JP3592823B2 - Data communication device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to data communication using a telephone line, such as a public telephone, which collects a charge by generating a charging pulse.
[0002]
[Prior art]
For example, in data transmission using a telephone line for a public telephone, a billing pulse for collecting a bill may be generated, and communication data may be lost or garbled. It is necessary to request data retransmission for communication data loss or data corruption as described above. For the purpose of minimizing data retransmission, transmission data is divided into certain small sizes (blocks). It was supposed to do the transfer.
[0003]
As another control method, as disclosed in Japanese Patent Application Laid-Open No. 2-90865, it is also conceivable to acquire the generation cycle of the charging pulse and temporarily stop data transmission or data reception at the generation timing of the charging pulse. Had been.
As described above, conventionally, a data transfer method has been considered on the premise that a billing pulse is generated, and how to prevent the influence of the billing pulse as a main viewpoint.
[0004]
[Problems to be solved by the invention]
However, if the transmission data is divided into certain small blocks and transferred, the total number of blocks to be transmitted increases, which increases the load required for blocking and the load related to response processing required for each block, and increases the transfer efficiency. Will be reduced. In addition, when the method of acquiring the charging pulse generation cycle and temporarily stopping data transmission / reception at the timing of the generation of the charging pulse is used, it takes extra time to stop data transmission. The frequent generation of pulses will significantly increase the transfer time.
[0005]
SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem, and eliminates the generation of a charging pulse by using an incoming charging service that does not generate a charging pulse, thereby reducing data communication errors such as data loss and data corruption. It is an object of the present invention to provide a data communication device that prevents occurrence of data and an increase in data transfer time.
[0006]
Means for Solving the Problems and Effects of the Invention
The data communication device according to claim 1,
In a data communication device capable of performing data communication with a called device using either a telephone line where a charging pulse is generated or a telephone line where a charging pulse is not generated,
Charging pulse detecting means for detecting the presence or absence of a charging pulse;
A first telephone number for calling the called device, a second telephone number for calling the called device, and a second telephone number registered for the ringing billing service are stored. Telephone number storage means,
When a charging pulse is detected by the charging pulse detecting means in a state where the line is connected by calling the receiving side device with the first telephone number, the next call to the called side device is made. Calling control means for making a call using the second telephone number.
[0007]
According to the present data communication device, a telephone line that generates a charging pulse to which a public telephone or a pink telephone is connected or a telephone line that does not generate a charging pulse to which a general telephone at home is connected is used. Data communication can be performed by using the first telephone number to call the called device. As a result, when a response signal is transmitted from the called device, the line connection state is established. After the line is connected, if a charging pulse is detected by the charging pulse detecting means, the next call to the called device is made using the second telephone number.
[0008]
The first telephone number is, for example, a normal telephone number assigned to a host station, which is an example of a called device, and the second telephone number is, for example, the host station having the first telephone number. This is a toll-free number contracted separately with a telephone company. The terminating billing service is a service in which a caller pays a telephone charge usually paid by a caller, and the callee registers a specific telephone line in advance as a call-charging service so that a call received by the telephone line can be received. The fee is charged to the called party. Therefore, for example, when a normal telephone number assigned to the host station is dialed from a public telephone or a pink telephone, a charging pulse is generated on the connected line, but the toll-free number registered in advance by the host station is used. This makes it possible to realize a line state in which no billing pulse is generated even when dialing from a public telephone or a pink telephone.
[0009]
That is, when a billing pulse is detected, the next call is made using the second telephone number for the terminating billing service, so that billing pulses can be prevented from being generated, and data loss and data corruption can be prevented. In addition, in order to minimize data retransmission requests, it is not necessary to perform processing for avoiding charging pulses, such as dividing transfer data finely or stopping data transmission / reception in synchronization with charging pulses. No speed reduction occurs.
[0010]
On the other hand, when data communication is performed using a connected telephone line such as a general telephone at home, the second telephone number is used because no billing pulse is generated even when dialing with the first telephone number. Thus, data transmission and reception not affected by the charging pulse can be realized.
[0011]
By the way, with respect to the above-mentioned point “the next call to the called device is made using the second telephone number”, for example, the call control means makes the next call only using the second telephone number. It is conceivable to make a predetermined number of calls including the next call using the second telephone number, or to make all the third and subsequent calls using the second telephone number.
[0012]
When a predetermined number of calls are made using the second telephone number, for example, a line that generates a charging pulse to which a pink telephone or a public telephone is connected, and a charging pulse to which a general telephone at home is connected. This is effective in the case of a data communication device which is likely to be moved and installed between lines that do not cause the problem. This is because, by calling a predetermined number of times using the second telephone number and then calling using the first telephone number, it is determined whether the first telephone number has become effective in the mobile installation of the data communication device. Can be determined, and a call is not made using the second telephone number despite being connected to a line that does not generate a charging pulse, such as a general telephone at home.
[0013]
As described above, when a data communication device is connected to a line on which no charging pulse is generated even when a call is made using the first telephone number, it is preferable to use the first telephone number. In data communication, it is common for a caller to pay a line usage fee. For example, in data communication using a toll-free number as described above, the host station is charged, and the host station is charged. This is because the side needs to collect the line usage fee from the caller using some method.
[0014]
On the other hand, if all the third and subsequent calls are made using the second telephone number, for example, when the data communication device is fixedly installed on the line where the billing pulse is generated, the second and subsequent calls are made. By making a call with the second telephone number, a line connection free from the influence of the charging pulse can be realized, and the charging pulse is not detected many times, which is effective.
[0015]
In the data communication device according to the present invention, when the charging pulse is detected by the charging pulse detecting means while the line is connected by calling the called device with the first telephone number, It is characterized in that the line is temporarily disconnected, and the call control means is re-established using a second telephone number.
[0016]
In this case, if the called device is called with the first telephone number, and the called device responds to the line connection state, and the charging pulse detecting means detects the charging pulse, it will be activated. Then, the line is disconnected and the called device is called again with the second telephone number, and the line is connected again.
[0017]
In other words, as "the next call to the called device", it is conceivable that the data communication is performed as it is after the detection of the charging pulse, and the next call is made with the second telephone number when the data communication is performed. However, in this case, the first data communication is affected by the charging pulse. Therefore, after detecting the charging pulse, the data communication is forcibly terminated, and the called device is called using the second telephone number. In this case, data transmission and reception not affected by the charging pulse can be realized even in the first data communication.
[0018]
On the other hand, in the data communication apparatus according to the third aspect, the telephone number storage means further stores a third telephone number assigned to the own data communication apparatus, and uses the third telephone number to perform own data communication. If the busy tone from the exchange is not detected as a result of calling the device, the mobile communication device has mobile installation determining means for determining that the data communication device has been mobile installed. Is characterized in that the call control means is configured to make the next call to the called device with the first telephone number.
[0019]
In this case, in order for the data communication apparatus to determine its own movement, the telephone number assigned to the data communication apparatus is stored in the telephone number storage means as a third telephone number, and the third telephone Call your data communication device by number. This processing may be performed, for example, periodically, or may be performed whenever the power of the data communication apparatus is turned on. As a result, if the busy tone from the exchange cannot be detected, the mobile installation judging means judges that the data communication device has been moved and installed, and the call control means calls the first telephone number to the called device. Make a call.
[0020]
For example, if the data communication device is configured to call the called device with the second telephone number based on the first billing pulse detection result even after the third time, once the billing pulse is detected, Is made with the second telephone number, and the first telephone number will not be dialed. Therefore, even when the data communication apparatus is moved and installed on a line in which no charging pulse is generated, such as a general telephone at home, a situation occurs in which a call is continuously made using the second telephone number.
[0021]
However, as described above, even if a call is made using the first telephone number, if no billing pulse is generated, the first telephone number is not used without using the second telephone number. It is better to use.
With this configuration, even when the mobile installation is performed as described above, it is possible to determine whether the first telephone number is available by calling again using the first telephone number. It is possible to select an optimal telephone number for making a call.
[0022]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows that the data communication apparatus 1 is connected via a public telephone line 30 as a "telephone line in which a charging pulse is generated" or a general telephone line 40 as a "telephone line in which a charging pulse is not generated" shown by a broken line. 5 shows a state in which it is connected to the host station 50 as a “calling side device”.
[0023]
The configuration of the data communication device 1 includes a CPU 10 as control means for controlling the operation of the entire data communication device. The CPU 10 includes a RAM 12 which is a work area for an operation program of the CPU 10, and an operation program of the CPU 10. ROM 14 for storage, modem 16 for transmitting / receiving data to / from a modem at the host station 50 as a communication partner through either the public telephone line 30 or the general telephone line 40, and connection / disconnection of a line to / from a network. An NCU (Network Control Unit) 18 for dialing, a charging pulse detection circuit 20 as "charging pulse detecting means" for detecting the presence or absence of a charging pulse and informing the CPU 10 of the first telephone number; "Telephone number storage means" for storing the second telephone number and the third telephone number Memory device 22 is connected to. Note that the memory device 22 is a non-volatile memory, and the stored contents are not lost even when the power supply is stopped. Further, it is assumed that the memory device 22 also has a variable area for storing the result of the charging pulse detection and the like.
[0024]
Here, the first telephone number, the second telephone number, and the third telephone number will be described. “First telephone number” is a normal telephone number given to the host station 50. When this normal telephone number is used, a billing pulse is generated when the data communication device 1 is connected to the public telephone line 30. On the other hand, when the data communication device 1 is connected to the general telephone line 40, no billing pulse is generated.
[0025]
The "second telephone number" may be a toll-free number or the like contracted in advance by a host company 50 with a telephone company separately from a normal telephone number. When the toll free number is used, no billing pulse is generated even when the data communication device 1 is connected to the public telephone line 30. Of course, even when connected to the general telephone line 40, no billing pulse is generated.
In this embodiment, a free dial number will be described as an example. However, the present invention is not limited to the free dial, and any telephone number for an incoming call billing service may be used.
[0026]
The “third telephone number” is the telephone number of the data communication device 1 itself given to the data communication device 1.
The CPU 10 controls the "calling control means" for controlling the dialing process for calling based on the detection result of the charging pulse, and the "moving setting determining means" for determining when the data communication apparatus 1 is moved and installed. ".
[0027]
Next, the operation of the data communication device 1 will be described.
FIG. 2 is a flowchart showing data communication of the data communication device 1.
First, in step S100, an off-hook operation is performed, and then in step S110, a branch operation is performed with reference to the flag K. It is assumed that the flag K is secured as a variable in the memory device 22. That is, even if the power of the data communication device 1 is turned off, the value of the flag K is stored.
[0028]
In S110, it is determined whether the flag K = 0. If K = 0 (S110: YES), the process proceeds to S120, where the CPU 10 controls the NCU 18 to dial a normal telephone number as the "first telephone number". On the other hand, if the flag K is not 0 (K = 1) (S110: NO), the process proceeds to S130, where the CPU 10 controls the NCU 18 to obtain the “second telephone number” contracted by the host station 50 in advance. Dial the toll-free number.
[0029]
That is, when the flag K = 1, it indicates that a charging pulse was detected at the time of the previous line connection, and when the flag K = 0, it indicates that no charging pulse was detected at the time of the previous line connection. It is also assumed that the initial value 0 is substituted for the flag K at the time of the first line connection.
[0030]
When the incoming host station 50 responds to the call processing in S120 or S130, the line is connected. When the line is connected, an interrupt is permitted in S140. Thereafter, when the charging pulse detection circuit 20 detects the charging pulse and sends a signal for detecting the charging pulse to the CPU 10, the CPU 10 starts the interrupt processing. The interrupt processing will be described later.
[0031]
At S150, data communication processing is performed, and data transmission and reception are performed. When this data transmission / reception is completed, interruption is prohibited in S160. Finally, the line is disconnected by the on-hook operation in S170, and the process ends.
Next, the interrupt processing will be described with reference to the flowchart of FIG. When a charging pulse detection signal is sent to the CPU 10 by the charging pulse detection circuit 20 during the processing from the interrupt permission (S140) to the interrupt prohibition (S160), the CPU 10 starts the interrupt processing shown in FIG. .
[0032]
First, 1 is substituted for the flag K in the first step S200. In the following S210, the process of prohibiting the interrupt is executed, the interrupt process is ended, and the process returns to the process immediately before the start of the interrupt process.
Here, the flow of the data communication process of the data communication device 1 described above will be specifically described.
[0033]
First, the case where the data communication device 1 is connected to the public telephone line 30 will be described. First, an off-hook operation is performed (S100), and the flag K is determined (S110). Since the initial value 0 is substituted for the flag K at first, a normal telephone number is dialed (S120). After the line is connected and the interruption is permitted (S140), data transmission / reception is started (S150). Now, since the data communication device is connected to the public telephone line 30, the generation of the billing pulse is detected by the billing pulse detection circuit 20, and the CPU 10 performs the interrupt processing of FIG. In this interrupt processing, the flag K becomes 1 (S200), and after the interrupt prohibition processing is performed (S210), the process returns to the processing immediately before the occurrence of the interrupt, and the data transmission / reception processing is continuously performed (S150). When the data transmission / reception process is completed, an interrupt prohibition process is performed (S160), and the data communication is terminated by an on-hook operation (S170).
[0034]
The interrupt processing may occur from immediately after the interruption is permitted (S140) to immediately before the interruption is prohibited (S160), and does not necessarily occur during the data transmission / reception processing (S150) as described above. .
In the subsequent second data communication, after the off-hook operation (S100), the flag K is set to 1 by the interrupt processing at the previous communication (S110: NO), so that the free dial number is dialed (S130). Although the line is connected and interruption is permitted (S140), no interruption processing occurs because no charging pulse is generated on the line connected from the toll-free number. Subsequently, data transmission / reception is performed (S150), and after interrupt prohibition processing is performed (S160), the data communication processing is terminated by an on-hook operation (S170). That is, the second data communication uses the toll-free number, so that even when the data communication device is connected to the public telephone line 30, data transmission / reception without the influence of the charging pulse can be realized.
[0035]
Similarly, at the time of the third communication and thereafter, the judgment is made based on the value of the flag K set at the first time (= 1) (S110). Since the free dial number is used, data transmission / reception not affected by the charging pulse is realized. Will be.
Next, a case where the data communication device 1 is connected to the general telephone line 40 will be described. First, an off-hook operation is performed (S100), the process branches depending on the initial value (= 0) of the flag K (S110: YES), and a normal telephone number is dialed (S120). When the line is connected, an interrupt is permitted (S140), and then data transmission and reception are performed (S150). In a general telephone line, no billing pulse is generated even when a call is made with a normal telephone number, so that no interrupt processing is performed. When the data transmission / reception is completed, an interrupt prohibition process is performed (S160), and the data communication is terminated by an on-hook operation (S170).
[0036]
At this time, since the value of the flag K remains 0, the second and subsequent calls are performed in the same manner as the first call, and the call is made with a normal telephone number.
When the data communication device 1 is fixedly installed, the operation described above can be performed without any problem. Next, consider a case where the data communication device 1 is mobilely installed.
[0037]
For mobile installation, when moving from one general telephone line 40 to another general telephone line 40, when moving from one public telephone line 30 to another public telephone line 30, and moving from one general telephone line 40 to another public telephone line 30, And a mobile installation from the public telephone line 30 to the general telephone line 40 are conceivable.
[0038]
First, consider a case where a mobile telephone is moved from one general telephone line 40 to another general telephone line 40. In this case, the data communication device connected to the general telephone line 40 dials a normal telephone number. For this reason, even if the mobile telephone is moved to another general telephone line 40, the telephone number is similarly dialed and there is no problem.
[0039]
Next, consider a case where a mobile phone is moved from one public telephone line 30 to another public telephone line 30. In this case, the data communication device connected to a certain public telephone line 30 dials a toll-free number. For this reason, even when the mobile phone is moved to another public telephone line 30, the same number is dialed similarly and there is no problem.
[0040]
Next, the case where the mobile telephone line 40 is moved from the general telephone line 40 to the public telephone line 30 will be considered. In this case, the data communication device connected to the general telephone line 40 dials a normal telephone number. For this reason, when the mobile telephone 30 is moved and installed on the public telephone line 30, there is no problem since the first operation is to dial a normal telephone number, detect a billing pulse, and then dial a toll-free number.
[0041]
Finally, a case where the mobile telephone line 30 is moved from the public telephone line 30 to the general telephone line 40 will be considered. In this case, the data communication device connected to the public telephone line 30 dials a toll-free number. For this reason, when the mobile telephone is moved to the general telephone line 40, the user continues to dial the toll-free number even though the mobile telephone is moved to a line where no billing pulse is generated. If the user dials the toll-free number, no billing pulse is generated, so that the billing pulse has no effect. However, in data communication using toll-free numbers, the host station is charged, and on the assumption that the calling party pays the line usage fee, the host station uses the line usage fee in some way. Must be collected from the calling party. Therefore, if no billing pulse is generated when a call is made with the first telephone number, it is preferable to use the first telephone number.
[0042]
Therefore, in the present embodiment, by performing the movement determination process shown in the flowchart of FIG. 4 every week, it is determined whether or not the data communication device is to be moved, and when the data communication device is connected to the general telephone line 40, , So that the called device can be called using a normal telephone number. Hereinafter, the operation of the movement determination process of the data communication device 1 will be described with reference to FIG.
[0043]
First, an off-hook operation is performed in S300, and the telephone number assigned to the data communication device 1 is read from the memory device 22 in S310, and the CPU 10 controls the NCU 18 to dial the telephone number. After dialing, a busy sound is detected in S320 for a certain period of time. In the present embodiment, the busy sound is detected for 10 seconds, and if the busy sound is detected (S320: YES), it is determined that the portable telephone is not moved and installed, and the process is terminated as it is. If a busy tone is not detected (S320: NO), it is determined that the mobile phone has been moved and installed, and in S330, 0 is substituted for the flag K, and the process ends.
[0044]
Considering the above operation in a case where the data communication device 1 connected to the public telephone line 30 is moved and installed, first, an off-hook operation is performed (S300), and then the data communication device 1 is provided to the data communication device 1 before the mobile installation. The telephone number is dialed (S310). Since the data communication device 1 is mobile and does not match the telephone number currently assigned to the data transmission device 1, no busy tone is detected (S320: NO). Therefore, it is determined that the mobile device has been moved and installed, and 0 is substituted for the flag K (S330).
[0045]
Thereafter, when data communication processing is performed, a call is made with a normal telephone number because the flag K = 0. Therefore, the subsequent operation is exactly the same as the data communication process described above, and the description is omitted here.
As described above, according to the present embodiment, when a call is made with a normal telephone number, the toll-free call is made even if the call is connected to the public telephone line 30 which is originally affected by the billing pulse. By using this, generation of a billing pulse can be eliminated, and data transmission / reception free from the influence of the billing pulse can be realized. As a result, loss of data and garbled data can be prevented, and in order to minimize data retransmission requests, charging pulses are avoided, such as dividing transfer data finely or stopping data transmission / reception in synchronization with charging pulses. Therefore, the transfer speed does not need to be reduced, so that the transfer speed does not decrease.
[0046]
In other words, conventionally, there has been considered a method of preventing the influence of the charging pulse on the premise of the generation of the charging pulse. Had led to a decline. However, by using the above-described method, even when using a line to which a pay telephone or a pink telephone is connected, which generates a charging pulse, a call that does not generate a charging pulse, that is, a call using a toll-free number. As a result, generation of a charging pulse can be eliminated. As a result, it is possible to perform the same preferable data transfer as a line to which a general telephone or the like in the home is connected without generating a charging pulse.
[0047]
Further, as described with reference to FIG. 4, it is possible to determine whether the data communication device 1 is moved and installed. When the data communication device 1 is moved and installed, a call is made using a normal telephone number. ing. As a result, a call toll-free call that causes a charge collection process on the host side is limited only when the data communication apparatus 1 is connected to the public telephone line 30 where a billing pulse is generated, and is connected to the general telephone line 40. When a call is made, a call is made using a normal telephone number.
[0048]
As described above, the present invention is not limited to such an embodiment at all, and can be implemented in various forms without departing from the gist of the present invention.
For example, in the above embodiment, all subsequent calls are made based on the detection result of the first billing pulse. However, "the next call to the called device" is a predetermined number of calls. An embodiment is also conceivable in which a call is made with a toll-free number, and after a predetermined number of calls are completed, a call is made with a normal telephone number.
[0049]
Further, in the above embodiment, when the charging pulse is detected, the data transmission / reception is continued after executing the interrupt processing, so that the first data transmission / reception is affected by the charging pulse. Become. Therefore, when the billing pulse is detected, the data transmission / reception may be temporarily terminated, and the call may be re-established using the free dial. In this way, data transmission / reception that is not affected by the charging pulse can be performed from the first data transmission / reception.
[Brief description of the drawings]
FIG. 1 is an electric block diagram of a data communication device according to an embodiment.
FIG. 2 is a flowchart illustrating a data communication process of the data communication device.
FIG. 3 is a flowchart illustrating an interrupt process of the data communication device.
FIG. 4 is a flowchart showing a mobile installation determination process of the data communication device.
[Explanation of symbols]
1. Data communication device 10. CPU
12 ... RAM 14 ... ROM
16 Modem 18 NCU (Network Controller)
20: Billing pulse detection circuit 22: Memory device 30: Public telephone line 40: General telephone line 50: Host station

Claims (3)

In a data communication device capable of performing data communication with a called device using either a telephone line where a charging pulse is generated or a telephone line where a charging pulse is not generated,
Charging pulse detecting means for detecting the presence or absence of a charging pulse;
A first telephone number for calling the called device, a second telephone number for calling the called device, and a second telephone number registered for the ringing billing service are stored. Telephone number storage means,
When a charging pulse is detected by the charging pulse detecting means in a state where the line is connected by calling the receiving side device with the first telephone number, the next call to the called side device is made. A data communication device comprising: a calling control unit that performs a call using the second telephone number. When a charging pulse is detected by the charging pulse detecting means in a state where the line is connected by calling the called device with the first telephone number, the line is temporarily disconnected and the second communication is newly performed. 2. The data communication apparatus according to claim 1, wherein said call control means is configured to make a call again using said telephone number. The telephone number storage means further stores a third telephone number assigned to the own data communication device. As a result of calling the own data communication device with the third telephone number, a telephone call from the exchange is transmitted. If the middle sound is not detected, the data communication device has a mobile installation determining unit that determines that the data communication device has been mobile installed,
When it is determined by the mobile installation determining means that the mobile terminal has been moved and installed, the call control means is configured to make a next call to the called device using the first telephone number. The data communication device according to claim 1 or 2, wherein

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