WO2009079818A1

WO2009079818A1 - A method and system for remotely managing a vdsl terminal device

Info

Publication number: WO2009079818A1
Application number: PCT/CN2007/003560
Authority: WO
Inventors: Tao Tong
Original assignee: Zte Corporation
Priority date: 2007-12-12
Filing date: 2007-12-12
Publication date: 2009-07-02

Abstract

A method for remotely managing a VDSL terminal device is used in the system which includes a terminal device management system, a global end device and a VDSL terminal device, the method includes the following steps: configuring a management VLAN at the global end device (S301); configuring a management interface at the global end device and adding the management interface to the management VLAN (S302); adding the user ports corresponding to the VDSL terminal device to a management VLAN port table (S303); after the VDSL terminal device establishes a connection, the terminal device management system manages the VDSL terminal device remotely by the management VLAN (S304). A system for remotely managing the VDSL terminal device is also provided. The present invention realizes another technology for remotely managing the VDSL terminal device except by low-speed EOC channel. The technology has the advantages of better transmission, good compatibility, and can be utilized conveniently and simply. The management and the traffic are separated completely.

Description

TECHNICAL FIELD The present invention relates to the field of broadband access technologies, and in particular, to a very high speed digital subscriber line.

(Very High Data Rate Digital Subscriber Line, VDSL) Remote management method and system for terminal equipment. BACKGROUND With the continuous development of broadband service networks, various broadband access technologies have increasingly demonstrated their important role in the "last mile" transmission bottleneck problem, and Digital Subscriber Line (DSL) technology has undergone Continuous development has considerable advantages in terms of deployment convenience and cost performance. It has become the main broadband access method on a global scale. In DSL technology, it is mainly divided into Asymmetric Digital Subscriber Line (ADSL), Single High Bit Rate Digital Subscriber Line (SHDSL), and Very High Speed Digital Subscriber Line (VDSL). With the maturity of technology and the decline of equipment prices, the deployment of ADSL lines in China has developed rapidly and become the most important access technology, but its extraordinary high-speed development has brought severe challenges to the operation and maintenance of the network. . The outstanding point is that the ADSL user terminal equipment needs to be configured, monitored, maintained, and upgraded according to the situation of the central office equipment. Management tasks such as troubleshooting are generally required by professionals to go to the door, which is costly and requires a lot of work. The operator hopes to realize the "on-demand management and on-demand troubleshooting" of the user terminal equipment through remote management means, that is, the remote configuration and monitoring of the user terminal equipment is realized by the operator's equipment management system under the condition that the ADSL line is activated. Functions such as maintenance and upgrades enable remote management and maintenance of user terminal equipment. In order to realize the rapid deployment of broadband users, conveniently implement data configuration, fast location and troubleshooting of user terminals, improve user satisfaction and average yield of broadband networks, some ADSL user terminal management technologies have emerged accordingly. The commonly used ADSL remote terminal management technology now has two types of technical solutions in the management channel implementation of the local management interface. The first type is based on the ATM (Asychronous Transfer Mode) Forum ILMI 4.0 and DSL Forum TR-037, and uses a permanent virtual connection on the management channel. ( permanent virtual circuit, PVC) is implemented. That is, the use of the ATM Adaptation Layer Type 5 (AAL5) data encapsulation PVC between the terminal equipment and the Digital Subscriber Line Access Multiplexer (DSLAM) and the terminal equipment. Channel interface (default VPI=0, VCI-16), management of operations such as configuration and query. The PVC management channel is divided into two, one is a basic PVC channel, and the other is an extended PVC channel. The PVC connection of the central office device DSLAM and the user terminal device is VPI=0, and the VCI=16 PVC connection is used as the basic PVC management channel, which is the initial channel of the central office DSLAM and the client device. The extended PVC channel is established by the central office DSLAM and the client through a basic PVC management channel to transmit service data flows such as software downloads. The second type is to use the ADSL technical specification ITU-T G.997.1 (Physical Layer Management Specification for DSL Transceiver) to define the Embedded Operational Channel (EOC) message, and pass the relevant management information message. The EOC channel is transmitted. Chinese patent application CN03121827.X discloses an xDSL terminal equipment management system, and its internal implementation is to realize remote management of xDSL terminals by using EOC channel.

The EOC management channel is also divided into two, one is the basic EOC management channel, and the other is the auxiliary data channel. The basic EOC management channel is a channel for transmitting Simple Network Management Protocol (SNMP) management information between the central office and the user terminal, and is always online; the auxiliary data channel is used to perform part of the management function. Data transfer, such as the data stream downloaded during software upgrade and the data flow during operation such as Ethernet Point-to-Point Protocol over Ethernet (PPPOE) or Internet Internet Explorer (PING) test. It is established by SNMP through the EOC management channel when needed. In the past one or two years, the high bandwidth of VDSL technology in the two-way symmetry and short if large range and the compatibility of VDSL2 and ADSL2+ have made VDSL widely concerned by chip suppliers, equipment manufacturers and network operators. Chips and devices are progressing rapidly, and the scope of application is constantly being promoted. However, the corresponding broadband operation and maintenance technology has not been developed correspondingly like ADSL, and its user volume is also increased with ADSL, which will face operation and maintenance. There are many problems, so it is urgent to keep up with a series of operation and maintenance technologies such as remote terminal management and version upgrade. As mentioned earlier, ADSL remote terminal management technology includes technical parties based on PVC management channels. And the technical solution based on EOC management channel, naturally people will think of adopting these two technical solutions in VDSL remote terminal management, but the technical scheme based on PVC management channel is only applicable to ADSL (ATM Over ADSL) based on ATM transmission mode or SHDSL (ATM Over SHDSL) based on ATM transmission mode, but not applicable to Ethernet over VDSL (Ethernet Over VDSL) technology, and when the remote version of the terminal is upgraded, it needs to be implemented by using a service channel, which will be used for users. The current business has an impact, causing certain problems for the actual use of the user. However, if the technical solution based on the EOC management channel is adopted in the remote management of the VDSL terminal, the following defects exist: Since the EOC channel itself lacks the flow control mechanism, its actual transmission performance needs to be checked; and since it is adopted between the central office equipment and the terminal equipment. EOC-based HDLC as a management channel requires modem (modem) chip-level support. In addition to software changes, hardware chip changes may be involved. Existing compatibility issues have a greater impact on existing devices, and implementation of the entire network is more difficult. When the remote version of the terminal is upgraded, the service channel is also required to be implemented. This will affect the user's current service and cause certain problems for the user's actual use. In order to avoid the above defects, it is not possible to adopt a PVC-based management channel and/or an EOC-based management channel in the VDSL terminal device remote management technology. In summary, the existing VDSL terminal equipment remote management technology obviously has inconveniences and defects in practical use, so it is necessary to improve. Summary of the invention

For the above-mentioned drawbacks, the object of the present invention is to provide a remote management method and system for a VDSL terminal device, which not only has good transmission performance and compatibility, but also is convenient and simple to use. In order to achieve the above object, the present invention provides a remote management method for a VDSL terminal device, which is used in a system including a terminal device management system, a central office device, and a VDSL terminal device, and includes:

A. Configure a management VLAN (Virtual Local Area Network) on the central office device. B. Configure a management interface on the central office and add the management interface to the management VLAN.

C. Add the user port corresponding to the VDSL terminal device to the port table of the management VLAN.

D. After the VDSL terminal device establishes a link, the terminal device management system remotely manages the VDSL terminal device through the management VLAN. According to the method of the present invention, the management interface configured on the central office device in the step B is a three-layer interface created to ensure TCP/IP (Transmission Control Protocol/Internet Protocol) layer interworking; and/or the step C The user port is stored in the port table of the management VLAN by label. According to the method of the present invention, the terminal device management system in the step D remotely manages the VDSL terminal device through a remote login protocol or a hypertext transfer protocol. According to the method of the present invention, the central office equipment is a digital subscriber line access multiplexer. According to the method of the present invention, the data flow that is remotely managed by the VDSL terminal device in the step D includes a downlink direction and an uplink direction, and the downlink direction includes the following steps:

Dl1. The terminal device management system sends the management package to the central office device through a remote management interface (RMI);

D12. The VDSL terminal device management module of the central office device performs proxy conversion on the management packet, and sends the converted management packet to the packet distribution processing module of the management interface of the central office device;

D13, the packet distribution processing module extracts the port information of the management package, and forwards the management packet to the transceiver packet processing module of the central office device; D14, the transceiver packet processing module checks whether the management packet carries a management VLAN tag, and if If the port is carried, the port corresponding to the management packet is searched through the port table of the management VLAN, and the management packet is sent to the user port through the management VLAN. The uplink direction includes the following steps:

After the user port of the central office device receives the data packet sent by the corresponding VDSL terminal device through the management VLAN, the transceiver packet processing module of the local office device checks whether the data packet carries the management VLAN tag, and if it is carried, searches for the management VLAN. Port table, forwarding the data packet to the management interface of the central office device;

D22, the packet distribution processing module of the management interface sends the data packet to the corresponding VDSL terminal device management module after adding the port information to the data packet; D23, the VDSL terminal device management module performs proxy conversion on the data packet, And sending the data packet to the terminal device management system through the remote management interface. According to the method of the present invention, the transceiver packet processing module of the central office device checks whether the management VLAN tag is carried by the 802.1Q tag in the management packet and/or the data packet. According to the method of the present invention, the step D further includes the terminal device management system performing the terminal version upgrade on the VDSL terminal device, including the following steps: After the El, VDSL terminal device establishes the link, the central office device receives the VDSL terminal device through the management VLAN. The reported trap message is started, and the VDSL terminal device information is extracted from the startup trap message, and the VDSL terminal device information is saved locally;

E2, the terminal device management system queries the central office device for the VDSL terminal device information, and selects a suitable terminal version according to the VDSL terminal device information, and delivers the terminal version upgrade command to the central office device;

E3. The central office device downloads the selected terminal version to the local device, and performs terminal version upgrade for all or part of the user ports of the port table of the management VLAN. According to the method of the present invention, the central office device in step D performs a batch upgrade on the terminal version of the user port; and/or adds a new user port in the port table being upgraded through the terminal device management system. According to the method of the present invention, the step E3 further includes:

E31. The central office device initializes a terminal version upgrade result and a state variable of the user port.

E32, the VDSL terminal device version upgrade module of the central office device downloads the selected terminal version to the local memory from the version server of the terminal device management system; E33, the VDSL terminal device version upgrade module of the central office device sequentially gives the port table of the management VLAN All user ports perform terminal version upgrades;

E34, the terminal device upgrade result updates the corresponding user port upgrade result and state variable until all user ports are upgraded. The present invention also provides a remote management system for a VDSL terminal device, including a terminal device management system, a central office device, and a VDSL terminal device, where the central office device is configured to configure a management VLAN and a management interface, and a management VLAN, where the central office device is further configured to add a user port corresponding to the VDSL terminal device to a port table of the management VLAN; The system is configured to remotely manage the VDSL terminal device through the management VLAN after the VDSL terminal device establishes a link. The invention realizes that the VDSL terminal device is remotely managed through the management VLAN by configuring the management VLAN on the central office device, and after the VDSL terminal device establishes the link, thereby realizing remote control of the VDSL terminal device through another low-speed EOC channel. The management technology has good transmission performance. Moreover, since all the VLANs supported by the Layer 2 switching device are used as the management channel, the compatibility is good and the use is convenient and simple. In addition, since a separate management VLAN is used as the management channel, management is realized. Complete isolation from the business, so that management operations have no impact on the actual business of the user. BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a structural diagram of a remote management system of a VDSL terminal device of the present invention; FIG. 2 is a structural diagram of a remote management portion of a VDSL terminal device of the present invention; FIG. 3 is a remote management of a VDSL terminal device of the present invention; Method Flowchart; Figures 4a-4d are flow charts of a remote management method for a VDSL terminal device in an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION In order to make the objects, technical solutions and advantages of the present invention more comprehensible, the present invention will be further described in detail below with reference to the accompanying drawings. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The basic idea of the present invention is to: configure a management VLAN on the central office device, and then the terminal device management system implements remote management of the VDSL terminal device through the management VLAN.

VLAN technology is to logically divide a local area network (LAN) device into network segments, or smaller LANs, to implement data exchange technology for virtual workgroups or units. Through this VLAN technology, the user terminal can conveniently and quickly set up a broadband network in the network without changing any hardware and communication lines, and it supports all Layer 2 switching devices. 1 is a structural diagram of a remote management system of a VDSL terminal device provided by the present invention, including a terminal device management system 101, a central office device 104, and a client VDSL terminal device 108. among them, The terminal device management system 101 is configured to remotely manage the VDSL terminal device 108 through the management VLAN after the VDSL terminal device 108 establishes a link. The terminal device management system 101 is composed of a terminal device management module 102 and a version server 103. The terminal device management system 101 can be integrated in an existing xDSL central office device management system, or can be an independent management platform provided by a corresponding xDSL central office device manufacturer connected by the DSL terminal device. The central office device 104 is connected to the terminal device management system 101 through a remote management interface, and the management interface is used to implement indirect management of the VDSL terminal device 103. The management channel between the central device and the terminal device management system 101 may be in-band or External management port. The central office device 104 is preferably a Digital Subscriber Line Access Multiplexer (DSLAM) for configuring a management VLAN and a management interface. The management interface is a three-layer logical interface in the DSLAM. Interworking at the TCP/IP layer. The address of the management interface is in the same network segment as the management interface address of the VDSL terminal device 108, and the management interface is added to the management VLAN. The IP address consists of the network number, subnet number, and host number. The meaning of the same network segment is that the network number and subnet number of the two IP addresses are the same, and the host number is different. There is no need to route through the routing between such two address hosts. As shown in FIG. 2, the management interface needs to complete the forwarding of the management package together with the packet distribution processing module 112 and the transceiver packet processing module 113, wherein the packet distribution processing module 112 is configured to extract the port information of the data packet/management packet in the downlink direction or Add port information to the packet/management packet in the upstream direction. The transceiver packet processing module 113 is configured to view an 802.1Q tag of the data packet/management packet to determine whether to carry a management VLAN tag, thereby searching a port table of the management VLAN, and forwarding the port. The central office device 104 is further configured to add a user port corresponding to the VDSL terminal device to the port table of the management VLAN. The central office device 104 further includes a VDSL terminal device management module 105, a VDSL terminal device version upgrade module 106, and a Layer 2 switching system 107. The VDSL terminal device management module 105 is responsible for performing necessary proxy conversion work on the management package or the data packet, such as performing remote login protocol (telnet) or Hypertext Transfer Protocol (HTTP) management on the VDSL terminal device 108. «Manage tasks and resources, and transfer data between sockets at the application layer. The VDSL terminal device version upgrade module 106 is responsible for downloading the VDSL terminal device 108 from the version server 103 to the central office device 104 through a File Transfer Protocol (FTP) 4 bar terminal version, and then transmitting the file through a simple file. The Trivial File Transfer Protocol (TFTP) downloads the terminal version to the VDSL terminal device 108. The VDSL terminal device version upgrade module 106 is also responsible for controlling the flow of multiple ports 4 and downloading the version and status of each port version. And reading the VDSL terminal device information carried in the trap (trap) message reported by the VDSL terminal device 108 for reading by the terminal device management system 101. Place The VDSL terminal device information includes but is not limited to: a VDSL terminal device software and hardware version number, a terminal device vendor information, and a terminal device physical number.

The VDSL terminal device 108 is connected to the central office device 104 through a local management interface, and the management channel between the two is a management VLAN. The local management interface is a three-layer logical interface created to ensure TCP/IP layer interworking. The management of the VDSL terminal device 108 is completed by the management VLAN. The VDSL terminal device 108 includes: a VDSL terminal device management entity 109, a VDSL terminal device version upgrade entity 110, and a Layer 2 switching system 111. As shown in FIG. 3, the remote management method of the VDSL terminal device provided by the present invention specifically includes: Step S301: Configure a management VLAN on the local office device DSLAM. Step S302: Configure a management interface on the local office device DSLAM, and add the management interface to the management VLAN. The management interface is a Layer 3 logical interface, and is used for interworking between the TCP/IP layer, and the address is in the same network segment as the management interface address of the VDSL terminal device. The management VLAN is a management channel between the central office device DSLAM and the VDSL terminal device. You can configure the management VLAN port table to store and find the user port, and then find the corresponding VDSL terminal device through the user port. Step S303: Add the user port corresponding to the VDSL terminal device to the port table of the management VLAN. Preferably, the user port is added to the port table of the management VLAN by means of a tag. Step S304, after the VDSL terminal device establishes the link, the terminal device management system remotely manages the VDSL terminal device through the management VLAN. The data flow of the terminal device management system for remotely managing the VDSL terminal device is divided into a downlink direction and an uplink direction. As shown in FIG. 2, the following steps are performed in the following direction: Step S401: The terminal device management system 101 is remotely managed by the terminal device management system 101. The interface sends the management packet to the central office device 104. Step S402, the VDSL terminal device management module 105 of the central office device 104 performs proxy conversion on the management packet and transmits it to the packet distribution processing module 112 of its management interface. Step S403, the packet distribution processing module 112 extracts the port information and forwards the management packet to the transceiver packet processing module 113. Step S404, the transceiver packet processing module 113 checks whether the management packet carries a management VLAN tag, and if so, searches for a user port corresponding to the management packet through a port table of the management VLAN, and sends the management packet to the user port through the management interface, thereby managing The packet is sent to the VDSL terminal device 108. The user interface and the management interface are both configured in the management VLAN. The transceiver processing module 113 checks whether the management VLAN tag is carried by using the 802.1Q tag in the management packet. In the uplink direction, the following steps are included: Step S501: After the user port of the central office device 104 receives the data packet sent by the corresponding VDSL terminal device 108, the transceiver packet processing module 113 checks whether the data packet is through the 802.1Q tag in the data packet. The management VLAN tag is carried. If yes, the port table of the management VLAN is searched and forwarded to the management interface of the central office device 104. Step S502, the packet distribution processing module 112 of the management interface adds the port information to the data packet, and then sends the port information to the VDSL terminal device management module 105. Step S503, the VDSL terminal device management module 105 performs proxy conversion on the data packet, and sends the data packet to the terminal device management system 101 through the remote management interface. The terminal device management system remotely manages the VDSL terminal device, and further includes the version upgrade of the VDSL terminal device. The specific steps are as follows: Step S601: After the VDSL terminal device establishes the link, the local office device DSLAM receives the startup reported by the VDSL terminal device through the management VLAN. A trap message, the trap message carries VDSL terminal device information, and extracts VDSL terminal device information from the trap message, and saves it locally. The VDSL terminal device information includes but is not limited to: a VDSL terminal device software and hardware version number, a terminal device vendor information, and a terminal device physical number. Step S602: After the terminal device management system queries the central office device DSLAM for the VDSL terminal device information, selects an appropriate version according to the VDSL terminal device information, and sends a version upgrade command to the central office device DSLAM. In step S603, the central office device DSLAM downloads the selected terminal version to the local device, and upgrades all or part of the user ports of the management VLAN port table to implement the upgrade of the corresponding user VDSL terminal device. The central office DSLAM can upgrade the terminal version of the user port in batches; and the terminal device management system can view the rise of each port terminal version at any time. In the case of the level, it is also possible to add a new user port that needs to download the terminal version to the port table being upgraded by the terminal device management system. 4a to 4d are flowcharts of an embodiment of upgrading a VDSL terminal device according to the present invention, including obtaining VDSL terminal device version information, responding to a terminal device management system for obtaining VDSL terminal device information, a version upgrade process, and responding to a terminal device management system to obtain a version. Upgrade status command. The process of obtaining the VDSL terminal device version information is as shown in FIG. 4a, and includes the following steps: Step S701: Establish a link between the central office device DSLAM and the user port. Step S702, receiving a startup trap message of the VDSL terminal device. Step S703, extracting VDSL terminal device information from the startup trap message and saving the information to the local. The process of obtaining the VDSL terminal setting command in response to the terminal device management system is as shown in FIG. 4b, including: !!: Step S711, the central office device DSLAM receives the acquiring terminal version command issued by the terminal device management system. Step S712, obtaining version information of the corresponding user port from the local. Step S713, returning a version information response packet to the terminal device management system through the remote management interface. As shown in FIG. 4c, the DSL terminal device version upgrade process includes the following steps: Step S721: The central office device DSLAM receives a version upgrade command of the terminal device management system. Step S722, the central office device DSLAM initializes the port version upgrade result and the state variable. Step S723: The central office device DSLAM downloads the version from the ftp version server to the local memory as an ftp client. In step S724, the central office DSLAM as a tftp client sequentially upgrades the user port in the management VLAN port table. The processing flow of its data packet is the same as that of the VDSL terminal equipment management system. Step S725, updating the upgrade result and the state variable of the corresponding user port according to the upgrade result. Step S726, determining whether all user ports are upgraded, if yes, proceeding to step S727, otherwise returning to step S724, continuing to perform version upgrade for the next user port. Step S727, releasing the local version memory. The process of obtaining the version upgrade status command in response to the terminal device management system is as shown in FIG. 4d, and is as follows: Step S731: The central office device DSLAM receives the version upgrade status command issued by the terminal device management system. Step S732, obtaining a version upgrade status of the corresponding user port from the local. Step S733, returning a version upgrade status response packet to the terminal device management system through the remote management interface. It is to be noted that the invention is equally applicable to remote management of other xDSL terminal devices. The invention configures a management VLAN on the central office device, and after the VDSL terminal device establishes a link, remotely manages the VDSL terminal device through the management VLAN, thereby realizing another VDSL terminal device through the idle EOC channel. The remote management technology has good transmission performance. Moreover, since all VLANs supported by Layer 2 switching devices are used as management channels, compatibility is good and easy to use. In addition, management VLANs are used as management channels to implement management. Complete isolation from the business, so that management operations have no impact on the actual business of the user. The invention may, of course, be embodied in a variety of other embodiments without departing from the spirit and scope of the invention. Changes and modifications are intended to be included within the scope of the appended claims.

Claims

Claim

A remote management method for a VDSL terminal device, which is used in a system including a terminal device management system, a central office device, and a VDSL terminal device, wherein the method includes the following steps:

A. configuring a management virtual local area network on the central office device;

B. The management interface is configured on the central office device, and the management interface is added to the management virtual office or network.

C. Add a user port corresponding to the VDSL terminal device to the port table of the management virtual local area network;

D. After the VDSL terminal device establishes a link, the terminal device management system remotely manages the VDSL terminal device by using the management virtual local area network.

2. The method of claim 1 wherein:

The management interface configured on the central office device in step B is a three-layer logical interface created to ensure TCP/IP layer interworking; and/or

The user port in step C is stored in the port table of the management virtual local area network in a label manner.

The method according to claim 1, wherein the terminal device management system in step D remotely manages the VDSL terminal device through a remote login protocol or a hypertext transfer protocol.

4. The method according to claim 1, wherein the central office equipment is a digital subscriber line access multiplexer.

The method according to claim 1, wherein the data flow that is remotely managed by the VDSL terminal device in the step D includes a downlink direction and an uplink direction, and the downlink direction includes the following steps:

Dl1, the terminal device management system sends the management packet to the central office device through a remote management interface;

D12. The VDSL terminal device management module of the central office device enters the management package into a line proxy conversion, and the converted management packet is sent to a packet distribution processing module of the management interface of the central office device;

D13, the packet distribution processing module extracts port information of the management packet, and forwards the management packet to a transceiver packet processing module of the central office device;

D14. The transceiver packet processing module checks whether the management packet carries a management virtual local area network label, and if so, searches for a user port corresponding to the management package by using the management virtual local area network port table, and passes the management package The management virtual local area network is sent to the user port;

The uplink direction includes the following steps:

After the user port of the central office device receives the data packet sent by the corresponding VDSL terminal device by using the management virtual local area network, the transceiver packet processing module of the local office device checks whether the data packet carries the management virtual local area network label. If the port is carried, the port table of the management virtual local area network is searched, and the data packet is forwarded to the management interface of the central office device;

D22, the packet distribution processing module of the management interface adds the port information to the data packet, and sends the data packet to the corresponding VDSL terminal device management module;

D23. The VDSL terminal device management module performs proxy conversion on the data packet, and sends the data packet to the terminal device management system through a remote management interface.

The method according to claim 5, wherein the transceiver packet processing module of the central office device checks whether the management virtual local area network label is carried by using the 802.1Q tag in the management packet and/or the data packet.

The method according to claim 1, wherein the step D further comprises the terminal device management system performing terminal version upgrade on the VDSL terminal device, comprising the following steps:

After the VDSL terminal device establishes the link, the central office device receives the startup trap message reported by the VDSL terminal device by using the management virtual local area network, and extracts the VDSL terminal device information from the startup trap message. The VDSL terminal device information is saved locally;

E2. The terminal device management system queries the central office device for the VDSL terminal device information, and selects a suitable terminal version according to the VDSL terminal device information, and Delivering a terminal version upgrade command to the central office device;

E3. The central office device downloads the terminal version to the local device, and performs terminal version upgrade on all or part of the user ports of the port table of the management virtual local area network.

The method according to claim 1, wherein the central office device performs a batch upgrade of the terminal version of the user port in step D; and/or manages the system at the port being upgraded by the terminal device. Add a new user port to the table.

The method according to claim 7, wherein the step E3 further comprises:

E31, the central office device initials <the terminal version upgrade result and the state variable of the user port;

E32, the VDSL terminal device version upgrade module of the central office device downloads the selected terminal version to the local memory from the version server of the terminal device management system;

E33, the VDSL terminal device version upgrade module of the central office device sequentially performs terminal version upgrade for all user ports in the port table of the management virtual local area network;

E34: The terminal device updates the update result and the state variable of the corresponding user port according to the upgrade result, until all the user ports are upgraded.

A system for implementing the method according to any one of claims 1 to 9, comprising a terminal device management system, a central office device and a VDSL terminal device, characterized in that:

The central office device is configured to configure a virtual local area network and a management interface, and add the management interface to the management virtual local area network, where the central office device is further configured to add a user port corresponding to the VDSL terminal device to the management. a port table of the virtual local area network; and the terminal device management system is configured to remotely manage the VDSL terminal device by using the management virtual local area network after the VDSL terminal device establishes a link.