CN1060304C - Device and method for whole machine testing of programable control exchange - Google Patents

Abstract

A device and method for testing a program-controlled exchange equipment. The test device is composed of a controller and a test module connected between the controller and the exchange equipment to be tested. The controller includes at least one centralized controller, and can be set up Several distributed controllers. Because the invention has a test modular structure corresponding to the modular structure of the program-controlled exchange equipment, the test time can be shortened several times for the exchange equipment composed of multiple modules, and the digital signal processing technology is used in the test module to improve the accuracy. In addition, it can also reflect the comprehensive performance of large-scale program-controlled switching equipment.

Description

Complete machine testing device and method for program-controlled switching equipment

The invention relates to the field of communication testing, and more particularly relates to a device and a method for testing a whole machine of program-controlled switching equipment.

Before the telephone exchange equipment leaves the factory, the hardware, software and related equipment of the telephone exchange must be tested to check whether the performance and technical indicators of the telephone exchange equipment meet the technical standards. These tests include user and trunk interface parameter tests; Index and signaling test; user, trunk external line test.

For large-scale program-controlled switching equipment, most of the existing whole machine testing technologies use the user circuit test board in the switching equipment module to test each user one by one. The test speed of this method is very slow and the test index Incomplete.

At present, some manufacturers have adopted a single-type complete machine test device, and its main disadvantages are:

1. Tests are slow. The existing device can only complete the test of a single-module switch, and for a multi-module large-scale switch, it can only be tested in time, and the speed is slow.

2. Low precision. Existing devices all use analog signals, which cannot achieve high precision and cannot test CCITT transmission indicators such as switch transmission loss stability and consistency, attenuation frequency characteristics, etc.

3. Incomplete. Existing test equipment has no scalability and cannot combine the test results of each module to reflect the comprehensive performance of large-scale program-controlled switches.

The purpose of the present invention is to overcome the above-mentioned shortcomings of the prior art, and provide a device for testing the whole machine of the program-controlled switching equipment, which has high speed and high precision during testing, and can conveniently reflect the comprehensive performance of the large-scale switching equipment .

Another object of the present invention is to provide a whole-machine testing method for program-controlled switching equipment.

In order to achieve the above object, the whole machine test device of the program-controlled switching equipment of the present invention includes a centralized controller and N distributed controllers (N is an arbitrary integer ≥ 0) and a plurality of test modules, and the test modules use a certain communication The method is connected in parallel between the controller and the corresponding switching equipment to be tested, and the test of each indicator can be completed at the same time according to the control instruction and the test results are reported to the controller. Wherein the test module may include a communication receiving/sending circuit for communicating with the controller, a command decoder for sorting the controller commands received by the communication receiving/sending circuit, and implement specific tests according to the commands sent by the command decoder The execution module of the step receives the test result of the execution module and reports it to the information processing unit of the controller through the communication receiving/sending circuit. The execution module may include a digital signal generating device, a digital signal receiving device, and a user/trunk distribution network for distributing the subscriber line and trunk line of the program-controlled switching equipment to the analog telephone group circuit or the digital signal generating and receiving circuit in a certain sequence. The circuit of the analog telephone set may include: an A/D converter for converting analog user signals into digital signals; a D/A converter for converting digital signals into analog user signals and traditional telephone circuits.

According to the whole machine testing method of the program-controlled switching equipment of the present invention, at least the following steps are included: 1. Set up a centralized controller, N decentralized controllers (N is an integer ≥ 0) and test modules according to the capacity of the switch, and connect multiple test modules in parallel between the controller and the switching device to be tested; 2. Write the test control program into the controller; 3. Make the controller issue a test command and send it to the test module, and the test module completes the test operation of the program-controlled switching device according to the received command; 4. Make the test module send the test result back to the controller.

In the method of the invention, one controller can centrally control multiple test modules, and multiple controllers can also implement decentralized control on each test module after being networked. The test module adopts digital signal processing technology.

Below in conjunction with accompanying drawing and embodiment, further describe the whole machine testing device and method of the present invention

Figure 1 is an overall block diagram reflecting the apparatus and method of the present invention.

FIG. 2 is a block diagram of a test module shown in FIG. 1 .

FIG. 3 is a block diagram of an execution module within the test module shown in FIG. 2 .

Fig. 4 is a block diagram of an analog phone group in the execution module shown in Fig. 3 .

Fig. 5 is an embodiment of the test device for the program-controlled switching equipment of the present invention.

FIG. 6 is an embodiment of a test module of the program-controlled switching equipment test device shown in FIG. 2 according to the present invention.

Fig. 7 is a flowchart of an embodiment of the method of the present invention for testing the attenuation frequency characteristics between two users as an example.

As shown in Fig. 1, the complete machine test device of program-controlled switchboard of the present invention comprises controller 2 and the corresponding test module 10 of number and switch module, and these test modules are connected by communication line 5 and subscriber cable and trunk cable 39 respectively Between the controller and the program-controlled switch module 40 to be tested; the controller 2 sends a test command to the test module, and the test module completes the test operation of the program-controlled switch according to the received command; and sends the test result back to the controller.

In order to facilitate the testing of various types of program-controlled switches, the test modules can be smoothly expanded, one controller can centrally control multiple test modules, and multiple controllers can be networked to implement decentralized control of more test modules.

A control card 3 can be configured inside the controller shown in FIG. 1 to complete the information communication between the controller 2 and the test module 10 .

Write the test control program into the controller 2. The configured control card 3 receives the commands sent from the test software in the controller 2, and sends them to the corresponding test module through the communication line 5 after processing, so that the test module completes the program-controlled exchange through the user cable and the trunk cable 39 according to the received command. The test operation, the test results are sent back to the control card 3 through the communication line 5, and the control card 3 sorts them out and reports them to the controller 2 for processing.

As shown in Figure 2, the above-mentioned test module may include;

A communication receiving/sending circuit 14 for communicating with the controller;

A command decoder 16 for sorting controller commands received by the communication receiving/transmitting circuit;

The execution module 20 that implements the specific test steps by the command sent by the command decoder;

Receive the test result of the execution module and report it to the information processing unit 18 of the controller through the communication receiving/sending circuit.

The test operation of the test module on the program-controlled exchange includes the following steps: 1. The command from the control card is received by the communication receiving/sending circuit and stored in the command buffer; 2. After receiving a group of commands, the command decoder classifies the commands and sends them to the execution module according to a certain combination sequence; 3. The execution module specifically executes the test operation, and stores the result in the information processing unit, and the information processing unit reports to the controller through the communication receiving/sending circuit.

Fig. 3 is the block diagram of an executive module in the test module shown in Fig. 2, and wherein, digital signal generation circuit 22 is used for producing required various digital tone signals (as dual tone) in the test process, and digital signal receiving circuit 23 is used for receiving Various digital tone signals, user/trunk line distribution network 21 groups all subscriber lines and trunk lines of the program-controlled exchange and receives them one by one on the analog telephone set circuit or digital signal generation and receiving circuit according to requirements, and the analog telephone set circuit 30 is composed of ordinary functions The phone is composed of A/D and D/A conversion circuits. Figure 4 is the composition structure of an analog phone. It can be seen from this that, except for the A/D converter 31 and the D/A converter 32, the remaining circuits and Like a normal feature phone, it includes:

A dial tone detection circuit 33;

A ring-back tone detection circuit 34;

A busy tone detection circuit 35;

A ring current detection circuit 36;

A two-tone numbering unit 37;

A pulse signaling unit 38;

Pick up hook circuit 29.

A simple test example is to use two analog phones to communicate with each other to complete the performance test of the interface between two users of the exchange.

An embodiment of the above test device for the whole switch is shown in FIG. 5 . In Fig. 5, the centralized controller 200 and the distributed controller 201 all adopt PC computers, and the control card adopts the eight serial port cards 250 and 251 inserted into the expansion slot of the PC machine. A pair of serial ports 218 and 219 of the cards 250 and 251 are interconnected into a network, and the test module 231 is connected to the first serial port of the eight-serial port card 250 through the serial port communication line 211, ... and the test module 244 is connected to the eight-serial port card through the serial port communication line 224 The eighth serial port of 251, in this way, two PC computers, two eight serial port cards, and fourteen serial port communication lines can control fourteen completely independent test modules to realize the test of large-scale program-controlled switches.

An example of a test module of the switch complete machine testing device shown in Figure 5 is shown in Figure 6, the asynchronous serial port receiving circuit 302 receives the order through the serial port 211, and sends it to the CPU 305 through the parallel port 303, and the CPU 305 sends the order after receiving the order and classifying it. Buffer 304, after receiving a group of commands, CPU 305 takes out commands from command buffer 304 and sends them to CPU minimum system 308, 309, 310 respectively through high-speed serial port 307 by category. If CPU minimum system 308 receives order, then control digital signal processor 311 or send digital tone to D/A converter 312 or receive digital tone or carry out digital signal, signaling analysis from A/D converter 313, once received The signal is sent to the CPU 305 for processing through the CPU minimum system 308, and then sent to the serial port 211 through the asynchronous serial port transmission circuit 302, where the CPU 305 and the asynchronous serial port transmission circuit 302 form an information processing unit; if the CPU minimum system 310 receives the order, then control the switch The matrix 315 switches the subscriber line 39 of the program-controlled exchange to the analog telephone group 314 according to a group of 64 users, or directly switches the digital trunk line of the program-controlled exchange to the digital signal processor 311; The telephone group 314 operates, and the analog telephone group 314 contains 64 analog telephones, which realize the detection of various tones such as on-hook, dialing, dial tone, ringback tone, busy tone, etc., and ring current detection, etc. The detection results are reported by the CPU minimum system 309 Once a channel is formed through the analog telephone set 314, the digital signal processor 311 performs various data analysis through the A/D converter 313 and D/A converter 312, and the analysis results are reported through the CPU minimum system 308.

As an embodiment of the testing method, it can be seen from the flow chart shown in FIG. 7 which takes testing the attenuation frequency characteristic between user A and user B as an example.

As shown in Fig. 7, after CPU 305 informs to carry out the attenuation frequency characteristic test between user A and B, under the control of CPU 309, analog phone A and analog phone B first establish the user A and user B telephone path through switchboard, then, The digital signal processor is controlled by the CPU308 to send a level of 0dBm, and the single tone with a frequency of f0 is sent to user A after D/A conversion, and then sent to the analog phone B through the channel between user A and B for A/D conversion. The single tone level is received by the digital signal processor, and then fm is measured cyclically according to the step size Δf, and the attenuation frequency characteristic between user A and user B of the exchange can be tested by repeating the above test process.

As can be seen from the above scheme, the present invention has the following effects:

1. Compared with the single-type complete machine test device, the device of the present invention has a test modular structure corresponding to the modular structure of the program-controlled switch, and one test module can complete the test of one module of the switch, and a plurality of test modules that can be smoothly expanded can be used. Simultaneous testing of multi-module large-scale switches is completed at the same time. Therefore, for a switch composed of n modules, the test time can be shortened by n times, that is, the detection speed is greatly improved.

2. The whole machine testing device of the present invention can test all users and relay interfaces of the exchange, and the fault location is accurate.

3. The whole machine testing device of the present invention adopts digital signal processing technology in the test module, which improves the test accuracy. At the same time, the test of various digital relays and transmission indicators of the switch can be carried out by means of the signal processor, and the test time of the single-module switch is also shortened. .

4. The whole machine test device provided by the present invention adopts a modular structure, so when new test functions and test capabilities need to be added, it can be easily expanded by adding modules.

5. The whole machine test device of the present invention can carry out call test of large traffic volume and inter-module test, which provides a powerful means for the detection of large-scale program-controlled exchanges.

Although the principles and embodiments of the switch equipment testing device and method of the present invention have been described in detail above, it goes without saying that those skilled in the art may make various decisions based on the above description without departing from the determination of the appended claims. obvious modifications or variations within the spirit and scope of the invention.

Claims (13)

1. A complete machine testing device for program-controlled switching equipment, characterized in that: it includes a controller and a test module connected in parallel between the controller and the corresponding module of the switching equipment to be tested in a communication manner, and the testing module is based on the described The instructions issued by the controller can simultaneously complete the test of each performance index of the switching equipment and report the test results to the controller. The test module includes: a communication receiving/sending device for communicating with the controller; A command decoder for controller commands received by the communication receiving/sending circuit; an execution module for implementing specific test steps according to the commands sent by the command decoder; and an information processing unit for receiving and processing the test results of the execution module. 2. The whole machine testing device of program-controlled switching equipment according to claim 1, characterized in that: said controller is a centralized controller and N distributed controllers (wherein N is any integer ≥ 0). 3. The whole machine testing device of program-controlled switching equipment as claimed in claim 1, characterized in that said execution module includes: a digital signal generating device, a digital signal receiving device, an analog telephone set circuit and a subscriber/trunk line distribution network, wherein the digital The signal generating device generates a digital test signal according to the command of the command decoder, converts it into an analog test signal through the analog telephone set circuit, and sends it to the switching equipment under test through the user/trunk distribution network; the response signal of the switching device under test passes through the user/trunk distribution network Send it to the analog telephone set circuit to convert it into a digital test signal, then send it to the digital signal receiving device for processing, and then send it to the information processing unit. 4. The whole machine test device of program-controlled switching equipment as claimed in claim 3, characterized in that each telephone circuit in the analog telephone group circuit includes: A/D converter, D/A converter, a dial tone detection circuit, a ringback tone detection circuit, a busy tone detection circuit, a ring current detection circuit, a dual-tone numbering unit, a pulse numbering unit, and a hook-up circuit, wherein the digital signal formed by the digital signal generation circuit is passed through The D/A converter is converted into an analog signal and sent to the switching device under test, the signals generated by the dual-tone numbering unit, the pulse numbering unit and the pick-up circuit are sent to the switching device under test, the dial tone detection circuit, and the ringback tone detection circuit 1. The busy tone detection circuit and the ring current detection circuit receive the signal tone from the switching device to be tested for detection, and the analog user signal from the switching device to be tested is converted into a digital signal by the A/D converter and sent to the digital signal receiving circuit. 5. The whole machine testing device of program-controlled switching equipment according to claim 1 or 2, characterized in that: said controller is a computer. 6. The whole machine testing device of the program-controlled switching equipment according to claim 1 or 2, characterized in that a control card is provided in the controller to complete the information communication between the controller and the test module. 7. The whole machine test device of program-controlled switching equipment as claimed in claim 6, which is characterized in that said controllers are interconnected into a network through said control card to realize the test of large-scale program-controlled switching equipment. Use multi-channel serial/parallel card, LAN card, LAPD card or communication circuit. 8. The whole machine testing device of program-controlled switching equipment according to claim 1, characterized in that said communication receiving/sending circuit includes an asynchronous serial port receiving/sending circuit, a serial port, and a parallel port, and the asynchronous serial port sending circuit and a CPU form the said Information processing unit, the CPU, other peripheral circuits and RAM form the command decoder, the serial port receives the command from the controller, after being processed and converted by the asynchronous serial port receiving/sending circuit, it is sent to the command decoder by the parallel port for execution; On the contrary, the information of the information processing unit is sent to the asynchronous serial port receiving/sending circuit through the parallel port for processing and conversion, and then reported to the controller through the serial port. 9. The whole machine testing device of program-controlled switching equipment as claimed in claim 8, characterized in that: wherein said execution module includes a plurality of CPU minimum systems each with a communication interface, used to receive the command of the command decoder, control The digital signal processor and the switch matrix operate, and the digital signal processor sends the digital signal generated by the switch matrix to the switching device to be tested, and at the same time processes the response information reported by the switching device to be tested through the switch matrix. 10. A method for testing a program-controlled switching device, which is characterized in that it comprises the following steps: respectively setting a corresponding number of test modules according to the capacity of the switching device to be tested, and connecting the test modules in parallel to the controller and the program-controlled switch to be tested between; write the test control program into the controller; make the controller send a test command and send it to the test module, and the test module completes the test operation of the program-controlled switching device according to the received command; make the test module write the test result sent back to the controller. 11. The whole machine testing method according to claim 10, characterized in that the method can use one controller to centrally control multiple test modules. 12. The whole machine testing method according to claim 10, characterized in that multiple controllers can be networked to implement decentralized control of each testing module. 13. The whole machine testing method as claimed in claim 10, characterized in that said test module adopts the following steps for the test operation of the program-controlled switching equipment: the communication receiving circuit of the tested module receives the command from the controller, and sends it Stored in the command buffer; After a group of commands have been received, the commands are classified by the command decoder of the test module, and sent to the execution module of the test module in a certain combination sequence; the execution module specifically executes the test operation , and store the result into the information processing unit of the test module; the test result is sent to the controller by the communication sending circuit of the test module.

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