image data is the same as the dial-in number assigned to the second communication terminal device 5 (step U3). In the same case, the received image data is output from the second communication terminal device 5 (step U5).

  On the other hand, if they are not the same, that is, if the dial-in number is assigned to one of the first communication terminal apparatuses 3, it is determined which of the first communication terminal apparatuses 3 is the destination from the association shown in FIG. (Step U7). The received image data is converted in data format by the image data conversion unit 85 from a facsimile using the public switched telephone network 11 to a facsimile using the Internet 9.

  The converted image data is transferred via the LAN 7 by the transfer unit 83 to the first communication terminal device 3 having the mail address corresponding to the dial-in number designated as the destination of the received image data (step U9).

  As described above, according to the communication system 1 according to the first embodiment, transmission of image data to the other party using the function of facsimile communication using the Internet 9 provided in the first communication terminal device 3 has failed. Also, the transmission of the image data is delegated to the second communication terminal device 5, and the second communication terminal device 5 transmits the image data delegated to the transmission to the other party by facsimile using the public switched telephone network 11. To do. Also, image data transmitted from the other party to the first communication terminal apparatus 3 by facsimile using the public switched telephone network 11 is received by the second communication terminal apparatus 5 instead of the first communication terminal apparatus 3. And transferred to the first communication terminal device 3.

  Therefore, according to the communication system 1, even if the first communication terminal device 3 does not have a function of facsimile communication using the public switched telephone network 11, the same use as that provided can be performed. Since the first communication terminal device 3 does not require parts (such as a modem) necessary for facsimile communication using the public switched telephone network 11, it can be reduced in size and price. Further, since the telephone line does not need to be contracted for the first communication terminal device 3, the operation cost of the communication system 1 can be suppressed.

  Since the second communication terminal device 5 performs image transmission / reception by facsimile using the public switched telephone network 11 instead of the first communication terminal device 3, there is a possibility that a load is applied. Therefore, it is conceivable to assign a high-end machine to the second communication terminal device 5. On the other hand, since the first communication terminal device 3 does not have a function of facsimile communication using the public switched telephone network 11, it is conceivable to assign a low-end machine to the first communication terminal device 3.

  Even if the other party does not make any special settings, the first communication terminal apparatus 3 that does not have the function of facsimile communication using the public switched telephone network 11 is connected to the first communication terminal apparatus 3 by facsimile using the public switched telephone network 11. Image data can be transmitted.

  As shown in FIG. 1, a plurality of first communication terminal devices 3 and second communication terminal devices 5 constituting the communication system 1 are connected by a LAN 7. This is the case, for example, when a certain company constructs the communication system 1 in the same building. However, these communication terminal devices may be connected via the Internet 9 instead of the LAN 7. This is, for example, a case where the communication system 1 is constructed by a company head office and a plurality of branch offices.

  Next, a second embodiment will be described. FIG. 9 is a block diagram showing a configuration of a communication system 91 according to the second embodiment. The difference between the communication system 91 according to the second embodiment and the communication system 1 according to the first embodiment shown in FIG. 1 will be described.

  In the communication system 1 according to the first embodiment, the correspondence between the first destination information (mail address) and the second destination information (facsimile number) of the destination as shown in FIG. 5 association storage unit 87. On the other hand, in the communication system 91 according to the second embodiment, each first communication terminal device 3 includes an association storage unit 93 that stores associations as illustrated in FIG.

  Therefore, in the second embodiment, when the first communication terminal device 3 fails to transmit image data to the other party by facsimile using the Internet 9, the transmission delegation unit 59 is stored in the association storage unit 93. The first destination information is converted into the second destination information based on the association. Then, the transmission delegation unit 59 transmits the second destination information to the second communication terminal device 5 together with the image data that has failed to be transmitted to the other party. For example, the second destination information is added to the header of the mail and transmitted to the second communication terminal device 5.

  Note that the second destination information may be transmitted to the second communication terminal device 5 as follows. The mail address of the second communication terminal device 5 is set to a mail address having the second destination information of the other party as the user login name. For example, if the mail address of the second communication terminal device 5 is 111-000-2222@aaa.bbbb.co.jp, 111-000-2222 before @ is the second destination information (facsimile of the other party). Number). Since the user login name changes depending on each destination, the mail address of the second communication terminal device 5 changes according to the destination. Therefore, the correspondence storage unit 93 stores the mail address of the second communication terminal device 5 that uses the second destination information of the destination as the user login name instead of the destination facsimile number (second destination information). Will be stored.

  When the correspondence between the first destination information and the second destination information of the counterpart is stored in the correspondence storage unit 87 of the second communication terminal device 5, if the number of counterparts is large, the correspondence storage unit The amount of memory allocated to 87 becomes enormous. Therefore, the second embodiment is effective when the number of counterparts is large.

  A third embodiment will be described. FIG. 10 is a block diagram showing the configuration of the communication system 101 according to the third embodiment. The difference between the communication system 101 according to the third embodiment and the communication system 1 according to the first embodiment shown in FIG. 1 will be described.

  In the communication system 101 according to the third embodiment, the second communication terminal device 5 is provided with a server 103 for performing facsimile using the Internet 9. Therefore, the transmission / reception unit 57 of the first communication terminal device 3 and the first transmission / reception unit 77 of the second communication terminal device 5 transmit image data directly to the other party, When receiving image data from the destination, the image data is received via the server 103. Therefore, the image data received by the server 103 does not use the SMTP (Simple Mail Transfer Protocol) but uses the POP (Post Office Protocol) and uses the first communication terminal device 3 and the second communication terminal device. Sent to 5.

It is a block diagram which shows the structure of the communication system which concerns on 1st Embodiment. It is a block diagram which shows the structure of the digital multifunctional device used as a 1st communication terminal device. It is a block diagram which shows the structure of the digital multifunctional device used as a 2nd communication terminal device. It is a figure which shows matching with the other party's mail address (1st destination information) and a facsimile number (2nd destination information) memorize | stored in the matching memory | storage part with which a 2nd communication terminal device is equipped. Each mail address of the first communication terminal device and a dial-in number (facsimile number) assigned to each of the first communication terminal devices stored in the association storage unit provided in the second communication terminal device FIG. It is a flowchart explaining the operation | movement by the side of the 1st communication terminal device among transmission operation | movement of the communication system which concerns on 1st Embodiment. It is a flowchart explaining the operation | movement by the side of a 2nd communication terminal device among transmission operation | movement of the communication system which concerns on 1st Embodiment. It is a flowchart explaining the reception operation | movement of the communication system which concerns on 1st Embodiment. It is a block diagram which shows the structure of the communication system which concerns on 2nd Embodiment. It is a block diagram which shows the structure of the communication system which concerns on 3rd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Communication system, 7 ... LAN, 13, 39 ... Digital compound machine, 91, 101 ... Communication system

Claims (7)

A communication system comprising first and second communication terminal devices,
The first communication terminal device is:
A transmission unit for transmitting image data by facsimile using the Internet;
A transmission delegation unit that entrusts transmission of the image data that failed to be transmitted to the other party to the second communication terminal device when transmission of the image data to the other party by the transmission unit has failed,
The second communication terminal device
A first transmission unit that performs transmission of image data by facsimile using the Internet;
A second transmission unit for transmitting image data by facsimile using a public switched telephone network;
And a transmission delegation unit that causes the second transmission unit to execute transmission of the image data that has failed to be transmitted to the destination when the delegation is performed. The transmission delegation unit transmits first destination information for specifying the other party in a facsimile using the Internet to the second communication terminal apparatus together with image data for which transmission to the other party has failed,
The second communication terminal device
An association storage unit that associates and stores the first destination information and second destination information for specifying the destination in a facsimile using a public switched telephone network;
When the delegation is delegated, the transmission accepting unit converts the first destination information into the second destination information based on the association, and transmits the image data that has failed to be transmitted to the other party. The communication system according to claim 1, further comprising: causing the second transmission unit to execute based on the second destination information. The first communication terminal device is:
Correspondence in which first destination information for specifying the destination in a facsimile using the Internet and second destination information for specifying the destination in a facsimile using a public switched telephone network are stored in association with each other Including a storage unit,
The transmission delegation unit converts the first destination information into the second destination information based on the association when transmission of image data to the other party by the transmission unit fails, and The second destination information is transmitted to the second communication terminal device together with the image data that has failed to be transmitted to the destination,
The transmission accepting unit of the second communication terminal device transmits the image data that has failed to be transmitted to the other party based on the image data and the second destination information transmitted from the transmission delegating unit. The communication system according to claim 1, wherein the second transmission unit executes the second communication unit. The second communication terminal device includes an image data conversion unit that converts image data that has failed to be transmitted to the other party from a facsimile using the Internet to a facsimile using a public switched telephone network,
The transmission acceptance unit causes the second transmission unit to execute transmission of the image data that has failed to be transmitted to the other party using the converted image data.
The communication system according to claim 2 or 3, wherein The image data that has failed to be transmitted to the other party is transmitted from the first communication terminal apparatus to the second communication terminal apparatus by a facsimile protocol using the Internet. The communication system according to any one of the above. A dial-in number is assigned to the first communication terminal device,
The second communication terminal device
A first receiving unit for receiving image data by a facsimile using the Internet;
Receiving image data by facsimile using a public switched telephone network and replacing the first communication terminal device with image data transmitted to the first communication terminal device with the dial-in number as destination information A second receiver that performs reception;
The transfer part which transfers the image data to the said 1st communication terminal device which the said 2nd receiving part received to the said 1st communication terminal device is included. The any one of Claims 1-5 characterized by the above-mentioned. The communication system according to one item. A transmission unit for transmitting image data by facsimile using the Internet;
When transmission of image data to the other party by the transmission unit fails, transmission fails to another communication terminal device having a function of executing transmission of image data by facsimile using the Internet and the public switched telephone network. And a transmission delegation unit that entrusts execution of transmission of the image data to the destination by facsimile using a public switched telephone network.

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