KR20020032724A - Apparatus and Method for ISDN test in electronic exchange system - Google Patents

Abstract

PURPOSE: An apparatus and method for testing an integrated services digital network of a full electronic telephone exchange system is provided to reduce the time for testing by simultaneously performing an in-test and an out-test, by applying to a full electronic telephone exchange system, and by reducing the number of a board for an ISDN test. CONSTITUTION: A control unit(31) controls the operation of each device for an ISDN(Integrated Services Digital Network) test. A mode connection unit(32) connects the control unit(31) to an NT mode unit(34) or an LT mode unit(36) according to a sort of a test. A clock generation unit(33) generates clocks for the ISDN test and provides the clocks to the mode connection unit(32). The NT mode and an interface unit(34,35) connects to the control unit(31) through the mode connection unit(32) and performs a test for a subscriber line. The LT mode and an interface unit(36,37) connects to the control unit(31) through the mode connection unit(32) and performs the test for the subscriber line. A line measuring unit(38) is connected to the control unit(31). In addition, the line measuring unit(38) measures subscriber lines.

Description

Apparatus and Method for ISDN test in electronic exchange system}

The present invention relates to an integrated services digital network (ISDN) test apparatus of an electronic switching system, and in particular, a board that performs a lot of time-consuming ISDN in test and out test. The present invention relates to a total information communication network test apparatus and test method for an electronic switching system that enables ISDN testing within a limited time by reducing the number of board types and testing time.

In general, the electronic switchboard can perform the exchange of digitized data while simultaneously performing the exchange of voice data. ISDN service is a representative case of digitalized data exchange through electronic switchboards.

The electronic switchboard is equipped with a device for testing the stability of the ISDN service. In other words, the ISDN test system is used to monitor whether the electronic switchboard can perform the ISDN service stably and to notify the operator in case of abnormality so that appropriate measures can be taken.

Hereinafter, the prior art for the ISDN test apparatus to be solved by the present invention.

First, FIG. 1 is a block diagram for In Test of an ISDN subscriber board according to the prior art, and FIG. 2 is a block diagram for Out Test of an ISDN subscriber line according to the prior art.

1 and 2, the apparatus for the conventional ISDN test is divided into two boards. One board is for In Test of the ISDN subscriber board, and the other board is for ISDN line out test.

In this way, by separating the board for the ISDN In Test and the board for the Out Test, it is possible to perform the in-test on the ISDN subscriber line and the out test on the ISDN subscriber line at the same time.

In the electronic switchboard, the ISDN tester conducts ISDN subscriber board and line tests by the host control system. The ISDN test is performed periodically in the exchange, and the test takes a certain time. The results of the ISDN test are reported to the operator.

In FIG. 1, when the upper control system commands an In Test for the ISDN subscriber board, the controller 11 controls the network termination mode 12 according to the test command to control the subscriber board interface 13. Test multiple items through The test result of the network termination mode unit 12 is reported to the operator for each item through the control unit 11.

When the upper control system commands an out test for the ISDN subscriber line in FIG. 2, the control unit 21 controls the line termination mode unit 22 and the line test measurement unit 25 to control the subscriber line interface unit. Various tests of the track are carried out through (23).

Out test is performed in the line termination mode. A general test item for the state of the line is tested by the line termination mode unit 22 and a test on the electrical characteristics of the line is performed by the line test measurement unit 25. . The controller 21 reports the result of performing the Out Test to the operator.

The test period of the Out Test is determined according to the reference clock supplied by the clock generator 24.

At this time, the network termination mode during the out test is performed only when instructed by the operator, and the line test during the in test and the out test is performed periodically according to a predetermined time interval.

The line termination test is mainly for testing the electrical characteristics of the line, and the exchange system periodically performs a test on the line to which the general subscriber is connected and reports the result thereof. Periodic testing of these subscriber lines will allow the operator to recognize the condition of the line.

In this way, the ISDN test apparatus is separately operated as a board for In Test and Out Test, so that the controllers 11 and 21 of each board independently control the ISDN test operation so that In Test and Out Test can be performed simultaneously. .

Since the buses for testing the In Test and Out Test are set separately, there is no restriction in performing the test. However, this case must be taken into consideration because the test bus shares the ISDN subscriber board, whether In Test or Out Test.

On the other hand, there is no conflict between the devices performing the U-line interface, so there are no restrictions on the line termination and network termination tests. The U-line refers to a connection path between a subscriber and a network. In the ISDN test, a test apparatus is used instead of a general subscriber.

The above description is for the ISDN test apparatus applied to the electronic switch STAREX TX-1A, the operation that can be implemented because the board performing the In Test and Out Test is separated.

On the other hand, in the case of ISDN test apparatus applied to models other than STAREX TX-1A, In Test and Out Test are performed on one board, so In Test and Out Test are not performed at the same time. That is, Out Test is not performed while In Test is performed, and Out Test is possible after In Test is finished.

Therefore, when one board is equipped with both In Test and Out Test functions, the number of types of boards is needed more or a lot of time is required to perform the test.

However, the above-described prior art has a disadvantage in that the board must be separated to simultaneously perform the In Test and the Out Test in the ISDN test apparatus. In other words, even if one board has In Test and Out Test functions, In Test and Out Test should be performed sequentially and simultaneous execution was not possible.

Accordingly, the present invention has been proposed to solve the above-mentioned conventional problems, and an object of the present invention is an ISDN in test and an out test that require a lot of time in an ISDN test apparatus of an electronic switching system. Provides a total information communication network test apparatus and test method of an electronic switching system that enables ISDN testing within a limited time by reducing the number of types of boards and testing time by performing (Out Test) at the same time. There is.

In order to achieve the above object, the integrated information communication network test apparatus of the all-electronic switching system according to the present invention includes a control unit for controlling the operation of each device for the ISDN test; A mode connection unit connecting the control unit to an NT mode unit or an LT mode unit according to a test type; A clock generator which generates a clock for an ISDN test and supplies the clock to the mode connection unit; An NT mode and interface unit connected to the control unit through the mode connection unit to perform a test on the subscriber board; An LT mode and an interface unit connected to the control unit through the mode connection unit to perform a test on the subscriber line; It is characterized in that the technical configuration consisting of a line measuring unit connected to the control unit for performing a line measurement for the subscriber line.

In order to achieve the above object, the integrated information communication network test method of the electronic switching system according to the present invention includes the steps of connecting a mode connection unit between a control unit and an NT mode unit in an In Test mode; Performing only the In Test alone or performing and reporting the line measurement test simultaneously with performing the In Test according to the instruction of the line measurement test in the step; Performing an Out Test by connecting the control unit and the LT mode unit in the Out Test mode; If In Test is indicated while the Out Test item is a line measurement test, simultaneously performing the line measurement test and the In Test and reporting the result to the controller; In the case where the line measurement test and the In Test are not simultaneously performed, the Out Test of the corresponding item and the step of reporting to the control unit are characterized by the technical configuration.

1 is a block diagram for In Test of an ISDN subscriber board according to the prior art,

Figure 2 is a block diagram for the out test of the ISDN subscriber line according to the prior art.

3 is a block diagram of an integrated information communication network test apparatus and test method thereof of an electronic switching system according to an embodiment of the present invention;

4 is a detailed configuration diagram of the mode connection unit in FIG.

5 is a flowchart of a test method applied to the apparatus according to FIG.

Explanation of symbols on the main parts of the drawings

31 control unit 32 mode connection unit

33: clock generator 34: NT mode

35: in-test interface unit 36: LT mode unit

37: out test interface unit 38: line measurement unit

Hereinafter, the configuration and operation of the present invention will be described in detail based on an embodiment according to the technical idea of the integrated information communication network test apparatus and test method thereof of the all-electronic switching system.

First, FIG. 3 is a block diagram of an integrated information communication network test apparatus and test method thereof of an electronic switching system according to an embodiment of the present invention. FIG. 4 is a detailed block diagram of a mode connection unit in FIG. 3 is a flowchart of a test method applied to the apparatus according to FIG. 3.

As shown in FIG. 3, a suitable embodiment of the apparatus according to the present invention comprises: a control unit 31 for controlling the operation of each device for ISDN testing; A mode connection part 32 connecting the control part 31 to the NT mode part 34 or the LT mode part 36 according to a test type; A clock generator 33 which generates a clock for an ISDN test and supplies the clock to the mode connection unit 32; An NT mode and interface unit (34, 35) connected to the control unit (31) through the mode connection unit (32) to test the subscriber board; An LT mode and interface unit (36, 37) connected to the control unit (31) through the mode connection unit (32) to test the subscriber line; It is connected to the control unit 31 is composed of a line measuring unit 38 for performing a line measurement for the subscriber line.

As shown in FIG. 5, the method according to the present invention includes a step of connecting the control unit 31 and the NT mode unit 34 between the control unit 31 and the NT mode unit 34 in an In Test mode, and performing an In Test (ST11). ; Performing only the In Test alone or performing and reporting the line measurement test simultaneously with performing the In Test according to whether the line measurement test is instructed in the step ST11 (ST12 to ST15); Performing an Out Test by connecting the control unit 31 and the LT mode unit 36 in the Out Test mode (ST21); If In Test is indicated while the Out Test item is a line measurement test, performing the line measurement test and the In Test at the same time and reporting the result to the control unit 31 (ST22 to ST24); In the case of not performing the line measurement test and the In Test at the same time, it performs the Out Test of the corresponding item and reports to the control unit 31 (ST25 to ST26).

In this embodiment, the control unit 31 facilitates the U-line interface using the MC68302 processor.

The NT mode unit 33 and the LT mode unit 36 have different hardware settings for each mode, and therefore, individual devices must be employed. Thus, the NT mode unit 33 and the LT mode unit 36 employ SIEMENS PEB2091, respectively.

The line measuring unit 38 is composed of a digital signal processing (DSP) and a measuring circuit for measuring electrical characteristics of a subscriber line. The configuration of the line measuring unit 38 is the same as in the prior art, and there is no restriction on a specific device.

In the apparatus according to the present invention, functional blocks for In Test and Out Test should be distinguished from each other.

In addition, out test includes on-demand test items for network termination (NT) as well as line measurement test.

However, if In Test and Out Test functions are implemented in one board, the test in NT mode connected to the general subscriber will be limited. That is, if In Test is performed for the ISDN subscriber, the item for NT mode cannot be tested.

The operation of the apparatus according to the present invention configured in consideration of the above constraints is as follows.

For ISDN subscriber boards, the test is initiated by a test command from the upper control system.

4 shows the signal connection direction of the mode connection unit 32 when In Test and Out Test are performed.

In this case, the mode connection unit 32 includes a plurality of OR gates 51 to 53 and AND gates 54 to 61. The notation method used in FIG. 4 is used for FSC, DCL, DD, and DU, respectively. Indicate the direction of signal connection. For example, the input / output signal of the LT mode unit 36 is represented by FSC_LT, DCL_LT, DD_LT, DU_LT, and the like.

Thus, when the upper control system instructs the In Test test, the control unit 31 controls the mode connection unit 32 to activate the connection path between the NT mode unit 34 and the control unit 31.

The NT mode unit 34 transmits a signal for a frame synchronous clock (FSC) and a data clock (DCL) to the controller 31. Then, DD (Data Down) and DU (Data Up) connected to the NT mode unit 34 are connected to the control unit 31.

Signal processing for the connection will be described in more detail.

When the NT mode unit 34 transmits FSC_PNT and DCL_PNT, the NT mode unit 34 is input to the third AND gate 56 and the fourth AND gate 57, respectively. At this time, the third AND gate 56 and the fourth AND gate 57 perform an AND operation on NT, FSC_PNT, and DCL_PNT, which are signals for activating the NT mode, and output the result of the operation as FSC_NT and DCL_NT.

The FSC_NT is input to the first AND gate 51 and is ORed with the FSC_LT, and the result of the operation is transferred to the controller 31 as the FSC_CPU. The DCL_NT is input to the second OR gate 52 and is ORed with the DCL_LT, and the operation result is transferred to the controller 31 as the DCL_CPU.

In this system, the FSC and the DCL signals are transmitted from the NT mode unit 36 to the control unit 31, and the control unit 31 receives the FSC and DCL signals and connects the DD (Data Down) connected to the NT mode unit 34. ) And DU (Data Up).

That is, the DD signal of the control unit 31 is respectively input to the fifth AND gate 58 and the seventh AND gate 60. Since the NT mode is activated, the output of the fifth AND gate 58 is It becomes invalid. In contrast, since the NT signal is valid, the seventh AND gate 60 receives DD and outputs DD_NT according to a result of the AND operation. The DD_NT is transferred to the NT mode unit 36 so that a path for data down is connected.

The NT mode unit 36 outputs a DU_NT signal for connection to data up. DU_NT is input to the eighth AND gate 61 to perform an AND operation on the NT signal. At this time, if the NT signal is in a valid state, the DU_NT is passed through to the third logical sum gate 53. The third OR gate 53 transmits the result of the OR operation of the DU_NT and the DU_LT signal to the controller 31 as the DU signal so that the connection for data up is made.

Since the mode connection unit 32 operates in such a scheme, a description of a scheme in which a series of signals other than the above-described signals are connected is omitted.

When the connection is established by the above operation, the connection for performing the In Test is completed. There is a separate connection to the test bus.

In Test is performed for each test item, and a test period may be set to perform a test on all ISDN subscriber boards at a predetermined time.

In the Out Test, the control unit 31 receiving the test command of the upper control system controls the line measuring unit 38 to test the electrical characteristics of the line. In the line characteristic test by the line measuring unit 38, each signal connection operation of the mode connecting unit 32 becomes unnecessary.

That is, the line characteristic test by the Out Test is performed in a state where the connection between the line measuring unit 38 and the out test interface unit 37 is made. In this connection state, the line measuring unit 38 performs various measurements on the line and then reports the result to the control unit 31. The control unit 31 reports the result according to the line measurement to the upper control system. Ensure test results are recognizable.

As such, the In Test and the Out Test can be performed at the same time in the case of the Out Test mainly performs only the line measurement periodically and the line measuring unit 38 can perform its own test, so that the control unit 31 is not restricted when measuring the line. So it is possible.

However, during the In Test, the connection to the LT mode unit 36 cannot be established.

Therefore, if you want to perform the test in NT mode connected to the general subscriber during In Test, you must stop the In Test and set the NT test environment in the Out Test category.

That is, when the upper control system transmits a test command for the NT mode activation item, a DD and DU connection is made between the control unit 31 and the LT mode unit 36 in FIG. 4 and the clock supplied from the clock generation unit 33 A connection is established to carry the FSC.

With this operation, if the connection setup for NT test environment is made among the Out Test items, the test according to each test item can be performed.

At this time, if connection setting for NT test environment is made, other test is impossible. If the test on the Out Test bus is already in progress, the Out Test bus is occupied, making the line measurement test impossible.

Therefore, considering only NT constraints in the out test, the in test test is possible while the line measurement test is performed during the out test, and the out test in-line measurement test is possible while the in test test is in progress.

This operation is more specified through the test method according to the present invention.

When the upper control system instructs In Test in FIG. 5, the mode control unit 32 connects the control unit 31 and the NT mode unit 34 by operating in the In Test mode (ST11). Then In Test is performed, and the line measurement test can be performed simultaneously with In Test (ST12 ~ ST13).

If the line measurement test is not performed at the same time, only In Test is performed alone and the result is reported to the upper control system (ST14 to ST15).

On the other hand, if it is necessary to set the environment for NT test during Out Test during In Test, In Test is terminated and the mode is changed to Out Test mode.

Out Test mode is started by the command of the upper control system, it is connected to the control unit 31 and the LT mode unit 36 (21).

In Out Test mode, In Test can be performed simultaneously with the line measurement test. When the upper control system instructs In Test while the line measurement test is being performed, the results of the line measurement test and the In Test are reported to the controller 31, respectively. (ST22 to ST24).

In the case where only the line measurement test is performed alone and the test for items other than the line measurement test is performed in the same manner as in the prior art to perform the Out Test (ST25 ~ ST26).

As such, the present invention is to enable the In Test and Out Test at the same time on one board.

Although the preferred embodiment of the present invention has been described above, the present invention may use various changes, modifications, and equivalents. It is clear that the present invention can be applied in the same manner by appropriately modifying the above embodiments. Accordingly, the above description does not limit the scope of the invention as defined by the limitations of the following claims.

As described above, the integrated information communication network test apparatus and test method thereof of the electronic switching system according to the present invention can implement the In Test and Out Test functions in one board, and both tests can be performed simultaneously. It works.

Therefore, when the In Test and Out Test functions are implemented in one board, it is impossible to perform the test at the same time, and to perform the In Test and Out Test at the same time, each test function must be implemented on the boards that are independent of each other. You can overcome it.

Therefore, by applying the device according to the present invention to the all-electronic switching system, it has the effect of reducing the number of types of boards for the ISDN test and the time required for the test through the simultaneous test.

Claims (4)

A control unit controlling an operation of each device for an ISDN test; A mode connection unit connecting the control unit to an NT mode unit or an LT mode unit according to a test type; A clock generator which generates a clock for an ISDN test and supplies the clock to the mode connection unit; An NT mode and interface unit connected to the control unit through the mode connection unit to perform a test on the subscriber board; An LT mode and an interface unit connected to the control unit through the mode connection unit to perform a test on the subscriber line; Comprehensive information communication network test apparatus of the all-electronic switching system characterized in that it is connected to the control unit consisting of a line measuring unit for performing a line measurement for the subscriber line. The method of claim 1, wherein the mode connection unit, It operates under the control of the control unit according to the test type. When performing the In Test on the subscriber board, the test path is connected between the control unit and the NT mode unit, and during the out test for the subscriber line, the test unit is connected between the control unit and the LT mode unit. Comprehensive information communication network test apparatus of the electronic switching system, characterized in that for configuring the test path by connecting the. Connecting, by the mode connection unit, the control unit and the NT mode unit in the In Test mode; Performing only the In Test alone or performing and reporting the line measurement test simultaneously with performing the In Test according to the instruction of the line measurement test in the step; Performing an Out Test by connecting the control unit and the LT mode unit in the Out Test mode; If In Test is indicated while the Out Test item is a line measurement test, simultaneously performing the line measurement test and the In Test and reporting the result to the controller; In the case where the line measurement test and the In Test are not simultaneously performed, the Out Test of the corresponding item and reporting to the controller are performed. The method of claim 3, wherein In the In Test mode, when the Out Test is required to set the NT test environment is indicated, after the end of the In Test is performed, the outgoing test of the integrated electronic communication system, characterized in that to perform sequentially.