JPH02126760A - Method and device for testing line opening - Google Patents

Abstract

PURPOSE:To confirm the opening condition of a transmission line with the operation of only one exchange by designating the line number of a tested communication line with a certain exchange in an exchange network, sending a line opening test control signal through a signal line to other exchange and transmitting a test signal to the designated communication line. CONSTITUTION:A line opening test control signal including the line number information of a communication line 4 for transmission and reception from a first exchange 101 is sent through a signal line to a second exchange 102 of the connecting destination of a test object line, a test signal is sent to the communication line 4 for the transmission designated by the line number information, and when the second exchange 102 receives the test signal, it is sent through a communication line 3 for receiving a response signal for the signal to the first exchange 101 and the response signal for the test signal sent by the first exchange 101 is decided.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a communication line opening test method and apparatus for a switching network using a signaling system having independent communication lines and signal lines.

[Conventional technology]

The conventional communication line activation test method is as described in ``Digital Switchboard Operation Method'', pages 189 and 190 (edited by Nippon Telegraph F11 Public Corporation, January 25, 1986). They confirmed each other's specifications while checking the audio manually. In addition, the line number of a communication line is key information for control signals and has an important meaning.Therefore, although it must correspond completely between both exchanges, conventionally it has not been possible to visually check it within each exchange. It was only a matter of using a method of confirmation.

[Problem to be solved by the invention]

In the above-mentioned conventional technology, there is no means to automatically check the open status of the communication line, and both exchanges manually check each other's voices, which requires a large number of human resources and is inefficient in checking work. Ta.

Furthermore, not only are there concerns about human error, but
Since there is no function to check the line numbers of communication lines, there was a problem in that errors in line numbers could not be detected.

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, an object of the present invention is to automatically check the normality of a communication line in a switching network and the open status of a transmission line by operating only one switch. Our goal is to provide the following.

[Means to solve the problem]

The above purpose is to transmit and receive communications (line activation test control signals including line number information) from the first exchange in a communication line activation test of a switching network equipped with communication lines and signal lines for transmitting control signals. is sent to the second exchange to which the line under test is connected through the signal line, and a test signal is sent to the communication line for the transmission specified by the line number information, and the second exchange When receiving the test signal, transmitting a response signal thereto to the first exchange via the communication line for reception;
This is achieved by determining the response signal to the test signal sent by the first exchange.

[Effect]

By specifying the line number of the communication line to be tested in an exchange in the exchange network (this is referred to as the first exchange), the line activation test control signal can be sent to other exchanges (this is referred to as the first exchange) via the signal line. (hereinafter referred to as the second exchange), and transmits the test signal to the specified communication line. The second exchange has a function of receiving the line opening test control signal and returning to the first exchange a test response signal corresponding to the test signal received from the designated communication line. The first exchange has a function to judge the test response signal sent back from the specified communication line to the same line, and by displaying the judgment result, both exchanges can use the communication line number stored in each It is possible to know the normality of the correspondence between the communication line and the physical communication line and the open status of the communication line.

〔Example〕

Hereinafter, the present invention will be explained in detail with reference to the drawings.

FIG. 1 is an exchange connection configuration diagram for explaining an embodiment of the present invention. This embodiment describes a case where the same information as the test signal is returned as the test response signal.

First, FIG. 1 will be explained. Reference numeral 1 denotes an input/output operation device of an exchange having an input/output function for displaying communication line designation operations and test results, 2 a signal line for transmitting line control signals, etc., and 3 a connection from the first exchange 101 to the second exchange 102. 4 is a communication line in the direction from the second exchange 102 to the first exchange 101, and in this case, both 3 and 4 have the same line number. The diagram generally shows an exchange 10 in a switching network consisting of a large number of exchanges.
1 (first exchange) is connected to the n-th lines 3 and 4, and another exchange 102 (second exchange) is selected, and 81 and 82 are connected to the n-th lines 3 and 4 of the respective exchanges.
It is the line trunk of the line. 5, 6.7 are a test signal transmitter, a test signal receiver, and a test signal returner, respectively. 91 and 92 are signal devices for connecting the signal lines 2 to the respective exchanges. The signal line 2 may be a simple cable that directly connects the exchanges, or the control signal may be selectively relayed and exchanged via a relay exchange 93 for the signal line, both of which have been conventionally implemented. It is possible to use a common line based on the CCITT standard.

Next, the operation of the present invention will be explained with reference to the flowchart of the embodiment shown in FIG.

First, a switch in the switching network, that is, the above-mentioned first switch 1
01 specifies the line number n of the line to be tested by inputting the type on the input/output operation device 1 (step 21). Thereby, as in step 22, the first exchange transmits a line opening test control signal including the line number n to the second exchange 102 as a test start signal via the signal line 2. This start signal is shown in FIG. 241. The first exchange 101
When it is confirmed that the second exchange 1 has been received, the test signal transmitter 5 and the test signal receiver 6 are connected to the designated line, and the test signal is transmitted from 5 through the communication line 4 (23). The second exchange 102 that received the start signal 41 knows that the designated line is number n for both transmission and reception, and connects the communication line n.
Connect the test signal return device 7 to (Step 31)
. Reference numeral 7 denotes a return device that simply returns the test signal received from the communication line 4 to the communication line 3. 7. In addition, various response methods are possible depending on the type of test. If the receiving line and transmitting line have different line numbers, the response may be converted to a frequency that matches the characteristics of the transmitting line, or a predetermined response may be used. This is possible in cases where code conversion is performed. Furthermore, line numbers for transmission and reception are generally paired, so the same number is designated, but it is generally possible to specify separate line numbers for transmission and reception as needed.

Further, the first exchange only specifies the line number for transmission, and it is also possible to leave the determination of the line for reception to the second converter as appropriate. In FIG. 2, when a voice signal of a predetermined frequency or a predetermined digitally coded signal is transmitted as a test signal 42, the second exchange 102 7 sends it back as 43, and sends it back to 44 via the communication line 3. The data is returned to the first exchange as shown in . The first exchange 101 which received this compares the content of the transmitted test signal 42 with the content of the received signal 44 (step 2).
4) Detect matches and mismatches and send the results to input/output operation device 1
(Step 25).

In this case, the comparison check is performed to check whether the frequency of the test signal 44 has been converted to the correct frequency and amplitude, or to the correct code, depending on the type of response described in 7 above.

If these verification results indicate a line abnormality, the test signal 42 is automatically retransmitted a predetermined number of times as necessary for confirmation.

By displaying the above results, the line opening test is successfully completed. Therefore, the first exchange 101 performs step 26.
As shown in FIG. 3, a line opening test control signal 45 corresponding to a completion signal is sent to the signal line 2, and at this time the test signal transmitter 5 and the test signal receiver 6 are opened.

The second exchange 102 sends the above line opening test control signal (completed)
When received, 7 is released.

By checking the test signal matching result using the above method, it is possible to check the consistency of the line number and physical communication line between both exchanges, the conduction state of the transmission path, etc.

〔Effect of the invention〕

According to the present invention, in a switching network such as a common line signaling system that is equipped with communication lines and signal lines independently, the consistency and transmission of common line signals with other exchanges can be improved by operating only one switch. It will be possible to check the road opening status, etc. In addition, by placing one test person in each of the transmitting and receiving exchanges, we were able to completely automate the tests that were previously performed manually. To illustrate this quantitatively for a typical telephone exchange network, for example, consider a relatively small-scale exchange network consisting of 1,000 exchanges and several hundred lines connected to each exchange. , and one other switch would require two people to make several hundred test calls. Therefore, even if it takes several minutes to test one call, the minimum total time is i.
, ooo minutes or more is required, and therefore requires 4 to 5 man-days of labor for one switch, and if this is done for a switching network of 1,000 switches, at least 4,000 to s.
This would have required ooo man-days of labor. As a result of the present invention automating this process, it becomes possible for one person to test all exchanges, and it is easily estimated that the total number of test days required for response monitoring will be reduced to a fraction of the above-mentioned labor force.

Furthermore, the confirmation of important control signals such as the line number of the communication line is automated, and there is no need to worry about misunderstandings caused by visual inspection, which is the case with the conventional method, and there are also effects such as being able to detect errors more reliably.

[Brief explanation of drawings]

FIG. 1 is an exchange connection configuration diagram for explaining an embodiment of the present invention, and FIG. 2 is a communication flow diagram for explaining the present invention in detail. 1... Exchange input/output operating device for designating test lines, displaying test results, etc., 2... Signal line, 3... Second
communication line in the direction from the exchange to the first exchange, 4.
A communication line in the direction from the exchange 1 to the second exchange, 5...
- Test signal transmitter, 6... test signal receiver, 7... test signal return device.

Claims (1)

[Claims] 1. In a communication line opening test of a switching network equipped with a communication line and a signal line for transmitting control signals, a line opening test that includes line number information of a communication line for transmission and reception from a first exchange. A control signal is sent to the second exchange to which the line under test is connected through the signal line, a test signal is sent to the communication line for the transmission specified by the line number information, and the test signal is sent to the second exchange to which the line to be tested is connected. When the second exchange receives the test signal, it sends a response signal thereto to the first exchange via the communication line for reception, and the first exchange responds to the sent test signal. A line opening test method characterized by determining the response signal. 2. The line opening test method according to claim 1, wherein the line number information is a pair of communication line numbers having the same numbers for transmission and reception. 3. The response signal is a signal that returns the test signal received by the second exchange as is, and the judgment determines whether the test signal sent by the first exchange corresponds to the returned signal. The line opening test method according to claim 1, characterized in that: 4. The line opening test method according to claim 1, wherein the first exchange displays the determination result. 5. In a communication line activation test method for a switching network equipped with a communication line and a signal line for transmitting control signals, the first exchange equipment tests a line activation test control signal containing line number information of a communication line for transmission and reception. means for transmitting a test signal through the signal line to a second exchange to which the target line is connected; means for transmitting a test signal to the communication line for transmission specified by the line number information; The second exchange has means for determining the response signal to the transmitted test signal, and when the second exchange receives the test signal, the second exchange transmits the response signal to the above through the communication line for reception. A line opening test device characterized by having means for transmitting data to a first exchange. 6. The line opening test device according to claim 5, wherein the line number information is a pair of communication line numbers having the same numbers for transmission and reception. 7. The means for sending the response signal is a means for returning the test signal received by the second exchange as it is;
2. The line opening test device according to claim 1, wherein the determining means is a means for determining whether the test signal sent by the first exchange and the returned signal match.