JPH11298604A - Circuit test method between private branch exchanges - Google Patents

Abstract

(57) [Problem] To provide a circuit test method between a plurality of private branch exchanges, and particularly to a circuit test method capable of performing a test without hindering communication. An object of the present invention is to provide a line test method between private branch exchanges, which can perform a test without any trouble in communication between data terminals. SOLUTION: There are provided a plurality of private branch exchanges 1 and 2 for accommodating and connecting data terminals 4 and 5, and a plurality of lines 3a and 3b for connecting a plurality of private branch exchanges. The other private branch exchange 2 returns the test pattern to the spare line 3b, and the other private branch exchange detects the folded test pattern from the spare line 3b and tests the line 3a to be tested. A signal delay is measured or a connection test is performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a line test method between a plurality of private branch exchanges connected by a dedicated digital line, and more particularly to a line test method capable of performing a test without hindering communication.

[0002]

2. Description of the Related Art FIG. 7 is a block diagram of a private branch exchange system for explaining a conventional line test method. This system includes a private branch exchange 101, a private branch exchange 102 connected to the private branch exchange 101, and a private branch exchange 10
A line 103 connecting the terminals 1 and 102, a private branch exchange 101
Has a data terminal 104 connected to the private branch exchange 102, and a data terminal 105 connected to the private branch exchange 102.
The line 102 has line controllers 113 and 123 connected to the line 103 and having a test function.

[0003] The private branch exchange 101 is connected to the data terminal 10.
By fixedly assigning the transmission path No. 4 to the HW of the line control device 113, a user using the data terminal 104 can perform data communication without being aware of the connection method.

When testing whether or not the line 103 is normally connected, the line controller 11 is connected as shown by a broken line.
At the connection point between the terminal 3 and the line 103, the data from the data terminals 104 and 105 is looped back as indicated by the broken line, and the data transmitted from the data terminal 104 or the data transmitted from the data terminal 105 is normally transmitted to the respective terminals. Upon returning, the line 103 can be confirmed to be normal.

[0005]

However, in the above-mentioned prior art, since the test is performed by returning the data sent to the line 103 as it is, it is necessary to cut the path between the data terminals 104 and 105 for the test.

For this reason, it is confirmed by monitoring the communication data whether or not the line to be tested is in use, and after confirming that the line is vacant, switching is performed, or the user of the data terminals 104 and 105 is notified. It is necessary to notify the user that the test is to be performed and temporarily stop data communication.

The present invention has been made to solve such a conventional problem, and an object of the present invention is to provide a line test method between private branch exchanges which can perform a test without interfering with communication between data terminals. And

[0008]

The invention according to claim 1 of the present invention comprises a plurality of private branch exchanges accommodating and connecting data terminals, and a plurality of lines connecting a plurality of private branch exchanges. The exchange sends a test pattern to the line to be tested in the line, the other private branch exchange returns the test pattern to the spare line, and one private branch exchange detects the test pattern folded from the spare line. This is a line test method between private branch exchanges for measuring a signal delay or a connection test on a line to be tested.

According to the present invention, a test pattern transmitted from one private branch exchange to a line to be tested is looped back using another free line set as a spare line on the other private branch exchange, and one private branch exchange is returned. By checking whether the test pattern transmitted from the exchange and the returned test pattern are the same, a line test can be performed without affecting communication.

[0010] The invention according to claim 2 of the present invention comprises a plurality of private branch exchanges for accommodating and connecting data terminals and a plurality of lines for connecting a plurality of private branch exchanges, and one of the private branch exchanges has its own accommodation connection. The communication data sent from the data terminal to the working line is sampled, the other private branch exchange returns the communication data to the spare line, and the one private branch exchange detects the sampled data returned from the spare line and operates. This is a line test method between private branch exchanges that performs signal delay measurement or connection test on a line.

According to the present invention, a part of the communication data transmitted from the data terminal of one private branch exchange is sampled, and the other private exchange sets another free line in which the communication data is set as a spare line. By checking whether the data sampled by one private branch exchange and the returned data are the same, a line test can be performed without affecting communication.

[0012]

1 and 2 are block diagrams showing an example of a private branch exchange system to which a circuit test method between private branch exchanges according to the present invention is applied. FIG. 1 mainly shows one private branch exchange 1. FIG. 2 is a block diagram mainly illustrating the other private branch exchange 2.

The private branch exchanges 1 and 2 have the same configuration and are connected via a line 3. As the line 3, an operation line 3a to be tested and a spare line 3b using another empty line are required.

The data terminal 4 housed and connected to one private branch exchange 1 is connected to the terminal control unit 1 in the private branch exchange 1.
1, connected to the line 3 via the network 12 and the line controller 13.

The data terminal 4 housed and connected to the other private branch exchange 2 is likewise connected to the terminal control unit 2 in the private branch exchange 2.
1, connected to the line 3 via the network 22 and the line control device 23. Paths are fixedly connected in the private branch exchanges 1 and 2, and communication between the data terminals 4 and 5 is possible.

One private branch exchange 1 has a central processing unit 14, and the entire private branch exchange 1 is connected to the central processing unit 14.
It is configured to be controlled by: The central processing unit 14 is connected to the maintenance terminal 6 for performing operations such as setting data in the private branch exchange 1 or setting a line test.

The other private branch exchange 2 also has a central processing unit 24, and the whole private branch exchange 2 is connected to the central processing unit 24.
It is configured to be controlled by: The central processing unit 14 and the central processing unit 24 are connected via modems 7 and 8.

The line control unit 13 of the private branch exchange 1 transmits a test pattern to the operation line 3a from the data terminal 4 and a test pattern sending unit 13a for transmitting a test pattern to the line 3 at the time of signal delay measurement or line connection test. A data sampling unit 13b for extracting the extracted communication data, a data detection unit 13c for detecting the test pattern or the extracted communication data returning from the spare line 3b, and a storage unit 13d for storing the measurement results and the test results. ing.

Similarly, the line controller 23 of the other private branch exchange 2 also has a test pattern sending section 23a, a data sampling section 23b, a data detecting section 23c, and a storage section 2c.
3d.

(Data Delay Measurement) Next, a line test method according to the present invention will be described. First, an operation of measuring data delay in a line to enable a line test during communication will be described with reference to sequence diagrams shown in FIGS.

First, the maintenance terminal 6 transmits a delay measurement start order of the operation line 3a to the central processing unit 14 of the private branch exchange 1 (step S1). The central processing unit 14 is connected to the central processing unit 24 of the private branch exchange 2 via the modems 7 and 8.
Then, an order to connect the path from the operation line 3a to the data terminal 5 to the backup line 3b is transmitted (step S2). The central processing unit 24 controls the network 22 so that the data from the operation line 3a is connected to the backup line 3b (step S3).

Next, the central processing unit 14 controls the line controller 1
Then, a delay measurement order of the operation line 3a is transmitted to the communication line 3 (step S4). Line controller 1 that received the order
3 sends a test pattern from the test pattern sending unit 13a to the operation line 3a (step S5).

This test pattern reaches the network 22 via the operation line 3a and the line controller 23 in the private branch exchange 2, where it is looped back and transmitted to the line controller 13 via the line controller 23 and the spare line 3b. Is performed (step S6).

The line controller 13 checks data from the spare line 3b, measures how much the test pattern returns with a delay, and stores it in the storage unit 13d. When the measurement is completed, the line control device 13 notifies the central processing unit 14 of the completion of the measurement (step S7).

The central processing unit 14 which has been notified of the end of the measurement
Displays the measurement result on the maintenance terminal 6 (step S
8) Further, an order for returning the path to the original setting is transmitted to the central processing unit 24 of the private branch exchange 2 via the modems 7 and 8 (step S9). In response, the central processing unit 2
4 controls the network 22 (step S10).

Next, the delay measurement order is transmitted from the maintenance terminal 6 to the central processing unit 24 of the private branch exchange 2 via the central processing unit 14 and the modems 7 and 8 (step S21).
~ 22). Further, the central processing unit 14 controls the network 12 so that the path of the working line 3a to be tested is connected to the spare line 3b (step S23).

Next, the central processing unit 24 transmits to the line controller 23 an order to perform a communication test of the operation line 3a to the line controller 23 (step S2).
4). The line controller 23 sends a test pattern from the test pattern sending unit 23a to the operation line 3a (step S25). This test pattern reaches the network 12 via the operation line 3a and the line controller 13 in the private branch exchange 1, where it is looped back.
3, transmitted to the line controller 23 via the spare line 3b (step S26).

The line controller 23 checks the data from the spare line 3b and measures how much the test pattern returns with a delay. When the measurement is completed, the line controller 23 notifies the central processing unit 24 of the completion of the measurement (step S27).

The central processing unit 24, which has been notified of the end of the measurement,
Transmits the measurement result to the maintenance terminal 6 via the modems 7, 8 and the central processing unit 14, and causes the maintenance terminal 6 to display the measurement result (steps S27 to S29). Further, the central processing unit 14 controls the network 12 to perform disconnection control for returning the path to the original setting (step S30).

If the test pattern does not return to normal, the line controllers 13 and 23 send a message to the maintenance terminal 6 to the effect that they are abnormal. In this way, the connection test of the operation line 3a can also be performed.

(Line Test in Operational State) Next, FIG.
With reference to the sequence diagram shown in FIG. 6, a line test when the operation line 3a is in operation will be described. In this state,
The data terminal 4 and the data terminal 5 are connected by a private path by the private branch exchanges 1 and 2, and data transmission / reception is performed.

First, the maintenance terminal 6 transmits to the central processing unit 14 an order for performing a line test of the operation line 3a connected to the line control device 13 (step S41).
The central processing unit 14 transmits an order for performing a communication test of the operation line 3a to the line control device 13 (step S4).
2) At the same time, an order for testing the operation line 3a is sent to the central processing unit 24 via the modems 7 and 8 (step S43).

The central processing unit 24 receives the order and places a path corresponding to the operation line 3a in the network 22 on the backup line 3b to control the data to be turned back (step S44). The path between the data terminals 4 and 5 remains connected.

Next, the line controller 13 samples the communication data transmitted from the data terminal 4 to the operation line 3a by the sampling circuit 13b by receiving the test order of the operation line 3a from the central processing unit 14 (step S45).

Communication data transmitted from the data terminal 4 is transmitted from the private branch exchange 1 to the data terminal 5 via the operation line 3a.
(Step S46), and is looped back by the network 22 to the line controller 23 and the spare line 3b.
Is transmitted to the line control device 13 of the private branch exchange 1 via the network (step S47).

The line controller 13 detects by the data detector 13c that the sampled data returns from the spare line 3b after the timing measured by the delay measurement, and the tested operation line 3a is normally connected. Make sure that

The line controller 13 notifies the result to the central processing unit 14 (step S48). The central processing unit 14 displays the result on the maintenance terminal 6 (step S4).
9) At the same time, the end of the test is notified to the central processing unit 24 via the modems 7 and 8 (step S50), and the path of the spare line 3b is released (step S51). Note that these series of processes are performed by the data terminal 4 as described above.
And data transmission and reception between the data terminals 5 at the same time.

Next, an order for performing a line test is transmitted from the maintenance terminal 6 to the central processing unit 24 of the private branch exchange 2 via the central processing unit 14 and the modems 7 and 8 (steps S61 to S62). Further, the central processing unit 14 controls the network 12 so that the path of the working line 3a to be tested is connected to the spare line 3b (step S63).

When the central processing unit 24 transmits an order to perform a communication test of the operation line 3a to the line control device 23 (step S64), the line control device 23 is transmitted from the data terminal 5 to the operation line 3a. The communication data is sampled (step S65). The communication data reaches the network 12 via the operation line 3a and the line controller 13 in the private branch exchange 1 (step S66), where it is looped back and transmitted to the line controller 23 via the line controller 13 and the spare line 3b. (Step S6
7).

The line controller 23 receives that the sampled data returns from the spare line 3b after the timing measured by the delay measurement, and confirms that the tested operation line 3a is normally connected. The line controller 23 notifies the central processing unit 24 of the result (step S68), and the central processing unit 24 notifies the central processing unit 14 via the modems 8 and 7 (step S69).

The central processing unit 14 displays the result on the maintenance terminal 6 (step S70), and restores the path of the spare line 3b set in the network 12 (step S7).
1). At this time, if the sampled data is not detected or does not return with the measured delay time, the result is displayed on the maintenance terminal 6.

[0042]

According to the present invention, since the line test between the private branch exchanges can be confirmed in the operation state, there is an advantageous effect that the line test can be performed without affecting the line communication. can get.

Further, according to the present invention, one free line is prepared in addition to the working line as a line for confirming data. This has the advantageous effect that it can also be used as a backup in the event of a failure.

Further, according to the present invention, since data during communication is sampled, it is possible to confirm whether or not data is flowing through the line. An advantageous effect that the operation can be performed after the state is confirmed is obtained.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an example of a private branch exchange system to which the present invention is applied.

FIG. 2 is a block diagram showing an example of a private branch exchange system to which the present invention is applied.

FIG. 3 is a sequence diagram showing a processing procedure of the present invention.

FIG. 4 is a sequence diagram showing a processing procedure of the present invention.

FIG. 5 is a sequence diagram showing a processing procedure of the present invention.

FIG. 6 is a sequence diagram showing a processing procedure of the present invention.

FIG. 7 is a block diagram showing a private branch exchange system for explaining a conventional line test method.

[Explanation of symbols]

 1, 2 private branch exchange 3 line 3a operation line 3b spare line 4,5 data terminal 6 maintenance terminal 7,8 modem 11/21 terminal control circuit 12,22 network 13,23 line control device 14,24 central processing unit 13a, 23a test pattern sending section 13b, 23b data sampling section 13c, 23c data detecting section 13d, 23d storage section

Claims (2)

[Claims] A plurality of private branch exchanges accommodating and connecting data terminals, and a plurality of lines connecting the plurality of private branch exchanges, wherein one of the private branch exchanges transmits a test pattern to a line to be tested; The other opposite private branch exchange loops back the test pattern to a spare line, the one private branch exchange detects the test pattern looped back from the spare line, and measures a signal delay or a connection test on the line to be tested. A line test method between private branch exchanges. 2. A private branch exchange for accommodating and connecting a data terminal, and a plurality of lines for connecting the plurality of private branch exchanges, and one of the private branch exchanges transmits from the data terminal, which is accommodated and connected by itself, to an operation line. The other private branch exchange loops back the communication data to a spare line, and the one private branch exchange detects the sampled data looped back from the spare line and outputs a signal on the working line. A line test method between private branch exchanges, wherein a delay measurement or a connection test is performed.