JP2004317737A - Mt connector, guide members used in the same and optical fiber management method using the same connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make the individual identification of a relevant MT (MECHANICALLY TRANSFERABLE) connector to be performed easily from among a lot of MT connectors used in a multiple optical fiber cable and moreover to make it possible to increase the amount of identification information drastically. <P>SOLUTION: An MT connector 5 is constituted of a pair of connector main bodies 9 having a joint face 13 for joining optical fibers 5 , a plurality of guide holes 15 which are provided in order to centering axes centers of a plurality of the optical fibers 5 of the joint face 13 to the connector main body 9 of one side of this one pair of connector main bodies 9, guide members 11 which are attached to guiding holes 15 of the connector main body 9 of other side, a clamp member 19 which clamps the one pair of connector main bodies 9 in a state in which they are abutted with each other at the joint face 13, and an RFID (Radio Frequency Identification) 29 which is incorporated in the guide member 11 and in which identification information is stored. Then, identification information of the relevant MT connector 5 is read out easily from the RFID 29 and the amount of processable identification information is increased by the RFID 29. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
According to the present invention, an MT connector for a multi-core optical fiber for connecting a tape core having a large number of optical fibers is laid, and an individual MT connector can be easily identified from the MT connector. TECHNICAL FIELD The present invention relates to an MT connector, a clamp member used in the MT connector, and an optical fiber management method using the MT connector.
[0002]
[Prior art]
Referring to FIG. 4, conventionally, when a multi-core optical cable 101 sheathed with a large number of optical fibers is laid, an optical wiring as an optical fiber concentrator in which a large number of optical fibers of the multi-core optical cable 101 are located in a station. It is connected by an optical connector or the like on a board (MDF: Main Distribution Frame, hereinafter abbreviated as “MDF”) or the like. Since the length of the multi-core optical cable 101 is limited, another multi-core optical cable 101 is connected and extended. In FIG. 4, the first to fourth multi-core optical cables 101A to 101D are connected.
[0003]
In the near future, it is predicted that an optical access network represented by FTTH (Fiber-to-the-Home) will evolve and that optical fibers will spread to each subscriber. The distance from the station to each home is only a few kilometers at most, but in general, the number of subscribers of stations in large metropolitan areas in Japan reaches tens of thousands, so the stations are terminated by MDF. It is predicted that the number of optical fibers of the third party will reach tens of thousands. If this is terminated with a single-fiber (single-fiber) optical connector, it will be of the order of tens of thousands. Therefore, for example, an MT connector 105 (Mechanically Transferable Connector) is used as a multi-core optical connector for connecting multi-core optical fibers such as the multi-core optical fiber ribbon 103, thereby greatly reducing the number of optical connectors. Can be reduced.
[0004]
On the other hand, a multi-core optical cable 101 having several hundreds to a thousand or more optical fibers has also been put into practical use, and the number of optical cables drawn into a station can be reduced. In these multi-core optical cables 101, usually, a large number of 4-core or 8-core optical fiber tape cores 103 are accommodated. One or both ends of the multi-core optical cable 101 have a 4-core or 8-core multi-core optical connector. Is installed at the factory and shipped.
[0005]
For example, a 1000-core optical cable has 125 8-core optical fiber ribbons 103, and 125 8-core MT connectors 105 are attached to one end thereof. Usually, when the multi-core optical cable 101 is drawn into the manhole 107A from the tip (retracting end) thereof and passed through a pipeline (in the case of Japan, usually, the inside diameter φ75 mm) to the next manhole 107B, a spring is used. A metal fitting called an eye is attached to the tip. In each of the manholes 107A to 107D, each optical fiber of the multi-core optical fiber ribbon 103 is connected in each of the closures 109A to 109D.
[0006]
However, when the tip of the multi-core optical cable 101 becomes large, it is not possible to pass through the inside of the pipeline, and it is necessary to adjust the distance between the manholes 107A to 107D and the length of the multi-core optical cable 101 on site. Usually, the MT connector 105 is attached to only the terminal end of the multi-core optical cable 101 before shipment. For example, in FIG. 4, the second multi-core optical cable 101B is routed between the first manhole 107A and the second manhole 107B. In the first closure 109A of the first manhole 107A, a multiplicity of multi-core optical fiber ribbons 103 are connected by the MT connector 105, and in the second closure 109B of the second manhole 107B, a multiplicity of multicores. The optical fiber ribbon 103 is fusion-spliced.
[0007]
On the other hand, the third multi-core optical cable 101C is routed from the third manhole 107C to the second manhole 107B, that is, in the direction opposite to the second multi-core optical cable 101B. In this manner, the connection by the MT connector 105 and the fusion connection are alternately repeated in the manholes 107A to 107D for each connection.
[0008]
In a metropolitan area, construction that causes traffic congestion is allowed only for a short time at night, but the MT connector 105 is attached to the multi-core optical cable 101 at the factory and shipped, so that the multi-core optical cable is It is possible to connect the optical fibers 101 in a short time.
[0009]
The above description relates to a case where the multi-core optical cable 101 is newly laid. If a situation different from the initial demand forecast after a certain period elapses after the laying, the multi-core optical cable 101 is laid out. In some cases, it is necessary to change the wiring of the fiber ribbon 103. In such a case, the closures 109A and 109C connected by the MT connector 105 are opened, the MT connector 105 is detached, and the wiring is changed to meet the new demand. At this time, since a large number of MT connectors 105 exist in the closures 109A and 109C, it is necessary to individually identify the MT connectors 105 in order to avoid erroneous attachment / detachment and erroneous connection.
[0010]
5 and 6, as the MT connector 105, in the JIS (standard number JIS C5981), a ferrule 111 for a 2-core, 4-core, 8-core, 10-core, and 12-core optical fiber tape is used. It has been standardized. The MT connector 105 is exposed on the joint surface 115 of each ferrule 111 by positioning and abutting two ferrules 111 previously attached to the multi-core optical fiber ribbon 103 with two precision guide pins 113. The plurality of optical fibers 117 are connected to each other.
[0011]
The ferrule 111 of the MT connector 105 exposes the plurality of optical fibers 117 of the multi-core optical fiber ribbon 103 at predetermined positions on the joint surface and connects them. For example, a filler (typically silica) of 60 to 80 Wt% is used. It is a small resin molded product that is transfer-molded from an epoxy resin containing a fine powder), a polyphenylene sulfide resin (hereinafter abbreviated as PPS), or the like. The ferrule 111 of the MT connector 105 contains a filler as a component thereof, thereby increasing the Young's modulus from that of a resin alone to reduce distortion during transfer molding, and has excellent polishing properties of the joint surface. Elastic deformation can be suppressed.
[0012]
A boot 119 is attached to the ferrule 111. The boot 119 is made of synthetic rubber, and is located at a portion where the multi-core optical fiber ribbon 103 is inserted into the ferrule 111 on the side opposite to the joint surface 115. The boot 119 is provided to avoid stress concentration when the multi-core optical fiber ribbon 103 is bent near the base of the ferrule 111.
[0013]
The two guide pins 113 are made of stainless steel, and are inserted into the guide holes 121 provided in the ferrule 111 to be connected to the ferrule 111 of the pair of (two) MT connectors 105 facing each other. This is for aligning the axis of the tape core 103.
[0014]
As described above, the ferrule 111 of the pair (one set) of the MT connector 105 in which the axes of the multi-core optical fiber ribbon 103 are aligned by the guide pins 113 is, as shown in FIG. Since a constant pressing force is applied in the axial direction of the optical fiber 117 by the steel clamp spring 123, a stable fitted state is maintained.
[0015]
In FIG. 6, the marking surface 125 of the ferrule 111 of the MT connector 105 has two mating combinations due to the structure of the MT connector 105. The connection direction is uniquely determined by coloring only one of the side surfaces of 0.0 mm.
[0016]
Further, one or more surfaces of the ferrule 111 are removed except for a surface on which the pair of ferrules 111 face each other and a surface on which the boot 119 is inserted (a surface on which the multi-core optical fiber ribbon 103 is inserted). The identification information such as characters, numbers, or bar codes is directly printed on the information display surface 127, or a label on which the identification information is printed is attached, so that the MT connector 105 can be individually identified (for example, Patent Documents 1 and 2).
[0017]
[Patent Document 1]
JP-A-9-197194
[Patent Document 2]
JP 2002-116345 A
[Problems to be solved by the invention]
By the way, in the conventional MT connector 105, as shown in FIG. 6, identification information is directly printed on the information display surface 127 of the small-sized ferrule 111 in characters, numerals, bar codes, or the like for individual identification. Or a label printed with letters, numbers, barcodes, or the like is affixed, so that after a long period of time, the above-described printing becomes unclear or the label is peeled off. In addition, in the conventional method, since the area of the information display surface 127 of the ferrule 111 is small, the number of prints is limited and the amount of identification information is also limited, so that it is impossible to describe all necessary information. There was a problem that.
[0020]
In addition, the user cannot confirm the MT connector 105 housed in the closures 109A and 109C or the MDF without exposing the MT connector 105. Further, there is a problem that it takes a lot of time to find a target MT connector 105 from a large number of MT connectors 105, so that the construction cost increases.
[0021]
Also, if the wrong MT connector 105 is disconnected, a device controlled by a signal flowing through the optical fiber of the MT connector 105 may malfunction or stop information, resulting in a serious accident. There was a problem of being connected.
[0022]
The present invention has been made to solve the above-described problem, and an object of the present invention is to individually identify each MT connector from among a number of MT connectors for connecting each optical fiber in a laid multicore optical cable. An object of the present invention is to provide an MT connector, a clamp member used in the MT connector, and an optical fiber management method using the MT connector, which can be easily performed and the amount of identification information can be significantly increased.
[0023]
[Means for Solving the Problems]
In order to achieve the above object, an MT connector according to the present invention according to claim 1 has an MT connector having a joint surface for connecting optical fibers, and a pair of connector bodies having a joint surface for joining optical fibers. A plurality of guide holes provided for aligning the optical fiber of the joining surface with the one connector body of the pair of connector bodies, and the guide holes are mounted on the other connector body of the pair of connector bodies. And a clamp member that clamps the pair of connector bodies in a state where the pair of connector bodies abut against each other at a joint surface, and an RFID that is provided on the clamp member and stores identification information. is there.
[0024]
Therefore, at the time of line switching or the like, the identification information of the corresponding MT connector can be easily read from the RFID provided on the clamp member. It also contributes to reduction. Further, the amount of identification information that can be handled by the RFID increases.
[0025]
An MT connector according to a second aspect of the present invention is the MT connector according to the first aspect, wherein the RFID can read and write the identification information from outside without contact.
[0026]
Accordingly, the identification information of the MT connector can be easily written in the RFID, and the written identification information of the MT connector does not disappear with the passage of time. Easily identified.
[0027]
According to a third aspect of the present invention, there is provided a clamp member for clamping a pair of MT connectors for aligning an optical fiber with each other in an abutting state, wherein the clamp member is provided with an RFID for storing identification information. It is characterized by having.
[0028]
Therefore, by clamping the pair of MT connectors with the clamp member in a state where the MT connectors are brought into contact with each other, the identification information of the corresponding MT connector can be easily read from the RFID at the time of line switching or the like. And incorrect connection is avoided, which also contributes to a reduction in line switching construction costs. Further, the amount of identification information that can be handled by the RFID increases.
[0029]
According to a fourth aspect of the present invention, there is provided the clamp member according to the third aspect, wherein the RFID can read and write the identification information from outside without contact.
[0030]
Accordingly, the identification information of the MT connector can be easily written in the RFID, and the written identification information of the MT connector does not disappear with the passage of time. Easily identified.
[0031]
According to a fifth aspect of the present invention, there is provided an optical fiber management method comprising: laying an optical cable sheathed with a plurality of optical fibers made of a plurality of strands or tapes and connecting a plurality of optical fibers of the optical cable by a plurality of pairs of MT connectors. And an optical fiber management method for managing the lines of the plurality of optical fibers configured by clamping with a clamp member for each pair of MT connectors,
An RFID storing identification information for identifying the corresponding MT connector is provided in advance for each of the clamp members, and the identification information of the RFID of each of the MT connectors is individually identified by a reader using the reading device. Thus, the line state of each optical fiber is managed.
[0032]
Therefore, when the optical cable is connected, information such as the core of the optical fiber, the line, and the construction is included in the RFID provided for each clamp member of each pair of MT connectors. At the time of line switching or the like, the identification information of the optical fiber is read from the RFID of the MT connector provided on each clamp member, so that the necessary optical fiber can be connected without touching the optical fiber carrying the line. Since the comparison and identification of the cords can be easily performed, significant labor saving can be achieved.
[0033]
An optical fiber management method according to a sixth aspect of the present invention is the optical fiber management method according to the fifth aspect, wherein the RFID can read and write the identification information from outside without contact.
[0034]
Therefore, the identification information of the optical fiber can be easily written into the RFID, and the written identification information of the optical fiber does not disappear with the passage of time. Easily identified.
[0035]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0036]
Referring to FIGS. 1 and 3, a multi-core optical cable 1 according to this embodiment is a cable in which a plurality of multi-core optical fiber tape core wires 3 are sheathed, for example. When the multi-core optical cable 1 is laid in the ground or on a utility pole, the length of the multi-core optical cable 1 is limited, so that another multi-core optical cable 1 is connected and extended. At this time, the multi-core optical cable 1 is extended by connecting each optical fiber 5 of each multi-core optical fiber ribbon 3 of the multi-core optical cable 1 by a pair of MT connectors 7.
[0037]
As shown in FIG. 1, a pair of MT connectors 7 according to this embodiment is an example for a four-core optical fiber ribbon, but in JIS (standard number JIS C5981), two MT connectors are used. Ferrules for 4-core, 8-core, 10-core, and 12-core optical fiber ribbons are standardized. The MT connector 7 includes, for example, two precision guide pins 11 as guide members provided on each of the ferrules 9 on the right side in FIG. 1 as a pair of connector bodies previously attached to the multi-core optical fiber ribbon 3. 1, a plurality of optical fibers 5 exposed at the joint surface 13 of each ferrule 9 are connected to each other by being mounted on a guide hole 15 provided in each ferrule 9 on the left side in FIG. is there.
[0038]
The ferrule 9 of the pair of MT connectors 7 exposes the plurality of optical fibers 5 of the multi-core optical fiber ribbon 3 at predetermined positions on the joint surface 13 and connects them. For example, a filler (60 to 80 Wt%) is used. It is a small resin molded product that is transfer-molded from epoxy resin, PPS resin, etc. containing silica fine powder). The ferrule 9 of each MT connector 7 contains a filler as a component thereof, thereby increasing the Young's modulus compared to a resin alone to reduce distortion during transfer molding, and is excellent in abrasion of the joint surface 13. In use, elastic deformation can be suppressed.
[0039]
A boot 17 is attached to each ferrule 9. The boot 17 is made of synthetic rubber, and is located at a portion where the multi-core optical fiber ribbon 3 is inserted on the opposite side of the joint surface 13 of each ferrule 9. are doing. The boots 17 are provided to avoid stress concentration when the multi-core optical fiber ribbon 3 is bent near the base of each ferrule 9.
[0040]
The guide pin 11 is made of, for example, a metal such as stainless steel, and is inserted into a guide hole 15 provided in the ferrule 9 on the left side in FIG. It is a positioning guide member for aligning each optical fiber 5 of the connected multi-core optical fiber ribbon 3.
[0041]
The ferrule 9 of the pair of two MT connectors 7 has a multi-core optical fiber 5 whose axial alignment is performed by a pair of guide pins 11, and as shown in FIG. A stable pressing state is maintained by applying a constant pressing force in the axial direction of the optical fiber 5 by the clamp spring 19 made of stainless steel.
[0042]
Clamp springs 19 constituting a main part of the embodiment of the present invention oppose each other on both ends in a longitudinal direction (a direction connecting obliquely upper right and obliquely lower left in FIG. 1) of flat plate portion 21. The hook portion 23 rises upward in FIG. 1 and is integrated. The hook portion 23 has a spring property (elasticity) so as to clamp the rear end surfaces of the pair of ferrules 9 butted against each other. The hooks 23 at both ends in the longitudinal direction are provided with cutouts 25 into which the boots 17 can be fitted. Therefore, in this embodiment, the clamp spring 19 is provided with a total of four hook portions 23.
[0043]
In addition, a total of four curved portions 27 which are curved outward in the longitudinal direction of the clamp spring 19 are integrated on the upper portion of each hook portion 23. An RFID 29 (Radio Frequency Identification) is provided inside one of the four bending portions 27.
[0044]
Referring to FIG. 2, the above-described RFID 29 will be described in detail. In this embodiment, the RFID 29 has a tuning capacitor, a power supply capacitor, and an MT connector 7 which constitute the RFID 29 in a plastic tubular case 31. An IC package 33 containing an IC (Integrated Circuit) chip storing identification information, and an antenna coil 35 electrically connected to the IC package 33 are built in. The antenna coil 35 plays a role of a minute antenna, and is formed by a straight rod-shaped or plate-shaped magnetic core member 37 and spirally wound around the magnetic core member 37 around the axis of the magnetic core member 37. And a covered copper wire 39 as a coil body.
[0045]
Since the ferrule 9 of the MT connector 7 is a thermosetting resin and the RFID 29 is exposed at both ends in the width direction of one curved portion 27 of the clamp spring 19, as shown in FIG. Signals can be transmitted between the RFID 29 of the clamp spring 19 that clamps 7 and an RFID reader 41 (lead device or read / writer device) as a reader using electromagnetic induction.
[0046]
The RFID 29 stores management information of the MT connector 7 stored in an IC chip in the IC package 33 via an antenna coil 35 by a radio wave transmitted from an antenna 45 connected to the RFID reader 41 by a cable 43, The identification information such as the optical fiber information of the multi-core optical fiber ribbon 3 connected to the optical fiber and information at the time of connection work can be read and written. That is, electromagnetic waves are exchanged between the antenna 45 of the RFID reader 41 and the antenna coil 35 of the RFID 29, and the MT connector 7 clamped by the clamp spring 19 provided with the RFID 29 can be individually identified.
[0047]
The identification information of the MT connector 7 including the multi-core optical fiber ribbon 3, the line, the construction, and the like connected as described above is previously stored in the RFID 29 by, for example, a read / write device.
[0048]
As described above, the multi-core optical cable 1 is extended and laid by connecting the multi-core optical fiber ribbons 3 of the multi-core optical cable 1 by the pair of MT connectors 7. In addition, an RFID 29 storing identification information of the MT connector 7 is provided on the clamp spring 19 for the pair of connected MT connectors 7.
[0049]
FIG. 3 shows a state of an identification test of the MT connector 7 of the multi-core optical cable 1 at a site. When rewiring the multi-core optical fiber ribbon 3 of the laid multi-core optical cable 1, the closure (not shown) connected with the MT connector 7 is opened, and the MT connector 7 existing in the closure is opened. In order to identify the target MT connector 7, an electromagnetic wave of 294 kHz is radiated to the surroundings as an interrogation signal from an antenna 45 connected to the RFID reader 41 by a cable 43. The above-mentioned electromagnetic wave is usually at or below 295 kHz, but is not limited to this.
[0050]
On the other hand, since the clamp connector 19 provided with the RFID 29 is used for the MT connector 7 to be identified, the RFID 29 uses a 294 kHz electromagnetic wave as an interrogation signal transmitted from the antenna 45 as an energy source and a power supply capacitor. Then, an electromagnetic wave as a response signal including the identification information of the MT connector 7 and the like stored in the IC chip is returned to the antenna 45.
[0051]
As described above, when the line is switched, the identification information of the RFID 29 is read by the RFID reader 41 (read device or read / writer device) by the exchange of the electromagnetic wave between the antenna 45 of the RFID reader 41 and the RFID 29. Since the MT connector 7 to which the RFID 29 is attached is easily identified, the erroneous attachment / detachment and erroneous connection of the MT connector 7 can be reliably avoided, and the line switching work cost can be reduced.
[0052]
Further, since the amount of identification information that can be handled is increased by using the clamp spring 19 provided with the RFID 29, the management information of the MT connector 7 and the multi-core optical fiber ribbon 3 connected to the MT connector 7 are controlled. By inputting a remarkable amount of identification information such as the information of the optical fiber and the information at the time of connection work to the RFID 29, it is also possible to control and identify the respective optical fibers 5 of the corresponding multi-core optical fiber tape core 3. Therefore, the optical cable manufacturing process management and the optical cable management become easy.
[0053]
The present invention is not limited to the above-described embodiment, but can be embodied in other modes by making appropriate changes. Although an example in which stainless steel is used as the material of the clamp spring 19 has been described, a material integrally formed of a thermosetting resin may be used.
[0054]
【The invention's effect】
As can be understood from the above description of the embodiment of the invention, according to the invention of claim 1, when the line is switched, the identification information of the corresponding MT connector can be easily obtained from the RFID provided on the clamp member. Since the data can be read out in a timely manner, erroneous connection / removal of the MT connector and erroneous connection can be reliably avoided, thereby contributing to a reduction in line switching work costs. Further, the amount of identification information that can be handled by the RFID can be increased.
[0055]
According to the second aspect of the present invention, the identification information of the MT connector can be easily written in the RFID, and the written identification information of the MT connector does not disappear over time. Can be easily identified in a short time without contact.
[0056]
According to the third aspect of the present invention, by clamping the two MT connectors in a state where they abut each other, the identification information of the corresponding MT connector can be easily read from the RFID at the time of line switching or the like. As a result, erroneous attachment / detachment and erroneous connection of the MT connector can be reliably avoided, which also contributes to reduction of line switching work costs. Further, the amount of identification information that can be handled by the RFID can be increased.
[0057]
According to the fourth aspect of the present invention, the identification information of the MT connector can be easily written in the RFID, and the written identification information of the MT connector does not disappear over time. Can be easily identified in a short time without contact.
[0058]
According to the invention of claim 5, when the optical cable is connected, information such as the core of the optical fiber, the line, and the construction can be included in the RFID provided for each clamp member of each pair of MT connectors. At the time of line switching, etc., the identification information of the optical fiber can be read from the RFID of each MT connector, and the required optical fiber can be easily compared and identified without touching the optical fiber carrying the line. Since it can be performed, it is possible to greatly reduce labor.
[0059]
According to the sixth aspect of the present invention, the identification information of the MT connector can be easily written into the RFID, and the written identification information of the MT connector does not disappear with the passage of time. Can be easily identified in a short time without contact.
[Brief description of the drawings]
FIG. 1 is a schematic perspective view of an MT connector according to an embodiment of the present invention.
FIG. 2 is a perspective view of an RFID used in the embodiment of the present invention.
FIG. 3 is a schematic diagram illustrating an MT connector management method according to the embodiment of the present invention;
FIG. 4 is a schematic explanatory diagram of a conventional MT connector management method.
FIG. 5 is a schematic perspective view of a conventional MT connector.
FIG. 6 is a schematic perspective view of a conventional MT connector.
[Explanation of symbols]
1 multi-core optical cable 3 multi-core optical fiber tape 5 optical fiber 7 MT connector (multi-core optical connector)
9 Ferrule (connector body)
11 Guide pin (guide member)
13 joining surface 15 guide hole 19 clamp spring (clamp member)
21 Plate part 23 Hook part 27 Curved part 29 RFID
31 case 33 IC package 35 antenna coil 41 RFID reader (lead device or read / writer device)
45 antenna

Claims (6)

A pair of connector bodies having a joining surface for joining an optical fiber, and a plurality of guide holes provided for axially aligning the optical fiber of the joining surface to one connector body of the pair of connector bodies; A guide member mounted on the guide hole in the other connector body of the pair of connector bodies, a clamp member for clamping the pair of connector bodies in a state where the connector bodies abut against each other at a joint surface, and identification information provided on the clamp member; And an RFID for storing the MT connector. The MT connector according to claim 1, wherein the RFID is capable of reading and writing the identification information from outside without contact. What is claimed is: 1. A clamp member for clamping a pair of MT connectors for aligning an optical fiber with each other in an abutted state, wherein said clamp member is provided with an RFID for storing identification information. The clamp member according to claim 3, wherein the RFID is capable of reading and writing the identification information from outside without contact. An optical cable sheathed with an optical fiber core comprising a plurality of strands or a tape core is laid, and a plurality of optical fibers of the optical cable are connected by a plurality of pairs of MT connectors, and a clamp member is provided for each pair of MT connectors. An optical fiber management method for managing the lines of the plurality of optical fibers configured by clamping,
An RFID storing identification information for identifying the corresponding MT connector is provided in advance for each of the clamp members, and the identification information of the RFID of each of the MT connectors is individually identified by a reader using the reading device. An optical fiber management method for managing the line state of each optical fiber by using the method. 6. The optical fiber management method according to claim 5, wherein the RFID is capable of reading and writing the identification information from outside without contact.

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