JPH0335858B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a line quality random test method for measuring the line quality of a communication network.

(Prior Art) Generally, the line quality of a communication network is often measured on a maintenance basis or on a device basis. In other words, in this type of measurement, there are departments that perform construction or maintenance of transmission lines and repeaters, or construction or maintenance of switching equipment and signal processing equipment, so we ask these departments to perform maintenance or construction work. At the same time, we are trying to obtain the necessary line quality characteristics.

(Problem to be solved by the invention) However, since the above-mentioned means for evaluating the line quality of communication networks is based on data from each department, it is difficult to comprehensively evaluate line quality under appropriate conditions. This problem not only requires time and effort to determine, but also requires enormous costs to obtain the necessary test data for each department.

Moreover, in future communication networks, it is conceivable that signals will reach the receiving terminal from the originating terminal via various communication devices or transmission media, and
It is expected that the number and types of destination terminals connected to a calling terminal will gradually increase. Therefore, in such a communication network, it becomes extremely difficult to evaluate the characteristics of the line quality from the service level at the time of terminal installation or the performance of each communication device, and it is difficult to make a comprehensive evaluation by calculation. unable to give. Moreover, as different communication devices made by different manufacturers are connected and services are increasingly provided to users via different networks, data obtained from each maintenance department, etc. will be used. However, the result is almost meaningless.

Therefore, for example, it is possible to measure the line quality by distributing test equipment for line quality measurement in the connection part of normal terminals in the communication network, and having the calling station test equipment and the receiving station test equipment face each other. Since each transmitting station tester uses all stations in the communication network as receiving station testers, for example, if two or more transmitting station testers perform incoming connection operations at approximately the same time, an invalid call called "opposite station busy" may occur. become. This must be avoided because it means that more calls are made to the communication network than the measured number of calls, which lowers the processing capacity of the communication network. Further, when an invalid call occurs, it is necessary to call again and have the receiving station test equipment measure the line quality, which is undesirable because the line quality test speed is significantly reduced. Furthermore, if a line other than the line to be measured is captured for purposes such as measurement data transmission, the functionality of the network will deteriorate. Furthermore, if two or more transmitter station testers perform unique operations and collect measurement data, it can be determined from the obtained measurement data whether the problem is related to the local station or the entire network. Therefore, it is difficult to make an appropriate evaluation of the communication network from the collected data.

The present invention has been made in view of the above-mentioned circumstances, and aims to provide a line quality random test method that can avoid invalid call operations between test machines and efficiently proceed with required measurements. .

(Means and effects for solving the problem) The line quality testing method according to the present invention connects a control station tester to one of the terminal equipment connection parts in the communication network, and connects each of the other terminal equipment connection parts to At the same time as connecting the test machines, one control station test machine sends grouped dial number data to each test machine via the communication network, and at the same time sends group data and outgoing data for the first time to make a call. A station testing device is designated, and the calling station testing device that receives this designation designates a receiving station testing device based on the group data to measure the line quality, collects the measurement data, and ends the process. The report is returned to the control station, and the control station tester then returns to the second control station.
By sending the group data and transmission data and specifying a transmitting station tester to perform the same processing, one transmitting station tester is identified for each group, and the transmitting station tester is within the group. Since the receiving station test equipment is sequentially designated and the line quality is measured, there is no invalid call operation and measurements can be carried out efficiently. In addition, each test machine requires only one line, so
The reduction in the number of network lines due to testing will be minimal.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings. FIG. 1 is a schematic diagram in which the method of the present invention is applied to a communication network. Generally, in a communication network, a communication line 15 is connected between a plurality of exchanges, for example, 11 to 14, as shown in FIG.
- 14 are each provided with terminal connection parts 21 - 24 such as at least one connection terminal, a wiring board, or a switch, and these terminal connection parts 2
1 to 24 are connected to normal terminals 31 to 34, such as telephones and facsimiles.

Therefore, in the line quality testing method of the present invention, any one of the necessary terminal connection parts, for example 21 to 24, etc. in the communication network as described above, has a terminal function that can make and receive calls to, for example, 21. A control station tester (hereinafter referred to as RC) 41 is connected,
Test machines (referred to as TS for convenience of explanation) 42 to 44, ... are connected to the other terminal connection parts, respectively, and this control station test machine RC sends grouped dial number data to each test machine TS... ,
Sends group data and transmission data specifying the transmitting station to a predetermined test device TS to specify the transmitting station test device, and these transmitting station test devices determine the receiving station test device within the group and measure the line quality. will be carried out. Therefore, the communication network shown in FIG. 1 can be schematically represented as shown in FIG.

By the way, the control station tester RC and other testers TS are configured as shown in FIG. 3, for example, when a computer is used. That is,
It includes a CPU 51 that executes processing based on predetermined program data, and from this CPU 51 a bus 52 for addresses, data, etc., and a control line 53 are led out. This bus 52 and control line 53 include a ROM (read only memory) 5.
4 and RAM (Random Access Memory) 55
is connected. In the case of the control station test machine RC, this ROM 54 contains program data for functioning as the test machine RC, as well as connection data as shown in Fig. 5 for the network corresponding to Fig. 4 as necessary. In the case of a transmitting station tester, program data such as connection of the receiving station tester, measurement operation instructions, and collection of measurement data are stored, and in the case of a receiving station tester, programs for the necessary functions are stored. Data is stored. Said
In the case of the control station tester RC, the RAM 55 stores the connection data, connection start data, etc., and in the case of the originating station tester, the measurement data of the receiving station tester,
Other necessary data is stored, and in the case of a receiving station tester, measurement data is stored.

Further, a keyboard 57 is connected to the buses 52 and 53 via a key input circuit 56, and a display section 59 is similarly connected via a display control circuit 58. Further, the buses 52 and 53 each have a modem 61 that converts a data signal into a voice band signal and vice versa via an I/O port 60 having a latch function, and a dial signal sending circuit that sends out a dial pulse. 62, a tone signal receiving section 63 that receives a tone signal, a communication path confirmation section 64 that outputs different frequency signals on the calling and receiving sides to check the connection state of the communication path, and a 16Hz ringing tone from the other party's station. A receiving section 65, a line quality measuring section 66, and a line capture release section 67 are connected, and further connected to an exchange via a communication line.
Here, the targets for measuring line quality are line loss,
Examples include line noise and quantization noise.

Next, the operation of the system of the present invention will be explained. Now, the fourth
In the network shown in the figure, the operations that the control station tester RC performs on the testers A to P are as follows:
Follow the flowchart shown in the figure. That is, the CPU 51 of the control station tester RC performs initialization processing based on the start command from the keyboard 57 (step S1), and then performs initialization processing in step S3.
After reading the count value n=0 of the counter section of the RAM 55, the dial number pulse of the test machine A is sent from the dial signal sending circuit 62 to the test machine A based on the connection data table (Fig. 5) of the ROM 54 or RAM 55. After that, it is confirmed via the communication path confirmation section 64 that a communication path has been established with the test device A (step S4). After that, the CPU 51 loads the ROM as shown in step S5.
54 or RAM 55 from the connection data table shown in FIG. If the test condition data is not sent when specifying the transmitting station test device, the test condition data is sent together, and then group data b, c, d and this group data b,
Each testing machine related to c, d E~H, I~L, M~P
Send dial number data and test condition data. That is, the grouped dial number data is converted into a signal by the modem 61 and sent out (step S5). After that, in step S6, it is determined that all the dial number data to test machine A has been transmitted, and after +1 is added to the counter section of RAM 55 (step (S7), the count value of this counter section reaches up to test machine P. Determine whether the goal has been reached (step
S8) If no determination has been made, the process moves to step S4 and all group data and dial number data for the next test machine B are sent out in the same way.
Then, for all test machines A, B, ..., P, group data shown in Fig. 5 and each test machine A to
Once the dial number data of P has been sent, it is determined whether the test start time has been reached (step
S8a), if it has been reached, move to step S9,
After confirming that the count value n = 0, which is different from the counter section of the RAM 55, as shown in FIG. First, among I and M, for example, a dial number pulse is sent from the dial signal sending circuit 62 to the test device A, and it is confirmed that the communication path has been established via the communication path confirmation section 64 ( Step S10), then
The control code of the own station, the transmission code for specifying the transmitting station, and the group data a are transmitted, and the testing machine A is designated as the transmitting station testing machine (step S11). After that, it is determined whether or not the transmission of data related to test device A has ended (step S12), and when it is determined that the transmission has ended, the next test device E is sent to the transmitting station based on the count value of the counter section of the RAM 55. It will be designated as a test machine. Then, in step S14, it is determined whether testing machine M has been designated as a transmitting station or not, and when it is determined that all have been designated, the process ends.
Note that, if necessary, the number of outgoing calls data may also be sent out at the same time in step S11.

The transmitting station test devices A, E, I, and M, which have been designated as described above, have the group data a, b,
From c and d, test machines a ₀ ~ a ₃ , ~, d ₀ ~
Since we already know the dial number data for _d3 , we can sequentially send dial number pulses to the test devices within the group to designate them as receiving station test devices, and then send measurement condition data to measure the line quality. let That is, each receiving station test device has a line quality measuring section 66.
Measures one or more types of line loss, line noise, quantization noise, etc. using the 1000A, and transmits the result data to the transmitting station test equipment. Therefore, each of the transmitting station testers A, E, I, and M collects measurement data from the receiving station testers within the group. After collecting the measurement data, the transmitter station testers A, E, I, and M transmit the completion report or the completion report and the collected measurement data to the control station tester RC.

After measuring the line quality for the first time in this way, from the control station tester RC to each transmitter station tester A,
For E, I, and M, a group other than the above-mentioned one is set, for example, a group as shown in FIG. Group data d is sent to the testing device I, and group data a is sent to the transmitting station testing device M, and the line quality is similarly measured. Needless to say, this second line quality measurement is also carried out according to the flowchart shown in FIG. In the case of the network shown in FIG. 7, the line quality measurement was repeated four times, that is, one line quality measurement was performed for all test machines. and,
After collecting the fourth measurement data, if the transmitter station testers A, E, I, and M only send a completion report to the control station tester RC, the control station tester RC will send each transmitter station tester A , E, I, and M to download measurement data all at once.

Therefore, according to the configuration of the embodiment as described above,
The test machines scattered in the network are grouped in advance, and a predetermined test machine from one control station test machine is designated as a transmitting station, and a receiving station test machine is sequentially assigned to these transmitting station test machines in groups. Each transmitting station tester gives measurement instructions to the corresponding group's receiving station tester to measure the line quality, and collects the measurement data and transmits it to the control station tester. , two or more calling station test machines do not call the same test machine, and this can avoid a situation where an invalid call operation occurs. In addition, since line quality is measured by grouping a large number of test equipment, and the group is recognized by the control station test equipment, line quality measurement data can be regularly measured, and from a comprehensive perspective. , or can appropriately judge the status of individual lines. Further, since there is no invalid call operation, there is no unnecessary use of the line, which contributes to a reduction in the amount of data transmission and allows for efficient line quality testing.

In addition, in the above embodiment, it is described that only the receiving station tester measures the quality of the line, but the originating station tester itself has the same configuration as the control station tester and the receiving station tester. , the quality of the line may be measured and transmitted to the control station tester. In addition, the present invention can be implemented with various modifications without departing from the gist thereof.

(Effects of the Invention) As detailed above, according to the present invention, the line quality is such that invalid call operations between test machines can be avoided, and the required measurement can be carried out efficiently by reducing the amount of data transmission. Random testing method can be provided.

[Brief explanation of drawings]

Figures 1 to 8 are shown to explain an embodiment of the line quality random test method related to the present invention. Figure 1 is a schematic diagram showing the general configuration of a communication network, and Figure 2 is a control diagram. Figure 3 is a schematic diagram showing the relationship between the station testing equipment and each testing equipment in the network, Figure 3 is a hardware configuration diagram when using a CPU, Figure 4 is a diagram showing how the testing equipment is scattered in the network, Figure 5 is a diagram showing an example of a table of connection data stored in the control station tester, Figure 6 is a flowchart explaining the operation of the control station tester, and Figures 7 and 8 are for specifying the originating station. FIG. 3 is a diagram in which a plurality of receiving station test devices are grouped together. 11...exchange, 15...communication line, 41-44...
Testing machine, RC...Control station testing machine, TS...Testing machine, 51
. . . CPU, 54 . . . ROM, 55 .

Claims (1)

[Claims] 1 In the method of testing the line quality of communication networks,
Test machines each having a single line interface are connected in place of the terminal equipment in the communication network, and one control station test machine sends grouped dial number data to each test machine via the communication network. At the same time, for the first time, group data and outgoing data are transmitted to designate a transmitting station test device, and the transmitting station test device that receives this designation specifies a receiving station test device based on the group data and checks the line quality. , and collects the measurement data and sends a completion report to the control station tester.Subsequently, the control station tester sends out the second group data and transmission data to the transmitter station. Specify a test device to perform the same process, repeat the operation a number of times equivalent to the number of groups, and receive a completion report and measurement data from each transmitting station test device, or if only a completion report is received, each test A line quality random test method that is characterized by performing an operation to download measurement data from the device.