JP2675366B2 - Optical fiber connection status monitoring system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Industrial field of application) The present invention relates to an optical device for monitoring the connection state of optical fibers constituting an optical communication line in order to efficiently maintain the optical communication line. The present invention relates to a fiber connection status monitoring system.

(Prior Art) As shown in FIG. 3, a conventional optical communication line is composed of a plurality of optical communication terminals 71 provided on a central office 87 side and optical fibers for wiring, each of which is connected through an optical connector 73. code
Optical fiber 75 via a pair of optical connectors 73 connected to the optical cord 75, further connected to the optical distribution frame 77 via the optical connector 73, and further connected to the opposite side of the optical distribution frame 77. Optical cable connected to the line 75a, and the optical fiber core line 75a
They are grouped as 79 and connected to the connection box 87, and the connection box 87
To the optical fiber 81 through the individual optical fiber cores 75a
And is connected to each optical communication terminal 83 via the optical connector 73 and the optical cord 75. In the connection box 87, each optical fiber core wire 75a constituting the optical cable 79 is connected to the optical fiber core wire 75a via a pair of optical connectors 73, 73 connected to each other. The core wires 75a are put together to form an optical cable 81.

Further, in the optical communication line of FIG. 3 described above, an optical pulse tester 89 is provided on the central office side in preparation for a line failure test. The optical pulse tester 89 distributes light via the optical cord 75. It is connected to an optical connector 73 connected to the rack 77, and a pair of optical connectors 73 is further connected from the optical connector 73 via the optical distribution rack 77.
From the optical connector 73 to the optical fiber 75
The optical cable 79 can be put together via a and connected to the optical communication line.

In the conventional optical communication line configured as described above,
For example, if there is a line failure and communication is cut off,
The optical pulse tester 89 is connected to the optical communication line as described above, the disconnection position is measured, and the connection status is traced by relying on the wire number table recorded at the time of line construction, and the disconnection core wire in the optical cable is used. The number is identified, and an empty core wire, that is, an unused core wire is similarly detected from the wire number table to perform connection replacement and repair.

(Problems to be Solved by the Invention) In the above-mentioned conventional optical communication line, when a failure occurs, the wire number table is used to identify the disconnection core wire number in the optical cable and detect the unused core wire as described above. Therefore, if there is a mistake in the wire number table or a computer input error, or if wiring is changed due to separate work immediately before the occurrence of a failure, the changed state is not entered in the wire number table or not entered in the computer. In the case of, there may be a significant hindrance to disaster recovery.

The present invention has been made in view of the above, and an object of the present invention is to provide an optical signal capable of promptly grasping a connection state of an optical line in real time so that maintenance work for a line failure or the like can be performed appropriately and promptly. It is to provide a fiber connection state monitoring system.

[Means for Solving the Problems] (Means for Solving the Problems) In order to achieve the above object, an optical fiber connection state monitoring system according to the present invention includes a plurality of optical fibers forming an optical cable via an optical connector in an optical distribution rack. An optical fiber connection state monitoring system for monitoring a line state of optical communication lines configured to be optically connected to each other, including connection information of optical fibers provided in the optical connector and connected to the optical connector. Storage means for storing line connection information, a connection terminal provided in the optical connector for reading the line connection information stored in the storage means from the outside of the optical connector, and the optical connection via the optical distribution rack. An information reading unit that is connected to the connection terminal of the connector and reads the line connection information stored in the storage unit through the connection terminal. And effect.

(Operation) In the optical fiber connection state monitoring system of the present invention, a storage unit for storing the line connection information is provided in the optical connector for connecting the optical fibers forming the optical communication line, and the line stored in the storage unit is provided. The connection information can be read from the optical distribution rack.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

1 (a) and 1 (b) respectively show the structure of a high-performance optical connector 1 used for connecting an optical cord made of an optical fiber in an optical fiber connection state monitoring system according to an embodiment of the present invention. It is a side view and a front view.

As shown in the side view of FIG. 1A, the optical connector 1 of FIG. 1 is connected to the end of the optical cord 3 and is covered with a housing 13.
Is provided. Further, the optical connector 1 is, as shown in the front view of FIG. 1B, a single-core optical fiber having an optical fiber terminal integrated in the center or an optical fiber tape or laminated tape composed of a plurality of optical fibers. The ferrule 7 is provided, a plurality of electrodes 9 are connected around the ferrule 7, and an insulator 11 is filled between the electrodes 9 and the ferrule 7 for insulation. The plurality of electrodes 9 are connected to the respective input / output terminals and the power supply terminal of the memory element 5, so that information can be stored in the memory element 5 and the stored information can be read out through these electrodes 9. ing. In the memory element 5, line connection information indicating connection information in the optical communication line of the optical connector 1 used in the optical communication line described later and the optical fiber to which the optical connector 1 is connected. To remember. In addition, the memory element 5 is, for example, a CM
When a low power consumption device such as OSIC is used, a small battery for backup of the memory element 5 can be incorporated in the housing 13.

FIG. 2 is a diagram showing a configuration in which an optical fiber connection state monitoring system according to an embodiment of the present invention using the optical connector 1 of FIG. 1 is applied to an optical communication line. The optical communication line shown in the figure includes the optical connector 1, the optical cord 3 for wiring, the optical branching device 17, the optical cord 3, and the optical connector from the plurality of optical communication terminals 15 provided on the telephone station 10 side, respectively. 1 is connected to the first light distribution rack 19 via
Is connected to the optical fiber core wire 3a from the pair of optical connectors 1 connected to the opposite side of the optical fiber core wire 3a, and the optical fiber core wire 3a is collected as the first optical cable 21 and connected to the first connection box 23. The connection box 23 is further connected to the second connection box 27 via the second optical cable 25, and the connection box 27 is connected to the optical communication terminal 41 via the individual optical cords 3b and the optical connector 1. . The first connection box 23 has a second light distribution rack 29 to which a plurality of paired optical connectors 1 connected to each other are mounted, and a plurality of pairs of optical fibers mounted to the light distribution rack 29. One of the connectors 1 is connected to each of the optical fiber core wires 3a forming the first optical cable 21, and the other optical connector 1 is connected to each of the optical fiber core wires 3a forming the second optical cable 25. The second connection box 27 also has a third light distribution frame 39 having a similar structure.

A computer 43 is provided on the telephone station 10 side, and the computer 43 is connected to each optical communication terminal via an electric input / output circuit 45.
The optical pulse tester 47, the maintenance-only optical bidirectional communication device 49, and the electric input / output circuit 51 are connected to the optical pulse tester 47. Then, the computer 43 is connected to each optical branching device 17 from the optical pulse tester 47 via the optical switch 59, and from the maintenance dedicated optical bidirectional communication device 49 via the optical connector 1, the optical cord 3 and the optical connector 1. Connected to the first optical distribution rack 19 and the maintenance-dedicated optical fiber core wire forming the first optical cable 21 through the pair of optical connectors 1 connected to the opposite side of the first optical distribution rack 19. 3c, and further connected from the electric input / output circuit 51 to the first light distribution frame 19.

In addition, in the first connection box 23, the second light distribution rack 29
An electric input / output circuit 53 is connected to the electric input / output circuit 53, and an optical bidirectional communication device 55 for maintenance is connected to the electric input / output circuit 53. Also,
The maintenance-dedicated optical bidirectional communication device 55 includes a maintenance-dedicated optical fiber core wire 3d that constitutes the first optical cable 21 via the optical connector 1.
And a dedicated optical fiber core wire for maintenance that constitutes the second optical cable 25 via the optical connector 1 on the opposite side.
Connected to 3e.

Similarly, in the second connection box 27, an electric input / output circuit 53 is connected to the third optical distribution frame 39, and an optical bidirectional communication device 55 for maintenance is connected to the electric input / output circuit 53. Is
Further, the maintenance dedicated optical two-way communication device 55 is connected to the maintenance dedicated optical fiber core wire 3f forming the second optical cable 25 via the optical connector 1 and also to the third side via the optical connector 1 on the opposite side. The optical fiber 28 is connected to the maintenance-dedicated optical fiber core wire 3g.

The optical fiber connection state monitoring system configured as described above uses the optical connectors 1 each having the memory element 5 as shown in FIG. 1, but the optical connectors 1 are connected to the end portions of each optical cable. When configuring, line connection information such as the number of the optical cable to which the optical connector 1 is connected or the number of the optical connector 1 can be stored in the memory element 5 of each optical connector 1. When the electric input / output circuits 51 and 53 are connected to the memory element 5 of the optical connector 1 via the electrode 9 of the optical connector 1 storing the line connection information, the line connection information stored in the memory element 5 is read out. (Or write). Therefore, the line connection information such as the connector and cable information can be read without manually or manually inputting the connection information in the wire number table as in the conventional case. The memory element 5 may be replaced with a specific wiring of the connector for the electrode 9.

As described above, if the optical connector 1 is connected to each optical cable and line connection information such as the number of each optical cable or the number of the optical connector 1 is stored at the time of connection, the optical connector in the telephone station 10 1 and line connection information relating to the optical cord 3 or the optical fiber core wire 3a connected to the optical connector 1, the optical distribution frame 19 and the optical distribution frame 19 connected to the electrode 9 of the memory element 5 of the optical connector 1 It is read by the computer 43 via the electric input / output circuit 51 connected to the light distribution rack, and thereby the connection state of each optical connector 1 and the optical cable can be accurately identified in real time.

Further, if the user wants to also obtain the connection information stored in the optical connector 1 connected to the optical communication terminal 15 in the telephone station 10,
If a memory reading circuit is provided in the optical communication device terminal 15, the computer 43 can read the data through the electric input / output circuit 45 connected to the optical communication device terminal 15.

In addition, a connection box provided at a remote location away from the telephone station 10.
The connection information from the optical connector 1 provided in 23, 27 is obtained from the optical distribution rack 29, 39 provided in the connection box 23, 27, the electric input / output circuit 53, the maintenance dedicated optical bidirectional communication device 55 and the maintenance dedicated. Optical fiber cores 3d, 3c or maintenance-dedicated optical fiber cores 3f, 3e, 3
It can be read by the maintenance-only optical two-way communication device 49 in the telephone station 10 via d and 3c.

Therefore, in the above configuration, when a line fault occurs in the optical communication line, the optical switch 59 is switched and connected, and a pulse test of the fault line is performed from the computer 43 through the optical pulse tester 47. Electric input / output circuit 45,51,
It is possible to obtain the connection state of the optical communication line in real time via the 53 and the maintenance-only optical bidirectional communication devices 49, 55, etc., and perform quick processing for failure recovery with high reliability.

Also, if external electrodes are added to the maintenance dedicated optical two-way communication device 55 of the connection boxes 23 and 27, the worker who performs the construction connects the maintenance dedicated optical two-way communication device 55 with an external device to connect the connection state. 2
It is possible to inspect at 3,27 positions, which can further increase the certainty of the work.

Further, the computer 43 has a function of designating and calling the maintenance dedicated optical two-way communication device 55 of the arbitrary connection box 23, 27, and the optional optical connector 1 in the optical distribution rack 19, 29, 39, Specifically, the maintenance-dedicated optical bidirectional communication device 49 is designed so that one of the pair of optical connectors 1 connected to each other is designated and the connection information stored in the memory element 5 of the optical connector 1 is read. It also has the function of commanding 55.

[Effects of the Invention] As described above, according to the present invention, the storage means for storing line connection information is provided in the optical connector for connecting the optical fibers constituting the optical communication line, and is stored in the storage means. Since the line connection information can be read from the optical distribution rack, accurate line connection information can be obtained in real time. It is possible to certify the broken core wire and the unused core wire without fail, and it is possible to properly and swiftly perform the maintenance work in the event of a line failure.

[Brief description of the drawings]

1 (a) and 1 (b) are a side view and a plan view showing the structure of a high-performance optical connector used in an optical fiber connection state monitoring system according to an embodiment of the present invention, and FIG. FIG. 3 is a diagram showing a configuration in which an optical fiber connection state monitoring system according to an embodiment of the present invention using the optical connector of the figure is applied to an optical communication line, and FIG. 3 is a configuration diagram of a conventional optical communication line. 1 ... Optical connector 3 ... Optical cord 3a ... Optical fiber core wires 3c to 3g ... Maintenance wire optical fiber core wire 5 ... Memory element 15 ... Optical communication terminal 19,29,39 ... Optical distribution Frame 21,25 …… Optical cable 41 …… Optical communication terminal 43 …… Computer 45,51,53 …… Electrical input / output circuit 47 …… Optical pulse tester 49,55 …… Maintenance optical bidirectional communication 59… … Optical switch

Claims (1)

(57) [Claims] 1. An optical fiber connection state monitoring system for monitoring a line state of an optical communication line configured by optically connecting a plurality of optical fibers constituting an optical cable to each other through an optical connector in an optical distribution frame. Storage means for storing line connection information including connection information of optical fibers connected to the optical connector and line connection information provided in the optical connector and stored in the storage means. A connection terminal for reading out from the outside of the optical connector, and the line connection information connected to the connection terminal of the optical connector via the optical distribution rack and stored in the storage means via the connection terminal. An optical fiber connection state monitoring system, comprising: