JPH0795703B2 - Line restoration confirmation method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Overview] The present invention relates to a line restoration confirmation method when a faulty leased line is restored in a modem with a built-in dial backup unit, and aims to reduce the time and effort required to restore the leased line. , Test instruction sending means for sending a test start instruction using a push button signal to the destination of the leased line via the exchange line, and a line for the leased line depending on the test start instruction sent from the test instruction sending means The line test means for performing the status test and the line status test result at the connection destination of the leased line using the push button signal are received via the exchange line, and the test result by the line test means is used by the push button signal. A test result communication means to be sent to the exchange line,
The test result received by the test result communication means and the test result by the line test means are introduced, and a line discriminating means for discriminating whether or not the dedicated line can be restored is provided.

[Industrial application field]

The present invention relates to a line restoration confirmation system, for example, a line restoration confirmation system when a faulty leased line is restored in a dial backup unit (hereinafter referred to as DBU) built-in modem.

[Conventional technology]

Generally, in a network constructed via a private line, when a failure occurs in the private line and communication becomes impossible, a communication line is temporarily used for communication using a public switched line. The device is a DBU.

For example, a terminal device such as a financial institution and a host computer installed in the center are connected via a dedicated line. When a failure occurs in the leased line, the incoming and outgoing calls can be made between the DBU built-in modems to form a detour by the switched line so that the data communication can be continued.

[Problems to be solved by the invention]

By the way, in the above-mentioned conventional method, there is a problem that it takes a lot of time to restore the dedicated line because the dedicated line is connected and the operation is checked by the manual operation after the failure of the dedicated line is removed. .

In particular, even if the leased line is temporarily out of service due to deterioration of the leased line, the entire system using the leased line will go down, and it is necessary to perform restoration work by manual operation each time. There was a demand for a method of performing a confirmation test to restore the leased line.

The present invention was created in view of the above point, and it is an object of the present invention to provide a line restoration confirmation system that reduces the time and effort required to restore a dedicated line.

[Means for solving problems]

FIG. 1 is a block diagram of the principle of the line restoration confirmation system of the present invention.

In the figure, test instruction sending means 111 in the line restoration confirmation system for restoring the leased line 181
Sends a test start instruction using a push button signal to the connection destination of the dedicated line 181 via the exchange line 191.

The line test means 121 tests the line state of the dedicated line 181 in response to the test start instruction sent from the test instruction sending means 111.

The test result communication means 131 receives the test result of the line state at the connection destination of the dedicated line 181 using the push button signal via the exchange line 191, and the test result in the line test means 121 using the push button signal. Switching line
Send to 191.

The line discriminating means 141 discriminates whether or not the leased line 181 can be restored by introducing the test result received by the test result communication means 131 and the test result by the line test means 121.

Therefore, as a whole, the line status of the dedicated line 181 is tested in accordance with the test start instruction sent from the test instruction sending unit 111, and the test result and line at the connection destination of the dedicated line 181 received by the test result communication unit 131 are tested. Test means 121
It is configured to determine whether or not the leased line 181 can be restored based on the test result in (1).

[Work]

When the dedicated line 181 in which a failure has occurred is to be restored, the test instruction sending means 111 sends a test start instruction using a push button signal via the exchange line 191. Line test method
121 tests the line state of the dedicated line 181 in response to the test start signal sent from the test instruction sending means 111, and the test result is connected to the dedicated line 181 from the test result communication means 131 using a push button signal. Send it out first. Further, the test result at the connection destination of the dedicated line 181 is received by the test result communication means 131. The line discriminating means 141 includes the test result received by the test result communication means 131 and the line testing means 121.
It is determined whether the leased line 181 is recoverable or not according to the test result in (1).

In the present invention, the test line sending means 111 to the leased line 1
A test start instruction using a push button signal is sent to the connection destination of 81 to test the line state of the dedicated line 181,
By determining whether or not the private line 181 can be restored according to the test result at the connection destination of the private line 181 received by the test result communication unit 131 and the test result at the line test unit 121, the private line 181 can be restored. Such trouble can be reduced.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 2 shows the configuration of an embodiment to which the line restoration confirmation system of the present invention is applied.

I. Correspondence between Embodiment and FIG. 1 Here, the correspondence between the embodiment of the present invention and FIG. 1 will be described.

The test instruction sending unit 111 corresponds to the DBU control unit 211 and the push button (PB) signal generation unit 213.

The line test means 121 corresponds to the modulation / demodulation unit 221, the line monitoring unit 223, and the modem control unit 241.

The test result communication means 131 includes a DBU control unit 211 and a PB signal generation unit 21.
3, which corresponds to the PB signal detection unit 231.

The line discriminating means 141 corresponds to the modem control section 241.

The dedicated line 181 corresponds to the dedicated line 281, the dedicated line 283.

Switching line 191, switching line 291, switching line 292, switching line 29
3, equivalent to the switching line 294.

An embodiment of the present invention will be described below on the basis of the above correspondence.

II. Configuration of the embodiment In FIG. 2, the modem 200 includes two dedicated lines 281,283.
Or 4 switched lines 2 connected by switch 299
It is connected to the modem 400 via 91,292,293,294.

The modem 200 includes a modem control unit 241 that controls the entire modem 200 and a modem unit 2 that modulates or demodulates data.
21, a dedicated line 281 or a line monitoring unit 223 that detects an abnormality in data communication via the dedicated line 283, and a modem 200
A dedicated line control unit 253 for controlling data exchange between the dedicated line and each dedicated line, and a DBU 210 for performing data communication via a switched line (switched line 291 etc.) when a failure (abnormality) occurs in each dedicated line. And a control communication unit 263 that controls the exchange of control signals between the modem control unit 241 and the DBU 210.

The DBU210 includes a DBU control unit 211 that controls the entire DBU210,
Create transmission data using push button signals
A PB signal generator 213, a PB signal detection signal 231 for detecting received data using a push button signal, and a modem 200
And a switching line control unit 251 for controlling the exchange of data with each switching line, and a control communication unit 261 for controlling the exchange of control signals between the DBU control unit 211 and the modem control unit 241.

The modem control unit 241 is connected to the modulation / demodulation unit 221, the line monitoring unit 223, the dedicated line control unit 253, and the control communication unit 263. The modulation / demodulation unit 221 includes a line monitoring unit 223, a dedicated line control unit 253, and a DB.
It is connected to the switching line control unit 251 in the U210.

Also, the DBU control unit 211 includes a PB signal generation unit 213 and a PB signal detection unit.
231 is connected to the switching line control unit 251 and the control communication unit 261. The PB signal generator 213 and the PB signal detector 231 are connected to the switched line controller 251. The control communication unit 261 is connected to the control communication unit 263.

The configuration of the modem 400 is similar to that of the modem 200, and detailed description thereof will be omitted.

The dedicated line control unit 253 of the modem 200 and the dedicated line control unit 453 of the modem 400 are connected via the dedicated circuit 281 and the dedicated line 283. Further, the switched line control unit 251 of the modem 200 and the switched line control unit 251 of the modem 400 are connected to the exchange 299.
Switched lines 291,292 and switched lines 293,2 connected by
Connected through 94.

When performing normal data communication, data output from a data powder device or the like (not shown) is modulated by the modulator / demodulator 221 and sent from the dedicated line controller 253 to the modem 400 side via the dedicated circuit 281. In addition, the data sent from the modem 400 side via the leased line 283 is the leased line control unit 2
It is supplied to the modulation / demodulation unit 221 via 53, demodulated and sent to the data terminal device or the like.

If the leased line 281 or leased line 283 fails,
The DBU 210 of the modem 200 makes a call to the DBU 410 of the modem 400 to establish a line connection (a call may be made from the modem 400 side). As a result, between the modem 200 and the modem 400, the switching lines 291 and 292 are connected as a detour of the dedicated line 281, and the switching lines 293 and 294 are connected as a detour of the dedicated line 283. After that, the data modulated by the modulator / demodulator 221 is
Modem from switching line control unit 251 via switching lines 291 and 292
It is sent to the 400 side. Further, the data received from the modem 400 side via the switching lines 293 and 294 is supplied from the switching line control unit 251 from the modulation / demodulation unit 221, and demodulated.

III. Operation of Embodiment Next, the operation of the line restoration confirmation method of the above-described embodiment of the present invention will be described.

FIG. 3 shows the operation procedure of the embodiment.

It is assumed that a failure has already occurred in the private line 281 or the private line 283, and data communication is being performed from the switched line control unit 251 via each switched line.

Now, consider a case where the modem 200 sends an instruction to the modem 400 to test the line status of each leased line, and the leased line is restored according to the result.

Hereinafter, FIG. 2 and FIG. 3 will be referred to.

The modem control unit 241 and the DBU control unit 211 determine the start of the test, and the DBU control unit 211 first sends an instruction to the PB signal generation unit 213. The PB signal generation unit 213 supplies a test start instruction signal using a push button signal to the switched line control unit 251. The exchange line control unit 251 sends the test start instruction signal supplied from the PB signal generation unit 213 to the modem 400 side via the exchange lines 291 and 292 (step 311).

Next, the modem control unit 241 switches the line used (step 312). When a failure occurs in the leased line, the data sent from the modulation / demodulation unit 221 is transferred to the switching line control unit 2
The one supplied to 51 is supplied from the modulator / demodulator 221 to the dedicated line controller 253 (the same applies to the received data).

At this time, the modem 400 side receives the test start instruction signal (push button signal) sent from the modem 200 side.
The PB signal detection unit 431 detects this, and the DBU control unit 411 notifies the modem control unit 441 of the start of the test. Modem control unit
The 441 switches the line used in response to the notification from the modem 400.

Next, the modem control unit 241 outputs monitoring data for checking the line status of the leased line 281, and the monitoring data is modulated by the modulation / demodulation unit 221 and sent to the leased line 281 via the leased line control unit 253. (Step 313).

Similarly, the leased line control unit 253 receives the monitoring data from the modem 400 side via the leased line 283. The monitoring data is demodulated by the modulation / demodulation unit 221, and the line monitoring unit 2
At 23, the signal quality is checked (step 314). The inspection result is supplied to the modem control unit 241.

Further, the modem control unit 241 supplies the inspection result supplied from the line monitoring unit 223 to the DBU control unit 211, and the DBU control unit 211 receives the PB
An instruction to send the inspection result is sent to the signal generator 213. The PB signal generator 213 creates a test result signal using the push button signal and sends it to the modem 400 side via the switching line controller 251 (step 315). At this time, the inspection result signal using the push button signal from the modem 400 side (dedicated line 281
Inspection result) is sent, so the PB signal detection unit
231 detects the inspection result signal and sends the inspection result from the DBU control unit 211 to the modem control unit 241.

Next, the modem control unit 241 sets two lines according to the inspection result of the signal quality by the line monitoring unit 223 (inspection result regarding the leased line 283) and the inspection result received from the modem 400 side (inspection result regarding the leased line 281). It is determined whether or not there is a failure in the dedicated line (step 316).

When the dedicated line 281 or the dedicated line 283 has a failure (when the failure continues), the modem control unit 241
Switch the used line to the switched line again (step 31
7) End the leased line restoration process.

When the maintenance staff removes the fault, or when the fault is caused by a temporary factor and the temporary factor is released, the modem control unit 241 makes a negative determination in step 316. The modem control unit 241 sends an instruction to the DBU control unit 211, and the DBU control unit 211 exchanges lines 291,294 with the modem 400.
Is disconnected (step 318), and the leased line restoration processing is terminated.

IV. Summary of Examples In this way, when performing the recovery processing of the leased line, first,
The PB signal generator 213 creates a test start instruction signal using a push button signal and sends it to the modem 400 side.
Next, the line monitoring unit 223 of the modem 200 and the line monitoring unit 423 of the modem 400 inspect the signal quality of the dedicated lines 281 and 283, and receive the inspection result of the modem 400 side using a push button signal. The modem control unit 241 determines whether or not there is a failure in the leased line 281 and the leased line 283 according to the inspection result in the line monitoring unit 223 and the inspection result received from the modem 400 side. When the cause of the failure is removed, the private line 281 and the private line 283 are restored.

Therefore, it is possible to reduce the time and effort required to restore the dedicated line by transmitting the test start instruction of the line state by using the push button signal and exchanging the inspection result to restore the dedicated line.

In addition, when a failure occurs in the leased line 281 or the leased line 283, the restoration process of the leased line shown in the embodiment is performed at a predetermined time interval (the time interval does not need to be constant) to temporarily It is possible to shorten the usage time of the switching line due to a failure or the like, which also has the effect of shortening the line usage fee.

V. Modified Embodiment of the Invention Although the correspondence between the present invention and the embodiment has been described in “I. Correspondence between Embodiment and FIG. 1”, the present invention is not limited to this. Those skilled in the art can easily infer that the invention has various modifications.

〔The invention's effect〕

As described above, according to the present invention, the test instruction sending means sends the test start instruction using the push button signal to the connection destination of the leased line to test the line state of the leased line. Since it is possible to determine whether or not the dedicated line can be restored according to the test result at the connection destination of the dedicated line and the test result obtained by the line test means received in step 3, the time and effort required to restore the dedicated line can be reduced. , Practically extremely useful.

[Brief description of drawings]

FIG. 1 is a block diagram of the principle of the line restoration confirmation system of the present invention, FIG. 2 is a block diagram of an embodiment to which the line restoration confirmation system of the present invention is applied, and FIG. 3 is an operation explanatory diagram of the embodiment. In the figure, 111 is a test instruction sending means, 121 is a line test means, 131 is a test result communication means, 141 is a line discriminating means, 181 is a dedicated line, 191 is a switched line, 200,400 is a modem, 210,410 is a DBU, 211,411 is a DBU. Control unit, 213,413 PB signal generation unit, 221,421 modulation / demodulation unit, 223,423 line monitoring unit, 231,431 PB signal detection unit, 241,441 modem control unit, 251,451 switched line control unit, 253,453 dedicated line control unit, 261,263,461,463 It is a control communication unit.

Claims (1)

[Claims] 1. A line recovery confirmation method for recovering a faulty leased line (181), wherein a push button signal is used for a destination of the leased line (181) via a switching line (191). Test instruction sending means (111) for sending a test start instruction, and line test means for testing the line status of the dedicated line (181) in response to the test start instruction sent from the test instruction sending means (111). (121) and a line state test result at the connection destination of the dedicated line (181) using a push button signal via the exchange line (191), and the line test means (121).
In the line test means (121), the test result communication means (131) for sending the test result in (1) to the exchange line (191) using a push button signal, the test result received by the test result communication means (131) A line restoration confirmation system characterized by comprising a line discriminating means (141) for discriminating whether or not the dedicated line (181) can be restored by introducing a test result.