CN1330165C - Numerical user loop grab wire testing device and method - Google Patents

Abstract

The invention relates to a device for digital user loop line grabbing test, which belongs to the field of broadband access. The digital user loop line grabbing test device includes: a splitter board, including multiple pairs of relays and splitters, the common end of each relay forms a connection point with the input end of the splitter, and is connected to each user incoming line respectively, The output end of the splitter is connected to the PSTN network, the normally closed end of the relay is connected to each user board, and the normally open end is connected to the protection bus; the control board includes a control command input interface, a test outlet, a control logic circuit and multiple pairs of relays, The control command input interface receives the control command on the console, and controls the action of all relays on the separator board and the control board through the control logic circuit. The common end of the relay is connected to the protection bus, and the normally closed end is connected to the external test equipment through the test outlet. . The invention also provides a method for user loop line grabbing test.

Description

A Digital Subscriber Loop Line Catch Test Device

Technical field

The invention relates to a device and method for digital user loop line grabbing test, belonging to the field of broadband access. In particular, it relates to a line grabbing and user backup protection technology for XDSL (Digital Subscriber Line, Digital Subscriber Line) lines.

Background technique

Due to the large demand and growth of access to the Internet through cables, optical fibers and satellites, the emerging broadband technologies such as XDSL, which provide users with high bit rate transmission through copper twisted pairs, have been rapidly promoted and developed. At present, the XDSL market is becoming more and more mature, and there are millions of lines in the domestic market every year. At the same time of large-scale application, related work such as guarantee, maintenance, repair and line pre-selection becomes urgent. The most important wire grabbing technology in the existing XDSL line maintenance generally still adopts the traditional matrix method. The most obvious disadvantage of the traditional matrix wire grabbing method is that the number of relays used is huge, which is proportional to the square of the number of wires caught, and the internal Wiring is also more complicated. Therefore, in XDSL, which is a large-scale line application with millions of lines per year, the cost of using the matrix method to catch lines is relatively high. This just urgently needs a kind of new improved technology to finish same function with less expense.

Contents of the invention

The technical problem that the present invention solves is to provide a kind of grabbing test device of the digital subscriber loop that uses less relay, and this device has the function (M <N), and one to two pairs of digital subscriber lines can also be selected based on the maximum M pairs of subscriber lines selected in the first step.

The digital user loop line grasping test device of the present invention comprises:

Splitter board, including multiple pairs of relays and splitters, the common end of each relay forms a connection point with the input end of the splitter, and then connects with each user's incoming line, the output end of the splitter is connected with the PSTN network, and the relay's normally closed The terminal is connected to each user board, and the normally open terminal is connected to the protection bus;

The control board includes a control command input interface, a test outlet, a control logic circuit, and multiple pairs of relays. The control command input interface receives the control commands on the console, and uniformly controls the action of all relays on the separator board and the control board through the control logic circuit. The public end of the relay is connected to the protection bus, and the normally closed end is connected to the external test equipment through the test outlet.

It also includes a line connection switching board, including multiple pairs of relays controlled by a control logic circuit, the common end of which is connected to the protection bus, and the normally open end is connected to the backup user board.

It also includes multiple pairs of line protection devices connected between the connection point of the common end of the relay in the splitter board and the input end of the splitter and the user incoming line.

A kind of user loop grasping test method of the present invention, comprises the following steps:

Step 1: The corresponding roads of different boards are connected to form M pairs of buses;

Step 2: When testing, switch a certain input subscriber line of the device to the corresponding bus, so that the input subscriber line is connected to the bus;

Step 3: Select the bus with test users to switch to the output interface;

Step 4: When the test is over, disconnect the input subscriber line from the bus to restore the original connection path.

The line grabbing test device of the present invention has the advantages of less relays and simple connection, and can realize the function of backup protection, which can protect any pair of N pairs of subscriber lines, and can also protect N pairs of subscribers at the same time. Up to M pairs of subscriber lines in a line.

Description of drawings

Fig. 1 is the block diagram of the wire grab test equipment system of the present invention;

Detailed ways

The wire grab testing device of the present invention will be described below in conjunction with the accompanying drawings and through specific embodiments.

Referring to the system block diagram shown in Fig. 1, the user loop line grabbing test device of the present invention includes: a splitter board and a control board added with the line grabbing test and the backup protection function of the local end equipment.

In actual work, you only need to control the relay on the splitter board to switch the subscriber line to the protection bus, and then according to different requirements, converge to the test equipment through the control board, or switch the subscriber line to the standby bus through the line connection switching board user board.

In addition to the normal function of extracting low-frequency voice signals through the splitter board, a set of relays are added, which can automatically grab a subscriber line to the protection bus under the control of the control board. In the normal working state, the user incoming line is sent to the user board through the normally closed connection of the relay.

The control board receives the control commands on the external command console through the command input interface, uniformly controls the action of all relays on the splitter board, control board and line connection switching board, and realizes the backup protection function of the line grabbing test and the local end equipment. Among them, the realization of the wire grabbing test function is that the relay on the control board guides the M pairs of user lines through the protection bus to the board. According to the needs, select the designated line to switch and output to the test equipment interface through the relay for testing.

The backup protection function is that the M pairs of relays on the line connection switching board switch the subscriber line to be protected to the spare subscriber board with the corresponding number of lines to realize the protection function.

M pairs of protection lines from each splitter board are combined to form a protection bus, which is connected to all boards.

The detailed working process is as follows:

1. Thread grabbing test function

The public terminal of the splitter board relay is connected to the incoming line of the user, and the normally closed terminal of the relay is connected to the line of the user board to ensure that the original function remains unchanged under normal conditions, and the normally open terminal is connected to the protection bus. The subscriber lines corresponding to the number of splitter boards can be connected in parallel to form M pairs of protection buses (each splitter board has M pairs of subscriber lines, and each pair of lines in the bus is formed by parallel connection of P pairs of subscriber lines, with a total of N Input N=M×P to the user line, when testing, the splitter board relay switches the input line to the protection bus, through the backplane, the protection bus sends the user line switched by the separated front board to the control board, and the control board The corresponding relay then switches the subscriber line to the output port, so that the test equipment at the output port can test the subscriber line.

2. Backup protection function

The line is connected to the common end of the switching board relay to the protection bus, and the normally closed end is suspended in the air to ensure that the normal business will not be affected when it is not in action. The normally open end of the relay is connected to the user line of the backup user board. When the splitter board switches the user line to be protected to the protection bus, the corresponding relay on the line connection board will act to switch this user line to the corresponding line of the backup user board to realize protection. Function.

Of course, the backup protection function can also realize the simultaneous protection of certain subscriber lines of different subscriber boards. However, it is required not to correspond to different user boards, otherwise it will cause conflicts in the protection bus.

Claims (3)

1. A user loop grabbing test device, characterized in that, comprising: The splitter board includes splitters and multiple pairs of relays. The common end of each relay forms a connection point with the input end of the splitter, and then connects to each user's incoming line. The output end of the splitter is connected to the PSTN network, and the relay's normally closed The terminal is connected to each user board, and the normally open terminal is connected to the protection bus; The control board includes a control command input interface, a test outlet, a control logic circuit, and multiple pairs of relays. The control command input interface receives the control commands on the console, and uniformly controls the action of all relays on the separator board and the control board through the control logic circuit. The public end of the relay is connected to the protection bus, and the normally closed end is connected to the external test equipment through the test outlet. 2. The user loop line grab test device according to claim 1, characterized in that, it also includes a line connection switching board, including multiple pairs of relays controlled by the control logic circuit, its common end is connected with the protection bus, and the normally open end is connected to the backup user board. 3. according to claim 1 and 2 described user loop line grasping test devices, it is characterized in that, also comprise many pairs of line protection devices, the common terminal that is connected in the relay in the described splitter board and the input end of splitter Between the connection point and the customer's incoming line.

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