114 results about "Ethernet over coax" patented technology

The invention discloses an Ethernet over coax (EOC) equipment self-discovery and self-configuration method based on an Ethernet passive optical network (EPON) and EOC technology for integrated network management. The EOC equipment self-discovery and self-configuration method comprises the steps that (S10) EOC equipment reports information and a connection relationship between the EOC equipment and an EPON system to an integrated network management system through an optical line terminal (OLT) of the EPON system; (S20) the integrated network management system issues basic configurations; (S30) the integrated network management system polls intercommunication management items and then issues configurations; (S40) the integrated network management system issues service configurations. According to the EOC equipment self-discovery and self-configuration method, the situation that an optical network unit (ONU) is topologically connected with the EOC equipment only in a manual manner for construction in the prior art is changed, and the network maintenance and management efficiency is improved.

Broadband connections of end users to the Internet are becoming more and more common today, and the most common types of these fast connections are ADSL and Cable modems. These connections are typically still very slow compared to the speeds that are expected in the next few years and typically also highly asymmetric and allow typically 750-2000 Kbit per second (most typically 1500 Kbit) for the downlink and typically for example 96 Kbit or 128 Kbit per second for the uplink (although standard ADSL can in principle support up to 8 Mbit per second download speed and up to 800 Kbit per second upload speed), based on the assumption that most users download much more data than they upload. However, for many users these limitations are highly undesirable, and these are for example home users or small businesses or organizations who want to use the connection also for example for VOIP (voice over IP) communications and / or Video-over IP communications and / or conferences and / or for example running web servers and / or for example various p2p applications, and in fact the low uplink also many times slows down the downlink due to the overhead needed for dealing with relatively small packets, so that any additional uplink by the user can severely limit the real downlink that can be achieved below the downlink bandwidth which the user is paying for. Actually ADSL is beginning to be replaced in some places by VDSL where the distance to the nearest street switchboard is about 1.2 Kilometers or less, which in principle allows up to 52 Mbit per second Download speed and up to 16 Mbit per Second Upload speed. However, these modems are expensive and are only slowly entering the market and only in a few countries. On the other hand there is no need to upgrade typical cable modems for enabling faster speeds, such as for example 20 Mbit downlink and 2 Mbit uplink, as is offered for example in France, when the ISPs start offering such speeds—since the typical common cable modem is already capable of such speeds. The present invention enables an improved Ethernet-over-coax solution which enables using one or a few very high speed modems, each for multiple users or apartments, preferably in combination with very cheap and very fast home networks (offering preferably at least up to 100 Mbit per second for each computer, preferably at full duplex), preferably based on the Cable TV coax cables, so that multiple computers can share the same internet connection for example in the same apartment and / or communicate between themselves. This preferably includes using a different frequency for the Ethernet-over coax channel for each computer in the apartment. Also shown are for example improved home networks using the second set of normally unused 2 phone wires and for example some improvement in HPNA networks, such as for example using HPNA also to connect between the street switchboard and the home or office instead of having to use also for example an ADSL or VDSL modem.

The invention provides a method for automatically discovering a coaxial broadband access head terminal, a method and a system for managing Ethernet over coax (EOC) terminal equipment. The method comprises the following steps: a first message carrying the basic information of the coaxial broadband access head terminal is multicast by the coaxial broadband access head terminal; and the coaxial broadband access head terminal is discovered after the first message is captured by an optical network unit (ONU); the automatic discovery of the EOC head end equipment can be finished by an optical line terminal (OLT) and network management according to the condition in no need of preconfiguring the equipment IP and the network management IP address; and the network overall topology structure of PON (passive optical network)+EOC can be dynamically displayed to finish the configuration and the management of the EOC head end and the EOC terminal, thus obviously lowering the complexity of PON+EOC network management, engineering starting and maintenance.

The invention provides an Ethernet over Coax (EoC) link failure detection system and an EoC link failure detection method. The EoC link failure detection system comprises EoC terminal equipment and management equipment, wherein the EoC terminal equipment captures a fixed number of data packets of a given type from user equipment, and counts the number of the captured data packets of the given type; and the management equipment receives a counting result from the EoC terminal equipment, performs analysis to determine whether to execute link detection between the EoC terminal equipment and the user equipment, and informs the EoC terminal equipment to detect a link failure between the EoC terminal equipment and the user equipment if a difference between the number of the data packets, captured by the EoC terminal equipment, of the given type and the fixed number is greater than a preset threshold value. By the system and the method, the depot rate of the EoC terminal equipment and the frequency of a maintainer going to a field for failure diagnosis can be reduced, failure processing efficiency is improved, and the maintenance cost of an operator and an equipment provider is decreased to a certain extent.

The invention provides a method for carrying out topology association on an optical network unit (ONU) and Ethernet over coax (EOC). The method comprises the following steps that: S1) an EOC process establishes a topology structural table of a coaxial cable Ethernet device; S2) an ONU process on the optical network unit carries out network communication with the EOC process through a loopback address; S3) the ONU process on the optical network unit compares the CBATMAC with a media access control (MAC) address list of a user network interface according to the topology structural table transmitted by the EOC process; and S4) the topology structural table between the optical network unit and the coaxial cable Ethernet device is established according to the comparison result. By the method, the EOC and the Ethernet passive optical network (EPON) are associated, and a topology structure among the ONU, CBAT and CNU can be obtained from an EPON network management system.

The invention discloses a reinforced EOC (Ethernet over Coax) terminal management system and a method thereof for a broadcast television network, and mainly aims to provide a reinforced EOC (Ethernet over Coax) terminal management system and method for the broadcast television network, which are supporting gateway type terminal management. Due to the adoption of the reinforced EOC (Ethernet over Coax) terminal management system and the method for the broadcast television network disclosed by the invention, the management of an extension module of a terminal through an automatic configurator is enhanced, and an EOC module agent of the terminal is used for forwarding an extension massage of the extension module for realizing management of a management entity on a physical entity.

The invention discloses a family intelligent terminal system which employs the embedded technology. Functions of network access, control and video decoding are integrated in an Ethernet over Coax (EOC) head end so as to realize a home intelligent gateway, the control of each terminal can and bear functions of three nets fusion businesses, such as VOIP (voice over internet protocol), IPTV( internet protocol television) and the like. There are interfaces for home security. A plurality of wired and wireless accesses, family comprehensive information managements and a multimedia processing center are formed. Many services can be provided for consumers, such as entertainment, information and intelligent control for extensible household electrical appliances.

The invention discloses an IPoE (IP (internet protocol) over Ethernet) user offline automatic detection system and an IPoE user offline automatic detection method. The method includes that EOC (Ethernet over Coax) terminal equipment is powered on prior to being registered to an EOC local side; the EOC local side reports the EOC terminal and user information to a CNU / CBAT (coaxial cable broadband access terminal) controller; the CNU / CBAT controller distributes IP addresses to users and replaces the EOC terminal to register to an AAA (authentication, authorization and accounting) server; when the EOC terminal is powered down, the EOC local side detects and sends user offline messages to the CNU / CBAT controller in real time; and the CNU / CBAT controller replaces the EOC terminal to send DHCP (dynamic host control protocol) Release information and recover the IP addresses. By the IPoE user offline detection method, management on abnormal user offline by the IPoE technology is simplified in an EOC system, and operators are guaranteed to authorize and count more rationally.

The invention discloses a wireless EoC (Ethernet over coax) terminal centralized management method. According to the method, a main chip at the EoC head end is used for building an Etherent II Ethernet two-layer data packet, MAC (media access control) addresses of equipment are used as an addressing mode for communication, the data of the Etherent II Ethernet two-layer data packet is partially defined into a command part, an index part, a length part and a data load part to form a management protocol, and the EoC head end utilizes the management protocol for operating WIFI (wireless fidelity) function modules of all wireless EoC terminals of the EoC head end. The method has the advantages that the EoC terminals realize the interaction with the WIFI function modules through the special management protocol, in addition, the WIFI function modules and EoC terminal modules connected with the WIFI function modules are associated, so that the WIFI function modules and the EoC terminal modules become a whole in the management aspect, then, the remote management of the wireless EoC terminal is realized through a top management interface, and finally, the problem of the unified management of the terminal WIFI part in the existing EoC technology is effectively solved.

The invention relates to the technical field of coaxial broadband access EOC (Ethernet over coax), and provides an Ethernet port VLAN (virtual local area network) configuration system and a method of EOC (Ethernet over coax) equipment. The system comprises an EOC manage main engine, an exchanger, EOC local sides and an EOC terminal, wherein the EOC manage main engine has the function of a WEB server, responses to the VLAN batch processing management of a manager, and transmits batches of VLAN configuration information to each EOC local side through the exchanger, after batches of VLAN management configuration is finished, allocation of VLAN ID is responded and realized between each EOC local side and the EOC terminal without participation of the EOC manage main engine, so that allocation of VLAN ID is simplified, and the configuration efficiency of VLAN is greatly improved by taking the principle of firstly allowing the EOC terminal to be on line, and configuring the EOC terminal VLAN firstly.

The invention relates to an EOC (Ethernet Over Coax) system. The invention discloses a method for realizing loop detection on an EOC device. The method comprises the followingconcrete steps that: a central office management device sets an identifier for each user terminal in succession; the identifiers of different user terminals are added in protocol messages sent by the central office management device; after receiving the messages, each user terminal activates a message filter mechanism which only allows the protocol message matched with the identifier of the user terminal to pass, and rejects all the other protocol messages; and when the central office management device receives the protocol message returned by the loop, the identifier in the message is checked so that the user terminal under which the loop is generated can be known. The invention can realize loop detection in all EOC systems and is dispensed with a special EOC chip to identify the source user terminal of the message, the system cost is reduced, and simultaneously, the detection efficiency and the practibility are improved.

The invention discloses an Ethernet over Coax equipment power control method and a device thereof. The method comprises the steps that: Ethernet over Coax EoC head end equipment detects line attenuation and signal performance of a signal sent by EoC terminal equipment; the EoC head end equipment judges, according to the detected signal performance and a preset signal performance threshold, whether power regulation of the EoC head end equipment is required, and regulates transmission power of the EoC terminal equipment according to the line attenuation and the signal performance of the EoC terminal equipment when the power regulation is required. According to the invention, the transmission power of the EoC terminal equipment can be automatically regulated by the EoC head end equipment according to the transmission power and the signal performance of the EoC terminal equipment, in order to reduce the interference with television signal in case of meeting certain signal performance.

The invention provides an equipment unified management method for an Ethernet passive optical network and Ethernet over coax (EPON+EoC) two-way cable access network. The method comprises the following steps that: an Ethernet over coax (EoC) high performance switch transmits a registration request to Ethernet passive optical network (EPON) local side optical line terminal equipment based on a group management protocol; after receiving the registration request, information transfer equipment attaches identification information and the physical connection topology information of equipment managed by the information transfer equipment to the registration request and uploads the registration request; and after the EPON local side optical line terminal equipment receives the registration request attached with the physical connection topology information, the EPON local side optical line terminal equipment calculates a corresponding management address according to the physical connection topology information comprised by the registration request and a preset address calculation method, and transmits the management address to the EoC high performance switch, so that the EoC high performance switch correspondingly sets the management address of the EoC high performance switch; therefore, the unified management of the EPON local side optical line terminal equipment is realized, and the physical connection topology of high performance switch (HS) equipment can be automatically discovered.

The invention relates to an EoC (Ethernet Over Coax) network equipment management system based on a simple network management protocol. The system comprises local end equipment and a plurality of terminal equipment, wherein the terminal equipment is connected with the local end equipment by an EoC network; and each kind of terminal equipment comprises a network topological graph generating module, a display module, a terminal storage module, a terminal control module and a terminal network connecting module. The invention also provides a method for realizing EoC network equipment management based on the simple network management protocol by utilizing the system. By adopting the EoC network equipment management system based on the simple network management protocol, when the EoC network is accessed into new terminal equipment, a basic information broadcast packet is transmitted to the local end equipment; after the local end equipment receives the broadcast packet, the basic information of the new terminal equipment is stored into the local end storage module, and the network topological graph generating module generates new terminal topological graph display, therefore, the reading time of the configuring information of the terminal equipment is greatly shortened and better use experience is brought to a user.

The invention provides an EHz ultrafast modulation pulse scanning laser and a distributed optical fiber sensing system. A doped optical fiber is carved with a plurality of phase shift gratings with different central window wavelengths, and the wavelength interval between adjacent central window wavelengths is a preset fixed value; when pump light emitted by a pump laser source enters the doped optical fiber through the coupling of a wavelength division multiplexer, the phase shift gratings carved on the doped optical fiber can generate multi-wavelength single-mode narrow-linewidth laser with the wavelength interval of the preset fixed value; and then, the ultrafast modulation is finished by a time domain control method based on EOM (Ethernet over coax) to obtain internal variable frequencypulse light formed by continuously splicing a plurality of pulse lights with linearly increasing frequencies, thereby forming the EHz ultrafast modulation of the distributed feedback fiber laser. Therefore, the coherence length of output laser can be increased on the premise that the laser frequency is unchanged, and the problem that the existing distributed optical fiber sensing system is restricted in high spatial resolution, long distance and high frequency band can be effectively solved.

The invention discloses an integrated soft intelligent equipment server for an intelligent substation, belonging to the technical field of the intelligent substations. The integrated soft intelligent equipment server is technically characterized by comprising intelligent Ethernet controllers EOC (Ethernet Over Coax), a complex programmable logic device (CPLD), an FLASH transient memory, a digital signal processing unit (DSP), a first double port random memory (RAM), a second double port random memory (RAM), an operation control subsystem and an overhaul monitoring subsystem, wherein the operation control subsystem comprises a first Ethernet controller and an operation master control module; and the overhaul monitoring subsystem comprises a second Ethernet controller and a production master control module. According to the integrated soft intelligent equipment server disclosed by the invention, the advantages of distribution type and integrated type are fused, so that the cost is remarkably reduced, network nodes are reduced, a communication network is simplified and the openness, the reliability and the economy of an intelligent system are improved; and in addition, the interoperability among various intelligent electronic devices (IED) is seamlessly realized.

This invention provides a network transmission equipment based on EOC. The network transmission equipment comprises a front-end network equipment, an EOC equipment, an EOC node computer and a receiver; the network equipment is in a communication connection with the EOC equipment through a cable; the EOC equipment is in a communication connection with the EOC node computer through a coaxial cable; the EOC node computer is in a communication connection with the receiver through an optical port or an electric port; the EOC node computer or the EOC equipment can supply power to each other through the coaxial cable; signals on the coaxial cable are transmitted through a protection module, a filter isolation module, a signal amplifying module and a coding / decoding module in sequence; the filter isolation module is used for filtering interference; the signal amplifying module is used for transmitting the signals remotely; a data analog converter used for reciprocally converting analog signals and digital signals is arranged between the signal amplifying module and the coding / decoding module; and the coding / decoding module is used for coding / decoding the digital signals. The network transmission equipment can smoothly solve wiring and transmission problems, can supply power coaxially, and can improve the network transmission performance.

The invention discloses a triple play broadband access equipment embedded management method. In the method, intensive study is made based on the research and development of a plurality of products such as optical network unit (ONU), multimedia over coax alliance (MOCA), home plug power line alliance Ethernet over coax (HomePlug EOC) and the like, an isomerism-oriented extensible embedded method for a plurality of pieces of fiber access equipment is researched and developed based on general characteristics in the functions of a plurality of pieces of broadband access equipment of triple play, and unified management over the plurality of pieces of equipment such as the ONU, EOC, a Cable Modem, a local area network and the like can be realized.

The invention relates to a self-loop detection system and method, and in particular relates to an EOC (Ethernet over coax) self-loop detection system and method. The EOC self-loop detection system comprises a head end device and a terminal module, wherein the head end device and the terminal module are communicated, the terminal module comprises a protocol device, an exchange device and a detection controller, the head end device is connected with the exchange device through the protocol device, and the detection controller is respectively connected with the protocol device and the exchange device; therefore, the terminal module is provided with a self-loop detection control circuit so that the communication of an EOC terminal generating a self-loop situation with an EOC head end can be immediately interrupted when the terminal module generates the self-loop situation, and the influence on the communication connection of the EOC terminals of other users with the EOC head end generated due to paralysis of the EOC head end is avoided; and meanwhile, information of the EOC terminal generating the self-loop situation can be precisely transmitted to a system maintenance system so that the maintenance of the system is facilitated.

The invention discloses a method and equipment for controlling access of users. The method includes that an EOC (Ethernet over coax) head-end apparatus monitors data transmission states of EOC terminals after receiving registration request messages from the EOC terminals; when the EOC head-end apparatus monitors that the EOC terminals start transmitting data, the EOC head-end apparatus distributes connecting resources to the EOC terminals. When in use of the method, bandwidth cannot be occupied by the idle EOC terminals, and accordingly, connecting resources and bandwidth resources can be saved to the greatest extent.

The invention provides a next generation broadcasting network (NGB) access network architecture system and a butt joint method of an Ethernet over coax (EOC) network management system and a business operation support system (BOSS). The NGB access network architecture system comprises a business management system, an authentication management system connected with the business management system, a call-center system connected with the authentication management system, three China national ratio (CNR) servers which are connected with the authentication management system and respective serve customer terminal equipments with the types of cable modems, personal computers and set top boxes, and a simple network management protocol (SNMP) management system which is connected with the authentication management system and used for carrying out SNMP configuration on the various customer terminal equipments; and the architecture system also comprises a butt joint management system used for taking part in the butt joint with the authentication management system so as to complete authentication, optical line terminal management equipment connected with all the CNR servers and the SNMP management system, EOC local side management equipment connected with the optical line terminal management equipment, and customer terminal access equipment connected with the EOC local side management equipment. The architecture system and the butt joint method enable all EOC access technologies to be suitable for the BOSS, thus reducing the butt joint cost and the technical risk, and reducing the access difficulty.

The invention provides an Ethernet over coax (EOC) energy saving method based on an Ethernet passive network over coax (EPOC). The EOC energy saving method includes that: a communication line terminal (CLT) is used for detecting uplink data and downlink data flow information of a CNU to determine whether the CNU can enter the energy saving state; when the CNU enters the energy saving state under control of the CLT, the CNU closes a transceiver arranged between the CNU and the CLT; after the CNU reaches a dormancy interval, the CNU automatically enters an awakening state and waits awakening authorization transmitted by the CLT; and when the CLT detects that the CNU should quit the energy saving state, the CLT transmits the awakening authorization to the CNU and then receives uplink data of the CNU. The EOC energy saving method is based on unified management and scheduling on the CNU carried out by the CLT, achieves automatic adjustment of the CNU state, and achieves the purpose of energy saving.

The invention belongs to the field of broadcast television, relates to a coaxial-cable Ethernet over coax (EOC) design, and in particular relates to a coaxial-cable EOC system with an upgrade function and a control method thereof. The coaxial-cable EOC system comprises an optical network unit (ONU), an optical receiver, an EOC headend device, an EOC terminal device and a spliter. The EOC terminal device is in no need of dismantling and reallocating, the numbers of the EOC headend devices and switchboards are not increased, or the EOC headend device and the EOC terminal device are not replaced, thus the bandwidth is increased in accordance with requirements so as to support a user to open more services. The optimal coaxial-cable EOC design provided by the invention is provided with the grading capacity-expending capacity and is easy to upgrade.

The invention discloses a method for bandwidth allocation, which includes the following steps: a token bucket corresponding to every uplink service set for each CNU of an Ethernet over Coax is arranged; during the period of uplink transmission, each CNU renews the numbers of the tokens in the bucket according to the corresponding parameter of the Service Level Agreement (SLA) of every uplink service, then, a REPORT message carrying the information of uplink service traffic flow is formed according to the number of the tokens in the bucket corresponding to the uplink service, and the report is transmitted to the CLT of Ethernet over Coax; according to the REPORT message of each CNU, the CLT distributes the uplink bandwidth for each CNU. The invention also discloses a system for CNU, CLT and distribution. The invention ensures an appropriate allocation of uplink bandwidth to every CNU, thus improving the utilization rate of the uplink bandwidth.

The invention discloses a quality of service (QOS) strategy realizing method based on an Ethernet over coax (EOC) terminal, and relates to the technical field of Ethernet signal transmission on a coaxial cable. The QOS strategy realizing method concretely comprises the following steps that: firstly, a QOS strategy base based on each EOC terminal facility is configured, and the QOS strategy base is placed in an EOC local side facility and comprises terminal facility identification information and QOS strategies corresponding to the terminal facility identification information; and after the QOS strategy base of each EOC terminal facility is configured, the EOC local side facility receives user data streams, then, the two-layer information in messages is analyzed, and the QOS strategy base is inquired according to terminal facility identification information in the two-layer information, so the QOS strategies corresponding to the terminal facility are obtained. The QOS strategies based on each terminal facility is realized in an EOC system, so the local side facility only concerns each connected terminal equipment and does not need to concern user facility information connected under the terminal facility, the implementation difficulty of the QOS strategies is reduced, the configuration work of the QOS strategies is simplified, and the system operation speed is accelerated.

The invention relates to an upgrading method for EOC (Ethernet Over Coax) terminal equipment. The terminal equipment comprises a coaxial cable interface unit, a master chip unit and an Ethernet interface unit which are in sequential connection; the coaxial cable interface unit is connected with an EOC local side equipment through a coaxial cable; the Ethernet interface unit comprises an Ethernet exchange chip and an Ethernet interface; and the Ethernet interface is connected with the master chip unit through the Ethernet exchange chip. The upgrading method comprises the following steps: the local side equipment sends upgrading data information to the terminal equipment, and the terminal equipment receives and then stores the upgrading data information; the terminal equipment is re-started; and the terminal equipment reconfigures the Ethernet exchange chip according to the upgrading data information. By adopting the upgrading method for the EOC terminal equipment, the EOC terminal equipment can automatically upgrade, so that the maintenance cost of the terminal equipment is greatly saved and further popularization and application of the EOC technology are facilitated.

An EOC terminal belongs to the technical field of cable televisions. The EOC terminal comprises a radio frequency connector, a data exchange chip, a wireless routing integrated unit, a wireless radio frequency interface and a wireless transmission antenna, the CABLE interface of the radio frequency connector is connected with an EOC local side, the TV interface of the radio frequency connector is connected with the radio frequency interface of a cable television set top box, the DATA interface of the radio frequency connector is connected with the data exchange chip, the wireless routing integrated unit comprises a wireless routing integrated chip, the PHY (physical) interface of the wireless routing integrated chip is connected with the data exchange chip, the WAN (wide area network) interface of the wireless routing integrated chip is connected with the wireless radio frequency interface, and the wireless radio frequency interface is connected with the wireless transmission antenna. The EOC terminal has the advantages that the EOC terminal can be added on the side of an existing reserved set top box, consequently, smooth upgrading is realized, and the initial investment cost is saved; the EOC terminal can be mounted on demand, so that the invested cost of an operator can be reduced; the wireless home coverage of cable televisions and wired Internet access is perfectly realized; and the EOC terminal is adapted to the access of a variety of networks.

The invention relates to a method and device for authenticating a terminal as well as an EOC (Ethernet over Coax) terminal. The method for authenticating the terminal comprises the following steps of: acquirement: acquiring characteristic domain information of the EOC terminal and first encryption control domain information which is prestored in the EOC terminal and generated according to a preset key and encryption algorithm based on the characteristic domain information; calculation: generating second encryption control domain information according to the preset key and encryption algorithm based on the characteristic domain information; and authentication: judging whether the first encryption control domain information and the second encryption control domain information accord with the preset authentication passing rule or not, allowing the EOC terminal to pass the authentication if the first encryption control domain information and the second encryption control domain information accord with the authentication passing rule; or otherwise, not allowing the EOC terminal to pass the authentication. The invention can achieve the purpose of carrying out the authentication control on the terminal on the basis of not increasing the terminal cost.

The invention discloses a multimedia network communication comprehensive experiment system, comprising a digital television system, a campus network, a router, an SDH (synchronous digital hierarchy) transmission looped network, a comprehensive service support platform and an IPTV (internet protocol television) network; the existing digital television laboratory is used for providing a signal source, the signal is scheduled by using an IP (internet protocol) packaging technology and the configuration of a service gateway, an HFC (Hybrid Fiber Coaxial)-based and full-IP network bearing mode is established for transmission, networking technologies of EPON (Ethernet passive optical network), EPON+LAN (local area network), EPON+WALN (wireless local area network), EPON+EOC (Ethernet over coax) and the like are adopted at the access end, and finally the aim of providing services such as television, broadcasting, interactive television, internet accessing, voice and message service are provided for a user at the terminal. The invention aims to establish an opening experiment education system which integrates specialty, comprehensiveness and openness, has excellent software environment and advanced hardware environment and can perform comprehensive training on the scientific spirit, the practical capability and engineering attainment of students.

The invention provides a method for realizing loopback detection of an EoC network. The method is characterized in that the EoC network loopback automatic detection is carried out by transmitting a loopback detection message, and the network storm can be obviated by force a terminal generating the loop off the line. According to the invention, the method can effectively lower the possibility of occurrence of storm in the entire EoC network so as to ensure the normal operation of the network business. Meanwhile, the difficulty in detecting the loopback network can be lowered effectively by recording and reporting the loop information, thereby enhancing the maintenance and management ability of the EoC network.