KR100726576B1 - Wavelength division multiplexer - passive optical network system for FTTH - Google Patents

Abstract

Disclosed is a wavelength division multiplexing passive optical subscriber network system of the present invention.

The wavelength division multiplexing passive optical subscriber network system of the present invention integrates data of different characteristics received through a plurality of networks providing different services, converts them into Ethernet frames of a predetermined band, and converts the Ethernet frames of the predetermined band. A WDM access device converting the wavelengths into wavelengths corresponding to the subscribers to transmit the corresponding service and then multiplexing the wavelengths and outputting the wavelengths through a single optical fiber; A broadband light source module for amplifying a light source and supplying it to the WDM access device for a long distance transmission of an optical signal output from the WDM access device; A passive optical branch combiner for branching the multiplexed optical signal output from the WDM access device for each wavelength and multiplexing optical signals of different wavelengths received to the WDM access device; And extracting the Ethernet frame of the predetermined band from the optical signal having a specific wavelength branched from the passive optical splitter, and separating and processing the extracted Ethernet frame according to the characteristics of the frame, and transmitting the signal to a corresponding subscriber station; Equipped with WDM subscriber equipment that performs the reverse function, guaranteeing each subscriber at least 100Mbps transmission band, HDTV-class IP-TV, VoD / EoD video service, high-quality video phone service and high speed internet service as well as existing phone Service and leased line services can be provided.

Description

FTH type wavelength division multiplexing passive optical network system {Wavelength division multiplexer-passive optical network system for FTTH}

1 is a block diagram showing the overall configuration of a wavelength division multiplexing passive optical subscriber network system according to the present invention.

FIG. 2 is a detailed configuration diagram showing the configuration of the WDM access device 100 in FIG. 1 in more detail.

3 is a detailed block diagram showing the configuration of each WDM subscriber unit 400 of FIG.

The present invention relates to a wavelength division multiplexing passive optical subscriber network (WDM-PON), and more particularly, after assigning a specific wavelength to each subscriber, using a WDM optical transmission function and its reverse function, a video service, a video telephony service, and a high speed service. The present invention relates to a wavelength division multiplexing passive optical subscriber network system that integrates and provides Internet services, POTS voice telephony, and dedicated line services.

The access network subscriber service has recently evolved from telephone or high-speed internet service to triple play service (TPS), which provides a combination of voice, data, and video services. Efforts are being made to develop passive optical subscriber network devices (A / E-PON: ATM / Ethernet-Passive Optical Network).

To provide high-speed, high-quality TPS, a technology and a device that guarantees a transmission bandwidth of up to 100Mbps, while guaranteeing at least 60Mbps per subscriber, are required. However, existing devices have a problem in that they do not guarantee a bandwidth of substantially 100Mbps due to the sharing effect (A / E-PON) per subscriber or around 10Mbps.

Ethernet switch is generally composed of connection switch, subscriber switch, etc., and each switch has aggregation function to multiplex subscriber traffic, so it does not meet minimum bandwidth guarantee requirement for TPS FTTH (FTTH). Existing time division multiplexing (TDM) based services such as plain old telephone service and leased line are not acceptable. In addition, Ethernet switch network has a significant problem that must be installed in the subscriber network, such as a power supply facility.

Passive optical subscriber networks include ATM and Ethernet passive optical subscriber networks. However, this passive optical subscriber network has a technical feature that all the subscribers share a single wavelength, so that in case of an uplink, a time slot is assigned to each subscriber to exclude collisions between the subscribers. For this reason, it is difficult to secure a minimum guaranteed bandwidth (60 Mbps) for TPS per subscriber or in order to secure it.

Accordingly, an object of the present invention in view of the above-mentioned problems is to allocate a specific optical wavelength to each subscriber and to configure a subscriber network as a passive optical device to guarantee a bandwidth of 100Mbps for providing TPS per subscriber, thereby providing voice, data, HD video service, and video. To implement a WDM passive optical subscriber network system that can provide services such as telephone over a single fiber.

In order to achieve the above object, the wavelength division multiplexing passive optical subscriber network system of the present invention integrates data of different characteristics received through a plurality of networks providing different services and converts them into Ethernet frames of a predetermined band. A WDM access device converting the Ethernet frame of a predetermined band into an optical wavelength corresponding to a subscriber to transmit a corresponding service, and then multiplexing the optical wavelengths and outputting the same through a single optical fiber; A broadband light source module for amplifying a light source and supplying it to the WDM access device for a long distance transmission of an optical signal output from the WDM access device; A passive optical branch combiner for branching the multiplexed optical signal output from the WDM access device for each wavelength and outputting the multiplexed optical signals having different wavelengths and transmitting the multiplexed optical signals to the WDM access device; And extracting the Ethernet frame of the predetermined band from the optical signal of a specific wavelength received by branching from the passive optical coupler, classifying the extracted Ethernet frame according to the characteristics of the frame, and transmitting the signal to the corresponding subscriber station. And a WDM subscriber station performing the function and its reverse function.

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

1 is a block diagram showing the overall configuration of a wavelength division multiplexing passive optical subscriber network system according to the present invention.

The wavelength division multiplexing passive optical subscriber network system of FIG. 1 configures an access network with an FTTH network structure in which an optical signal of a specific wavelength allocated to each subscriber is transmitted to an optical fiber to a subscriber's home.

The wavelength division multiplexing passive optical subscriber network system of FIG. 1 includes a WDM access device (OLT: Optical Line Terminator, 100), a broadband light source module (BLS: Broadband Light Source, 200), a passive optical coupler (300), and a WDM subscriber device. (ONT: Optical Network Terminator, 400).

The WDM access device 100 is installed in a telephone station, connected to Kornet / MPLS (Multi Protocol Label Switching) network, BcN (Broadband convergence Network) and Gigabit Ethernet, and to PSTN and Digital Cross-connect System (DCS) network and E1 frame. Connected. The WDM access device 100 integrates data received through each of the connected networks, converts the data into Ethernet frames of a predetermined band (100 Mbps), converts them into optical signals having a wavelength assigned to the subscriber, and then converts the converted optical signals. Multiplexes the signals by wavelength division multiplexing and transmits them through a single optical fiber and vice versa. The WDM access device 100 has a plurality of WDM subscriber device 400 is connected in a point-to-multipoint.                     

Here, HDTV-class video service and high-speed internet service are connected to Kornet / MPLS network, HD-based broadcast service, video on demand (VoD) such as movies, educational video on demand (EoD) such as education content, and general web , Mail, etc. The video phone service is connected to the BcN network to provide not only voice but also video with the conversation partner, and the dedicated line service is connected to the DCS network by being multiplexed / demultiplexed to the channel bank E1. The general telephone service is connected to the V5.2 switch network (PSTN) and E1.

The broadband light source module 200 amplifies the light source of the optical signal to be transmitted from the WDM access device 100 to the WDM subscriber devices 400. That is, the broadband light source module 200 amplifies the light source for long distance (about 20 km) light transmission between the WDM access device 100 and the WDM subscriber devices 400 and supplies it to the WDM access device 100.

The passive optical splitter combiner 300 demultiplexes the multiplexed optical signal transmitted from the WDM access device 100 through a single optical fiber for each wavelength and branches it to a plurality of channels to transmit to the WDM subscriber device 400 in each subscriber's home. do. The passive optical splitter combiner 300 multiplexes optical signals transmitted from each WDM subscriber station 400 and transmits the multiplexed optical signals to the WDM access device 100 through a single optical fiber.

The WDM subscriber unit 400 is installed in each subscriber's premises, extracts an Ethernet frame from an optical signal of a specific wavelength transmitted by being branched by the passive optical coupler 300, and classifies the extracted Ethernet frame according to the type of signal. Signal processing to provide the corresponding subscriber station. The WDM subscriber device 400 is connected to a subscriber station such as a subscriber's home gateway, set top box (STB) or PC.

FIG. 2 is a detailed block diagram showing the configuration of the WDM access device 100 in FIG. 1 in more detail.

The WDM access device 100 includes an Ethernet L3 (Layer 3) switch unit 110, a TDM E1 processor 120, a V5.2 E1 processor 130, a plurality of Ethernet L2 (Layer 2) switch units 140, and a plurality of switches. Two WDM optical transmitter / receivers 150, an OLT passive optical coupler 160, an OLT clock processor 170, and an OLT controller 180.

The Ethernet L3 switch 110 has a plurality of Ethernet Gigaports and is externally connected to a Kornet / MPLS network and a BcN, and internally connected to the TDM E1 processing unit 120 and the V5.2 E1 processing unit 130. Connected. The Ethernet L3 switch 110 is connected to the Ethernet L2 switch 140 through Gigabit Ethernet, and is received from the Cornet / MPLS network, BcN, the TDM E1 processing unit 120 and the V5.2 E1 processing unit 130. The frame is converted into a gigabit Ethernet frame and transmitted to the Ethernet L2 switch 140. Gigabit Ethernet is a local area network standard with a data rate of 1 gigabit per second (billion bits), which is defined as a standard in IEEE 802.3.

In addition, the Ethernet L3 switch 100 transmits an Ethernet frame received according to the type of service of each subscriber received from the Ethernet L2 switch 140 to a corresponding core network (Kornet / MPLS network or BcN) and the TDM E1 processing unit 120. ) Or V5.2 E1 processing unit 130. That is, the Ethernet L3 switch 100 is an Ethernet frame for HDTV-class video service, high-speed Internet service, and video telephony service as a corresponding core network among Kornet / MPLS network and BcN, and a dedicated line Ethernet frame is a TDM E1 processing unit ( 120, the voice Ethernet frame is switched to the V5.2 E1 processor 130, respectively. At this time, the dedicated line Ethernet frame and voice Ethernet frame is converted into a 64Kbps-class Ethernet frame from the Gigabit Ethernet frame is switched to the TDM E1 processing unit 120 and V5.2 E1 processing unit 130 and transmitted.

In addition, the Ethernet L3 switch 110 classifies the traffic of the subscriber by class to satisfy the quality of service (QoS) according to the characteristics of each traffic being switched, prioritization, DiffServ DSCP (DiffServ Code Point) It performs functions such as processing.

The TDM E1 processing unit 120 is connected to the DCS network and the E1 frame for the dedicated line service, converts the E1 frame received through the DCS network to the DS0 (64Kbps) level, and converts the Ethernet frame into an Ethernet L3 switch (110). ) And vice versa.

The V5.2 E1 processor 130 is connected to the V5.2 exchanger through the PSTN network to process the V5.2 protocol, converts 64 Kbps voice PCM (Pulse Code Modulation) data into an Ethernet frame and converts it into an Ethernet L3 switch 110. It performs the function of transmitting and its reverse function.

Each Ethernet L2 switch unit 140 is connected to the Ethernet L3 switch unit 110 by a gigabit Ethernet, and downwards by switching the Gigabit Ethernet frame received from the Ethernet L3 switch unit 110 into a 100Mbps class Ethernet frame. Ethernet signal is transmitted to the WDM optical transmitter / receiver 150, which transmits the optical signal of the wavelength allocated to the subscriber, and the Ethernet 100 is multiplexed with a 100 Mbps Ethernet frame received from each WDM optical transmitter / receiver 150 to a gigabit Ethernet frame. Transmission to the switch unit 110. The Ethernet L2 switch unit 140 checks the destination address of each Ethernet frame received from the Ethernet L3 switch unit 110 and then determines an output port by referring to an address mapping table, and switches if possible to transmit to the corresponding output port. The received frames are transmitted to the corresponding WDM optical / transmitter 150 through the corresponding output port.

Each WDM optical transmitting / receiving unit 150 receives a light source amplified from the broadband light source module 200 and uses a light source received to assign a 100Mbps Ethernet frame received from the Ethernet L2 switch unit 140 to a corresponding subscriber. It converts and outputs an optical signal of a wavelength and performs the reverse function.

Each OLT passive optical coupler 160 is provided in one-to-one correspondence with the Ethernet L2 switch unit 140, and an optical signal received from a plurality of WDM optical transmitter / receivers 150 corresponding to each Ethernet L2 switch unit 140. The wavelength division multiplexed to output the passive optical coupler 200 through a single optical fiber. Each OLT passive optical coupler 160 demultiplexes the multiplexed optical signal received from the passive optical coupler 200 and transmits the multiplexed optical signal to the corresponding WDM optical transmitter / receivers 150.

The OLT clock processor 170 generates all the clock signals necessary for the operation of the system by using the reference signals of each mode such as external synchronization, internal synchronization, and loop synchronization, and supplies them to the components of the WDM access device.

The OLT control unit 180 initializes each component in the WDM access device 100, performs maintenance functions such as alarm / failure processing, performance monitoring, device control, and CIT through access ports on the front and rear of the device. It provides operational functions through (Craft Interface Terminal) or Operating System (OSS). In addition, the WDM access apparatus 100 controls the overall operation of the WDM access apparatus by providing an interworking connection function with a higher operating system such as an NMS.

3 is a detailed block diagram showing in detail the configuration of each WDM subscriber unit 400 of FIG.

Each WDM subscriber unit 400 includes an ONT WDM optical transmitter / receiver 410, an ONT Ethernet L2 switch 420, a DS0 conversion processor 430, a voice processor 440, a dedicated circuit processor 450, and an ONT clock processor 460. ) And the ONT control unit 470.

The ONT WDM optical transmitter / receiver 410 extracts an Ethernet frame from an optical signal of a specific wavelength received by the passive optical branch combiner 300 and transmits the Ethernet frame to the ONT Ethernet L2 switch unit 420, and the ONT Ethernet L2 switch unit The Ethernet frame received from the 420 is converted into an optical signal of a specific wavelength and transmitted to the passive optical coupler 300. The ONT WDM optical transmitter / receiver 410 is paired with the WDM optical transmitter / receiver 150 in the WDM access device 100 in one-to-one correspondence.

The ONT Ethernet L2 switch unit 420 functions to switch and transmit the Ethernet frame received through the ONT WDM optical transmission / reception unit 410 to an Ethernet LAN port (RJ45 port) or the DS0 conversion processor 430 according to its characteristics, and Perform a dysfunction. That is, when the Ethernet frame received through the ONT WDM optical transmitter / receiver 410 is a voice or dedicated line Ethernet frame, the ONT Ethernet L2 switch unit 420 transmits it to the DS0 conversion processor 430 and receives the received Ethernet frame. In case of video service, data and video telephone frame, it is output to Ethernet LAN port (RJ45 port).

The ONT Ethernet L2 switch unit 420 may be connected to a home gateway in a subscriber's home or a set-top box (STB) provided by a subscriber by using a home network composed of a UTP cable transmitting 100Mbps. If you use the service, you can connect directly to the PC. In addition, when receiving the subscriber traffic upward, the ONT Ethernet L2 switch unit 420 classifies voice and leased line Ethernet frames, video frames, data frames, video telephone frames, and the like into classes and prioritizes the corresponding classes. It performs the function of processing ranking.

The DS0 conversion processor 430 classifies the frame transmitted from the ONT Ethernet L2 switch unit 420 into a voice or dedicated line Ethernet frame, extracts a DS0 signal from the classified frame, and extracts the DS0 signal from the classified frame. It transmits to the line processor 450 and its reverse function. That is, the DS0 conversion processor 430 transmits the DS0 PCM data to the voice processor 440 and transmits the dedicated line data to the dedicated line processor 450. At this time, since the transmitted Ethernet frames are classified and processed by specific MAC addresses, port numbers, and the like, each frame can be distinguished.

The voice processing unit 440 converts an analog voice signal into a digital voice signal by performing a SLIC (Subscriber Line Interface Circuit) codec process on the DS0 PCM data received from the DS0 conversion processor 430, and Perform a dysfunction. At this time, the analog voice signal may be directly connected to a general telephone using the RJ11 port.

The dedicated line processing unit 450 converts the dedicated line data received from the DS0 conversion processing unit 430 into an analog signal through analog interface processing, and performs the reverse function.

The ONT clock processor 460 generates a system clock using loop synchronization and internal synchronization using DS0 received through the DS0 conversion processor 430 and supplies the generated clock signal to each component in the WDM subscriber station 400. do.

The ONT control unit 470 initializes each component in the WDM access device 100, performs maintenance functions such as alarm / failure processing, performance monitoring, device control, and CIT through access ports on the front and rear of the device. It provides an operation function through a (Craft Interface Terminal) to control the operation of the WDM access device 100 as a whole.

The operation of the wavelength division multiplexing passive optical subscriber network system of the present invention having the above-described configuration will be briefly described as follows. In the following description, only a process transmitted downward is described, and a process transmitted upward operates in a reverse direction of the downward direction and thus description thereof will be omitted.

Ethernet L3 switch unit 110 is connected to the Ethernet / Kornet (MPLS) network and BcN through the Gigaport Ethernet and connected to the gigabit Ethernet when receiving a Gigabit Ethernet frame for high-speed Internet, HDTV video services It transmits to the L2 switch unit 140. In addition, the Ethernet L3 switch unit 110 is a TDM E1 processing unit 120 is connected to the DCS network and the E1 frame for the dedicated line service and V5.2 E1 processing unit 130 is connected to the PSTN and E1 frame for the general telephone service Receiving an Ethernet frame of 64kbps from each is converted to a gigabit Ethernet frame is switched to the Ethernet L2 switch 140.

The Ethernet L2 switch unit 140 switches the Giga-class Ethernet frame received from the Ethernet L3 switch unit 110 to the 100Mbps level to the WDM optical transmitter / receiver 150 corresponding to a specific wavelength allocated to the subscriber to receive the corresponding service. send. At this time, each of the Ethernet L2 switches 140 is connected to 32 WDM optical transmitters / receivers 150 that transmit optical signals having different wavelengths λ1, λ2, λ3, ..., λn.

The WDM optical transmitter / receiver 150 converts the 100 Mbps Ethernet frame received from the Ethernet L2 switch unit 140 into a specific optical wavelength and transmits it to the OLT passive optical combiner 160. Optical signals of different wavelengths output from the WDM optical transmitter / receivers 150 are multiplexed by the wavelength division multiplexer in the OLT passive optical combiner 160 and then output as a single optical fiber using the amplified light source of the broadband light source module 200. Sent to node RN.

The passive optical branch combiner 300 provided in the remote node RN branches the received WDM optical signal for each wavelength and transmits the received WDM optical signal to the corresponding WDM subscriber station 400.

The ONT WDM optical transmitter / receiver 410 extracts an Ethernet frame (100 Mbps) from an optical signal having a specific wavelength branched from the passive optical branch combiner 300 and transmits the Ethernet frame (100 Mbps) to the ONT Ethernet L2 switch unit 420. The ONT Ethernet L2 switch unit 420 classifies the Ethernet frames received from the ONT WDM optical transmission / reception unit 410 according to their characteristics, and outputs video service, data, and video telephone frames through the Ethernet LAN port, and performs voice or dedicated line. The Ethernet frame is transmitted to the DS0 conversion processor 430.                     

The DS0 conversion processor 430 classifies the frame received from the ONT Ethernet L2 switch unit 420 into a voice or dedicated line Ethernet frame, extracts a DS0 signal having a size of 63 kbps from the classified frame, and converts the DS0 PCM data into the voice processor 440. ) And the dedicated line data is transmitted to the dedicated line processor 450. At this time, the Ethernet frame received by the DS0 conversion processor 430 is divided into a specific MAC address, a port number, etc., and processed to distinguish each frame.

The voice processor 440 and the dedicated line processor 450 convert the received voice data and the dedicated line data into analog signals and output the analog signals.

4 is a diagram showing a front mounting state of the mounting apparatus on which the WDM access device 100 of the present invention is mounted.

The mounting apparatus 500 of the present invention mounts and operates the WDM access device 100, the broadband light source module 200, a fuse and an alarm panel, and an optical cable in a standard rack (width: 23 inches, height: 2200 mm).

The mounting apparatus 500 of FIG. 4 shown as an embodiment of the present invention has a size of 515 mm in width, 280 mm in depth, and 265 mm in height, and includes a control unit (MCU) for mounting the OLT control unit 180 in the WDM access device 100. 510, a TDM unit (TIU) 520 for mounting the TDM E1 processing unit 120, a V5.2 unit (VIU) 530 for mounting the V5.2 E1 processing unit 130, and an Ethernet L3 switch unit ( A switch unit (SWU) 540 for mounting 110, and an optical transmission unit (PIU) 550 for mounting an Ethernet L2 switch 140, a WDM optical transmitter / receiver 150, and an OLT passive optical coupler 160. It is configured to include.                     

The control unit (MCU) 510, the TDM unit (TIU) 520, and the V5.2 unit (VIU) 530 have an E1 connection port, and the switch unit (SWU) 540 has a plurality of Gigabit Ethernet ( GbE) port. In this case, the switch unit (SWU) 540 is composed of two units having two units, that is, a unit that is currently being operated and a unit that maintains a standby state so as to switch over when a failure occurs in consideration of the protection switching function.

A plurality of optical transmission unit (PIU) 550 is provided with three optical ports on the front, these are each composed of two ports for the up and down broadband light source module 200 and one WDM subscriber unit 400 transmission port.

The mounting apparatus 500 is designed to have a bus structure on the back play-in so that each of the mounted units 510 to 550 can communicate with other units via a bus, and can be expanded without self-modification. Or add a new unit to use.

As described above, the wavelength division multiplexing passive optical subscriber network system of the present invention enables the construction of high-quality and high-speed FTTH networks, thereby guaranteeing at least 100Mbps of transmission bands to each subscriber, thereby ensuring HDTV-class IP-TV, VoD / In addition to EoD video service, high-quality video phone service and high-speed Internet service, existing telephone service and dedicated line service can be integrated and provided.

Claims (13)

Integrates data of different characteristics received through a plurality of networks providing different services and converts them into Ethernet frames of a certain band, and converts the Ethernet bands of a certain band into an optical wavelength corresponding to a subscriber to transmit the corresponding service. A WDM access device that performs wavelength division multiplexing on the optical wavelengths and outputs the same through a single optical fiber, and vice versa; A broadband light source module for amplifying a light source and supplying it to the WDM access device for a long distance transmission of an optical signal output from the WDM access device; A passive optical branch combiner for branching the multiplexed optical signal output from the WDM access device for each wavelength and outputting the multiplexed optical signals having different wavelengths and transmitting the multiplexed optical signals to the WDM access device; And Extracts the Ethernet frame of the predetermined band from the optical signal of a specific wavelength received by branching from the passive optical branch combiner, classifies the extracted Ethernet frame according to the characteristics of the frame, processes the signal, and transmits it to the corresponding subscriber station And a WDM subscriber unit performing the reverse function. The apparatus of claim 1, wherein the WDM access device is A dedicated line E1 processor for converting a frame received through a dedicated line network (DCS network) for a dedicated line service into a DS0 level and converting the frame into an exclusive line Ethernet frame and outputting the reverse frame; A voice E1 processing unit for converting and outputting digital voice data received through a telephone network (PSTN) for general telephone service into a voice Ethernet frame and vice versa; Networks that transmit giga-class Ethernet frames and Ethernet frames received through the dedicated line E1 processing unit and the voice E1 processing unit are switched to the corresponding Ethernet L2 switch unit and outputted, and the Ethernet frames received from the Ethernet L2 switch unit are output to the characteristics. Ethernet L3 switch unit for switching and outputs to any one of the network for transmitting the giga-class Ethernet frame, the dedicated line E1 processing unit and the voice E1 processing unit; A plurality of Ethernet L2 switch units which perform a function of switching and outputting an Ethernet frame received from the Ethernet L3 switch unit to the Ethernet frame of a predetermined band and its reverse function; A plurality of WDMs for outputting the Ethernet frame of the predetermined band received from the Ethernet L2 switch unit as an optical signal having a specific wavelength assigned to a corresponding subscriber by using a light source supplied from the broadband light source module and vice versa Optical transmitter / receivers; One-to-one correspondence with the plurality of Ethernet L2 switch units, and multiplexing the optical signals output from the plurality of WDM optical transmitter / receivers corresponding to each Ethernet L2 switch unit and outputting the multiplexed optical signals to the passive optical coupler through the single optical fiber And a plurality of OLT passive optical branch combiners for performing the reverse function. An OLT clock processor for generating and outputting clock signals necessary for the operation of the WDM access device; And A wavelength division multiplexing passive optical subscriber network system including an OLT control unit for controlling overall operation of the WDM access device. The method of claim 2, wherein the Ethernet L3 switch unit In order to satisfy the quality criteria according to the characteristics of each traffic to be switched, the subscriber's traffic is classified into classes, and the wavelength division multiplexing passive optical subscription is characterized by performing priority processing and DiffServ DSCP (DiffServ Code Point) processing. Magnetic net system. The switch of claim 2, wherein the Ethernet L2 switch is And a Gigabit Ethernet frame connected to the Ethernet L3 switch unit and a Gigabit Ethernet to switch the Gigabit Ethernet frame received from the Ethernet L3 switch unit to a 100Mbps Ethernet frame. The method of claim 4, wherein the Ethernet L2 switch unit After checking the destination address of each Ethernet frame received from the Ethernet L3 switch unit, the output port is determined by referring to an address mapping table, and if it is possible to transmit to the corresponding output port, the switched frames are transmitted through the corresponding output port. Wavelength division multiplexing passive optical subscriber network system characterized in that the transmission to the optical / transmission and reception. The method of claim 2, The control unit, the dedicated E1 processing unit, the voice E1 processing unit, and the Ethernet L3 switch unit are provided as separate units, respectively, The Ethernet L2 switch, the plurality of WDM optical transmitter / receivers corresponding to each Ethernet L2 switch, and the OLT passive optical coupler corresponding to the plurality of WDM optical transmitter / receivers are provided as one optical transmission unit and are mounted. A wavelength division multiplexing passive optical subscriber network system characterized by the above-mentioned. The unit of claim 6, wherein the Ethernet L3 switch unit is mounted. For the protection switching function, a wavelength division multiplexing passive optical subscriber network system comprising a first switch unit that is currently in operation and a second switch unit which maintains a standby state to be switched in the event of a failure in the first switch unit. . The method of claim 6, wherein the optical transmission unit A plurality of wavelength division multiplexing passive optical subscriber network system, characterized in that the plurality is mounted, each optical transmission unit has an optical port connected to the wideband light source module and the WDM subscriber unit transmission port for the up and down. The method of claim 1, wherein the WDM subscriber unit An ONT WDM optical transmitter / receiver for extracting and outputting an Ethernet frame from an optical signal having a specific wavelength received by branching from the passive optical splitter and a reverse function; An ONT Ethernet L2 switch unit configured to switch Ethernet frames received through the ONT WDM optical transmitter / receiver according to their characteristics and transmit them to different paths, and the reverse function thereof; A DS0 conversion processor for classifying a frame received from the ONT Ethernet L2 switch unit into a voice Ethernet frame and a dedicated line Ethernet frame, extracting and outputting a DS0 signal from the classified frame, and a reverse function thereof; A voice processor for receiving a voice Ethernet frame from the DS0 conversion processor and outputting the received voice Ethernet frame as an analog voice signal; A dedicated line processing unit receiving a dedicated line Ethernet frame from the DS0 conversion processing unit, and performing analog interface processing on the received dedicated line Ethernet frame to output an analog signal; An ONT clock processor for generating and outputting clock signals necessary for the operation of the WDM subscriber station; And A wavelength division multiplexing passive optical subscriber network system including an ONT control unit for controlling overall operation of the WDM subscriber station. 10. The apparatus of claim 9, wherein the ONT WDM optical transmission / reception unit And a WDM optical transmission / receiving unit in one-to-one correspondence with the WDM access device. The method of claim 9, wherein the ONT Ethernet L2 switch unit When the Ethernet frame received through the ONT WDM optical transmitter / receiver is a voice or dedicated line Ethernet frame, the Ethernet frame is transmitted to the DS0 conversion processor. When the received Ethernet frame is a video service, data, and video telephone frame, the Ethernet LAN is transmitted. Wavelength division multiplexing passive optical subscriber network system characterized in that output to the port (RJ45 port). The method of claim 9, wherein the ONT Ethernet L2 switch unit When receiving subscriber traffic upward, the voice Ethernet frame, the leased line Ethernet frame, the video frame, the data frame, the video phone frame, etc. are classified into classes and perform the function of processing the priority of the corresponding class. Wavelength division multiplexing passive optical subscriber network system, characterized in that. 10. The apparatus of claim 9, wherein the voice processing unit A wavelength division multiplexing passive optical subscriber network system, characterized in that the received voice Ethernet frame SCR (Subscriber Line Interface Circuit) codec processing.

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