JPH0440054A - Data transmission equipment with dial backup function - Google Patents

Abstract

PURPOSE:To economize the charge of using a public line by previously setting the period of not executing data communication to a calendar timer part and stopping a dial backup function during the set period. CONSTITUTION:A calendar timer part 13 is provided to previously set the Sunday and the time zone, at least, of not executing dial backup or data communication, and a line monitor part 16 is provided to monitor the state of a leased line 3. When the line fault of a leased line 2 is generated, a control means 12 executes control according to the set information of the calendar timer part 13 not so as to switch connection from the leased line 2 to the public line 3. Thus, it is possible to cancel the improper loading of the communication charge even in the case of not executing the data communication by executing the dial backup in the public line 3 even in the time zone not actually executing the data communication.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a data transmission device with a dial backup function that can be connected to a private line and a public line.

[Conventional technology]

Conventional data transmission equipment with a dial backup function detects alarms, checks the status of the leased line using the monitor function, and isolates faults using the test function. If deterioration is confirmed beyond the specified threshold and a fault occurs,
The system was equipped with monitoring means to constantly monitor the line quality of the dedicated line in order to automatically switch from the dedicated line to the public line in order to immediately secure a backup route for the communication line.

[Problem to be solved by the invention]

In the conventional data transmission equipment with a dial backup function described above, the quality of the dedicated line is constantly monitored, and if quality deterioration occurs or a failure occurs, the backup route is always changed to the public line. Even when data communication is not being performed, dial backup is performed on the public line, so there is a drawback that communication charges are incurred even when data communication is not being performed.

[Means to solve the problem]

The data transmission device with a dial backup function of the present invention is a data transmission device with a dial backup function that can be connected to a dedicated line and a public line, and has a calendar that presets at least 9 hours on Sundays in which dial backup is not performed or data communication is not performed. comprising a clock section and a line monitoring section that monitors the state of the dedicated line,
The apparatus includes a control means that does not switch the connection from the private line to the public line based on setting information of the calendar clock section when a line failure occurs in the private line.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention.

In FIG. 1, a modem 1 serving as a data transmission device with a dial backup function of this embodiment has a dedicated line 2.
a modem unit 11 that connects to the public line 3 and modulates and demodulates transmitted and received signals; a quality measurement unit 16 that has a status monitoring and testing function for the dedicated line 2; and a network control unit that interfaces with the public line 3 and has a dial signal sending function. 15, a line switching unit 14 that switches between connecting the modulation and demodulation unit 11 to the dedicated line 2 and the public line 3, and days when dial backup of the modulation and demodulation device 1 is not performed or data communication is not performed; A calendar clock section 13 in which nine time zones are set in advance for each day of the week, and a control section 12 that controls the entire modem 1
It is composed of:

Next, the operation of this embodiment will be explained.

First, the user of this embodiment sets a period during which dial backup will not be performed using the calendar clock section 13.

Next, if the quality measurement unit 16 constantly monitors the dedicated line 2 and a failure occurs in the dedicated line 2, the quality measurement unit 16 notifies the control unit 12, and the control unit 12 then monitors the calendar clock unit 13. Check whether dial backup is necessary, and if dial backup is necessary, switch line switching unit 1.
4 and network control unit 15 to connect the used line to the public line 3. However, if dial backup is unnecessary, the control unit 12 does not switch the connection to the public line 3.

〔Effect of the invention〕

As explained above, in the present invention, a period (day, day of the week, one hour period) during which no data communication is performed is established in advance in the calendar clock section, and the dial backup function is stopped during the set period. This has the effect of saving on public line usage charges.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention. line, 4 switching network, 11... modem unit, 12... control unit, 13... calendar clock unit, 14... line switching unit, 15... control member, 16... quality measurement unit .

Claims (1)

[Claims] In a data transmission device with a dial backup function that can be connected to a dedicated line and a public line, at least on Sundays when dial backup is not performed or data communication is not performed, a calendar clock unit that presets the time zone and the status of the dedicated line are monitored. a line monitoring section, and a dial characterized in that it has a control means that does not switch the connection from the private line to the public line based on the setting information of the calendar clock section when a line failure of the private line occurs. Data transmission device with backup function.