JP4047751B2 - COMMUNICATION DEVICE, COMMUNICATION METHOD, AND COMPUTER-READABLE RECORDING MEDIUM CONTAINING PROGRAM FOR EXECUTING THE METHOD - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a communication apparatus, a communication method, and a computer-readable recording medium storing a program for executing the method, and more particularly to a communication method for performing G3 facsimile communication.
[0002]
[Prior art]
[Patent Document 1]
In G3 facsimile communication via a public line network, when communication is performed via a VoIP (Voice over IP) network or a device such as TDM, a response on transmission control is delayed, In some cases, communication may not succeed due to a phase hit or the like due to data loss on the network. Therefore, in the network facsimile directly connected to the IP network, the above-mentioned Patent Document 1 proposes a solution for the transmission delay. Specifically, the waiting time until the signal is transmitted after receiving the signal from the partner device and the waiting time until the signal is received after transmitting the signal to the partner device are recommended by the partner device. T.A. 38 is a packet network direct connection type network facsimile apparatus conforming to the standard 38, the first waiting time is set, and the destination apparatus is set to ITU-T recommendation T.36. If it is not a 38 network packet network direct connection type network facsimile apparatus, a second waiting time longer than the first waiting time is set.
[0003]
[Problems to be solved by the invention]
However, in the above-mentioned patent document 1, it is not applicable to a normal G3 facsimile apparatus, and information loss or the like occurs in the network when communication is performed via a VoIP network, a TDM, or the like in the G3 facsimile apparatus. As a result, a phase hit or the like occurs in the modem signal and the high-speed modem diverges.
[0004]
The present invention is intended to solve these problems, and in accordance with the form of the communication network in which the communication device is installed, the modem can be operated properly and communication considering delay can be performed. It is an object of the present invention to provide a communication apparatus, a communication method, and a computer-readable recording medium storing a program for executing the method.
[0005]
[Means for Solving the Problems]
In order to solve the above problems, the communication apparatus of the present invention allows a user to set a communication network that performs signal conversion other than a public telephone exchange network such as a VoIP network or a TDM. have a communication control unit communication network signal conversion in other public switched telephone network, such as VoIP networks and TDM is performed to notify the calling party during call response to the effect mediated, communication control unit, non-standard from the receiver side When the function identification signal is analyzed, and the result of the analysis indicates that a communication network for performing signal conversion other than the public telephone switching network such as the VoIP network or TDM is set, the response waiting timer is set. It is characterized by changing the setting value . Therefore, it is possible to perform communication in consideration of delay according to the form of the communication network in which the communication device is installed, operate the modem properly, and ensure communication quality.
[0009]
In addition, according to the communication method of the present invention as another invention, the user is allowed to set so that a communication network that performs signal conversion other than a public telephone exchange network such as a VoIP network or TDM is interposed, When a call is made, the called party is notified that a communication network that performs signal conversion other than a public telephone exchange network such as a VoIP network or TDM is present. In the communication method of the present invention, a non-standard function identification signal from the incoming side is analyzed, and as a result of the analysis, a communication network in which the incoming side is subjected to signal conversion other than a public telephone exchange network such as a VoIP network or TDM is interposed. When the effect is set, the timer setting value of the response waiting timer is changed. Therefore, it is possible to perform communication in consideration of delay according to the form of the communication network in which the communication device is installed, operate the modem properly, and ensure communication quality.
[0013]
Furthermore, another invention, the computer is characterized by a computer-readable recording medium which stores a program order to execute the communication method described above. Therefore, a general-purpose communication system can be constructed without changing an existing system.
[0014]
According to the communication method of the present invention, a setting that a communication network that performs signal conversion other than a public telephone exchange network such as a VoIP network or TDM is interposed is allowed to the user, and is notified to the calling side when an incoming call is answered. To do. Then, the non-standard function identification signal from the incoming side is analyzed, and as a result of the analysis, a setting is made such that the incoming side has a communication network in which signal conversion other than the public telephone exchange network such as the VoIP network or TDM is performed. When changing the timer setting of the response waiting timer.
[0015]
【Example】
FIG. 1 is a block diagram showing a configuration of a communication apparatus according to an embodiment of the present invention. In the figure, a communication apparatus 100 according to the present embodiment includes a reading unit 101, a recording unit 102, an encoding / decoding unit 103, a system control unit 104, a system memory 105, an image information memory 106, an operation display unit 107, and a communication control unit. The components are connected to each other via a system bus 111. In addition, a modem 109 and a SW unit 110 are connected to the communication control unit 108. The reading unit 101 reads a document, and the recording unit 102 records received image information, a report, and the like. The encoding / decoding unit 103 encodes / decodes image information. The system control unit 104 controls the entire system. Furthermore, the system memory 105 is a non-volatile memory used for system control. The image information memory 106 stores and saves image information as necessary. The operation display unit 107 is provided with a key, an LED, an LCD, and the like to allow a user input operation. The communication control unit 108 controls transmission, and the modem 109 modulates / demodulates analog signals between the line and the communication control unit. Further, the SW unit 110 has a physical I / F with the line, and switches the line connection between the telephone side and the communication apparatus side.
[0016]
Next, the operation of the communication apparatus of the present embodiment having the configuration as shown in FIG. 1 will be described with reference to FIG. 2 showing a communication sequence.
First, the operation display unit 107 in FIG. 1 is allowed to set in advance that both the transmitter and the receiver are connected to an environment in which a conversion network such as VoIP is interposed (hereinafter referred to as VoIP mode). This information is stored in the system memory 105 of FIG. First, after making a call (phase F1), the communication control unit 108 of the transmitter receives a CED (called station identification signal) from the receiver (phase F2), and then continues to NSF (non-standard function identification signal) / DIS ( (Digital identification signal) is received (phase F3). When the communication control unit 108 of FIG. 1 of the receiver is set to the VoIP mode, the communication control unit 108 displays that fact on the NSF. The transmitter analyzes the NSF from the receiver so that the response waiting timer T4 is changed from 3 seconds to 4.5 seconds when the receiver is in the VoIP mode or the own device is in the VoIP mode. Change the timer set value. In addition, when the communication control unit 109 of the transmitter is set to the VoIP mode, the NSS (non-standard function setting signal) is displayed to that effect, and the NSS is transmitted to the receiver (phase F4). TCF (training check signal) is transmitted. When the VoIP mode is displayed on the received NSS, the receiver changes the response waiting timer T4 from 3 seconds to 4.5 seconds. Further, the modem 109 in FIG. 1 is instructed to stop updating the equalizer information after the training so as to be strong against phase hits and instantaneous interruptions when receiving image information. After adjusting the modem 109, a CFR (reception preparation certainty signal) is transmitted (phase F6). The transmitter side transmits PIX which is transmission image data to be transmitted (phase F7). When the transmission is completed, the transmitter transmits an EOM (message end signal) to the receiver (phase F8). After receiving image information, when post messages are received (phases F9, F10), when response (MCF / RTN / PPR, etc.) is returned, it takes time to record and decode image information and cannot respond immediately. Waits for the resend of the post message. T.A. The 30 recommendation stipulates that retransmission be waited if a reply cannot be made within 1.5 seconds, but if the transmitter is in the VoIP mode, it waits for retransmission if it cannot reply within 500 milliseconds. By doing so, it is possible to avoid a collision between the post message and the response. Then, similarly to the communication sequence of phases F1 to F10, phases F11 to F16 are performed. When the transmission is completed, the transmitter transmits a DCN (disconnection command signal) to the receiver (phase F17), and the lines of both the devices are disconnected. Will be.
[0017]
Next, the response reception operation in the communication apparatus according to the present embodiment will be described with reference to FIG.
First, it is monitored whether or not a flag has been received (step S101). If the flag is detected (step S101; YES), it is determined whether or not a frame has been received normally (step S102). When the frame is normally received (step S102; YES), the operation is terminated as reception completion (step S103). On the other hand, when the flag is not detected (step S101; NO), it is determined whether or not the VoIP mode is described above (step S104). If it is not the VoIP mode (step S104; NO), it is monitored whether the response waiting timer T4 has passed 3 seconds (step S105). If not (step S105; NO), the process returns to step S101. If it has elapsed (step S105; YES), it is determined that the reception has failed, and the operation is terminated (step S109). On the other hand, if it is the VoIP mode in step S104 (step S104; YES), it is monitored whether the response waiting timer T4 has passed 4.5 seconds (step S106). If not (step S106; NO), step S101. Return to. If it has elapsed (step S106; YES), the operation is terminated because the reception has failed (step S110). If the frame is not normally received in step S102 (step S102; NO), it is monitored whether or not the carrier is disconnected (step S107). If the carrier is disconnected and 200 msec elapses, reception is not performed. The operation is terminated as a failure (step S107; YES, step S108; YES, step S109). If 200 msec has not elapsed in step S108 (step S108; NO), the process returns to step S107. On the other hand, if the carrier is not disconnected in step S107 (step S107; NO), it is monitored whether or not the response waiting timer T4 has passed 3 seconds (step S110) and if not (step S110; NO). Return to step S102. If it has elapsed (step S110; YES), a disconnection command signal DCN is transmitted to release the line (steps S111 and S112).
[0018]
Next, the response operation to the post message in the communication apparatus according to the present embodiment will be described with reference to FIG. 4 showing the operation flow.
First, image information is received (step S201), and if a post message is subsequently received (step S202), it is determined whether or not a response can be made (step S203). If it is determined that it is possible (step S203; YES), a response (NCF / RTN / PPR, etc.) is transmitted (step S207). On the other hand, when it is determined that a response to the post message cannot be made (step S203; NO), it is determined whether or not the VoIP mode is set (step S204). When not in the VoIP mode (step S204; NO), as described above, the T.P. According to the 30 recommendation, it is stipulated to wait for retransmission when a response cannot be made within 1.5 seconds. Therefore, it is monitored whether 1.5 seconds have elapsed (step S205). If 1.5 seconds have elapsed (step S205; YES), return to step S202 to wait for retransmission of the post message. If 1.5 seconds have not elapsed (step S205; NO), return to step S203 to respond. Determine again. If it is the VoIP mode in step S204 (step S204; YES), it is monitored whether 0.5 second has elapsed (step S206). If 0.5 seconds have elapsed (step S206; YES), the process returns to step S202 to wait for retransmission of the post message. If 0.5 seconds have not elapsed (step S206; NO), the process can return to step S203 and respond. It will be judged again. By doing so, it is possible to avoid a collision between the post message and the response.
[0019]
FIG. 5 is a block diagram showing the system configuration of the present invention. That is, this figure shows the hardware constructed from a microprocessor or the like for executing the software by communication method of the present invention. In the figure, the facsimile communication system includes an interface (hereinafter abbreviated as I / F) 51, a CPU 52, a ROM 53, a RAM 54, a display device 55, a hard disk 56, a keyboard 57, and a CD-ROM drive 58. Also, providing a general purpose processor, a readable storage medium such as a CD-ROM 59, a program for executing the communication method of the present invention are stored. Further, a control signal is input from an external device via the I / F 51, and an instruction by the operator or a program of the present invention is automatically activated by the keyboard 57. Then, CPU 52 is subjected to control processing associated with the communication method described above according to the program, and stores the processing result in a storage device such as a RAM54, a hard disk 56, and output to the display device 55 as required. As described above, by using a medium having a program stored for executing the communication method of the present invention, without changing the existing system, it is possible to construct a communication system universally.
[0020]
In addition, this invention is not limited to the said Example, It cannot be overemphasized that various deformation | transformation and substitution are possible if it is description in a claim.
[0021]
【The invention's effect】
As described above, the communication device according to the present invention allows a user to set a communication network that performs signal conversion other than a public telephone exchange network such as a VoIP network or TDM, have a communication control unit communication network signal conversion in other public switched telephone network, such as TDM is performed to notify the calling party during call response to the effect mediated, communication control unit, a non-standard facilities signal from the called party As a result of the analysis, when it is set that the communication side for signal conversion other than the public switched telephone network such as the VoIP network or TDM intervenes, the timer setting value of the response waiting timer is set. It is characterized by changing . Therefore, it is possible to perform communication in consideration of delay according to the form of the communication network in which the communication device is installed, operate the modem properly, and ensure communication quality.
[0025]
In addition, according to the communication method of the present invention as another invention, the user is allowed to set so that a communication network that performs signal conversion other than a public telephone exchange network such as a VoIP network or TDM is interposed, When a call is made, the called party is notified that a communication network that performs signal conversion other than a public telephone exchange network such as a VoIP network or TDM is present. In the communication method of the present invention, a non-standard function identification signal from the incoming side is analyzed, and as a result of the analysis, a communication network in which the incoming side is subjected to signal conversion other than a public telephone exchange network such as a VoIP network or TDM is interposed. When the effect is set, the timer setting value of the response waiting timer is changed. Therefore, it is possible to perform communication in consideration of delay according to the form of the communication network in which the communication device is installed, operate the modem properly, and ensure communication quality.
[0029]
Furthermore, another invention, the computer is characterized by a computer-readable recording medium which stores a program order to execute the communication method described above. Therefore, a general-purpose communication system can be constructed without changing an existing system.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of a communication apparatus according to an embodiment of the present invention.
FIG. 2 is a diagram illustrating a communication sequence in the communication apparatus according to the present embodiment.
FIG. 3 is a flowchart illustrating a response reception operation in the communication apparatus according to the embodiment.
FIG. 4 is a flowchart showing a response operation to a post message in the communication apparatus according to the embodiment.
FIG. 5 is a block diagram showing a system configuration of the present invention.
[Explanation of symbols]
100; Communication device 101; Reading unit 102; Recording unit
103; Coding / decoding unit; 104; System control unit; 105; System memory;
106; Image information memory 107; Operation display unit 108; Communication control unit
109; modem, 110; SW unit, 111; system bus.

Claims (3)

In communication equipment,
The user is allowed to set a communication network that performs signal conversion other than the public telephone exchange network such as the VoIP network or TDM, and the signal conversion is performed outside the public telephone exchange network such as the VoIP network or TDM. communication network have a communication control unit to notify the called party when a call to the effect that intervening that,
The communication control unit analyzes the non-standard function identification signal from the incoming side, and as a result of the analysis, a setting is made that the incoming side has a communication network in which signal conversion other than the public telephone exchange network such as the VoIP network or TDM is performed. A communication apparatus characterized by changing a timer set value of a response waiting timer when The user is allowed to set a communication network that performs signal conversion other than the public telephone exchange network such as the VoIP network or TDM, and the signal conversion other than the public telephone exchange network such as the VoIP network or TDM can be performed. In a communication method for notifying a called party when a call is made that a communication network is performed,
When the non-standard function identification signal from the incoming side is analyzed, and the result of the analysis is that the incoming side is set to include a communication network in which signal conversion other than the public telephone exchange network such as the VoIP network or TDM intervenes A communication method characterized by changing a timer set value of a response waiting timer . A computer-readable recording medium storing a program for causing a computer to execute the communication method according to claim 2 .

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