JP5389701B2 - Communication control device - Google Patents

Description

  The present invention relates to a communication control apparatus that controls communication via a communication network that supports both voice communication and data communication, such as NGN (next generation network).

  In NGN, an audio mode, a video mode, an application mode, and the like are defined as communication modes, and these can be appropriately selected and used. These communication modes have different types of data to be transmitted.

  However, a communication terminal connected to NGN does not necessarily support all of these communication modes. If the call destination communication terminal cannot cope with the communication in the mode selected by the call source communication terminal, the call source communication terminal is terminated as an error.

  As described above, in communication using a communication network that can selectively use a plurality of communication modes such as NGN, when a communication mode that does not match the capability of the call destination is selected at the call source, The communication could not be completed.

  Patent Document 1 discloses a technique for automatically switching between G4 mode and G3 mode in facsimile communication. However, the G4 mode and the G3 mode are both modes for transmitting image data, and are different from the communication mode in a communication network such as NGN.

  Under such circumstances, it has been demanded to increase the possibility that the communication can be completed even when the call destination cannot cope with the communication in the communication mode selected at the beginning.

  The communication control apparatus according to one aspect can selectively use a first transmission mode for transmitting voice data and a second transmission mode for transmitting data different from the voice data, and identifies a call destination The mode information communicates with the callee identified by the identification information in response to receiving call information including identification information and mode information representing the transmission mode to be used from the caller communication terminal. In the communication control device connected as the communication terminal to the communication network for notifying the communication terminal whether or not it is possible to perform in the transmission mode represented by the need to transmit the transmission target data Accordingly, a sending means for sending the call information including the mode information representing the second transmission mode to the communication network, and the calling means sent by the sending means that communication is possible. First processing means for performing a first process for transmitting the transmission target data as it is using the second transmission mode in response to being notified from the communication network as a response to information; In response to being notified from the communication network as a response to the call information sent by the sending means that communication is impossible, the transmission target data is converted into the voice data and then the first data is sent. And second processing means for performing a second process for transmitting using the transmission mode.

  It is possible to increase the possibility that the communication can be completed even when the call destination cannot cope with the communication in the initially selected communication mode.

The block diagram which shows the structure of the communication control apparatus which concerns on 1st Embodiment, and the structure of the communication system in which this communication control apparatus is included. The flowchart of the process of the main control part in FIG. The sequence diagram in connection with transmission / reception of the command of the communication control apparatus and NGN in the call processing in application mode. The sequence diagram in connection with transmission / reception of the command of the communication control apparatus and NGN in the call processing in application mode. The sequence diagram in connection with transmission / reception of the command of the communication control apparatus and NGN in the call processing in an audio mode. The flowchart of the process of the main control part in FIG. 1 in G3 FAX transmission process. The block diagram which shows the structure of the communication control apparatus which concerns on 2nd Embodiment, and the structure of the communication system in which this communication control apparatus is included. The flowchart of the process of the main control part in FIG. 7 in G3 FAX transmission process. The block diagram which shows the structure of the communication control apparatus which concerns on 3rd Embodiment, and the structure of the communication system in which this communication control apparatus is included. The flowchart of the process of the main control part in FIG. 9 in G3 FAX transmission process.

  Hereinafter, embodiments will be described with reference to the drawings.

(First embodiment)
FIG. 1 is a block diagram illustrating a configuration of a communication control device 1 according to the first embodiment and a configuration of a communication system including the communication control device 1.

  The communication system shown in FIG. 1 includes a communication control device 1, a gateway (G / W) 2, an Internet facsimile device (I-FAX) 3, a computer 4, a LAN 5, an NGN 6, a gateway 7, a communication control device 8, and an Internet facsimile device 9. Computer 10, LAN 11, gateway 12, G3 facsimile machine (G3-FAX) 13, analog network 14, and G3 facsimile machine 15.

  A gateway 2, an Internet facsimile machine 3, and a computer 4 are connected to the communication control apparatus 1 via a LAN 5. The communication control apparatus 1 performs processing for the Internet facsimile apparatus 3 and the computer 4 to communicate via the NGN 6.

  The communication control device 1 includes a LAN interface unit (LAN I / F unit) 1a, a protocol processing unit 1b, a data conversion unit 1c, a storage unit 1d, and a main control unit 1e. These units are connected to each other via a bus 1f.

  The LAN interface unit 1 a performs various known processes for exchanging data with the gateway 2, the Internet facsimile machine 3, and the computer 4 via the LAN 5.

  The protocol processing unit 1b performs processing for executing a protocol defined for communication in the NGN 6. Here, it is assumed that a protocol defined by RFC3261 is used. Therefore, the protocol processing unit 1b has a function of transmitting and receiving various commands defined by RFC3261.

  The data converter 1c converts the data format of the image data. The data converter 1c converts data that is not image data into image data.

  The storage unit 1d stores various data.

  The main control unit 1e controls each unit of the communication control device 1 as will be described later.

  The gateway 2 is connected to the NGN 6 in addition to the LAN 5. The gateway 2 includes a TEL port for connecting an analog communication terminal for the analog network 14. The gateway 2 performs various known processes for matching various differences in conditions between the LAN 5 and the analog network 14 and the NGN 6, and devices and analog communication terminals connected to the LAN 5 communicate via the NGN 6. Make it possible.

  The Internet facsimile machine 3 performs image communication via a computer network and an analog network 14. It has a LAN port for data transmission / reception via the computer network and a TEL port for signal transmission / reception via the public network. The LAN port is connected to the LAN 5 and the TEL port is connected to the TEL port of the gateway 2. The The Internet facsimile machine 3 has a so-called off-ramp function that converts data acquired via the LAN 5 into an analog facsimile transmission signal and sends it out from the TEL port.

  The computer 4 is a personal computer, for example, and is used as a terminal device that transmits and receives various digital data. The computer 4 includes a LAN interface unit and is connected to the LAN 5.

  As NGN6, for example, a communication network provided with “FLET'S Hikari Next” service by East Nippon Telegraph and Telephone Corporation and West Nippon Telegraph and Telephone Corporation can be used. In this NGN6, a call is set up according to a protocol defined by RFC3261. In NGN6, an audio mode, a video mode, and an application mode can be selectively used. The audio mode is a mode for performing voice communication. The video mode is a mode for performing moving image communication. The application mode is a mode for transmitting arbitrary digital data at high speed.

  The gateway 7 is connected to the NGN 6 and the LAN 11. The gateway 7 performs various known processes for matching the difference in various conditions between the LAN 11 and the NGN 6, and enables devices connected to the LAN 11 to communicate via the NGN 6.

  The communication control device 8 is connected to the LAN 11. The communication control device 8 performs processing for the Internet facsimile device 9 and the computer 10 to communicate via the NGN 6. The communication control device 8 has the same configuration as the communication control device 1.

  The Internet facsimile machine 9 is connected to the LAN 11. The Internet facsimile machine 9 performs image communication via a computer network.

  The computer 10 is a personal computer, for example, and is used as a terminal device that transmits and receives various digital data. The computer 4 includes a LAN interface unit and is connected to the LAN 11.

  The gateway 12 is connected to the NGN 6 and the G3 facsimile machine 13. The gateway 12 performs various known processes for matching various conditions between the LAN 11 and the analog network, and enables the G3 facsimile apparatus 13 to communicate via the NGN 6.

  The G3 facsimile apparatus 13 performs image communication according to the G3 standard. The G3 facsimile apparatus 13 is connected to the gateway 12.

  The analog network 14 is a PSTN (public switched telephone network), for example, and transmits an analog signal in a voice band. The analog network 14 is connected to the NGN 6 between the networks.

  The G3 facsimile machine 15 performs image communication according to the G3 standard. The G3 facsimile machine 15 is connected to the analog network 14.

  Next, the operation of the communication control device 1 will be described.

  When transmission target data held by the computer 4 or the Internet facsimile apparatus 3 is to be transmitted by the NGN 6 using the application mode, a request to that effect is given from the computer 4 or the Internet facsimile apparatus 3 to the communication control apparatus 1. . Upon receiving this request, in the communication control device 1, the main control unit 1e starts processing as shown in FIG.

  In step Sa1, the main control unit 1e instructs the protocol processing unit 1b to make a call in the application mode.

  Upon receiving this instruction, the protocol processing unit 1b starts calling processing according to the protocol defined by RFC3261.

  FIG. 3 is a sequence diagram related to the exchange of commands between the communication control device 1 and the NGN 6 in the calling process in the application mode. In the calling process, exchange of commands between the NGN 6 and the call destination is also performed, but this is not shown in FIG. Note that the exchange of commands with the protocol processing unit 1 b is performed with a SIP (session initiation protocol) server included in the NGN 6. The exchange of commands is performed via the bus 1f, the LAN interface unit 1a, the LAN 5, and the gateway 2.

  As shown in FIG. 3, the protocol processing unit 1b first sends an INVITE command including an identification number of a call destination and information indicating “m = application” to the NGN 6. Then, 100 (Tring) command is returned from NGN6. Thereafter, the calling destination is called from the NGN 6 and a 180 (Ringing) command indicating that the calling is in progress is sent from the NGN 6 to the protocol processing unit 1b.

  If the call destination is, for example, the Internet facsimile apparatus 9 or the computer 10, the application mode can be used by the communication control apparatus 8 controlling the communication. Therefore, in this case, a 200 (OK) command is sent from the NGN 6 to the protocol processing unit 1b.

  The protocol processing unit 1b recognizes that communication has been established by receiving the 200 (OK) command, and sends an Ack command to the NGN 6 as a response thereto.

  By the way, when the call destination is, for example, one of the G3 facsimile apparatuses 13 and 15, communication using the application mode cannot be performed. In this case, as shown in FIG. 4, a 488 (Not Acceptable Here) command is sent from the NGN 6 to the protocol processing unit 1b after the 100 (Tring) command. Then, the protocol processing unit 1b recognizes that communication is not established, and sends a CANCEL command to the NGN 6 in order to request cancellation of the current call. In response to this, the NGN 6 cancels the call processing and sends a 200 (OK) command to the protocol processing unit 1b. Note that a 488 (Not Acceptable Here) command is one of the Warning commands. When communication is not established, a Warning command other than the 488 (Not Acceptable Here) command may be sent from the NGN 6 to the caller. The protocol processing unit 1b performs the same processing as described above when any Warning command arrives.

  The protocol processing unit 1b notifies the main control unit 1e whether or not communication has been established.

  In step Sa2, the main control unit 1e waits for the notification from the protocol processing unit 1b, and confirms whether communication has been established based on the notification. If communication is established, the main control unit 1e proceeds from step Sa2 to step Sa3.

  In step Sa3, the main control unit 1e acquires the transmission target data from the computer 4 or the Internet facsimile machine 3, and sends it to the gateway 2 as it is. The gateway 2 transmits the transmission target data to the NGN 6 toward the other party using a session using the established application mode. When the transmission target data has been transmitted, the main control unit 1e ends the process of FIG.

  When the procedure as shown in FIG. 4 is executed and communication is not established, the main control unit 1e proceeds from step Sa2 to step Sa4.

  In step Sa4, the main control unit 1e confirms whether or not a 488 (Not Acceptable Here) command has been received in the calling process in which communication could not be established. If a 488 (Not Acceptable Here) command has been received, the main controller 1e proceeds from step Sa4 to step Sa5.

  In step Sa5, the main control unit 1e confirms whether the transmission target data is image data or data that can be converted into image data. Here, the data that can be converted into image data is, for example, text data. Alternatively, when conversion to image data is allowed by the user, it may be determined that the data can be converted to image data. If the transmission target data is image data or data that can be converted into image data, the main control unit 1e proceeds from step Sa5 to step Sa6.

  In step Sa6, the main control unit 1e instructs the protocol processing unit 1b to make a call in the audio mode.

  Upon receiving this instruction, the protocol processing unit 1b starts calling processing according to the protocol defined by RFC3261.

  FIG. 5 is a sequence diagram related to the exchange of commands between the communication control device 1 and the NGN 6 in the calling process in the audio mode.

  As shown in FIG. 5, the protocol processing unit 1b first sends to the NGN 6 an INVITE command including the identification number of the call destination and information indicating “m = audio”. Then, 100 (Tring) command is returned from NGN6. Thereafter, the calling destination is called from the NGN 6 and a 180 (Ringing) command indicating that the calling is in progress is sent from the NGN 6 to the protocol processing unit 1b.

  If the call destination is, for example, one of the facsimile apparatuses 13 and 15, communication using the audio mode can be performed. Therefore, in this case, a 200 (OK) command is sent from the NGN 6 to the protocol processing unit 1b.

  The protocol processing unit 1b recognizes that communication has been established by receiving the 200 (OK) command, and sends an Ack command to the NGN 6 as a response thereto.

  In step Sa7, the main control unit 1e waits for a notification from the protocol processing unit 1b, and checks whether communication has been established based on this notification. When communication is established, the main control unit 1e proceeds from step Sa7 to step Sa8.

  In step Sa8, the main control unit 1e executes G3 FAX transmission processing for transmitting the transmission target data using G3 facsimile communication.

  FIG. 6 is a flowchart of the process of the main control unit 1e in the G3 FAX transmission process.

  In step Sb1, the main control unit 1e acquires transmission target data from the computer 4 or the Internet facsimile machine 3. The main control unit 1e temporarily stores the transmission target data acquired here in the storage unit 1d.

  In step Sb2, the main control unit 1e confirms whether the transmission target data is in a data format supported by the Internet facsimile machine 3. If the Internet facsimile apparatus 3 cannot cope with the transmission target data, the main control unit 1e proceeds from step Sb2 to step Sb3.

  In step Sb3, the main control unit 1e checks whether or not the transmission target data is image data. The main control unit 1e proceeds to step Sb4 if it is image data, and proceeds to step Sb5 if it is not image data.

  In step Sb4, the main control unit 1e instructs the data conversion unit 1c to convert the data format of the transmission target data into a data format that the Internet facsimile apparatus 3 can handle. In response to this instruction, the data conversion unit 1c converts the transmission target data so as to convert, for example, from the PDF format to the TIFF format.

  In step Sb5, the main control unit 1e instructs the data conversion unit 1c to convert the transmission target data into image data in a data format that the Internet facsimile apparatus 3 can handle. In response to this instruction, the data conversion unit 1c converts the transmission target data such that, for example, text data is converted into TIFF image data.

  When the data to be transmitted is in a data format supported by the Internet facsimile apparatus 3, when the conversion of the data format of the data to be transmitted is completed, or when the conversion of the data to be transmitted into image data is completed, the main control unit 1e Advances from any of step Sb2, step Sb4, and step Sb5 to step Sb6.

  In step Sb6, the main control unit 1e sends the transmission target data to the Internet facsimile apparatus 3 and instructs it to perform off-ramp transmission. Here, the transmission target data to be sent to the Internet facsimile machine 3 is the transmission target data acquired at step Sb1 when the process proceeds from step Sb2 to step Sb6, and the data when the process proceeds from step Sb4 to step Sb6. The data to be transmitted after the data format is converted by the conversion unit 1c, and is image data obtained by the conversion by the data conversion unit 1c when the process proceeds from step Sb5 to step Sb6. In response to the above request, the Internet facsimile machine 3 converts the given data to be transmitted into an analog facsimile transmission signal and sends it to the gateway 2. The gateway 2 is assumed to be a digitized voice system that is digitized by PCM (pulse code modulation) or the like, or an ITU-T (International Telecommunication Union-Telecommunication sector) recommendation T.30. A facsimile transmission signal is converted into facsimile transmission data using a system conforming to the standard No. 38. Then, the gateway 2 transmits facsimile transmission data to the NGN 6 toward the other party using a session using the established audio mode.

  By the way, if the 488 (Not Acceptable Here) command is not received during the calling process in the application mode, the transmission target data is neither image data nor data that can be converted into image data, If communication is not established even in the calling process in the audio mode, the main control unit 1e proceeds from steps Sa4, 5, and 7 to steps Sa9, 10, and 11, respectively. Then, in steps Sa9, 10, and 11, the main control unit 1e performs error processing according to each situation, then gives up transmission of the transmission target data and ends the processing in FIG.

  As described above, according to the communication control apparatus 1, when a 488 (Not Acceptable Here) command is sent from the NGN 6 during the call process in the application mode, the call process in the audio mode is automatically attempted. . If communication is established by this, data transmission using G3 facsimile communication is attempted. Therefore, when the application mode is selected when data is transmitted to the G3 facsimile apparatuses 13 and 15, data transmission using the G3 facsimile communication is automatically performed and the data transmission can be completed. .

  In the communication control device 1, G3 facsimile communication can also be realized by using the off-ramp transmission function of the Internet facsimile device 3. For this reason, the communication control apparatus 1 does not need to have a function for G3 facsimile communication.

(Second Embodiment)
FIG. 7 is a block diagram showing a configuration of the communication control device 21 according to the second embodiment and a configuration of a communication system including the communication control device 21. In FIG. 7, the same parts as those in FIG. 1 are denoted by the same reference numerals, and detailed description thereof is omitted.

  The communication system shown in FIG. 7 includes a gateway 2, an internet facsimile machine 3, a computer 4, a LAN 5, NGN 6, a gateway 7, a communication control device 8, an internet facsimile machine 9, a computer 10, a LAN 11, a gateway 12, a G3 facsimile machine 13, an analog. The network 14, the G3 facsimile apparatus 15, and the communication control apparatus 21 are included. That is, the communication system shown in FIG. 7 includes a communication control device 21 instead of the communication control device 1 in the communication system shown in FIG.

  The communication control device 21 is connected to the gateway 2, the Internet facsimile machine 3, and the computer 4 via the LAN 5. The communication control device 21 performs processing for the Internet facsimile apparatus 3 and the computer 4 to communicate via the NGN 6.

  The communication control device 21 includes a LAN interface unit 1a, a protocol processing unit 1b, a storage unit 1d, a data conversion unit 21a, and a main control unit 21b. These units are connected to each other via a bus 1f. That is, the communication control device 21 includes a data conversion unit 21a and a main control unit 21b instead of the data conversion unit 1c and the main control unit 1e in the communication control device 1 of the first embodiment.

  The data conversion unit 21a converts data that is not image data into image data. The data converter 21a converts the image data into facsimile transmission data.

  The main control unit 21b controls each unit of the communication control device 21 as described later.

  Next, the operation of the communication control device 21 will be described.

  When transmission target data held by the computer 4 or the Internet facsimile apparatus 3 is to be transmitted by the NGN 6 using the application mode, a request to that effect is given from the computer 4 or the Internet facsimile apparatus 3 to the communication control apparatus 21. . Upon receiving this request, in the communication control device 21, the main control unit 21b performs the processing shown in FIG. 2 in substantially the same manner as in the first embodiment. However, in the process executed by the main control unit 21b, the content of the G3 FAX transmission process in step Sa8 is different from the process executed by the main control unit 1e in the first embodiment.

  FIG. 8 is a flowchart of the process of the main control unit 21b in the G3 FAX transmission process.

  In step Sc <b> 1, the main control unit 21 b acquires transmission target data from the computer 4 or the Internet facsimile machine 3. The main control unit 21b temporarily stores the transmission target data acquired here in the storage unit 1d.

  In step Sc2, the main control unit 21b confirms whether the transmission target data is image data. If it is not image data, the main control unit 21b proceeds to Step Sc3.

  In step Sc3, the main control unit 21b instructs the data conversion unit 21a to convert the transmission target data into image data. In response to this instruction, the data conversion unit 21a converts the transmission target data so that, for example, text data is converted into TIFF image data.

  When the transmission target data is image data, or when the conversion of the transmission target data to the image data is completed, the main control unit 21b proceeds from one of Step Sc2 and Step Sc3 to Step Sc4.

  In step Sc4, the main control unit 21b instructs the data conversion unit 21a to convert the transmission target data into facsimile transmission data. In response to this instruction, the data conversion unit 21a converts the transmission target data into facsimile transmission data. Note that the facsimile transmission data includes an image information represented by transmission target data (image data) and an analog voice transmission signal that conforms to the G3 standard and is digitized by PCM or the like, or ITU-T Recommendation T. This is data obtained by digitization using a method conforming to No. 38. The transmission target data to be converted into the facsimile transmission data here is the transmission target data acquired in step Sb1 when the process proceeds from step Sc2 to step Sc4, and the data when the process proceeds from step Sc3 to step Sc4. It is image data obtained by conversion by the conversion unit 1c.

  In step Sc5, the main control unit 21b sends the facsimile transmission data obtained by the conversion process by the data conversion unit 21a to the gateway 2 via the LAN 5. Then, the gateway 2 transmits facsimile transmission data to the NGN 6 toward the other party using a session using the established audio mode.

  As described above, according to the communication control device 21, when a 488 (Not Acceptable Here) command is sent from the NGN 6 during the calling process in the application mode, the calling process in the audio mode is automatically attempted. . If communication is established by this, data transmission using G3 facsimile communication is attempted. Therefore, when the application mode is selected when data is transmitted to the G3 facsimile apparatuses 13 and 15, data transmission using the G3 facsimile communication is automatically performed and the data transmission can be completed. .

  Since the communication control device 21 has a function of generating facsimile transmission data for realizing G3 facsimile communication, the G3 facsimile communication can be realized without relying on another device as in the first embodiment. it can. That is, according to the communication control device 21, it is possible to realize transmission of transmission target data using G3 facsimile communication even in an environment where it is impossible to request another device for off-ramp transmission.

(Third embodiment)
FIG. 9 is a block diagram showing a configuration of the communication control device 31 according to the third embodiment and a configuration of a communication system including the communication control device 31. 9, the same parts as those in FIG. 1 are denoted by the same reference numerals, and detailed description thereof is omitted.

  The communication system shown in FIG. 9 includes a gateway 2, an Internet facsimile apparatus 3, a computer 4, a LAN 5, an NGN 6, a gateway 7, a communication control apparatus 8, an Internet facsimile apparatus 9, a computer 10, a LAN 11, a gateway 12, a G3 facsimile apparatus 13, and an analog. The network 14, the G3 facsimile apparatus 15, and the communication control apparatus 31 are included. That is, the communication system shown in FIG. 9 includes a communication control device 31 instead of the communication control device 1 in the communication system shown in FIG.

  The communication control device 31 is connected to the gateway 2, the Internet facsimile machine 3, and the computer 4 via the LAN 5. The communication control device 31 performs processing for the Internet facsimile apparatus 3 and the computer 4 to communicate via the NGN 6.

  The communication control device 31 includes a LAN interface unit 1a, a protocol processing unit 1b, a storage unit 1d, a data conversion unit 31a, a transmission signal generation unit 31b, and a main control unit 31c. These units are connected to each other via a bus 1f. That is, the communication control device 31 includes a data conversion unit 31a and a main control unit 31c instead of the data conversion unit 1c and the main control unit 1e in the communication control device 1 in the first embodiment, and further includes a transmission signal generation unit 31b. It is configured by adding.

  The data converter 31a converts data that is not image data into image data.

  The transmission signal generation unit 31b generates an analog facsimile transmission signal that includes image information represented by transmission target data (image data) and conforms to the G3 standard.

  The main control unit 31c controls each unit of the communication control device 31 as described later.

  Next, the operation of the communication control device 31 will be described.

  When transmission target data held by the computer 4 or the Internet facsimile apparatus 3 is to be transmitted by the NGN 6 using the application mode, a request to that effect is given from the computer 4 or the Internet facsimile apparatus 3 to the communication control apparatus 31. . Upon receiving this request, in the communication control device 31, the main control unit 31c performs the processing shown in FIG. 2 in substantially the same manner as in the first embodiment. However, in the process executed by the main control unit 31c, the content of the G3 FAX transmission process in step Sa8 is different from the process executed by the main control unit 1e in the first embodiment.

  FIG. 10 is a flowchart of the process of the main control unit 31c in the G3 FAX transmission process.

  In step Sd1, the main control unit 31c acquires transmission target data from the computer 4 or the Internet facsimile machine 3. The main control unit 31c temporarily stores the transmission target data acquired here in the storage unit 1d.

  In step Sd2, the main control unit 31c confirms whether the transmission target data is image data. If it is not image data, the main control unit 31c proceeds to step Sd3.

  In step Sd3, the main control unit 31c instructs the data conversion unit 31a to convert the transmission target data into image data. In response to this instruction, the data conversion unit 31a converts the transmission target data so that, for example, text data is converted into TIFF image data.

  When the transmission target data is image data, or when the conversion of the transmission target data to the image data is completed, the main control unit 31c proceeds from one of steps Sd2 and Sd3 to step Sd4.

  In step Sd4, the main control unit 31c instructs the transmission signal generation unit 31b to generate a facsimile transmission signal corresponding to the transmission target data. In response to this instruction, the transmission signal generation unit 31b generates a facsimile transmission signal corresponding to the transmission target data. The facsimile transmission signal is an analog facsimile transmission signal that includes image information represented by transmission target data (image data) and conforms to the G3 standard. The transmission target data used for generating the facsimile transmission signal here is the transmission target data acquired in step Sd1 when the process proceeds from step Sd2 to step Sd4, and when the process proceeds from step Sd3 to step Sd4. This is image data obtained by conversion by the data conversion unit 1c.

  The transmission signal generation unit 31 b sends the generated facsimile transmission signal to the TEL port of the gateway 2. In this case, the gateway 2 uses an assumed voice method that is digitized by PCM or the like, or a recommendation ITU-T. A facsimile transmission signal is converted into facsimile transmission data using a system conforming to the standard No. 38. Then, the gateway 2 transmits facsimile transmission data to the NGN 6 toward the other party using a session using the established audio mode.

  As described above, according to the communication control device 31, when a 488 (Not Acceptable Here) command is sent from the NGN 6 during the calling process in the application mode, the calling process in the audio mode is automatically attempted. . If communication is established by this, data transmission using G3 facsimile communication is attempted. Therefore, when the application mode is selected when data is transmitted to the G3 facsimile apparatuses 13 and 15, data transmission using the G3 facsimile communication is automatically performed and the data transmission can be completed. .

  Since the communication control device 31 has a function of generating a facsimile transmission signal for realizing the G3 facsimile communication, the G3 facsimile communication can be realized without relying on another device as in the first embodiment. it can. That is, according to the communication control device 31, it is possible to realize transmission of transmission target data using G3 facsimile communication even in an environment where it is impossible to request another device for off-ramp transmission.

  This embodiment can be variously modified as follows.

  The functions provided in the communication control devices 1, 21, 31 may be incorporated in an Internet facsimile machine or a computer.

  The communication network may be a network different from NGN.

  The G3 FAX transmission process may also be performed when any of the Warning commands other than the 488 (Not Acceptable Here) command is received.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.

  DESCRIPTION OF SYMBOLS 1, 8, 21, 31 ... Communication control device, 2, 7, 12 ... Gateway (G / W), 3, 9 ... Internet facsimile machine (I-FAX), 4, 10 ... Computer, 5, 11 ... LAN, 6 ... NGN, 13, 15 ... G3 facsimile machine (G3-FAX), 14 ... analog network, 1a ... LAN interface unit (LAN I / F unit), 1b ... protocol processing unit, 1c, 21a, 31a ... data conversion unit DESCRIPTION OF SYMBOLS 1d ... Memory | storage part, 1e, 21b, 31c ... Main-control part, 1f ... Bus, 31b ... Transmission signal generation part.

Japanese Patent No. 3247944

Claims (6)

A first transmission mode for transmitting voice data and a second transmission mode for transmitting data different from the voice data can be selectively used, and identification information for identifying a call destination and a transmission mode to be used are provided. Communication with the callee identified by the identification information is performed in the transmission mode represented by the mode information in response to receiving call information including the mode information represented from the caller communication terminal. In the communication control device connected as the communication terminal to a communication network that notifies the communication terminal whether or not it is possible,
Sending means for sending the call information including the mode information representing the second transmission mode to the communication network in response to the necessity to send the transmission target data;
In response to being notified from the communication network as a response to the call information sent by the sending means that communication is possible, the transmission target data is sent as it is using the second transmission mode. First processing means for performing a first processing for
Transmission data capable of transmitting the transmission target data in the first transmission mode in response to notification from the communication network as a response to the call information sent by the sending means that communication is impossible And a second processing means for performing a second process for transmitting using the first transmission mode. The communication control device converts an analog transmission signal given from the outside into the transmission data and sends it to the communication network, and converts the transmission target data into the transmission signal in response to an external request. The transmission target data is transmitted via the communication network in cooperation with a communication terminal device having a function of outputting to the gateway.
The second processing means performs, as the second processing, processing that requests the communication terminal apparatus to convert the transmission target data into the transmission signal and output the data to the gateway. The communication control apparatus according to 1. The communication control device causes the transmission target data to be transmitted through the communication network in cooperation with a gateway that sends the transmission data given from the outside to the communication network.
And the said communication control apparatus is further provided with the conversion means which converts the said communication object data into the said transmission data,
The second processing means controls the conversion means so as to convert the transmission target data into the transmission data, and provides the gateway with the transmission data obtained by the conversion by the conversion means. The communication control apparatus according to claim 1, wherein the communication control apparatus performs the second process. The communication control device is configured to transmit the transmission target data through the communication network in cooperation with a gateway that converts a transmission signal given from the outside into the voice data and sends the voice data to the communication network. Yes,
And the said communication control apparatus is further provided with the conversion means which converts the said transmission object data into the said transmission signal,
The second processing means controls the conversion means so as to convert the transmission target data into the transmission signal, and performs processing for giving the transmission signal obtained by the conversion by the conversion means to the gateway. The communication control apparatus according to claim 1, wherein the communication control apparatus performs the second process.   5. The communication control apparatus according to claim 1, wherein the communication network is a next-generation network that conforms to RFC (request for comments) 3261 based on IETF (internet engineering task force).   The said 2nd processing means performs a said 2nd process according to having received 488 (Not Acceptable Here) command prescribed | regulated by the said RFC3261 from the said communication network. Communication control device.

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