CN104041001B - A kind of numeral subscriber line local side device, terminal installation and reverse electric power system - Google Patents

Abstract

The invention discloses a kind of numeral subscriber line local side device, terminal installation and reverse electric power system, to realize the object increasing reverse power supply distance.Described numeral subscriber line local side device, comprising: local side processing module, powered module, at least one road bureau end First Line hold the second line to drawn game end interface module to, at least one road bureau; Described local side First Line to described local side second line to one_to_one corresponding; Described local side processing module is connected with described local side interface module by described local side First Line pair; Described powered module and described local side First Line are to being connected; The right first end of described local side second line is with corresponding described local side First Line to connection, and right the second end of described local side second line is connected with described local side interface module; By make local side second line to local side First Line to transmitting d. c. voltage signal simultaneously, after being connected with end side, increase the transmission current that the line that is connected with end side is right, thus the reverse power supply distance of increase end side.

Description

A Digital Subscriber Line Central Office Device, Terminal Device and Reverse Power Supply System

technical field

The invention relates to the technical field of communication, in particular to a digital subscriber line local end device, a terminal device and a reverse power supply system.

Background technique

With the rapid development of Internet technology and the rapid promotion of multimedia services, the demand for network bandwidth is increasing, and wired broadband access is developing from twisted pair to fiber optic access. However, in the renovation of some old residential areas, it will encounter the practical problem of the difficulty of fiber optic access, so that the optical fiber can only be laid near the door of the residents, and the last short section of home cable needs to use the existing twisted pair resources. Aiming at this scenario, the prior art provides a solution for fiber/copper downshifting of fiber to the distribution point (Fiber to the Distribution Point, FTTDP). The FTTDP solution is based on the traditional fiber to the curb (Fiber to the Curb, FTTC) solution. The optical fiber is moved down to the street cabinet or the computer room of the community, and the remote digital subscriber line access multiplexer (Digital Subscriber Line Access Multiplexer, DSLAM) is placed in the street cabinet or the computer room of the community, and then the twisted pair is connected to the user's home by the DSLAM.

Since FTTDP is relatively close to users, about 15m to 300m, the number of sites is very large (tens of thousands or even hundreds of thousands of sites). Because there is generally no ready-made commercial power available in the FTTDP installation location, and even if the commercial power can be used to supply power to equipment, due to the huge number of FTTDP sites, this is a huge burden for operators. Therefore, how to solve the problem of equipment power supply has become a difficult problem for operators, and it is also a huge obstacle for the commercialization of FTTDP solutions.

Reverse power supply is an optional solution to solve the problem of FTTDP power supply, as shown in Figure 1 for example: including central office equipment 101, terminal equipment 102, reverse power supply receiving end (PoweredDevice, PD) 103, reverse power supply supply end (PowerSupplyEquipment, PSE) 104, and wire pair 105. G.Fast is adopted between the central office equipment 101 and the terminal equipment 102, and digital subscriber line (Digital Subscriber Line, DSL) technology such as VDSL2/ADSL2/2+ can also be used for reverse power supply. The protection module 107 is coupled to the twisted pair. The reverse power supply receiving end 103 at the local end extracts the DC voltage passed by the isolation/protection module 107 after isolating G.Fast, and uses it as a power input. G.Fast and DC voltage are coupled through an isolation module.

The above reverse power supply technology has the following problems: only a single wire pair is used for reverse power supply + DSL, and the other wire pair is free; and the distance of reverse power supply is limited.

Contents of the invention

The embodiment of the present invention provides a digital subscriber line central office device, a terminal device and a reverse power supply system to solve the problem of a small reverse power supply distance of a digital subscriber line.

In the first aspect, a digital subscriber line central office device is provided, including a central office processing module, a power receiving module, at least one first line pair of the central office, at least one second line pair of the central office, and a central office interface module; the central office The first line pair is in one-to-one correspondence with the second line pair at the central office;

The central office processing module is connected to the central office interface module through the first line pair of the central office; the power receiving module is connected to the first line pair of the central office; the first line pair of the second line pair of the central office connected to the corresponding first line pair of the central office, and the second end of the second line pair of the central office is connected to the interface module of the central office;

The central office interface module is used to provide an interface for connecting the first line pair of the central office and the second line pair of the central office to the terminal side device;

The first wire pair at the local end is used to transmit digital signals, receive DC voltage signals transmitted from the terminal side, and receive DC voltage signals transmitted from the second wire pair at the local end;

The second wire pair at the local end is used to receive the DC voltage signal transmitted from the terminal side, and transmit the DC voltage signal to the first wire pair at the local end;

The central office processing module is configured to process digital signals transmitted by the first line pair at the central office;

The power receiving module is configured to receive DC voltage signals transmitted by the first line pair at the central office, and supply power to devices at the central office according to the DC voltage signals.

In combination with the first aspect, a first possible implementation manner of the first aspect is provided. In the first possible implementation manner of the first aspect, a first isolation module at the local end is further included, and the The power receiving module is connected to the first line pair at the central office through the first isolation module at the central office;

The first isolation module of the local end is used to isolate the digital signal between the power receiving module and the first line pair of the local end, so that each DC voltage signal transmitted by the first line pair of the local end passes through and reaches The power receiving module.

In combination with the first possible implementation of the first aspect, a second possible implementation of the first aspect is provided, in the second possible implementation of the first aspect, It also includes a second isolation module at the central office, the first end of the second line pair at the central office is connected to the first line pair at the central office through the second isolation module at the central office;

The second isolation module of the local end is used to isolate the digital signal between the second line pair of the local end and the first line pair of the local end, so that the DC voltage signal received by the second line pair of the local end passes through and reaches The first line pair at the central office.

In combination with the second possible implementation of the first aspect, a third possible implementation of the first aspect is provided, in the third possible implementation of the first aspect, It also includes a local end on-off module, and the local end second isolation module is connected to the local end first line pair through the local end on-off module;

The central office on-off module is used to control the on-off of the connection between the central office second isolation module and the central office first line pair.

In combination with the third possible implementation of the first aspect, a fourth possible implementation of the first aspect is provided, in the fourth possible implementation of the first aspect, The local-end on-off module includes at least two switches insulated from each other.

In combination with the first aspect or any one of the first to fourth possible implementations of the first aspect, a fifth possible implementation of the first aspect is provided, in which In the fifth possible implementation manner of the first aspect, the local first isolation module includes at least two inductors that are insulated from each other; or, at least includes two low-pass filters that are insulated from each other.

In combination with the first aspect or any of the second to fourth possible implementations of the first aspect, a sixth possible implementation of the first aspect is provided, in which In the sixth possible implementation manner of the first aspect, the second isolation module at the local end includes two inductors that are insulated from each other; or, includes two low-pass filters that are insulated from each other.

The beneficial effects of the embodiment of the present invention are as follows: In the solution of the embodiment of the present invention, the first line pair of the local end device and the second line pair of the local end device can transmit DC voltage signals at the same time, and after being connected to the terminal side device through the transmission line, The terminal side device provides DC voltage signals to the first line pair of the local end and the second line pair of the local end through the transmission line; since the transmission lines corresponding to the first line pair of the local end and the second line pair of the local end are connected in parallel, it can reduce The resistance of the transmission line increases the current in the transmission line, thereby obtaining a greater reverse power supply distance.

In a second aspect, a digital subscriber line terminal device is provided, including a terminal processing module, a power supply module, a first line pair of a terminal, a second line pair of a terminal, and a terminal interface module;

The first line pair of the terminal passed by the terminal processing module is connected to the terminal interface module; the power supply module is connected to the first line pair of the terminal; the first end of the second line pair of the terminal is connected to the terminal The first line pair is connected, and the second end of the second line pair of the terminal is connected to the terminal interface module;

The terminal interface module is used to provide an interface for connecting the first line pair of the terminal and the second line pair of the terminal to the central office side device;

The first line pair of the terminal is used to transmit digital signals, transmit a DC voltage signal provided by the power supply module, and transmit a DC voltage signal to the second line pair of the terminal;

The second line pair of the terminal is used to receive the DC voltage signal transmitted by the first line pair of the terminal, and provide the DC voltage signal to the central office side device;

The terminal processing module is configured to process digital signals transmitted by the first line pair of the terminal;

The power supply module is configured to provide a DC voltage signal to the first line pair of the terminal.

In combination with the second aspect, a first possible implementation manner of the second aspect is provided. In the first possible implementation manner of the second aspect, a first terminal isolation module is further included, and the The power supply module is connected to the first wire pair of the terminal through the first isolation module of the terminal;

The first isolation module of the terminal is used to isolate the digital signal between the power supply module and the first line pair of the terminal, so that the DC voltage signal provided by the power supply module passes through and reaches the first line pair of the terminal.

In combination with the first possible implementation of the second aspect, a second possible implementation of the second aspect is provided, in the second possible implementation of the second aspect, It also includes a second isolation module of the terminal, the first end of the second line pair of the terminal is connected to the first line pair of the terminal through the second isolation module of the terminal;

The second isolation module of the terminal is used to isolate the digital signal between the second line pair of the terminal and the first line pair of the terminal, so that the DC voltage signal transmitted by the first line pair of the terminal passes through and reaches the terminal Second pair.

In combination with the second possible implementation of the second aspect, a third possible implementation of the second aspect is provided, in the third possible implementation of the second aspect, It also includes a terminal on-off module, the second isolation module of the terminal is connected to the first line pair of the terminal through the terminal on-off module;

The terminal on-off module is used to control the on-off of the connection between the second isolation module of the terminal and the first line pair of the terminal.

In combination with the third possible implementation of the second aspect, a fourth possible implementation of the second aspect is provided, in the fourth possible implementation of the second aspect, The terminal on-off module includes at least two switches insulated from each other.

In combination with the second aspect or any one of the first to fourth possible implementations of the second aspect, a fifth possible implementation of the second aspect is provided, in which In the fifth possible implementation manner of the second aspect, the terminal first isolation module includes at least two inductors that are insulated from each other; or, at least includes two low-pass filters that are insulated from each other.

In combination with the second aspect or any of the second to fourth possible implementation manners of the second aspect, a sixth possible implementation manner of the second aspect is provided, in which In the sixth possible implementation manner of the second aspect, the terminal second isolation module includes two inductors that are insulated from each other; or, includes two low-pass filters that are insulated from each other.

The beneficial effects of the embodiment of the present invention are as follows: In the solution of the embodiment of the present invention, the terminal first line pair and the terminal second line pair of the terminal device can transmit DC voltage signals at the same time. The transmission line provides DC voltage signals to the first line pair of the central office and the second line pair of the local end; since the transmission lines corresponding to the first line pair of the terminal and the second line pair of the terminal are connected in parallel, the resistance of the transmission line can be reduced, making the transmission line The current in the circuit is increased, so as to obtain a larger reverse power supply distance.

A third aspect provides a digital subscriber line reverse power supply system, including the central office device as provided in any one of the second to sixth possible implementation manners of the first aspect, and at least one of the second For the terminal device provided in any one of the sixth possible implementation manners, the terminal interface module of each terminal device is connected to the central office interface module of the central office device through a first wire pair and a second wire pair, The first line pair corresponds to the terminal first line pair of the terminal device and a central office first line pair of the central office device, and the second line pair corresponds to the terminal second line pair of the terminal device and the first line pair of the central office device. Corresponds to the second line pair of a central office device of the central office device.

The beneficial effects of the embodiment of the present invention are as follows: In the embodiment of the present invention, the first line pair of the central office device and the second line pair of the central office are connected with the first line pair of the terminal and the second line pair of the terminal device One-to-one corresponding connection can transmit DC voltage signals at the same time, and the terminal device provides DC voltage signals to the first line pair of the local end and the second line pair of the local end through the transmission line; Reduce the resistance of the transmission line to increase the current in the transmission line, thereby obtaining a greater reverse power supply distance.

Description of drawings

FIG. 1 is a schematic structural diagram of a digital subscriber line reverse power supply system in the prior art;

FIG. 2 is a schematic structural diagram of a first digital subscriber line central office device provided by an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a second digital subscriber line central office device provided by an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a third digital subscriber line central office device provided by an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a fourth digital subscriber line central office device provided by an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a first digital subscriber line terminal device provided by an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a second digital subscriber line terminal device provided by an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a third digital subscriber line terminal device provided by an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of a fourth digital subscriber line terminal device provided by an embodiment of the present invention;

FIG. 10 is a schematic structural diagram of a digital subscriber line reverse power supply system provided by an embodiment of the present invention.

detailed description

An embodiment of the present invention provides a digital subscriber line central office device and a terminal device to achieve the purpose of increasing the reverse power supply distance. In order to better understand the technical solutions of the present invention, the solutions of the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

It should be clear that the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

Embodiment one

Referring to FIG. 2 , an embodiment of the present invention provides a digital subscriber line central office device 200A, including a central office processing module 201, a power receiving module 202, at least one central office first line pair 203, at least one central office second line pair 204 and The central office interface module 207; the first line pair 203 at the central office corresponds to the second line pair 204 at the central office.

The central office processing module 201 is connected to the central office interface module 207 through the first line pair 203 of the central office; the power receiving module 202 is connected to the first line pair 203 of the central office; The first end of the second line pair 204 is connected to the corresponding first line pair 203 of the central office, and the second end of the second line pair 204 of the central office is connected to the interface module 207 of the central office.

The central office interface module 207 is configured to provide an interface for the central office first line pair 203 and the central office second line pair 204 to connect to a terminal side device.

The first line pair 203 at the central office is used to transmit digital signals, receive DC voltage signals transmitted from the terminal side, and receive DC voltage signals transmitted from the second line pair 204 at the central office.

The second wire pair 204 at the local end is used to receive the DC voltage signal transmitted from the terminal side, and transmit the DC voltage signal to the first wire pair 203 at the local end.

The central office processing module 201 is configured to process digital signals transmitted by the first wire pair 203 at the central office.

The power receiving module 202 is configured to receive the DC voltage signals transmitted by the first wire pair 203 at the central office, and supply power to devices at the central office according to the DC voltage signals.

In the embodiment of the present invention, the central office first line pair 203 and the local end second line pair 204 can transmit DC voltage signals at the same time. The line provides a DC voltage signal to the first wire pair 203 at the local end and the second wire pair 204 at the local end; since the transmission lines corresponding to the first wire pair 203 at the local end and the second wire pair 204 at the local end are connected in parallel, the transmission line can be reduced. The resistance increases the current in the transmission line, thereby obtaining a larger reverse power supply distance.

Referring to FIG. 3 , on the basis of the digital subscriber line central office device 200A shown in FIG. 2 , a second digital subscriber line central office device 200B is provided. The difference from the digital subscriber line central office device 200A is that the digital subscriber line central office device 200B also includes a central office first isolation module 205, and the power receiving module 202 communicates with the central office through the central office first isolation module 205. The first wire pair 203 is connected.

The first isolation module 205 at the local end is used to isolate the digital signal between the power receiving module 202 and the first line pair 203 at the local end, so that each DC voltage transmitted by the first line pair 203 at the local end The signal reaches the power receiving module 202 after passing through.

In the embodiment of the present invention, by setting the first isolation module 205 at the local end, each DC voltage signal transmitted by the first line pair 203 at the local end passes through and reaches the power receiving module 202, and the digital signal will not be transmitted to the power receiving module 202, so that digital signal transmission will not be disturbed, and at the same time increase the stability of reverse power supply.

Referring to FIG. 4 , on the basis of the digital subscriber line central office device 200A shown in FIG. 2 , a third digital subscriber line central office device 200C is provided. The difference from the digital subscriber line central office device 200A is that the digital subscriber line central office device 200C also includes a central office second isolation module 206, and the first end of the central office second line pair 204 is isolated by the central office second isolation module 206. The module 206 is connected to the first wire pair 203 at the central office.

The second isolation module 206 at the local end is used to isolate the digital signal between the second line pair 204 at the local end and the first line pair 203 at the local end, so that the DC voltage received by the second line pair 204 at the local end The signal reaches the first line pair 203 at the central office after passing through.

In the embodiment of the present invention, by setting the second isolation module 206 of the local end, each DC voltage signal transmitted by the second line pair 204 of the local end passes through and reaches the first line pair 203 of the local end, increasing reverse power supply stability.

Referring to FIG. 5 , on the basis of the digital subscriber line central office device 200B shown in FIG. 3 , a fourth digital subscriber line central office device 200D is provided. The difference from the digital subscriber line central office device 200B is that the digital subscriber line central office device 200D also includes a central office second isolation module 206, and the first end of the central office second line pair 204 passes through the central office second isolation module. The module 206 is connected to the first wire pair 203 at the central office.

The second isolation module 206 at the local end is used to isolate the digital signal between the second line pair 204 at the local end and the first line pair 203 at the local end, so that the DC voltage received by the second line pair 204 at the local end The signal reaches the first line pair 203 at the central office after passing through.

That is, the fourth digital subscriber line central office device 200D is provided with both the central office first isolation module 205 and the central office second isolation module 206, so that each DC voltage transmitted by the central office second line pair 204 After the signal passes through, it reaches the first line pair 203 of the local end, so that the DC voltage signals transmitted by the first line pair 203 of the local end pass through and reach the power receiving module 202, and the digital signal will not be transmitted to the receiving module 202. The electrical module 202 further improves the stability of digital signal transmission and reverse power supply.

In each of the above embodiments, the local first isolation module 205 includes at least two inductors that are insulated from each other; or, at least includes two low-pass filters that are insulated from each other. The second isolation module 206 at the local end includes two inductors that are insulated from each other; or, includes two low-pass filters that are insulated from each other. The selection of specific components depends on the actual design requirements, installation space and cost, and will not be repeated here.

Simultaneously, in order to conveniently control the on-off status of the connection between the second isolation module 206 at the central office and the first line pair 203 at the central office, the digital subscriber line central office device 200C shown in FIG. 4 and the digital subscriber line central office shown in FIG. 5 The end device 200D can also provide a module with a control on-off function, such as the local end on-off module 208, and the local end second isolation module 206 is connected to the local end first wire pair through the local end on-off module 208. 203 connections. The central office on-off module 208 is used to control the on-off of the connection between the central office second isolation module 206 and the central office first line pair 203 . The local-end on-off module 208 may be a plurality of switches combined in pairs and insulated from each other. For example, it is two switches insulated from each other, whereby when it is desired to disconnect the connection between the second isolation module 206 at the local end and the first line pair 203 at the local end, it can be realized by opening the switch.

Of course, the central office on-off module 208 can also be provided to the digital subscriber line central office device 200A and the digital subscriber line central office device 200B, and can also be arranged at other connection locations as required. For example, in the digital subscriber line central office device 200A shown in FIG. 2 , the central office on-off module 208 is directly arranged between the central office second line pair 204 and the central office first line pair 203; for another example, In the digital subscriber line central office device 200B shown in FIG. 3 , the central office on-off module 208 is disposed between the central office first isolation module 205 and the central office first line pair 203 . It can be seen that the local-end on-off module 208 can be flexibly set as required. However, the embodiments of the present invention are only for illustration, and the present invention is not limited thereto.

In addition, the digital subscriber line central office devices 200A, 200B, 200C, and 200D provided in this embodiment can be single-channel, dual-channel or multi-channel equipment, and it can be understood that one channel is represented as: central office processing module 201, power receiving module 202 , a first line pair 203 at the central office, a second line pair 204 at the central office, and an interface module 207 at the central office. The two lines are represented as: the central office processing module 201, the power receiving module 202, the first line pair 203 of the two central office ends, the second line pair 204 of the two central office ends, and the interface module 207 of the central office end, and the first line pair 203 of the two central office ends. One-to-one combination with the second line pair 204 of the two local offices. Multi-channel is similar to two-channel, that is, the first line pair 203 at the multi-channel central office and the second line pair 204 at the multi-channel central office are respectively one-to-one combinations.

Embodiment two

Referring to FIG. 6 , the embodiment of the present invention provides a digital subscriber line terminal device 300A, including a terminal processing module 301 , a power supply module 302 , a first terminal line pair 303 , a terminal second line pair 304 and a terminal interface module 307 .

The first line pair 303 of the terminal passed by the terminal processing module 301 is connected to the terminal interface module 307; the power supply module 302 is connected to the first line pair 303 of the terminal; the second line pair 304 of the terminal One end is connected to the first terminal line pair 303 , and the second end of the terminal second line pair 304 is connected to the terminal interface module 307 .

The terminal interface module 307 is configured to provide an interface for connecting the first line pair 303 of the terminal and the second line pair 304 of the terminal to the central office side device.

The first line pair 303 of the terminal is used to transmit digital signals, transmit a DC voltage signal provided by the power supply module 302 and transmit a DC voltage signal to the second line pair 304 of the terminal.

The second line pair 304 of the terminal is configured to receive the DC voltage signal transmitted by the first line pair 303 of the terminal, and provide the DC voltage signal to the central office side device.

The terminal processing module 301 is configured to process digital signals transmitted by the first line pair 303 of the terminal;

The power supply module 302 is configured to provide a DC voltage signal to the first line pair 303 of the terminal.

In the embodiment of the present invention, the terminal first line pair 303 and the terminal second line pair 304 of the terminal device can transmit DC voltage signals at the same time. The line pair 203 and the second line pair 204 of the central office provide DC voltage signals; because the transmission lines corresponding to the first line pair 303 of the terminal and the second line pair 304 of the terminal are connected in parallel, the resistance of the transmission line can be reduced, so that the current in the transmission line Increase, so as to obtain a larger reverse power supply distance.

Referring to FIG. 7 , on the basis of the digital subscriber line terminal device 300A shown in FIG. 6 , a second type of digital subscriber line terminal device 300B is provided. The difference from the digital subscriber line terminal device 300A is that the digital subscriber line terminal device 300B also includes a terminal first isolation module 305, and the power supply module 302 is connected to the terminal first line pair 303 through the terminal first isolation module 305 connect.

The first isolation module 305 of the terminal is configured to isolate the digital signal between the power supply module 302 and the first line pair 303 of the terminal, so that the DC voltage signal provided by the power supply module 302 can pass through and reach the first line pair of the terminal. One line to 303.

In the embodiment of the present invention, by setting the first isolation module 305 of the terminal, the DC voltage signal provided by the power supply module 302 passes through and reaches the first line pair 303 of the terminal, thereby increasing the stability of reverse power supply.

Referring to FIG. 8 , on the basis of the digital subscriber line terminal device 300A shown in FIG. 6 , a third digital subscriber line terminal device 300C is provided. The difference from the digital subscriber line terminal device 300A is that the digital subscriber line terminal device 300B also includes a second terminal isolation module 306, and the first end of the terminal second line pair 304 is connected to the terminal second isolation module 306. The terminal first line pair 303 is connected.

The second isolation module 306 of the terminal is configured to isolate the digital signal between the second line pair 304 of the terminal and the first line pair 303 of the terminal, so that the DC voltage signal transmitted by the first line pair 303 of the terminal passes through Reach the terminal second line pair 304 .

In the embodiment of the present invention, by setting the second isolation module 306 of the terminal, the DC voltage signal transmitted by the first line pair 303 of the terminal passes through, reaches the second line pair 304 of the terminal, and isolates the first line pair 304 of the terminal. For the digital signal transmitted by the line pair 303, the second terminal line pair 304 will not affect the digital signal transmitted by the terminal first line pair 303, thereby increasing the stability of digital signal transmission and reverse power supply.

Referring to FIG. 9 , on the basis of the digital subscriber line terminal device 300B shown in FIG. 7 , a fourth digital subscriber line terminal device 300D is provided. The difference from the digital subscriber line terminal device 300B is that the digital subscriber line terminal device 300D further includes a terminal second isolation module 306, and the first end of the terminal second line pair 304 is connected to the terminal second isolation module 306. The terminal first line pair 303 is connected.

The second isolation module 306 of the terminal is configured to isolate the digital signal between the second line pair 304 of the terminal and the first line pair 303 of the terminal, so that the DC voltage signal transmitted by the first line pair 303 of the terminal passes through Reach the terminal second line pair 304 .

That is, the fourth type of digital subscriber line terminal device 300D is provided with both the terminal first isolation module 305 and the terminal second isolation module 306, so that each DC voltage signal provided by the power supply module 302 passes through the terminal second isolation module After an isolation module 305 reaches the first line pair 303 of the terminal, the DC voltage signal transmitted by the first line pair 303 of the terminal passes through the second isolation module 306 of the terminal and then reaches the second line pair 304 of the terminal, while the digital The signal will not be transmitted to the second wire pair 304 of the terminal, which further improves the stability of digital signal transmission and reverse power supply.

In the above embodiments, the terminal first isolation module 305 includes at least two inductors that are insulated from each other; or, at least includes two low-pass filters that are insulated from each other. The terminal second isolation module 306 includes two inductors that are insulated from each other; or, includes two low-pass filters that are insulated from each other. The selection of specific components depends on the actual design requirements, installation space and cost, and will not be repeated here.

At the same time, in order to conveniently control the on-off state of the connection between the second isolation module 306 of the terminal and the first line pair 303 of the terminal, the digital subscriber line terminal device 300C shown in FIG. 8 and the digital subscriber line terminal device 300D shown in FIG. A module with a control on-off function may also be provided, such as a terminal on-off module 308 , and the terminal second isolation module 306 is connected to the terminal first line pair 303 through the terminal on-off module 308 . The terminal on-off module 308 is used to control on-off of the connection between the terminal second isolation module 306 and the terminal first line pair 303 . The terminal on-off module 308 may be a plurality of switches combined in pairs and insulated from each other. For example, it is two switches insulated from each other, whereby when it is desired to disconnect the connection between the terminal second isolation module 306 and the terminal first wire pair 303 , it can be realized by opening the switch.

Similar to the central office on-off module 208, the terminal on-off module 308 can also be provided to the digital subscriber line terminal device 300A and the digital subscriber line terminal device 300B, and can also be arranged at other connection locations as required. For example, in the digital subscriber line terminal device 300A shown in FIG. 6, the terminal on-off module 308 is directly arranged between the second line pair 304 of the terminal and the first line pair 303 of the terminal; In the subscriber line terminal device 300B, the terminal on-off module 308 is arranged between the terminal first isolation module 305 and the terminal first line pair 303 . It can be seen that the terminal on-off module 308 can be set more flexibly according to needs. However, the embodiments of the present invention are only for illustration, and the present invention is not limited thereto.

Embodiment Three

Referring to Fig. 10, an embodiment of the present invention provides a digital subscriber line reverse power supply system 400, including the digital subscriber line central office device 200 provided in the first embodiment, and at least one digital subscriber line terminal provided in the second embodiment In the device 300, the terminal interface module 307 of each digital subscriber line terminal device is connected to the central office interface module 207 of the digital subscriber line central office device 200 through a first line pair 403 and a second line pair 404, and the first The line pair 403 corresponds to the terminal first line pair 303 of the terminal device 300 and the first line pair 203 of a central office end device 200 of the digital subscriber line, and the second line pair 404 corresponds to the digital subscriber line terminal The terminal second line pair 304 of the device 300 corresponds to a central office second line pair 204 of the central office device.

In order to ensure higher stability of digital signal transmission and reverse power supply, at least one side of the digital subscriber line central office device 200 and the digital subscriber line terminal device 300 is usually equipped with an isolation module. For example, the digital subscriber central device 200A, 200B, 200C or 200D cooperates with the digital subscriber terminal device 300D; another example, the digital subscriber central device 200B cooperates with the digital subscriber terminal device 300C; Cooperate with the subscriber terminal device 300B; as another example, the digital subscriber central office device 200D cooperates with the digital subscriber terminal device 300A, 300B or 300C; thereby forming a digital subscriber line reverse power supply system required by the user, please refer to Fig. 2 to Fig. 9.

In the embodiment of the present invention, the first central line pair 203 and the second central line pair 204 of the digital subscriber line central office device 200 are connected to the first terminal line pair 303 and the terminal second line pair of the digital subscriber line terminal device 300 The two wire pairs 304 are connected in one-to-one correspondence, and can simultaneously transmit a DC voltage signal, and the digital subscriber line terminal device 300 provides a DC voltage signal to the first wire pair 203 at the local end and the second wire pair 204 at the local end through the transmission line; The parallel transmission of DC voltage signals by wire pairs can reduce the resistance of the transmission line, increase the current in the transmission line, and thus obtain a greater reverse power supply distance.

It should be noted that the digital signals involved in the embodiments of the present invention may be signals generated by digital subscriber line technologies such as G.Fast, VDSL2/ADSL2/2+, or signals generated by other digital subscriber line technologies , no special provisions are made here.

Those skilled in the art should understand that the embodiments of the present application may be provided as methods, systems, or computer program products. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present application is described with reference to flowcharts and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the present application. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and a combination of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions may be provided to a general purpose computer, special purpose computer, embedded processor, or processor of other programmable data processing equipment to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing equipment produce a An apparatus for realizing the functions specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions The device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby The instructions provide steps for implementing the functions specified in the flow chart or blocks of the flowchart and/or the block or blocks of the block diagrams.

While preferred embodiments of the present application have been described, additional changes and modifications to these embodiments can be made by those skilled in the art once the basic inventive concept is appreciated. Therefore, it is intended that the appended claims be interpreted to cover the preferred embodiment and all changes and modifications that fall within the scope of the application.

Apparently, those skilled in the art can make various changes and modifications to the embodiments of the present application without departing from the spirit and scope of the embodiments of the present application. In this way, if the modifications and variations of the embodiments of the present application fall within the scope of the claims of the present application and equivalent technologies, the present application also intends to include these modifications and variations.

Claims (15)

1. a numeral subscriber line local side device, is characterized in that, comprises local side processing module, powered module, at least one road bureau end First Line hold the second line to drawn game end interface module to, at least one road bureau; Described local side First Line to described local side second line to one_to_one corresponding;

Described local side processing module is connected with described local side interface module by described local side First Line pair; Described powered module and described local side First Line are to being connected; The right first end of described local side second line is with corresponding described local side First Line to connection, and right the second end of described local side second line is connected with described local side interface module;

Described local side interface module, for provide described local side First Line to described local side second line to the interface being connected end side device;

Described local side First Line pair, transmits next d. c. voltage signal for transmission of digital signals, receiving terminal side and receives the described local side second line d. c. voltage signal next to transmission;

Described local side second line pair, for the d. c. voltage signal that the transmission of receiving terminal side comes, is transferred to described local side First Line pair by this d. c. voltage signal;

Described local side processing module, for the treatment of the digital signal of described local side First Line to transmission;

Described powered module, for receiving each d. c. voltage signal of described local side First Line to transmission, powers according to the device that each d. c. voltage signal is local side side.

2. local side device as claimed in claim 1, is characterized in that, also comprise local side first isolation module, described powered module by described local side first isolation module with described local side First Line to being connected;

Described local side first isolation module, for isolate described powered module and described local side First Line between digital signal, make described local side First Line to each d. c. voltage signal of transmission by the described powered module of rear arrival.

3. local side device as claimed in claim 2, is characterized in that, also comprise local side second isolation module, the right first end of described local side second line by described local side second isolation module with described local side First Line to being connected;

Described local side second isolation module, for isolate described local side second line pair and described local side First Line between digital signal, make described local side second line to the d. c. voltage signal received by the described local side First Line pair of rear arrival.

4. local side device as claimed in claim 3, is characterized in that, also comprise local side break-make module, described local side second isolation module by described local side break-make module with described local side First Line to being connected;

Described local side break-make module, for control described local side second isolation module and described local side First Line between the break-make that is connected.

5. local side device as claimed in claim 4, it is characterized in that, described local side break-make module comprises at least two switches insulated from each other.

6. the local side device as described in any one of claim 2 to 5, is characterized in that, described local side first isolation module at least comprises two inductance insulated from each other; Or, at least comprise two low pass filters insulated from each other.

7. the local side device as described in any one of claim 3 to 5, is characterized in that, described local side second isolation module comprises two inductance insulated from each other; Or, comprise two low pass filters insulated from each other.

8. a digital subscriber line terminal device, is characterized in that, comprise terminal processing module, supply module, terminal First Line to, terminal second line to and terminal interface module;

The described terminal First Line pair that described terminal processing module passes through is connected with described terminal interface module; Described supply module and described terminal First Line are to being connected; The right first end of described terminal second line is with described terminal First Line to being connected, and right the second end of described terminal second line is connected with described terminal interface module;

Described terminal interface module, for provide described terminal First Line to the described terminal second line pair interface be connected with local side side device;

Described terminal First Line pair, for transmission of digital signals, transmit a d. c. voltage signal that described supply module provides and to described terminal second line to transmission d. c. voltage signal;

Described terminal second line pair, for receiving the d. c. voltage signal of described terminal First Line to transmission, and provides this d. c. voltage signal to local side side device;

Described terminal processing module, for the treatment of the digital signal of described terminal First Line to transmission;

Described supply module, for described terminal First Line to providing a d. c. voltage signal.

9. terminal installation as claimed in claim 8, is characterized in that, also comprise terminal first isolation module, described supply module by described terminal first isolation module with described terminal First Line to being connected;

Described terminal first isolation module, for isolate described supply module and described terminal First Line between digital signal, the d. c. voltage signal that described supply module is provided is by the described terminal First Line pair of rear arrival.

10. terminal installation as claimed in claim 9, is characterized in that, also comprise terminal second isolation module, the right first end of described terminal second line by described terminal second isolation module with described terminal First Line to being connected;

Described terminal second isolation module, for isolate described terminal second line to and described terminal First Line between digital signal, make described terminal First Line to transmission d. c. voltage signal by rear arrival described terminal second line pair.

11. terminal installations as claimed in claim 10, is characterized in that, also comprise terminal break-make module, described terminal second isolation module by described terminal break-make module with described terminal First Line to being connected;

Described terminal break-make module, for control described terminal second isolation module and described terminal First Line between the break-make that is connected.

12. terminal installations as claimed in claim 11, is characterized in that, described terminal break-make module comprises at least two switches insulated from each other.

13. terminal installations as described in any one of claim 9 to 12, it is characterized in that, described terminal first isolation module at least comprises two inductance insulated from each other; Or, at least comprise two low pass filters insulated from each other.

14. terminal installations as described in any one of claim 10 to 12, it is characterized in that, described terminal second isolation module comprises two inductance insulated from each other; Or, comprise two low pass filters insulated from each other.

15. 1 kinds of reverse electric power systems of Digital Subscriber Line, it is characterized in that, comprise local side device as described in any one of claim 1 to 7 and at least one terminal installation as described in any one of claim 8 to 14, the terminal interface module of terminal installation described in each is connected with the local side interface module of described local side device with the second line pair by First Line, the terminal First Line of described First Line pair and described terminal installation to the local side First Line with described local side device to corresponding, terminal second line of described second line pair and described terminal installation to local side second line with described local side device to corresponding.