Insertion / extraction structure, insertion / extraction method, optical transmission device, control method, and control program

Abstract

To provide an insertion / extraction structure, an insertion / extraction method, an optical transmission device, a control method, and a control program such that an optical transceiver can be inserted and extracted safely.SOLUTION: An insertion / extraction structure 1 of an optical transceiver comprises: an optical transmission device 10; an optical transceiver 20 which can be inserted into and extracted from a port 11 of the optical transmission device 10; and a cover 30 which covers an exposed part from the port 11 of the optical transceiver 20 inserted into the port, and the cover 30 which covers the optical transceiver 20 is fixed detachably to a fitting part 12 of the optical transmission device 10 with a fixation member 31.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present disclosure relates to an insertion / removal structure, an insertion / removal method, an optical transmission device, a control method, and a control program. [Background technology]

[0002] Optical transmission devices use optical transceivers that transmit and receive optical signals. Until now, optical transceivers fixed on the circuit board of optical transmission devices have been mainly used. In recent years, pluggable optical transceivers have become more common in optical transmission devices. For example, Patent Document 1 describes an optical transceiver that can be plugged in and out while the line is hot. Note that plugging in and out can refer to either insertion or removal, or both. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2017-092855 Summary of the Invention [Problem to be solved by the invention]

[0004] The optical transceiver described in Patent Document 1 is a hot-pluggable optical transceiver. However, optical transceivers that do not support hot-pluggable optical transceivers have also been developed. For example, it is desirable to be able to safely plug and unplug such optical transceivers.

[0005] In view of the above problems, one of the objects of the present disclosure is to provide an insertion / removal structure, an insertion / removal method, an optical transmission device, a control method, and a control program that enable safe insertion and removal of an optical transceiver. [Means for solving the problem]

[0006] An insertion / removal structure according to one aspect of the present disclosure comprises an optical transmission device, an optical transceiver that can be inserted into and removed from a port of the optical transmission device, and a cover that covers the exposed portion of the optical transceiver inserted into the port, and the cover that covers the optical transceiver is removably fixed to an attachment portion of the optical transmission device by a fixing member.

[0007] An insertion / removal method according to one aspect of the present disclosure involves inserting a removable optical transceiver into a port of an optical transmission device, covering the exposed portion of the optical transceiver inserted into the port with a cover, and removably fixing the cover covering the optical transceiver to the optical transmission device with a fixing member.

[0008] An optical transmission device according to one aspect of the present disclosure includes a port into which an optical transceiver can be inserted and removed, an attachment portion for removably fixing a cover that covers the exposed portion of the optical transceiver inserted into the port using a fixing member, a detection portion for detecting when removal of the fixing member from the attachment portion has begun, and a control portion for performing necessary processing before removing the optical transceiver based on the detection result.

[0009] A control method according to one aspect of the present disclosure detects that, when a cover covering an exposed portion of an optical transceiver inserted into a port of an optical transmission device is removably fixed to an attachment portion of the optical transmission device by a fixing member, removal of the fixing member from the attachment portion has begun, and, based on the detected result, performs necessary processing before removing the optical transceiver.

[0010] A control program according to one aspect of the present disclosure is a control program for causing a computer to execute a process that, when a cover covering an exposed portion of an optical transceiver inserted into a port of an optical transmission device is removably fixed to an attachment portion of the optical transmission device by a fixing member, detects that removal of the fixing member from the attachment portion has begun, and, based on the detected result, performs necessary processing before removing the optical transceiver. [Effects of the Invention]

[0011] According to the present disclosure, optical transceivers can be safely inserted and removed. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a schematic top view showing a configuration example of a related optical transceiver insertion / removal structure. FIG. [Figure 2] 1 is a schematic top view showing a configuration example of a related optical transceiver insertion / removal structure. FIG. [Figure 3] FIG. 10 is a sequence diagram illustrating an example of an insertion procedure in a related optical transceiver insertion / removal structure. [Figure 4] FIG. 10 is a sequence diagram illustrating an example of a removal procedure in a related optical transceiver insertion / removal structure. [Figure 5] 1 is a schematic top view illustrating a problem in a related optical transceiver insertion / removal structure. [Figure 6] 1 is a schematic top view illustrating an example of a configuration of an insertion / removal structure for an optical transceiver according to some embodiments. [Figure 7] FIG. 1 is a diagram illustrating an example of a functional block configuration of an optical transmission device according to some embodiments. [Figure 8] 1 is a schematic top view illustrating an example of a configuration of an insertion / removal structure for an optical transceiver according to some embodiments. [Figure 9] 1 is a schematic top view illustrating an example of a configuration of an insertion / removal structure for an optical transceiver according to some embodiments. [Figure 10] 1A to 1C are diagrams illustrating examples of screw configurations according to some embodiments. [Figure 11] 1A to 1C are diagrams illustrating examples of screw hole configurations according to some embodiments. [Figure 12] 1 is a schematic front view showing an example of the arrangement of lever switches in an optical transceiver insertion / removal structure according to some embodiments. FIG. [Figure 13]1 is a schematic front view showing an example of the arrangement of lever switches in an optical transceiver insertion / removal structure according to some embodiments. FIG. [Figure 14] 1 is a schematic front view showing an example of the arrangement of lever switches in an optical transceiver insertion / removal structure according to some embodiments. FIG. [Figure 15] 1 is a schematic front view showing an example of the arrangement of lever switches in an optical transceiver insertion / removal structure according to some embodiments. FIG. [Figure 16] 1 is a schematic front view showing an example of the arrangement of lever switches in an optical transceiver insertion / removal structure according to some embodiments. FIG. [Figure 17] 10A and 10B are sequence diagrams illustrating an example of an insertion procedure in an optical transceiver insertion / removal structure according to some embodiments. [Figure 18] 10 is a timing chart illustrating an example of an operation of an insertion procedure in an optical transceiver insertion / removal structure according to some embodiments. [Figure 19] 1A to 1C are schematic top views illustrating an insertion procedure in an optical transceiver insertion / removal structure according to some embodiments. [Figure 20] 10A and 10B are sequence diagrams illustrating an example of a removal procedure in an optical transceiver insertion / removal structure according to some embodiments. [Figure 21] 10 is a timing chart illustrating an example of an operation of an extraction procedure in an optical transceiver insertion / extraction structure according to some embodiments. [Figure 22] 1A to 1C are schematic top views illustrating a removal procedure in an optical transceiver insertion / removal structure according to some embodiments. [Figure 23] 1 is a schematic right side view illustrating an example of the configuration of a front cover in an optical transceiver insertion / removal structure according to some embodiments. FIG. [Figure 24] 1 is a schematic right side view illustrating an example of the configuration of a front cover in an optical transceiver insertion / removal structure according to some embodiments. FIG. [Figure 25] FIG. 1 is a diagram illustrating an example of the hardware configuration of a computer according to some embodiments. DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, embodiments will be described with reference to the drawings. In the drawings, the same elements are denoted by the same reference numerals, and redundant description will be omitted as necessary.

[0014] (Review of related technologies) Common pluggable optical transceivers include digital coherent transceivers with form factors such as QSFP56-DD (Quad Small Form Factor Pluggable - Double Density), OSFP (Octal Small Form Factor Pluggable), QSFP112, and CFP2-DCO (Centum Form-factor Pluggable 2 - Digital Coherent Optic). These optical transceivers are capable of transmitting data at 400 Gbps over distances of tens to thousands of kilometers, with power consumption of approximately 10 W to 30 W. These optical transceivers also support hot swapping.

[0015] In recent years, even higher performance pluggable optical transceivers have been developed. For example, a digital coherent transceiver capable of transmitting at 1200 Gbps over distances of several hundred to over 10,000 km has been developed as a high performance pluggable optical transceiver. The power consumption of such a pluggable optical transceiver is several times that of CFP2-DCO.

[0016] As described above, optical transceivers developed in recent years have become more powerful, consuming more power, and as they become smaller and more dense, it is becoming more difficult to implement circuits to prevent hot swapping. Furthermore, as performance improves, the supervisory and control communication lines between optical transceivers and optical transmission equipment are also beginning to require Gbps-rate high-speed interfaces, a typical example of which is PCIe (Peripheral Component Interconnect Express). However, such high-speed interfaces are not fully compatible with hot swapping, and require advance preparation.

[0017] When removing an optical transceiver that does not support hot swapping, the operating system (OS) must unmount the device beforehand. For this reason, there are cases where hot swapping must be avoided for pluggable optical transceivers. Therefore, the inventors have studied the insertion and removal procedures for optical transceivers that do not support hot swapping, such as PCIe devices.

[0018] 1 and 2 are schematic top views showing an example of the configuration of a related optical transceiver insertion / removal structure 9. Fig. 1 shows an optical transceiver 900 being removed from an optical transmission device 800, and Fig. 2 shows the optical transceiver 900 being inserted into the optical transmission device 800.

[0019] 1 and 2, in a related optical transceiver insertion / removal structure 9, an optical transceiver 900 can be inserted into or removed from a port 801 of an optical transmission device 800. As shown in Figures 1 and 2, the optical transmission device 800 includes the port 801, a terminal unit 810, an insertion / removal detection circuit 820, a power supply circuit 830, and a controller 840. The port 801 is a port for inserting the optical transceiver 900.

[0020] The terminal unit 810 is a connector including multiple terminals that are electrically connected to the respective terminals of the optical transceiver 900. The terminal unit 810 is disposed at the bottom of the insertion hole of the port 801. The terminal unit 810 includes terminals 810a and 810b for an insertion / removal detection line 811, terminals 810c and 810d for a power supply line 812, and terminals 810e and 810f for a monitoring and control communication line 813.

[0021] The insertion / removal detection circuit 820 detects the insertion / removal state of the optical transceiver 900. The insertion / removal detection circuit 820 is connected to the terminals 810a and 810b via an insertion / removal detection line 811. The insertion / removal detection circuit 820 detects the insertion / removal state of the optical transceiver 900 via the insertion / removal detection line 811. The insertion / removal detection circuit 820 is connected to the controller 840 via a detection line 814. The insertion / removal detection circuit 820 notifies the controller 840 of the detection result of the insertion / removal state of the optical transceiver 900 via the detection line 814.

[0022] The power supply circuit 830 supplies power to the optical transceiver 900. The power supply circuit 830 is connected to the controller 840 via a control line 815. A power supply start or stop instruction is input to the power supply circuit 830 from the controller 840 via the control line 815. The power supply circuit 830 is connected to terminals 810c and 810d via a power supply line 812. The power supply circuit 830 starts or stops supplying power to the optical transceiver 900 via the power supply line 812 in response to the input power supply start or power supply stop instruction.

[0023] The controller 840 controls the operation of each component of the optical transmission device 800. The controller 840 is connected to the insertion / removal detection circuit 820 via a detection line 814, to the power supply circuit 830 via a control line 815, and to terminals 810e and 810f via a supervisory control communication line 813. The controller 840 receives the detection result of the insertion / removal state of the optical transceiver 900 from the insertion / removal detection circuit 820 via the detection line 814, and also receives instructions from the user as necessary. In response to the input, the controller 840 mounts / unmounts the optical transceiver 900, instructs the power supply circuit 830 to start or stop power supply via the control line 815, communicates with the optical transceiver 900, and so on.

[0024] 1 and 2, the optical transceiver 900 includes a terminal unit 910, a power receiving circuit 920, a microcontroller 930, and an optical receptacle 940. The optical receptacle 940 is a connector terminal for connecting an optical fiber connector.

[0025] Terminal unit 910 is a connector including a plurality of terminals electrically connected to the respective terminals of optical transmission device 800. Terminal unit 910 is disposed on the opposite side from optical receptacle 940. Note that in optical transceiver 900, the side on which optical receptacle 940 is disposed may be referred to as the front side, and the side on which terminal unit 910 is disposed may be referred to as the rear side. Also, in optical transceiver 900, both sides in a direction perpendicular to the front-to-rear direction may be referred to as the left side and the right side.

[0026] The terminal section 910 includes terminals 910a and 910b for an insertion / removal detection line 911, terminals 910c and 910d for a power supply line 912, and terminals 910e and 910f for a monitoring and control communication line 913. The insertion / removal detection line 911 is folded back and connected between the terminals 910a and 910b.

[0027] The power receiving circuit 920 supplies power received from the optical transmission device 800 to each component of the optical transceiver 900. The power receiving circuit 920 is connected to the terminals 910c and 910d via a power feeder 912. The power receiving circuit 920 is supplied with power from the optical transmission device 800 via the power feeder 912.

[0028] The microcontroller 930 controls the operation of each component of the optical transceiver 900. The microcontroller 930 is connected to the terminals 910e and 910f via a supervisory control communication line 913. The microcontroller 930 communicates with the optical transmission device 800 via the supervisory control communication line 913.

[0029] 3 shows an example of an insertion procedure in the related optical transceiver insertion / removal structure 9. The insertion procedure in FIG. 3 will be described with reference to FIGS.

[0030] First, in a state where the optical transceiver 900 is removed as shown in Fig. 1, the user inserts the optical transceiver 900 into the port 801 of the optical transmission device 800 (S901). This results in the optical transceiver 900 being inserted as shown in Fig. 2. The terminal section 810 and the terminal section 910 are connected, and the terminals are electrically connected to each other.

[0031] As a result, the insertion / removal detection lines 811 and 911 are short-circuited, and the insertion / removal detection circuit 820 of the optical transmission device 800 detects the insertion of the optical transceiver 900 (S902) and notifies the controller 840 of the insertion detection (S903). When the controller 840 is notified of the insertion detection by the insertion / removal detection circuit 820, it instructs the power supply circuit 830 to start feeding power (S904). In response to the instruction from the controller 840, the power supply circuit 830 starts feeding power to the optical transceiver 900 (S905).

[0032] Next, when power is supplied from the optical transmission device 800, the power receiving circuit 920 of the optical transceiver 900 starts supplying power to the microcontroller 930 and the like (S906). When power is supplied from the power receiving circuit 920, the microcontroller 930 starts up autonomously (S907). Thereafter, the controller 840 attempts to communicate with the microcontroller 930, and communication is established (S908). When communication with the microcontroller 930 is established, the controller 840 mounts the optical transceiver 900 on the OS (S909). Furthermore, the controller 840 starts monitoring and control with the microcontroller 930.

[0033] 4 shows an example of a related removal procedure for the optical transceiver insertion / removal structure 9. The removal procedure of FIG. 4 will be described with reference to FIGS.

[0034] First, when the optical transceiver 900 is to be removed from the inserted state as shown in Fig. 2, necessary processing is performed before the removal. Specifically, as shown in Fig. 4, the user instructs the controller 840 of the optical transmission device 800 to unmount (S911), and the controller 840 unmounts the optical transceiver 900 from the OS in response to the user instruction (S912).

[0035] Next, the user instructs the controller 840 to stop power supply (S913), and the controller 840 instructs the power supply circuit 830 to stop power supply in response to the instruction from the user (S914). The power supply circuit 830 stops power supply to the optical transceiver 900 in response to the instruction from the controller 840 (S915).

[0036] Next, when the power supply from the optical transmission device 800 is stopped, the power receiving circuit 920 of the optical transceiver 900 stops supplying power to the microcontroller 930 and the like (S916). When the power supply from the power receiving circuit 920 is stopped, the microcontroller 930 stops operating (S917). If the optical transceiver 900 is removed before the power supply is stopped, the power receiving circuit 920 and components downstream thereof may be electrically damaged.

[0037] Thereafter, communication between the controller 840 and the microcontroller 930 is interrupted (S918). Next, the user removes the optical transceiver 900 from the port 801 of the optical transmission device 800 (S919). This results in the optical transceiver 900 being removed, as shown in FIG. 1. If communication is interrupted before unmounting, the OS may stop. Furthermore, if the optical transceiver 900 is removed during communication, the control line terminals of the controller 840 and the microcontroller 930 may be electrically damaged.

[0038] As described above, when removing an optical transceiver, the user must take necessary precautions, such as unmounting the transceiver and cutting off the power supply. If the user forgets to do so, the removal of the transceiver may cause damage to the optical transmission equipment or the transceiver itself.

[0039] 5 illustrates a problem that occurs when inserting a related optical transceiver insertion / removal structure 9. As shown in FIG. 5, in the related optical transceiver insertion / removal structure 9, an optical transceiver 900 may be inserted obliquely into a port 801 (terminal portion 810). In this example, insertion / removal detection line 811 is connected to insertion / removal detection line 911, but power feed line 812 is not connected to power feed line 912 and supervisory control communication line 813 is not connected to supervisory control communication line 913. Therefore, even though the insertion of optical transceiver 900 is detected, the power feed line and supervisory control communication line are not connected, which may lead to malfunction.

[0040] (Embodiment 1) Next, a first embodiment will be described. Fig. 6 is a schematic top view showing an example of the configuration of an optical transceiver insertion / removal structure 1 according to some embodiments. Fig. 6 shows a state in which an optical transceiver 20 is being inserted into an optical transmission device 10.

[0041] 6, the optical transceiver insertion / removal structure 1 includes an optical transmission device 10, an optical transceiver 20, and a cover 30. The optical transmission device 10 is a communication device that performs optical communication via an optical fiber connected to the optical transceiver 20. The optical transmission device 10 includes a port 11 and a mounting portion 12. The port 11 is an insertion portion into which the optical transceiver 20 is inserted or removed.

[0042] The optical transceiver 20 is a pluggable optical transceiver that can be inserted into or removed from the port 11 of the optical transmission device 10. For example, the optical transceiver 20 may be a digital coherent transceiver capable of 400 Gbps transmission, such as QSFP56-DD, OSFP, QSFP112, or CFP2-DCO, or a higher-performance digital coherent transceiver capable of 1200 Gbps transmission. The optical transceiver 20 may be connected to the optical transmission device 10 via PCIe or another interface.

[0043] The cover 30 is a cover (front cover) for covering the optical transceiver 20 inserted into the port 11 of the optical transmission device 10. The cover 30 covers the front of the optical transceiver 20, i.e., the exposed portion of the inserted optical transceiver 20 that is exposed from the port 11.

[0044] 6, the optical transceiver 20 inserted into the port 11 of the optical transmission device 10 is covered with a cover 30, and the cover 30 is removably fixed to the mounting portion 12 of the optical transmission device 10 by a fixing member 31. For example, the fixing member 31 may be a screw, and the mounting portion 12 may be a screw hole into which the screw is inserted.

[0045] The cover 30 may be fixed using one fixing member 31, or multiple fixing members 31. For example, the first and second mounting portions 12 may be disposed around the outer periphery of the opening of the port 11. The cover 30 may be fixed to the first mounting portion 12 by a first fixing member 31, and vice versa. For example, the first and second fixing members 31 may fix the cover 30 on both the left and right sides of the optical transceiver 20. For example, the left and right direction is also the direction in which multiple terminals that electrically connect the optical transceiver 20 and the port 11 are arranged.

[0046] 7 illustrates an example of a functional block configuration of an optical transmission device 10 according to some embodiments. In the example of Fig. 7, the optical transmission device 10 includes a detection unit 13 and a control unit 14 in addition to the port 11 and the attachment unit 12 illustrated in Fig. 6.

[0047] The detection unit 13 detects the attachment state of the fixing member 31 in the attachment unit 12. The detection unit 13 detects that the fixing member 31 is being removed from the attachment unit 12. Specifically, the detection unit 13 detects that removal of the fixing member 31 from the attachment unit 12 has started. The detection unit 13 may detect the period from when removal of the fixing member 31 from the attachment unit 12 has started until the removal is completed. If the fixing member 31 can be inserted into the attachment unit 12, the detection unit 13 may detect that the fixing member 31 is in the process of being removed from the attachment unit 12. For example, the detection unit 13 may be a switch that detects the presence or absence of the tip of a screw at the bottom of a screw hole.

[0048] Based on the detection result of the detection unit 13, the control unit 14 executes pre-removal preparation processing (pre-preparation processing) for the optical transceiver 20. The pre-removal preparation processing is processing required before removing the optical transceiver 20. For example, the pre-removal preparation processing includes unmounting the optical transceiver 20 and stopping power supply to the optical transceiver 20.

[0049] As described above, in this embodiment, an optical transceiver is inserted into an optical transmission device, and a cover covering the inserted optical transceiver is removably fixed with a fixing member such as a screw. This allows the optical transceiver to be properly inserted. For example, by fixing with multiple fixing members, the optical transceiver can be inserted reliably without malfunction. Furthermore, by fixing the cover covering the optical transceiver with a fixing member, when removing the optical transceiver, the fixing member must first be removed. This makes it possible to perform necessary pre-removal processing before the optical transceiver is removed between the time the fixing member is removed and the time the optical transceiver is actually removed. The optical transmission device detects the start of removal of the fixing member, for example, when the fixing member is being removed, and automatically performs necessary pre-removal processing based on the detection result, thereby ensuring the necessary pre-removal processing. This allows the optical transceiver to be inserted and removed safely.

[0050] (Embodiment 2) Next, a description will be given of a second embodiment. In this embodiment, a specific example of the first embodiment will be described.

[0051] 8 and 9 are schematic top views showing configuration examples of an optical transceiver insertion / removal structure 2 according to some embodiments. In the examples of Fig. 8 and Fig. 9, the optical transceiver insertion / removal structure 2 includes an optical transmission device 100, an optical transceiver 200, and a front cover 300. Fig. 8 shows a state in which the optical transceiver 200 has been removed and the front cover 300 has been detached, while Fig. 9 shows a state in which the optical transceiver 200 has been inserted and the front cover 300 has been attached.

[0052] FIG. 10 shows an example of the configuration of a screw 310 for attaching the front cover 300. FIG. 11 shows an example of the configuration of a screw hole 150 of the optical transmission device 100 into which the screw 310 is inserted. The screw 310 is an example of a fixing member that detachably fixes the front cover 300. The screw hole 150 is an example of an attachment portion that attaches the front cover 300 with a fixing member. In the example of FIG. 10, the screw 310 includes a head 311, a male threaded portion 312, and a tip portion 313. The male threaded portion 312 has a male thread thread formed thereon that threadably engages with the female thread of the screw hole 150. The male threaded portion 312 is formed from the head 311 of the screw 310 to partway along the shank. For example, the length of the male threaded portion 312 corresponds to the depth of the female thread of the screw hole 150. A tip portion 313 of the screw 310 beyond the male threaded portion 312 does not have a thread formed thereon.

[0053] 11, the screw hole 150 includes a female thread portion 151 and a bottom portion 152. The female thread portion 151 has a female thread thread that screws together with the male thread of the screw 310. The female thread portion 151 is formed from the surface of the housing of the optical transmission device 100 to partway through the screw hole. The bottom portion 152 of the screw hole 150, which is deeper than the female thread portion 151, does not have a thread.

[0054] As shown in FIGS. 8 and 9, the optical transmission device 100 includes a port 101, a terminal unit 110, an insertion / removal detection circuit 120, a power supply circuit 130, a controller 140, screw holes 150 (150a and 150b), and lever switches 160 (160a and 160b).

[0055] The port 101, the terminal unit 110, and the power supply circuit 130 are the same as those in Figures 1 and 2. That is, the port 101 is a port into which the optical transceiver 200 is inserted.

[0056] The terminal unit 110 is a connector including multiple terminals that are electrically connected to the respective terminals of the optical transceiver 200. The terminal unit 110 is disposed at the bottom of the insertion hole of the port 101. The terminal unit 110 includes terminals 110a and 110b for the insertion / removal detection line 111, terminals 110c and 110d for the power supply line 112, and terminals 110e and 110f for the monitoring and control communication line 113.

[0057] The power supply circuit 130 supplies power to the optical transceiver 200. The power supply circuit 130 is connected to the controller 140 via a control line 115. A power supply start or stop instruction is input to the power supply circuit 130 from the controller 140 via the control line 115. The power supply circuit 130 is connected to terminals 110c and 110d via a power supply line 112. The power supply circuit 130 starts or stops supplying power to the optical transceiver 200 via the power supply line 112 in response to the input power supply start or power supply stop instruction.

[0058] The insertion / removal detection circuit 120 is a detector that detects the insertion / removal state of the optical transceiver 200 and also detects the attachment / detachment state of the front cover 300. In this example, the insertion / removal detection circuit 120 detects the insertion / removal state of the screws 310a and 310b that attach the front cover 300 as the attachment / detachment state of the front cover 300. The insertion / removal detection circuit 120 is connected to the terminals 110a and 110b via an insertion / removal detection line 111. The insertion / removal detection circuit 120 detects the insertion / removal state of the optical transceiver 200 via the insertion / removal detection line 111.

[0059] The insertion / removal detection circuit 120 is connected to the lever switches 160a and 160b via lever switch detection lines 116a and 116b. The insertion / removal detection circuit 120 detects the on / off states of the lever switches 160a and 160b via the lever switch detection lines 116a and 116b. The insertion / removal detection circuit 120 and the lever switches 160a and 160b can also be said to be a detection unit. The on / off states of the lever switches 160a and 160b indicate the inserted / removed states of the screws 310a and 310b that attach the front cover 300. In other words, the insertion / removal detection circuit 120 detects the inserted / removed states of the screws 310a and 310b using the lever switches 160a and 160b. For example, the insertion / removal detection circuit 120 detects that removal of the screws 310a and 310b has started, or more specifically, that the screws 310a and 310b are in the process of being removed, by the lever switches 160a and 160b.

[0060] The insertion / removal detection circuit 120 is connected to the controller 140 via the detection line 114. The insertion / removal detection circuit 120 notifies the controller 140 of the detection results of the insertion / removal state of the optical transceiver 200 and the insertion / removal state of the screws 310a and 310b via the detection line 114. For example, the insertion / removal detection circuit 120 notifies the controller 140 of the insertion detection when it detects the insertion of the optical transceiver 200 and the insertion of the screws 310a and 310b. Alternatively, the insertion / removal detection circuit 120 may notify the controller 140 of the insertion detection of all of the optical transceiver 200 and the screws 310a and 310b, and the controller 140 may determine whether all of the insertions have been detected. Alternatively, the insertion / removal detection circuit 120 notifies the controller 140 of the removal detection when it detects the removal of either the optical transceiver 200 or the screws 310a and 310b.

[0061] The controller 140 is a control unit that controls the operation of each unit of the optical transmission device 100. The controller 140 is connected to the insertion / removal detection circuit 120 via a detection line 114, to the power supply circuit 130 via a control line 115, and to the terminals 110e and 110f via a supervisory control communication line 113. The controller 140 receives detection results of the insertion / removal states of the optical transceiver 200 and the screws 310a and 310b from the insertion / removal detection circuit 120 via the detection line 114. Depending on the detection results of the insertion / removal states of the optical transceiver 200 and the screws 310a and 310b, the controller 140 performs operations such as mounting / unmounting the optical transceiver 200, issuing an instruction to the power supply circuit 130 to start or stop power supply via the control line 115, and communicating with the optical transceiver 200 via the supervisory control communication line 113. For example, when the controller 140 detects that the optical transceiver 200 and the screws 310a and 310b are all inserted, it issues an instruction to mount the optical transceiver 200 and start supplying power. When the controller 140 detects that any of the optical transceiver 200 or the screws 310a and 310b has been removed (including when the removal has started or is in progress), it issues an instruction to unmount the optical transceiver 200 and stop supplying power.

[0062] In the example of FIGS. 8 and 9, screw holes 150a and 150b are formed on the left and right sides of the port 101. Lever switches 160a and 160b are arranged corresponding to the screw holes 150a and 150b. The lever switches 160a and 160b detect the screws 310a and 310b inserted into the screw holes 150a and 150b. The lever switches 160a and 160b detect the presence or absence of the screws 310a and 310b in the bottoms 152a and 152b of the screw holes 150a and 150b. For example, the lever switches 160a and 160b include levers 161a and 161b that can be switched. The levers 161a and 161b are arranged to protrude into the bottoms 152a and 152b of the screw holes 150a and 150b. The positions of the levers 161a and 161b determine the ON / OFF operating points of the lever switches 160a and 160b. When the screws 310a and 310b are inserted into the screw holes 150a and 150b and the tips 313a and 313b of the screws 310a and 310b press the levers 161a and 161b, the lever switches 160a and 160b are turned ON. When the screws 310a and 310b are removed from the screw holes 150a and 150b and the tips 313a and 313b of the screws 310a and 310b move away from the levers 161a and 161b, the lever switches 160a and 160b are turned OFF. The lever switches 160a and 160b output ON / OFF signals corresponding to the insertion or removal of the screws 310a and 310b via the lever switch detection lines 116a and 116b. This makes it possible to detect the inserted / removed states of the screws 310a and 310b. For example, it is possible to detect that removal of the screws 310a and 310b has started, or more specifically, that the screws 310a and 310b are in the process of being removed. The detection timing by the lever switches 160a and 160b can be adjusted by the positions of the levers 161a and 161b.

[0063] It should be noted that the inserted / removed state of the screw 310 may be detected by other switches or detection means, not limited to the lever switch 160. Furthermore, the lever switch 160 may be pressed by other fixing members, not limited to the screw 310. For example, it is preferable that the fixing member be one that takes a certain amount of time to remove the front cover 300, similar to the screw.

[0064] 8 and 9, optical transceiver 200 includes terminal unit 210, power receiving circuit 220, microcontroller 230, and optical receptacle 240. Terminal unit 210, power receiving circuit 220, microcontroller 230, and optical receptacle 240 are the same as those in Figures 1 and 2. That is, optical receptacle 240 is a connector terminal for connecting an optical fiber connector.

[0065] Terminal unit 210 is a connector including a plurality of terminals electrically connected to the respective terminals of optical transmission device 100. Terminal unit 210 is disposed on the opposite side from optical receptacle 240. Terminal unit 210 includes terminals 210a and 210b for insertion / removal detection line 211, terminals 210c and 210d for power feed line 212, and terminals 210e and 210f for supervisory control communication line 213. Terminal 210a and terminal 210b are connected by insertion / removal detection line 211, which is folded back.

[0066] The power receiving circuit 220 supplies power received from the optical transmission device 100 to each component of the optical transceiver 200. The power receiving circuit 220 is connected to the terminals 210c and 210d via a power feeder 212. The power receiving circuit 220 is supplied with power from the optical transmission device 100 via the power feeder 212.

[0067] The microcontroller 230 controls the operation of each component of the optical transceiver 200. The microcontroller 230 is connected to the terminals 210e and 210f via a supervisory control communication line 213. The microcontroller 230 communicates with the optical transmission device 100 via the supervisory control communication line 213.

[0068] The front cover 300 is a cover that covers the front surface (the surface on which the optical receptacle is arranged) of the optical transceiver 200 inserted into the port 101. The front cover 300 includes a cover body 301 and fixing parts 302 (302a and 302b).

[0069] Cover body 301 has a shape that can cover the front surface of optical transceiver 200, i.e., the portion that is exposed from port 101 when optical transceiver 200 is inserted. For example, cover body 301 has a shape that corresponds to the front surface of optical transceiver 200 and does not interfere with optical receptacle 240.

[0070] The fixing portions 302a and 302b fix the cover body 301 to the optical transmission device 100. Through holes 303a and 303b are formed in the fixing portions 302a and 302b. Screws 310a and 310b are passed through the through holes 303a and 303b and inserted into the screw holes 150a and 150b of the optical transmission device 100. Heads 311a and 311b of the screws 310a and 310b press against the fixing portions 302a and 302b, thereby fixing the cover body 301 to the optical transmission device 100.

[0071] 8 and 9 are merely examples, and are not limited to these examples. A plurality of lever switches 160 and screws 310 may be arranged. A plurality of lever switches 160 and screws 310 may be arranged at any position on the periphery of the optical transceiver 200 (port 101). For example, the lever switches 160 and screws 310 may be arranged at any position on the left or right of the optical transceiver 200, or at other positions. By arranging them on the left or right of the optical transceiver 200, it is possible to prevent the optical transceiver 200 from being inserted at an angle.

[0072] 12 to 16 are schematic front views showing examples of arrangements of lever switches 160 according to some embodiments. The position of the lever switch 160 is also the position of the screw 310 (screw hole 150). The position of the optical transceiver 200 is also the position of the port 101. For example, the arrangement examples of FIGS. 12 to 16 may be combined.

[0073] 12, the two lever switches 160a and 160b are arranged on both the left and right sides of the optical transceiver 200, and are at the same vertical position (height). The lever switches 160a and 160b are arranged opposite each other in the left-right direction. For example, the lever switches 160a and 160b are arranged in the center of the left and right sides of the optical transceiver 200. The lever switches 160a and 160b may be arranged above the center of the left and right sides of the optical transceiver 200, or below the center of the left and right sides of the optical transceiver 200.

[0074] 13, the two lever switches 160a and 160b are disposed on both the left and right sides of the optical transceiver 200, and are at different positions (heights) in the up-down direction. For example, the lever switch 160a is disposed above the center on the left side of the optical transceiver 200. The lever switch 160b is disposed below the center on the right side of the optical transceiver 200. Alternatively, the lever switch 160a may be disposed below the center on the left side of the optical transceiver 200, and the lever switch 160b may be disposed above the center on the right side of the optical transceiver 200.

[0075] 14, the two lever switches 160a and 160b are arranged on both the top and bottom of the optical transceiver 200, and are positioned at the same position in the left-right direction. The lever switches 160a and 160b are arranged opposite each other in the up-down direction. For example, the lever switches 160a and 160b are arranged in the center of the top and bottom of the optical transceiver 200. The lever switches 160a and 160b may be arranged to the right of the center of the top and bottom of the optical transceiver 200, or may be arranged to the left of the center of the top and bottom of the optical transceiver 200.

[0076] In the example of FIG. 15, the two lever switches 160a and 160b are disposed on both the top and bottom sides of the optical transceiver 200, and are located at different positions in the left-right direction. For example, the lever switch 160a is disposed at the left end of the top side of the optical transceiver 200. It is not limited to being disposed at the left end, but it may be disposed to the left of the center. The lever switch 160b is disposed at the right end of the bottom side of the optical transceiver 200. It is not limited to being disposed at the right end, but it may be disposed to the right of the center. It is also possible to dispose the lever switch 160a at the right end of the top side of the optical transceiver 200 and dispose the lever switch 160b at the left end of the bottom side of the optical transceiver 200.

[0077] In the example of FIG. 16, the two lever switches 160a and 160b are arranged below the optical transceiver 200. For example, the lever switch 160a is arranged at the left end of the lower side of the optical transceiver 200. It is not limited to being arranged at the left end, but it may be arranged to the left of the center. The lever switch 160b is arranged at the right end of the lower side of the optical transceiver 200. It is not limited to being arranged at the right end, but it may be arranged to the right of the center. The lever switches 160a and 160b may be arranged above the optical transceiver 200. The lever switches 160a and 160b may be arranged on the right or left side of the optical transceiver 200.

[0078] Fig. 17 shows an example of an insertion procedure in an optical transceiver insertion / removal structure 2 according to some embodiments. Fig. 18 is a time chart showing an example of operations corresponding to S101 to S107 in Fig. 17. Fig. 19 shows a state in which optical transceiver 200 has been inserted and front cover 300 has been removed. The insertion procedures in Figs. 17 and 18 will be described with reference to Figs. 8, 9, and 19.

[0079] First, as shown in FIG. 8, with the optical transceiver 200 removed and the front cover 300 detached, a user inserts the optical transceiver 200 into the port 101 of the optical transmission device 100 (S101). This results in the optical transceiver 200 being inserted and the front cover 300 being detached, as shown in FIG. 19. The terminal unit 110 and the terminal unit 210 are connected, and the terminals are electrically connected. As a result, the insertion / removal detection lines 111 and 211 are short-circuited, and the insertion / removal detection circuit 120 of the optical transmission device 100 detects the insertion of the optical transceiver 200 (S102). For example, as shown in FIG. 18, when the insertion of the optical transceiver 200 begins at T1, the insertion / removal detection line 111 starts rising from off at T2. After a chattering period, the insertion / removal detection line 111 turns on at T3, and the insertion / removal detection circuit 120 detects the insertion of the optical transceiver 200. At this time, the insertion / removal detection circuit 120 does not notify the controller 140 of the detection of the insertion.

[0080] After inserting the optical transceiver 200, the user places the front cover 300 over the front of the optical transceiver 200 (S103). As shown in FIG. 18, the user can begin attaching the front cover 300 at the same time as or after the start of insertion of the optical transceiver 200 (e.g., T1). Next, the user inserts the screw 310a (first screw) into the screw hole 150a (S104). This turns on the lever switch 160a (first lever switch), and the insertion / removal detection circuit 120 detects the insertion of the screw 310a (first screw) via the lever switch detection line 116a (S105). As shown in FIG. 18, the user can begin inserting the screw 310a (first screw) at the same time as or after the start of attachment of the front cover 300 (e.g., T1). Note that either the screw 310a (first screw) or the screw 310b (second screw) may be inserted first. 18, when the insertion of the screw 310a (first screw) starts at T4, the output of the lever switch 160a (lever switch detection line 116a) starts to rise from OFF at T5 when the screw 310a reaches the operating point of the lever switch 160a (first lever switch), and at T6 after a chattering period the output of the lever switch 160a turns ON, and the insertion / removal detection circuit 120 detects the insertion of the screw 310a. At this time, the insertion / removal detection circuit 120 does not notify the controller 140 of the detection of the insertion.

[0081] Next, the user inserts screw 310b (second screw) into screw hole 150b (S106). This inserts optical transceiver 200 and attaches front cover 300, as shown in FIG. 9. This turns on lever switch 160b (second lever switch), and insertion / removal detection circuit 120 detects the insertion of screw 310b (second screw) via lever switch detection line 116b (S107). As shown in FIG. 18, insertion of screw 310b (second screw) can begin simultaneously with or after the start of attachment of front cover 300 (e.g., T1). For example, as shown in FIG. 18, when the insertion of screw 310b (second screw) begins at T7, at T8 when screw 310b reaches the operating point of lever switch 160b (second lever switch), the output of lever switch 160b (lever switch detection line 116b) begins to rise from off, and at T9 after a chattering period the output of lever switch 160b turns on, and insertion / removal detection circuit 120 detects the insertion of screw 310b.

[0082] Next, the insertion / removal detection circuit 120 notifies the controller 140 of the insertion detection because the insertion / removal detection line 111 and the two lever switch detection lines 116 have all detected insertion (S108). For example, as shown in FIG. 18, at T9, the output of the lever switch 160b (second lever switch) turns on, and all detection results are on, so the insertion / removal detection circuit 120 switches the state of the detection line 114 from removal to insertion. The order in which the detection results of the insertion / removal detection line 111, lever switch 160a, and lever switch 160b change from off to on is not limited, and when all detection results are on, the state of the detection line 114 is changed to insertion. Note that the front cover 300 is completely fixed (attached) when both the screw 310a (first screw) and the screw 310b (second screw) are completely inserted (for example, at T9). After the state of the detection line 114 changes to "inserted" at T9, the controller 140 starts power feeding, mounts, and performs monitoring control. That is, when the controller 140 receives a notification from the insertion / removal detection circuit 120 that an insertion has been detected, it instructs the power feeding circuit 130 to start feeding power (S109). In response to the instruction from the controller 140, the power feeding circuit 130 starts feeding power to the optical transceiver 200 (S110).

[0083] Next, when power is supplied from the optical transmission device 100, the power receiving circuit 220 of the optical transceiver 200 starts supplying power to the microcontroller 230 and other components (S111). When power is supplied from the power receiving circuit 220, the microcontroller 230 starts up autonomously (S112). Thereafter, the controller 140 attempts to communicate with the microcontroller 230, and communication is established (S113). Once communication with the microcontroller 230 is established, the controller 140 mounts the optical transceiver 200 on the OS (S114). Furthermore, the controller 140 starts monitoring and control between the microcontroller 230 and the controller 140.

[0084] FIG. 20 shows an example of the removal procedure for the optical transceiver insertion / removal structure 2 according to some embodiments. FIG. 21 is a time chart showing an example of the operations corresponding to S201 to S202 and S210 to S212 in FIG. 20. FIG. 22 shows the state after the optical transceiver 200 has been inserted, the front cover 300 has been attached, and the screws 310a have been removed. The removal procedures in FIGS. 20 and 21 will be described with reference to FIGS. 8, 9, 19, and 22.

[0085] First, when removing the optical transceiver 200 from a state in which the optical transceiver 200 is inserted and the front cover 300 is attached as shown in FIG. 9, the user removes the screw 310a (first screw) from the screw hole 150a (S201). This results in a state in which the optical transceiver 200 is inserted, the front cover 300 is attached, and the screw 310a is removed, as shown in FIG. 22. This turns off the lever switch 160a (first lever switch), and the insertion / removal detection circuit 120 detects the removal of the screw 310a via the lever switch detection line 116a (S202). For example, the insertion / removal detection circuit 120 detects the screw 310a being removed from the screw hole 150a. Note that either the screw 310a (first screw) or the screw 310b (second screw) may be removed first. For example, as shown in FIG. 21, when removal of the screw 310a (first screw) begins at T11, at T12 when the screw 310a has been removed before the operating point of the lever switch 160a (first lever switch), the output of the lever switch 160a (lever switch detection line 116a) begins to fall from on, and at T13 after a chattering period the output of the lever switch 160a turns off, and the insertion / removal detection circuit 120 detects the removal of the screw 310a.

[0086] Next, the insertion / removal detection circuit 120 detects removal via the insertion / removal detection line 111 or one of the two lever switch detection lines 116, and therefore notifies the controller 140 of the removal detection (S203). In this example, the insertion / removal detection circuit 120 detects that the screw 310a is being removed from the screw hole 150a, and notifies the controller 140 of the removal detection. For example, as shown in FIG. 21 , the output of the lever switch 160a (first lever switch) turns off at T13, and one of the detection results turns off, so the insertion / removal detection circuit 120 switches the state of the detection line 114 from insertion to removal. The order in which the detection results of the insertion / removal detection line 111, lever switch 160a, and lever switch 160b change from off to on is not limited, and the state of the detection line 114 is changed to removal when one of the detection results turns off. Between the time when the detection line 114 indicates removal at T13 and the time when removal of the optical transceiver 200 begins at T18, the controller 140 performs the following processes: stop monitoring control, unmount, and stop power supply. For example, the time from T13 to T18 can be increased depending on the length of the screw 310. When the controller 140 is notified by the insertion / removal detection circuit 120 that removal has been detected, it stops monitoring control and unmounts the optical transceiver 200 from the OS (S204). The controller 140 may unmount the optical transceiver 200 when it is notified of removal, or may unmount the optical transceiver 200 when a predetermined time has passed since the removal was notified and the removal state has stabilized.

[0087] After unmounting, the controller 140 instructs the power supply circuit 130 to stop power supply (S205). In response to the instruction from the controller 140, the power supply circuit 130 stops power supply to the optical transceiver 200 (S206).

[0088] Next, when the power supply from the optical transmission device 100 is stopped, the power receiving circuit 220 of the optical transceiver 200 stops supplying power to the microcontroller 230 and the like (S207). When the power supply from the power receiving circuit 220 is stopped, the microcontroller 230 stops operating (S208). Thereafter, communication between the controller 140 and the microcontroller 230 is interrupted (S209).

[0089] 21, when the user starts removing the screw 310b (second screw) at T14, the output of the lever switch 160b (lever switch detection line 116b) starts to fall from ON at T15, when the screw 310b is removed before the operating point of the lever switch 160b (second lever switch). At T16, after a chattering period, the output of the lever switch 160b turns OFF, and the insertion / removal detection circuit 120 detects the removal of the screw 310b. The user then removes the front cover 300 from the front of the optical transceiver 200 (S211). As shown in FIG. 21, removal of the front cover 300 can begin simultaneously with or after the start of removal of either the screw 310a (first screw) or the screw 310b (second screw) (e.g., T11), or simultaneously with or after the start of removal of the other screw (e.g., T14). The front cover 300 is completely removed simultaneously with or after the completion of removal of both the screw 310a (first screw) and the screw 310b (second screw) (e.g., T17). As a result, the optical transceiver 200 is inserted and the front cover 300 is detached, as shown in FIG. 19. The insertion / removal detection circuit 120 detects the removal of the screw 310b but does not notify the controller 140. The user then removes the optical transceiver 200 (S212). As a result, the optical transceiver 200 is removed and the front cover 300 is detached, as shown in FIG. 8. 21, removal of the optical transceiver 200 can begin only after the front cover 300 is completely removed (e.g., at T18). For example, as shown in FIG. 21, when removal of the optical transceiver 200 begins at T18, the insertion / removal detection line 111 starts to fall from ON, and at T19 after a chattering period, the insertion / removal detection line 111 turns OFF, and the insertion / removal detection circuit 120 detects the removal of the optical transceiver 200. Note that although the insertion / removal detection circuit 120 detects the removal of the optical transceiver 200, it does not notify the controller 140.

[0090] As described above, in this embodiment, the cover that covers the front of the optical transceiver is fixed with the left and right screws of the optical transceiver, and lever switches are provided to detect the insertion and removal of the left and right screws. In this embodiment, the controller is not notified of the insertion unless the left and right screws are fully inserted and the left and right lever switches detect the insertion. This prevents malfunctions caused by inserting the screw diagonally.

[0091] In addition, in this embodiment, while one of the left and right screws is being removed, either the left or right lever switch detects the removal and notifies the controller of the removal. This notification allows the optical transmission device to autonomously prepare for removal in advance without user instructions. In this embodiment, the optical transceiver cannot be removed unless the left and right screws are removed and the front cover is removed. This makes it possible to avoid hot swapping. For example, depending on the length of the screw stroke, the number of screws, etc., the time between when the lever switch detects removal and when the front cover is removed can be extended, thereby ensuring time for preparation.

[0092] Therefore, the user can safely insert and remove the optical transceiver simply by attaching and detaching the front cover and the optical transceiver.

[0093] (Modification of the second embodiment) In the above example, the front cover 300 is separate from the optical transmission device 100 and the optical transceiver 200, but it may be integrated with the optical transmission device 100 or the optical transceiver 200. For example, the front cover 300 may be connected to the optical transmission device 100 or the optical transceiver 200 by a hinge, making them one unit. By integrating the front cover 300 with the optical transmission device 100 or the optical transceiver 200, it is possible to prevent the front cover 300 from being forgotten to be attached.

[0094] FIG. 23 is a schematic right side view illustrating an exemplary configuration of a front cover 300 according to some embodiments. In the example of FIG. 23, the front cover 300 is rotatably connected to the optical transmission device 100 by a hinge 320. For example, when inserting the optical transceiver 200, first, the front cover 300 connected to the optical transmission device 100 is lifted upward to open the opening of the port 101. In this state, the optical transceiver 200 is inserted into the port 101 of the optical transmission device 100. Next, the front cover 300 connected to the optical transmission device 100 is lowered to place the front cover 300 over the front of the optical transceiver 200, and then the screws 310 are attached as in the above example.

[0095] 24 is a schematic right side view showing an example of a configuration of a front cover according to some embodiments. In the example of FIG. 24, the front cover 300 is rotatably connected to the optical transceiver 200 by a hinge 320. For example, when inserting the optical transceiver 200, the front cover 300 connected to the optical transceiver 200 is lifted up, and the optical transceiver 200 is inserted into the port 101 of the optical transmission device 100. Then, the front cover 300 connected to the optical transceiver 200 is lowered to place the front cover 300 over the front of the optical transceiver 200, and the screws 310 are fastened as in the example above.

[0096] The present disclosure is not limited to the above-described embodiment, and can be modified as appropriate within the scope of the present disclosure.

[0097] Each component in the above-described embodiments may be configured by hardware or software, or both, and may be configured by a single piece of hardware or software, or may be configured by multiple pieces of hardware or software. Each device, such as an optical transmission device or an optical transceiver, and each function (processing) may be realized by a computer 40 having a processor 41 such as a CPU (Central Processing Unit) and a memory 42 serving as a storage device, as shown in Fig. 25. For example, a program for performing the method (control method) in the embodiment may be stored in the memory 42, and each function may be realized by having the processor 41 execute the program stored in the memory 42.

[0098] These programs include instructions (or software code) that, when loaded into a computer, cause the computer to perform one or more functions described in the embodiments. The programs may be stored on a non-transitory computer-readable medium or a tangible storage medium. By way of example and not limitation, computer-readable media or tangible storage media include random-access memory (RAM), read-only memory (ROM), flash memory, solid-state drive (SSD) or other memory technology, CD-ROM, digital versatile disc (DVD), Blu-ray® disc or other optical disk storage, magnetic cassette, magnetic tape, magnetic disk storage or other magnetic storage device. The programs may also be transmitted on a transitory computer-readable medium or communication medium. By way of example and not limitation, transitory computer-readable media or communication media include electrical, optical, acoustic, or other forms of propagated signals.

[0099] Although the present disclosure has been described above with reference to the embodiments, the present disclosure is not limited to the above-described embodiments. Various modifications that can be understood by those skilled in the art can be made to the configuration and details of the present disclosure within the scope of the present disclosure. Furthermore, each embodiment can be combined with other embodiments as appropriate.

[0100] Each drawing is merely an example for describing one or more embodiments. Each drawing may relate not only to one particular embodiment, but also to one or more other embodiments. As will be understood by those skilled in the art, various features or steps described with reference to any one drawing can be combined with features or steps shown in one or more other drawings to create, for example, an embodiment not explicitly shown or described. Not all features or steps shown in any one drawing are necessary to describe an exemplary embodiment, and some features or steps may be omitted. The order of steps described in any drawing may be changed as appropriate.

[0101] A part or all of the above-described embodiments can be described as, but not limited to, the following supplementary notes.

[0102] (Appendix 1) an optical transmission device; an optical transceiver that can be inserted into or removed from a port of the optical transmission device; a cover for covering an exposed portion of the optical transceiver inserted into the port; Equipped with a cover for covering the optical transceiver is detachably fixed to a mounting portion of the optical transmission device by a fixing member; Insertion / extraction structure. (Appendix 2) The optical transmission device includes: a detection unit that detects when removal of the fixing member from the attachment unit has begun; a control unit that executes a necessary process before the optical transceiver is removed based on the detection result; and 2. The insertion / removal structure according to claim 1, comprising: (Appendix 3) the mounting portion is capable of inserting the fixing member; The detection unit detects that the fixing member is in the process of being removed from the attachment unit. The insertion / extraction structure described in Appendix 2. (Appendix 4) the fixing member is a screw, the mounting portion is a screw hole into which the screw is inserted, the detection unit is a switch that detects the presence or absence of the tip of the screw at the bottom of the screw hole. The insertion / extraction structure described in Appendix 3. (Appendix 5) The fixing member includes a first fixing member and a second fixing member that fix the cover at an outer periphery of the opening of the port. An insertion / removal structure according to any one of appendixes 1 to 4. (Appendix 6) The port includes a plurality of terminals for electrical connection; The first fixing member and the second fixing member fix the cover on both sides of the outer periphery of the opening of the port in a direction in which a plurality of terminals of the port are arranged. The insertion / extraction structure described in Appendix 5. (Appendix 7) Inserting a pluggable optical transceiver into a port of an optical transmission device; a cover covering an exposed portion of the optical transceiver inserted into the port; a cover for covering the optical transceiver is detachably fixed to the optical transmission device by a fixing member; Insertion / removal method. (Appendix 8) A port into which an optical transceiver can be inserted and removed; an attachment portion for detachably fixing a cover for covering an exposed portion of the optical transceiver inserted into the port with a fixing member; a detection unit that detects when removal of the fixing member from the attachment unit has begun; a control unit that executes a necessary process before the optical transceiver is removed based on the detection result; and An optical transmission device comprising: (Appendix 9) When a cover covering an exposed portion of an optical transceiver inserted into a port of an optical transmission device is detachably fixed to a mounting portion of the optical transmission device by a fixing member, detecting that removal of the fixing member from the mounting portion has begun; and performing a necessary process before removing the optical transceiver based on the detection result. Control method. (Appendix 10) When a cover covering an exposed portion of an optical transceiver inserted into a port of an optical transmission device is detachably fixed to a mounting portion of the optical transmission device by a fixing member, detecting that removal of the fixing member from the mounting portion has begun; and performing a necessary process before removing the optical transceiver based on the detection result. A control program that causes a computer to execute a process.

[0103] Some or all of the elements (e.g., configurations and functions) described in Supplementary Notes 2 to 6 that are dependent on Supplementary Note 1 (insertion / removal structure) may also be dependent on Supplementary Note 7 (insertion / removal method), Supplementary Note 8 (optical transmission device), Supplementary Note 9 (control method), and Supplementary Note 10 (control program) in the same dependency relationship as Supplementary Note 2 to Supplementary Note 6. Some or all of the elements described in any Supplementary Note may be applied to various hardware, software, recording means for recording software, systems, and methods. [Explanation of symbols]

[0104] 1, 2 Optical transceiver insertion / removal structure 10 Optical transmission equipment 11 ports 12 Mounting part 13 Detection unit 14 Control Unit 20 Optical Transceiver 30 Cover 31 Fixing member 40 Computer 41 processors 42 memory 100 Optical transmission equipment Port 101 110 Terminal section 110a~110f terminals 111 Insertion / removal detection line 112 Feed line 113 Monitoring and control communication line 114 Detection Line 115 Control Line 116, 116a, 116b Lever switch detection wire 120 Insertion / removal detection circuit 130 Power supply circuit 140 Controller 150, 150a, 150b screw holes 151, 151a, 151b female thread 152, 152a, 152b bottom 160, 160a, 160b lever switch 161, 161a, 161b levers 200 Optical Transceiver 210 Terminal section 210a~210f terminals 211 Insertion / removal detection line 212 Feed line 213 Monitoring and control communication line 220 Receiving circuit 230 microcontroller 240 Optical Receptacle 300 Front cover 301 Cover body 302, 302a, 302b fixed part 303, 303a, 303b through hole 310, 310a, 310b screws 311, 311a, 311b head 312, 312a, 312b male thread part 313, 313a, 313b tip 320 Hinge

Claims

1. an optical transmission device; an optical transceiver that can be inserted into or removed from a port of the optical transmission device; a cover for covering an exposed portion of the optical transceiver inserted into the port; Equipped with a cover for covering the optical transceiver is detachably fixed to a mounting portion of the optical transmission device by a fixing member; Insertion / extraction structure.

2. The optical transmission device includes: a detection unit that detects when removal of the fixing member from the attachment unit has begun; a control unit that executes a necessary process before the optical transceiver is removed based on the detection result; and The insertion / extraction structure according to claim 1 , comprising:

3. the mounting portion is capable of inserting the fixing member; The detection unit detects that the fixing member is in the process of being removed from the attachment unit. The insertion / removal structure according to claim 2.

4. the fixing member is a screw, the mounting portion is a screw hole into which the screw is inserted, the detection unit is a switch that detects the presence or absence of the tip of the screw at the bottom of the screw hole. The insertion / removal structure according to claim 3.

5. the fixing member includes a first fixing member and a second fixing member that fix the cover around an outer periphery of the opening of the port; The insertion / removal structure according to any one of claims 1 to 4.

6. The port includes a plurality of terminals for electrical connection; the first fixing member and the second fixing member fix the cover on both sides of the outer periphery of the opening of the port in a direction in which a plurality of terminals of the port are arranged; The insertion / removal structure according to claim 5.

7. Inserting a pluggable optical transceiver into a port of an optical transmission device; a cover covering an exposed portion of the optical transceiver inserted into the port; a cover for covering the optical transceiver is detachably fixed to the optical transmission device by a fixing member; Insertion / removal method.

8. A port into which an optical transceiver can be inserted and removed; an attachment portion for detachably fixing a cover for covering an exposed portion of the optical transceiver inserted into the port with a fixing member; a detection unit that detects when removal of the fixing member from the attachment unit has begun; a control unit that executes a necessary process before the optical transceiver is removed based on the detection result; and An optical transmission device comprising:

9. When a cover covering an exposed portion of an optical transceiver inserted into a port of an optical transmission device is detachably fixed to a mounting portion of the optical transmission device by a fixing member, detecting that removal of the fixing member from the mounting portion has begun; and performing a necessary process before removing the optical transceiver based on the detection result. Control method.

10. When a cover covering an exposed portion of an optical transceiver inserted into a port of an optical transmission device is detachably fixed to a mounting portion of the optical transmission device by a fixing member, detecting that removal of the fixing member from the mounting portion has begun; and performing a necessary process before removing the optical transceiver based on the detection result. A control program that causes a computer to execute a process.

Images