JPH11133250A - Optical wiring board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical wiring board capable of easily connecting arm optical fiber drawn out from an optical cable to another optical fiber in accor dance with the existence of its termination and the existence of line monitoring. SOLUTION: In the optical wiring board 20, a switching optical fiber 33a connected to an optical, cable side optical fiber 28 or 31 through a device side termination part 21a is connected to a switching optical fiber 33b connected to a transmitter side optical fiber 35 through a coupler module 55. Consequently the fiber 28 or 31 is switchably connected to the objective fiber 35, connected also to a line monitoring device and can be switched also to a connection by- passing the module 55 only by the operation of the fibers 33a, 33b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical distribution board,
In particular, the present invention relates to an optical distribution board provided with a line monitoring device for monitoring a disconnection or the like of an optical line.

[0002]

2. Description of the Related Art FIG. 14 is a front view showing a conventional optical distribution board. In FIG. 14, reference numeral 1 denotes a box, and a plurality of optical cables 2 are drawn in from above or below. These optical cables 2 are arranged along the side plate 10 of the box 1, and a cable clamp 4b
The optical fiber core 3a is fixed by a tension member clamp 4c, and is led out. These optical fiber cores 3a are connected to the fusion tray tray storage T1 at the bottom of the box 1.
, And are sorted and stored in a multi-layered draw-out type fusion part tray 6, 6,... In the fusion part tray storage part T1. In each of the fusion trays 6, 6,..., The optical fiber core wire 3a is connected to one end of the branch-out fan-out cord 3b, which is not branched, via a fusion splicing reinforcement (not shown). The fusion trays 6, 6,... Are accommodated in a slide unit 12 attached to the back plate 11 of the box 1 in the fusion tray tray storage T1, and are moved in the front-rear direction (FIG. 14).
It can be pulled out and stored in the depth direction of the paper).

[0003] The fan-out code 3b is pulled out upward through a center tray 9 installed above the fusion part tray storage section T1.
b are introduced from the left side in the drawing into the drawer-type branch connection trays 8, 8,... stacked in multiple stages in the branch connection tray storage portion T2 installed above the center tray 9, The connection is switchably connected to a jumper code j (optical code) introduced into the branch connection tray 8 from the right through an optical connector (not shown). The branch connection trays 8, 8,... In the branch connection tray storage section T2 are guided / guided by guide rods 15 protruding from the back plate 11 of the box 1 to be pulled out / stored in the front-rear direction (the depth direction in FIG. 14). It is possible. The jumper code j is wired between the two branch connection trays 8, 8, and is connected to the other branched end of the fan-out cord 3 b in the branch connection tray 8, thereby connecting the target optical lines. The extra length of the jumper code j is stored in the branch connection tray storage section T2,
Alternatively, wiring is performed by using the support 4 (cord clamp) on the side surface of the box 1 so as to be folded back.

[0004] In the branch connection tray 8, the crossover wiring storage trays 9 a, 9 arranged above and below the box 1.
In some cases, the fan-out cord 3b may be connected to the connecting wire 3d (optical cord) introduced into the box 1 from b. Thereby, the optical line drawn into the box 1 by the optical cable 2 can be connected to the optical line outside the box 1. Box 1
A large number of support members 4 are protruded from the inner surface side of both side plates 10, and the fan-out cords 3 b,
The jumper code j and the wiring 3d are detachably clamped and retained with an appropriate clamping force that does not affect the optical transmission characteristics.

In recent years, with the increase in complexity of optical fiber networks, measures have been taken to increase the number of connections and branches of optical lines using a plurality of optical distribution boards. When a plurality of optical distribution boards are used, a plurality of optical distribution boards connected in series are connected by a jumper cord or the like, so as to correspond to the number of connections and the number of branches of the optical line. FIG. 15 is a front view showing an example of an optical distribution board with an increased number of corresponding cores. This optical distribution board has a line-side frame 17 that terminates an optical fiber 16a drawn from the line-side optical cable 16 so as to be connectable.
A device-side frame 19 that terminates the optical fiber 18 on the transmission device side so as to be connectable; the line-side frame 17 and the device-side frame 1
9 and a relay frame C for housing a jumper code j wired between the relay frame C and the relay frame C. The line side frame 18 includes a fusion section tray storage section 18a and a branch connection tray storage section 18b. The apparatus side frame 19 includes a branch connection tray storage section 19b. The optical fiber 1 on the line side is wired between the branch connection tray storage sections 18b and 19b.
The optical line according to 6a and the optical line according to the optical fiber 18 on the transmission device side are switchably connected. In addition, in order to test a disconnection or the like of an optical line by using a test optical pulse, a line monitoring device is connected to the corresponding optical line via a coupler unit having a built-in optical coupler.

[0006]

By the way, in order to perform line monitoring on a specific optical line, an optical fiber of an optical line to be monitored is connected to a line monitoring device by a coupler unit installed in an existing optical distribution board. Or it must be connected to a line monitoring device by pulling it into an optical distribution board dedicated to the coupler unit separately installed. However, FIG.
When the coupler unit is installed in the optical wiring board shown in FIG. 5, the size of the optical wiring board is increased, or the number of optical lines connected due to the difficulty in securing a wiring space for optical fibers in the optical wiring board. This makes it difficult to increase the number of corresponding hearts. On the other hand, when an optical wiring board dedicated to the coupler unit is installed, problems such as difficulty in securing an installation space and an increase in cost arise.

In the case where the coupler unit is installed in the optical distribution board shown in FIG. 14, for example, the fan-out cord 3b connected to the optical fiber core wire 3a on the optical cable 2 side is connected to the branch connection tray storage T2 by a single core. The optical line for branching and monitoring the line is connected to an optical fiber laid between the branch connection tray storage T2 and the coupler unit. However, since the inside of the optical wiring board becomes narrow due to the installation space of the coupler unit and the like, the jumper code j
In such a case, it is not possible to secure a sufficient space for switching optical fibers for switching, and the switching workability is greatly reduced, and it is difficult to increase the number of corresponding cores. In addition, there has been no suitable coupler unit that enables switching connection between optical fibers connected via the coupler unit, and therefore, switching workability cannot be performed quickly.

In view of the above problems, optical fibers related to an optical line for performing line monitoring are gathered in the vicinity of a coupler unit installed in an optical distribution board, and an optical fiber for which line monitoring is not performed is placed in a place separated from the coupler unit. Although a measure for collecting and distributing and collecting them is conceivable, a useless storage space may be generated in the optical distribution board due to a difference in the number of distributed optical fibers, and the problem cannot be fundamentally solved.
In the case where an optical cable with a connector having an optical fiber with a connector terminated in advance is drawn into the optical distribution board and connected to another optical fiber, for example, as shown in FIG. The portion T1 and the fusion tray tray storage portion 18a of the optical wiring board shown in FIG. 15 may be wasted, and there is also a problem that the volume in the optical wiring board cannot be sufficiently and effectively used.

When the distribution wiring is performed in accordance with the presence / absence of the line monitoring, in order to switch the presence / absence of the line monitoring in the optical distribution board, the optical fiber is connected to the coupler unit in addition to the corresponding optical fiber. There is also a problem that it is difficult to improve the switching workability because it is necessary to move the optical fiber or the like connected to the switch. Moreover, if it is necessary to efficiently switch the presence or absence of line monitoring for both the optical fiber of the cable with connector and the optical fiber of a general optical cable that is not terminated with a connector, there has been no appropriate technology so far. Development was required.

The present invention has been made in view of the above-mentioned problem, and provides an optical distribution board which achieves the following objects. According to the first aspect of the present invention, (a) the optical fiber on the optical cable side and another optical fiber are switchably connected via the coupler module. According to the invention of claim 2, switching can be efficiently performed by the coupler module.
(B) By connecting the monitoring terminal to the connection terminal of the optical fiber selecting device, the coupler module is connected to the line monitoring device via the optical fiber selecting device, and the optical fiber on the optical cable side connected to the coupler module; Line monitoring of the optical fiber on the device side and the switching optical fiber can be performed efficiently. According to the invention described in claim 3,
(C) The optical connection part and extra length of the optical fiber drawn from the optical cable and the optical fiber for coupler connection connected to the coupler module can be stored compactly by the connection module, and the volume in the frame can be more effectively used. (D) By selecting the presence or absence of a connection module, switching connection between the optical fiber and another optical fiber can be efficiently performed in accordance with the type of the optical fiber drawn from the optical cable.

[0011]

According to the present invention, an optical fiber drawn out of an optical cable is connected to a switching optical fiber so as to be switchably connected to the line, and an optical fiber on the transmission device side is connected to the switching optical fiber. An optical fiber on the optical cable side, and an optical fiber on the transmission device side for an optical fiber selecting device connected to a line monitoring device for monitoring an optical line by an optical pulse; A fiber and a coupler unit accommodating one or a plurality of coupler modules for connecting the switching optical fiber via an optical coupler are housed in a frame, and the coupler module is provided with an optical fiber on the optical cable side and the transmission device. Light, characterized in that any two selected from the side optical fiber and the switching optical fiber can be switched and connected via the optical coupler. The line board was solutions of the problems.

According to the present invention, of the optical fiber on the optical cable side, the optical fiber on the transmission device side, and the switching optical fiber,
By connecting two components that are connected to each other to the same coupler module, they can be connected via an optical coupler included in the coupler module. The number of optical fibers on the optical cable side, the optical fibers on the transmission device side, and the switching optical fibers connected by the same coupler module is one or several, and when the number of connections is large, the connection is organized by a plurality of coupler modules. . The optical fiber connected via the coupler module is also connected to the line monitoring device at the same time. Therefore, the line monitoring of the optical fiber on the optical cable side and the optical fiber on the transmission device side can be easily performed simply by connecting to the coupler module via the switching optical fiber or directly. Moreover, the connection between the optical fiber on the optical cable side and the optical fiber on the transmission device side can be switched by simply switching the connection of the optical fiber on the optical cable side, the optical fiber on the transmission device side, and the switching optical fiber to the coupler module. is there. As a track monitoring device, a so-called OTDR (Optical time domain reflecto) is used.
It is common to employ an optical pulse tester such as a meter). In general, a line monitoring apparatus including an optical pulse tester includes an optical fiber selection device that sends a test pulse to an optical line by selecting an optical fiber core. One or a plurality of coupler modules are connected to the same optical fiber selection device via a monitoring terminal and a connection terminal.

According to the present invention, the coupler module comprises: an optical fiber on the optical cable side;
An optical fiber on the transmission device side, a pair of adapter portions to which any one or more of the switching optical fibers are switchably connected to a connector, and a monitoring device connected to a connection terminal of the optical fiber selection device. It is more preferable to adopt a configuration that includes a terminal and the optical fibers connected to both adapter portions are connected via the optical coupler and further connected to the line monitoring device. To the adapter part, the ends of the optical fiber on the optical cable side, the optical fiber on the transmission device side, and the switching optical fiber which are terminated by an optical connector plug (hereinafter referred to as "plug termination") are switchably connected. You. In a cable with a connector,
The optical fiber drawn into the optical distribution board and drawn out to the terminal is connected directly to the adapter section of the coupler module, or is connected to the adapter section via the switching optical fiber connected at the line side termination. The switching optical fiber is a so-called jumper cord, and since both ends are plug-terminated, it can be directly connected to the adapter.

When the optical fiber drawn out to the terminal of the optical cable is not terminated with a plug or is terminated with an optical connector plug which is not compatible with the adapter of the coupler unit, the optical fiber is connected to the coupler module. In order to perform line monitoring, for example, as described in claim 3, an optical fiber on the optical cable side or an optical fiber on the transmission device side that is not terminated so as to be connectable to a connector and a coupler connected to the coupler module are connected. It is possible to adopt a configuration including incorporating a connection module for housing an optical connection portion connected to an optical fiber for use in the coupler unit. In this configuration, the optical fiber on the optical cable side is connected to another optical fiber via the coupler unit by connecting the optical fiber drawn from the optical cable to the coupler connecting optical fiber connected to the coupler module by the connection module. can do. As the coupler-connecting optical fiber, an optical fiber drawn out of the coupler module or a terminating optical fiber plugged so as to be connectable to the adapter part of the coupler module according to the second aspect is employed. As an optical connection part between the optical fiber drawn from the optical cable and the optical fiber for coupler connection connected to the coupler module, a fusion splicing part, an optical connector or the like is employed. The optical fiber plugged to be connectable to the adapter portion of the coupler module serves to terminate the optical fiber on the optical cable side so as to be connectable to the adapter portion. If the optical fiber is terminated by an optical connector plug that does not fit into the adapter part, the optical fiber on the optical cable side and the optical fiber for coupler connection are connected via an optical connector and the plug is terminated so as to fit the adapter part. It is also possible.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of an optical wiring board according to the present invention will be described below with reference to FIGS. FIG. 1 is a front view showing an optical wiring board 20 of the present embodiment. The optical wiring board 20 has a configuration in which a line-side frame 21 and a device-side frame 23 are connected via a relay frame 22. The line side optical cables 24 and 25 are drawn into the line side frame 21. The optical cable 24 is drawn into the inside from the upper part of the track-side frame 21, and the cable fixture 2 on the side of the track-side frame 21.
6 and the tension member fixture 27. Optical cable 2 near the tension member fixture 27
The optical fiber 28 (line-side optical cord) drawn from the four terminals is connected to the line-side termination 2 provided on the line-side frame 21.
1a are drawn into the desired one of the termination units 29, 29,... Housed in multiple stages from the back side (the back side in FIG. 1). On the other hand, the optical cable 25 is a so-called cable with a connector, and is fixed to the cable-with-connector fixing section 30 above the line side frame 21. A termination unit 29 in which optical fibers 31 (line-side optical cords) drawn out in the vicinity of the connector-attached cable fixing portion 30 are stored in multiple stages in a line-side termination 21 a provided in the line-side frame 21. The back side of the target termination unit 29 (FIG. 1)
It is pulled in from the inner side of the paper. Each of the line-side optical fibers 28 and 31 is drawn into the target termination unit 29 from the back side in FIG. In FIG. 1, reference numeral 32 denotes a radius maintaining member that maintains the bending radius of the hooked optical fibers 28, 31.

The optical cables 24, 2
The optical fibers 28 and 31 extracted from 5 are switchably connected to another switching optical fiber 33 (jumper cord) by the termination unit 29. Switching optical fiber 3
3 is pulled into the device-side frame 23 from the termination unit 29 via the relay frame 22, and the device-side cord cable 3
4 is connected to a single-core or multi-core optical fiber 35 (device-side optical cord) on the transmission device side. In the relay frame 22, the switching optical fiber 33 is supported by the cord support member 36, and the bending radius of the switching optical fiber 33 is secured.

The cord cable 34 is connected to the device-side frame 2.
The device-side optical fiber 35 is fixed to the cord cable fixing portion 37 attached to the upper part of the device 3 and pulled out near the cord cable fixing portion 37. In the device-side frame 23, a plurality of termination units 38 for switchingably connecting the device-side optical fiber 35 and the switching optical fiber 33 are housed, and the device-side optical fiber 35 pulled out from the cord cable 34. Is pulled into the intended termination unit 38 while securing a bending radius via a plurality of cord supports 39 protrudingly provided on the side of the device side frame 23, and the switching optical fiber 33 and the Connected.

FIG. 3 is a side view showing an example of the termination unit. In FIG. 3, the termination unit 38 is an adapter panel 4 on which a number of optical connector adapters 40 are attached.
1 is provided. The end of the device-side optical fiber 35, which is connected to the optical connector plug by the optical connector plug, is inserted into the optical connector adapter 40 from the cable side (the right side in FIG. 3) of the adapter panel 41, and the jumper side (in FIG. 3). Switching optical fiber 33 inserted from left side)
Is switchably connected to the plug-terminated end. FIG.
Reference numeral 38a denotes a cord receiving gutter, which is rotatably supported in the direction of the arrow in FIG. The termination unit housed in the device-side frame 23 is not limited to the above-described configuration, and various configurations can be employed as long as the device-side optical fiber 35 and the switching optical fiber 33 can be connected.

Next, an example of the termination unit 29 housed in the track side frame 21 will be described with reference to FIGS.
In FIG. 4, the termination unit 29 includes a unit main body 42 supported by the track side frame 21, an adapter panel 43 erected on the unit main body 42, and the unit main body 4.
2 and a plurality of thin connection modules 44 arranged side by side. A plurality of optical connector adapters 45 are fixed to the adapter panel 43 side by side. The connection modules 44 are arranged side by side in parallel with the arrangement of the optical connector adapters 45, and the connection modules 44 and the optical connector adapters 45 correspond one-to-one. Each connection module 44 is detachably engaged with an engagement bar 46 mounted on the unit main body 42 by an engagement claw 47, and rotates in a vertical plane around the engagement bar 46 as shown in FIG. It is free. A support bar 48 is attached in parallel near the engagement bar 46 so that the connection module 44 rotated in the direction of the adapter panel 43 is stably supported by being placed on the support bar 48. Has become.

In FIG. 5, reference numeral 49 denotes a core wire duct,
Reference numeral 9a denotes a code duct for routing optical fibers 28, 31 and the like into the line side frame 21. The optical fiber 28 drawn out of the code duct 49a into the termination unit 29 is connected to the other end of a termination optical fiber 51 terminated at one end by an optical connector plug 50 connectable to the optical connector adapter 45. The connection is made via a connection 52 (fusion connection). The optical connection section 52 is housed in the connection module 44 with an extra length. Thereby, the optical fiber 2
Reference numeral 8 denotes an optical connector adapter 4 using a terminated optical fiber 51.
The optical connector plug 50 is inserted into the optical connector adapter 45 from the cable side (the right side in FIG. 5) of the adapter panel 43 to connect the optical connector adapter 45 from the jumper side (the left side in FIG. 5). It is switchably connected to the switching optical fiber 33 to be inserted. As shown in FIG. 6, since the connection module 44 can be opened and closed, the work of storing the optical connection portion 52 and the extra length can be performed efficiently.

When the optical fiber 28 is a multi-core optical fiber composed of an optical fiber core or the like, as shown in FIG. 5, one end is connected to a plurality of single core wires 51a each terminated by a single core optical connector plug 50. A terminated optical fiber 51 is used which is branched and the other end of which is a multi-core optical fiber 51b having the number of cores connectable to the optical fiber 28. At this time, the branch 51c of the multi-core optical fiber 51b and the single core 51a is also housed in the connection module 44 together with the optical connection 52 and the like.

On the other hand, the optical fiber 31 pulled out from the code duct 49a into the termination unit 29 connects the optical connector plug 53 at the tip directly to the target optical connector adapter 45.
Connect to At this time, since the connection module 44 at the position corresponding to the corresponding optical connector adapter 45 is unnecessary,
By detaching, the workability of attaching and detaching the optical connector plug 53 to and from the optical connector adapter 45 can be improved. When the connection to the optical connector adapter 45 is changed from the optical fiber 31 to the termination optical fiber 51 connected to the optical fiber 28, the connection can be switched by installing the connection module 44.

The termination unit 29 includes the optical cables 24, 2
The configuration is not limited to the above-described configuration, and various modifications are possible as long as the configuration is such that connection can be made to the optical connector adapter 45 in accordance with the presence or absence of the termination of the optical fibers 28 and 31 drawn out of the connector 5. The termination unit having the configuration shown in FIGS. 4 to 6 can also be applied to the device-side frame 23. In this case, the device-side optical fiber 3 terminated with a plug is used.
5, it is possible to cope with an unterminated device side optical fiber.

As shown in FIG. 1, an optical fiber selecting device 58 ("fs" in the figure) of a line monitoring device utilizing an optical pulse is accommodated in a lower portion of the device side frame 23, and a coupler unit 5 is provided.
4 are stored. FIG. 7 shows the coupler unit 54. 7, the coupler unit 54 has a plurality of thin, synthetic resin-made coupler modules 55 each containing a built-in optical coupler (not shown) arranged side by side in the depth direction of FIG. 7 (see FIG. 1). On both sides of the coupler module 55, adapter portions 56 are arranged to face each other. On the jumper side (left side in FIG. 7) of the coupler unit 54, one adapter section 56 of each coupler module 55 is arranged. As a result, as shown in FIG.
In 4, the large number of adapter sections 56 are mounted at high density. An optical connector plug 53 at the tip of the switching optical fiber 33 is switchably connected to the adapter section 56. In some cases, optical fiber 3 of cable 25 with connector
1, and the plug-terminated end of the device-side optical fiber 35 is connected. The coupler module 55 includes a monitoring terminal 55a connected to the optical coupler, and the monitoring terminal 55 is connected to a connection terminal 57 of an optical fiber selection device 58 connected to the line monitoring device. In FIG. 7, reference numeral 54a denotes a unit main body, and 54b denotes a cord receiving gutter.

The switching optical fibers 33 connected to the adapter sections 56 on both sides are connected via the optical coupler, and further connected to an optical fiber selecting device 58. Also, the switching optical fiber 33 is connected to one adapter section 56,
Even if no optical fiber is connected to the other adapter,
The switching optical fiber 33 connected to the adapter unit 56 can be connected to the line monitoring device, so that the optical line of the switching optical fiber 33 can be monitored. This means that the optical fibers 31 and 3
The same applies to the case where 5 is connected.

FIG. 2 is a conceptual diagram showing the optical wiring in the optical wiring board 20. In FIG. 2, the optical fiber 2 on the line side
In the case of monitoring the line 8 or 31, one end of the switching optical fiber 33 a (33) is connected to the target optical fiber 28 or 31 at the line side termination 21 a and the other end of the switching optical fiber 33 a is connected. The end is connected to the coupler module 55. Thereby, the target optical fiber 28 or 31
Can be connected to the optical fiber selecting device 58 for line monitoring. On the other hand, when performing line monitoring on the device-side optical fiber 35, one end of the switching optical fiber 33b (33) is connected to the target device-side optical fiber 35 at the device-side termination 23a, and the switching light is output. By connecting the other end of the fiber 33b to the coupler module 55, the line of the device-side optical fiber 35 can be monitored by the optical fiber selecting device 58.

The switching optical fiber 33a connected to the optical fiber 28 or 31 and the switching optical fiber 33b connected to the apparatus-side optical fiber 35 are connected to the adapter section 56 from both sides facing the same coupler module 55, respectively. Then, the target optical fiber 28 or 31 and the device-side optical fiber 35 are connected via the coupler module 55, and the optical fiber 28 or 3 on the line side is connected.
Line monitoring of both the optical line 1 and the device-side optical fiber 35 can be performed. In this case, by switching the switching optical fiber 33a or 33b to the coupler module 55, the switching connection between the optical fiber 28 or 31 and the device-side optical fiber 35 can be easily performed. There is no need to move the optical fibers 28 and 31 and the device-side optical fiber 35. The switching connection of the switching optical fibers 33a and 33b to the coupler module 55 includes switching between the coupler modules 55 and the multi-core adapter section 5.
6 includes switching of a single-core optical connector plug.

When the optical fiber 28 or 31 is connected to the device-side optical fiber 35 and line monitoring is not performed,
At the line-side termination 21a, the switching optical fiber 33c (3
One end of 3) is connected to the target optical fibers 28 and 31, and the other end of the switching optical fiber 33c is connected to the target device-side optical fiber 35 at the device-side termination 23a. The switching connection between the optical fiber 28 or 31 and the device-side optical fiber 35 can be easily performed by switching the switching optical fiber 33c.
There is no need to move 5.

The optical fiber 31 of the optical cable 25, which is a cable with a connector, and the device-side optical fiber 35 with a plug can also be directly connected to the adapter 56 of the coupler module 55. in this case,
Since the number of switching optical fibers 33a, 33b, 33c can be reduced, it is possible to save the space of the optical distribution board 20 and to improve the switching workability by the switching optical fibers 33a, 33b, 33c. It goes without saying that the optical fiber 31 and the device-side optical fiber 35 connected to the adapter unit 56 can be switched and connected.

According to the optical distribution board 20, the presence or absence of the line monitoring of the optical fibers 28 and 31 and the device side optical fiber 35 can be easily switched by switching connection of the switching optical fibers 33a, 33b and 33c. That is, for the optical fiber 28 or 31 and the device-side optical fiber 35 connected by the switching optical fiber 33c, the connection by the switching optical fiber 33c is released, and the coupler module 55 is connected by using the switching optical fibers 33a and 33b. By connecting to the line, it is possible to easily switch from without line monitoring to with line monitoring. Conversely, the switching optical fiber 3
For the optical fiber 28 or 31 connected to the coupler module 55 by 3a and the device-side optical fiber 35 connected to the coupler module 55 by the switching optical fiber 33b, the connection by the switching optical fibers 33a and 33b is released, By connecting to each other by the switching optical fiber 33c, it is possible to easily switch from the line monitoring to the line monitoring without line monitoring. As described above, the presence or absence of the line monitoring can be easily switched by the switching connection of the switching optical fibers 33a, 33b, 33c, and at the time of this switching work, the optical fibers 28, 31 and the device side optical fiber 35 are moved. Work is unnecessary. Further, the switching operation of the switching optical fibers 33a, 33b, 33c is performed as follows.
This can be performed collectively in the relay frame 22 and the coupler unit 54, and high workability can be obtained.

In the conventional optical wiring board shown in FIGS. 14 and 15, when monitoring the optical line, it is necessary to provide a space for mounting the coupler unit, and furthermore, to install the fusion unit tray storage unit. In the optical distribution board 20, the optical fibers 28 and 31 on the line side and the optical fibers on the device side are compared with the space and the wiring length of the optical fiber from the fusion part tray storage part to the branch connection tray storage part. And switching optical fibers 33a, 33b,
Since c also serves as a connection with the coupler unit 55, the amount of wiring of the internal optical fibers can be greatly reduced. As a result, the number of connections between the optical fibers 28 and 31 and the device-side optical fiber 35 increases, and Becomes possible. Also, in the conventional optical wiring board, the configuration of the fusion unit tray storage unit and the branch connection tray storage unit is special, and it is difficult to reduce the cost and space. In FIG. 20, the termination units 29 and 38 capable of mounting the optical connector adapters 43 and 41 with high density are adopted, so that cost reduction and significant space saving can be easily achieved. In particular, in the termination unit 29, the optical connection portion 52 and the extra length of the unterminated optical fiber 28 and the termination optical fiber 51 can be stored compactly, and the optical fiber 2
Since it is possible to cope with the presence or absence of the termination of 8, 31 in units of the number of connection cores of the optical connector adapter 43, the inconvenience of producing an unnecessary space in the optical wiring board 20 is eliminated, and the volume in the optical wiring board 20 is reduced. It can be used very effectively.

FIG. 8 shows another embodiment of the coupler module 59 applied to the coupler unit 54. Like the coupler module 55, the coupler module 59 is formed in a thin plate shape from a synthetic resin such as plastic, and is housed in the coupler unit 54 side by side. The coupler module 59 includes a coupler connection optical fiber 59a pulled out, an adapter portion 59b, and a connection terminal 5.
7 and a monitoring terminal 59c connected to the optical fiber 59a and the optical line connected to the adapter 59b via an optical coupler (not shown) housed therein. Optical connection is made, and these optical lines are further connected to a monitoring terminal 59c and a connection terminal 57, an optical fiber selecting device 58.
And is also connected to a track monitoring device.
The optical fiber 59a for connecting the coupler is an optical connector plug 59.
It is terminated by d, and can be connected to the optical connector adapter 45 of the adapter panel 43 of the line-side termination unit 29 and the optical connector adapter 40 of the adapter panel 41 of the transmission-side termination unit 38.

When the coupler module 59 is housed in the coupler unit 54 instead of the coupler module 55,
Instead of the switching optical fibers 33a and 33b (see FIG. 2), a coupler connecting optical fiber 59a can be used instead. That is, the coupler-connecting optical fiber 59a is connected to the optical connector adapter 45 of the adapter panel 43 of the line-side termination unit 29 (not shown in FIG. 2) or the transmission-device-side termination unit 38 (not shown in FIG. 2). By connecting to the optical connector adapter 40 of the adapter panel 41, the same function as the switching optical fibers 33a and 33b can be achieved. On the other hand, as in the case of the coupler module 55, the switching optical fibers 33a and 33
b, or the line side optical fiber 31 and the device side optical fiber 35 are switchably connected. This coupler module 5
In No. 9, since the number of connection points can be reduced by using the coupler connection optical fiber 59a as compared with the case where the switching optical fibers 33a and 33b are used, the number of connection work steps can be reduced and work efficiency can be improved. At the same time, the number of the switching optical fibers 33a and 33b can be reduced, so that the cost can be reduced.

FIG. 9 shows another embodiment of the coupler module 60 applied to the coupler unit 54. Like the coupler module 55, the coupler module 60 is formed in a thin plate shape from a synthetic resin such as plastic, and is housed in the coupler unit 54 side by side in a plurality. The coupler module 60 includes a coupler connection optical fiber 60a pulled out, an adapter section 60b, and a connection terminal 5.
And an optical coupler (shown in the figure) that connects the optical line on the coupler connecting optical fiber 60a side, the optical line on the adapter section 60b side, and the optical line on the monitoring terminal 60c side to each other. Zu) built-in.

The coupler module 60 is used together with a connection module 61. That is, in the coupler module 60, the line-side optical fiber 28 drawn into the optical distribution board 20 is connected to the coupler-connecting optical fiber 60a, so that the connection can be made without passing through the line-side termination unit 29. Is possible. The same applies to the case where the device-side optical fiber that has not been terminated with a plug is drawn into the optical distribution board 20. Optical fiber 28
Connection part 61a between the optical fiber 60a and the coupler connecting optical fiber 60a
The fusion spliced portion is compactly stored in the connection module 61 together with the extra length. The connection module 61 is formed in a thin plate shape from a synthetic resin or the like, is rotatably supported in a vertical plane by a support shaft 62 mounted in the coupler unit 54, and is arranged side by side similarly to the coupler module 60 (FIG. 9).
(The depth direction of the paper).

The coupler connecting optical fiber 60a is J
It is also possible to terminate with a so-called MT connector (Mechanical Tranferable) defined in ISC5981. In this case, similarly, connection with a line side optical fiber or a transmission device side optical fiber terminated by the MT connector is also possible. Can be easily handled. Further, as an optical fiber for coupler connection to be connected to a multi-core optical fiber, for example,
Only one end connected by 1a has a multi-core structure and the other portion has a single-core structure. In this case, the multi-core / single-core branch portion 61d (see FIG. 9) is housed in the connection module 61 or the coupler module 60.

Next, an optical distribution board 70 according to a second embodiment of the present invention will be described.
Will be described with reference to FIG. 10 and FIG. As shown in FIG. 10, this optical distribution board 70 is a device-side termination in which one or a plurality of device-side termination units 72 to which the device-side optical fibers 35 pulled out from the transmission device-side cable 34 are connected are housed. Part 73 and the line side optical cables 24 and 25
A line-side termination unit 75 in which one or a plurality of line-side termination units 74 to which the optical fibers 28 and 31 drawn from the line are connected is housed, and an optical fiber selection device 58 of the line monitoring device
And a coupler unit 76 connected to the frame 77. The device-side termination 73 is provided above the frame 77, and the line-side termination 75 is provided at the center of the frame 77. One or more coupler units 76 are housed in the lower part of the frame 77.

The device-side termination unit 72 has the same configuration as the termination unit 38 of the optical distribution board 20 of the first embodiment.
An adapter panel 78 to which a plug-terminated end of the device-side optical fiber 35 is connected is provided. The device-side optical fiber 35 and a switching device inserted into the adapter panel 78 from the opposite side to the device-side optical fiber 35. Optical fiber 71a
(Jumper code) and switchable connection. The line-side termination unit 74 has the same configuration as the termination unit 29 of the optical distribution board 20 of the first embodiment, and switches the optical fibers 28 and 31 appropriately terminated with a switching optical fiber 71b via an adapter panel 79. (Jumper code) Connectable to switch. The configuration of the termination units 72 and 74 can be changed as appropriate depending on whether or not the device-side optical fiber 35 and the optical fibers 28 and 31 are terminated.

The coupler unit 76 has the same configuration as the coupler unit 54 of the optical distribution board 20 of the first embodiment, and is connected to the switching optical fibers 71a, 71b by being connected to the switching optical fibers 71a, 71b. Such an optical line (device-side optical fiber 35, optical fibers 28, 31, etc.)
And the optical fiber selecting device 58 can be connected.
In some cases, the device-side optical fiber 35 and the line-side optical fibers 28 and 31 may be directly drawn into the coupler unit 76, and if necessary, may be plugged and connected to be switchable. As shown in FIGS. 7 to 9,
The coupler unit 76 includes the coupler module 5 to be incorporated.
By appropriately selecting 5, 59 and 60, connection becomes possible in accordance with the presence or absence of the plug termination of the optical fiber.

FIG. 11 is a conceptual diagram showing the optical wiring in the optical wiring board 70. As shown in FIG.
At 0, in order to connect the target device-side optical fiber 35 to the line-side optical fiber 28 or 31 and to monitor the line of the connected optical fiber, the device-side termination 73 is used. Optical connector adapter 78a Switching optical fiber 71a connected to target device-side optical fiber 35, and switching optical fiber 71a connected to target line-side optical fiber 28 or 31 via optical connector adapter 79a at line-side termination 75. The optical fiber 71b is connected via a plurality of coupler modules 76a (see FIG. 10) arranged side by side in the coupler unit 76. As a result, as shown in FIG. 11, both the optical line of the line-side optical fiber 28 or 31 and the optical line of the device-side optical fiber 35 are connected to the optical fiber of the line monitoring device via the optical coupler built in the coupler module 76a. It is also connected to the selection device 58 and can monitor the track. Here, the switching optical fibers 71a, 71b are connected by the terminal ends 73, 75 and the coupler unit 76 on the device side and the line side.
Switch connection, the connection between the optical fiber 28 or 31 and the apparatus side optical fiber 35 can be easily switched.
There is no need to move 1 or the device side optical fiber 35.

When connecting the optical fiber 28 or 31 and the device side optical fiber 35 without monitoring the line, the device side,
Optical connector adapter 78 of the line-side terminations 73 and 75
The corresponding optical fibers 28, 31, and 35 are switchably connected to each other by a switching optical fiber 71c wired between a and 79a. Switching optical fibers 71a, 71b, 71c
Are terminated at both ends by the same optical connector plug. Therefore, in this optical distribution board 70, only the connection of the switching optical fibers 71a, 71b, 71c is switched, and the optical fibers 28, 31 and the device-side optical fiber The presence / absence of the line monitoring of the line 35 can be easily switched, and it is not necessary to move the optical fibers 28 and 31 and the device-side optical fiber 35 in the frame 77 during this operation. Also,
The switching optical fibers 71a, 71b, 71c
11 (right side in FIG. 11), the target switching optical fibers 71a, 71b, 71c can be easily taken out, the switching operation can be performed quickly, and the switching work frame 77 is provided. Optical fibers 28 and 31 wired on opposite sides of
It is possible to prevent the switching work of the switching optical fibers 71a, 71b, 71c from affecting the switching optical fibers 71a and 71b, and to obtain an effect that the switching work can be performed efficiently.

Hereinafter, the optical distribution board 80 of the third embodiment will be described with reference to FIG.
2 and FIG. In FIG.
In the optical distribution board 80, the optical fibers 28 and 31 drawn out from the line side optical cables 24 and 25 and the device side optical fiber 35 drawn out from the transmission device side code cable 34 are drawn in and connected to each other. A termination 81 is provided in the frame 82. In the termination part 81, a plurality of termination units 83 are accommodated vertically in multiple stages. The terminating unit 83 includes an adapter panel 84. The optical connector adapter 85 attached to the adapter panel 84 has the same optical fiber 31 as the plug-terminated one, and the same as the terminating unit 29 shown in FIG. Optical fiber 28 depending on the configuration
The end of the optical fiber for termination (not shown in FIG. 12) connected to the plug is terminated at the far side (cable side) in FIG.
From the front side (jumper side) of the drawing, while the device side optical fiber 35 and the switching optical fiber 8
7 (jumper cord) is connected so as to be switchable. A coupler unit 86 and an optical fiber selecting device 58 of a line monitoring device that monitors the optical line connected to the coupler unit 86 are disposed below the termination portion 81 in the frame 82. . The coupler unit 86 has the same configuration as the coupler unit 54 of the optical distribution board 20 of the first embodiment, and incorporates any one of the coupler modules shown in FIGS. 7 to 9.

FIG. 13 is a conceptual diagram showing the optical wiring in the optical wiring board 80. In FIG. 13, the optical fibers 28, 3
In order to connect the optical fiber 1 to the target device-side optical fiber 35 and perform line monitoring, the optical fiber 28 or 31
To the switching optical fiber 8 via the optical connector adapter 85.
7, and the device side optical fiber 35 is directly connected to the coupler module 86a. Coupler module 86a
Now, the switching optical fiber 87 via the built-in optical coupler
The optical fiber selecting device 58 is connected to the optical fibers 87 and 35 at the same time that the optical fiber 35 and the device side optical fiber 35 are connected. Thus, line monitoring of the optical fibers 28 and 31 and the device-side optical fiber 35 becomes possible. At this time, the terminating portion 81 functions as the line side terminating portion of the first aspect, and the coupler unit 86 also serves as the device side terminating portion of the first aspect. On the other hand, when the optical fibers 28 and 31 are connected to the target device-side optical fiber 35 and the line monitoring is not performed, the two are connected at the terminating section 81 via the optical connector adapter 85.

In order to switch the connection between the optical fiber 28 or 31 and the device-side optical fiber 35, when the line monitoring is not performed, the optical fiber 28 or 31 is switched.
It can be easily performed simply by switching and connecting the device side optical fiber 35 to the optical connector adapter 85. On the other hand, when line monitoring is performed, switching can be easily performed by switching and connecting the switching optical fiber 87 to the optical connector adapter 85 or the coupler module 86a. Fiber 3
There is no need to move 5. The switching optical fiber 87
The switching connection to the coupler module 86a includes switching between the coupler modules 86a and switching within the multi-core adapter unit attached to the coupler module 86a.

In the optical distribution board 80, one of the switching optical fiber 87 and the device-side optical fiber 35 is connected to the optical connector adapter 85 to connect to the line-side optical fibers 28 and 31. With only this, it is possible to easily switch the presence or absence of the line monitoring of the optical fibers 28 and 31 and the device-side optical fiber 35. That is, in order to release the line monitoring of the optical fiber 28 or 31 connected via the coupler module 86a and the apparatus side optical fiber 35 and to reconnect the apparatus, the switching optical fiber 87 is removed from the optical connector adapter 85 and the apparatus side optical fiber 85 is disconnected. The connection of the fiber 35 is performed from the coupler module 86a to the optical connector adapter 85.
In this case, the device-side optical fiber 35 can be connected to the target optical fiber 28 or 31, and the line monitoring by the optical fiber selecting device 58 can be easily released. Conversely, to monitor the line of the optical fiber 28 or 31 and the device-side optical fiber 35 connected without line monitoring via the optical connector adapter 85, the target device-side optical fiber 35 is removed from the optical connector adapter 85. While being connected to the coupler module 86a, the switching optical fiber 87 is connected to the optical connector adapter 85, and the optical fibers 28, 31 on the line side are connected to the coupler module 86a, thereby connecting with the optical line on the optical fiber 28 or 31 side. The device-side optical fiber 35 is connected to each other via a coupler module 86a.

As described above, the operation for switching the presence or absence of line monitoring is performed by the device-side optical fiber 35 and the switching optical fiber 87.
Can be performed only by the operation of
Since there is no need to move 1, high workability can be obtained.
Moreover, in the work, the switching optical fiber 87 and the device-side optical fiber 37 that are intensively wired on one side (the right side in FIG. 13) of the frame 82 may be handled, so that the switching connection workability is improved. Can be.

Further, while the conventional optical distribution board shown in FIG. 14 requires an additional optical fiber for connecting between the branch connection tray storage T2 and the coupler unit, the optical distribution board 80 is switchable. The presence or absence of line monitoring can be easily switched using only the optical fiber 87 and the device-side optical fiber 37, and the optical wiring in the frame 82 can be greatly reduced, so that space and cost can be saved. It is.
Further, since the optical connector adapter 85 can be mounted at a high density on the termination portion 81, the space can be saved, and the number of cores can be increased.

The present invention is not limited to the above-described embodiments. For example, the number and type of optical fibers 28 and 31
It goes without saying that the number of cores of the optical adapters employed in the coupler modules 55, 59, 60 can be changed as appropriate.

[0049]

As described above, according to the optical distribution board of the present invention, a connection is made between the line-side termination and the device-side termination, or to the optical fiber selection device connected to the line monitoring device. Switchable connection between the coupler module and the line-side termination or the device-side termination by a switching optical fiber, and by switching the connection of the switching optical fiber, the optical cable side connected to each other is connected. The line monitoring between the optical fiber and the optical fiber on the transmission device side can be switched. (A) The optical fiber on the optical cable side and the optical fiber on the transmission device side can be moved only by switching connection of the switching optical fiber. It is possible to easily switch the presence / absence of the line monitoring without performing, and to achieve an excellent effect that the workability of the switching work is improved.

According to a second aspect of the present invention, the coupler module is configured such that one or more of the optical fiber on the optical cable side, the optical fiber on the transmission device side, and the switching optical fiber are switchable. A pair of adapter parts to be connected, and a monitoring terminal connected to a connection terminal of the optical fiber selection device, wherein the optical fibers connected to both adapter parts are connected to each other via the optical coupler, and further a line monitoring device By adopting a configuration that is also connected to (b), simply switching the connection of the optical fiber to the adapter unit can easily switch the presence or absence of line monitoring for the optical fiber on the optical cable side and the optical fiber on the transmission device side. (C) By switching connection of the optical fiber to the adapter part, the optical fiber on the optical cable side and the transmission device side Can also be easily performed to switch connection between the optical fibers, an excellent effect such as workability switch connection is improved.

According to a third aspect of the present invention, an optical fiber on the optical cable side or an optical fiber on the transmission device side, which is not terminated so as to be connectable to a connector, and an optical fiber for coupler connection connected to the coupler module are connected. When a configuration in which a connection module for accommodating the optical connection unit is incorporated in the coupler unit is adopted, (d) the optical fiber on the optical cable side or the optical fiber on the transmission device side is simply connected to the optical fiber for coupler connection. Optical fiber can be easily connected to coupler module. (E)
The extra length generated by the optical connection and connection can be stored compactly by the connection module, and the volume in the frame can be effectively used. Simply by connecting the optical fiber on the device side to the coupler connection optical fiber with the connection module, these optical fibers can be connected to the coupler module, so they are terminated via the fusion tray or branch connection tray. Compared to the conventional example, the volume in the frame can be used more effectively, and the number of cores can be increased. The connection modules (g) and (f) correspond to optical fibers that are not terminated with connectors as necessary. Just select the presence or absence of this connection module for each optical fiber to be connected to the coupler unit. Excellent effects such may be connected to a rate well coupler module.

[Brief description of the drawings]

FIG. 1 is an overall front view showing a first embodiment of an optical wiring board of the present invention.

FIG. 2 is a conceptual diagram showing optical wiring in the optical wiring board of FIG. 1;

FIG. 3 is a perspective view showing a termination unit of a device-side termination portion applied to the optical wiring board of FIG. 1;

FIG. 4 is a perspective view showing a termination unit at a line-side termination applied to the optical wiring board of FIG. 1;

FIG. 5 is a side view showing the operation of the termination unit of FIG. 4;

FIG. 6 is a plan view showing a connection module of the termination unit of FIG. 4;

FIG. 7 is a side view showing a coupler module applied to the coupler unit of the optical distribution board shown in FIG. 1, and showing a coupler module having adapter parts on both sides.

8 is a diagram showing a coupler module applied to the coupler unit of the optical wiring board of FIG. 1, and is a side view showing a coupler module used in combination with a connection module.

9 is a diagram showing a coupler module applied to the coupler unit of the optical distribution board in FIG. 1, and is a side view showing a coupler module having an optical fiber for coupler connection which is not plug-terminated.

FIG. 10 is a front view showing an optical distribution board according to a second embodiment of the present invention.

FIG. 11 is a conceptual diagram showing optical wiring in the optical wiring board of FIG. 2;

FIG. 12 is a front view showing an optical distribution board according to a third embodiment of the present invention.

FIG. 13 is a conceptual diagram showing optical wiring in the optical wiring board of FIG.

FIG. 14 is a front view showing a conventional optical wiring board.

FIG. 15 is a view showing a conventional optical distribution board, and is a front view showing an optical distribution board composed of three frames.

[Explanation of symbols]

Reference numeral 20: optical wiring board, 21: frame (track side frame), 21a ...
Line-side termination, 23: frame (device-side frame), 23a: device-side termination, 24: optical cable, 25: optical cable (cable with connector), 28: optical fiber (line-side optical cord), 31 ... optical fiber (line-side optical cord), 33,
33a, 33b, 33c: switching optical fiber (jumper code), 35: transmission device side optical fiber (device side optical code), 54: coupler unit, 55: coupler module, 56: adapter unit, 57: connection terminal, 55a: monitoring terminal, 58: optical fiber selecting device, 59: coupler module, 59a: coupler connecting optical fiber, 59c: monitoring terminal, 60: coupler module, 60a: coupler connecting optical fiber, 60c: monitoring terminal , 61: connection module, 70: optical distribution board, 71a, 71b, 71c: switching optical fiber (jumper cord), 73: device-side termination, 75: line-side termination, 76: coupler unit, 76
a: coupler module, 77: frame, 80: optical distribution board,
81: line side termination (termination), 82: frame, 86: coupler unit, 86a: coupler module, 87: switching optical fiber (jumper cord).

Claims (3)

[Claims] An optical fiber (28, 31) drawn from an optical cable (24, 25) is connected to a switching optical fiber (3).
3, 71a, 71b, 71c, 87) and a line-side termination (21a, 75, 81) that is switchably connected to an optical fiber (35) on the transmission device side with the switching optical fiber. The device-side termination portions (23a, 73,
86) and an optical fiber selection device for connecting the optical fiber on the optical cable side, the optical fiber on the transmission device side, and the switching optical fiber to a line monitoring device that monitors an optical line by an optical pulse via a built-in optical coupler. (58) one or more coupler modules (55, 5
9, 60, 76a, and 86a) and a coupler unit (54, 76, 86).
2) The coupler module is configured so that any two selected from the optical fiber on the optical cable side, the optical fiber on the transmission device side, and the switching optical fiber can be switched and connected via the optical coupler. An optical distribution board (20, 70, 80) characterized in that: 2. An optical fiber on the optical cable side, an optical fiber on the transmission device side, and / or a plurality of switching optical fibers are connected to the coupler module (55) by a connector so as to be switchable. A pair of adapter portions (56) and connection terminals (5
7) a monitoring terminal (55a) connected to the adapter unit, wherein the optical fibers connected to both adapter units are connected via the optical coupler, and further connected to a line monitoring device. The optical distribution board according to claim 1, wherein 3. An optical connection in which an optical fiber on the side of the optical cable or an optical fiber on the side of the transmission device, which is not terminated so as to be connectable to a connector, and an optical fiber for coupler connection (60a) connected to the coupler module are connected. Department (6
3. The optical distribution frame according to claim 1, wherein a connection module for accommodating 1a) is incorporated in the coupler unit.