JP2000041080A - Terminal adapter remote test method - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To remotely test a terminal adapter for connecting a data terminal device to a communication line, even if the data terminal device or the loop connector is not connected to the terminal adapter, via the communication line. It is an object of the present invention to provide a remote test method capable of performing a test during the test. SOLUTION: One terminal adapter 2a performs a test activation to the other terminal adapter 2b via a communication line 3, and the other terminal adapter receives the test activation and returns data received from the communication line to the communication line. A process in which one terminal adapter transmits test data to the other terminal adapter via a communication line, and a process in which the test data transmitted by one terminal adapter and the other terminal adapter are folded back. It is determined whether or not the incoming test data has the same contents and whether or not communication can be normally performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a remote test method for a terminal adapter for connecting a data terminal device to a communication line.

[0002]

2. Description of the Related Art Conventionally, to test whether a terminal adapter can normally communicate with a partner terminal adapter via a communication line, a loop connector is connected to a connection part of the partner terminal adapter on the data terminal device side. Is connected and communicating.

[0005] Then, test data is transmitted from the data terminal device of the own terminal adapter, and it is determined whether or not the test data is looped back from the loop connector of the terminal adapter to be connected and correctly received by the data terminal device of the own terminal adapter. I was going to check.

[0004]

In the above-mentioned prior art, since a loop connector must be connected to the connection part of the terminal adapter of the connection partner on the data terminal device side, a loop connector and a loop connector are connected to the terminal adapter of the partner. It was necessary to have a worker to attach and remove the unit.

The present invention has been made to solve such a conventional problem. Even if a data terminal device and a loop connector are not connected to both terminal adapters for communication, the present invention is applied to a communication line. It is an object of the present invention to provide a terminal adapter remote test method that can confirm whether communication between terminal adapters is normally performed.

[0006]

According to the first aspect of the present invention, there is provided a process in which one terminal adapter performs a test start to another terminal adapter via a communication line, and the other terminal adapter receives a test start. Forming an internal loop so that data received from the communication line is looped back to the communication line, transmitting test data to one terminal adapter via the communication line to the other terminal adapter, The process comprises checking whether the transmitted test data and the test data looped back by the other terminal adapter have the same contents and determines whether normal communication is possible.

According to the present invention, even if the data terminal device or the loop connector is not connected to the data terminal device connection portion of one terminal adapter and the data terminal device connection portion of the other terminal adapter, the connection is established via the communication line. It is possible to confirm whether communication between terminal adapters is normally performed.

[0008] The invention described in claim 2 of the present invention is claimed in claim 1.
In the invention described above, when the other terminal adapter does not receive the test data for a certain period of time, it determines that there is an abnormality, cancels the internal loop, returns to the communication state, and sets the test end state.

According to the present invention, even if the test termination from one terminal adapter is not performed normally, the test on the other terminal adapter can be terminated. ,
The other terminal adapter remains in the test state,
It is not impossible to return to the communication state.

The third aspect of the present invention is the first aspect of the present invention.
In the invention described above, one terminal adapter displays the number of test successes and the reason for failure on the display means based on the result of the determination processing.

According to the present invention, the result of the determination processing is displayed on the display means, so that the cause of the inability to connect normally can be immediately determined.

[0012]

FIG. 1 is a block diagram of a communication system to which the present invention is applied.
1A and 1B show a state where they are connected to a high-speed digital dedicated line (HSD) 3 via terminal adapters 2a and 2b.

The terminal adapters 2a and 2b are DTE1
This is a device for converting the input / output interfaces a and 1b into the interface of the HSD3, and has functions such as speed conversion, protocol conversion, and signal format conversion.

FIG. 2 is a functional block diagram of the terminal adapters 2a and 2b, and comprises a key operation unit 21, a DTE control unit 22, a status display unit 23, and a line control unit 24.

The key operation unit 21 controls input key data, and is logically connected to the DTE control unit 22. D
The TE controller 22 has a function of interfacing with the DTEs 1a and 1b and a function of controlling data transmission / reception to the HSD 3 side, and is logically connected to the key operation unit 21, the status display unit 23, and the line control unit 24. It is connected.

The status display unit 23 controls the status display, and is logically connected to the DTE control unit 22. The line control unit 24 has a function of interfacing with the HSD 3, has a function of performing processing such as a connection request to the HSD 3, and is logically connected to the DTE control unit 22.

Next, referring to the sequence diagram shown in FIG. 3, the display contents diagram of the status display unit 23 shown in FIG. 4, and the diagrams showing the data paths inside the terminal adapter shown in FIGS. A description will be given of an operation procedure until a return test of the remote data is performed and the test ends normally.

First, in the communication state (step S
1) The data paths inside the terminal adapters 2a and 2b are in the state shown in FIG. 5, and the data received from the DTEs 1a and 1b is transmitted to the HSD 3, and the data received from the HSD 3 is transmitted to the DTEs 1a and 1b. It has become. In addition, the status display unit 23 displays “COMPLETED 48” shown in FIG. 4B, indicating that communication is being performed. “48” is a communication speed.

In this state, if a remote data return test start operation is performed by operating the keys of the terminal adapter 2a (step S2), the status display section 23 changes to a display "Synthesis Remote Loop" shown in FIG. Indicates that the remote data return test has been started.

Then, the terminal adapter 2a switches the internal data path to the state shown in FIG. That is, the terminal adapter 2a switches the data to be transmitted to the DTE 1a to the data of the mark 71, activates the transmission / reception circuit 72, and transmits a test start command to the terminal adapter 2b via the HSD 3 (Step S).
3).

When the terminal adapter 2b receives the test start command in the data transmission / reception circuit 72, the status display section 23 changes to the display "Loop Sen 48" shown in FIG. 4C, and the data return test is started remotely from the communication state. Indicates that it was done.

Next, the terminal adapter 2b switches the internal data path to the state shown in FIG. That is, the terminal adapter 2b switches the data to be transmitted to the DTE 1b to the data of the mark 71, activates the transmission / reception circuit 72, and transmits a test start response to the terminal adapter 2a via the HSD 3 (step S4).

Further, after transmitting the test start response, the terminal adapter 2b switches the data path to the state shown in FIG. 7, and the data received from the HSD 3
Create a route to return to (Step S
5).

When receiving the test start response, the terminal adapter 2a transmits test data to the terminal adapter 2b via the HSD 3 (Step S6).
This test data is looped back in the terminal adapter 2b and transmitted to the terminal adapter 2a via the HSD 3 (Step S7).

The terminal adapter 2a checks whether or not the returned test data has the same contents as the transmitted test data.
The display shown in FIG.
1 "indicates that the return of the test data has succeeded once.

Thereafter, the test data is transmitted again (step S8). If the test data is normally turned back (step S9), the test data displayed on the status display unit 23 is displayed as shown in FIG.
The number of successful tests in (e) is updated, and this operation is repeated thereafter. By the above operation, the return test of the remote data is performed.

Next, the end of the remote data return test will be described. When the end operation of the remote data return test is performed by operating the key of the terminal adapter 2a (step S10), the terminal adapter 2a sets the HSD.
Then, a test end command is transmitted to the terminal adapter 2b via the terminal 3 (step S11).

When receiving the test end command, the terminal adapter 2b switches the internal data path to the state shown in FIG.
A test end response is transmitted to a (step S1).
2).

After transmitting the test end response, the terminal adapter 2b switches the internal data path to the state shown in FIG.
b, the data to be transmitted is switched to the data received from the HSD3. Then, the state display unit 23 is changed to the display “COMPLETED 48” shown in FIG. 4B to indicate the communication state and return to the communication state.

Upon receiving the test end response (step S12), the terminal adapter 2a switches the internal data path to the state shown in FIG. As a result, the data transmitted from the terminal adapter 2a to the DTE 1a is switched to the data received from the HSD 3.

In the terminal adapter 2a, the status display section 23 is changed to the display "COMPLETED 48" shown in FIG. 4B to indicate the communication state and return to the communication state. As a result, both the terminal adapters 2a and 2b return to the state before the execution of the remote data return test (step S13).

Although the normal operation has been described so far,
Next, a case where the test is not started normally or a case where the test fails while the test is running normally will be described.
Reason when the test is not started normally and status display part 2
FIG. 8 shows the reason display contents displayed in FIG. Also, the reason why the test fails during normal execution and the status display unit 23
FIG. 9 shows the contents of the reason display displayed in FIG.

In FIG. 8, the display when layer 1 is not established is "L1", and the display when synchronization is not established is "LOS".
S ", the display at the time of in-band disconnection is" IN-B ", and the display when there is no test start response response to the test start command is" NO-A ".

In FIG. 9, when the layer 1 is not established, the display is "L1", and when the synchronization is lost, the display is "LO".
SS ", the display for in-band disconnection is" IN-B ",
When the test data reception is abnormal or not received, the display is "DA
TA ".

FIG. 8 shows the contents applied only to the terminal adapter 2a for performing the test starting operation.
Is the content applied to both terminal adapters 2a and 2b. That is, during the execution of the remote data return test, the terminal adapter 2b checks whether the test is normally performed in the same manner as the terminal adapter 2a.

This is because if the test fails, the terminal adapter 2b cannot end the test by receiving the test end command, and thus ends the test upon detecting a test failure.

Next, with reference to a sequence diagram shown in FIG. 10, an operation procedure when the remote data return test is not started normally due to a line abnormality will be described. When the layer 1 is not established due to the line abnormality, the terminal adapter 2a repeatedly starts the layer 1 for the HSD 3 (steps S21 to S23). In this state, the status display unit 23 displays the display “Hassin” shown in FIG. 4A, indicating that the line connection operation is being performed.

Here, when the remote data return test start operation is performed by key operation of the terminal adapter 2a (step S24), the layer 1 is not established because the test is not enabled (step S25), and the status display unit 23 Indicates the test failure remote loop NG L1 shown in FIG. 4F, indicates the reason for the test failure (step S26), and waits for a test end operation. Here, since the communication state is not established due to the lack of the layer 1, the test failure reason is displayed as "L1".

Here, when a test end operation is performed by key operation of the terminal adapter 2a (step S27),
The test ends. Then, the status display unit 23
The display "Hassin" shown in (a) indicates that the line connection operation is being performed, and layer 1 activation is repeatedly performed on the HSD 3 (steps S28 to S30). Then, the state returns to the state before the execution of the remote data return test.

Next, an operation procedure when a test fails during the remote data return test will be described with reference to a sequence diagram shown in FIG.

When the terminal adapter 2a is disconnected from the HSD 3 by layer 1 during the normal execution of the remote data return test (steps S1 to S7) (step S3).
1), the status display section 23 displays the message “North Korea Remote Loop OK34 NG L1” shown in FIG. 4G (step S32), and waits for a test end operation after indicating the reason for the test failure. In the display shown in FIG. 4G, the reason for failure “L1” is displayed with the number of test successes “34” remaining, so that it is necessary to identify whether the test failed from the beginning or failed in the middle. Is possible.

Here, when a test end operation is performed by a key operation of the terminal adapter 2a (step S33),
The test ends. Then, the status display unit 23
The display "Hassin" shown in (a) indicates that the line connection operation is being performed, and the layer 1 is activated (step S3).
4) After the layer 1 is established (step S35), the state returns to the normal communication state (step S36).

On the other hand, after receiving the test data (step S6), the terminal adapter 2b switches the internal data path to the state shown in FIG. 5 (step S37) because the next test data is not received within a predetermined time. Thereby, the data transmitted from the terminal adapter 2b to the DTE 1b is switched to the reception data of the HSD3. Then, the state display unit 23 is changed to the display “COMPLETED 48” shown in FIG. 4B to indicate the communication state and return to the communication state.

As described above, even if the test from the terminal adapter 2a is not normally completed, the test on the terminal adapter 2b can be completed. Therefore, even though the terminal adapter 2a has completed the test, the terminal adapter 2b does not remain in the test state and cannot return to the communication state.

[0045]

According to the present invention, even if the data terminal device and the loop connector are not connected to the data terminal device connection portion of the own terminal adapter and the data terminal device connection portion of the partner terminal adapter, the communication line is used. It is possible to confirm whether or not communication between the terminal adapters is normally performed, and an advantageous effect that an operator on the partner terminal adapter side becomes unnecessary is obtained.

Further, according to the present invention, the result of the judgment processing is displayed on the status display unit, so that the cause of a failure in normal connection can be immediately determined, thereby providing a highly convenient test environment. The advantageous effect that it can be obtained is obtained.

[Brief description of the drawings]

FIG. 1 is a block diagram of a communication system to which the present invention is applied.

FIG. 2 is a functional block diagram of a terminal adapter.

FIG. 3 is a sequence diagram showing an operation procedure until a test ends normally.

FIG. 4 is a diagram showing display contents of a state display unit.

FIG. 5 is a diagram showing a data path inside a terminal adapter.

FIG. 6 is a diagram showing a data path inside a terminal adapter.

FIG. 7 is a diagram showing a data path inside a terminal adapter.

FIG. 8 is a diagram showing the reason when the test is not started normally and the contents of the reason displayed on the status display unit.

FIG. 9 is a diagram showing a reason when a test fails during normal execution of a test and a reason displayed on a status display unit.

FIG. 10 is a sequence diagram showing an operation procedure when a test is not started normally.

FIG. 11 is a sequence diagram illustrating an operation procedure when a test fails during normal execution of a test.

[Explanation of symbols]

 1a, 1b Data terminal equipment (DTE) 2a, 2b Terminal adapter 3 High-speed digital leased line (HSD) 21 Key operation unit 22 DTE control unit 23 Status display unit 24 Line control unit

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Satoru Satoh 94, Kojiyama-shi, Fukushima Prefecture, Fukushima Prefecture F-Term (reference) 5K035 AA07 BB01 CC08 CC10 DD01 EE02 GG02 GG09 GG10 KK04

Claims (3)

[Claims] 1. A process in which one terminal adapter performs a test start to another terminal adapter via a communication line, and the other terminal adapter receives the test start and transmits data received from the communication line to the communication line. A process of forming an inner loop so as to loop back, a process of the one terminal adapter transmitting test data to the other terminal adapter via the communication line, and a process of transmitting the test data transmitted by the one terminal adapter and the A terminal adapter remote test method comprising: confirming whether or not the test data returned by the other terminal adapter has the same content and determining whether normal communication can be performed. 2. If the other terminal adapter does not receive the test data for a certain period of time, it determines that there is an abnormality, cancels the inner loop, returns to a communication state, and sets a test end state. 2. The remote test method for a terminal adapter according to claim 1, wherein 3. The terminal adapter remote testing method according to claim 1, wherein said one terminal adapter displays the number of test successes and the reason for failure on the display means based on the result of the determination processing.