KR20030057049A - DSLAM equipment built in a testing board - Google Patents

Abstract

PURPOSE: A DSLAM device is provided to install a testing board in a DSLAM system, and to test a data transmission path up to a subscriber terminal through an external monitor terminal, thereby conveniently testing a path of the DSLAM system without installing an external measurement equipment. CONSTITUTION: Many ADSL subscriber boards(3A-3N) transmit subscriber information for ADSL communication through a communication line between a DSLAM system(1) and a subscriber terminal(2), create testing loopback signals or transceive external testing loopback signals. A control board(4) overall controls a transmission path testing function of the DSLAM system(1) by including the ADSL subscriber boards(3A-3N). A testing board(5) transceives a testing signal of a data transmission path. A CRT monitor(6) supplies setup-related information, and is comprised outside of the DSLAM system(1).

Description

DSLAM equipment built in a testing board

The present invention relates to a DS device with a built-in test board, and more particularly, has a test board in a DSLAM system, and has a built-in test board for testing a data transmission path to a subscriber terminal through an external monitor terminal. It is about.

In general, as the industrial society is developed into an information society, efforts are being made to share various information quickly and in large quantities among media. In particular, in the 1990s, technologically advanced countries have been competing to establish high-speed information and communication networks.In order to construct such high-speed information and communication networks, the broadcasting business is based on CATV network, the data and computer industry is based on internet, and the telecommunication business is The approach is based on the telephone network. In addition, among the methods for realizing such a high-speed information communication network, FTHH (fiber to the home) and ADSL (Asymmetric Digital Subscriber Line) methods are widely used.

However, the system based on the ASL (Asymmetric Digital Subscriber Line) is a high-speed digital service, for example, high-speed at the same time without interfering with the analog telephone service (POTS) on the existing twisted pair copper network that the subscriber network is configured It refers to a service system provided to telephone subscribers such as the Internet, online access, telecommuting, and VODIO ON DEMAND. In general, the ADSL line coding scheme uses discrete multi-tone (DMT) and carrierless AM / PM (CAP) scheme, and this ADSL DMT has 64-640 kbit / s when the asymmetric bandwidth characteristic is upstream. For downstream, it supports 8 Mbit / s at 500 kbit / s. Therefore, such an ADSL system has a characteristic of downloading a large file containing graphics from a medium such as the Internet, and a device called a DSLAM (xDSL Access Multiplexer) is usually used to execute the Internet. However, the DSLAM system is usually used in conjunction with a test device from the outside to test for abnormalities in the transmission path to the subscriber station.

Then, referring to the DSLAM system connected to the conventional data transmission path tester as described above with reference to FIG. 1, a plurality of ADSL for transmitting subscriber information for ADSL communication between the DSLAM system 70 and the subscriber terminal 71 through a communication line. A control board 73 for controlling overall functions of the DSLAM system 70 including the subscriber board 72A-N and the ADSL subscriber board 72A-N, and the control board 73 and the ADSL subscriber board. A bus 74 connected between (AN) and transmitting and receiving data and control signals, and an ATM measurement device 76 connected to the control board 73 through an optical cable 75 to execute a test of a data transmission path. Include.

Then, one end of the control board 73 is connected to the CRT monitor 77 that allows the operator to check the information of the subscriber.

In addition, the control board 73 is an optical interface unit 78 for interfacing the optical signal input through the optical cable 75, as shown in Figure 2, the ATM measurement input and output through the optical interface unit 78 Control board unit 79 for controlling the overall function of the DSLAM system 70, including the test function of the equipment 76, and PVI / contained in the optical signal according to the function control signal of the control board unit 79 It includes a data processing unit 80 for analyzing the PVC value and setting the corresponding subscriber board that needs to be tested.

On the other hand, referring to the operation of the DSLAM system connected to the conventional data transmission path tester as described above, first, the ATM measurement equipment 76 is connected to the optical interface 78 of the control board 73. In addition, the ATM measuring device 76 generates a cell signal including a PVI / PVC value and a data pattern for a test of the transmission path, and transmits the cell signal to the optical interface unit 78 of the control board 73 through the optical cable 75. Output Then, the optical interface unit 78 interfaces the optical signals input through the optical cable 75 and outputs them to the data processing unit 80. At this time, the data processing unit 80 analyzes the PVI / PVC value included in the optical signal according to the function control signal of the control board unit 79 of the control board 73 and sets a corresponding subscriber board for testing. Output to the unit 79. Therefore, the control board unit 79 adds a designated PATH signal to the subscriber board setting signal inputted from the data processing unit 80 and outputs it to the ADSL subscriber boards 72A-N. Then, the corresponding subscriber board 72A, which is requested to test the transmission path of the ADSL subscriber boards 72A-N, converts the input testing signal into an analog signal, for example, selected ported connected subscriber station 71 among 16 ports. To send. Then, the subscriber station 71 converts the input testing signal into a digital signal and loops back to the subscriber board 72A of the DSLAM system 70. The subscriber board 72A again outputs the test signal looped back from the subscriber station 71 to the ATM measurement device 76 through the control board unit 79 and the optical interface unit 78. Accordingly, the ATM measuring device 76 determines whether the transmission path of the DSLAM system 70 is normal by comparing the test signal looped back from the subscriber station 71 with the first generated data. At this time, the tester of the ATM measuring device 76 sets the PVI / PVC value of the ADSL subscriber board 72A-N through the control board unit 79 of the DSLAM system 70 using the CRT monitor 77. To control them.

However, the DSLAM system to which the conventional data transmission path test apparatus as described above is connected to an ATM instrument externally every time a single data transmission path test is performed, and thus the SETUP must be repeatedly operated. In addition, since the tester has to control the DSLAM system 70 through the CRT monitor 77 and the ATM measurement equipment 76 for the SETUP for the transmission path test, the convenience of the path test accordingly There was also a problem that considerably lowers.

Accordingly, the present invention has been invented to solve the above-mentioned conventional problems, and is provided with a test board in the DSLAM system to test the data transmission path from the external monitor terminal to the subscriber terminal, thereby measuring the data transmission path. Since there is no need to install external measuring equipment, the purpose is to provide a DSL device with a built-in test board that maximizes the convenience of the path test of the DSLAM system.

Another object of the present invention can selectively designate and test certain components on the transmission path of the DSLAM system through an external monitor terminal, so that the test accuracy of the DSLAM system is significantly improved. To provide.

In order to achieve the above object, the present invention provides a plurality of ADSL subscribers for transmitting subscriber information for ADSL communication and generating a loopback signal for testing or transmitting / receiving an external loopback signal for testing through a communication line between a DSLAM system and a subscriber station. A control board for overall control of the transmission path testing function of the DSLAM system including the board, the ADSL subscriber board, and the {I} ^ {2} C communication with the control board to transmit and receive a testing signal of the data transmission path. It provides a test board and a test board containing a test board including a CRT monitor to provide the setup-related information required for the data transmission path test to the test board and provided outside of the DSLAM system.

1 is an explanatory diagram illustrating a transmission path measuring apparatus of a conventional DSLAM system.

2 is an explanatory diagram illustrating a general control board of the DSLAM system.

3 is an explanatory diagram illustrating a DSLAM system of the present invention.

4 is an explanatory diagram illustrating a test board of the present invention.

<Detailed Description of Codes>

1: DSLAM system 2: subscriber terminal

3A-N: ADSL Subscriber Board 4: Control Board

5: test board 6: CRT monitor

7: optical interface unit 8: control unit

9: testing data generation unit 10: testing data detection unit

11: bus

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

The apparatus of the present invention transmits subscriber information for ADSL communication and generates a loopback signal for testing or a loopback signal for external testing between the DSLAM system 1 and the subscriber station 2 as shown in FIG. A control board 4 for controlling overall transmission path testing function of the DSLAM system 1 including a plurality of ADSL subscriber boards 3A-N to transmit and receive, and the ADSL subscriber boards 3A-N, and the control The test board 5 is connected to the board 4 through {I} ^ {2} C communication to transmit / receive the testing signal of the data transmission path, and setup information necessary for the data transmission path test to the test board 5 is provided. And a CRT monitor 6 provided outside the DSLAM system 1.

And, as shown in Figure 4, the test board 5 is an optical interface unit 7 for interfacing the optical signal transmitted and received with the control board 4 and the {I} ^ {2} C communication method, and the optical The control unit 8 for controlling the transmission path test function through the interface unit 7 and the testing data generation unit 9 for generating and outputting data for the path test and OAM cells according to the function control signal of the control unit 8. And a testing data detector 10 which detects the test signal looped back to the test transmission path, compares the test signal with the first test signal, and then outputs the result signal to the CRT monitor 6.

In addition, the control board 4 has the same configuration as in FIG.

Here, the bus 11 for transmitting and receiving data and control signals is connected between the control board 4 and the ADSL subscriber boards 3A-N.

Next, the operation and effect of the apparatus of the present invention as described above will be described.

First, the apparatus of the present invention designates a transmission path that an operator wants to measure on the CRT monitor 6 when testing the transmission path of the DSLAM system 1. In addition, the CRT monitor 6 transmits setup information necessary for the test to the controller 8 of the test board 5 of the DSLAM system 1 according to the operator's setting information. Then, the controller 8 transmits the data for the path test and the OAM cell signal, that is, the PVI / PVC value and the data for the test of the transmission path through the testing data generation unit 9 according to the setup information of the CRT monitor 6. The cell signal including the pattern is generated and transmitted to the optical interface unit 78 of the control board 4 by the {I} ^ {2} C communication method through the optical interface unit 7. Therefore, the optical interface unit 78 of the control board 4 interfaces the optical signal input from the test board 5 and outputs it to the data processing unit 80. At this time, the data processing unit 80 analyzes the PVI / PVC value included in the optical signal according to the function control signal of the control board unit 79 of the control board 4 and sets up the corresponding subscriber board for testing. Output to the unit 79. Therefore, the control board unit 79 adds the designated PATH signal to the subscriber board setting signal inputted from the data processing unit 80 and outputs it to the ADSL subscriber boards 3A-N.

On the other hand, the corresponding subscriber board (3N) of the ADSL subscriber board (3A-N) received a transmission path test converts the input testing signal into an analog signal, for example, selected ported connected subscriber station (2) of 16 ports To send. Then, the subscriber station 2 converts the input testing signal into a digital signal and loops back to the subscriber board 3N of the DSLAM system 1. The subscriber board 3N again transmits the test signal looped back from the subscriber station 2 to the optical interface unit 7 of the test board 5 through the control board unit 79 and the optical interface unit 78. {I} ^ {2} C Output by communication method.

Then, the optical interface unit 7 of the test board 5 interfaces with the test signal looped back from the subscriber station 2 and outputs it to the testing data detection unit 10. Therefore, the testing data detection unit 10 detects the test signal looping back the test transmission path through the optical interface unit 7 and compares the test signal with the reference test signal originally transmitted, and then compares the result signal with the function of the control unit 8. The control signal is output to the CRT monitor 6.

Therefore, the transmission path tester of the DSLAM system 1 determines the result signal displayed on the CRT monitor 6 to test whether there is an abnormality in the transmission path.

Here, the DSLAM system 1 basically provides a loopback function. For example, the optical interface unit 7, the data processing unit 80, and the ADSL subscriber board 3A-N have a loopback function. Since the loopback function is used through the setup information on the CRT monitor 6, the transmission path test can be performed up to the desired transmission path.

As described above, the present invention is provided with a test board in the DSLAM system to test the data transmission path from the external monitor terminal to the subscriber terminal, so that no external measurement equipment for measuring the data transmission path is required. Therefore, it has the advantage of maximizing convenience of path test of DSLAM system.

In addition, according to the present invention, since a predetermined component on the transmission path of the DSLAM system can be selectively designated and tested through an external monitor terminal, the test accuracy of the DSLAM system is also significantly improved.

Claims (2)

A plurality of ADSL subscriber boards for transmitting subscriber information for ADSL communication and generating a loopback signal for testing or transmitting and receiving loopback signals for external testing through a communication line between the DSLAM system and the subscriber terminal, and the DSLAM including the ADSL subscriber board. A control board for controlling the transmission path testing function of the system as a whole, a test board connected to the control board via {I} ^ {2} C communication to transmit and receive a test signal of a data transmission path, and data transmission to the test board It is a DSL device equipped with a test board that provides a setup-related information required for the path test and comprises a CRT monitor provided outside of the DSLAM system. The test board of claim 1, wherein the test board comprises: an optical interface unit for interfacing an optical signal transmitted and received with a control board with a {I} ^ {2} C communication method, a control unit for controlling a transmission path test function through the optical interface unit; A test data generation unit for generating and outputting data for a path test and an OAM cell according to a function control signal of the controller, detecting a test signal looped back to the test transmission path, and comparing the test signal with an initially transmitted reference test signal. As a result, the DSL device with a test board, characterized in that it comprises a testing data detection unit for outputting the signal to the CRT monitor.