JP2000261571A - Data communication equipment and recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform a connection and communication meeting the needs of a user without manually selecting the connection destination by selecting communication speed priority or of charge priority as the selection condition of the connection destination of the user. SOLUTION: This data communication equipment utilizes dial-up and is provided with an information acquiring means 13 for acquiring communication information, an information storage means 14 for storing that communication information, a charging information storage means 15 for storing charging information, a determining means 16 for determining the connection destination from the communication information and the charging information, a dial information preparing part 17 and a dial information sending part 18 for preparing and sending dial information from the information determined by the determining means 16 and when data communication can be performed with one port through plural routes, the data communication is performed by selecting a route while referring to the communication information in the past.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data communication device and a recording medium, and more particularly, to a World Wide Web (WW).
The present invention relates to a data communication apparatus and a recording medium for performing access to W) using dial-up.

[0002]

2. Description of the Related Art Conventionally, when a call is made to a destination having the same destination telephone number, an LCR (Least Cost Rou) which selects and transmits a line having the lowest communication fee from a predetermined communication time.
ting). FIG. 8 shows a connection diagram of data communication via a provider. 1 is a data communication terminal, C1, C2, ‥‥
‥, Cn is a line, P1, P2, ‥‥‥, Pn are providers,
Reference numeral 2 denotes a server device. This system shows a case where a line C2 is selected from a plurality of providers P1, P2,..., Pn and connected to the server device 2 via the provider P2 for communication.

[0003] Japanese Patent Application Laid-Open No. 5-56074 discloses that
A technology that automatically selects the network with the lowest communication cost by adding a network selection function to a facsimile storage and switching device, and saves communication costs between facsimile devices without requiring the caller to be aware of it Have been.

[0004]

As described above, when accessing a WWW server or connecting to the Internet such as e-mail from a dial-up line via providers P1, P2,. Charges for providers and connection lines used varied.
Also, depending on the transmission capacity provided by the provider,
The communication speed also differs.

Further, in the case of the above system, for example,
It is rare that the amount of transmission is known in advance, such as facsimile transmission described in Japanese Patent Application Laid-Open No. 5-56074, and a method of selecting the cheapest line from the amount of transmission and the destination cannot be used.

[0006] Recently, there is a data communication device having a plurality of line interfaces, and has the following problems. Business phones and PABX (Private
There are communication terminals that accommodate heterogeneous lines, such as Automatic Branch eXchange, in recent years.
rsonal Digital Assistant) and PHS (Personal Handy)
In addition, terminals that accommodate heterogeneous lines have begun to appear among personal portable terminals that combine the two systems.

[0007] Usually, a user performs a communication purpose or a communication fee by himself / herself at the time of use. On the circuit-switched basis, by using the LCR function, it is possible to select the cheapest communication carrier route from the other party's destination and the estimated communication time between them, and the user can select the selected communication carrier. It is possible to communicate without being conscious.

However, in a situation where the use of a communication network is shifting from a voice-based use mode to a data communication use, general consumers enjoy packet-switched services in addition to circuit-switched network services. It has become a form that can be. In addition, when using the above-described line-mixed type terminal or the like, it is not possible to immediately determine which line has the advantage of using a charge, and even if the LCR function is activated, it is difficult to determine whether the LCR function is activated. After capturing one line first, the optimum route is selected. Further, when performing data communication using a dial-up connection, in addition to the charge for the communication line, the ISP (Intern
et Service Provider), so if this combined value becomes cheaper, the economics will improve.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and is intended to provide a data connection and communication that meet the needs of a user without the user manually selecting a connection destination. It is an object to provide a communication device and a recording medium. Further, the present invention relates to a data communication apparatus and a recording medium that can select a line interface and a connection destination without any particular consciousness of a user in a data communication apparatus having a plurality of line interfaces and realize a low communication fee. It is intended to provide.

[0010]

SUMMARY OF THE INVENTION A data communication apparatus according to the present invention utilizes dial-up, and obtains information as transmission information obtained from a communication data amount to be transmitted and received and a transmission speed obtained from a communication time. Means, information storage means for storing the communication information obtained by the information obtaining means, connection determining means for determining a connection destination based on the communication information, and dial information creation and transmission based on the information determined by the connection determining means. Dialing means.

The information acquisition means acquires communication time as communication information, and includes charging information storage means for storing a telephone number and a charging system for each connection destination as charging information. Is to determine the connection destination based on the communication information and the billing information, so that the connection destination can be determined in consideration of the communication cost.
Further, when the connection determining means determines the connection destination,
By providing a condition selecting means for selecting a priority condition,
Connection and communication can be performed by switching to conditions that meet the needs of the user.

When the condition selecting means selects the communication cost as the priority condition, the connection determining means determines at least one of an average value, a median value, and a mode value of the past communication time for each connection. Since the connection destination is determined based on the fee charged when the connection is made during the period depending on the connection, the data communication can be performed at a low price.
Further, when the condition selecting unit selects the communication speed as the priority condition, the connection determining unit determines a connection destination based on an average transmission speed of each past connection destination, so that high-speed connection is achieved. Data communication can be performed.

The data communication apparatus of the present invention utilizes dial-up, and includes a plurality of line interface means for connecting lines, and a transmission rate obtained from an amount of communication data to be transmitted and received and a communication time. Information acquisition means for acquiring as information, information storage means for storing the communication information acquired by the information acquisition means, and a billing system for each connection destination and a charge for connecting to the connection destination using a line. Charging information storage means, connection determining means for determining a connection destination based on the communication information and the charging information, and selecting means for selecting the line interface means to be used for connection based on the information determined by the connection determining means. And dial means for creating and transmitting dial information based on the information determined by the connection determining means. It is.

Further, the information storage means includes history information storage means for storing a history of past data transmission as history information, and the connection determination means determines a connection destination based on the history information. With this, it is possible to determine a line and a destination number suitable for the selection condition, and automatically make a call to the connection destination.

[0015] The history information storage means may store, for each connection destination, a time at which a connection for communication is started, a time at which the connection is terminated, an amount of communication data transmitted and received during the connection, dial information, and usage information. By storing at least one of the line interfaces as history information, it is possible to appropriately determine a line and a destination number suitable for the selection condition.

Also, the data communication apparatus of the present invention includes communication data amount designating means for designating a communication data amount of data transmission, and the connection determining means comprises a communication unit for data transmission designated by the communication data amount designating means. Since the connection destination is determined based on the data amount, the line interface and the connection destination can be selected according to the communication data amount specified by the user, and high-speed data communication can be performed.

Also, the data communication apparatus of the present invention includes communication data amount predicting means for predicting a communication data amount of data transmission based on history information stored in the history information storing means, and the connection determining means includes the communication determining means. Since the connection destination is determined based on the communication data amount of the data transmission predicted by the data amount prediction means, the communication data amount is automatically predicted so that the next connection will be at the optimal price. , A line interface and a connection destination can be selected and transmitted.

Further, the data communication apparatus of the present invention includes connection time designating means for designating a connection time for data transmission, and the connection determining means is based on the connection time for data transmission designated by the connection time designating means. By determining the connection destination by, for example, according to the connection time specified by the user, select the line interface and connection destination,
Data communication can be performed at a low communication fee.

The data communication apparatus according to the present invention further includes connection time prediction means for predicting a connection time for data transmission based on history information stored in the history information storage means, and the connection determination means includes the connection time prediction means. By determining the connection destination based on the data transmission connection time predicted by the means, the connection time is automatically predicted, and the line interface and the connection are set so that the next connection will be at the optimal price. You can select and send to the ground. Further, the present invention is a computer-readable recording medium in which a program for causing a computer to function as the data communication device is recorded.

[0020]

Embodiments of a data communication apparatus according to the present invention will be described below with reference to the drawings. FIG.
FIG. 1 is a block diagram illustrating an internal configuration of a communication terminal of a data communication device according to a first embodiment of the present invention. 11 is a line interface unit, 12 is a data transmission / reception unit, 13 is a communication monitoring unit, 14 is a communication information storage unit, 15 is a connection destination information storage unit,
16 is a connection destination selection unit, 17 is a dial information creation unit, 18
Denotes a dial information transmitting unit, 19 denotes a selection condition setting unit, 20 denotes an application, and 21 denotes the other terminal.

The connection destination information storage unit 15 stores an individual communication cost up to the other end point for each telephone number. The individual communication cost can be expressed by including the type of the billing system and the cost of each network when passing through a plurality of communication networks. First, in the data communication between the present terminal and the other terminal 21, the transmission data created by the application 20 is passed to the data transmitting / receiving unit 12, and the data is transmitted to the other terminal 21 via the line interface unit 11. On the other hand, data arriving from the terminal 21 is taken in from the line interface 11 to the data transmission / reception unit 12, and the reception data is passed to the application 20.

The transmission / reception operation is performed by measuring the amount of communication data transmitted and received by the communication monitoring unit 13 and the communication time.
When the measurement is completed, the measurement result is delivered to the communication information storage unit 14. The delivered result is added to the past communication data amount and communication time for each telephone number of the communication partner to obtain an average transmission speed for each telephone number, and this is stored. Also,
The average communication time for all past communications is determined, and this is also stored in the communication information storage unit 14.

Next, a procedure for selecting a communication partner in performing communication will be described. First, when the operation for selecting the other party is activated, the connection destination selection unit 16 is activated. here,
From the selection condition setting unit 19, a priority condition for selecting a destination telephone number is obtained. The selection conditions stored in the selection condition setting section 19 are set in advance by the user. Next, for each destination number, the communication information storage unit 1
Obtain the past average transmission speed and average communication time from 4,
An individual communication cost is acquired from the connection destination information storage unit 15.

Based on the acquired information, a destination telephone number suitable for the priority condition is selected. When the communication speed is a priority condition for performing high-speed data communication, a determination method to be selected is to select a partner having a high average transmission speed. When the communication cost is set as the priority condition to reduce the charge, the communication cost is determined based on the charge for connection during the average communication time, and the other party whose communication line cost is assumed to be the lowest is selected. Also, create an evaluation value based on the communication speed,
Apart from this, it is also possible to make a judgment based on a combination of the above conditions, such as creating an evaluation value based on the communication cost and making a judgment based on their sum.

The destination number selected by the connection destination selection unit 16 is sent to the dial information creation unit 17 and converted into a dial signal suitable for the line used by the dial information sending unit 18 and sent out. By the above operation, it is possible to select a partner suitable for a desired communication mode and perform data communication.

The present invention is not limited to the first embodiment. For example, in the above operation, an example in which the estimation of the connection time was obtained by the average was shown. However, depending on the usage form of the user, it may be possible to more accurately estimate using the median value or the mode value. Therefore, these may be used. For example, when a long call is made only once in the past, it is more appropriate to use the mode.

As the past data, data up to a certain number of times in the past (for example, 50 times) may be included, or data up to a certain period in the past (eg, one year) may be included. Is also good. FIG. 2 shows a second embodiment of the present invention.
FIG. 2 is a block diagram illustrating an internal configuration of a communication terminal of the data communication device according to the embodiment. The same components as those in FIG. 1 are denoted by the same reference numerals.

In FIG. 2, reference numeral 30 denotes a communication terminal, and reference numeral 21 denotes another terminal connected to the communication terminal 30 through a line.
The communication terminal 30 includes a plurality (k) of line interface units 311 installed corresponding to the plurality (n) of the lines 1 to n.
To 31k, an interface switching unit 32, a data transmitting / receiving unit 33, a communication monitoring unit 34, a communication information storage unit 35
, A billing table 36, a connection destination selection unit 37, a dial information transmission unit 38, a selection condition setting unit 39, and an application 40.

The line interface units 311 to 31k are line interface means for connecting a plurality of types of lines 1 to n to the apparatus. For example, in a mobile phone or the like that accommodates a PHS and a mobile phone at the same time, it is a line interface that supports different types of lines.

The interface switching unit 32 selects one of the plurality of line interface units 311 to 31k according to a switching signal from the connection destination selecting unit 37. Data transmission / reception section 3
3 transmits and receives data. The communication monitoring unit 34
The transmission rate obtained from the amount of communication data to be transmitted and received and the communication time are acquired as communication information, and various table information from the accounting table 36 is acquired.

The communication information storage unit 35 stores the communication information obtained by the communication monitoring unit 34 and the table information looked up from the charging table 36. Billing table 36
Is a look-up table that stores, as billing information, a telephone number and a billing system for each connected party, and a charge for connecting to the connected party using a line. The details of the charging table 36 will be described later.

The connection destination selection unit 37 includes a selection condition setting unit 39
The connection destination and the line are determined based on the communication information, the billing information and the table information in accordance with the instruction from, and the information of the connection destination is output to the dial information transmitting unit 38 and the line switching signal is output to the interface switching unit 32, respectively. The dial information sending unit 38 creates and sends dial information based on the connection destination information of the connection destination selection unit 37.

The selection condition setting unit 39 sets the communication partner and the selection condition according to the notification from the application 40,
Output to the connection destination selection unit 37. The selection conditions include a communication data amount of data transmission and a connection time. Further, the communication data amount and connection time of the data transmission may be specified by the user.

The application 40 is a program executed by a microcomputer inside the communication terminal. The application 40 outputs transmission data created by executing the program to the data transmission / reception unit 33, and outputs the transmission data to the data transmission / reception unit 3.
3 is processed. In addition, the communication partner and the selection condition are notified to the selection condition setting unit 39.

FIGS. 3 to 6 are diagrams showing an example of the configuration of a charging table 36 referred to inside the communication terminal 30. FIG. 3 shows the entire configuration of the charging table 36, FIG. FIG. 5 shows the transmission destination table, and FIG. 6 shows the line speed table.

The billing table 36 includes a line-by-line billing table 51, a transmission destination table 52, and a line speed table 53.
Consists of In the line-based charging table 51 (see FIG. 4), a plurality of applicable time zones and a plurality of charging degrees are stored for each of a plurality of (l) outgoing destinations corresponding to each of the line interface units 311 to 31k.

In the transmission destination table 52 (see FIG. 5), a plurality of (m
A plurality of application time zones and charging degrees are stored for each of the fixed charges. The line speed table 53 (see FIG. 6) stores line transmission speeds corresponding to the respective line interface units 311 to 31k.

Hereinafter, the operation of the data communication apparatus configured as described above will be described. First, the data communication between the communication terminal 30 and the other terminal 21 is performed by passing the transmission data created by the application 40 to the data transmission / reception unit 33 and transmitting the transmission data to the other terminal 21 via one of the line interface units 311 to 31k. The data is transmitted, and the data coming from the other terminal 21 is transmitted to the line interface units 311-3.
This is performed by passing the received data to the application 40 from 1k by the data transmitting / receiving unit 33.

In these transmission and reception operations, the communication monitoring unit 34 measures the amount of data transmitted and received and the communication time, and when the measurement is completed, the measurement result is delivered to the communication information storage unit 35. The delivered result is stored in the communication information storage unit 35 as stored communication information. FIG. 7 is a diagram illustrating a configuration example of communication information stored in the communication terminal. As shown in FIG. 7, for each index, the communication start time, the communication end time, the transmission destination, the line interface used, the amount of communication data transmitted and received during the connection, and the communication charge are stored as accumulated communication information.

Next, a procedure for selecting a communication partner in performing communication will be described. First, the application 40 notifies the selection condition setting unit 39 of the communication partner and the selection condition, whereby the selection condition setting unit 39 activates the connection destination selection unit 37 and notifies the communication partner and the selection condition. . Here, the communication partner notified from the application 40 is indicated by the telephone number of the partner or data communication via the ISP. In the case of data communication via the ISP, it is necessary that the connection destination selection unit 37 also selects and determines the telephone number of the connection destination ISP.

The selection condition stores either the communication data amount or the connection time. When the communication data amount is designated, the connection destination selecting unit 37 is operated so as to select an inexpensive route from a route having a statistically high transmission speed.
If the connection time is specified, the connection destination selection unit 37 is operated so as to select a route with a low connection fee for the connection for the specified time.

Next, in the activated connection destination selection unit 37,
Based on the selection condition received from the selection condition setting unit 39, the telephone number of the call destination and the line interface units 311 to 31k used for connection are selected. When the connection time is specified as a selection condition, first, a connection fee corresponding to the specified call destination is read from the call destination table 52 of the charging table 36. Next, from the line-by-line charging table 51 of the charging table 36, a record matching the above-mentioned calling destination is read, and a line fee is read. From the read connection fee and line fee, the sum of the fees is calculated in the designated connection time.

Among them, the transmission destination and line interface which are the combination of the cheapest charges are output as the selection result. If the connection destination is selected with reference to the past history, the record of the matching destination address is obtained from the communication history stored as the communication information stored in the communication information storage unit 35 instead of using the charging table 36. And the combination with the least expensive line interface is output as a selection result.

On the other hand, when the communication data amount is specified as the selection condition, the transmission speed of each of the line interface units 311 to 31k is first read from the line speed table 53 of the charging table 36, and the line speed is the fastest among them. Select a line interface. Next, the cheapest transmission destination is selected from the transmission destination table 52 of the charging table 36. Then, these combinations are output as selection results. If the connection destination is selected by referring to the past history, instead of using the charging table 36,
From the communication history of the communication information storage unit 35, a record of the matching transmission destination is read out, and among these, a combination with a line interface unit capable of obtaining the fastest line speed is output as a selection result. Note that the line speed can be obtained from the ratio between the data amount and the communication time.

Further, when the connection time is used as a selection condition, a set of records having a low charge and a set of records capable of increasing the line speed from the communication history are compared using the charging table 36. Thus, it is possible to output a combination with a more appropriate line interface unit as a selection result. Similarly, when the communication data amount is used as a selection condition, a set of records capable of obtaining a high line speed is compared with a set of records at a rate lower than the communication history using the charging table 36. It is also possible to output a combination with a more appropriate line interface unit as a selection result.

In order to use the selected line interface unit, the connection destination selection unit 37 sends a switching signal to the interface switching unit 32, and the interface switching unit 32
Transmits one of the line interface units 311 to 31k to be used by the switching signal to the dial information transmitting unit 38.
And the data transmission / reception unit 33. For example, in the case of FIG. 2, it is determined that the line (2) is to be used, and the line interface unit 312 is selected and the dial information transmitting unit 3 is selected.
8 and the data transmission / reception unit 33.

When the line interface section is selected, the connection destination selecting section 37 activates the dial information transmitting section 38 and instructs the transmission of the selected calling destination telephone number.
As a result, a dial signal is sent out to the line from any of the selected line interface units, the connection with the other terminal 21 is secured, and communication becomes possible. By the above operation, it is possible to perform data communication with the partner terminal using the appropriately selected line interface unit.

The data communication device described above is also realized by a program for causing the data communication device to function. This program is stored in a computer-readable recording medium. In the present invention, as the recording medium, the main memory itself may be a program medium, or a program reading device is provided as an external storage device, and the program medium can be read by inserting the recording medium into the program reading device. You may. In any case, the stored program is C
The configuration may be such that the PU accesses and executes the PU,
Alternatively, in any case, the program may be read, and the read program may be downloaded to a program storage area (not shown) and the program may be executed. It is assumed that this download program is stored in the main unit in advance.

Here, the program medium is a recording medium configured to be separable from the main body, such as a tape system such as a magnetic tape or a cassette tape, a magnetic disk such as a floppy disk or a hard disk, a CD-ROM / MO /
Disk system of optical disk such as MD / DVD, card system such as IC card / optical card, mask ROM, EP
It may be a medium that fixedly carries a program, including a semiconductor memory such as a ROM, an EEPROM, and a flash ROM.

Further, although not shown, in the case where a means capable of connecting to an external communication network is provided, the program is fluidly downloaded from the communication network via the communication connection means. It may be a medium that carries the program. When the program is downloaded from the communication network, the download program may be stored in the main device in advance or may be installed from another recording medium. Note that the content stored in the recording medium is not limited to a program, but may include data.

[0051]

As described in detail above, according to the present invention, at the start of data communication, a destination number suitable for the selection condition is determined from the past communication history and automatically transmitted to the connection destination. Condition selection means for performing data communication without having to be aware of a series of operations in which a user manually determines a destination and makes a call, and selects a priority condition. By providing, for example, to select at a low communication fee, or to select at the communication line speed, it is possible to switch the selection conditions, to select the other party, to connect and meet the needs of the user Communication can be performed.

Further, according to the present invention, a function of automatically selecting a line interface and a connection destination can be provided without the user being particularly conscious, and data communication can be performed at a low communication fee. In addition, at the start of data communication, a line and a destination number suitable for the selection conditions are determined based on the past communication history, and it is possible to automatically make a call to the connection destination. Data communication can be performed without being conscious of a series of operations of deciding a destination and performing transmission.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an internal configuration of a communication terminal of a data communication device according to a first embodiment of the present invention.

FIG. 2 is a block diagram illustrating an internal configuration of a communication terminal of a data communication device according to a second embodiment.

FIG. 3 is a diagram illustrating an example of the overall configuration of a charging table according to a second embodiment;

FIG. 4 is a diagram illustrating a configuration example of a per-line charging table according to a second embodiment;

FIG. 5 is a diagram illustrating a configuration example of a transmission destination table according to a second embodiment;

FIG. 6 is a diagram illustrating a configuration example of a line speed table according to the second embodiment;

FIG. 7 is a diagram illustrating a configuration example of stored communication information according to a second embodiment;

FIG. 8 is a diagram illustrating a connection example of data communication via a conventional provider.

[Explanation of symbols]

13, 34 Communication monitoring unit (information acquisition unit) 14, 35 Communication information storage unit (information storage unit) 15 Connection destination information storage unit (charging information storage unit) 16, 37 Connection destination selection unit (determination unit) 17 Dial information creation Units 18, 38 Dial information sending unit 19, 39 Selection condition setting unit 20, 40 Application 21 Other terminal 30 Communication terminal (data communication device) 311 to 31k Line interface unit (line interface means) 32 Interface switching unit (selection means) 36 Charging table (charging information storage means)

Claims (14)

[Claims] 1. A data communication device using dial-up, comprising: information acquisition means for acquiring, as communication information, a transmission speed obtained from an amount of communication data to be transmitted and received and a communication time;
Information storage means for storing the communication information obtained by the information obtaining means, connection determining means for determining a connection destination based on the communication information, and dial means for creating and transmitting dial information based on the information determined by the connection determining means A data communication device comprising: 2. The information acquisition means for acquiring communication time as communication information, comprising charging information storage means for storing a telephone number and a charging system for each connection destination as charging information, 2. The data communication apparatus according to claim 1, wherein the connection destination is determined based on the communication information and the billing information. 3. The data communication apparatus according to claim 2, further comprising condition selecting means for selecting a priority condition when the connection determining means determines a connection destination. 4. The connection determining means, wherein the condition selecting means selects a communication cost as the priority condition.
A connection destination is determined based on a fee charged when a connection is made during a period depending on at least one of an average value, a median value, and a mode value of past communication times for each connection. The data communication device according to claim 3. 5. The connection determining means determines that a connection destination is determined based on an average transmission speed of each past connection destination when the condition selection means selects a communication speed as the priority condition. 4. The data communication device according to claim 3, wherein: 6. A data communication apparatus utilizing dial-up, comprising: a plurality of line interface means for connecting a line; and information acquisition means for acquiring, as communication information, a transmission rate obtained from an amount of communication data to be transmitted and received and a communication time. Information storage means for storing the communication information acquired by the information acquisition means, and a billing information storage for storing, as billing information, a billing system for each connection destination and a charge for connecting to the connection destination using a line. Means, connection determining means for determining a connection destination based on the communication information and the charging information, selecting means for selecting the line interface means to be used for connection based on the information determined by the connection determining means, and the connection determining means Dialing means for creating and sending dial information based on the information determined by Over data communication apparatus. 7. The information storage unit includes a history information storage unit that stores a history of data transmission performed in the past as history information, and the connection determination unit determines a connection destination based on the history information. 7. The method according to claim 6, wherein
A data communication device as described. 8. The history information storage means, for each connection destination,
At least one of a time when a connection for communication is started, a time when a connection is ended, an amount of communication data transmitted and received during the connection, dial information, and a used line interface is stored as history information. The data communication device according to claim 7, wherein the data communication device is provided. 9. A communication data amount designating unit for designating a communication data amount of data transmission, wherein the connection determining unit determines a connection destination based on the communication data amount of data transmission designated by the communication data amount designating unit. 7. The data communication device according to claim 6, wherein the data communication device is determined. 10. A communication data amount predicting unit for predicting a communication data amount of data transmission based on history information stored in the history information storing unit, wherein the connection determining unit predicts the communication data amount by the communication data amount predicting unit. 8. The data communication apparatus according to claim 7, wherein a connection destination is determined based on a communication data amount of data transmission. 11. A connection time specifying means for specifying a connection time for data transmission, wherein said connection determining means determines a connection destination based on a connection time for data transmission specified by said connection time specifying means. 7. The data communication device according to claim 6, wherein: 12. A connection time estimating means for estimating a connection time of data transmission based on history information stored in the history information storage means, wherein the connection determining means includes a connection time estimating means for estimating a data transmission time estimated by the connection time estimating means. The data communication apparatus according to claim 7, wherein a connection destination is determined based on a connection time. 13. A data communication device using a dial-up, wherein a data communication device transmits and receives a communication data amount and a transmission speed obtained from a communication time as communication information. Data communication device comprising: an information storage unit for storing the communication information obtained by the communication; a connection determination unit for determining a connection destination based on the communication information; and a dial unit for creating and transmitting dial information based on the information determined by the connection determination unit. A computer-readable recording medium having recorded thereon a program for causing it to function as an apparatus. 14. A computer, in a data communication device using dial-up, acquiring a plurality of line interface means for connecting lines, and a transmission rate obtained from an amount of communication data to be transmitted and received and a communication time as communication information. An information acquisition unit, an information storage unit for storing the communication information acquired by the information acquisition unit, and a charge system for each connection destination and a charge for connecting to the connection destination using a line are stored as charge information. Charging information storage means, connection determining means for determining a connection destination based on the communication information and the charging information, selecting means for selecting the line interface means to be used for connection based on the information determined by the connection determining means, Dial means for creating and sending dial information based on the information determined by the connection determining means. A computer-readable recording medium on which a program for functioning as a data communication device is recorded.