JP5370746B2 - Image communication device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image communication device using a T.38 communication function, wherein correct image communication is enabled even in an environment wherein a partner device different in bit transmission sequence in an IFP packet layer and a layer of T.30 commands and image information exists. <P>SOLUTION: Bit transmission/analysis sequences are preliminarily set as device setting information 320 respectively correspondingly to an IFP packet controlled by a T.38 IFP packet control part 111 and T.30 command/image information controlled by an image communication control part 109, and this device setting information 320 is referred to control the transmission/analysis sequences of the IFP packet controlled by the T.38 IFP packet control part 111 and T.30 command/image information controlled by the image communication control part 109. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to an image communication apparatus.

  2. Description of the Related Art Conventionally, as an image communication apparatus that performs image communication using a T.38 communication function, one described in Patent Document 1 is known.

  Patent Document 2 describes a configuration in which the address bit transmission order in LAN (Local Area Network) communication can be changed according to the bit definition of the other LAN.

  By the way, image communication by the T.38 communication function is performed by transmission / reception of an IFP (Internet Facsimili Protocol) packet. A field for carrying information corresponding to a G3 facsimile signal conforming to G.30 is defined. Image communication is performed by describing information (T.30 command and image information) corresponding to a G3 facsimile signal conforming to H.30.

  For example, in an image communication apparatus that establishes a session with a counterpart using SIP (Session Initiation Protocol) and performs image communication using the T.38 communication function, in addition to the IP (Internet Protocol) layer in LAN communication, IFP packet hierarchy, T. There are 30 command and image information hierarchies, and even if the bit sending order in the IP hierarchies is the same on the caller side and the callee side, the T.P. Image communication cannot be performed correctly with a partner device that does not match the bit transmission order of 30 commands or image information.

JP 2006-157120 A Japanese Patent Laid-Open No. 03-13223

  The present invention relates to an IFP packet hierarchy in an image communication apparatus with a T.38 communication function. An object of the present invention is to provide an image communication apparatus capable of performing correct image communication even in an environment in which there are opposing devices having different bit transmission orders in the hierarchy of 30 commands and image information.

  In order to achieve the above object, an image communication apparatus according to a first aspect of the present invention describes a packet control unit that transmits and receives an IFP packet by a T.38 communication function, and describes a T.30 command and image information in a field of the IFP packet. Image communication control means for controlling image communication, and the packet control unit sets order information indicating each bit transmission and analysis order corresponding to the IFP packet, the T.30 command, and the image information. Setting means; and control means for controlling the bit transmission and analysis order of the IFP packet, the T.30 command, and the image information based on the order information set in the setting means.

  An image communication apparatus according to a second aspect of the present invention comprises a call connection control means for establishing a session with a counterpart using a SIP message, a packet control section for transmitting and receiving an IFP packet by a T.38 communication function, a T.30 command, Image communication control means for controlling image communication by describing image information in the field of the IFP packet, and the call connection control means sends an invitation SIP message transmitted from the calling side to the called side during call connection. The manufacturer information of the receiving side device is described in the response SIP message transmitted from the receiving side to the calling side in response to the invitation SIP message. The packet control unit includes the manufacturer information. The bit transmission and analysis order corresponding to the IFP packet, the T.30 command, and the image information are shown corresponding to Setting means for setting introductory information, and in the transmitting side apparatus, the IFP packet, the T.30 command and the image are set based on the order information set in the setting means corresponding to the manufacturer information of the receiving side apparatus. The bit transmission and analysis order of information is controlled, and the receiving device side controls the IFP packet and the T.30 command based on the order information set in the setting means corresponding to the manufacturer information of the transmitting device. And the bit transmission and analysis order of the image information, respectively.

  According to a third aspect of the present invention, there is provided an image communication apparatus for controlling image communication by describing a T.30 command and image information in a field of the IFP packet, a packet control unit for transmitting and receiving an IFP packet by a T.38 communication function. Communication control means, and the packet control unit is a sequence information indicating each bit transmission and analysis sequence corresponding to the IFP packet, the T.30 command, and the image information corresponding to the abbreviated number used for call connection And a control means for controlling the bit transmission and analysis order of the IFP packet, the T.30 command, and the image information based on the order information set in the setting means corresponding to the abbreviated number, respectively. It comprises.

  According to a fourth aspect of the present invention, there is provided an image communication apparatus for controlling image communication by describing a T.30 command and image information in a field of the IFP packet, a packet control unit for transmitting and receiving an IFP packet by a T.38 communication function. Communication control means, wherein the packet control unit separately indicates a bit transmission order and an analysis order corresponding to the IFP packet, the T.30 command, and the image information corresponding to the originating device. A first setting means for setting the order information of the first and second bits separately indicating the bit transmission order and the analysis order corresponding to the IFP packet, the T.30 command and the image information corresponding to the receiving side device Second setting means for setting order information, and the transmitting side apparatus is configured to perform the I-based processing based on the first order information set in the first setting means. The bit transmission and analysis order of the FP packet, the T.30 command, and the image information are separately controlled, and the receiving side apparatus controls the IFP based on the second order information set by the second setting means. The bit transmission and analysis order of the packet, the T.30 command and the image information are controlled separately.

  An image communication apparatus according to a fifth aspect of the present invention includes a packet control unit that transmits and receives an IFP packet by a T.38 communication function, and an image that controls image communication by describing a T.30 command and image information in the field of the IFP packet. Communication control means, and the packet control unit sets first order information indicating first bit transmission and analysis order corresponding to the IFP packet, the T.30 command, and the image information. And second setting means for setting second order information indicating each bit transmission order corresponding to the IFP packet, the T.30 command, and the image information corresponding to the receiving side device, At the time of packet transmission, the bits of the IFP packet, the T.30 command and the image information are based on the first order information set in the first setting means. Controlling the transmission, when a packet is received, the IFP packet based on the second order information set by said second setting means, controlling bit analysis order of the T.30 commands and image information.

  An image communication apparatus according to a sixth aspect of the present invention includes a call connection control means for establishing a session with a counterpart using a SIP message, a packet control unit for transmitting and receiving an IFP packet by a T.38 communication function, a T.30 command, Image communication control means for controlling image communication by describing image information in the field of the IFP packet, and the call contact immediate control means includes an invitation SIP message transmitted from the calling side to the called side during call connection. The manufacturer information of the calling side device is described, and the manufacturer information of the called side device is described in a response SIP message transmitted from the called side to the calling side in response to the invitation SIP message. Each bit transmission and analysis order corresponding to the IFP packet, IFPT.30 command and image information corresponding to the information Setting means for setting the first order information to be shown, and second means for setting the second order information showing the order of bit transmission and analysis corresponding to the IFP packet, the T.30 command and the picture information at the time of the incoming call Setting means, and at the time of outgoing call, the IFP packet, the T.30 command, and the image information based on the first order information set in the setting means corresponding to the manufacturer information of the destination device The bit transmission order and the analysis order of the IFP packet, the T.30 command, and the image information are set based on the second order information set in the setting means at the time of arrival. Control each one.

  An image communication apparatus according to a seventh aspect of the invention includes a packet control unit that transmits and receives an IFP packet by a T.38 communication function, and an image that controls image communication by describing a T.30 command and image information in the field of the IFP packet. Communication control means, and the packet control unit, after receiving the call connection response signal by the T.38 communication function, if the calling side cannot receive the T.30 command for a predetermined time, Then, the T.30 command and image information are transmitted and analyzed by retransmitting to the partner machine and reversing the bit transmission and analysis order of the T.30 command and image information.

  An image communication apparatus according to an eighth aspect of the present invention includes a packet control unit that transmits and receives an IFP packet by a T.38 communication function, and an image that controls image communication by describing a T.30 command and image information in the field of the IFP packet. Communication control means, the packet control unit, after successfully completing the call connection by the T.38 communication function, if the call connection response command cannot be received for a certain time on the calling side, Re-send to the other machine, reverse the bit sending and analysis order of the IFP packet, and send and analyze the IFP packet.

  An image communication apparatus according to a ninth aspect of the present invention includes a packet control unit that transmits and receives an IFP packet by a T.38 communication function, and an image that controls image communication by describing a T.30 command and image information in the field of the IFP packet. Communication control means, and the packet control unit disconnects the call if the T.30 command cannot be received for a certain period of time after the call connection by the T.38 communication function is completed normally. Then, after waiting for a re-incoming call from the partner machine, the T.30 command and the image information are analyzed by reversing the bit transmission order and the analysis order of the T.30 command and the image information.

  According to the first aspect of the present invention, the IFP packet hierarchy, T. Correct image communication is possible even in an environment in which there are opposing devices having different bit transmission orders in the hierarchy of 30 commands and image information.

  According to the invention of claim 2, since it is possible to know the sending order of the IFP packet, T.30 command and image information of the partner machine from the model code described in the SIP message used for call connection, the hierarchy of the IFP packet, T.A. Correct image communication is possible even in an environment in which there are opposing devices having different bit transmission orders in the hierarchy of 30 commands and image information.

  According to the invention of claim 3, since the sending order of the IFP packet, T.30 command, and image information of the other party can be known from the abbreviated number used for call connection, Correct image communication is possible even in an environment in which there are opposing devices having different bit transmission orders in the hierarchy of 30 commands and image information.

  According to the fourth aspect of the present invention, the transmission order and analysis order of the IFP packet, T.30 command, and image information are set separately for the originating device and the terminating device, respectively, so that the IFP packet hierarchy, T.A. Correct image communication is possible even in an environment in which there are opposing devices having different bit transmission orders in the hierarchy of 30 commands and image information.

  According to the invention of claim 5, the sending and analyzing order of the IFP packet, T.30 command and image information at the time of outgoing call is set corresponding to the calling side device, and the IFP packet, T corresponding to the called side device is set. .30 command and image information transmission order and analysis order are set separately, so that the I.P. Correct image communication is possible even in an environment in which there are opposing devices having different bit transmission orders in the hierarchy of 30 commands and image information.

  According to the sixth aspect of the present invention, the sending order of the IFP packet, T.30 command and image information of the other device is known from the model code described in the SIP message used for call connection, and is set in the own device when an incoming call is received. By using the IFP packet, the T.30 command described in the IFP packet, and the transmission and analysis order of the image information, the IFP packet hierarchy, T.30 Correct image communication is possible even in an environment in which there are opposing devices having different bit transmission orders in the hierarchy of 30 commands and image information.

  According to the seventh aspect of the present invention, it is possible to perform correct image communication even when the transmitting side device does not know the sending order of the IFP packet of the receiving side device, the T.30 command described in the IFP packet, and the image information.

  According to the invention of claim 8, correct image communication is possible even when the transmitting side device does not know the transmission order of the IFP packet of the receiving side device, the T.30 command described in the IFP packet and the image information.

  According to the ninth aspect of the present invention, the image receiving side apparatus can perform correct image communication even when the sending side apparatus does not know the transmission order of the IFP packet, the T.30 command described in the IFP packet, and the image information.

FIG. 1 is a block diagram showing a schematic configuration of an image communication apparatus according to the present invention. FIG. 2 shows the IFP packet hierarchy, T.P. It is a figure explaining the bit transmission order and analysis order for enabling correct image communication in the environment where the opposite machine from which a bit transmission order differs in the hierarchy of 30 commands and image information exists, respectively. FIG. 3 is a flowchart illustrating image communication control according to the first embodiment of the present invention. FIG. 4 is a flowchart illustrating image communication control according to the second embodiment of the present invention. FIG. 5 is a flowchart illustrating image communication control according to the third embodiment of the present invention. FIG. 6 is a flowchart illustrating image communication control according to the fourth embodiment of the present invention. FIG. 7 is a flowchart illustrating image communication control according to the fifth embodiment of the present invention. FIG. 8 is a flowchart illustrating image communication control according to the sixth embodiment of the present invention. FIG. 9 is a flowchart illustrating image communication control according to the seventh embodiment of the present invention. FIG. 10 is a flowchart illustrating image communication control according to the eighth embodiment of the present invention. FIG. 11 is a flowchart illustrating image communication control according to the ninth embodiment of the present invention.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a block diagram showing a schematic configuration of an image communication apparatus according to the present invention. The image communication apparatus 100 includes a main control unit 101, an image storage unit 102, an image reading unit 103, a printing unit 104, an operation unit 105, a storage unit 106, an image processing unit 107, a call connection control unit 108, and an image communication control unit 109. Is connected to the bus 110, the call connection control unit 108 is connected to the image communication control unit 109 via the TCP / UDP / IP control unit 112, and the image communication control unit 109 is connected to the network interface unit 113. It is configured to be connected to the TCP / UDP / IP control unit 112 via the 38 IFP packet control unit 111.

  Here, the main control unit 101 performs overall control processing of the image communication apparatus 100.

  The image storage unit 102 stores the image read from the image reading unit 103 or the received image.

  The image reading unit 103 reads an original image with a predetermined resolution, and the printing unit 104 prints the image with a predetermined resolution.

  The operation unit 105 includes various operation keys that operate the image communication apparatus 100 and a display unit that displays various information.

  The storage unit 106 includes a RAM (Random Access Memory), and stores system data, communication information, and the like that control the operation of the image communication apparatus 100.

  The image processing unit 107 performs processing such as encoding, decoding, enlargement, and reduction for image data.

  The call connection control unit 108 controls SIP call connection. Specific examples of the control function provided by the SIP include registration of location information, session establishment / disconnection, capability negotiation, presence information exchange, and the like.

  The image communication control unit 109 realizes image communication. ITU (International Telecommunication Union) -T. 30 protocols are controlled.

  T.A. 38 IFP packet control unit 111 is an ITU-T. 38 controls the protocol of the IFP packet layer in conformity with 38.

  The TCP / UDP / IP control unit 112 performs protocol control of the Internet transport / network layer. The network interface unit 113 is connected to the IP network and performs communication control below the data link layer.

  FIG. 2 shows the IFP packet hierarchy, T.P. It is a figure explaining the bit transmission order and analysis order for enabling correct image communication in the environment where the opposite machine from which a bit transmission order differs in the hierarchy of 30 commands and image information exists, respectively.

  T.A. The structure of the packet used in the image communication according to 38 is as shown in FIG.

  T.A. In the image communication according to T.38, the field defined in the IFP packet includes T.37. 30 in accordance with T.30. 30 commands and image information are described. 38, as shown in FIG. 2A, the IP address 201, the IFP packet 202, the T.38, and the like. There is a hierarchy of 30 commands or image information 203.

  Here, if the packet receiving side does not analyze the bits in the bit order transmitted by the transmitter side in all layers, the received T.P. 30 commands cannot be correctly interpreted, and received image information cannot be correctly decoded.

  For example, T.W. In order to correctly analyze the command of the transmitter that sends the 30 command 203 by LSB First (send from the lower bit) and sends the IFP packet 202 and IP address 201 of the upper layer by MSB First (send from the upper bit), As shown in FIG. 2B, the IFP packet and the IP address are analyzed (interpreted from the upper bits) by MSB First. Only 30 commands need to be analyzed (interpreted from the lower bits) with LSB First.

  The IP address and the like are transmitted by MSB First. The existence of a transmitter that sends LSB First in LSB First cannot be denied. In this case, the IP address is MSB First, and the IFP packet and T.30 command are sent. The 30 commands need to be analyzed with LSB First.

  Therefore, the IFP packet hierarchy, T.P. In order to enable image communication in which correct image communication is possible even in an environment where there is a counterpart device having a different bit transmission order in each of the 30 command and image information layers, the IFP packet layer, It is necessary to be able to set the bit transmission / analysis order for 30 commands and the hierarchy of image information.

  FIG. 3 is a flowchart for explaining image communication control (FAX communication control) according to the first embodiment of the present invention.

  In the image communication control according to the first embodiment, the IFP packet and the T.P. Each bit transmission / analysis order corresponding to the 30 command / image information is preset as the device setting information 320. With reference to the device setting information 320, the IFP packet and the T.30 information are set. 30 commands / image information transmission / analysis order is controlled.

  In FIG. 3, a call connection is made using a SIP message. That is, at the time of call connection, the calling device sends “INVITE”, which is an invitation SIP message, to the called device (step 301).

  Upon receiving “INVITE” from the calling side device (step 311), the receiving side device transmits “200 OK” which is a response SIP message to “INVITE” to the calling side device (step 312).

  Upon receiving “200 OK” from the receiving side device, the calling side device establishes a call connection with the receiving side device (step 302). It is determined whether or not image communication conforming to 38 is possible (step 303). Here, the T.P. If it is determined that image communication conforming to H.38 is possible (YES in step 303), the bit transmission / analysis order is determined with reference to the preset device setting information 320 (step 304).

  In the configuration shown in FIG. 3, as the device setting information 320, the IFP packet is MSB First (transmitted / analyzed from upper bits), T.P. Since the 30 command / image information is set to LSB First (transmission / analysis from lower bits), in step 304, it is determined that the IFP packet is transmitted from the upper bits and analyzed from the upper bits. The 30 command / image information is determined to be transmitted from the lower bit and analyzed from the lower bit.

  Specifically, as indicated by 331 to 334 in FIG. 3, “CED: 0300000504” 331, “Preamble: 03000005056” 332, T. “DIS: 0300001cc002800011“ ff138000 eaac4... ”40” 333 except for the command part “ff138000 eaac4...” 334 is determined to be transmitted from the upper bits and analyzed from the upper bits. 30 command part “ff138000eaac4...” 334 is determined to be transmitted from the lower bits and analyzed from the lower bits.

  In addition, when “200 OK” is transmitted to the receiving side device, next, T.P. It is determined whether or not image communication conforming to 38 is possible (step 313). Here, the T.P. If it is determined that image communication based on the standard 38 is possible (YES in step 313), the bit transmission / analysis order is determined with reference to the device setting information 320 (step 314).

  Again, as the device setting information 320, the IFP packet is MSB First (transmitted / analyzed from upper bits), T.P. Since 30 command / image information is set to LSB First (send / analyze from lower bits), in step 314 of the receiving side device, it is determined that the IFP packet is sent from the upper bits and analyzed from the upper bits. T. The 30 command / image information is determined to be transmitted from the lower bit and analyzed from the lower bit.

  As a result, the sending device and the receiving device have the same bit transmission order and analysis order for all layers.

  Thereafter, the transmitting side device transmits the T.P. T.38 port and the receiving side device. The FAX communication according to 38 is performed (step 305).

  Similarly, in the receiving side device, T.P. T.38 port and the transmitting side device. The FAX communication according to 38 is executed (step 315).

  When the call is disconnected at the calling side device due to the end of FAX communication or the like, a BYE (session cut request) is transmitted from the calling side device to the called side device to disconnect the SIP call (step 306). finish.

  Also, when receiving the BYE (session disconnection request) from the originating device, the terminating device disconnects the SIP call (step 316) and ends this process.

  In step 303, T.P. If it is determined that the image communication conforming to No. 38 is impossible (NO in Step 303), the process proceeds to Step 306, where the SIP call is disconnected. In step 313, T.P. If it is determined that the image communication conforming to No. 38 is impossible (NO in Step 313), the process proceeds to Step 316 to disconnect the SIP call.

  FIG. 4 is a flowchart illustrating image communication control (FAX communication control) according to the second embodiment of the present invention.

  In the image communication control according to the second embodiment, the manufacturer information of each of the calling side device and the called side device is set in the SIP message used for call connection, and the IFP packet and the T.P. Each bit transmission / analysis order of 30 commands / image information is set in advance as manufacturer-specific device setting information 420. With reference to the manufacturer-specific device setting information 420, an IFP packet and a T . 30 commands / image information transmission / analysis order is controlled to match each other.

  The manufacturer information for the SIP message is set by describing the manufacturer information in the SDP (Session Description Protocol) or T.38 VendorInfo of the SIP message.

  In the second embodiment shown in FIG. 4, when a call is connected, the calling device sends out an invitation SIP message “INVITE” (step 401). At this time, the manufacturer information (company code) of the company (sender side device) is described in “T.38 VendorInfo” of “INVITE”.

  When the receiving side device receives “INVITE” from the calling side device (step 411), it analyzes “T.38 VendorInfo” of “INVITE” and sends it from the company code described in “T.38 VendorInfo”. Specify the device manufacturer (partner manufacturer).

  Then, the receiving side device transmits a response SIP message “200 OK” to “INVITE” to the calling side device (step 412). At this time, the manufacturer information (company code) of the company (incoming device) is described in “T.38 VendorInfo” of “200 OK”.

  Upon receiving “200 OK” from the receiving side device, the calling side device establishes a call connection with the receiving side device (step 402). At this time, the transmission side device analyzes “T.38 VendorInfo” of “200 OK” and specifies the manufacturer of the reception side device from the company code described in “T.38 VendorInfo”.

  Next, in the transmission side device, T.P. It is determined whether or not image communication conforming to 38 is possible (step 403). Here, the T.P. If it is determined that image communication conforming to H.38 is possible (YES in step 403), the bit transmission / analysis order is referred to by referring to the manufacturer-specific device setting information 420 based on the manufacturer of the receiving device specified in step 402. Is determined (step 404).

  In the configuration shown in FIG. 4, as manufacturer-specific device setting information 420, company A (in-house code 91) has IFP packet bit transmission / analysis order as MSB First (transmission / analysis from upper bits), T.A. MSB First (send / analyze from upper bit) is set as the bit transmission / analysis order of 30 commands / image information. Similarly, the BFP (own code 92) has a bit transmission / analysis order of IFP packets. MSB First (transmit / analyze from upper bits), T. 30 command / image information bit transmission / analysis order as LSB First (transmission / analysis from lower bits), Company C (own code 93) has ISB packet bit transmission / analysis order as LSB First (from lower bits) Delivery / analysis), T.M. LSB First (send / analyze from lower bit) as the bit transmission / analysis order of 30 commands / image information, and D company (own code 94) has MSB First (from the upper bit as the bit transmission / analysis order of IFP packet). Delivery / analysis), T.M. MSB First (transmission / analysis from upper bits) is set as the bit transmission / analysis order of 30 commands / image information.

  If the manufacturer is indefinite / unknown, the bit transmission / analysis order of the IFP packet is MSB First (transmission / analysis from upper bits), T.P. MSB First (transmission / analysis from upper bits) is set as the bit transmission / analysis order of 30 commands / image information.

  Here, for example, if the company code described in “T.38 VendorInfo” of “200 OK” is “91” indicating company A, in step 404, the manufacturer-specific device setting information 420 is referred to. As the bit transmission / analysis order of the IFP packet, MSB First (transmission / analysis from upper bits), T.P. As a bit transmission / analysis order of 30 commands / image information, MSB First (transmission / analysis from upper bits) is determined.

  In addition, when “200 OK” is transmitted to the receiving side device, next, T.P. It is determined whether or not image communication based on the standard 38 is possible (step 413). Here, the T.P. If it is determined that image communication conforming to H.38 is possible (YES in step 413), the bit transmission / analysis order is determined with reference to the manufacturer-specific device setting information 420 (step 414).

  Here, if the company code described in “T.38 VendorInfo” of “INVITE” is “92” indicating B company, in step 414, the bit of the IFP packet is referred to by referring to the manufacturer-specific device setting information 420. As the transmission / analysis order, MSB First (transmission / analysis from upper bits), T.P. As the bit transmission / analysis order of 30 commands / image information, LSB First (transmission / analysis from lower bits) is determined.

  As a result, the sending device and the receiving device have the same bit transmission order and analysis order for all layers.

  Thereafter, the transmitting side device transmits the T.P. T.38 port and the receiving side device. The FAX communication according to 38 is performed (step 405).

  Similarly, in the receiving side device, T.P. T.38 port and the transmitting side device. The FAX communication according to 38 is performed (step 415).

  When the call is disconnected at the originating device due to the end of FAX communication or the like, a BYE (session disconnect request) is transmitted from the originating device to the terminating device, and the SIP call is disconnected (step 406). finish.

  Further, when receiving the BYE (session disconnection request) from the calling side device, the receiving side device disconnects the SIP call (step 416) and ends this processing.

  In step 403, T.P. If it is determined that the image communication conforming to No. 38 is impossible (NO in Step 403), the process proceeds to Step 406 to disconnect the SIP call. In step 413, T.P. If it is determined that the image communication conforming to No. 38 is impossible (NO in Step 413), the process proceeds to Step 416, and the SIP call is disconnected.

  FIG. 5 is a flowchart for explaining image communication control (FAX communication control) according to the third embodiment of the present invention.

  In the image communication control according to the third embodiment, the IFP packet and the T.30 packet are associated with the abbreviated number (abbreviated dial) used for call connection. The bit transmission / analysis order of each of the 30 commands / image information is stored in advance as device setting information 520 for each abbreviated number, and the IFP packet is transmitted between the transmitting side device and the receiving side device with reference to the abbreviated number device setting information 520. And T. 30 commands / image information transmission / analysis order is controlled to match each other.

  In the third embodiment shown in FIG. 5, the bit transmission / analysis order of the IFP packet is MSB First (transmission / analysis from the upper bits) corresponding to the shortened number “001” in the device setting information 520 for each shortened number. T.A. The bit transmission / analysis order of 30 commands / image information is set to MSB First (transmission / analysis from upper bits). Similarly, the bit transmission / analysis order of the IFP packet corresponds to the abbreviated number “002”. MSB First (transmit / analyze from upper bits), T. The bit transmission / analysis order of 30 commands / image information corresponds to LSB First (transmission / analysis from lower bits) and the abbreviated number “003”, and the bit transmission / analysis order of IFP packets is LSB First (from lower bits). Delivery / analysis), T.M. The bit transmission / analysis order of 30 commands / image information corresponds to LSB First (transmission / analysis from lower bits) and the abbreviated number “004”, and the bit transmission / analysis order of IFP packets is MSB First (from upper bits). Delivery / analysis), T.M. The bit transmission / analysis order of 30 commands / image information corresponds to MSB First (transmission / analysis from the upper bits) and the abbreviated number “005”, and the bit transmission / analysis order of the IFP packet is MSB First (from the upper bits). Delivery / analysis), T.M. The bit transmission / analysis order of 30 commands / image information is set to MSB First (transmission / analysis from upper bits).

  That is, in the device setting information 520 for each abbreviated number, the IFP packet and the T.P. The bit transmission / analysis order of 30 commands / image information is preset.

  Referring to FIG. 5, when a call is made using an abbreviated number, the calling side device refers to the abbreviated number-specific device setting information 520 so that the bit sending order and the analysis order are the same for the receiving side and all layers. The sending / analysis order is determined (step 501).

  Subsequently, the calling device sends an invitation SIP message “INVITE” to the called device (step 502).

  Upon receiving “INVITE” from the originating device (step 511), the terminating device transmits a response SIP message “200 OK” to “INVITE” to the originating device (step 512).

  Upon receiving “200 OK” from the receiving side device, the calling side device establishes a call connection with the receiving side device (step 503).

  Next, in the transmission side device, T.P. It is determined whether or not image communication based on the standard 38 is possible (step 504). Here, the T.P. If it is determined that the image communication conforming to the standard 38 is possible (YES in step 504), the transmission side apparatus determines that the T.38 has been set. T.38 port and the receiving side device. The FAX communication according to 38 is performed (step 505).

  In addition, when “200 OK” is transmitted to the receiving side device, next, T.P. It is determined whether or not image communication based on the standard 38 is possible (step 513). Here, the T.P. If it is determined that the image communication conforming to the standard 38 is possible (YES in step 513), the receiving side apparatus also performs the T.40. T.38 port and the transmitting side device. The FAX communication according to 38 is performed (step 514).

  T. between the originating device and the terminating device. In the FAX communication conforming to 38, first, the CED signal is transmitted from the receiving side device to the calling side device, and then the NSF / CSI / DIS signal is transmitted from the receiving side device to the calling side device. A TSI / DCS signal is transmitted from the device to the receiving device, a CFR signal is transmitted from the receiving device to the calling device, and then image information is transmitted from the calling device to the receiving device, and then the calling device. Is transmitted by transmitting a PPS.EOP signal from the receiving device to the calling device, transmitting an MCF signal from the calling device to the receiving device, and transmitting a DCN signal from the calling device to the receiving device.

  When the call is disconnected at the originating device due to the end of FAX communication or the like, a BYE (session disconnect request) is transmitted from the originating device to the terminating device, and the SIP call is disconnected (step 506). finish.

  Also, when receiving the BYE (session disconnection request) from the calling side device, the receiving side device disconnects the SIP call (step 515) and ends this processing.

  In step 504, T.P. If it is determined that the image communication conforming to No. 38 is impossible (NO in Step 504), the process proceeds to Step 506, where the SIP call is disconnected. In step 413, T.P. If it is determined that the image communication conforming to No. 38 is impossible (NO in Step 513), the process proceeds to Step 515 to disconnect the SIP call.

  FIG. 6 is a flowchart illustrating image communication control (FAX communication control) according to the fourth embodiment of the present invention.

  In the image communication control according to the fourth embodiment, the IFP packet and the T.P. The transmission side device setting information 620 in which the bit transmission order and the bit analysis order of the 30 command / image information are separately set, and the IFP packet and T.30 corresponding to the called side device. Receiving device setting information 630 in which the bit transmission order and the bit analysis order of the 30 command / image information are separately set, and the calling device refers to the calling device setting information 620 and refers to the IFP packet and the T.30 command / image information. 30, the sending side device controls the sending order and the analysis order of the image information, and the called side device refers to the called side device setting information 630 and transmits the IFP packet and the T.30 command / image information. By controlling the transmission order and analysis order of the 30 command / image information, respectively, the IFP packet and the T.30 packet are transmitted between the transmission side device and the reception side device. 30 commands / image information transmission / analysis order is matched.

  In the fourth embodiment shown in FIG. 6, at the time of call connection, an invitation SIP message “INVITE” is sent from the originating device to the terminating device (step 601).

  Upon receiving “INVITE” from the originating device (step 611), the terminating device transmits a response SIP message “200 OK” to “INVITE” to the originating device (step 612).

  Upon receiving “200 OK” from the receiving side device, the calling side device establishes a call connection with the receiving side device (step 602). It is determined whether or not image communication based on the standard 38 is possible (step 603). Here, the T.P. If it is determined that image communication conforming to H.38 is possible (YES in step 603), the bit transmission / analysis order is determined with reference to the transmission side apparatus setting information 620 (step 604).

  At this time, the transmission side device setting information 620 includes the IFP packet and the T.P. Since the bit transmission order and the bit analysis order are set separately corresponding to the 30 command / image information, Corresponding to 30 commands / image information, the bit transmission order and the bit analysis order are determined separately.

  In other words, in the configuration shown in FIG. 6, as the transmission side device setting information 620, the IFP packet has the bit transmission order set to MSB First (transmitted from the upper bits) and the bit analysis order set to MSB First (analyzed from the upper bits). T. 30 command / image information is set so that the bit transmission order is set to LSB First (transmission from lower bits) and the bit analysis order is set to MSB First (analysis from upper bits). Is determined to be analyzed from the upper bits. The 30 command / image information is determined to be transmitted from the lower bits and analyzed from the upper bits.

  In addition, when “200 OK” is transmitted to the receiving side device, next, T.P. It is determined whether or not image communication conforming to 38 is possible (step 613). Here, the T.P. If it is determined that image communication conforming to H.38 is possible (YES in step 613), the bit transmission / analysis order is determined with reference to the receiving device setting information 630 (step 614).

  Here again, the receiving device setting information 630 includes the IFP packet and the T.P. Since the bit transmission order and the bit analysis order are set separately corresponding to the 30 command / image information, Corresponding to 30 commands / image information, the bit transmission order and the bit analysis order are determined separately.

  That is, in the configuration shown in FIG. 6, as the receiving side device setting information 630, the IFP packet has the bit transmission order set to MSB First (transmitted from the upper bits) and the bit analysis order set to MSB First (analyzed from the upper bits). T. 30 command / image information is set so that the bit transmission order is set to MSB First (analyze from the upper bit) and the bit analysis order is set to LSB First (transmit from the lower bit). In step 614, the upper bit is set for the IFP packet. Is determined to be analyzed from the upper bits. The 30 command / image information is determined to be transmitted from the upper bit and analyzed from the lower bit.

  As a result, the sending device and the receiving device have the same bit transmission order and analysis order for all layers.

  Thereafter, the transmitting side device transmits the T.P. T.38 port and the receiving side device. The FAX communication according to 38 is performed (step 605).

  Similarly, in the receiving side device, T.P. T.38 port and the transmitting side device. The FAX communication according to 38 is performed (step 615).

  T. between the originating device and the terminating device. In the FAX communication conforming to 38, first, the CED signal is transmitted from the receiving side device to the calling side device, and then the NSF / CSI / DIS signal is transmitted from the receiving side device to the calling side device. A TSI / DCS signal is transmitted from the device to the receiving device, a CFR signal is transmitted from the receiving device to the calling device, and then image information is transmitted from the calling device to the receiving device, and then the calling device. Is transmitted by transmitting a PPS.EOP signal from the receiving device to the calling device, transmitting an MCF signal from the calling device to the receiving device, and transmitting a DCN signal from the calling device to the receiving device.

  Here, in the transmission side apparatus, the TSI / DCS signal, the image information, the PPS.EOP signal, and the DCN signal are transmitted from the upper bits in the IFP packet hierarchy. In the hierarchy of 30 commands (image information), it is transmitted from the lower bits.

  In addition, the CED signal, NSF / CSI / DIS signal, CRF signal, and MCF signal received from the receiving side device are analyzed from the upper bit in the IFP packet hierarchy, and the T.P. The hierarchy of 30 commands is also analyzed from the upper bits.

  In the receiving side device, the CED signal, the NSF / CSI / DIS signal, the CRF signal, and the MCF signal are transmitted from the upper bit in the IFP packet hierarchy. The hierarchy of 30 commands is also transmitted from the upper bits.

  In addition, the TSI / DCS signal, image information, PPS.EOP signal, and DCN signal received from the transmission side device are analyzed from the upper bits in the IFP packet hierarchy. In the hierarchy of 30 commands (image information), analysis is performed from the lower bits.

  When the call is disconnected at the originating device due to the end of FAX communication or the like, a BYE (session disconnect request) is transmitted from the originating device to the terminating device, and the SIP call is disconnected (step 606). finish.

  Further, when receiving the BYE (session disconnection request) from the calling side device, the receiving side device disconnects the SIP call (step 616) and ends this processing.

  In step 603, T.P. If it is determined that the image communication conforming to No. 38 is impossible (NO in Step 603), the process proceeds to Step 606, where the SIP call is disconnected. In step 613, T.P. If it is determined that the image communication conforming to No. 38 is impossible (NO in Step 613), the process proceeds to Step 616 to disconnect the SIP call.

  FIG. 7 is a flowchart for explaining image communication control (FAX communication control) according to the fifth embodiment of the present invention.

  In the image communication control according to the fifth embodiment, the IFP packet and the T.P. The transmission side device setting information 720 in which the bit transmission order and the bit analysis order at the time of transmission of the 30 command / image information are set, and the IFP packet and T.30 corresponding to the called side device. 30 command / image information bit transmission order and bit analysis order are set separately, and the transmission side apparatus refers to the transmission side apparatus setting information 720. 30 command / image information transmission and analysis order are controlled respectively, and the called-side device refers to the called-side device setting information 730 and the IFP packet and T.30 information. By separately controlling the transmission order and analysis order of the 30 command / image information, the sending side device and the receiving side device can control the IFP packet and the T.30 command / image information. 30 commands / image information transmission / analysis order is matched.

  In the fifth embodiment shown in FIG. 7, at the time of call connection, an invitation SIP message “INVITE” is sent from the originating device to the terminating device (step 701).

  Upon receiving “INVITE” from the originating device (step 711), the terminating device transmits a response SIP message “200 OK” to “INVITE” to the originating device (step 712).

  Upon receiving “200 OK” from the receiving side device, the calling side device establishes a call connection with the receiving side device (step 702). It is determined whether or not image communication based on the standard 38 is possible (step 703). Here, the T.P. If it is determined that image communication conforming to H.38 is possible (YES in step 703), the bit transmission / analysis order is determined with reference to the transmission side apparatus setting information 720 (step 704).

  At this time, the transmission side device setting information 720 includes the IFP packet and the T.P. The bit transmission order and bit analysis order at the time of transmission are set corresponding to the 30 command / image information. 30 command / image information bit transmission order and bit analysis order are determined.

  That is, in the configuration shown in FIG. 7, as the transmission side device setting information 720, the IFP packet at the time of transmission is MSB First (transmission / analysis from the upper bit) and T. Since the bit transmission / analysis order of the 30 command / image information is set to LSB First (transmission / analysis from lower bits), in step 704, it is determined that the IFP packet is transmitted / analysis from the upper bits, and T . The 30 command / image information is determined to be transmitted / analyzed from the lower bits.

  In the configuration shown in FIG. 7, as the device default in the transmission side device setting information 720, the IFP packet has a bit transmission / analysis order of MSB First (transmission / analysis from upper bits), T.P. In the 30 command / image information, the bit transmission / analysis order is set to MSB First (transmission / analysis from upper bits). This setting is a setting used by the transmission side device when receiving.

  In addition, when “200 OK” is transmitted to the receiving side device, next, T.P. It is determined whether or not image communication conforming to 38 is possible (step 713). Here, the T.P. If it is determined that image communication conforming to H.38 is possible (YES in step 713), the bit transmission / analysis order is determined with reference to the receiving device setting information 730 (step 714).

  Here, the receiving device setting information 730 includes an IFP packet and a T.P. Since the bit transmission order and the bit analysis order are set separately corresponding to the 30 command / image information, Corresponding to 30 commands / image information, the bit transmission order and the bit analysis order are determined separately.

  In other words, in the configuration shown in FIG. 7, as the receiving side device setting information 7630, the IFP packet has the bit transmission order set to MSB First (transmitted from the upper bits) and the bit analysis order set to MSB First (analyzed from the upper bits). T. The 30 command / image information is set so that the bit transmission order is set to MSB First (analysis from the upper bit) and the bit analysis order is set to LSB First (transmission from the lower bit). Is determined to be analyzed from the upper bits. The 30 command / image information is determined to be transmitted from the upper bit and analyzed from the lower bit.

  As a result, the sending device and the receiving device have the same bit transmission order and analysis order for all layers.

  Thereafter, the transmitting side device transmits the T.P. T.38 port and the receiving side device. The FAX communication according to 38 is performed (step 705).

  Similarly, in the receiving side device, T.P. T.38 port and the transmitting side device. The FAX communication according to 38 is performed (step 715).

  T. between the originating device and the terminating device. In the FAX communication conforming to 38, first, the CED signal is transmitted from the receiving side device to the calling side device, and then the NSF / CSI / DIS signal is transmitted from the receiving side device to the calling side device. A TSI / DCS signal is transmitted from the device to the receiving device, a CFR signal is transmitted from the receiving device to the calling device, and then image information is transmitted from the calling device to the receiving device, and then the calling device. Is transmitted by transmitting a PPS.EOP signal from the receiving device to the calling device, transmitting an MCF signal from the calling device to the receiving device, and transmitting a DCN signal from the calling device to the receiving device.

  Here, in the transmission side apparatus, the TSI / DCS signal, the image information, the PPS.EOP signal, and the DCN signal are transmitted from the upper bits in the IFP packet hierarchy. In the hierarchy of 30 commands (image information), it is transmitted from the lower bits.

  In addition, the CED signal, NSF / CSI / DIS signal, CRF signal, and MCF signal received from the receiving side device are analyzed from the upper bit in the IFP packet hierarchy, and the T.P. The hierarchy of 30 commands is also analyzed from the upper bits.

  In the receiving side device, the CED signal, the NSF / CSI / DIS signal, the CRF signal, and the MCF signal are transmitted from the upper bit in the IFP packet hierarchy. The hierarchy of 30 commands is also transmitted from the upper bits.

  In addition, the TSI / DCS signal, image information, PPS.EOP signal, and DCN signal received from the transmission side device are analyzed from the upper bits in the IFP packet hierarchy. In the hierarchy of 30 commands (image information), analysis is performed from the lower bits.

  When the call is disconnected at the originating device due to the end of FAX communication or the like, a BYE (session disconnect request) is transmitted from the originating device to the terminating device, and the SIP call is disconnected (step 706). finish.

  Also, when receiving the BYE (session disconnection request) from the calling side device, the receiving side device disconnects the SIP call (step 716) and ends this processing.

  In step 703, the T.P. If it is determined that image communication conforming to H.38 is not possible (NO in step 703), the process proceeds to step 706 to disconnect the SIP call. In step 713, T.P. If it is determined that the image communication conforming to No. 38 is impossible (NO in Step 713), the process proceeds to Step 716 to disconnect the SIP call.

  FIG. 8 is a flowchart for explaining image communication control (FAX communication control) according to the sixth embodiment of the present invention.

  In the image communication control according to the sixth embodiment, similar to the second embodiment shown in FIG. 4, the manufacturer information of each of the calling side device and the called side device is set in the SIP message used for call connection, and the manufacturer information Corresponding to the IFP packet and T.30. The bit transmission / analysis order of each of the 30 commands / image information is preset as manufacturer-specific device setting information 420. When the transmission is performed, the T.30 is used for a manufacturer with the reverse of the bit transmission order. 30 commands / image information is transmitted / analyzed in the order in which the transmission / analysis order of its own apparatus is reversed. 30 commands / image information is transmitted / analyzed.

  The manufacturer information for the SIP message is set by describing the manufacturer information in the SDP (Session Description Protocol) or T.38 VendorInfo of the SIP message.

  In the sixth embodiment shown in FIG. 8, at the time of call connection, the calling device sends out an invitation SIP message “INVITE” (step 801). At this time, the manufacturer information (company code) of the company (sender side device) is described in “T.38 VendorInfo” of “INVITE”.

  When the receiving side device receives “INVITE” from the calling side device (step 811), it analyzes “T.38 VendorInfo” of “INVITE” and sends it from the company code described in “T.38 VendorInfo”. Specify the device manufacturer (partner manufacturer).

  Then, the receiving side device transmits a response SIP message “200 OK” to “INVITE” to the calling side device (step 812). At this time, the manufacturer information (company code) of the company (incoming device) is described in “T.38 VendorInfo” of “200 OK”.

  Upon receiving “200 OK” from the receiving side device, the calling side device establishes a call connection with the receiving side device (step 402). At this time, the transmission side apparatus analyzes “T.38 VendorInfo” of “200 OK” and specifies the manufacturer (partner maker) of the reception side apparatus from the company code described in “T.38 VendorInfo”.

  Next, in the transmission side device, T.P. It is determined whether or not image communication based on the standard 38 is possible (step 803). Here, the T.P. If it is determined that image communication conforming to H.38 is possible (YES in step 803), when making a call, referring to the manufacturer-specific device setting information 820 based on the manufacturer of the called device specified in step 802, the bit The sending / analysis order is determined (step 804).

  In the configuration shown in FIG. 8, as manufacturer-specific device setting information 420, company A (in-house code 91) has IFP packet bit transmission / analysis order as MSB First (transmission / analysis from upper bits), T.A. MSB First (send / analyze from upper bit) is set as the bit transmission / analysis order of 30 commands / image information. Similarly, the BFP (own code 92) has a bit transmission / analysis order of IFP packets. MSB First (transmit / analyze from upper bits), T. 30 command / image information bit transmission / analysis order as LSB First (transmission / analysis from lower bits), Company C (own code 93) has ISB packet bit transmission / analysis order as LSB First (from lower bits) Delivery / analysis), T.M. LSB First (send / analyze from lower bit) as the bit transmission / analysis order of 30 commands / image information, and D company (own code 94) has MSB First (from the upper bit as the bit transmission / analysis order of IFP packet). Delivery / analysis), T.M. MSB First (transmission / analysis from upper bits) is set as the bit transmission / analysis order of 30 commands / image information.

  If the manufacturer is indefinite / unknown, the bit transmission / analysis order of the IFP packet is MSB First (transmission / analysis from upper bits), T.P. MSB First (transmission / analysis from upper bits) is set as the bit transmission / analysis order of 30 commands / image information.

  Here, for example, if the company code described in “T.38 VendorInfo” of “200 OK” is “91” indicating the company A, in step 804, the manufacturer-specific device setting information 420 is referred to. As the bit transmission / analysis order of the IFP packet at the time of transmission, MSB First (transmission / analysis from upper bits), T.P. As a bit transmission / analysis order of 30 commands / image information, MSB First (transmission / analysis from upper bits) is determined.

  In addition, when “200 OK” is transmitted to the receiving side device, next, T.P. It is determined whether image communication conforming to the standard 38 is possible (step 813). Here, the T.P. If it is determined that image communication conforming to H.38 is possible (YES in step 813), the bit transmission / analysis order at the time of incoming call is determined with reference to the device setting information 830 (step 814).

  Here, MSB First (transmission / analysis from the upper bits), T.B. Since LSB First (transmission / analysis from lower bits) is set as the bit transmission / analysis order of 30 commands / image information, the IFP packet is MSB First (from upper bits) as the bit transmission / analysis order upon arrival. Delivery / analysis), T.M. The 30 command / image information is determined to be LSB First (transmission / analysis from lower bits).

  As a result, the sending device and the receiving device have the same bit transmission order and analysis order for all layers.

  Thereafter, the transmitting side device transmits the T.P. T.38 port and the receiving side device. The FAX communication according to 38 is executed (step 805).

  Similarly, in the receiving side device, T.P. T.38 port and the transmitting side device. The FAX communication according to 38 is performed (step 815).

  When the call is disconnected at the calling side device due to the end of FAX communication or the like, a BYE (session cut request) is transmitted from the calling side device to the called side device, and the SIP call is cut (step 806). finish.

  Further, when receiving the BYE (session disconnection request) from the calling side device, the receiving side device disconnects the SIP call (step 816) and ends this processing.

  In step 803, the T.P. If it is determined that the image communication conforming to No. 38 is impossible (NO in Step 803), the process proceeds to Step 806 to disconnect the SIP call. In step 813, T.P. If it is determined that the image communication conforming to No. 38 is impossible (NO in Step 813), the process proceeds to Step 816 to disconnect the SIP call.

  FIG. 9 is a flowchart illustrating image communication control (FAX communication control) according to the seventh embodiment of the present invention.

  In the image communication control according to the seventh embodiment, after receiving the call connection response signal (CED) by the T.38 communication function from the partner machine, the T.30 command included in the IFP packet is received from the partner machine on the transmission side. If it cannot be received for a certain period of time, it is retransmitted to the other party, and the T.30 command and image information bit transmission and analysis order is reversed, and the T.30 command and image information are transmitted and analyzed.

  In FIG. 9, the caller side device sends an invitation SIP message “INVITE” to the partner device at the time of call connection (step 901).

  When the response SIP message “200 OK” to “INVITE” is received from the partner machine, a call connection is established with the partner machine (step 902). It is determined whether or not image communication based on the standard 38 is possible (step 903). Here, the T.O. If it is determined that image communication conforming to the standard 38 is possible (YES in step 903), the IFP packet is referred to by referring to preset device setting information (see, for example, the device setting information 320 shown in FIG. 3). The bit transmission / analysis order is determined (step 904).

  When the CED is received from the partner machine (step 905), the T.D. The bit transmission / analysis order of 30 commands / image information is determined (step 906). However, in step 906, if a pit inversion flag, which will be described later, is ON, the bit transmission / analysis order determined with reference to the device setting information is inverted.

  A predetermined timer (T1 timer) is started by reception of the CED, and the transmitting side device is set to T. 38 and the other aircraft at 38 ports. The FAX communication according to 38 is performed (step 907).

  This T.W. In the FAX communication conforming to the T.38, the T.38 is transmitted in the bit transmission / analysis order determined in Step 904. The transmission / analysis of the IFP packet including the (NSF) / (CSI) / DSI signal, which is a 30 command, is controlled, and in the bit transmission / analysis order determined in step 906, the T.30 command is transmitted. Transmission / analysis of 30 commands / image information is controlled.

This T.W. In FAX communication conforming to T.38, T.38 from the partner machine. 30 command reception is monitored (step 908). If 30 commands have not been received (NO in step 908), it is checked whether the T1 timer has timed out (step 909).
Here, if the T1 timer has not timed out (NO in step 909), the process returns to step 907 and T.P. The FAX communication according to 38 is continued.

  If it is determined in step 909 that the T1 timer has timed out (YES in step 909), the call is disconnected. Thereafter, it is checked whether or not there is a remaining number of retries set in advance (step 910). If there is a remaining number (YES in step 910), the bit inversion flag is turned on (step 911), and the process returns to step 901 to make a reconnection. I do.

  In this case, since the bit inversion flag is ON, the bit transmission / analysis order is inverted in step 906. In the FAX communication of step 907, the T.P. Transmission / analysis of 30 commands / image information is controlled.

  In step 912, if the bit inversion flag is already ON, the bit inversion flag is turned OFF.

  In step 908, T.P. When a 30 command is received (YES in step 908), a T.30 command with the partner machine is received. When the FAX communication conforming to the standard 38 is continued (NO in Step 902), the process returns to Step 907 and the T.P. The FAX communication according to 38 is continued.

  In step 902, T.P. When the FAX communication conforming to 38 is terminated (YES in step 912), the SIP call is disconnected (step 913), and this process is terminated.

  If it is determined in step 910 that there is no remaining number of retries (NO in step 910), the process proceeds to step 913, where the SIP call is disconnected, and this process ends.

  FIG. 10 is a flowchart illustrating image communication control (FAX communication control) according to the eighth embodiment of the present invention.

  In the image communication control according to the eighth embodiment, when the call connection response command (CED) cannot be received from the partner machine for a certain period of time, the call is retransmitted to the partner machine, and the bit transmission and analysis order of the IFP packet is reversed and T It is configured to send and analyze .30 commands and image information.

  In FIG. 10, the caller device sends an invitation SIP message “INVITE” to the partner device at the time of call connection (step 1001).

  When the response SIP message “200 OK” to “INVITE” is received from the partner machine, a call connection is established with the partner machine (step 1002). It is determined whether image communication compliant with the standard 38 is possible (step 1003). Here, the T.O. If it is determined that image communication conforming to the standard 38 is possible (YES in step 1003), the IFP packet is referred to by referring to preset device setting information (see, for example, the device setting information 320 shown in FIG. 3). The bit transmission / analysis order is determined (step 1004). However, in step 1004, if a pit inversion flag described later is ON, the bit transmission / analysis order determined with reference to the device setting information is inverted.

  Next, it is checked whether a CNG signal has been received from the partner machine (step 1005). If a CED signal is received (YES in step 1005), the T.D. 30 command / image information bit transmission / analysis order is determined (step 1006). T. 38 and the other aircraft at 38 ports. The FAX communication according to 38 is performed (step 1007).

  This T.W. In the FAX communication conforming to the T.38, in the bit transmission / analysis order determined in Step 1004, The transmission / analysis of the IFP packet including the 30 command (NSF) / (CSI) / DSI signals is controlled, and the bit transmission / analysis order determined in step 1006 Transmission / analysis of 30 commands / image information is controlled.

If it is determined in step 1005 that the CED signal has not been received (NO in step 1005), a predetermined timer (T0 timer) is started to check whether the T0 timer has timed out (step 1008). .
If the T0 timer has not timed out (NO in step 1008), the process returns to step 1005 and waits for reception of a CED signal from the partner machine.

  If it is determined in step 1008 that the T0 timer has timed out (YES in step 1008), it is checked whether there is a remaining retry count (step 1009). If there is a remaining (YES in step 1009), The bit inversion flag is set to ON (step 1010), and the process returns to step 1001 to perform a recall connection.

  In this case, since the bit inversion flag is ON, the bit transmission / analysis order is inverted in step 1004. In the FAX communication of step 1007, the IFP is transmitted in the bit transmission / analysis order in the inverted bit transmission / analysis order. Packet transmission / analysis is controlled.

  In step 1010, if the bit inversion flag is already ON, the bit inversion flag is turned OFF.

  In step 1011, it is checked whether or not the FAX communication in step 1007 is completed. If the FAX communication is not ended (NO in step 1011), the process returns to step 1007 and the T.P. The FAX communication conforming to No. 38 is continued, but if the communication is to be ended (YES in Step 1011), the SIP call is disconnected (Step 1012), and this process is ended.

  If it is determined in step 1009 that there is no remaining number of retries (NO in step 1009), the process proceeds to step 1012, where the SIP call is disconnected, and this process ends.

  FIG. 11 is a flowchart illustrating image communication control (FAX communication control) according to the ninth embodiment of the present invention.

  In the image communication control according to the ninth embodiment, after transmitting a call connection response signal (CED) by the T.38 communication function to the partner machine, the receiving side receives the T.30 command from the partner machine for a certain period of time. If not, hang up the call. Thereafter, it is re-transmitted to the other device, and the T.30 command and image information are transmitted and analyzed by reversing the bit transmission and analysis order of the T.30 command and image information.

  In FIG. 11, when the receiving side apparatus receives the invitation SIP message “INVITE” from the partner machine (step 1101), it transmits a response SIP message “200 OK” to this “INVITE” to the partner machine (step 1102).

  Next, T.W. It is determined whether or not image communication conforming to the standard 38 is possible (step 1103). If it is determined that image communication compliant with the standard 38 is possible (YES in step 1103), the bit transmission of the IFP packet is performed with reference to preset device setting information (for example, see the device setting information 320 shown in FIG. 3). / Analysis order is determined (step 1104).

  Next, referring to the device setting information, T.P. The bit transmission / analysis order of 30 commands / image information is determined (step 1105). However, if a pit inversion flag described later is ON in step 1105, the bit transmission / analysis order determined with reference to the device setting information is inverted.

  Thereafter, the receiving-side device makes the T. 38 and the other aircraft at 38 ports. The FAX communication according to 38 is performed (step 1106).

  This T.W. In the FAX communication conforming to 38, after transmitting the IFP packet indicating the CED signal in the bit transmission order determined in step 1104, the T1 timer is started and the NSF / CSI / DSI signal which is a T.30 command is started. Is transmitted. The transmission of the NSF / CSI / DSI signal is repeatedly transmitted when the TSI signal or the NSS signal is not received after a preset timer time T4 from the partner device.

In addition, this T.A. In FAX communication conforming to T.38, T.38 from the partner machine. 30 command reception is monitored (step 1107). If 30 commands have not been received (NO in step 1107), it is checked whether the T1 timer has timed out (step 1108).
If the T1 timer has not timed out (NO in step 1108), the process returns to step 1106, and the T.P. The FAX communication according to 38 is continued.

  If it is determined in step 1108 that the T1 timer has timed out (YES in step 1108), the call is disconnected. Thereafter, it is checked whether or not there is a remaining number of retries set in advance (step 1109). If there is a remaining number (YES in step 1109), the bit inversion flag is turned on (step 1110), and the process returns to step 1101 to Wait for a recall connection.

  In this case, since the bit inversion flag is ON, the bit transmission / analysis order is inverted in step 1105. In the FAX communication of step 1109, the T.P. Transmission / analysis of 30 commands / image information is controlled.

  In step 1110, if the bit inversion flag is already ON, the bit inversion flag is turned OFF.

  In step 1107, T.P. 30 command is received (YES in step 1107), and the T.30 command to the partner machine is received. If the FAX communication conforming to H.38 is to be continued (NO in step 1111), the process returns to step 1106 and the T.P. The FAX communication according to 38 is continued.

  In step 1111, T.P. When the FAX communication conforming to No. 38 is terminated (YES in Step 1111), the SIP call is disconnected (Step 1112), and this process is terminated.

  If it is determined in step 1109 that there is no remaining number of retries (NO in step 1109), the process proceeds to step 1112, where the SIP call is disconnected, and this process ends.

  Although the above is an example of typical embodiment of this invention, this invention is not limited to the Example shown in the said Example and drawing, It can implement suitably deform | transforming within the range which does not change the summary. It is.

DESCRIPTION OF SYMBOLS 100 Image communication apparatus 101 Main control part 102 Image storage part 103 Image reading part 104 Printing part 105 Operation part 106 Storage part 107 Image processing part 108 Call connection control part 109 Image communication control part 110 Bus 111 Packet control part 112 TCP / UDP / IP control unit 113 Network interface unit

Claims (2)

A packet control unit that transmits and receives IFP packets by the T.38 communication function;
Image communication control means for controlling image communication by describing a T.30 command and image information in the field of the IFP packet;
The packet control unit
Setting means for setting order information indicating respective bit transmission and analysis orders corresponding to the IFP packet, the T.30 command, and the image information;
Control means for controlling the bit transmission and analysis order of the IFP packet, the T.30 command, and the image information based on the order information set in the setting means ,
After receiving the call connection response signal by the T.38 communication function, if the T.30 command cannot be received on the calling side for a certain period of time, the call is disconnected and then re-transmitted to the partner machine. An image communication apparatus for transmitting and analyzing T.30 commands and image information by reversing the bit transmission and analysis order of image information . The packet control unit
After the call connection by the T.38 communication function is completed successfully, if the call connection response command at the calling side can not receive a fixed time after call disconnection, then re-transmitted to the far machine, bit is sent and the IFP packet Reverses the analysis order and sends and analyzes IFP packets
The image communication apparatus according to claim 1 .

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