JP2009017580A - Facsimile device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a facsimile device for performing stable facsimile communication even when it is connected to an IP telephone network. <P>SOLUTION: In facsimile transmission, the facsimile device turns off the V. 8 function of a modem section to perform a transmission operation, when a prescribed signal is detected after call origination. Thus, when detecting the prescribed signal originated by an ADSL modem or an IP terminal interposed between the IP telephone network and the facsimile device, the facsimile device determines that it is connected to the IP telephone network, and turns off the V. 8 function not to perform communication by V. 34, and thus the stable facsimile communication is performed even when the facsimile device is connected to the IP telephone network. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a facsimile apparatus, and more particularly to a facsimile apparatus that performs stable facsimile communication even when connected to an IP telephone network.

  ADSL (Asymmetric Digital Subscriber Line), FTTH (Fiber To The Home), broadband services using cable networks, etc. have become widespread, and along with that, IP (Internet Protocol) telephones that use the IP (Internet Protocol) network to send audio Is spreading.

The IP telephone uses a technology for realizing a voice call on an IP network called VoIP (Voice over IP). A communication protocol called H.323 is standard recommended by ITU-T. Further, another protocol called SIP (Session Initiation Protocol) is defined by IETF (Internet Engineering Task Force).

  An IP telephone has a lower communication cost than a telephone using a public line, and a conventional public line telephone can be used by using an IP telephone adapter.

  The IP telephone adapter is equipped with a VoIP function to realize a voice call using an IP network, and can be used by switching a telephone using a public line, which can be switched from a telephone (patent) Reference 1 and Patent Reference 2).

Utility Model Registration No. 3092983 JP 2000-41063 A

  However, there has been a problem that communication errors often occur when facsimile transmission is performed to a facsimile apparatus connected to the IP telephone network.

  That is, the facsimile apparatus uses a modem to send protocol signals and image information to V.264. 21, V.R. 8, V. 17, V. 34, V.R. Modulation / demodulation is performed in accordance with a standard such as 23, and DTMF transmission, tone detection, and voice message transmission are performed. For example, when communication is performed by connecting to an ADSL modem, when connected to an IP telephone network, various modems are connected. V. which is a procedure for properly connecting 8, a communication error often occurs due to packet loss or the like.

  On the other hand, when connecting to an IP telephone network, an ADSL modem or IP terminal is interposed. When these ADSL modems or IP terminals transmit to the IP telephone network, a special signal is transmitted to the source.

  Also, when transmitting, when a special signal from the ADSL modem or IP terminal recognizes that it is connected to the IP telephone network, a facsimile apparatus that sends a specific signal (for example, 800 Hz) after detecting polarity reversal. is there.

  Therefore, the present invention uses the signal sent from the ADSL modem or the IP terminal and the signal sent when the sending facsimile apparatus sends to the IP telephone network, and is it connected to the IP telephone network at the time of transmission and reception? It is an object of the present invention to provide a facsimile apparatus that performs processing for stabilizing facsimile communication when it is determined whether or not it is connected to an IP telephone network.

  Specifically, according to the first aspect of the present invention, when a predetermined signal is detected after the transmission at the time of facsimile transmission, the V.V. When a predetermined signal transmitted by an ADSL modem or IP terminal interposed between the IP telephone network and the facsimile apparatus is detected by performing the transmission operation with the 8 function turned off, it is determined that it is connected to the IP telephone network. , V. 8 Function off It is an object of the present invention to provide a facsimile apparatus which can perform stable facsimile communication even when connected to an IP telephone network so that communication at 34 is not performed.

  According to the second aspect of the present invention, when a predetermined signal is detected at the time of an incoming call, immediately after the reception of image information is started, the modem equalizer is frozen and a reception operation is performed. When a predetermined signal sent from the device is detected, it is determined that the device is connected to the IP telephone network, the equalizer inside the modem is frozen at the time of high-speed reception, the equalizer is not updated, and the packet is transmitted during facsimile communication on the IP telephone network. An object of the present invention is to provide a facsimile apparatus that performs stable facsimile communication even if there is a loss.

  According to the third aspect of the present invention, if a predetermined signal is detected at the time of an incoming call when switching from high-speed reception to low-speed reception when a line-to-line / inter-frame time-out occurs during facsimile communication, When a predetermined signal transmitted from the transmitting facsimile apparatus is detected when the IP telephone network is used by performing a reception operation by extending the high-speed reception state duration until switching to low-speed reception, it is assumed that the IP telephone network is connected. Judgment is made to extend the high-speed reception state duration by a predetermined time so that even if reception fails during high-speed reception, it can be restored to high-speed reception again, and facsimile reception from a facsimile machine connected to the IP telephone network Even in such a case, an object is to provide a facsimile apparatus that performs stable facsimile communication.

  According to a fourth aspect of the present invention, when a post message is not received during a predetermined post message waiting time in a low-speed reception state during facsimile communication, a post signal is detected when a predetermined signal is detected at the time of reception when processing as a communication error. By performing the reception operation by extending the message waiting time for a predetermined time, when a predetermined signal transmitted from the transmitting facsimile apparatus is detected when using the IP telephone network, it is determined that the message is connected to the IP telephone network, and the post message waiting time is determined. Even if the high-speed reception fails and the high-speed reception cannot be restored, the low-speed signal can be captured and the communication can be started again. From the facsimile machine connected to the IP telephone network, The purpose is to provide a facsimile apparatus that performs stable facsimile communication even in the case of facsimile reception. To have.

  According to the fifth aspect of the present invention, when a line-to-line / inter-frame timeout occurs, the high-speed reception is switched to the low-speed reception, and if a post message is not received during a predetermined post message waiting time in the low-speed reception state, When a predetermined signal is detected at the time of an incoming call, the high-speed reception state continuation time from switching from high-speed reception at the time of line-to-line / inter-frame timeout to low-speed reception is extended by a predetermined time, and the post message waiting time is extended by a predetermined time. When a predetermined signal transmitted from the transmitting facsimile apparatus is detected when the IP telephone network is used by performing the receiving operation, it is determined that the terminal is connected to the IP telephone network, the high-speed reception state duration time is extended by a predetermined time, and the post Even if the message waiting time is extended for a predetermined time and reception fails during high-speed reception It was possible to return to high-speed reception, and even if high-speed reception failed and could not return to high-speed reception, it was possible to capture a low-speed signal and start communication again, and connected to the IP telephone network. An object of the present invention is to provide a facsimile apparatus that performs stable facsimile communication even when receiving a facsimile from a facsimile apparatus.

  The facsimile apparatus according to the first aspect of the present invention is connected to a public line network and has a tone detection function. When a predetermined signal is detected after transmission in a facsimile apparatus having a modem having 8 functions and performing facsimile communication, the V. The above object is achieved by performing transmission operation with 8 functions off.

  According to a second aspect of the present invention, there is provided a facsimile apparatus that is connected to a public line network, has a tone detection function, and has a modem that sets an equalizer according to the line status. When the signal is detected, immediately after starting the reception of the image information, the above-mentioned object is achieved by performing the reception operation by freezing the equalizer of the modem.

  According to a third aspect of the present invention, there is provided a facsimile apparatus connected to a public line network, having a tone detection function, a high-speed reception function and a low-speed reception function. In a facsimile apparatus that switches from low-speed reception to a low-speed reception, when a predetermined signal is detected at the time of an incoming call, the reception operation is performed by extending the high-speed reception state continuation time from the high-speed reception to the low-speed reception during the interline / interframe timeout. The above-mentioned purpose is achieved by performing.

  According to a fourth aspect of the present invention, a facsimile apparatus is connected to a public network and has a tone detection function, a high-speed reception function and a low-speed reception function, and a predetermined post message waiting time in a low-speed reception state during facsimile communication. If a post signal is not received during this period, a facsimile apparatus that processes as a communication error will detect the predetermined signal at the time of an incoming call, and extend the post message waiting time for a predetermined time to perform the receiving operation. Have achieved.

  The facsimile apparatus according to the present invention is connected to a public network and has a tone detection function, a high-speed reception function and a low-speed reception function, and changes from high-speed reception to low-speed reception when a line-to-line / inter-frame time-out occurs. If a post signal is not received during a predetermined post message waiting time during switching and low-speed reception, a facsimile apparatus that processes as a communication error detects a predetermined signal at the time of an incoming call. The above object is achieved by extending the high-speed reception state continuation time from switching from high-speed reception to low-speed reception by a predetermined time and performing the reception operation by extending the post message waiting time by a predetermined time.

  According to the facsimile apparatus of the first aspect of the present invention, when a predetermined signal is detected after the transmission at the time of facsimile transmission, the V.V. Since the transmission operation is performed with the 8 function turned off, when a predetermined signal transmitted by the ADSL modem or IP terminal interposed between the IP telephone network and the facsimile apparatus is detected, it is determined that the connection is made to the IP telephone network. V. 8 Function off Therefore, even when connected to the IP telephone network, stable facsimile communication can be performed.

  According to the facsimile apparatus of the second aspect of the present invention, when a predetermined signal is detected at the time of an incoming call, immediately after the reception of image information is started, the modem equalizer is frozen and the reception operation is performed. Sometimes when a predetermined signal sent from the transmitting facsimile apparatus is detected, it can be determined that it is connected to the IP telephone network, and the equalizer inside the modem can be frozen at the time of high-speed reception so that the equalizer is not updated. Stable facsimile communication can be performed even if packet loss occurs during facsimile communication on the telephone network.

  According to the facsimile apparatus of the third aspect of the present invention, when a timeout occurs between lines / interframes during facsimile communication, a time-out between lines / interframes is detected when a predetermined signal is detected upon arrival when switching from high speed reception to low speed reception. The high-speed reception state continuation time from the high-speed reception to the low-speed reception is extended for a predetermined time to perform the reception operation. Therefore, when a predetermined signal transmitted from the transmitting facsimile apparatus is detected when the IP telephone network is used, the IP telephone network The high-speed reception state duration can be extended by a predetermined time so that even if reception fails during high-speed reception, it can be restored to high-speed reception again, and connected to the IP telephone network. Even in the case of facsimile reception from a facsimile apparatus, stable facsimile communication can be performed.

  According to the facsimile apparatus of the present invention, if a post message is not received during a predetermined post message waiting time in a low-speed reception state during facsimile communication, a predetermined signal is generated at the time of an incoming call when processing as a communication error. Is detected, the post message waiting time is extended for a predetermined time, and the receiving operation is performed. Therefore, when a predetermined signal transmitted from the transmitting facsimile apparatus is detected when the IP telephone network is used, it is determined that it is connected to the IP telephone network. Even if the post message waiting time is extended by a predetermined time, high-speed reception fails and high-speed reception cannot be restored, a low-speed signal can be captured and communication can be performed again, and a facsimile machine connected to the IP telephone network Even in the case of facsimile reception from the mobile phone, stable facsimile communication can be performed.

  According to the facsimile apparatus of the fifth aspect of the present invention, when line-to-line / inter-frame time-out occurs, switching from high-speed reception to low-speed reception and if no post-message is received within a predetermined post-message waiting time in the low-speed reception state, communication is performed. When processing as an error, if a predetermined signal is detected at the time of an incoming call, the high-speed reception state continuation time until switching from high-speed reception during line-to-line / inter-frame timeout to low-speed reception is extended by a predetermined time, and the post message waiting time is increased. Since the receiving operation is performed after a predetermined time extension, if a predetermined signal sent from the transmitting facsimile apparatus is detected when the IP telephone network is used, it is determined that the terminal is connected to the IP telephone network and the high-speed reception state duration is extended by a predetermined time. In addition, the post message waiting time is extended by a predetermined time, during high-speed reception. Even if reception fails, you can return to high-speed reception again, and even if high-speed reception fails and you cannot return to high-speed reception, you can capture low-speed signals and start communication again. Even in the case of facsimile reception from a facsimile apparatus connected to the IP telephone network, stable facsimile communication can be performed.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, since the Example described below is a suitable Example of this invention, various technically preferable restrictions are attached | subjected, However, The scope of the present invention limits this invention especially in the following description. As long as there is no description of the effect, it is not restricted to these aspects.

  1 and 2 are diagrams showing a first embodiment of a facsimile apparatus of the present invention, and FIG. 1 is a block diagram of a facsimile apparatus 1 to which the first embodiment of the facsimile apparatus of the present invention is applied.

  In FIG. 1, a facsimile apparatus 1 includes a system control unit 2, a system memory unit 3, an image memory unit 4, an encoding / decoding unit 5, a recording unit 6, a reading unit 7, an operation unit 8, and an I / O control unit 9. , A modem unit 10, a communication analog unit 11, an NCU (Network Control Unit) unit 12, and the like, and main units are connected by a bus 13.

  The system memory unit 3 is composed of a ROM (Read Only Memory), a RAM (Random Access Memory), etc., and the control program of the facsimile apparatus 1, various data necessary for executing the control program, the frequency of the specified signal, and the frequency of the specified signal Stores On / Off (on / off) time, number of repetitions, various waiting times, and the like.

  The system control unit 2 controls each unit of the facsimile apparatus 1 based on a control program in the system memory unit 3 and executes basic control processing as the facsimile apparatus 1 and also executes communication management processing described later.

  The image memory unit 4 is composed of, for example, a large-capacity RAM or a hard disk device, and mainly stores communication information such as image information for transmission and received image information, and is read at a predetermined time for transmission processing. And recording processing is performed.

  The encoding / decoding unit 5 is for increasing the efficiency of storing image information in the image memory unit 4 and shortening the transmission time. The encoding / decoding unit 5 encodes image information according to a predetermined encoding method, Decode the encoded image information.

  The recording unit 6 uses, for example, an ink jet recording device or an electrophotographic recording device, and records and outputs the received image information and the image information of the original read by the reading unit 7 on a recording sheet.

  For example, an image scanner using a CCD (Charge Coupled Device) or the like is used as the reading unit 7 and generally includes an ADF (automatic document feeder). A plurality of originals are set in the ADF, and the ADF feeds the set originals one by one to the original reading position of the reading unit 7. The reading unit 7 scans a document conveyed from the ADF and reads an image of the document with a predetermined resolution.

  The operation unit 8 includes various operation keys such as a numeric keypad, a start key, a one-touch key, an abbreviated dial key, and a function key, and also includes a display, for example, a liquid crystal display. An instruction is entered. On the display of the operation unit 8, various command contents inputted from the operation keys and various information notified from the facsimile apparatus 1 to the operator are displayed.

  The I / O control unit 9 is connected to the communication analog unit 11 and the NCU unit 12 and performs handshake with the system control unit 2 to control the communication analog unit 11 and the NCU unit 12.

  The modem unit 10 operates under the control of the system control unit 2 to send protocol signals and image information to V.P. 21, V.R. 8, V. 17, V. 34, V.I. Modulation / demodulation is performed according to a standard such as 23, and DTMF transmission, tone detection, and voice message transmission are performed. The modem unit 10 has a built-in equalizer, and has a function of setting the equalizer according to the line status, and freeing the equalizer to prohibit the updating of the equalizer.

  That is, the modem unit 10 has a low-speed modem function (V.21) for exchanging electric transmission procedure signals with the counterpart facsimile machine and a high-speed modem function (V.34 modem, V.29 modem) mainly for exchanging image data. V.27ter modem, etc.).

  The communication analog unit 11 is connected to the NCU unit 12 and operates as an analog signal path.

  The NCU unit 12 is connected to a predetermined line, for example, a PSTN (Public Swiched Telephone Network), and the NCU unit 12 is an interface with the line and detects off-hook and transmits dial pulses. And automatically makes an incoming call in response to a call from the line, and performs automatic call processing to the line. The NCU unit 12 has a built-in communication control unit. The communication control unit exchanges a facsimile control signal with the counterpart facsimile machine to execute a facsimile communication procedure.

  Further, an external telephone 20 is connected to the NCU unit 12, and the NCU unit 12 switches and connects the line between the main body side of the facsimile apparatus 1 and the external telephone 20 side.

  Next, the operation of this embodiment will be described. When the facsimile apparatus 1 of the present embodiment detects a prescribed signal after transmission at the time of transmission, the V.V. Eight functions are turned off and stable communication is performed.

  That is, as shown in FIG. 2, when the system control unit 2 starts outgoing (step S101), the facsimile apparatus 1 checks whether a special signal (regulated signal) is received and is connected via the IP telephone network. Or whether it is connected through a general public network (step S102).

  That is, when the facsimile apparatus 1 is connected to the IP telephone network, an ADSL modem or an IP terminal is interposed between the IP telephone network and the facsimile apparatus 1. A lamp is attached, and the user can confirm whether the current communication is performed via the general public network or the IP telephone network by turning on, blinking, or turning off the lamp. In addition, by sending a special signal to the user after making a call, it is possible to confirm whether or not the connection is established through the IP telephone network with sound.

  Therefore, the facsimile apparatus 1 according to the present embodiment determines whether it is connected to the IP telephone network or the general public network depending on whether or not this special signal is detected.

When the system control unit 2 receives the special signal in step S102, the system control unit 2 determines that it is connected to the IP telephone network. 8 function is set to OFF (step S103), the transmission operation is performed, and the modem unit 10 is set to V.V. 34, the transmission process is terminated (step S105). When the transmission is completed, the transmission process is terminated (step S105).

  As described above, when the facsimile apparatus 1 according to the present embodiment detects a predetermined signal after the transmission during facsimile transmission, the facsimile apparatus 1 of the modem. The transmission operation is performed with 8 functions off.

Therefore, when a predetermined signal transmitted from the ADSL modem or IP terminal interposed between the IP telephone network and the facsimile apparatus is detected, it is determined that the connection is made to the IP telephone network. 8 Function off Therefore, even when connected to the IP telephone network, stable facsimile communication can be performed.

  FIG. 3 is a flowchart showing communication management processing by the facsimile apparatus to which the second embodiment of the facsimile apparatus of the present invention is applied.

  The present embodiment is applied to a facsimile apparatus similar to the facsimile apparatus 1 of the first embodiment. In the description of the present embodiment, the description of the first embodiment is used as necessary. The description will be made using the reference numerals as they are.

  The facsimile apparatus 1 according to the present embodiment is a receiving side, and when a specific signal is received after detecting a call signal, the facsimile apparatus 1 determines that it is connected to the IP telephone network and freezes the equalizer of the modem unit 10. Receive.

  That is, as a facsimile apparatus, when a prescribed signal indicating an IP telephone network is detected after transmission, a facsimile apparatus that transmits a specific signal indicating that transmission is performed on the IP telephone network after detecting polarity inversion There is.

  Therefore, the facsimile apparatus 1 of the present embodiment receives a facsimile from such a facsimile apparatus and, after detecting a call signal, indicates that the facsimile apparatus 1 is transmitting on the IP telephone network from the transmitting facsimile apparatus. When the signal is received, it is determined that it is connected to the IP telephone network, and reception is performed by freezing the equalizer of the modem unit 10.

  Specifically, as shown in FIG. 3, the facsimile apparatus 1 checks whether a special signal (specific signal) is detected when the system control unit 2 receives a call and starts sending (step S201). Then, it is checked whether it is connected to the IP telephone network or the general public network (step S202).

  When the special signal is detected in step S202, the system control unit 2 determines that it is connected to the IP telephone network, sets the IP flag (step S203), and starts the reception operation (step S204). If no special signal is detected in step S202, it is determined that the connection is made to the general public network, and the reception operation is started without setting the IP flag (step S204).

  When starting the reception operation, the system control unit 2 receives high-speed image information (step S205), checks whether the IP flag is on (step S206), and if the IP flag is on, the modem unit 10 The equalizer is frozen (step S207), reception is performed, and when the reception of one page is completed, the equalizer freeze is released (step S208).

  Next, the system control unit 2 checks whether there is a next page (step S209). If there is a next page, the system control unit 2 returns to step S205 and performs the same processing as above (steps S205 to S209).

  If there is no next page in step S209, the system control unit 2 completes reception and ends the reception process (step S210).

  In step S206, when the IP flag is not on, it is connected to the general public network, not the IP telephone network, so the equalizer of the modem unit 10 is not frozen, and the equalizer of the modem unit 10 is matched to the line status. When reception of one page is completed, it is checked whether or not there is a next page (step S209). If there is a next page, the process returns to step S205 to perform the same processing as above (step S205 to step S205). S209).

  If there is no next page in step S209, the system control unit 2 completes reception and ends the reception process (step S210).

  That is, in the facsimile apparatus 1 of the present embodiment, when connected to the general public network, the equalizer of the modem unit 10 is updated according to the line condition without freezing the equalizer of the modem unit 10. Since packet loss is likely to occur when connected to a network, the equalizer is fixed to prevent the equalizer from following a sudden change in the line, thereby ensuring stable communication.

  As described above, when the facsimile apparatus 1 according to the present embodiment detects a predetermined signal at the time of an incoming call, immediately after the reception of the image information is started, the equalizer of the modem unit 10 is frozen to perform the receiving operation.

  Therefore, when a predetermined signal transmitted from the transmitting facsimile apparatus is detected when the IP telephone network is used, it is determined that it is connected to the IP telephone network, and the equalizer built in the modem unit 10 is frozen at the time of high-speed reception to update the equalizer. Therefore, stable facsimile communication can be performed even if packet loss occurs during facsimile communication on the IP telephone network.

  FIG. 4 is a flowchart showing communication management processing by the facsimile apparatus to which the third embodiment of the facsimile apparatus of the present invention is applied.

The present embodiment is applied to a facsimile apparatus similar to the facsimile apparatus 1 of the first embodiment. In the description of the present embodiment, the description of the first embodiment is used as necessary. The description will be made using the reference numerals as they are.

  The facsimile apparatus 1 according to the present embodiment is a receiving side. When a specific signal is received after detecting a call signal, the facsimile apparatus 1 determines that it is connected to the IP telephone network, and determines a high-speed waiting time (continuous high-speed reception state). Adjust the (time).

  That is, as a facsimile apparatus, when a prescribed signal indicating an IP telephone network is detected after transmission, a facsimile apparatus that transmits a specific signal indicating that transmission is performed on the IP telephone network after detecting polarity inversion There is.

  Therefore, the facsimile apparatus 1 according to the present embodiment receives a facsimile from such a facsimile apparatus. When the facsimile apparatus 1 detects a call signal and receives a specific signal from the transmitting facsimile apparatus, the facsimile apparatus 1 is connected to the IP telephone network. Therefore, the modem unit 10 performs reception by adjusting the high-speed waiting time at the time of timeout between lines / interframes.

  Specifically, as shown in FIG. 4, the facsimile apparatus 1 checks whether the system control unit 2 detects a special signal (specific signal) when an incoming call is received and transmission is started (step S301). Then, it is checked whether it is connected to the IP telephone network or to the general public network (step S302).

  When the special signal is detected in step S302, the system control unit 2 determines that it is connected to the IP telephone network, sets the IP flag (step S303), and starts the reception operation (step S304). If no special signal is detected in step S302, it is determined that the connection is made to the general public network, and the reception operation is started without setting the IP flag (step S304).

  When the reception operation is started, the system control unit 2 checks whether an interline / interframe timeout has occurred (step S305). If the interline / interframe timeout has occurred, the IP flag is turned on, that is, connected to the IP telephone network. Is checked (step S306).

  In step S306, when the IP flag is on, the system control unit 2 determines that it is connected to the IP telephone network, and sets the high-speed waiting time (high-speed reception state duration) to 30 seconds (30 s). (Step S307) It is checked whether the high-speed waiting time is time-out (Step S308). If the high-speed waiting time is not time-out, it is checked whether the high-speed reception is performed (Step S309).

  In step S309, when the high-speed reception is performed, the system control unit 2 returns to step S305 and performs the same processing as described above (steps S305 to S309).

  If it is determined in step S305 that there is no interline / interframe time-out, the system control unit 2 proceeds to step S308 and checks whether a high-speed waiting time out (step S308). Check (step S309).

  If it is determined in step S309 that the high-speed reception is not performed, the system control unit 2 returns to step S308 to check whether the high-speed waiting time has timed out (step S308).

  If the high-speed waiting time has timed out in step S308, the system control unit 2 shifts to the low-speed mode, and if the high-speed waiting time is set to 30 seconds in step S307, the high-speed waiting time Is set back to normal 0 seconds (0 s) (step S310), and it is checked whether there is a next page (step S311).

  If there is a next page in step S311, the system control unit 2 returns to step S305 and performs the same processing as above (steps S305 to S311). If there is no next page, the reception is completed and the reception processing is performed. The process ends (step S312).

  As described above, when the facsimile apparatus 1 of this embodiment times out between lines / interframes during facsimile communication, when switching from high speed reception to low speed reception and detecting a predetermined signal upon arrival, the interline / interframe timeout occurs. The high-speed waiting time (high-speed reception state duration) until switching from high-speed reception to low-speed reception is extended by a predetermined time to perform the reception operation.

  Therefore, when a predetermined signal sent from the transmitting facsimile apparatus is detected when using the IP telephone network, it is determined that the terminal is connected to the IP telephone network, and the high-speed waiting time is extended by a predetermined time, and reception fails during high-speed reception. Even in this case, it is possible to return to high-speed reception again, and stable facsimile communication can be performed even in the case of facsimile reception from a facsimile apparatus connected to the IP telephone network.

  FIG. 5 is a flowchart showing communication management processing by the facsimile apparatus to which the fourth embodiment of the facsimile apparatus of the present invention is applied.

  The present embodiment is applied to a facsimile apparatus similar to the facsimile apparatus 1 of the first embodiment. In the description of the present embodiment, the description of the first embodiment is used as necessary. The description will be made using the reference numerals as they are.

  The facsimile apparatus 1 according to the present embodiment is a receiving side. When a specific signal is received after detecting a call signal, the facsimile apparatus 1 determines that it is connected to the IP telephone network, and determines a high-speed waiting time (continuous high-speed reception state). Time) and post message waiting time are adjusted.

  That is, as a facsimile apparatus, when a prescribed signal indicating an IP telephone network is detected after transmission, a facsimile apparatus that transmits a specific signal indicating that transmission is performed on the IP telephone network after detecting polarity inversion There is.

  Therefore, the facsimile apparatus 1 according to the present embodiment receives a facsimile from such a facsimile apparatus. When the facsimile apparatus 1 detects a call signal and receives a specific signal from the transmitting facsimile apparatus, the facsimile apparatus 1 is connected to the IP telephone network. Therefore, the high-speed waiting time and the post message waiting time at the time of time-out between lines / frames of the modem unit 10 are adjusted and reception is performed.

  Specifically, as shown in FIG. 5, the facsimile apparatus 1 checks whether a special signal (specific signal) is detected when the system control unit 2 receives a call and starts sending (step S401). Then, it is checked whether it is connected to the IP telephone network or the general public network (step S402).

  When the special signal is detected in step S402, the system control unit 2 determines that it is connected to the IP telephone network, sets the IP flag (step S403), and starts the reception operation (step S404). If no special signal is detected in step S402, it is determined that the connection is made to the general public network, and the reception operation is started without setting the IP flag (step S404).

  When the reception operation is started, the system control unit 2 checks whether the inter-line / inter-frame time-out has occurred (step S405). If the inter-line / inter-frame time-out occurs, the IP flag is turned on, that is, connected to the IP telephone network. Is checked (step S406).

  In step S406, when the IP flag is on, the system control unit 2 determines that it is connected to the IP telephone network, sets the high-speed waiting time to 30 seconds (30s) (step S407), and waits for high-speed waiting. It is checked whether the time is time-out (step S408). If the high-speed waiting time is not time-out, it is checked whether it is high-speed reception (step S409).

  In step S409, when the reception is at high speed, the system control unit 2 returns to step S405 and performs the same processing as above (steps S405 to S409).

  If it is determined in step S405 that there is no interline / interframe time-out, the system control unit 2 proceeds to step S408 to check whether the high-speed waiting time has timed out (step S408). Check (step S409).

  If it is determined in step S409 that the high-speed reception is not performed, the system control unit 2 returns to step S408 and checks whether the high-speed waiting time has timed out (step S408).

  If the high-speed waiting time has timed out in step S408, the system control unit 2 shifts to the low-speed mode, and if the high-speed waiting time is set to 30 seconds in step S407, the high-speed waiting time Is set back to normal 0 seconds (0 s) (step S410), and it is checked whether the IP flag is on, that is, connected to the IP telephone network (step S411).

  If the IP flag is on in step S411, the system control unit 2 determines that the IP telephone network is connected, and sets the low-speed waiting time, which is a post message waiting time, to 30 seconds (30 s). (Step S412), check whether the post message is received before the low-speed waiting time has timed out (Steps S413 and S414), and if the post message is received before the low-speed waiting time has timed out, check whether there is a next page. (Step S415).

  If there is a next page in step S415, the system control unit 2 returns to step S405, performs the same processing as above (steps S405 to S415), and if there is no next page in step S415, completes reception. As the low-speed waiting time, the ECM is set to 18 seconds (18 s) and the non-ECM is set to 6 seconds (6 s), and the reception process is terminated (step S416).

  In step S414, if the low-speed waiting time has timed out without receiving the post message, the system control unit 2 completes reception as a communication error (step S417), and sets the ECM to 18 seconds as the low-speed waiting time. In (18s), the non-ECM is set to 6 seconds (6s), and the reception process is terminated (step S416).

  That is, in a line such as an IP telephone network where packet loss is likely to occur, reception often fails during high-speed reception, and it is often impossible to return to high-speed reception again. In this case, the low-speed signal reception wait state is entered, but the transmission side does not send out the low-speed signal unless it finishes transmitting image information for one block in the case of ECM, and in the case of non-ECM. If one page is long in non-ECM, the reception waiting may be stopped before receiving a post message, resulting in a communication error. Therefore, the facsimile apparatus 1 according to the present embodiment extends the low-speed waiting time to extend the post-message waiting time. Even if the high-speed reception fails and the high-speed reception cannot be restored, the low-speed signal is output. It is possible to catch and re-communication again.

  As described above, when the facsimile apparatus 1 according to the present embodiment does not receive a post message within a predetermined post message waiting time in a low-speed reception state during facsimile communication, a predetermined signal is generated at the time of reception when processing as a communication error. Is detected, the post message waiting time is extended by a predetermined time to perform the receiving operation.

  Therefore, when a predetermined signal sent from the transmitting facsimile apparatus is detected when the IP telephone network is used, it is determined that the terminal is connected to the IP telephone network, the post message waiting time is extended by a predetermined time, high-speed reception fails, and high speed Even if it cannot return to reception, it can capture a low-speed signal and start communication again, and can perform stable facsimile communication even when receiving a facsimile from a facsimile machine connected to the IP telephone network. .

  The facsimile apparatus 1 of this embodiment switches from high-speed reception to low-speed reception when a line-to-line / inter-frame time-out occurs, and if a post message is not received during a predetermined post-message waiting time in a low-speed reception state, a communication error occurs. During processing, when a predetermined signal is detected at the time of an incoming call, the high-speed reception state continuation time until switching from high-speed reception during line-to-line / inter-frame timeout to low-speed reception is extended by a predetermined time, and the post message waiting time is set to a predetermined time. The reception operation is extended.

  Therefore, when a predetermined signal sent from the transmitting facsimile apparatus is detected when the IP telephone network is used, it is determined that the terminal is connected to the IP telephone network, and the high-speed reception state duration time is extended by a predetermined time and the post message waiting time is set to a predetermined value. It is possible to extend the time so that even if reception fails during high-speed reception, it can be restored to high-speed reception again. Even if high-speed reception fails and high-speed reception cannot be restored, a low-speed signal can be obtained. Communication can be performed again, and stable facsimile communication can be performed even in the case of facsimile reception from a facsimile apparatus connected to the IP telephone network.

  The invention made by the present inventor has been specifically described based on the preferred embodiments. However, the present invention is not limited to the above, and various modifications can be made without departing from the scope of the invention. Needless to say.

  Even when connected to an IP telephone network, the present invention can be applied to a facsimile apparatus that performs stable facsimile communication.

1 is a schematic block diagram of a facsimile apparatus to which a first embodiment of a facsimile apparatus of the present invention is applied. 2 is a flowchart showing communication management processing by the facsimile apparatus of FIG. 9 is a flowchart showing communication management processing by a facsimile apparatus to which a second embodiment of the facsimile apparatus of the present invention is applied. 9 is a flowchart showing communication management processing by a facsimile apparatus to which a third embodiment of the facsimile apparatus of the present invention is applied. 10 is a flowchart showing communication management processing by a facsimile apparatus to which a fourth embodiment of the facsimile apparatus of the present invention is applied.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Facsimile device 2 System control part 3 System memory part 4 Image memory part 5 Encoding / decoding part 6 Recording part 7 Reading part 8 Operation part 9 I / O control part 10 Modem part 11 Communication analog part 12 NCU part 13 Bus

Claims (5)

  It is connected to the public network and has a tone detection function. When a predetermined signal is detected after transmission in a facsimile apparatus having a modem having 8 functions and performing facsimile communication, the V. 8. A facsimile apparatus characterized in that a transmission operation is performed with 8 functions turned off.   Connected to the public line network, equipped with a tone detection function, and equipped with a modem that sets an equalizer according to the line status. In a facsimile machine that performs facsimile communication, reception of image information is started when a predetermined signal is detected upon arrival. A facsimile apparatus characterized in that immediately after the operation, the equalizer of the modem is frozen to perform a receiving operation.   Connected to the public network, has a tone detection function, a high-speed reception function, and a low-speed reception function. When the predetermined signal is detected, the facsimile apparatus performs a receiving operation by extending a high-speed reception state continuation time from the high-speed reception at the time of timeout between the lines / frames to the low-speed reception for a predetermined time.   It is connected to the public network, has tone detection function, and has high-speed reception function and low-speed reception function, and if it does not receive a post message during a predetermined post-message waiting time in the low-speed reception state during facsimile communication, it communicates A facsimile apparatus for processing as an error, wherein when a predetermined signal is detected at the time of an incoming call, the post message waiting time is extended by a predetermined time to perform a reception operation.   Connected to the public line network, equipped with tone detection function, high-speed reception function and low-speed reception function, and when line-to-line / inter-frame time-out occurs, switching from high-speed reception to low-speed reception and waiting for a predetermined post message in the low-speed reception state If a predetermined signal is detected at the time of an incoming call in a facsimile apparatus that does not receive a post message during the time, a high-speed reception until switching from high-speed reception at the time of timeout between the lines or between frames to low-speed reception is detected. A facsimile apparatus characterized by extending a state continuation time by a predetermined time and performing a receiving operation by extending the post message waiting time by a predetermined time.

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