Adjustment system

Abstract

A control device 50 and an adjustment device 10 provided to an adjustment system 1 communicate with each other through a transmission path 2 formed of an optical fiber comprising a plurality of core wires. The control device 50 is provided with a termination unit 51 that multiplexes a test light to an optical signal transmitted by one core wire of the plurality of core wires, and a communication unit 53 that transmits the line number of the core wire to which the test light is multiplexed to the adjustment device 10. The adjustment device 10 comprises: a communication unit 18 that receives the line number of the core wire to which test light is multiplexed from the control device 50; a monitoring unit 11 that monitors an optical signal transmitted by each core wire of the transmission path 2, and identifies a port number of the core wire in which the test light is detected when the test light is sensed; and a controller 16 that refers to line number data for associating a line number for identifying the core wire of the optical fiber with a port number of the monitoring unit 11 connected to the core wire, and confirms coincidence between the line number identified from the port number identified by the monitoring unit 11 and the line number received by the communication unit.

Description

Adjustment System

[0001] The present disclosure relates to a regulation system.

[0002] In the construction and maintenance of optical fiber networks, particularly access networks that connect telecommunications carriers and optical nodes (optical terminals), optical fiber connections are frequently performed. Optical fiber connections involve connecting optical fiber cables along a route, one fiber at a time or one ribbon fiber at a time. Optical fiber connections are generally performed by a technician visiting the site and visually identifying the fibers to be connected.

[0003] Non-Patent Document 1 discloses the use of colored optical fibers or colored tape to manage the numbers of optical fiber cores. An operator visually identifies the color information previously applied to the optical fiber, compares it with a predetermined wire numbering rule, identifies the optical fiber cores to be spliced, and splices them.

[0004] NTT, "Ultra-thin, high-density optical cable technology enabling efficient construction of access networks," NTT Technical Journal, December 2012

[0005] However, connecting cables manually is a significant burden, requiring training to familiarize the operators with the wire numbering rules, increasing the number of steps required for visual identification, testing to ensure that the operators have normal color vision, and manufacturing costs for coloring the cables. Furthermore, checking the core wires connected by the operators and correcting any errors also requires a significant burden.

[0006] The present disclosure has been made in consideration of the above circumstances, and an object of the present disclosure is to provide a technology that can reduce the burden associated with connections in an optical fiber network.

[0007] An adjustment system according to one aspect of the present disclosure includes a control device and an adjustment device, wherein the control device and the adjustment device communicate via a transmission path formed of an optical fiber having a plurality of core wires and a control path for transmitting control signals, and the control device includes a termination unit that multiplexes test light into an optical signal transmitted through one of the plurality of core wires, and a communication unit that transmits the wire number of the core wire into which the test light is multiplexed to the adjustment device, and the adjustment device includes a communication unit that receives from the control device the wire number of the core wire into which the test light is multiplexed, a monitoring unit that monitors the optical signals transmitted through each core wire of the transmission path and, upon detecting the test light, identifies the port number of the core wire where the test light is detected, and a controller that references wire number data that associates wire numbers that identify core wires of the optical fiber with port numbers of the monitoring unit that are connected to the core wires, and confirms that the wire number identified from the port number identified by the monitoring unit matches the wire number received by the communication unit.

[0008] According to the present disclosure, it is possible to provide a technology that can reduce the burden associated with connecting an optical fiber network.

[0009] FIG. 1 is a diagram illustrating the system configuration of an adjustment system according to the present disclosure. FIG. 2 is a diagram illustrating the functions of a control device and an adjustment device according to the present disclosure. FIG. 3 is a diagram illustrating an example of the data structure of wire number data in the control device and the data. FIG. 4 is a diagram illustrating an example of the data structure of wire number data held by the adjustment device and the data. FIG. 5 is a sequence diagram illustrating processing in the adjustment system. FIG. 6 is a diagram illustrating the system configuration of an adjustment system according to a modified example. FIG. 7 is a diagram illustrating the functions of a control device and an adjustment device according to a modified example. FIG. 8 is a diagram illustrating the hardware configuration of a computer used in the estimation device or the adjustment device.

[0010] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In the description of the drawings, the same parts are designated by the same reference numerals and the description thereof will be omitted.

[0011] 1 , an adjustment system 1 according to the present disclosure includes a first adjustment device 10, a second adjustment device 20, a third adjustment device 30, a fourth adjustment device 40, a control device 50, and a transmission device 60. In the present disclosure, a case will be described in which the adjustment system 1 includes four adjustment devices, but the number of adjustment devices may be one or more. Any one adjustment device among the first adjustment device 10, the second adjustment device 20, the third adjustment device 30, and the fourth adjustment device 40 may be referred to as the adjustment device 10.

[0012] The control device 50, the first adjustment device 10, the second adjustment device 20, the third adjustment device 30 and the fourth adjustment device 40 are connected to each other via a transmission path 2 and a control path 3 so as to be able to communicate with each other.

[0013] The transmission path 2 provides optical communication services to user terminals connected to each adjustment device 10. The transmission path 2 is formed of an optical fiber having multiple core wires. The transmission path 2 is formed of a single-mode optical fiber used in FTTH (Fiber To The Home) services, etc. When an optical signal is transmitted from the control device 50 to the transmission path 2, the optical signal arrives at the first adjustment device 10, the second adjustment device 20, the third adjustment device 30, and the fourth adjustment device 40 in this order.

[0014] The control path 3 transmits and receives control signals for providing optical communication services bidirectionally between the control device 50, the first adjustment device 10, the second adjustment device 20, the third adjustment device 30, and the fourth adjustment device 40. The control path 3 is connected by wire or wirelessly. For the stability of the adjustment system 1, the control path 3 is connected so that two systems can communicate with each other.

[0015] The control path 3 may be formed of an optical fiber having one or more core wires. In this case, the adjustment device 10 may be supplied with power by optical power supply using the optical fiber.

[0016] The control device 50 relays communications between the transmission device 60 and user terminals that use optical communication services. The control device 50 sends optical signals received from the transmission device 60 to the transmission path 2, and sends optical signals received from the transmission path 2 to the transmission device 60. When the control device 50 and the transmission device 60 transmit and receive electrical signals, the control device 50 converts the electrical signals into optical signals and converts the optical signals into electrical signals.

[0017] In the present disclosure, the control device 50 further multiplexes test light onto each core wire of the transmission path 2 in order to reduce the burden associated with connecting optical fibers in the transmission path 2, and stores information on the wire numbers connected to each port in the control device 50 and each adjustment device 10.

[0018] The adjustment device 10 detects the test light multiplexed by the control device 50 and stores information on the wire number connected to each port of the adjustment device 10. Furthermore, it is preferable that the power of the adjustment device 10 be supplied by two systems. For example, the adjustment device 10 is preferably configured to be able to supply power by multiple systems for the stability of the adjustment system 1. The adjustment device 10 employs two or more power supply methods according to the installation environment of the adjustment device 10, such as commercial power, power generation using natural energy such as wind power or solar power, or optical power supply from the control path 3 when the control path 3 is formed of optical fiber. The functions of the adjustment device 10 may be implemented in a so-called optical node.

[0019] 2, the control device 50 includes a termination unit 51, a test device 52, a communication unit 53, a power transmission unit 54, a control unit 55, and wire number data 56. The communication unit 53, the control unit 55, and the wire number data 56 may be implemented in a general computer. Note that the numbers 1-4 assigned to the core wires in the transmission path 2 in FIG. 2 are the wire numbers of each core wire.

[0020] In the present disclosure, a case will be described in which the first adjustment device 10 checks whether each optical fiber is connected according to the wire number data 56. The connection status of the optical fibers is checked in the order in which the optical signal travels. Specifically, after the first adjustment device 10 checks that each optical fiber is connected according to the wire number data 56, the second adjustment device 20, the third adjustment device 30, and the fourth adjustment device 40 check the connection status in this order.

[0021] The termination 51 is provided on the path of the transmission line 2. The termination 51 multiplexes test light with an optical signal transmitted through one of the multiple core wires and sends the multiplexed signal to the transmission line 2. The test light is used in the adjustment device 10 to check whether each optical fiber is connected according to the line number data 56.

[0022] The test device 52 follows instructions from the control unit 55 and sends out test light to an optical fiber having a wire number specified by the control unit 55 .

[0023] The communication unit 53 is an interface for communicating with the adjustment device 10. In accordance with instructions from the control unit 55, the communication unit 53 transmits the wire number of the core wire into which the test light is multiplexed to the adjustment device 10, or notifies the adjustment device 10 of the wire number into which the test light is multiplexed. In accordance with instructions from the control unit 55, the communication unit 53 transmits the part of the wire number data related to each adjustment device 10 to that adjustment device 10. The control device 50 and each adjustment device 10 share the data related to the corresponding adjustment device 10 in the wire number data 56.

[0024] The power transmitting unit 54 transmits power to the adjustment device 10 in accordance with the specifications of the adjustment system 1. For example, when the control path 3 is formed of an optical fiber, the power transmitting unit 54 transmits power supply light to the adjustment device 10 and transmits power to the adjustment device 10. The power transmitting unit 54 may be provided inside the control device 50 or outside the control device 50. The power transmitting unit 54 may be provided separately in each of the control device 50 and the adjustment device 10.

[0025] The control unit 55 controls the transmission of test light to the adjustment device 10, etc. The control unit 55 instructs the test device 52 to send test light to the wire number to be tested. The control unit 55 transmits the wire number to be tested to the adjustment device 10. The control unit 55 also inputs an instruction to the communication unit 53 to share with each adjustment device 10 the data portion of the wire number data 56 that is related to that adjustment device 10.

[0026] The wire number data 56 is data relating to the wire numbers of optical fibers in the control device 50 and each adjustment device 10. As shown in Fig. 3, the wire number data 56 associates, in the control device 50, the wire number that identifies the core wire of the optical fiber with the port number of the termination unit 51 that is connected to the core wire. In each adjustment device 10, the wire number data 56 associates, in the control device 50, the wire number that identifies the core wire of the optical fiber with the port number of the monitoring unit 11 that is connected to the core wire.

[0027] The wire number data 56 is a master for wire number management in the adjustment device 10. The connection status of optical fibers in the adjustment system 1 is in accordance with the wire number data 56.

[0028] (Adjustment Device) The first adjustment device 10 will be described with reference to Fig. 2. The second adjustment device 20, the third adjustment device 30, and the fourth adjustment device 40 have the same functions as the first adjustment device 10.

[0029] The adjustment device 10 includes a monitoring unit 11, an adjustment unit 12, an accommodation unit 13, a controller 16, a power receiving unit 17, and a communication unit 18. In the adjustment device 10, the monitoring unit 11, the adjustment unit 12, and the accommodation unit 13 are provided on the path of the transmission line 2.

[0030] The monitoring unit 11 receives an optical signal transmitted from the control device 50 or an optical signal multiplexed with test light. In FIG. 2, the monitoring unit 11 has four ports. The four ports are given port numbers 1 to 4, starting from the top of FIG. 2. The monitoring unit 11 may be formed, for example, by a WDM (Wavelength Division Multiplexing) optical coupler that demultiplexes the wavelengths of the test light, and a photodetector (PD) that detects the demultiplexed light.

[0031] The monitoring unit 11 monitors the optical signals transmitted through each core wire of the transmission path 2, and when it detects test light, it identifies the port number of the core wire where the test light was detected. The monitoring unit 11 detects the test light by splitting and receiving the test light at each port. The monitoring unit 11 notifies the controller of the port number of the port where the test light was detected.

[0032] The adjustment unit 12 receives the optical signal output by the monitoring unit 11. The adjustment unit 12 has input ports connected to the ports on the monitoring unit 11 side, and output ports connected to the ports on the accommodating unit 13 side. In the present disclosure, the adjustment unit 12 has four input ports and four output ports. The four input ports and four output ports are assigned port numbers 1 to 4, respectively, from the top of FIG. 2 .

[0033] The adjusting unit 12 has an optical cross-connect function, and in order to realize the optical cross-connect function, the adjusting unit 12 is formed by a MEMS (Micro Electro Mechanical Systems) switch, a thermo-optical optical switch, or the like.

[0034] The adjustment unit 12 changes the correspondence between the wire numbers and the port numbers by outputting the optical signals input from each input port to one of the four output ports. Specifically, in the adjustment unit 12, one input port inputs the optical signal input from the monitoring unit 11 to an output port specified by the controller 16. For example, there may be a case where the correspondence between the wire numbers and the port numbers in the adjustment device 10 does not match the wire number data 56 due to an error in the connection of the core wires between the control device 50 and the adjustment device 10. In such a case, the adjustment unit 12 can correct the error in the connection of the core wires by switching the port to which the core wires are connected so that the connection matches the wire number data 56.

[0035] The accommodating unit 13 receives the optical signal output by the adjusting unit 12. In the present disclosure, the accommodating unit 13 has four ports connected to port numbers 1 to 4 of the output side ports of the adjusting unit 12. The accommodating unit 13 outputs the optical signal received from the adjusting unit 12 to the second adjusting device 20. The accommodating unit 13 may output the optical signal to a device other than the second adjusting device via another optical fiber (not shown).

[0036] The power receiving unit 17 receives power supplied from a power transmitting unit 54 provided in the control device 50, etc. The power receiving unit 17 supplies power to each unit in the adjustment device 10, thereby driving the adjustment device 10.

[0037] The communication unit 18 receives the wire number of the core wire into which the test light is multiplexed from the control device 50. The communication unit 18 notifies the controller 16 of the received wire number. The communication unit 18 also receives wire number data related to the adjustment device 10 from the control device 50 and stores the data in a storage device that can be referenced by the controller 16.

[0038] The controller 16 controls the adjustment device 10. The controller 16 refers to wire number data related to the adjustment device 10. As shown in Fig. 4, the wire number data related to the adjustment device 10 associates wire numbers that identify the core wires of optical fibers with port numbers of the monitoring unit 11 that are connected to the core wires in the adjustment device 10. The wire number data related to the adjustment device 10 may be stored in a storage device of the adjustment device 10, or may be stored in an external storage device that can be referenced by the controller 16.

[0039] The controller 16 confirms whether the wire number identified from the port number identified by the monitoring unit 11 matches the wire number received by the communication unit 18. For example, if the control device 50 multiplexes test light onto wire number 1, the monitoring unit 11 detects the test light at port 1, and the wire number data associates port 1 with wire number 1, the controller 16 confirms that the core wire of wire number 1 is correctly connected between the control device 50 and the adjustment device 10.

[0040] If the wire number identified by referring to the wire number data from the port number identified by the monitoring unit 11 as having detected the test light does not match the wire number received by the communication unit 18 from the control device 50 as having multiplexed the test light, the controller 16 instructs the adjustment unit 12 to switch the output destination of the optical signal of a predetermined input port. The controller 16 transmits an instruction to the adjustment unit 12 to specify the output destination of the input port connected to the port number identified by the monitoring unit 11 as the output port corresponding to the port number received by the communication unit 18.

[0041] For example, consider a case where the control device 50 holds the wire number data 56 shown in Fig. 3 in the connection state shown in Fig. 2. In the wire number data 56, in the first adjustment device 10, the core wire of wire number 1 is connected to the port of port number 1 of the monitoring unit 11. The core wire of wire number 2 is connected to the port of port number 2 of the monitoring unit 11. The core wire of wire number 3 is connected to the port of port number 3 of the monitoring unit 11. The core wire of wire number 4 is connected to the port of port number 4 of the monitoring unit 11.

[0042] 2, the core wire of wire number 1 is connected to the port of port number 4 of the monitoring unit 11. The core wire of wire number 2 is connected to the port of port number 3 of the monitoring unit 11. The core wire of wire number 3 is connected to the port of port number 1 of the monitoring unit 11. The core wire of wire number 4 is connected to the port of port number 2 of the monitoring unit 11.

[0043] In the control device 50, when test light is multiplexed onto wire number 1, the monitoring unit 11 of the adjustment device 10 detects the test light at port number 1 connected to wire number 1 according to the wire number data 56. However, in the case of the connection shown in FIG. 2, the monitoring unit 11 detects the test light at port number 4.

[0044] Therefore, the controller 16 instructs the connection of the core wire of the input port with port number 4 on the input side to the port with port number 1 on the output side, as specified by the wire number data 56. When the same process is repeated for each core wire, each input port and each output port are connected, as shown by the solid lines in the adjustment unit 12 in Figure 2. This allows the controller 16 to detect and correct any errors in the connection of the core wires between the control device 50 and the adjustment device 10.

[0045] The processing of the adjustment system 1 according to the present disclosure will be described with reference to FIG.

[0046] In step S1, the control device 50 transmits test light from the line number n to the first adjustment device 10. In step S2, the control device 50 notifies the first adjustment device 10 of the line number n from which the test light has been transmitted.

[0047] In step S3, the first adjustment device 10 identifies the port number at which the test light was detected by the monitoring unit 11. In step S4, the first adjustment device 10 refers to the wire number data and identifies the wire number X corresponding to the port number identified in step S3.

[0048] In step S5, the first adjustment device 10 determines whether the wire number X identified in step S4 matches the wire number n notified in step S2. If they match, the adjustment system 1 can confirm that the core wire of the wire number being tested is correctly connected between the control device 50 and the first adjustment device 10. If they do not match, in step S6, the first adjustment device 10 adjusts the connection destination of the core wire in the adjustment unit 12 so that the wire number X becomes the wire number n.

[0049] The processing shown in Fig. 5 is executed for each core wire connecting the control device 50 and the first adjustment device 10. Furthermore, when it is confirmed that each core wire under test is correctly connected between the control device 50 and the first adjustment device 10, the processing of Fig. 5 is executed for each core wire between the control device 50 and the second adjustment device 20. When the processing of Fig. 5 is executed for each core wire between the control device 50 and the third adjustment device 30 and between the control device 50 and the fourth adjustment device 40, the adjustment system 1 can confirm that each core wire is connected in accordance with the wire number data 56.

[0050] Even if the core wires are erroneously connected in accordance with the wire number data 56 when connecting the control device 50 and the adjustment device 10, the adjustment system 1 can correct the connection of the core wires as defined by the wire number data 56. Note that, although the present disclosure describes a case in which the connection destination of the core wires is adjusted based on the wire number data shared with the control device 50, this is not limiting. For example, the adjustment device 10 may store log data of core wire switching instructions issued by the adjustment unit 12, and adjust the connection destination of the core wire based on the connection state at a predetermined timing.

[0051] After an operator connects the control device 50 and the adjustment device 10, the adjustment system 1 can check the accuracy of the connection and switch to the correct connection if there is an error. The adjustment system 1 can reduce the burden on connections in an optical fiber network.

[0052] (Modification) An adjustment system 1a according to a modification will be described with reference to Fig. 5. The adjustment system 1a according to the modification is different from the adjustment system 1 shown in Fig. 1 in that the optical fiber transmission path 2a is formed in a loop shape, running from the control device 50a, via each adjustment device 10a, and returning to the control device 50a.

[0053] The transmission path 2a transmits an optical signal in both a clockwise and counterclockwise direction, so in this modified example, the control device 50a needs to transmit the test light in both the clockwise and counterclockwise directions.

[0054] 7, in the control device 50a according to the modified example, the terminal 51 includes a first terminal 51a that multiplexes the test light onto an optical signal transmitted via a clockwise path, and a second terminal 51b that multiplexes the test light onto an optical signal transmitted via a counterclockwise path. The first terminal 51a is provided on the first adjustment device 10a side. The second terminal 51b is provided on the fourth adjustment device 40a side.

[0055] As shown in Figure 7, the first adjustment device 10a arranges, on the transmission path 2a, in order from the control device 50a side, a first monitoring unit 11a, a first adjustment unit 12a, a storage unit 13a, a second adjustment unit 12b, and a second monitoring unit 11b.

[0056] The monitoring unit 11 includes a first monitoring unit 11a that monitors optical signals transmitted on a clockwise path and a second monitoring unit 11b that monitors optical signals transmitted on a counterclockwise path. The first monitoring unit 11a is provided on the control device 50a side. The second monitoring unit 11b is provided on the second adjustment device 20a side.

[0057] The adjusting unit 12 includes a first adjusting unit 12a that adjusts the destination of an optical signal transmitted via a clockwise path and a second adjusting unit 12b that adjusts the destination of an optical signal transmitted via a counterclockwise path. The first adjusting unit 12a is provided between the first monitoring unit 11a and the accommodating unit 13a. The second adjusting unit 12b is provided between the second monitoring unit 11b and the accommodating unit 13a.

[0058] In a modified example, the communication unit 53 of the control device 50a may notify the adjustment device 10 of the wire number onto which the test light is multiplexed, as well as its direction. For example, when the first terminal 51a multiplexes onto wire number 1, it transmits to the first adjustment device 10a a signal indicating that the test wave has been multiplexed onto wire number 1 in a clockwise direction. In this case, the first monitoring unit 11a detects the test wave. When the second terminal 51b multiplexes onto wire number 1, it transmits to the fourth adjustment device 40a a signal indicating that the test wave has been multiplexed onto wire number 1 in a counterclockwise direction. In this case, a monitoring unit (not shown) of the fourth adjustment device 40a that detects counterclockwise test light detects the test light.

[0059] In a modified example, even if the transmission path 2a is formed in a loop and optical communication services are provided in both clockwise and counterclockwise directions, after an operator connects the control device 50a and the adjustment device 10a, the operator can check the accuracy of the connection and switch to the correct connection if there is an error. The adjustment system 1a can reduce the burden associated with connecting an optical fiber network.

[0060] The adjustment system 1a according to the modified example has been described as a case where the transmission line 2a is formed in a loop shape, but it may also be introduced in a case where it is not formed in a loop shape, as in FIG.

[0061] Each of the adjustment devices 10 and control devices 50 of the present embodiment described above uses, for example, a general-purpose computer system including a CPU (Central Processing Unit, processor) 901, a memory 902, a storage 903 (HDD: Hard Disk Drive, SSD: Solid State Drive), a communication device 904, an input device 905, and an output device 906. In this computer system, the CPU 901 executes a program loaded on the memory 902, thereby realizing the respective functions of each adjustment device 10 and control device 50.

[0062] Each of the adjustment devices 10 and the control devices 50 may be implemented by a single computer or by multiple computers. Furthermore, each of the adjustment devices 10 and the control devices 50 may be a virtual machine implemented on a computer.

[0063] The programs of the adjustment devices 10 and the control devices 50 can be stored in a computer-readable recording medium such as a HDD, SSD, USB (Universal Serial Bus) memory, CD (Compact Disc), DVD (Digital Versatile Disc), or can be distributed via a network. The computer-readable recording medium is, for example, a non-transitory recording medium.

[0064] The present disclosure is not limited to the above-described embodiments, and various modifications are possible within the scope of the present disclosure.

[0065] REFERENCE SIGNS LIST 1 Adjustment system 2 Transmission path 3 Control path 10 Adjustment device (first adjustment device) 11 Monitoring unit 12 Adjustment unit 13 Accommodation unit 16 Controller 17 Power receiving unit 18, 53 Communication unit 20 Second adjustment device 30 Third adjustment device 40 Fourth adjustment device 50 Control device 51 Termination unit 52 Test device 54 Power transmitting unit 55 Control unit 56 Wire number data 60 Transmission device 901 CPU 902 Memory 903 Storage 904 Communication device 905 Input device 906 Output device

Claims

1. An adjustment system comprising: a control device; and an adjustment device, wherein the control device and the adjustment device communicate via a transmission path formed of an optical fiber having a plurality of core wires and a control path for transmitting control signals, the control device comprising: a termination unit that multiplexes test light into an optical signal transmitted through one of the plurality of core wires, and a communication unit that transmits to the adjustment device the wire number of the core wire into which the test light is multiplexed, the adjustment device comprising: a communication unit that receives from the control device the wire number of the core wire into which the test light is multiplexed, a monitoring unit that monitors the optical signals transmitted through each core wire of the transmission path and, upon detecting the test light, identifies the port number of the core wire in which the test light is detected, and a controller that references wire number data that associates the wire number that identifies the core wire of the optical fiber with the port number of the monitoring unit that is connected to the core wire, and confirms that the wire number identified from the port number identified by the monitoring unit matches the wire number received by the communication unit.

2. The adjustment device further comprises an adjustment unit that receives the optical signal output by the monitoring unit, and an accommodating unit that receives the optical signal output by the adjustment unit, the adjustment unit having input ports connected to each port on the monitoring unit side, and output ports connected to each port on the accommodating unit side, one input port inputs the optical signal input from the monitoring unit to an output port specified by the controller, and if the line number identified from the port number identified by the monitoring unit does not match the line number received by the communication unit, the controller sends an instruction to the adjustment unit to specify the output destination of the input port connected to the port number identified by the monitoring unit to be the output port corresponding to the port number corresponding to the line number received by the communication unit. The adjustment system described in claim 1.

3. The adjustment system according to claim 1, wherein the control device and the adjustment device share data relating to the adjustment device among the wire number data.

4. The adjustment system described in claim 1, wherein the transmission path is formed so as to pass from the control device via the adjustment device and return to the control device, and transmits optical signals via both a clockwise path and a counterclockwise path; in the control device, the termination multiplexes the test light onto the optical signal transmitted via the clockwise path, and also multiplexes the test light onto the optical signal transmitted via the counterclockwise path; and in the adjustment device, the monitoring unit monitors the optical signal transmitted via the clockwise path, and also monitors the optical signal transmitted via the counterclockwise path.

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