JPH04133537A - Data transmitter - Google Patents

Abstract

PURPOSE:To provide customers with timely service by providing a clock means which stores the utilizing time to each communication partner in a data base in a state where the time is correlated with the name and password of the partners and indicates the current time and checking the utilizing time of each communication partner in accordance with incoming calls, and then, permitting data communication with the communication partner having coincident utilizing time. CONSTITUTION:When terminal equipment(DTE) 17 receives data, name transmission 104 is performed and the data transmitter (DCE) 16 of a main station(MS) 11 performs response transmission 105 in response to the transmission 104. On the other hand, the security controlling section (SQC) 4 of the MS 11 retrieves the received name in a data base (DTB) 5 and transmits 106 a password requesting command. Then the SQC 4 checks the utilizing time corresponding to the retrieved name and password and, when the utilizing time coincides with the current time indicated by a real time clock(RTC) 6, the SQC 4 discriminates that data communication must be permitted and controls a network controlling section (NCU) 2 to open and disconnect 110 a line after transmitting 109 that a call back is performed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a data transmission device having a function of keeping communication contents confidential.

[Conventional technology]

In general, a data transmission device equipped with a confidentiality function is equipped with a network control unit that accommodates a transmission line, connects and disconnects from the line, and is equipped with a modulation and demodulation unit that modulates and demodulates transmitted and received signals via the network control unit. Furthermore, in order to confirm whether the communication destination is registered in advance, the name and password of the communication destination are stored in a database in memory, and the database is updated by the control means in response to an incoming call. Only when the searched and received name and password exist in the database, data communication with the corresponding communication destination is allowed.
At this time, the transmission line is temporarily disconnected, a callback is made to the communication destination, and data communication is started in response to the communication destination's response.

On the other hand, if either the received name or password does not exist in the database, the transmission line will be disconnected, no callback will be made, and data communication with the destination will be refused. .

[Problem to be solved by the invention]

However, in the past, processes such as database searches and callbacks were performed in response to incoming calls regardless of the time of day, so if incoming calls were concentrated during a specific time period, response processing would become congested, and each communication destination would be overwhelmed. Some of them have the drawback that the start of data communication is delayed, making it impossible to provide timely services.

[Means to solve the problem]

The present invention is constructed by the following means.

That is, the data transmission device described above has a database that stores the usage time of each of the five communication destinations in correspondence with names and passwords, a timekeeping means that indicates the current time, and a data transmission device that uses the data transmission device according to the name and password received in response to an incoming call from the communication destination. The control means checks the usage time of the communication destination and allows data communication with the communication destination only when the time coincides with the current time indicated by the clock means.

[For production]

Therefore, by setting a permissible communication time for each communication destination and storing it in the database as a usage time, it is possible to match the usage time of the communication destination with the current time in response to an incoming call.
Mismatches can be confirmed, and communication is permitted only when they match, which eliminates response processing congestion.

〔Example〕

Hereinafter, the present invention will be explained in detail with reference to figures showing examples.

FIG. 1 is a block diagram showing the main parts of the present invention, in which a network control unit (hereinafter referred to as NC
A modulation/demodulation section (hereinafter referred to as MDM) 3 performs the modulation and demodulation of the transmitted and received signals via this. is the security control section (
A 5QC (hereinafter referred to as 5QC) 4 is connected, and various controls are performed by a microprocessor therein.

In addition, 5QC4 has a database (hereinafter referred to as DTB) 5.5 that stores in memory the names and passwords of each communication destination, and the corresponding usage times. and a real-time clock (hereinafter referred to as RTC) using a counter etc.
)6 is attached as a timekeeping means, and the 5QC4 searches for or checks these and performs various controls in response to incoming calls.

Note that the input/output cuff of the 5QC4 on the opposite side to the MDM 3 is connected to a terminal device (hereinafter referred to as DTE) that is omitted from the top of Figure 1.

FIG. 2 is a block diagram showing the entire configuration. A main station (hereinafter referred to as MS) 11 including each part shown in FIG. In the MSll, the line from the network 13 is connected by a transmission unit (hereinafter referred to as 5) that includes each part shown in FIG.
A DTEL 5 is provided via this, and the 5R14 is attached with the DTB5 and RTC6 shown in FIG. It is configured.

In addition, 5S12 is DTEl7, NCU and MDM
A normal DCEl 8 consisting of
Go to 8! /413 is accommodated.

Figure 3 shows that in response to an incoming call from 8812 to MSII, M
It is a sequence diagram showing the transmission and reception status of various signals carried out under the initiative of SII, and when DCE 18 makes a dial call 101 to MS11 in response to activation of DTEL 7 of 5S12, 1M811 side responds to the incoming call according to this. The line is acquired and connected, thereby configuring the transmission path 102 between the two stations.

Next, MSII transmits a name request command 103 under the control of 5QC4, which is sent to DCEl of 5S12.
8, a name transmission 104 is made and, in response, the MSII's DCEl 6
While the response transmission 105 is performed from the MSII 5Q
The name received by the C4 is searched in the DTB5, and if the name exists, a password request command is transmitted 106.

In response, DTE 17 sends a password 107
When the password is received, the DCEl6 sends a response 108 in response to this, and the 5QC4 of the DCEl6 searches the DTB5 in the same way as described above, and if the received password exists there, further.

It checks the usage time corresponding to the searched name and password, and if this time and the current time indicated by the RTC 6 match, it determines that data communication should be allowed, and sends a message 109 indicating that a callback will be made. , 5QC
4 controls the NCU 2 to open and disconnect the line 110.

Next, based on the name and password received by 5QC4, 1M5II reads out the subscriber number of the destination previously stored in DTB5, performs a dial-back call 111 based on this, and both stations follow the response from the other party. Perform line configuration 112 between the two.

Therefore, this enables data transmission 113 from DTEl 7 via DCE 18 of 8812,
This is received by the DTE 15 via the MSll's DCEl6.

In response to the above, if either the name or password received at MSII does not exist, or even if they exist, the time of use and the current time do not match, the 5QC4 will determine that communication will not be permitted. was done, and N.
The line is opened and disconnected by the CU2.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, the usage time of each communication destination is stored in the database in correspondence with the name and password, and a timekeeping means is provided to indicate the current time, and the control means is used to The usage time of the communication destination is checked according to the received name and password, and data communication with the communication destination is only allowed when the time matches the current time indicated by the timer, so incoming calls outside the usage time are processed as responses. is omitted, the processing time required for this is shortened, and communication is quickly permitted for communication destinations whose usage time matches the current time, making it possible to provide timely services, making it suitable for various uses. A remarkable effect can be obtained in data transmission.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention; FIG. 1 is a block diagram of the main parts, FIG. 2 is a block diagram of the entire configuration, and FIG. 3 is a sequence diagram showing the transmission and reception status of various signals. 1...Transmission line, 2...Network control unit, 3...
Modulation/demodulation unit, 4...Security control unit, 5...
Database, 6...Real time clock. Figure 1 Figure 2 Patent applicant Japanese type (8 Co., Ltd. Ma MS

Claims (1)

[Claims] A network control unit that accommodates a transmission line and connects and disconnects from this line, a modulation/demodulation unit that modulates and demodulates the transmitted and received signals via this network control unit, a database that stores names and passwords of communication destinations, and a communication In a data transmission device, the data transmission device includes a control means that searches the database in response to an incoming call from the communication destination, and allows data communication with the communication destination when the received name and password exist in the database, the usage time of each communication destination; the database storing information in correspondence with names and passwords; a timekeeping means for indicating the current time; and a timekeeping means for checking the usage time of the communication destination according to the name and password received in response to an incoming call from the communication destination. and the control means that permits data communication with the communication destination only when the time coincides with the current time shown.