JP5578065B2 - COMMUNICATION DEVICE, COMMUNICATION DEVICE PROGRAM, AND COMMUNICATION DEVICE CONTROL METHOD - Google Patents

Description

  The technology disclosed in this specification relates to a communication apparatus that performs communication using an IP (Internet Protocol) network.

  Patent Document 1 discloses an information relay device (router) that determines the type of a telephone line connected to a telephone line connection port. This information relay apparatus first detects the presence or absence of a dial tone when the power is turned on. If a dial tone is detected, it can be determined that the telephone line is an analog telephone line. If no dial tone is detected, a TE layer 1 activation sequence is executed. If synchronization can be established by this TE layer 1 activation sequence, it can be determined that the line is an ISDN (Integrated Service Digital Network) line. If synchronization cannot be established, it is determined that the line is not connected. And the determination result is displayed using LED.

  Patent Document 2 discloses a communication terminal device that can be connected to an IP (Internet Protocol) network line and a public line network. In this communication terminal device, the public telephone line network is captured by going off-hook. The public telephone line network transmits a dial tone by capturing the public line network off-hook. When the communication terminal apparatus detects a dial tone, the communication terminal apparatus switches the connection from the public telephone line network to the IP network. The IP network transmits a signal that can be distinguished from a dial tone (usually a continuous tone of 400 Hz) transmitted by a switch of a public telephone line network. Therefore, the communication terminal device can surely recognize that the connection has been switched to the IP network.

JP 2002-158799 A JP 2005-94225 A

  An IP communication process for performing communication using an IP network using general identification information (for example, a FAX number) for a general public line network has become widespread. In order to perform IP communication processing, it is necessary to use a server capable of executing IP communication processing. However, with the techniques of Patent Documents 1 and 2, it is impossible to distinguish which server is used in the IP network. That is, the type of IP network (for example, the type of provider) cannot be distinguished. Then, a situation may occur in which the user does not notice that the IP communication process cannot be performed because the server is connected to a server that cannot execute the IP communication process. In this specification, the technique which can eliminate such inconvenience is provided.

The communication device described in the present application is a communication device that belongs to a local communication network including a DHCP server and can be connected to a SIP server, and the SIP server can construct a specific IP network. The SIP server can control communication between the communication destination external device and the communication device by communication processing via the specific IP network, and the DHCP server can communicate with the external device that the communication device can communicate with. First provider identification information indicating a provider providing a communication network can be stored, and the DHCP server is DHCP information used for the communication device to perform various communications, The DHCP information including one provider identification information can be provided to the communication device, and the second provider identification information for identifying the provider of the specific IP network is stored in the storage unit of the communication device. A setting unit for storing, an acquisition unit for acquiring DHCP information from a DHCP server, and first provider identification information included in the DHCP information acquired by the first acquisition unit is stored in a storage unit; And a first notification unit that notifies that communication processing via the specific IP network cannot be performed when the information does not match the provider identification information of the second IP.
The communication apparatus described in the present application is a communication apparatus connected to the IP network, and uses the IP identification information to determine whether to execute an IP communication process for communication via a server used in the IP network. A setting unit that performs setting, a confirmation unit that confirms whether or not communication with the server is possible, a determination unit that determines whether or not the server can execute IP communication processing, If it is not confirmed that communication is possible, or if it is determined that the IP communication process cannot be executed by the determination unit, and if the setting unit is set to execute the IP communication process, the IP communication process And a first notification unit that notifies that it cannot be executed.

  With the above configuration, the communication apparatus can determine whether or not a server capable of executing IP communication processing is used. As an example of a server capable of executing IP communication processing, there is a SIP server that performs call control such as associating a telephone number with an IP address or calling a partner using a protocol called SIP (Session Initiation Protocol). Can be mentioned. When it is determined that communication with the server is not possible, or when it is determined that the server cannot execute IP communication processing, the communication device is set to execute IP communication processing. Is notified to the user that it cannot be executed. Accordingly, it is possible to notify the user that the IP communication process cannot be performed even though the user desires to execute the IP communication process. Normally, IP communication processing using an IP network has many advantages for users (for example, low communication charges and high communication speed) compared to general communication processing using a general public line network. It is possible to improve user convenience.

  In the communication device according to claims 2 to 4, it is possible to appropriately determine whether or not the IP communication processing can be executed.

  In the communication device according to claim 5, if the communication device is set not to execute the IP communication processing even when the IP communication processing can be executed, the user is notified of the fact. can do. Therefore, it is possible to avoid a situation in which the IP communication process is not performed because the user cannot recognize that the IP communication process can be executed even though the IP communication process can be executed.

  In the communication device according to the sixth aspect, when the communication device is electrically connected to the IP network, reconfirmation as to whether or not communication with the server is possible is automatically performed. Therefore, it is possible to eliminate the necessity for the user to manually check the communication with the server, so that convenience for the user can be improved.

  In the communication device according to claims 7 and 8, when a situation where the IP communication process cannot be executed occurs, the user can be notified of the cause of the IP communication process not being executed. Therefore, since the user can recognize the solution for enabling the IP communication processing, the user convenience can be improved.

  In the communication device according to claim 9, when the communication device is set not to execute the IP communication processing in a state where the IP communication processing can be executed, the setting of the communication device is changed to the IP communication processing. It is possible to easily change the setting to be executed. Therefore, user convenience can be improved.

An example of a structure of a communication system is shown. The flowchart of a main process is shown. The flowchart of an abnormality check process is shown. The flowchart of a network status confirmation process is shown. The flowchart of a DHCP information analysis setting process is shown. The flowchart of a FAX transmission process is shown.

(System configuration)
Embodiments will be described with reference to the drawings. As shown in FIG. 1, a communication system 2 includes a PSTN (Public Switched Telephone Networks) 4, a first IP network 8, a second IP network 95, a LAN 6, a LAN 9, a LAN 90, FAX apparatuses 10 and 110, a PC ( Personal computer) 92, SIP (Session Initiation Protocol) server 60, and home gateways 71 and 91.

  The home gateway 71 is a device that plays a role of connecting the first IP network 8 and the LAN 6 to each other and absorbing differences between the networks. Similarly, the home gateway 91 is a device that connects the second IP network 95 and the LAN 90 to each other. Each of the home gateways 71 and 91 includes DHCP (Dynamic Host Configuration Protocol) servers 70 and 94.

  The FAX apparatuses 10 and 110 are connected to the PSTN 4. The FAX apparatuses 10 and 110 can communicate with each other via the PSTN 4. The FAX apparatus 10 and the home gateway 71 are connected to the LAN 6. The FAX apparatus 10 and the home gateway 71 can communicate with each other via the LAN 6. The FAX apparatus 110 is connected to the LAN 9. The LAN 6, LAN 9, and SIP server 60 are connected to the first IP network 8. The FAX apparatus 10, FAX apparatus 110, and SIP server 60 can communicate with each other via the LANs 6 and 9 and the first IP network 8.

  The first IP network 8 is an IP network provided by a first provider (Internet connection provider). The first IP network 8 is controlled by the SIP server 60. An example of the first IP network 8 is NGN (Next Generation Network). NGN is a next-generation IP network that replaces the current public network. In other words, the NGN is a network in which an Internet service IP network and a telephone service telephone network, which are currently constructed separately, are integrated as an IP communication network using IP technology.

  The PC 92 and the home gateway 91 are connected to the LAN 90. The PC 92 and the DHCP server 94 can communicate with each other via the LAN 90. The LAN 90 is connected to the second IP network 95. The second IP network 95 is an IP network provided by a second provider. An example of the second IP network 95 is an IP network according to IPv4 (Internet Protocol Version 4) or IPv6 (Internet Protocol Version 6).

(Configuration of FAX machine 10)
The configuration of the FAX apparatus 10 will be described. The FAX apparatus 10 has multiple functions such as a general FAX function, an IPFAX (Internet Protocol FAX) function, a copy function, a printer function, and a scanner function. The general FAX function communicates (that is, transmits / receives) FAX data via the PSTN 4 using a general FAX number that is identification information (so-called FAX number) of each FAX apparatus for executing communication via the PSTN 4. It is a function for. As an example of the general FAX number, there is a telephone number (for example, 0ABJ or E.164 format) assigned by a communication company at the time of contract. The IPFAX function is a function for communicating FAX data via the first IP network 8 using SIP URI (SIP Uniform Resource Identifier).

  The FAX apparatus 10 includes a display unit 12, an operation unit 14, a scan unit 16, a PSTN interface 18, a print execution unit 20, a network interface 22, and a control unit 24. In addition, each said part 12-24 is connected to the bus line 25. FIG. The display unit 12 is a display for displaying various information. The operation unit 14 includes a plurality of keys. The user can input various instructions to the FAX apparatus 10 by operating the operation unit 14. The scanning unit 16 includes a scanning mechanism such as a CIS (contact image sensor) and a CCD, and generates image data by scanning a scanning object. The PSTN interface 18 is connected to the PSTN 4 via the connector 19. The print execution unit 20 includes a printing mechanism such as an inkjet head method or a laser method, and performs printing according to an instruction from the control unit 24. The network interface 22 is connected to the LAN 6 via the connector 23.

  The control unit 24 includes a CPU 30 and a memory 32. The memory 32 stores a program 34, an enterprise-number table 35, and an address book 36. The CPU 30 executes processing according to the program 34 in the memory 32. When the CPU 30 executes processing according to the program 34, the determination unit 44, the first notification unit 48, the second notification unit 49, the setting unit 50, the confirmation unit 52, the first acquisition unit 54, the second acquisition unit 55, and the detection unit. 58 is realized. The enterprise-number table 35 is a table that stores an enterprise-number indicating providers (hereinafter referred to as “first type providers”) that can provide the FAX apparatus 10 with a state in which the IPFAX function can be executed. enterprise-number is an enterprise code number unique to each provider. The address book 36 stores a plurality of general FAX numbers, SIP URIs, mail addresses, telephone numbers and the like input by the user.

  The memory 32 stores a DHCP server flag, IPFAX settings, various return values, errors, and the like, which will be described later.

(Configuration of SIP server 60)
The configuration of the SIP server 60 will be described. For each of the FAX apparatuses 10 and 110, the SIP server 60 stores the IP address of the FAX apparatus and the SIP URI of the FAX apparatus in association with each other. The SIP server 60 is connected to the first IP network 8. The SIP server 60 controls the establishment of communication between the FAX apparatus 10 and the FAX apparatus 110 using SIP.

(Configuration of DHCP servers 70 and 94)
The configuration of the DHCP server 70 will be described. The DHCP server 70 is connected to the LAN 6. The DHCP server 70 assigns an IP address to each device (FAX device 10 or the like) connected to the LAN 6.

  The configuration of the DHCP server 94 will be described. The DHCP server 94 is connected to the LAN 90. The DHCP server 94 assigns an IP address to each device (PC 92 or the like) connected to the LAN 90.

(Configuration of FAX machine 110)
The FAX apparatus 110 has the same functions as those of the FAX apparatus 10 described above. The FAX apparatus 110 includes a display unit 112, an operation unit 114, a scanning unit 116, a PSTN interface 118, a print execution unit 120, a network interface 122, and a control unit 124. Each of the above-described units 112 to 124 is connected to the bus line 125. The configurations of the units 112 to 124 are the same as the configurations of the units 12 to 24 of the FAX apparatus 10 described above. The control unit 124 includes a CPU 130 and a memory 132 in the same manner as the control unit 24 described above. In this embodiment, the FAX machine 110 is assigned a general FAX number “xxxyyyzzz” and SIPURI “xxxyyzzzz@sipuri.com” (see FIG. 1). The SIP URI of the FAX apparatus 110 includes the general FAX number “xxxyyzzzz” of the FAX apparatus 110. More specifically, the SIP URI of the FAX apparatus 110 is obtained by adding the domain “sipuri.com” of the SIP server 60 to the general FAX number “xxxyyyzzz” of the FAX apparatus 110. The FAX number, SIP URI, and mail address of the FAX apparatus 110 are all registered in the address book 36 of the FAX apparatus 10.

(Configuration of communication system)
The configuration of the communication system 2 shown in FIG. 1 will be described. In the communication system 2 of FIG. 1, the FAX apparatus 10 can be connected to the first IP network 8 and the PC 92 can be connected to the second IP network 95. In this case, the user needs to make a communication contract with the first provider that provides the first IP network 8 and the second provider that provides the second IP network 95. Hereinafter, the provider contracted by the user is referred to as “contract provider”.

  Here, there are two types of providers: a first type provider and a second type provider. As described above, the first type provider is a provider that can provide the FAX apparatus 10 with the IPFAX function using the SIP URI including the general FAX number. When the user contracts with the first type provider, the SIP URI of the FAX apparatus 10 includes the general FAX number of the FAX apparatus 10. Specifically, the SIP URI “xxxyyzzzz@sipuri.com” of the FAX apparatus 110 includes the general FAX number “xxxyyyzzz” of the FAX apparatus 110. The second type provider is a provider that cannot provide the FAX apparatus 10 with an IPFAX function using SIP URI. An example of the second type provider is a provider that does not provide an IPFAX function. Further, there is a case where the provider provides the IPFAX function as an option, but the user has not selected the option.

  In the example of the present embodiment, the type of the first provider that provides the first IP network 8 is the first type provider, and the type of the second provider that provides the second IP network 95 is the second type provider. The case where it is is demonstrated.

  In this case, the IP address of the SIP server 60 provided by the first provider and the enterprise-number of the first provider are registered in advance in the DHCP server 70. Thereby, the DHCP server 70 can include option 120 (IP address of the SIP server 60) and option 125 (provider information indicating the first provider) in DHCP information described later. Further, the enterprise-number of the first provider is stored in the enterprise-number table 35 of the FAX apparatus 10.

  Further, the enterprise-number of the second provider is registered in advance in the DHCP server 94. Accordingly, the DHCP server 94 can include option 125 (provider information indicating the second provider) in the DHCP information described later. In addition, registration to the DHCP server such as enterprise-number may be performed by a provider, for example.

  In the example of the present embodiment, the first IP network 8 provided by the first provider converts the general FAX number (for example, 0ABJ or E.164 format) into a URI by the SIP server 60, and converts the general FAX number into the URI. It can be a unique address on the network. In this way, since mapping of SIPURI and general FAX number is performed, when transmitting a FAX, if the general FAX number is input to the FAX apparatus 10, an IP address is obtained from the SIP server 60, and a connection is established. IPFAX processing can be executed. Therefore, user convenience can be improved.

  According to the IPFAX process using the first IP network 8, high-speed (high speed exceeding 33600 b / s) and high-security image data transmission can be performed in real time (without accumulating in the server). . At this time, since the transmission is performed using the first IP network 8, it is possible to transmit image data instead of fax between an unspecified number of companies as in the case of the conventional telephone line (PSTN). . In particular, by using the first provider's first IP network 8, the destination specified by the telephone number is under the control of the first provider, and a third party cannot impersonate the destination. "To avoid receiving security threats.

(Processing executed by FAX machine 10)
Next, each process executed by the control unit 24 of the FAX apparatus 10 will be described with reference to FIGS.

(Main process)
In S <b> 102, the CPU 30 turns on the power of the FAX apparatus 10. This process is performed, for example, in response to the user turning on the power switch of the operation unit 14.

  In S104, the CPU 30 determines whether provider setting input has been executed. When the setting input has been executed (S104: YES), the process proceeds to S108, and when it has not been executed (S104: NO), the process proceeds to S106. In S106, provider setting (IP address of SIP server 60, SIP domain name of SIP server 60, enterprise-number specifying the first provider, etc.) is performed by the user operating the operation unit 14 and performing a predetermined storage operation in S106. Can be stored in the memory 32 or the enterprise-number table 35 in advance. In general, the IP address of the SIP server 60 and the SIP domain name of the SIP server 60 are provided to the user by a contract provider.

  In S108, the CPU 30 determines whether or not the IPFAX setting has been set. If the IPFAX settings have been set (S108: YES), S110 is skipped and the process proceeds to S114. On the other hand, if the IPFAX setting has not been set (S108: NO), the process proceeds to S110, and the setting unit 50 (see FIG. 1) executes an IPFAX setting process. The IPFAX setting process is a process for causing the user to select an operation mode of the FAX apparatus 10. The setting unit 50 causes the display unit 12 to display a predetermined mode selection screen (not shown). The user operates the operation unit 14 while viewing the mode selection screen, and selects a desired operation mode from two operation modes of “general FAX” and “IPFAX”. When the “IPFAX” operation mode is selected, the setting unit 50 stores the IPFAX setting = “ON” in the memory 32. On the other hand, when the operation mode of “general FAX” is selected, the setting unit 50 stores IPFAX setting = “OFF” in the memory 32. Then, the process proceeds to S114. Note that the default operation mode information indicating “general FAX” may be stored in the memory 32 when the FAX apparatus 10 of this embodiment is shipped.

  In S114, the CPU 30 performs an abnormality check process. Details of the abnormality check process will be described later.

  In S116, the CPU 30 performs an operation reception process. Specifically, the CPU 30 monitors whether a FAX transmission operation is input after the FAX apparatus 10 is activated. In this state, the user sets a document on an automatic document feeder (not shown), and operates the operation unit 14 to identify identification information (FAX number “xxxxyyzzzz”, SIPURI “xxxyyzzzz @ shown in FIG. 1”). any one of "sipuri.com". The identification information of the FAX apparatus 110 can be designated by designating a plurality of symbols (numerals, alphabets, etc.) in order, or by designating identification information stored in the address book 36. it can.

  In S118, the CPU 30 determines whether or not a FAX transmission operation has been executed. Specifically, it waits for the user to operate the operation unit 14 to input a predetermined FAX transmission operation. When the FAX transmission operation is performed (S118: YES), the process proceeds to S120, and the CPU 30 executes a FAX transmission process. Details of the FAX transmission process will be described later. If the FAX transmission operation is not performed (S118: NO), the process proceeds to S122.

  In S122, the CPU 30 determines whether or not it is an abnormality check timing. The timing of the abnormality check includes the timing at which the LAN cable is connected to the connector 23. Further, there is a timing when the network setting is changed, such as when the enterprise-number or the like is stored in the memory 32 in S106, or when the IPFAX setting is set in S110. In addition, there is a timing at which the FAX apparatus 10 acquires information such as an IP address as the DHCP server IP address lease period elapses. Note that the CPU 30 may periodically perform an abnormality check.

(Abnormality check processing (part 1))
The contents of the abnormality check process performed in S114 will be described with reference to the flowchart of FIG. First, in S212, the CPU 30 executes a network state confirmation process.

(Network status confirmation process)
The contents of the network status confirmation process performed in S212 will be described using the flow of FIG. In S <b> 312, the detection unit 58 detects whether the FAX apparatus 10 is electrically connected to the LAN. Specifically, it is detected whether or not the line voltage of the network interface 22 is equal to or higher than a predetermined value. When it is determined that they are not electrically connected (S312: NO), the process proceeds to S314. In S314, the detection unit 58 clears the DHCP server flag stored in the memory 32 to “not found”, and then proceeds to S336.

  On the other hand, when it is determined that they are electrically connected (S312: YES), the process proceeds to S316. In S316, the CPU 30 determines whether a DHCP server has been discovered. This determination is made by reading out whether the DHCP server flag stored in the memory 32 is “discovered” or “not found”. If it is “discovered” (S316: YES), the process proceeds to S328, and if it is “not found” (S316: NO), the process proceeds to S318.

  In S318, the confirmation unit 52 (see FIG. 1) searches for a DHCP server. Specifically, the confirmation unit 52 broadcasts a search command for searching for the DHCP server 70 connected to the LAN 6. Each device connected to the LAN 6 receives the search command. When receiving the search command, the DHCP server 70 connected to the LAN 6 transmits a response packet including its own IP address to the FAX apparatus 10.

  In S320, the confirmation unit 52 determines whether a DHCP server has been found. Specifically, the confirmation unit 52 determines YES in S320 when a response packet is received within a predetermined time after broadcasting the search command. If NO in S320, the process proceeds to S324. In S324, the CPU 30 stores “not found” in the DHCP server flag in the memory 32, and then proceeds to S336. On the other hand, if YES in S320, the process proceeds to S326. In S326, the CPU 30 stores “discovered” in the DHCP server flag in the memory 32, and then proceeds to S328.

  In S <b> 328, the first acquisition unit 54 transmits a request command for requesting transmission of DHCP information to the DHCP server 70. The first acquisition unit 54 transmits a request command with the IP address of the DHCP server 70 included in the response packet received from the DHCP server 70 as a transmission destination. The request command is a command for requesting option 120 and option 125. Note that the option 120 includes the IP address of the SIP server 60 provided by the first provider. Further, the option 125 includes an enterprise-number indicating the first provider. When receiving the request command, the DHCP server 70 transmits DHCP information including various types of information corresponding to the request command to the FAX apparatus 10. In S330, the first acquisition unit 54 receives the DHCP information transmitted by the DHCP server 70.

  In S332, the CPU 30 executes a DHCP information analysis setting process. The DHCP information analysis setting process is a process for determining whether or not the IPFAX function can be used. Details of the DHCP information analysis setting process will be described later.

  In S334, the CPU 30 determines whether or not the IPFAX function can be used. This determination is made based on the result of the DHCP information analysis setting process in S332. If it is determined that the IPFAX function can be used (S334: YES), the process proceeds to S340, and the CPU 30 sets “IPFAX function available” as the return value. Then, the network status confirmation process ends. On the other hand, when it is determined that the IPFAX function cannot be used (S334: NO), the process proceeds to S336. In S <b> 336, the CPU 30 sets “IPFAX function not usable” to the return value. In S <b> 338, the CPU 30 stores in the memory 32 an error that causes the IPFAX function to be unusable. As an example of the error, if it is determined in S312 that the FAX apparatus 10 is not electrically connected to the LAN (S312: NO), the error is “link down (network cable not connected)”. . In S320, if a DHCP server is not found (S320: NO), an error “DHCP server not found” is assumed. If the IPFAX function cannot be used as a result of the DHCP information analysis setting process (S334: NO), an error “DHCP information is invalid” is assumed. Then, the network state confirmation process ends.

(DHCP information analysis setting process)
The contents of the DHCP information analysis setting process performed in S332 will be described using the flow of FIG. In S410, the confirmation unit 52 and the second acquisition unit 55 determine whether or not the received DHCP information includes the option 120. For example, when the IP address of the SIP server 60 provided by the first provider is registered in advance in the searched DHCP server, the DHCP information includes an option 120 indicating the IP address of the SIP server 60. . In this case, YES is determined in S410, and the process proceeds to S412.

  On the other hand, if the IP address of the SIP server 60 provided by the first provider is not registered in the searched DHCP server, option 120 is not included in the DHCP information. In this case, since communication with the SIP server 60 is impossible, it is determined that the IPFAX function cannot be used (S410: NO), and the process proceeds to S420. As an example of a case where NO is determined in S410, there is a case where the connectors 23 and 93 are inserted incorrectly and the FAX apparatus 10 is connected to the LAN 90. In this case, the DHCP server 94 is searched in S318 (FIG. 4), and DHCP information is received from the DHCP server 94 in S330. However, since the IP address of the SIP server 60 is not registered in the DHCP server 94, the DHCP information does not include the option 120, and NO is determined in S410.

  In S412, the CPU 30 determines whether or not the received DHCP information includes the option 125. For example, when the contract provider enterprise-number is registered in the searched DHCP server, the DHCP information includes an option 125 indicating the contract provider enterprise-number. In this case, YES is determined in S412, and the process proceeds to S414. On the other hand, for example, when the enterprise-number of the contract provider is not registered in the searched DHCP server (for example, when the user does not contract with the provider), the DHCP information does not include the option 125. In this case, it is determined that the IPFAX function cannot be used (S412: NO), and the process proceeds to S420.

  Note that there may be a case where FAX transmission / reception using the IP network is performed without using a contract provider, as in the case where the SIP server 60 is connected to the LAN 6. In such a case, the DHCP server 70 stores the value of option 120, but does not store the value of option 125. Also in this case, NO is determined in S412.

  In S414, the CPU 30 determines whether the enterprise-number included in the option 125 matches any enterprise-number included in the enterprise-number table 35 (see FIG. 1). In this example, the enterprise-number table 35 stores the enterprise-number of the first provider. Therefore, it is determined whether the enterprise-number included in the option 125 matches the enterprise-number of the first provider. If they do not match (S414: NO), it is determined that the IPFAX function cannot be used because it is not connected to the IP network provided by the first type provider (provider that can provide the IPFAX function). Therefore, it progresses to S420. On the other hand, if they match (S414: YES), it is determined that the FAX machine 10 can use the IPFAX function, and the process proceeds to S416.

  In S <b> 416, the CPU 30 stores the value indicated by the option 120 in the memory 32 as the IP address of the SIP server 60. Furthermore, in S418, the CPU 30 sets a return value that the FAX apparatus 10 can use the IPFAX function. Then, the DHCP information analysis setting process ends.

  In addition, when it is determined NO in any of the above S410, S412, and S414, it means that it is determined that the FAX apparatus 10 is not in a state where the IPFAX function can be used. In this case, in S420, the determination unit 44 sets the return value that the FAX apparatus 10 is not in a state in which IPFAX can be used. Then, the DHCP information analysis setting process ends.

(Abnormality check processing (part 2))
Returning to the flow of FIG. 3, the contents of the abnormality check process will be described. In S214, the CPU 30 determines whether or not the IPFAX function can be used. Specifically, the determination is made based on the return value stored in the memory 32. If it is determined that the IPFAX function cannot be used (S214: NO), the process proceeds to S216.

  In S216, the CPU 30 determines whether or not the IPFAX setting is “ON”. Specifically, the IPFAX setting stored in the memory 32 is read and determined. If the IPFAX setting is “ON” (S216: YES), the process proceeds to S218. In S <b> 218, the first notification unit 48 displays an abnormality notification message on the display unit 12. The content of the message may be determined according to the error stored in S338. For example, in the case of a link down error (S312: NO), “Not connected to network” may be displayed. In the case of an error that the DHCP server is not found (S320: NO), “Server not found” or the like may be displayed. If the DHCP information is an illegal error (S334: NO), a message such as “Connected to wrong network” may be displayed.

  On the other hand, if it is determined in S214 that IPFAX can be used (S214: YES), the process proceeds to S222. In S222, the CPU 30 determines whether or not the IPFAX setting is “ON”. If the IPFAX setting is “ON” (S222: YES), S224 is skipped and the process proceeds to S226. If the IPFAX setting is “OFF” (S222: NO), the process proceeds to S224.

  In S224, the second notification unit 49 displays a message indicating that the IPFAX function can be used on the display unit 12. The setting unit 50 also receives an input for changing the IPFAX setting from “off” to “on”.

  In S226, the setting unit 50 determines whether or not an instruction to change the IPFAX setting to “ON” has been input. If it has not been input (S226: NO), the flow ends. If it has been input (S226: YES), the process proceeds to S228. In S <b> 228, the CPU 30 stores IPFAX setting = “ON” in the memory 32. As a result, when the IPFAX setting is “OFF” in a state where the IPFAX can be executed, the IPFAX setting can be easily changed to “ON”. Therefore, user convenience can be improved.

(FAX transmission processing)
The contents of the FAX transmission process performed in S120 of FIG. 2 will be described using the flow of FIG. Hereinafter, the content of the FAX transmission process will be described by taking as an example a case where the FAX apparatus 10 transmits FAX data to the FAX apparatus 110.

  In order to perform this processing, it is necessary that the memory 32 stores the IP address of the SIP server 60 and the SIP domain name (sipuri.com (see FIG. 1)) of the SIP server 60 as preconditions. It is. If it is determined in the DHCP information analysis setting process of FIG. 5 that the FAX apparatus 10 can use IPFAX (YES in S414), the IP address of the SIP server 60 is stored in the memory 32 (S416). . However, if it is determined in the DHCP information analysis setting process that IPFAX cannot be used (NO in any of S320, S410, S412, and S414), the IP address of the SIP server 60 is stored in the memory 32. Not.

  In S532, the CPU 30 acquires FAX data. Specifically, the CPU 30 causes the scanning unit 16 to scan a document set on the automatic document feeder. Thereby, the scanning unit 16 generates scan data. The communication unit 40 acquires FAX data by acquiring scan data from the scan unit 16.

  Next, in S534, the CPU 30 acquires the identification information of the transmission destination designated by the user. For example, when “general FAX” is selected by the user as the operation mode of the FAX apparatus 10, the user normally assumes that the general FAX transmission process is executed, and the general FAX number (that is, a numeric string). Is specified as the destination. In this case, in S534, the CPU 30 acquires a general FAX number (in the present embodiment, a general FAX number “xxxyyyzzz” of the FAX apparatus 110). For example, when “IPFAX” is selected by the user as the operation mode of the FAX apparatus 10, the user normally designates SIP URI as a transmission destination on the assumption that the IPFAX transmission process is executed. In this case, in S534, the communication unit 40 acquires SIPURI (SIPURI “xxxyyyzzz@sipuri.com” of the FAX apparatus 110 in this embodiment).

  In S538, the CPU 30 confirms whether or not the FAX apparatus 10 is in a state where the IPFAX function can be used. Specifically, the CPU 30 determines whether or not the return value stored in the memory 32 indicates that the FAX apparatus 10 is in a state where the IPFAX can be used. When the return value is information indicating that the FAX apparatus 10 is in a state in which IPFAX can be used, the CPU 30 determines YES in S538.

  In the present embodiment, it is determined in the network status confirmation process (see FIG. 4) whether or not the FAX apparatus 10 is already in a state where the IPFAX function can be used. Therefore, in the FAX transmission process, the CPU 30 does not need to execute the determination again (that is, it is not necessary to execute the processes of S332 and S334 in FIG. 4), and the CPU 30 receives the general FAX number by the user ( In S534), the result of the determination made in the network status confirmation process may be confirmed (S538). Since the processing load of the above determination is higher than the determination processing of the determination result information stored in the memory 32, the processing load of the FAX apparatus 10 in the FAX transmission processing can be reduced.

  If YES in S538, the communication unit 40 reads the IP address of the SIP server 60 and the SIP domain name of the SIP server 60 from the memory 32 (S540). In S540, since the FAX apparatus 10 is in a state in which IPFAX can be used (the first provider is the first type provider), the CPU 30 reads the IP address stored in the memory 32 in S416 of FIG. Further, the CPU 30 reads the SIP domain name of the SIP server 60 stored in the memory 32 by the predetermined storage operation. Next, the CPU 30 determines the SIP URI “xxxyyzzzz @ sipuri” of the destination FAX apparatus 110 from the SIP domain name (sipuri.com) read in S540 and the identification number (FAX number “xxxyyyzzz”) acquired in S534. .Com "(see FIG. 1) is generated (S542).

  Next, the CPU 30 transmits INVITE to the SIP server 60 using the SIP URI generated in S542 as a transmission destination (S544). The SIP server 60 transfers INVITE to the FAX apparatus 110. When the FAX apparatus 110 receives INVITE, the FAX apparatus 110 transmits 200 OK to the SIP server 60. The SIP server 60 transfers 200 OK to the FAX apparatus 10.

  After transmitting INVITE, the CPU 30 monitors whether or not 200 OK has been received (S546). If CPU30 receives 200OK which SIP server 60 transferred, it will judge YES. If YES in S546, the CPU 30 transmits an ACK to the SIP server 60 with the SIP URI as the transmission destination (S548). The SIP server 60 transfers ACK to the FAX apparatus 110. The FAX apparatus 110 receives ACK. Thereby, a communication session is established between the FAX apparatus 10 and the FAX apparatus 110 (S550). Next, the CPU 30 transmits the FAX data acquired in S532 to the FAX apparatus 110 via the first IP network 8 without relaying the SIP server 60 (S552). When the transmission of the FAX data is completed, the CPU 30 ends the FAX transmission process.

  On the other hand, if NO in S538 or NO in S546, the CPU 30 makes a call via the PSTN 4 with the general FAX number “xxxyyzzzz” acquired in S534 as a transmission destination, and establishes a communication path (S554). ). When the communication path is established between the FAX apparatus 10 and the FAX apparatus 110, the CPU 30 transmits the FAX data acquired in S532 to the FAX apparatus 110 via the PSTN 4 (S556). When the transmission of the FAX data is completed, the CPU 30 ends the FAX transmission process.

  In the present embodiment, as described above, when the CPU 30 cannot receive 200 OK within a predetermined time in S546 (NO in S546), that is, the IPFAX transmission process using the SIP URI generated in S542 has failed. In this case, a general FAX transmission process using the FAX number acquired in S534 is executed (S554, S556). Therefore, the FAX apparatus 10 can appropriately execute the FAX transmission desired by the user even when the IPFAX transmission process fails. Further, since the general FAX transmission process is executed using the FAX number already acquired in S534 without requiring a new operation from the user, the user does not need to input the FAX number again. Therefore, the work burden on the user can be reduced.

(effect)
The effect of the FAX apparatus 10 according to the present embodiment will be described. In the FAX apparatus 10 of the present embodiment, when it is determined that the IPFAX function cannot be executed, if the FAX apparatus 10 is set to execute the IPFAX function, the user is notified that the IPFAX function cannot be executed. Is done. Accordingly, it is possible to notify the user that the IPFAX cannot be executed even though the user desires to execute the IPFAX.

  Further, in the FAX apparatus 10 of the present embodiment, even when the IPFAX process can be executed, if the FAX apparatus 10 is set not to execute the IPFAX process, the fact is notified to the user. Can do. Therefore, it is possible to avoid a situation in which the IPFAX process is not performed because the user cannot recognize that the IPFAX process can be executed even though the IPFAX process can be executed.

  Further, in the FAX apparatus 10 according to the present embodiment, when a situation in which the IPFAX process cannot be executed occurs, in S218 (FIG. 3), it is possible to notify the user of the cause that the IPFAX process cannot be executed. Therefore, since the user can recognize a solution for enabling the IPFAX process, the convenience for the user can be improved.

(Modification)
The modifications of the above embodiment are listed below. An example of the first IP network 8 is not limited to NGN, but may be a communication network according to IPv4 or IPv6. In this case, mapping between SIP URI and general FAX number is not performed. Therefore, when executing the IPFAX process using the FAX apparatus 10, it is necessary to input information different from the general FAX number to the FAX apparatus 10.

  Moreover, although the case where a user memorize | stores enterprise-number in the enterprise-number table 35 was demonstrated in S106, it is not restricted to this form. The enterprise-number may be stored in advance in the enterprise-number table 35 by the vendor of the FAX apparatus 10. Further, for example, the FAX apparatus 10 may acquire an enterprise-number from a predetermined server (for example, a server provided by a vendor of the FAX apparatus 10) and store it in the enterprise-number table 35.

  The determination of whether or not the FAX apparatus 10 can use the IPFAX function is not limited to the method of determining using the enterprise-number, and can be performed by any method. For example, the user may directly input state information indicating whether or not the FAX apparatus 10 is in a state in which the IPFAX function can be used directly into the memory 32 in advance. In that case, the determination unit 44 may determine whether or not the FAX apparatus 10 is in a state in which the IPFAX function can be used according to the state information input by the user.

  In this embodiment, the IPFAX process has been described as an example of the IP communication process, but the present invention is not limited to this form. The invention of the present application can also be applied to an IP phone. That is, in the above embodiment, the FAX apparatus 10 connected to both the PSTN 4 and the first IP network 8 is an example of a “communication apparatus”, but the “communication apparatus” is, for example, the PSTN 4 and the first IP network. It may be a telephone device connected to both of the networks 8. In this case, voice data communication using the PSTN 4 is an example of “general communication processing”, and voice data communication using the first IP network 8 is an example of “IP communication processing”.

  Acquisition of the IP address and SIP domain name of the SIP server 60 and storage in the memory 32 may be automatically performed by an arbitrary method. Therefore, for example, the DHCP server 70 may store the IP address and SIP domain name of the SIP server 60 in advance. In this case, for example, when the first acquisition unit 54 acquires DHCP information in S330 of FIG. 4, these pieces of information may be acquired simultaneously and stored in the memory 32.

  Further, the process of S410 in FIG. 5 may be omitted. In this case, after obtaining the DHCP information (S330), the determination unit 44 may execute the determinations of S412 and S414 without executing the determination of S410. In this modified example, after it is determined YES in S414 and the FAX apparatus 10 stores that IPFAX is in a usable state, the CPU 30 uses the information of option 120 included in the DHCP information acquired in S330 as SIP. What is necessary is just to memorize | store in the memory 32 as an IP address of the server 60. FIG. Note that if the DHCP information does not include option 120 information, the CPU 30 does not store the IP address of the SIP server 60 in the memory 32.

  In the above embodiment, when the IPFAX transmission process is executed, after the communication session is established between the FAX apparatus 10 and the FAX apparatus 110, the communication unit 40 transmits the FAX data to the FAX without relaying the SIP server 60. The data is transmitted to the device 110 (see S552 in FIG. 6). Instead, the communication unit 40 may transmit the FAX data to the FAX apparatus 110 via the SIP server 60 after a communication session is established between the FAX apparatus 10 and the FAX apparatus 110.

  Specific examples of the present invention have been described in detail above, but these are merely examples and do not limit the scope of the claims. The technology described in the claims includes various modifications and changes of the specific examples illustrated above.

  The technical elements described in this specification or the drawings exhibit technical usefulness alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. In addition, the technology illustrated in the present specification or the drawings achieves a plurality of objects at the same time, and has technical utility by achieving one of the objects.

  The first IP network 8 and the second IP network 95 are examples of IP networks. SIP URI is an example of IP identification information. The SIP server 60 is an example of a server. The IPFAX process is an example of an IP communication process. enterprise-number is an example of first identification information and second identification information. The enterprise-number table 35 is an example of a storage unit. The IP address of the SIP server 60 is an example of third identification information.

  The control unit that executes S108 is an example of a setting unit. The control unit that executes S410 is an example of a confirmation unit. The control unit that executes S414 is an example of a determination unit. The control unit that executes S218 is an example of a first notification unit. The control unit that executes S224 is an example of a second notification unit. The control unit that executes S330 is an example of a first acquisition unit. The control unit that executes S410 is an example of a second acquisition unit. The control unit that executes S312 is an example of a detection unit.

2: communication system, 4: PSTN, 6 and 90: LAN, 8: first IP network,
95: Second IP network, 10 and 110: FAX apparatus, 35: enterprise-number table, 60: SIP server, 70 and 94: DHCP server

Claims (7)

A communication apparatus belonging to a local communication network including a DHCP server and capable of connecting to a SIP server,
The SIP server can construct a specific IP network,
The SIP server is capable of controlling communication between a communication destination external device and the communication device by communication processing via the specific IP network,
The DHCP server is capable of storing first provider identification information indicating a provider providing an external communication network with which the communication device can communicate,
The DHCP server may provide the communication device with the DHCP information that is used for the communication device to perform various communications, and includes the first provider identification information. Is possible,
A setting unit for storing second provider identification information for identifying a provider of the specific IP network in a storage unit of the communication device;
An acquisition unit for acquiring the DHCP information from the DHCP server;
If the previous Quito the first provider identification information the acquired obtained in part in the DHCP information does not match with the second provider identification information stored in the storage means, the specific A first notification unit that notifies that communication processing via the IP network cannot be performed;
A communication apparatus comprising: The storage means can store a domain name of the SIP server,
When the first provider identification information matches the second provider identification information, the domain name stored in the storage unit and the communication destination external device identification information for identifying the communication destination external device The communication device further includes a communication control unit that generates SIP-URI information using the and uses the generated SIP-URI information to perform communication processing with the communication destination external device via the specific IP network. The communication apparatus according to claim 1.   The first notification unit, when the first provider identification information included in the DHCP information does not match the second provider identification information stored in the storage unit, The communication apparatus according to claim 1 or 2, wherein the communication apparatus notifies that there is a possibility that the communication apparatus is connected to an external communication network provided by a provider different from the provider of the IP network. Further comprising a setting unit for storing in the storage means communication setting information about whether or not communication processing via the specific IP network is executed by the communication device;
The first notification unit, when the first provider identification information included in the DHCP information does not match the second provider identification information stored in the storage unit, If the communication setting information stored in the message indicates that the communication process via the specific IP network is to be executed, the fact that the communication process via the specific IP network cannot be executed is notified. The communication apparatus according to any one of claims 1 to 3, wherein the communication apparatus is characterized in that:   Check whether it is communicable with the SIP server, and if it is not confirmed that it is communicable with the SIP server, a second notification that communication processing via the specific IP network cannot be performed The communication device according to claim 1, further comprising a notification unit. A communication apparatus program that belongs to a local communication network including a DHCP server and can be connected to a SIP server,
The SIP server can construct a specific IP network,
The SIP server is capable of controlling communication between a communication destination external device and the communication device by communication processing via the specific IP network,
The DHCP server is capable of storing first provider identification information indicating a provider providing an external communication network with which the communication device can communicate,
The DHCP server may provide the communication device with the DHCP information that is used for the communication device to perform various communications, and includes the first provider identification information. Is possible,
Setting means for storing second provider identification information for identifying a provider of the specific IP network in the storage means of the communication device;
Obtaining means for obtaining the DHCP information from the DHCP server;
If the previous Quito the first provider identification information the in the DHCP information acquired by the obtained unit does not match the second provider identification information stored in the storage means, the specific First notification means for notifying that communication processing via the IP network cannot be performed;
A program for a communication apparatus comprising: A method for controlling a communication apparatus that belongs to a local communication network including a DHCP server and can be connected to a SIP server,
The SIP server can construct a specific IP network,
The SIP server is capable of controlling communication between a communication destination external device and the communication device by communication processing via the specific IP network,
The DHCP server is capable of storing first provider identification information indicating a provider providing an external communication network with which the communication device can communicate,
The DHCP server may provide the communication device with the DHCP information that is used for the communication device to perform various communications, and includes the first provider identification information. Is possible,
Setting means for storing second provider identification information for identifying a provider of the specific IP network in the storage means of the communication device;
Obtaining means for obtaining the DHCP information from the DHCP server;
If the previous Quito the first provider identification information the in the DHCP information acquired by the obtained unit does not match the second provider identification information stored in the storage means, the specific First notification means for notifying that communication processing via the IP network cannot be performed;
A communication apparatus comprising:

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