JP3649910B2 - Optical fiber cable terminator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an optical fiber cable terminator in an advanced optical communication network, which relates to a terminator that mounts optical fibers with high density and orderly and can improve the operability of connection switching of the optical fiber.
[0002]
[Prior art]
A conventional fiber optic cable termination device (FTM: Fiber Termination Module) will be described below. In general, the FTM is installed at a connection point between a subscriber optical fiber cable and an in-house optical fiber cable in an equipment center station. As a conventional example, there is one described in IEICE Technical Report CS95-50, OCS95-16, P.59-66, “Study on High-Speed / High-Capacity Technology of Optical Line Test System”.
[0003]
FIG. 9 shows the configuration of the in-house facility including the conventional FTM. 100 is an FTM, 2 is an optical coupler, 3 is an optical fiber selector (FS), 4 is a test branch optical fiber from the optical coupler 2, 5 is an optical multiplexer / demultiplexer, 6 is an optical filter on the transmission device side, 7 is a communication optical subscriber line terminal device, 8 is a video optical subscriber line terminal device, 9 is an optical subscriber line terminal station housing rack, 10 is a star coupler rack, and 11 is a test equipment rack (TEM: Test Equipment Module), 12 is a test device, 13 is an optical fiber selection device control and test device selection device (FTES), 14 is an FS master side optical fiber, 15 is a first site optical fiber cable, and 16 is a second site optical fiber. Cable, 17 is a subscriber optical fiber cable, 18 is a subscriber side optical filter, 19 is a communication optical subscriber line terminator, and 20 is a video optical subscriber line terminator.
[0004]
A mode of providing communication and video service via an optical fiber will be described with reference to FIG. In order to provide this service with high reliability, an FTM 100, an optical subscriber line terminal unit accommodating rack 9, a star coupler rack 10, and a TEM 11 are installed in the equipment center.
[0005]
1.3 .mu.m band communication light output from the communication optical subscriber line terminal equipment 7 that provides communication and 1.55 .mu.m band communication output from the video optical subscriber line terminal equipment 8 that provides video services. The light is incident on the star coupler rack 10 via the first in-house optical fiber cable 15. In the optical coupler / demultiplexer 5 of the star coupler rack 10, the communication light in the 1.3 μm band and the 1.55 μm band is wavelength-multiplexed, and the wavelength-multiplexed communication light is further equally distributed to a plurality of output ports. Communication light output from each port of the optical multiplexer / demultiplexer 5 enters the FTM 100 via the second intra-site optical fiber cable 16. The communication light incident on the FTM 100 passes through the optical coupler 2 that multiplexes and demultiplexes the test light, and passes through the subscriber optical fiber cable 17 to the communication optical subscriber line termination device 19 and the video optical subscriber line termination. Wavelength demultiplexed to the device 20 and provided as a communication and video service.
[0006]
A method for testing an optical fiber from the installation center when installing and maintaining an optical fiber cable will be described below. The test branch optical fiber 4 from the optical coupler 2 and the FS master side optical fiber 14 connected to the test apparatus 12 in the TEM 11 are selectively optically coupled by the FS 3 in the FTM 100. Further, the optical pulse tester in the test apparatus 12 is selected by the FTES 13 in the TEM 11. As described above, the test light from the optical pulse tester is incident on the subscriber optical fiber cable 17, and the loss distribution measurement and the fault location search are quickly performed.
[0007]
Here, when performing the test, in order to prevent the test light from entering the communication optical subscriber line terminating device 19 and the video optical subscriber line terminating device 20, the subscriber who blocks the test light and transmits the communication light The side optical filter 18 is installed immediately before the communication optical subscriber line terminating device 19 and the video optical subscriber line terminating device 20 for the test light. Further, in order to prevent the test light and the reflected light of the 1.55 μm band communication light output from the video optical subscriber line terminal station device 8 from entering the communication optical subscriber line terminal device 7, A transmission device side optical filter 6 that blocks communication light in the 1.55 μm band and transmits communication light in the 1.3 μm band is installed at the input port of the communication light in the 1.3 μm band of the optical multiplexer / demultiplexer 5.
[0008]
FIG. 10 is a diagram showing a configuration of a conventional FTM100 including the optical coupler 2 and the FS3. Parts corresponding to those in FIG. 9 are given the same reference numerals. In FIG. 10, 21 is a surplus length sorting member, and 22 is a surplus length processing shelf. On the left side of the FTM 100, a plurality of optical couplers 2 are accommodated in parallel at each stage, and a test branch optical fiber 4 branched from each optical coupler 2 is connected to an FS 3 disposed at the lowermost part. In addition, on the right side, a surplus length accommodation space is provided in which a surplus length sorting member 21 and a surplus length processing shelf 22 for accommodating a surplus connection length of the second intra-site optical fiber cable 16 are mainly disposed.
[0009]
FIG. 11 is a diagram showing a configuration of a connection part in a conventional FTM, and parts corresponding to those in FIGS. 9 and 10 are denoted by the same reference numerals. In FIG. 11, 23 is an optical connector adapter, 24 is an optical connector, and 25 is a single-core tape core connection part. The optical coupler 2 is preinstalled with a single-core tape core connection portion 25 and an optical connector 24.
[0010]
At the start of service, the subscriber optical fiber cable 17 and the FS master side optical fiber 14 are connected to the optical coupler 2. Next, the optical connector 24 connected to the optical fiber cable 16 on the second site is connected to the optical connector adapter 23 connected to the optical coupler 2, and the service starts. In this case, the length of the wiring path through which the second in-site optical fiber cable 16 leads from the extra length distributing member 21 to the optical coupler 2 is not uniform. Accordingly, in the second in-site optical fiber cable 16, an extra length is inevitably generated in the optical fiber portion connected to the optical coupler 2, and this extra length processing is a problem when the density of the housing core in the FTM is increased. become.
[0011]
In the conventional FTM, the surplus length sorting member 21 and the surplus length processing shelf 22 are designed to accommodate the surplus length of the second in-site optical fiber cable 16 in front of the FTM. When the optical fiber switching connection between the subscriber optical fiber cable and the in-house optical fiber cable is made due to construction work or failure recovery work, the entanglement between the optical fiber to be switched and the other optical fiber is released, and there is no accidental disconnection. It took a long time to work.
[0012]
[Problems to be solved by the invention]
In view of the above problems, an object of the present invention is to provide an optical fiber cable terminator capable of realizing high-density mounting of a subscriber optical fiber cable and an in-house optical fiber cable and making switching connection work more efficient. There is to do.
[0013]
[Means for Solving the Problems]
In order to achieve the above object, an optical fiber cable terminator according to the present invention provides an optical fiber group of a subscriber optical fiber cable that is a first optical fiber group and an intra-station optical fiber cable that is a second optical fiber group. An optical fiber group through a test access unit including an optical coupler to which an optical fiber test apparatus is connected and accommodating the first optical fiber group, and a holding plate unit accommodating the second optical fiber group. In a fiber optic cable terminator connected in a switchable manner,
The optical fiber cable terminator has a plurality of insertion / extraction optical fibers for connecting the optical coupler of the test access unit and the holding board unit, and one of the optical couplers is provided between the test access unit and the holding board unit. A connection board holding a plurality of optical connector adapters respectively connected to the input / output ports on the side, an alignment board having a plurality of through holes holding the insertion / extraction optical fiber movably, and holding the insertion / extraction optical fiber A holding plate,
Connecting the first optical fiber group to an input / output port on the other side of the optical coupler;
Optical connectors are respectively connected to one ends of the insertion / extraction optical fibers, and these optical connectors are detachably attached to the optical connector adapters of the connection board, respectively, and the other ends of the insertion / extraction optical fibers are connected to the through holes and the alignment boards. Housed in the holding plate unit through the holding plate,
Optical fiber storage portions for storing the pre-length portions of the insertion / extraction optical fibers are respectively provided on both sides of the alignment board, and the pre-length portions of the insertion / extraction optical fibers necessary for switching the insertion / extraction optical fibers are stored in the optical fiber storage portions. It is characterized by that.
[0014]
According to such an optical fiber cable terminator of the present invention, the connection portion includes an alignment board, a holding board, a connection board, and an insertion / extraction optical fiber, and further includes an optical fiber storage portion before and after the alignment board. The extra length of the insertion / extraction optical fiber can be distributed and stored in the space before and after the alignment board, and the workability of the switching operation can be remarkably improved.
[0015]
It is desirable that the insertion / extraction optical fiber of the optical fiber cable termination device of the present invention is an optical fiber containing an antistatic agent in its coating. The insertion / extraction optical fiber may be a carbon coated optical fiber. Moreover, you may use both together. Such an apparatus of the present invention can prevent entanglement of the insertion / extraction optical fiber due to static electricity.
[0016]
In the optical fiber cable termination device of the present invention, it is desirable that the insertion / extraction optical fiber includes an insertion / extraction optical fiber stopper for being held by the holding hole of the alignment board. By such an apparatus of the present invention, it is possible to prevent an erroneous operation of the insertion / extraction optical fiber during the switching operation and to prevent damage. Further, it is desirable that the insertion / extraction optical fiber stopper is provided with an identification symbol. Such an apparatus of the present invention significantly improves the workability of the confirmation work when performing the switching work.
[0017]
In the optical fiber cable terminator of the present invention, it is desirable that the alignment board has an insertion slit for inserting the insertion / extraction optical fiber into the holding hole and / or a common slit for connecting to the plurality of holding holes. By such an apparatus of the present invention, when the insertion / removal optical fiber is additionally inserted into or removed from the holding hole, it is not necessary to pass the connector of the insertion / removal optical fiber through the holding hole, so that an optical fiber cable can be added or removed. Work becomes easier. Furthermore, the capacity of the insertion / extraction optical fiber per area of the alignment board can be increased. The diameter of the holding hole of the alignment board may be a diameter that can hold a plurality of insertion / extraction optical fibers. With such an apparatus of the present invention, the accommodation density of the insertion / extraction optical fiber can be further increased.
[0018]
In the optical fiber cable terminator according to the present invention, the termination portion accommodates a plurality of first optical fibers and is connected to the end portion of the first optical fiber for each of the first optical fibers. A holding plate unit that includes a connector, connects the first optical fiber to an end of the optical fiber on the other surface of the holding plate, and stores a plurality of second optical fibers; It is desirable to include a test access unit that accommodates the unit, accommodates the optical fiber selector, and connects the second optical fiber from the optical fiber selector to one side of the connection board. By such an apparatus of the present invention, it is possible to increase the connection length of the optical component and the optical fiber, and it is possible to improve economy and workability. In addition, this makes it possible to increase the density and size of the entire FTM.
[0019]
In the optical fiber cable termination device of the present invention, the holding plate unit may include an optical splitter that branches one optical fiber into a plurality of optical fibers. Such an apparatus of the present invention makes it possible to enclose an optical multiplexer / demultiplexer that has been accommodated in a conventional star coupler rack in a holding panel unit, thereby reducing the space in the facility center and economically operating the facility. It becomes possible to do.
[0020]
Further, in the optical fiber cable termination device of the present invention, the holding panel, the connection panel, the alignment panel, the holding panel unit, and the test access unit are divided into a plurality of parts, and connection ports for the test measuring instruments of the plurality of test access units A second optical fiber selection device may be provided that selectively connects to the test meter. Such an apparatus of the present invention makes it possible to increase the number of optical cables for each predetermined number, thus enabling efficient operation.
[0021]
In the optical fiber cable termination device of the present invention, it is preferable that the optical fiber selection unit includes a visible light insertion unit and a bending unit that leaks visible light from the insertion / extraction optical fiber. Such an apparatus of the present invention can be identified by visible light leaking outside from the bent portion of the insertion / extraction optical fiber, so that it is possible to prevent erroneous operation of the insertion / extraction optical fiber when performing the switching operation.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of the optical fiber cable termination device of the present invention will be described.
[0023]
[First embodiment]
A first embodiment will be described with reference to FIGS. FIG. 1 is a front view of the FTM of the embodiment, FIG. 2 is a top view, FIG. 3 is a diagram showing a route of optical wiring in the FTM, and FIG. In these drawings, parts corresponding to those in FIGS. 9 to 11 are given the same reference numerals.
[0024]
In FIG. 1, 1 is an FTM, 26 is an aligning board, 27 is an insertion / extraction optical fiber, 28 is a subscriber optical fiber cable extra length processing component, 29 is an in-house terminated cable extra length processing component, and 30 is a connection panel front cord tray. , 32 is a subscriber system optical fiber cable fixing portion front cord tray, 34 is a subscriber optical fiber cable fixing portion, 39 is a front insertion / extraction optical fiber extra length storage portion, 47 is a connection board, and 49 is a holding board unit. In FIG. 2, reference numeral 31 is a connection panel rear cord tray, 33 is a subscriber optical fiber cable fixing portion rear cord tray, 35 is an in-house cable fixing portion, 36 is a subscriber optical fiber cable cord portion, and 37 is an in-house component. An end cable cord portion, 38 is a holding plate, 40 is a rear insertion / extraction optical fiber extra length storage portion, and 41 is an insertion / extraction optical fiber stopper. In FIG. 3, reference numeral 48 denotes a test access unit.
[0025]
The test access unit 48 accommodates a plurality of optical fibers from the subscriber optical fiber cable 17 and is composed of a plurality of optical couplers 2 and an FS 3 for connecting the optical couplers 2 and the TEM 11. The panel 47 is connected to the insertion / extraction optical fiber 27. The holding plate unit 49 accommodates a plurality of optical fibers from the second in-site optical fiber cable 16 and connects them to the inserting / extracting optical fibers 27 held by the holding plate 38 in units.
[0026]
Next, the wiring path of the optical fiber cable in the FTM will be described. The subscriber system optical fiber cable 17 is fixed by a subscriber system optical fiber cable fixing section 34, and the subscriber system optical fiber cable cord 36, which is the tip of the subscriber system optical fiber cable 17, is connected to the subscriber system optical fiber cable 17. The fixed part 34 is connected to the back side of the optical coupler 2 through the subscriber system optical fiber cable surplus length processing component 28 and the connection panel back cord tray 31. Here, in the subscriber optical fiber cable 17, the distal end portion on the optical coupler 2 side after the subscriber optical fiber cable fixing portion 34 is a subscriber optical fiber cable cord portion 36.
[0027]
The optical coupler 2 and the insertion / removal optical fiber 27 are fixed in a removable state from the optical connector adapter 23 provided on the connection board 47 on the front surface of the optical coupler 2 and the optical connector 24 of the insertion / removal optical fiber 27. The insertion / extraction optical fiber 27 includes a connection panel front cord tray 30, a front insertion / extraction optical fiber extra storage section 39, an alignment panel 26, a rear insertion / extraction optical fiber extra storage section 40, and a subscriber system optical fiber cable fixing section rear cord tray 33. Via, it is connected to the holding plate 38 and further connected to the back surface of the holding plate unit 49.
[0028]
The insertion / extraction optical fiber 27 accommodated in the holding panel unit 49 is connected to the in-house terminated cable cord portion 37 on the front surface of the holding plate unit 49, and the in-house terminated cable cord portion 37 is connected to the front surface of the subscriber optical fiber cable fixing portion. It is fixed to the in-house cable fixing portion 35 via the cord tray 32 and the in-house terminated cable surplus length processing component 29. The first in-house optical fiber cable 15 ahead of the in-house cable fixing part 35 is wired to another in-house device. Here, in the first in-situ optical fiber cable 15, the in-house terminated cable cord portion 37 is provided at the front end portion of the holding panel unit 49 after the in-house cable fixing portion 35.
[0029]
Next, a method of changing the connection of the insertion / extraction optical fiber 27 using the alignment board 26 will be described with reference to FIG. The insertion / removal optical fiber 27 is slidably loosely held on the alignment board 26. Therefore, the extra length portion of the insertion / removal optical fiber 27 is dispersed in the front insertion / removal optical fiber extra length storage part 39 and the rear insertion / extraction optical fiber extra length accommodation part 40. Let me store. In addition, when the connection is changed, even if there are many extra lengths of the insertion / extraction optical fiber 27 in the front insertion / extraction optical fiber extra length storage section 39, the optical connector 24 is once pulled up to the holding hole position of the alignment board 26, so that the operability is improved. And visibility can be secured.
[0030]
The connection of the insertion / extraction optical fiber 27 is changed by replacing the optical connector 24 of the insertion / extraction optical fiber 27 fixed to the first optical connector adapter 23 provided in the connection board 47 with the second optical connector adapter 23 provided in the connection board 47. Do by replacing. FIG. 4 (a) shows the connection state. The optical connector 24 of the insertion / extraction optical fiber 27 is fixed to the first optical connector adapter 23. In FIG. 4B, the optical connector 24 is pulled out from the first optical connector adapter 23. In FIG. 4 (c), the insertion / removal optical fiber 27 from which the optical connector 24 has been pulled out is pulled up from the rear surface of the alignment board 26, and the optical connector 24 of the insertion / removal optical fiber 27 is pulled back to the vicinity of the holding hole of the alignment board 26. As a result, the optical connector 24 can be selected from the front insertion / extraction optical fiber extra-length storage section 39 in which many extra lengths of the insertion / extraction optical fiber 27 are accommodated. In FIG. 4D, the optical connector 24 is selected, and the insertion / extraction optical fiber 27 is pulled out to the front surface of the alignment board 26 by a required length. At this time, the insertion / removal optical fiber 27 is positioned outside the other insertion / removal optical fibers, and the optical connector 24 of the insertion / removal optical fiber 27 is connected to the second optical connector adapter 23 provided in the connection board 47. In FIG. 4 (e), the extra length portion of the insertion / extraction optical fiber 27 is balanced in the front insertion / extraction optical fiber extra length storage portion 39 and the rear insertion / extraction optical fiber extra length storage portion 40 so as to ensure operability and visibility. Store.
[0031]
According to this embodiment, even if there is an extra length portion of the insertion / extraction optical fiber 27, the insertion / extraction optical fiber to be switched and the connector can be easily selected, so that the operation time for connection change can be shortened.
[0032]
[Second Embodiment]
In this embodiment, a carbon coated optical fiber is used for the insertion / extraction optical fiber 27. According to this embodiment, it was possible to prevent static electricity generated when the insertion / extraction optical fiber was rolled up and pulled out, and to prevent entanglement of the insertion / extraction optical fiber. Furthermore, in the example in which the antistatic agent was kneaded into the covering material of the insertion / extraction optical fiber, the effect of suppressing the generation of static electricity was further improved.
[0033]
[Third embodiment]
In this embodiment, the insertion / extraction optical fiber stopper 41 is attached to the insertion / extraction optical fiber 27. In FIG. 3, by attaching the insertion / removal optical fiber stopper 41 to the insertion / removal optical fiber 27 on the back side of the alignment board 26, it was possible to prevent the insertion / removal optical fiber 27 from being pulled out excessively. Since the optical connector 24 is provided on the front side of the aligning plate 26, the insertion / extraction optical fiber 27 is prevented from coming out to the front and rear surfaces of the aligning plate 26. The insertion / extraction optical fiber stopper 41 has a size and shape that cannot pass through the holding hole 44 of the alignment board 26, and prevents the bending / twisting due to excessive drawing of the insertion / extraction optical fiber 27 wired from the alignment board 26 to the holding board 38. Fulfill.
[0034]
[Fourth embodiment]
In this embodiment, an insertion / removal optical fiber identification symbol using a bar code is given to the insertion / removal optical fiber stopper 41. In this embodiment, since the required insertion / removal optical fiber 27 can be easily selected using a barcode reader, when the insertion / removal optical fiber 27 is wound up, the insertion / removal optical fiber 27 can be reliably and quickly inserted from the back of the alignment board 26. Was able to make a selection. As a result, it was possible to improve operability and prevent erroneous operation when changing connections.
[0035]
[Fifth embodiment]
In this embodiment, an example using the alignment board 26 shown in FIG. 5 will be described. In FIG. 5, 44 is a holding hole, 45 is an insertion / extraction optical fiber insertion slit, and 46 is an insertion / extraction optical fiber insertion slit lid. A method for attaching / detaching the insertion / removal optical fiber 27 to / from the alignment board 26 according to this embodiment will be described when the addition / removal of the insertion / removal optical fiber 27 is performed. First, when inserting, the slit lid 46 is removed, the insertion / extraction optical fiber 27 is inserted from the right side of the slit 45, and guided to the holding hole 44 of the alignment board 26. After the insertion, a slit lid 46 is attached so that the insertion / extraction optical fiber 27 does not come out. Next, when the insertion / extraction optical fiber 27 is extracted from the alignment board 26, the slit lid 46 is removed, the insertion / extraction optical fiber 27 is extracted from the holding hole 44, moved in the slit 45, and extracted from the right side of the slit 45. After the extraction, a slit lid 46 is attached so that the remaining other insertion / extraction optical fiber 27 does not come out. The diameter of the holding hole 44 of the alignment board 26 is approximately the same as the diameter of the insertion / extraction optical fiber 27, and the insertion / extraction optical fiber 27 is accommodated in the alignment board 26 at a high density.
[0036]
[Sixth embodiment]
In this embodiment, an example using the alignment board 26 shown in FIG. 6 will be described. In the configuration of the alignment board 26 in FIG. 6, the holding hole 44 is configured to have a size for accommodating a plurality of insertion / extraction optical fibers 27. Thereby, the insertion / extraction optical fiber 27 can be accommodated in the alignment board 26 at a higher density.
[0037]
[Seventh embodiment]
In this embodiment, as shown in FIG. 7, a configuration for identifying the insertion / extraction optical fiber 27 using visible light is used. Visible light generated by the He-Ne laser 43 is inserted from the FS master side optical fiber 14, passes through the FS 3, the test branch optical fiber 4 from the optical coupler 2, the optical coupler 2, and the connection board 47 to the insertion / extraction optical fiber 27. This laser light leaks to the outside at the bent portion of the insertion / extraction optical fiber 27 accommodated in the front insertion / extraction optical fiber extra length storage unit 39 and the rear insertion / extraction optical fiber extra length accommodation unit 40. By visually observing this leakage light, the insertion / extraction optical fiber 27 could be identified. As a result, when the insertion / removal optical fiber 27 is wound up, the insertion / removal optical fiber 27 can be selected reliably and quickly from the rear surface of the aligning panel 26, so that workability can be improved when performing connection switching work, and erroneous operation is prevented. We were able to. The same effect was obtained even when a semiconductor laser was used instead of the He—Ne laser as a visible light source.
[0038]
[Eighth embodiment]
In this embodiment, as shown in FIG. 8, the holding panel unit 49 includes a splitter module 42 including the optical multiplexer / demultiplexer 5 and the transmission device side optical filter 6. By adopting such a configuration, it is possible to adopt a configuration in which a conventionally used star coupler rack is taken into the FTM, and the space occupied by the FTM in the facility center can be reduced. The splitter module 42 can be a detachable unit.
[0039]
【The invention's effect】
As described above, according to the FTM of the present invention, in the connection between the subscriber optical fiber cable and the in-house optical fiber cable, the structure including the holding panel, the connection panel, the alignment panel, and the insertion / extraction optical fiber is used. It is possible to improve the long capacity, prevent the entanglement when the connection is changed, and improve the workability when the connection is changed. In addition, by using an insertion / extraction optical fiber identification system using a bar code or a visible light source, it is possible to prevent an erroneous operation in a connection switching operation. In addition, by making the splitter module a detachable unit, a flexible system design according to the network form becomes possible.
[Brief description of the drawings]
FIG. 1 is a front view of an embodiment of an optical fiber cable termination device of the present invention.
FIG. 2 is a top view of the embodiment of FIG.
FIG. 3 is a diagram showing a route of optical wiring in the optical fiber cable termination device.
FIG. 4 is a diagram for explaining a procedure of connection switching work;
FIG. 5 is a diagram illustrating an embodiment of an alignment board in the optical fiber cable termination device of the present invention.
FIG. 6 is a view for explaining another embodiment of the alignment board in the optical fiber cable termination device of the present invention.
FIG. 7 is a diagram illustrating a configuration for identifying an insertion / extraction optical fiber using visible light in the optical fiber cable termination device of the present invention.
FIG. 8 is a diagram illustrating a splitter module in the optical fiber cable termination device of the present invention.
FIG. 9 is a diagram showing a configuration of in-house equipment including a conventional optical fiber cable terminator.
FIG. 10 is a diagram showing a configuration of a conventional optical fiber cable terminator including an optical coupler and an FS.
FIG. 11 is a diagram showing a configuration of a connection portion in a conventional optical fiber cable termination device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Optical fiber cable termination apparatus 2 Optical coupler 3 Optical fiber selection apparatus (FS) of this invention
4 Test optical fiber from optical coupler 5 Optical multiplexer / demultiplexer 6 Transmission device side optical filter 7 Communication system optical subscriber line terminal equipment 8 Video system optical subscriber line terminal equipment 9 Optical subscriber line terminal equipment accommodation Rack 10 Star coupler rack 11 Test equipment rack (TEM)
12 Test Equipment 13 Optical Fiber Selector Control and Test Equipment Selector (FTES)
14 FS master-side optical fiber 15 first-site optical fiber cable 16 second-site optical fiber cable 17 subscriber-system optical fiber cable 18 subscriber-side optical filter 19 communication system optical subscriber line terminator 20 video system optical subscriber line terminal Device 21 Extra length distribution member 22 Extra length processing shelf 23 Optical connector adapter 24 Optical connector 25 Single-core tape core connection part 26 Alignment board 27 Insertion / extraction optical fiber 28 Subscriber system optical fiber cable extra length processing component 29 In-house termination cable extra length Processing part 30 Connection panel front cord tray 31 Connection panel rear cord tray 32 Subscriber system optical fiber cable fixing part Front code tray 33 Subscriber system optical fiber cable fixing part Rear code tray 34 Subscriber system optical fiber cable fixing part 35 Local cable Fixed part 36 Subscriber optical fiber cable cord part 37 Cable cord portion 38 Holding plate 39 Front insertion / extraction optical fiber extra length storage portion 40 Rear insertion / extraction optical fiber extra length accommodation portion 41 Insertion / extraction optical fiber stopper 42 Splitter module 43 He-Ne laser 44 Holding hole 45 Insertion / extraction optical fiber insertion slit 46 Insertion / extraction optical fiber Insert slit lid 47 Connection board 48 Test access unit 49 Holding board unit 100 Conventional optical fiber cable terminator

Claims (8)

The optical fiber group of the subscriber optical fiber cable (17) which is the first optical fiber group and the optical fiber group of the intra-office optical fiber cable (16) which is the second optical fiber group are connected to the optical fiber test apparatus (11 ) test access units to accommodate said first optical fiber group comprises optical coupler (2) which is connected (48), and via a holding plate unit (49) for accommodating the second optical fiber group In a fiber optic cable terminator connected in a switchable manner,
The optical fiber cable terminator has a plurality of insertion / extraction optical fibers (27) for connecting the optical coupler (2 ) of the test access unit (48) and the holding panel unit (49) , as well as holding these test access units. A connection panel (47) holding a plurality of optical connector adapters (23) connected to the input / output ports on one side of the optical coupler, and the insertion / extraction optical fiber are movable between the panel unit and the panel unit. An alignment board (26) having a plurality of through holes to hold, and a holding board (38) to hold the insertion / extraction optical fiber ,
Connecting the first optical fiber group to an input / output port on the other side of the optical coupler;
The optical connector (24) is connected to one end of the insertion / extraction optical fiber , and these optical connectors (24) are detachably attached to the optical connector adapters (23) of the connection panel, respectively , and the other end of the insertion / extraction optical fiber. Is stored in the holding plate unit (49) through each through hole and holding plate of the alignment plate ,
Optical fiber storage portions (39, 40) for storing the pre-length portions of the insertion / extraction optical fibers are provided on both sides of the alignment board (26) , respectively, and the optical fiber (27) pre- requisites required for switching the insertion / extraction optical fibers are provided. An optical fiber cable terminator characterized in that a long portion is accommodated in the optical fiber accommodating portion .   2. The optical fiber cable terminator according to claim 1, wherein the insertion / extraction optical fiber is an optical fiber containing an antistatic agent in its coating.   The optical fiber cable terminator according to claim 1 or 2, wherein the insertion / extraction optical fiber is a carbon coated optical fiber.   The optical fiber cable terminator according to any one of claims 1 to 3, wherein the insertion / extraction optical fiber has a stopper that is retained by a holding hole of an alignment board.   The optical fiber cable termination device according to any one of claims 1 to 4, wherein the insertion / extraction optical fiber is provided with an identification code.   The insertion hole for inserting an insertion / extraction optical fiber or an insertion slit common to a plurality of holding holes is formed in each holding hole of the alignment board. The optical fiber cable terminator described.   The optical fiber cable termination device according to any one of claims 1 to 6, wherein a diameter of the holding hole of the alignment board is a diameter capable of holding a plurality of insertion / extraction optical fibers. .   The optical fiber cable termination device according to any one of claims 1 to 7, wherein the holding plate unit includes an optical splitter that branches one optical fiber into a plurality of optical fibers.

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