KR20080055379A - Integrated type optical fiber transmission service system of wibro and fiber-to-the-zone - Google Patents

Abstract

A WiBro/FTTZ(Fiber-To-The-Zone)-integrated optical communication network service system is provided to maximize the utilization of optical fibers and economically offer high-quality wire/wireless communication services by integrating WiBro and FTTZ. A WiBro/FTTZ-integrated optical communication network service system comprises an access control part(110), an optical add-drop part(130), and forward deployment facilities(150). The access control part multiplexes WiBro and FTTZ data, received through the Internet, converts the multiplexed data into optical signals, and outputs them through a single optical fiber. The optical add-drop part receives optical signals from the access control part, classifies the received optical signals according to forward deployment facilities, and transmits the classified signals to the forward deployment facilities. Also the optical add-drop part receives optical signals from each forward deployment facility and transmits them to the access control part. Each forward deployment facility receives optical signals from the optical add-drop part, demultiplexes them into WiBro data and FTTZ data, and transmits them to each associated subscriber's wire/wireless terminal.

Description

INTEGRATED TYPE OPTICAL FIBER TRANSMISSION SERVICE SYSTEM OF WIBRO AND FIBER-TO-THE-ZONE}

1 is a network diagram showing a conventional WiBro transmission network structure;

2 is a network diagram showing a conventional FTTZ transmission network structure;

3 is a network schematic diagram illustrating a schematic structure of a transmission network using multiplexing / demultiplexing in an electrical domain of an integrated optical communication network service system of WiBro and FTTZ according to the present invention;

4 is a network schematic diagram showing a transmission network schematic structure using multiplexing / demultiplexing in a wide area of an integrated optical communication network service system of WiBro and FTTZ according to the present invention;

5 is a detailed network diagram illustrating a transmission network structure using multiplexing / demultiplexing in an electrical domain of an integrated optical communication network service system of WiBro and FTTZ according to the present invention;

6 is a detailed network diagram illustrating a transmission network structure using multiplexing / demultiplexing in a wide area of an integrated optical communication network service system of WiBro and FTTZ according to the present invention.

 * Explanation of Signs of Major Parts of Drawings *

20: optical fiber 31: UTP cable

33: TP Cable 110, 210: access control unit

111: access control router 113: FTTZ access switch

115: multiplexer 117: optical transceiver

130, 230: optical branch coupling unit 131: aggregation switch

150, 250: Forward placement facility 151: Optical terminal

153: Multiplexer 155: RAS

157: subscriber switch 159: optical repeater

171: PSS 173: subscriber terminal device

211: WDM optical transceiver 231: WiBro converging distributor

233: FTTZ concentrator

The present invention relates to a service system of WiBro and FTTZ based on optical communication, and more specifically, to maximize the use efficiency of optical fiber by integrating WiBro service and FTTZ service and to provide high-quality wired / wireless communication service economically. It relates to an integrated optical network service system of WiBro and FTTZ.

Currently, the global wireless Internet market is exploding, and Korea is also providing high-speed wireless data services such as WLAN, CDMA 2000, 1x EV-DO, and WCDMA. Among them, the sales of wireless Internet using mobile phones are also steadily increasing. In the case of wireless LAN, although the speed is relatively fast, mobility is not guaranteed and the use radius is narrow, which has limited the activation of diffusion. Accordingly, there is a need for a high-speed, relatively inexpensive wireless Internet service.

For this reason, a service called WiBro (Wireless Broadband) has been proposed. WiBro uses the 2.3GHz frequency band and is an Internet service with a speed of 1Mbps.

The transmission network configuration for providing WiBro services is shown in FIG. 1. Looking at this in detail as an example, the data transmitted from the access control router (ACR) located in the NSC (Network Service Center) connected to the carrier network is connected to the RAS (Radio Access Station) via an aggregation switch located at a branch / branch. It is transmitted to the corresponding portable subscriber station (PPS). In addition, the ACR, the aggregation switch, and the RAS are connected by optical fibers to maximize the efficiency and reliability of data transmission. In addition, the optical repeater (optical repeater) is connected to the RAS and the optical fiber serves to extend the service range of the RAS. As mentioned above, the provision of WiBro services requires forward deployment facilities such as routers, switches, and RAS. In the case of RAS, service provision does not occur when rental, maintenance, maintenance, and maintenance of a place for installation are continuously performed. Do not.

 In addition, due to the rapid development of optical communication technology, the optical subscriber network applying this to the subscriber network is rapidly developing. In particular, FTTH (Fiber To The Home) is spotlighted as the next-generation subscriber network infrastructure because optical fiber is installed in the section from the telephone company to the subscriber's premises to provide stable high-speed data service to subscribers. However, in order to provide the FTTH service, there is a prerequisite that the optical fiber must be installed to the subscriber's premises. Therefore, the burden on the installation, maintenance, and maintenance cost thereof is considerable, and there are many difficulties in expanding the service. Therefore, various alternatives have emerged to solve these shortcomings. Among them, FTTZ (Fiber-To) provides services through the UTP cable or the telephone line after the subscriber switch by connecting the optical fiber and installing the subscriber switch near the subscriber. Interest in The-Zone is growing.

Thus, FIG. 2 illustrates a conventional transmission network configuration for providing the FTTZ service. As a detailed example of the downlink data, the data transmitted from the FTTZ access switch located in the NSC (Network Service Center) is converted to photo-electric conversion at the subscriber switch or the xDSL switch via the aggregation switch located at the branch / branch, and then UTP cable or telephone line. It is transmitted to subscriber terminal device through wire. As such, the FTTZ access switch, aggregation switch, and subscriber switch / xDSL switch are connected by optical fiber to maximize the reliability and efficiency of data transmission. The subscriber switch / xDSL switch and subscriber terminal device have a UTP cable that is easy to install, maintain, and maintain. It is connected by wire such as telephone line and provides high speed internet service at a lower price. Also, even in this case, it is necessary to continuously rent, maintain, maintain and manage the site for installing the subscriber switch / xDSL switch so that service provision does not occur.

As such, WiBro and FTTZ have a very similar transport network structure and coverage, as described above and shown in FIGS. 1 and 2. Nevertheless, the transmission network operates independently, reducing the overall efficiency of using optical fibers, and leasing the installation sites for each transmission network for the advanced deployment facilities such as RAS and subscriber switch, and operating as an independent organization for its maintenance, maintenance, and management. All the burden is imposed on the user.

The technical problem to be achieved by the present invention is to provide an integrated service providing method of the WiBro transmission network and FTTZ transmission network to maximize the use efficiency of the optical fiber by integrating the WiBro service and FTTZ service, and economically provide high quality wired / wireless communication service. have.

The present invention is characterized in that the WiBro and FTTZ data received through the Internet network are multiplexed, converted into an optical signal, and then outputted to a single optical fiber, and an access control unit performing the reverse function, and the optical signal received from the access control unit. Is classified by each forward deployment facility and transmitted, and the optical signal received from the forward deployment facility is received from the optical branch coupling unit and the optical branch coupling unit to be transmitted back to the access control unit, and the WiBro and FTTZ data It is to provide an integrated optical communication network service system of WiBro and FTTZ, each of which includes a function of demultiplexing and transmitting to wired / wireless terminals of corresponding subscribers and a forward deployment facility performing the reverse function.

And, the access control unit is connected to the Internet network access control router to transmit and receive WiBro service data, FTTZ access switch is connected to the Internet network to transmit and receive the FTTZ service data, the access control router and the FTTZ access switch received from Multiplexer for combining / separating / wireless service data in the electrical domain, and an optical transmitter / receiver to perform a pre-optical conversion of the wired / wireless service data combined in the multiplexer to transmit a single optical fiber and its reverse function. It is configured to include.

In addition, the multiplexer may be combined / separated at any one selected from layers 1 to 4 of the OSI 7 layer when combining / separating wired / wireless service data in the electric domain.

In addition, the optical branch coupling unit is characterized in that any one selected from L2 switch or L3 switch or a combination of both.

In addition, the forward arrangement facility is connected to the optical transmitter and the optical transceiver, the optical signal received from the single optical fiber to the optical-electric conversion to the electrical signal and the reverse function, the wired / wireless service data is electrically Multiplexer to combine / separate in the area, Subscriber switch to transmit wired service data among wired / wireless service data separated from the multiplexer to the corresponding subscriber station or perform reverse function, Wired separated from the multiplexer It is configured to include a RAS (Radio Access Station) to transmit the wireless service data of the / Wireless service data to the corresponding Portable Subscriber Station (PSS) or perform the reverse function.

The forward placement system may further include an optical repeater configured to extend a data service area to a shaded area after receiving an optical signal from the optical branch coupling unit.

In addition, the subscriber line, which is a connection between the output port of the subscriber switch of the forward deployment facility and the subscriber terminal device, is connected to any one selected from a single mode fiber, a multimode fiber, a UTP cable, a TP cable, or a telephone line.

In addition, it is preferable that the output port of the subscriber switch of the forward deployment facility has a pluggable interface that can be selectively connected according to the speed of data and the type of the subscriber line.

In still another aspect of the present invention, an access control unit performs a function of allowing WiBro and FTTZ data received through an Internet network to be multiplexed to different transmission wavelengths and outputted as a single optical fiber, and a reverse function thereof, and an optical signal received from the access control unit. After the signal is demultiplexed and separated into WiBro and FTTZ data, the separated data is classified and transmitted according to the wired / wireless data type and each forwarding arrangement, and the optical signal received from the forwarding arrangement is reversely transmitted to the access control unit. Integrated optical fiber of the WiBro and FTTZ including an optical branch coupling unit for transmitting the optical signal from the optical branch coupling unit and a forwarding arrangement that performs the reverse function when the optical signal is received from the optical branch coupling unit. The present invention provides a network service system.

The access control unit may include an access control router connected to the Internet network to transmit and receive WiBro service data, an FTTZ access switch connected to the Internet network to transmit and receive FTTZ service data, and received from the access control router and the FTTZ access switch. It includes a WDM optical transmitter and receiver which performs a function of multiplexing wired / wireless communication service data in a wide area to be transmitted to a single optical fiber and its reverse function.

The optical branch coupling unit may demultiplex an optical signal received from the access control unit into an optical area so that the optical signal is separated into wired / wireless service data, and the WDM optical transceiver and the WDM optical transmitter are separated from each other. Wireless service data can be classified by each forward deployment facility, wired service divider that performs reverse function, and wired service data separated from WDM optical transmitter / receiver are classified by each forward deployment facility, and FTTZ that reverse function is performed. And a WDM optical transmitter / receiver configured to correspond to each forwarding facility that performs the function of transmitting the data classified in the converging distributor and the WiBro converging device and the FTTZ concentrator and the reverse function thereof.

In addition, the forward deployment facility, the WDM optical transmitter and the WDM optical receiver, which receives the optical signal which is already separated from the optical branch coupling unit into the wired / wireless service data of the corresponding forward deployment facility or performs its reverse function. Subscriber switch which transmits wired service data among wired / wireless service data to the corresponding subscriber terminal device or transmits wireless service data among wired / wireless service data received by the WDM optical transceiver to the corresponding PSS or performs the reverse function. It is configured to include RAS that performs dysfunction.

In addition, the forward deployment facility, it is further preferable that the optical repeater further comprises an optical repeater to extend the data service area to the shadow area after receiving the optical signal from the optical branch coupling unit.

The subscriber line, which is a connection between the output port of the subscriber switch of the forward deployment facility and the subscriber terminal device, is connected to any one selected from a single mode fiber, a multimode fiber, a UTP cable, a TP cable, or a telephone line.

In addition, it is preferable that the output port of the subscriber switch of the forward deployment facility has a pluggable interface that can be selectively connected according to the speed of data and the type of the subscriber line.

(Example)

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

FIG. 3 is a schematic diagram illustrating a structure of a transmission network using multiplexing / demultiplexing in an electrical domain of an integrated optical communication network service system of WiBro and FTTZ according to the present invention. FIG. 4 is a diagram illustrating a WiBro and FTTZ according to the present invention. 5 is a schematic block diagram illustrating a transmission network schematic structure using multiplexing / demultiplexing in the optical domain of an integrated optical network service system of FIG. 5. FIG. 5 is a multiplexing / electrical scheme of an integrated optical network service system of WiBro and FTTZ according to the present invention. Detailed network diagram showing transmission network structure using demultiplexing, FIG. 6 is a detailed network diagram showing transmission network structure using multiplexing / demultiplexing in the optical domain of an integrated optical communication network service system of WiBro and FTTZ according to the present invention. to be.

First, referring to FIGS. 3 and 5 showing the structure of a transmission network using multiplexing / demultiplexing in the electrical domain, the configuration of an integrated optical communication network service system of WiBro and FTTZ according to the present invention, the access control unit 110 is the Internet first An access control router (ACR) 111 for accessing a network and transmitting and receiving WiBro service data and an FTTZ access switch 113 for accessing an Internet network and transmitting and receiving FTTZ service data are configured together. do.

In addition, the wired / wireless service data received from the access control router 111 and the FTTZ access switch 113 may be combined / separated in the electrical region and the wired / wired combined in the multiplexer 115. It consists of an optical transceiver 117 to perform the pre-optical conversion of the wireless service data to transmit a single optical fiber 20 and its reverse function.

The access control router 111 plays a role of transmitting and receiving wireless traffic for a WiBro, and the FTTZ access switch 113 plays a role of transmitting and receiving wired traffic for an FTTZ.

In addition, the multiplexer 115 combines or separates wired / wireless traffic in an electrical region to a MUX / DEMUX device, which may be made in any of layers 1 to 4 in the OSI 7 layer structure.

If the data is a combination of wired / wireless traffic, the optical transmission is performed after the pre-optical conversion using the optical transceiver 117. Of course, its reverse function is also possible.

The optical signal received by the access control unit 110 allows the aggregation switch 131 of the optical branch coupling unit 130 to be classified / transmitted for each forward placement facility 150, and the light received at the forward placement facility 150. The signal is reversely transmitted to the access control unit 110.

The optical branch coupling unit 130, which is located between the access control unit 110 and the forward layout facility 150, distributes data traffic to each forward layout facility, is also connected to the optical fiber 20, and an aggregation switch. As 131, an L2 switch or an L3 switch is used, or an L2 / L3 switch is used together.

The forward arrangement 150 receiving the optical signal from the optical branch coupling unit 130, the optical signal received by the single optical fiber 20, the optical-to-electric conversion of the optical signal and its reverse function is performed The transceiver 117 is configured.

In addition, a multiplexer 115 for coupling / separating wired / wireless service data in an electrical domain is connected to the optical transmitter 117.

In addition, the subscriber switch 157 configured to transmit the wired service data among the wired / wireless service data separated by the multiplexer 115 to the corresponding subscriber station 173 or perform a reverse function thereof.

In addition, a radio access station (RAS) 155 for transmitting wireless service data among wired / wireless service data simultaneously separated by the multiplexer 115 to a corresponding portable subscriber station (PSS) 171 or performing a reverse function thereof. It is configured to include).

In addition, the forward arrangement 150 further includes an optical repeater 159 for extending the data service area to the shadow area after the optical signal is received from the optical branch coupling unit 130. More preferred. This is used to expand the service area of the WiBro, but by applying this to the forward deployment facility 150 of the present invention can be expected to be used in addition to the service area of the FTTZ as well as the WiBro.

The configuration of an integrated optical communication network service system of WiBro and FTTZ according to the present invention will be described in more detail with reference to FIGS. 4 and 6 showing a structure of a transmission network using multiplexing / demultiplexing in a wide area.

First, the access control unit 210 is connected to the Internet network to access and transmit WiBro service data, and in such a role as an Access Control Router (ACR) 111 connected to the Internet network to transmit and receive FTTZ service data. The FTTZ access switch 113 is configured together.

Further, the data received from the access control router 111 and the FTTZ access switch 113 multiplexes the wired / wireless communication service data in a wide area using different wavelengths and transmits the data to a single optical fiber and its reverse function. It is configured to include a WDM optical transmitter 211 is performed.

After demultiplexing the optical signal received by the access control unit 210 and separating the WiBro and FTTZ data, the separated data is classified and transmitted according to the wired / wireless data type and each forward placement facility 250, and the forward arrangement is performed. An optical branch coupling unit 210 is configured such that the optical signal received at the facility 250 is transmitted to the access control unit 210 in reverse.

The WDM optical transceiver 211 of the optical branch coupling unit 230 has a function of demultiplexing the optical signal received from the access control unit 210 in the optical domain and separated into wired / wireless service data, respectively, and its reverse function. Is performed.

In addition, the WiBro concentrator 231 performs a function of classifying the wireless service data separated by the WDM optical transceiver 211 by each forward deployment facility 250 and its reverse function.

In addition, the FTTZ concentrator divider 233 performs a function of classifying the wired service data separated by the WDM optical transmitter / receiver 211 for each forward arrangement 250 and its reverse function.

Then, the data to be transmitted from the WiBro concentrator distributor 231 and the FTTZ concentrator distributor 233 are transmitted to each forward placement facility 250 and correspond to each forward layout facility 250 in which the reverse function is performed. It comprises a WDM optical transmitter 211.

When the optical signal is received from the optical branch coupling unit 230, the forward arrangement 250 is configured to be transmitted to the wired / wireless terminal of the corresponding subscriber and the reverse function.

The WDM optical transmitter / receiver 211 of the forward arrangement 250 allows the optical signal separated by the wired / wireless service data of the forward arrangement 250 to be received from the optical branch coupling unit 230 or performs the reverse function. do.

In addition, the subscriber switch 157 transmits the wired service data among the wired / wireless service data received by the WDM optical transceiver 211 to the corresponding subscriber station 173 or performs the reverse function.

The RAS 155 transmits the wireless service data among the wired / wireless service data received by the WDM optical transceiver 211 to the corresponding PSS or performs the reverse function.

In addition, the forward arrangement 250 also includes an optical repeater (159) for extending the data service area to the shadowed area after receiving the optical signal from the optical branch coupling unit 230, the optical repeater (159) More preferred. This is because, as described in the description of the present invention using multiplexing / demultiplexing in the electric domain, it is possible to expect an effect that can be used together with the expansion of the service area of the FTTZ as well as the WiBro.

In addition, the subscriber line, which is the connection between the output port of the subscriber switch 157 of the advanced placement facility 150 and the subscriber station 173, is selected from single mode fiber, multimode fiber, UTP cable, TP cable or telephone line. Connected. The subscriber line is determined according to the transmission distance or data type, and when the transmission distance is 100M or higher or 1Gb / s or higher speed transmission is required, single mode fiber (SMF) or multi mode fiber (MMF) fiber), and if the transmission distance is less than 100M, UTP cable is generally used. If the subscriber line is composed of a telephone line, the data is transmitted through the telephone line using an xDSL transmitter.

In addition, the output port of the subscriber switch 157 of the forward arrangement 150 has a pluggable interface that can be selectively connected according to the type of the subscriber line.

As described above, according to the present invention, by utilizing the similar system of the WiBro service and the FTTZ service more actively, it is possible to expect a direct cost reduction effect related to the lease, maintenance, management, and repair of the place for the advance placement facility. In addition, there is an advantage that can maximize the use efficiency of the optical fiber, and provide any number of additional effects by economically providing high quality wired / wireless communication service.

Although the present invention has been described with reference to the above embodiments, it is merely illustrative, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. . Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

Claims (15)

An access control unit configured to multiplex the WiBro and FTTZ data received through the Internet network, convert the optical signal into an optical signal, and output the single optical fiber; An optical branch coupling unit configured to transmit the optical signal received by the access control unit to be classified and transmitted for each forward deployment facility, and to transmit the optical signal received at the forward deployment facility to the access control unit in reverse; And An advance deployment facility for receiving an optical signal from the optical branch coupling unit, demultiplexing into WiBro and FTTZ data, and transmitting the optical signal to a wired / wireless terminal of a corresponding subscriber; Wibro and FTTZ integrated optical network service system including a. The method of claim 1, wherein the access control unit An access control router connected to the Internet network to transmit and receive WiBro service data; An FTTZ access switch connected to an Internet network to transmit and receive FTTZ service data; A multiplexer for combining / separating wired / wireless service data received from the access control router and the FTTZ access switch in an electrical area; And An optical transmitter / receiver for transmitting the wired / wireless service data combined in the multiplexer to pre-optical conversion and transmitting a single optical fiber and its reverse function; Wibro and FTTZ integrated optical network service system including a. The method of claim 2, wherein the multiplexer An integrated optical communication network service system of WiBro and FTTZ, characterized in that when combining / separating wired / wireless service data in the electrical domain, combining / separating at any one layer selected from layers 1 to 4 of the OSI 7 layer. The method according to claim 1, The optical branch coupling unit, Integrated optical communication network service system of WiBro and FTTZ, characterized in that any one or a combination of the L2 switch or L3 switch. The method of claim 1, wherein the forward deployment facility, An optical transmitter / receiver for optically converting an optical signal received from the single optical fiber into an electrical signal and vice versa; A multiplexer connected to the optical transmitter and configured to couple / separate wired / wireless service data in an electrical domain; A subscriber switch configured to transmit wired service data among wired / wireless service data separated by the multiplexer to a corresponding subscriber station or perform reverse function thereof; A radio access station (RAS) for transmitting wireless service data among wired / wireless service data separated by the multiplexer to a corresponding portable subscriber station (PSS) or performing a reverse function thereof; Wibro and FTTZ integrated optical network service system including a. The method according to claim 5, wherein the forward deployment facility, And an optical repeater for extending a data service area to a shadowed area after receiving an optical signal from the optical branch coupling unit. The method of claim 5, wherein A subscriber line, which is a connection between an output port of a subscriber switch and a subscriber station, is connected to any one selected from a single mode fiber, a multi mode fiber, a UTP cable, a TP cable, or a telephone line. The method of claim 7, wherein the advance batch facility WiBro and FTTZ integrated optical network service system, characterized in that the output port of the subscriber switch has a pluggable interface that can be selectively connected according to the speed of the data and the type of the subscriber line. An access control unit performing a function of multiplexing the WiBro and FTTZ data received through the Internet network to different transmission wavelengths and outputting the single optical fiber; The optical signal received by the access control unit is demultiplexed and separated into WiBro and FTTZ data, and the separated data is classified and transmitted according to the wired / wireless data types and each forward deployment facility, and the optical signal received from the forward deployment facility. Inversely, the optical branch coupling unit for transmitting to the access control unit; And When the optical signal is received from the optical branch coupling unit, the forward deployment facility that performs the function and the reverse function to be transmitted to the wired / wireless terminal of the corresponding subscriber; Wibro and FTTZ integrated optical network service system including a. The method of claim 9, wherein the access control unit, An access control router connected to the Internet network to transmit and receive WiBro service data; An FTTZ access switch connected to an Internet network to transmit and receive FTTZ service data; And A WDM optical transmitter and receiver for multiplexing wired / wireless communication service data in an optical area and transmitting the data received from the access control router and the FTTZ access switch using a different wavelength, and a reverse function thereof; Wibro and FTTZ integrated optical network service system including a. The method according to claim 9, The optical branch coupling unit, A WDM optical transmitter and receiver for demultiplexing the optical signal received by the access control unit in the optical domain so as to be separated into wired / wireless service data and a reverse function thereof; The wireless service data separated by the WDM optical transmitter and receiver is classified into each forward deployment facility and a WiBro converging distributor in which the reverse function is performed; The FTTZ concentrator divider that separates the wired service data from the WDM optical transmitter and receiver and performs the reverse function; And A WDM optical transmitter / receiver configured to correspond to each forwarding facility having a function of transmitting the classified data from the WiBro distributor and the FTTZ distribution distributor to each forward layout facility and the reverse function thereof; Wibro and FTTZ integrated optical network service system including a. The method of claim 9, wherein the forward deployment facility, A WDM optical transmitter or receiver for receiving an optical signal separated from the optical branch coupling unit by wire / wireless service data of a corresponding forward deployment facility or performing a reverse function thereof; A subscriber switch for transmitting wired service data among wired / wireless service data received by the WDM optical transceiver to a corresponding subscriber station or performing a reverse function thereof; RAS for transmitting wireless service data among wired / wireless service data received by the WDM optical transceiver to a corresponding PSS or performing a reverse function thereof; Wibro and FTTZ integrated optical network service system including a. The method according to claim 12, wherein the forward deployment facility, And an optical repeater for extending a data service area to a shadowed area after receiving an optical signal from the optical branch coupling unit. The method of claim 9, wherein A subscriber line, which is a connection between an output port of a subscriber switch and a subscriber station, is connected to any one selected from a single mode fiber, a multi mode fiber, a UTP cable, a TP cable, or a telephone line. 15. The integrated optical communication network of WiBro and FTTZ according to claim 14, wherein the output port of the subscriber switch of the forward deployment facility has a pluggable interface that can be selectively connected according to the speed of data and the type of subscriber line. Service system.

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