KR20100071468A - Splitter module and optical access network system with the said module - Google Patents

Abstract

PURPOSE: A splitter module and an optical access network system including the same are provided to implement a package type to be attached to and detached from an optical divergence box. CONSTITUTION: A coupler fixing holder(130) is built in a cover unit. The coupler fixing holder fixes a coupler which is formed on the splitter. A fan-out cord fixing holder(140) is embedded in the cover unit. The fan-out cord fixes the fan-out cord connected to the coupler through a core. An adapter assembly(120) comprises one or more adapters connected to an optical fiber connector formed on one end of the optical fiber passing through the fan-out cord.

Description

Splitter module and optical access network system having same {Splitter module and optical access network system with the said module}

The present invention relates to a splitter module and an optical subscriber network system having the same. More specifically, the present invention relates to a splitter module for an optical cable divergence box used to construct an FTTH optical subscriber network, and an optical subscriber network system using an optical cable branch enclosure including the splitter module for network construction. .

In order to provide high-speed leased lines or Internet services, it is common to construct optical access networks after laying optical cables inside subscriber's homes or office buildings. Such an optical subscriber network usually has a structure in which a ring network and a sensory network are mixed.

A circular network is formed in a Fiber Distribution Frame (FDF) of a particular central office (CO), drawing a circular route along the road, and forming a cluster of cores with the same number of cores up to the same telephone station's FDF. Say network. In summary, the annular network is a network that connects its own network in the telephone office, and in particular, it is called an optical trunk network because it is implemented as a circular root optical cable network. The optical fiber network usually has a number of intermediate connection points in the root, which serve as intermediate connection points (= optical cable junction box). The optical splice enclosure also serves to branch the optical cable. On the other hand, the haptic network is a type of network in which the number of cores decreases as the distance from the FDF of the specific telephone station decreases, and the network that extends from the intermediate access point to the FTTH subscriber.

Recently, contents using FTTH optical subscriber networks (also known as FTTH subscriber optical cable networks) such as high speed internet services, voice over internet protocol (VoIP), video calls, and interactive TV (ex. IPTV) have been steadily developed. Accordingly, the number of FTTH subscribers is increasing continuously. However, for the service provider, there is a burden of enormous investment costs depending on the subscriber's housing type. Therefore, in order to spread and spread the FTTH optical subscriber network nationwide, efforts to reduce the ongoing construction cost are urgently required.

The initial concept of FTTH was to supply optical cores 1: 1 from the CO to the subscriber's premises, but the deployment of FTTH did not spread for a long time due to the huge investment cost. However, as the performance of subscriber transmission equipment continues to improve, today, up to 32 subscribers can be shared simultaneously using a single optical core. Recently, the FTTH method which reduces the optical core by 1/32 in the optical subscriber network has been applied.

A 32-pin splitter (1: 2, 1: 4, 1: 8, 1:16, 1:32) for the PON (Passive Optical Network) is required for common use by 32 subscribers using one optical core. Done. In dense multi-unit dwellings, it is advantageous to accommodate subscribers using a 1:32 splitter, but not in general housing complexes where the distribution of subscribers is dispersed. Therefore, in the area where general houses are concentrated, the two-stage branching method that divides the splitter into several stages and forms a network is applied.

The two-stage branching method employs a primary RN (remote node) and a secondary RN. The primary RN is provided in the optical junction box, and the optical core connection of the input / output part of the splitter generally uses a fusion splicing method. On the other hand, the secondary RN is installed in the optical branch box installed in Jeonju or the internal terminal box in the building, and the splitter connection uses the fusion splicing method at the input side and the connector is connected at the output side for convenient connection. I'm using the method. The reason why the connector is connected to the output side is to facilitate the connection of the incoming optical cable used when the subscriber is opened, and to facilitate the connection work in the field. The connector connection method on the output side is also called a field assembly connector connection method.

However, because of the fact that the external environment is poor because of working on the poles of the ground and requires careful attention to deal with what is composed of optical elements, there was a lot of inconvenience in the construction of mounting the splitter in the optical branch enclosure. Moreover, the installation work takes a long time, and the possibility of failure is very high due to worker's carelessness or disconnection. Therefore, in the related art, a process of mounting the splitter in the optical branch enclosure prior to installing the optical branch enclosure in the pole is made in advance.

On the other hand, in the conventional method of directly mounting the splitter itself in the optical branch enclosure, the risk of failure due to intrusion of foreign matters when adding or transferring the splitter due to the change of subscribers was very high.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a splitter module implemented in a package form so as to be mounted / removable to an optical branch enclosure and an optical subscriber network system having the module.

The present invention has been made in order to achieve the above object, a cover portion for receiving a splitter therein; A coupler fixing part which is built in the cover part and fixes the coupler provided in the splitter; A fanout cord fixing part embedded in the cover part and fixing a fanout cord connected to the coupler through a core; And an adapter assembly having at least one adapter for connecting with an optical fiber connector formed at one end of the optical fiber passing through the fanout cord.

Preferably, the cover portion is formed with at least one inlet through which the insertion groove into which the adapter assembly is inserted and the optical cable connecting to the coupler are introduced.

Preferably, the coupler fixing part is implemented by a pair of walls whose upper end is bent inwardly on the inner bottom surface of the cover part.

Preferably, the fan-out cord fixing part is attached to the inner wall of the cover part, and is implemented in the form of a box having an upper portion open and grooves formed on both side walls.

Preferably, the splitter module is characterized in that the size (width × length × height) is 90 ~ 100mm × 55 ~ 65mm × 25 ~ 30mm.

Preferably, the cover portion is characterized in that to attach the Velcro tape or ring on the outer surface.

In addition, the present invention is a cover portion for accommodating a splitter therein, a coupler fixing portion for fixing a coupler built in the cover portion and provided in the splitter, and a fan embedded in the cover portion and connected to the coupler through a core. A splitter module including a fan-out cord fixing part for fixing a fan-out cord, and an adapter assembly having at least one adapter for connecting to an optical fiber connector formed at one end of the optical fiber passing through the fan-out cord. It provides an optical subscriber network system comprising an optical connection enclosure containing a.

Preferably, the splitter module is characterized in that the detachable to the optical connector.

According to the present invention, by implementing the splitter module in a package form to be mounted / removable to the optical branch enclosure, the following effects can be obtained. First, since the splitter itself does not need to be installed directly inside the optical branch enclosure, the work process can be simplified and the work time can be greatly reduced. In addition, even those who do not have professional skills can work easily, and less effort to mount the splitter inside the light splitter enclosure in advance.

Second, the simplification of the work process can improve the construction efficiency despite the poor external environment, and can significantly reduce the cost of building FTTH. In addition, it is possible to increase the concentration to eliminate the carelessness of the worker, and to contribute to the nationwide dissemination and spread of the FTTH optical subscriber network can be built quickly and safely.

Third, even if there is a change in subscribers, the removal and expansion work can be performed without affecting other lines.

Fourth, the size of the optical splitter enclosure can be reduced through the packaged splitter module, and the splitter module protects the coupler of the optical device to extend the life of the optical line.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are assigned to the same components as much as possible even if displayed on different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. In addition, the following will describe a preferred embodiment of the present invention, but the technical idea of the present invention is not limited thereto and may be variously modified and modified by those skilled in the art.

1 is a perspective view of a splitter module according to a preferred embodiment of the present invention. And, Figure 2 is an exploded perspective view of the splitter module according to a preferred embodiment of the present invention. 1 and 2, the splitter module 100 according to the preferred embodiment of the present invention includes a case 110, an adapter assembly 120, a coupler fixing holder 130, and a fanout cord fixing holder 140. ).

In general, to provide optical subscriber network service in subscriber's premises through CO (Central Office), the primary RN (Remote) installed inside the optical access box in the manhole at OLT (Optical Line Terminal) An optical cable line is constructed to pass through the splitter of the node. Subsequently, the optical cable line is extended to the splitter of the secondary RN installed in the optical branch box or the building terminal box of Jeonju. After that, the incoming optical cable is installed from the secondary RN's splitter to the subscriber's premises to complete the network construction, and the optical subscriber network service is opened. This process is called FTTH optical subscriber network construction process.

However, when installing the optical cable to the subscriber's premises to build the FTTH, it is necessary to accommodate a plurality of subscribers in one optical branch enclosure. The splitter functions in this case as an optical element that can accommodate multiple subscribers using a single optical core in the optical branch enclosure. The structure of the splitter is as shown in FIG.

Referring to FIG. 3, the splitter 300 includes a coupler 310 for branching the primary RN incoming optical cable (900 μm) on the input side into four ribbon optical fibers in the form of an optical fiber core, and four ribbons in consideration of ease of connection. And a fan-out cord 320 for connecting the optical fiber to four 900 μm optical fibers, and an adapter assembly 120 for connector connection with each 900 μm optical fiber. However, in order to install the splitter 300 having such a structure in the optical branch enclosure, care should be taken not to damage the small diameter optical fiber. In addition, the allowable radius of curvature of the optical fiber should also be taken into account, given that the optical fiber is housed.

The splitter module 100 according to the present invention is to package the splitter 300 itself in a box-shaped small module. In the related art, the splitter 300 is installed directly in the optical branch enclosure within the secondary RN, so that there is a high risk of failure and many inconveniences in construction. Therefore, in the present invention, the splitter 300 is integrated in a module form so that the splitter 300 can be installed or transferred to the optical branch enclosure simply and conveniently. In addition, the splitter module 100 should also consider the possibility of further expansion by reducing the size as possible.

The splitter module 100 is installed in an optical branch enclosure (also referred to as an optical cable branch enclosure) installed in a pole to build an FTTH optical subscriber network. The splitter module 100 is implemented to be mounted / removable in the optical branch enclosure. This structure of the splitter module 100 protects the optical coupler from the external environment, facilitates construction and ensures speed and stability. It also increases the efficiency of the FTTH optical subscriber network construction process by allowing it to be easily increased or decreased in the optical branch enclosure according to the change in the number of subscribers.

An actual implementation of the splitter module 100 is as shown in FIG. 4.

The case 110 is also referred to as a cover part and includes a main body 111 and a cover 112 to protect the case 110 from being inserted therein.

The body 111 forms an adapter assembly insertion groove 113 to allow insertion of the adapter assembly 120 on one side. In addition, the main body 111 forms the optical fiber inlet 114 on one side. The optical fiber inlet 114 is for inserting the splitter input optical fiber 150 therein, and a plurality of optical fiber inlets 114 may be implemented.

If both the input port and the output port are provided at one side of the splitter module 100, an efficient configuration between components in the optical branch enclosure is possible. The reason for this is that by forming the input port and the output port on one side, the splitter module 100 can be easily installed and the space use efficiency of the optical branch enclosure can be improved. This may further contribute to reducing the size of the optical branch enclosure. Therefore, in the embodiment of the present invention, in consideration of this point, it is preferable to form the adapter assembly insertion groove 113 and the optical fiber inlet 114 together on one side of the main body 111.

On the other hand, the main body 111 and the cover 112 is provided with a screw hole 115 penetrating from top to bottom as a means for mutual fixing, respectively. The main body 111 and the cover 112 are mutually fastened through the screw holes 115 provided, respectively.

The adapter assembly 120 is a connection means of an optical fiber connector formed at one end of the splitter 300 embedded in the splitter module 110. The adapter assembly 120 is formed by combining a plurality of splitter output adapters. Adapter assembly 120 is preferably implemented with SC type optical connector adapters. An example cross section of the adapter assembly 120 is as shown in FIG. 5A.

The coupler fixing holder 130 is a holder for fixing the optical coupler, and is formed to include at least one optical fiber protection slot in the bottom surface of the main body 111. A method of fixing the coupler, which is a part of the splitter, to the coupler fixing holder 130 is as shown in FIG. 6 (a) is a state before fixing the coupler 310 to the coupler fixing holder 130, Figure 6 (b) is a state after fixing the coupler 310 to the coupler fixing holder 130.

According to FIG. 6, the coupler fixing holder 130 includes a pair of optical fiber protection slots 600 having a top bent inward to prevent the coupler 310 from escaping upward. The coupler fixing holder 130 may prevent the coupler 310 from being separated by the vibration through the structure.

This will be described with reference to FIGS. 1 and 2 again.

The fanout cord fixing holder 140 is a basket-shaped holder for fixing the fanout cord 320 and is attached to one side of an inner wall of the main body 111. A method of fixing the fanout cord 320, which is a part of the splitter 300, to the fanout cord fixing holder 140 is illustrated in FIG. 7. FIG. 7A illustrates a state before fixing the fanout cord 320 to the fanout cord fixing holder 140, and FIG. 7B illustrates the fanout cord 320 as the fanout cord fixing holder 140. Referring to FIG. After fixing it to).

Referring to FIG. 7, the fanout cord 320 is inserted from the top to the fanout cord fixing holder 140. At this time, the fan-out cord fixing holder 140 preferably has grooves 700 formed on both side walls thereof such that 900 μm optical fibers and ribbon optical fibers on both sides thereof are not bent.

The splitter module 100 described above forms the following connection configuration through internal components. A description with reference to FIG. 5B is as follows. The splitter in the splitter module 100 has a coupler 310 and a fanout cord 320, one end of the optical fiber is drawn out of the coupler 310 and directed toward the optical fiber inlet 114, and the other end of the optical fiber is a fanout cord. It is withdrawn from 320 and connected to adapter assembly 120. The optical fiber directed toward the optical fiber inlet 114 connects to the incoming optical cable 500 installed from the primary RN, and the optical fiber connected to the adapter assembly 120 is connected to the incoming optical cable 510 connected to the subscriber premises through the adapter assembly 120. Connect.

However, considering that the splitter module 100 is mounted in the optical branch enclosure, the smaller the size, the more efficient it will be. However, when bending within an allowable radius of curvature, the optical signal may be broken due to bending loss. Therefore, the minimum allowable radius of curvature needs to be maintained. The splitter module 100 according to the present invention includes a coupler fixing holder 130 for fixing the coupler 310 and a fanout cord fixing holder 140 for fixing the fanout cord 320 therein. In addition, a space for mounting the adapter assembly 120 on one side should also be secured.

Therefore, in consideration of these points, the size (width × length × height) of the splitter module 100 according to the present invention is preferably 90 to 100 mm × 55 to 65 mm × 25 to 30 mm. The most preferred size of the splitter module 100 is 90mm × 55mm × 25mm. This is because the splitter module 100 of this size occupies a minimum volume in the optical branch enclosure while performing all functions. If the length, length, and height of the splitter module 100 are each 100 mm or more, 65 mm or more, or 30 mm or more, the volume occupied in the optical branch enclosure becomes excessively large. On the other hand, if the width, length and height of the splitter module 100 are 90 mm or less, 55 mm or less, and 25 mm or less, respectively, the splitter may not perform its function.

On the other hand, in the embodiment of the present invention, the allowable radius of curvature of the optical cable is preferably 36mm ~ 40mm. This is because the optical signal is cut off when the allowable radius of curvature is 36mm or less, and when the allowable radius of curvature is 40mm or more, the configuration of the splitter module 100 having the above-described size becomes difficult. Most preferably, the allowable radius of curvature of the optical cable is 36 mm.

On the other hand, when mounting the coupler 310 to the coupler fixing holder 130, it is preferable that the 900㎛ optical fiber and the ribbon optical fiber on both sides of the coupler 310 to secure a bending space of more than the allowable radius of curvature. Similarly, when the fanout cord 320 is mounted on the fanout cord fixing holder 140, it is preferable that the 900 µm optical fiber and the ribbon optical fiber on both sides of the fanout cord 320 also have a bending space of more than an allowable radius of curvature.

In view of the above, the inner space formed by the coupler fixing holder 130 is preferably penetrated from one side to the other, and the fan-out cord fixing holder 140 is also preferably formed with grooves on both side walls as described above.

On the other hand, the coupler fixing holder 130 may be implemented in a cylindrical shape through which the inside is pierced from one side to the other. At this time, the coupler fixing holder 130 is preferably a portion of the upper surface or side surface in the longitudinal direction so that the coupler 310 can be inserted.

It has already been described that the splitter module 100 is mounted / removable in the optical branch enclosure. In the embodiment of the present invention for this purpose, the splitter module 100 attaches the Velcro tape to the outer surface thereof. The splitter module 100 has a structure that can be easily detached from the optical branch enclosure and easily attached to the splitter by freely attaching and detaching the Velcro tape. If the splitter module 100 is mounted / removed to the optical branch enclosure through the Velcro tape, the Velcro tape is also formed inside the optical branch enclosure. On the other hand, the splitter module 100 may be implemented to be attached to / detachable to the optical branch enclosure by forming a ring on one side.

When the splitter 300 is actually mounted inside the splitter module 100 is shown in FIG. 8. Each part can be fully understood by the contents already described, and thus detailed description thereof will be omitted.

9 is an exemplary view when the splitter module 100 is installed and operated in an optical branch enclosure installed in a pole. Reference numeral 900 denotes an optical branch enclosure.

The above description is merely illustrative of the technical idea of the present invention, and various modifications, changes, and substitutions may be made by those skilled in the art without departing from the essential characteristics of the present invention. will be. Accordingly, the embodiments disclosed in the present invention and the accompanying drawings are not intended to limit the technical spirit of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by the embodiments and the accompanying drawings. . The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

The present invention discloses a splitter module implemented in a package form to be mounted / removable to an optical branch enclosure and an optical subscriber network system having the module. According to the present invention, the FTTH construction process can be simplified, and the process time can be greatly reduced. In addition, despite the poor external environment, the construction efficiency can be improved, and the cost of constructing the FTTH can be greatly reduced. In addition, it is possible to dismantle and expand without affecting other lines, and to reduce the size of the optical branch enclosure and to extend the life of the optical line.

The splitter module and the optical branch enclosure including the splitter module according to the present invention can be used when constructing an FTTH optical subscriber network. As the present invention creates the effect of building FTTH quickly and safely, it is expected to contribute to the nationwide dissemination and spread of the FTTH optical subscriber network.

1 is a perspective view of a splitter module according to a preferred embodiment of the present invention,

2 is an exploded perspective view of a splitter module according to a preferred embodiment of the present invention;

3 is a side view showing the structure of the splitter,

4 is a photograph of an actual implemented splitter module,

5 is a cross-sectional view of the adapter assembly and a plan view of a splitter module according to a preferred embodiment of the present invention;

6 is a view showing a state before and after mounting the coupler of the splitter to the coupler fixing holder of the splitter module,

7 is a view showing a state before and after mounting the fanout cord of the splitter to the fanout cord fixing holder of the splitter module,

8 is a photograph taken when the splitter is mounted in the splitter module according to an embodiment of the present invention.

9 is a photograph taken when the splitter module is installed and operated in the optical splitter box.

<Description of Symbols for Main Parts of Drawings>

100: splitter module 110: case

111: body 112: cover

113: adapter assembly insertion groove 114: optical fiber inlet

115: screw hole 120: adapter assembly

130: coupler fixing holder 140: fan-out code fixing holder

300: splitter 310: coupler

320: Fanout Code

Claims (8)

A cover part accommodating the splitter therein; A coupler fixing part which is built in the cover part and fixes the coupler provided in the splitter; A fanout cord fixing part embedded in the cover part and fixing a fanout cord connected to the coupler through a core; And An adapter assembly having at least one adapter for connecting with an optical fiber connector formed at one end of the optical fiber passing through the fanout cord Splitter module comprising a. The method of claim 1, The cover unit is a splitter module, characterized in that the insertion groove into which the adapter assembly is inserted and at least one inlet through which the optical cable connecting to the coupler is introduced. The method of claim 1, The coupler fixing part is a splitter module, characterized in that the upper surface is bent in the inner bottom surface of the cover portion is a pair of bent in an inward direction. The method of claim 1, The fan-out cord fixing part is attached to the inner wall of the cover part, the splitter module, characterized in that implemented in the form of a box, the top is open and grooves formed on both side walls. The method of claim 1, The splitter module is a splitter module, characterized in that the size (width × length × height) is 90 ~ 100mm × 55 ~ 65mm × 25 ~ 30mm. The method of claim 1, The cover unit is a splitter module, characterized in that for attaching the Velcro tape or ring on the outer surface. A cover part accommodating a splitter therein, a coupler fixing part embedded in the cover part and fixing a coupler provided in the splitter, and a fan-out cord embedded in the cover part and connected to the coupler through a core. an optical connection including a splitter module including a fan-out cord fixing portion for fixing an out cord, and an adapter assembly having at least one adapter for connecting to an optical fiber connector formed at one end of the optical fiber passing through the fan-out cord. Enclosure Optical subscriber network system comprising a. The method of claim 7, wherein And the splitter module is detachably attached to the optical connection enclosure.

Images