JP7218527B2 - Optical transmission device, optical transmission system, and control method for optical transmission device - Google Patents

Description

The present invention relates to optical communication technology, and more particularly to technology for monitoring the status of optical transceivers.

2. Description of the Related Art Pluggable optical transceivers are increasingly being used in optical transmission devices accommodated in data centers, office buildings, and the like. In order to stably operate an optical communication system, it is necessary to monitor the operational status of optical transceivers connected to optical transmission equipment. The operating state of the pluggable optical transceiver is monitored by, for example, communication between the optical transceiver and the optical transmission device through a communication bus for control. However, when the number of installed optical transceivers increases, congestion may occur in the communication bus, and it may take time to monitor the operating state. Therefore, it is necessary to suppress the amount of data communication via the communication bus as much as possible. Therefore, it is desirable to have a technique that can suppress the amount of communication through the communication bus and monitor the state of the optical transceiver. For example, Japanese Patent Application Laid-Open No. 2002-300002 discloses a technique for monitoring an optical transceiver while suppressing the amount of communication on a communication bus.

Patent document 1 relates to a pluggable optical transceiver having a function of storing monitoring information. The optical transceiver of Patent Literature 1 has a correspondence table showing correspondence between presumed causes of failure in equipment and monitoring results, and stores the presumed causes of failure in a memory. In Patent Document 1, it is possible for an operator to investigate the cause of a failure in a short time by reading the data of the cause of the failure from the memory.

JP 2014-107676 A

However, the technique of Patent Document 1 is not sufficient in the following respects. In Patent Document 1, failure cause data stored in a memory of an optical transceiver is read out during analysis. Therefore, when the state of the optical transceiver changes due to an abnormality or the like occurring in the optical transceiver, the state change cannot be grasped immediately. Therefore, the technique of Patent Document 1 is insufficient as a technique for grasping changes in the state of the optical transceiver without delay.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide an optical transmission apparatus capable of detecting changes in the state of an optical transceiver without delay.

In order to solve the above problems, the optical transmission device of the present invention comprises connection means, power supply means, acquisition means, and control means. The connecting means has a connector for connecting the optical transceiver, and connects the optical transceiver via the connector. A power supply means supplies power to the optical transceiver through the connector. The acquisition means acquires information on power supplied to the optical transceiver through the connector. The monitoring means monitors the state of the optical transceiver based on the power information.

A control method of the present invention connects an optical transceiver to a connector for connecting an optical transceiver via a connector. The control method of the present invention supplies power to the optical transceiver through the connector. The control method of the present invention acquires information on the power supplied to the optical transceiver through the connector. The control method of the present invention monitors the state of the optical transceiver based on power information.

According to the present invention, changes in the state of the optical transceiver can be detected without delay.

1 is a diagram showing an overview of the configuration of a first embodiment of the present invention; FIG. FIG. 5 is a diagram showing an overview of the configuration of a second embodiment of the present invention; It is a figure which shows the structure of the control part of the 2nd Embodiment of this invention. FIG. 10 is a diagram showing an overview of the configuration of a third embodiment of the present invention; It is a figure which shows the structure of the control part of the 3rd Embodiment of this invention. It is a figure which shows the outline|summary of a structure of the 4th Embodiment of this invention. It is a figure which shows the structure of the control part of the 4th Embodiment of this invention.

(First embodiment)
A first embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 shows the outline of the configuration of the optical transmission device of this embodiment. The optical transmission device 1 of this embodiment includes a connection means 2 , a power supply means 3 , an acquisition means 4 and a monitoring means 5 . The connecting means 2 has a connector for connecting an optical transceiver, and connects the optical transceiver via the connector. Power supply means 3 supplies power to the optical transceiver through the connector. Acquisition means 4 acquires information on power supplied to the optical transceiver through the connector. A monitoring means 5 monitors the state of the optical transceiver based on the power information.

In the optical transmission device 1 of this embodiment, the acquisition means 4 acquires information on the power supplied from the power supply means 3 to the optical transceiver connected to the connection means 2 . Further, in the optical transmission device 1 of the present embodiment, the monitoring means 5 monitors the state of the optical transceiver based on the power information obtained by the obtaining means 4 . By monitoring the optical transceiver based on the power supplied to the optical transceiver in this manner, the optical transmission device 1 of the present embodiment detects a change in the state of the optical transceiver based on a change in the power supplied. can do. Also, by monitoring the optical transceiver based on the power supplied to the optical transceiver, the communication bus or the like does not become rate limiting. Therefore, when the state of the connected optical transceiver changes, the optical transmission device 1 of this embodiment can detect the state change without taking time based on the power change. Therefore, the optical transmission device 1 of this embodiment can detect changes in the state of the optical transceiver without delay.

(Second embodiment)
A second embodiment of the present invention will be described in detail with reference to the drawings. FIG. 2 shows an overview of the configuration of the optical transmission device 10 of this embodiment. The optical transmission device 10 of this embodiment is a communication device that includes a plurality of optical transceivers and performs transmission and reception of wavelength multiplexed signals with other optical transmission devices via an optical communication network.

The optical transmission device 10 of this embodiment includes an optical transceiver 11 , a current measuring section 12 , a control section 13 and a power supply section 14 . There are N optical transceivers 11 from optical transceiver 11-1 to optical transceiver 11-N (N is a positive integer). Each optical transceiver 11 is a pluggable optical transceiver connected to an optical transmission device via a connector 100 . N current measuring units 12 are provided from current measuring units 12-1 to 12-N so as to correspond to the optical transceivers 11, respectively.

The optical transceiver 11 has a function of transmitting and receiving optical signals. The optical transceiver 11 includes a light source, a modulator, a photodiode, a signal processing circuit, and the like, and operates based on power supplied from the power supply section 14 . The optical transceiver 11 transmits and receives optical signals based on signals input/output from the optical transmission device 10 .

The current measurement unit 12 has a function of acquiring a current value supplied to each optical transceiver 11 . The current measurement units 12 are provided on power lines that supply power from the power supply unit 14 to each optical transceiver 11 . The current measurement unit 12 measures the current flowing through the power line and outputs the measurement result to the control unit 13 . The function of the current measurement unit 12 of this embodiment corresponds to the acquisition unit 4 of the first embodiment.

A configuration of the control unit 13 will be described. FIG. 3 shows the configuration of the control unit 13 of this embodiment. The control unit 13 of this embodiment includes a power supply control unit 111 and a current value acquisition unit 112 .

The power supply control unit 111 controls the power supply unit 14 based on the operating state of the optical transceiver 11 . The power control unit 111 determines the state of each optical transceiver 11 based on the measurement result of the current supplied to each optical transceiver 11 acquired via the current value acquiring unit 112 .

The power control unit 111 outputs to the power supply unit 14 a signal indicating to stop the power supply when the current value supplied to the optical transceiver 11 does not satisfy a predetermined standard. When the current value does not satisfy a predetermined standard, the power control unit 111 is configured to output a signal indicating that an abnormality has occurred in the optical transceiver 11 to a management system or the like connected to the optical transmission device 10 . It can be.

The current value acquisition unit 112 acquires the measurement result of the current value of the current supplied from each current measurement unit 12 to each optical transceiver 11 . Also, the function of the control unit 13 of this embodiment corresponds to the monitoring means 5 of the first embodiment.

The control unit 13 is configured using a semiconductor device such as an FPGA (Field Programmable Gate Array), for example. The control unit 13 may perform each process by executing a program in a general-purpose processor such as a CPU (Central Processing Unit).

The power supply unit 14 supplies power to each optical transceiver 11 through a power supply line. Each optical transceiver 11 is connected in parallel to the power supply section 14 . The power supply unit 14 supplies power to each optical transceiver 11 based on power supplied from the outside. Also, the function of the power supply unit 14 of this embodiment corresponds to the power supply unit 3 of the first embodiment.

A connector 100 is provided as a connecting portion for connecting the optical transceiver 11 . The connector 100 has a signal line for inputting/outputting a signal transmitted/received by the optical transceiver 11, a power supply line, a communication bus for inputting/outputting a control signal, and the like. Also, the function of the connector 100 of this embodiment corresponds to the connection means 2 of the first embodiment.

The operation of the optical transmission device 10 of this embodiment will be described. When the optical transmission device 10 starts operating, the control unit 13 sends a signal to start supplying power to the power supply unit 14 . Upon receiving a signal to start supplying power, the power supply unit 14 supplies power to each optical transceiver 11 through the power line connected to each optical transceiver 11 based on an external power supply. Each optical transceiver 11 is connected in parallel to the power supply section 14 . A current measurement unit 12 provided in each power line measures the current flowing through the power line and sends the measurement result to the current value acquisition unit 112 of the control unit 13 .

When the data of the measurement result of the current flowing through each power supply line is received via the current value acquisition unit 112, the control unit 13 determines whether or not the optical transceiver 11 is abnormal based on the measurement result of the current value in the power supply control unit 111. It is compared with a predetermined reference value to be used. The control unit 13 identifies the current measuring unit 12 that is the transmission source of the measurement result based on the correspondence between the power supply line and the signal line through which the measurement result is transmitted. Since the current measuring unit 12 is provided for each connecting portion of the optical transceiver 11, the control unit 13 can determine to which position the measurement result indicates the current value of the optical transceiver 11 connected. can be done.

A predetermined criterion for determining whether or not the optical transceiver 11 is abnormal is set based on an upper limit value and a lower limit value indicating a range of current values in which the optical transceiver 11 is operating normally. When the measurement results are within the predetermined criteria, the control unit 13 continues monitoring the measurement results.

When the measurement result is out of the predetermined reference range, the power control section 111 of the control section 13 sends a signal to stop the power supply to the power section 14 . Upon receiving the signal to stop the supply of power, the power supply unit 14 stops the supply of power.

Further, the control unit 13 may output identification information of the current measuring unit 12 in which an abnormality has occurred and a signal indicating that an abnormality has occurred to a monitoring device or the like connected to the optical transmission device 10 . As the identification information of the current measurement unit 12, for example, identifier information assigned to each current measurement unit 12 is used. A monitoring device or the like that receives the identification information of the current measuring unit 12 in which an abnormality has occurred and the signal indicating that an abnormality has occurred determines whether the abnormality has occurred based on the relationship between the identification information of the current measuring unit 12 and the optical transceiver 11 . The optical transceiver 11 that is present is determined, and the operator or the like is notified.

The optical transmission device 10 of this embodiment controls the power supply based on the measurement result of the current supplied to each optical transceiver 11. Power supply control may be performed based on the average value. Also, the power supply may be stopped and started for each optical transceiver 11 . With such a configuration, the accuracy of controlling the power supply to the optical transceiver 11 is further improved.

The optical transmission device 10 of this embodiment determines the state of the optical transceiver 11 by monitoring the current supplied to the optical transceiver 11 in the current measuring unit 12 in the optical transmission device 10 . The power supplied to each optical transceiver 11 is proportional to the power consumption in each optical transceiver 11 . Therefore, when the state of the optical transceiver 11 changes and the power consumption changes, the current value of the current supplied to each optical transceiver 11 changes. Therefore, by measuring the current value of the current supplied to each optical transceiver 11, the change in the state of the optical transceiver 11 can be detected.

The optical transmission device 10 of the present embodiment monitors the current supplied to the optical transceiver 11 by the current measuring unit 12 in the optical transmission device 10 , so that the optical transmission device 10 detects the light without passing through a communication bus or the like connected to the optical transceiver 11 . The status of transceiver 11 can be monitored. Further, the optical transmission device 10 of this embodiment can detect changes in the state of the optical transceiver 11 in a short period of time based on changes in the current value supplied to the optical transceiver 11 . Therefore, the optical transmission device 10 of this embodiment can quickly determine the state of the optical transceiver 11 such as an abnormality, and can control the power supply unit 14 . As a result, the optical transmission device 10 of this embodiment can detect changes in the state of the optical transceiver 11 without delay.

(Third embodiment)
A third embodiment of the present invention will be described in detail with reference to the drawings. FIG. 4 shows an overview of the configuration of the optical transmission device 20 of this embodiment. The optical transmission apparatus of the second embodiment stops the supply of power to the optical transceiver when an abnormality of the optical transceiver is detected based on a change in the current value. In addition to such a configuration, the optical transmission device of this embodiment is characterized by controlling cooling within the device based on the current value supplied to the optical transceiver.

The optical transmission device 20 of this embodiment includes an optical transceiver 21 , a current measuring section 22 , a control section 23 , a power supply section 24 and a cooling section 25 . There are N optical transceivers 21 from optical transceiver 21-1 to optical transceiver 21-N (N is a positive integer). Each optical transceiver 21 is connected to the optical transmission device 20 via a connector 100 . The configuration and function of the connector 100 of this embodiment are the same as those of the connector 100 of the second embodiment. N current measuring units 22 are provided from current measuring units 22-1 to 22-N so as to correspond to the optical transceivers 21, respectively.

The configurations and functions of the optical transceiver 21 and the current measuring unit 22 of the present embodiment are the same as those of the same-named portions of the second embodiment.

A configuration of the control unit 23 will be described. FIG. 5 shows the configuration of the control section 23 of this embodiment. The control unit 23 of this embodiment includes a power supply control unit 121 , a current value acquisition unit 122 and a cooling control unit 123 . The configurations and functions of the power supply control unit 121 and the current value acquisition unit 122 of the control unit 23 of the present embodiment are the same as those of the parts with the same names of the second embodiment.

The cooling control section 123 of the control section 23 has a function of controlling the cooling section 25 based on the measurement result of the current value supplied to the optical transceiver 21 . The cooling control unit 123 controls the rotation speed of the fan of the cooling unit 25 based on the measurement result of the current value supplied to the optical transceiver 21 . The cooling control unit 123 determines the rotation speed of the fan of the cooling unit 25 based on the average value of the current values sent from each current measurement unit 22 via the current value acquisition unit 122, and determines the rotation speed of the fan. is sent to the cooling unit 25. The cooling control unit 123 of the control unit 23 stores in advance data indicating the relationship between the average current value and the rotation speed of the fan of the cooling unit 25 . The cooling control unit 123 of the control unit 23 may control the rotation speed of the fan of the cooling unit 25 based on the amount of change in the current value.

The power supply control unit 121 of the control unit 23 controls stopping of the power supply of the power supply unit 24 based on the reference of the current value for detecting the operation abnormality of the optical transceiver 21 as in the second embodiment. Further, the current value acquisition unit 122 calculates the average value of the current values sent from each current measurement unit 22 .

The cooling unit 25 cools the inside of the optical transmission device 20 based on the control of the cooling control unit 123 of the control unit 23 . The cooling unit 25 of this embodiment is configured using an air cooling system using a fan. When the cooling unit 25 receives information about the number of revolutions of the fan from the cooling control unit 123, the cooling unit 25 controls the rotation of the fan so as to achieve the received number of revolutions.

The operation of the optical transmission device 20 of this embodiment will be described. When the optical transmission device 20 starts operating, the power control unit 121 of the control unit 23 sends a signal to start supplying power to the power supply unit 24 . Upon receiving a signal to start supplying power, the power supply unit 24 supplies power to each optical transceiver 21 through the power line connected to each optical transceiver 21 based on an external power supply. Each optical transceiver 21 is connected in parallel to the power supply section 24 . A current measurement unit 22 provided in each power line measures the current flowing through the power line and sends the measurement result to the current value acquisition unit 122 of the control unit 23 .

When the current value acquisition unit 122 receives the data of the measurement result of the current flowing through each power supply line, the current value acquisition unit 122 calculates the average value of the measurement results sent from each current measurement unit 22 . When the average value of the current measurement results is produced, the cooling control unit 123 determines the rotation speed of the fan of the cooling unit 25 from the calculated average value. After determining the rotation speed of the fan, the cooling control unit 123 sends a signal indicating the rotation speed of the fan to the cooling unit 25 . When the cooling unit 25 receives information about the number of revolutions of the fan from the cooling control unit 123, the cooling unit 25 controls the rotation of the fan so as to achieve the received number of revolutions. When the fan of the cooling unit 25 rotates, the inside of the optical transmission device 20 is cooled.

Also, the power control unit 121 of the control unit 23 compares the current value measurement result with a predetermined reference value for determining whether the optical transceiver 21 is abnormal. When the measurement result is out of the predetermined reference range, the power control unit 121 sends a signal to stop the power supply to the power supply unit 24 . Upon receiving the signal to stop the supply of power, the power supply unit 24 stops the supply of power. The optical transmission device 20 of this embodiment cools the inside of the device when the power consumption in the optical transceiver 21 increases, and when the power consumption further increases, it is determined that an abnormality has occurred and the power supply to the optical transceiver 21 is turned off. supply has been stopped. By performing such control, the optical transmission device 20 of this embodiment can operate more stably.

Although the optical transmission device 20 of this embodiment includes only one cooling unit 25 , it may include a plurality of cooling units 25 . When a plurality of cooling units 25 are provided, the number of operating cooling units 25 may be changed according to the measured current value. Also, the cooling unit 25 may be provided so as to correspond to each optical transceiver 21 . When the cooling unit 25 is provided so as to correspond to the optical transceiver 21, the cooling control unit 123 of the control unit 23 controls the operation of the cooling unit 25 based on the current measurement result for each optical transceiver 21. may

The optical transmission device 20 of this embodiment measures the current supplied to the optical transceiver 21 by the current measurement unit 22 in the optical transmission device 20, and controls the cooling unit 25 based on the measurement result. The optical transmission device 20 of this embodiment responds to changes in the state of the optical transceiver 21 in a short period of time based on changes in the current value supplied to the optical transceiver 21, and changes the rotation speed of the fan in the cooling unit 25. be able to. Therefore, the optical transmission device 20 of this embodiment can control the cooling unit 25 without being delayed by changes in the operating state of the optical transceiver 21 .

(Fourth embodiment)
A fourth embodiment of the present invention will be described in detail with reference to the drawings. FIG. 6 shows an overview of the configuration of the optical transmission device 30 of this embodiment. While the optical transmission device of the third embodiment measures the current value of the current flowing through the power supply line, the optical transmission device of this embodiment measures the current value based on the voltage drop measurement results across the connector. It is characterized by calculating.

The optical transmission device 30 of this embodiment includes an optical transceiver 31 , a voltage measuring section 32 , a control section 33 , a power supply section 34 and a cooling section 35 . There are N optical transceivers 31 from optical transceiver 31-1 to optical transceiver 31-N (N is a positive integer). Each optical transceiver 31 is connected to the optical transmission device 30 via a connector 101 . Further, N voltage measurement units 32 are provided from voltage measurement units 32-1 to 32-N so as to correspond to the optical transceivers 31, respectively.

The configurations and functions of the power supply unit 34 and the cooling unit 35 are the same as those of the parts with the same names in the second embodiment.

The optical transceiver 31 has the same configuration and functions as the optical transceiver 11 of the second embodiment. The optical transceiver 31 has the same configuration as that of the second embodiment, and is connected to wiring for measuring the voltage difference before and after the connector 101 for connection with the optical transmission device 30 .

The voltage measurement unit 32 measures the voltage difference before and after the connector 101 . The voltage measurement unit 32 sends the voltage difference measurement result to the control unit 33 . The voltage measuring unit 32 is connected to a power line on the optical transmission device 30 side of the connector 100 and a power line on the inner side of the optical transceiver 31 rather than the connector 101 .

A configuration of the control unit 33 will be described. FIG. 7 shows the configuration of the control section 33 of this embodiment. The control unit 33 includes a power supply control unit 131 , a current value calculation unit 132 and a cooling control unit 133 . The configurations and functions of the power control unit 131 and the cooling control unit 133 of the present embodiment are the same as those of the parts with the same names of the third embodiment.

The current value calculator 132 calculates the value of the current flowing through the power supply line based on the measurement result of the voltage difference input from each voltage measurement unit 32 . The current value calculator 132 calculates a voltage drop value as a voltage difference input from each voltage measurement unit 32, and calculates a current value. The current value calculator 132 stores the contact resistance value of the connector 101 in advance. The power control unit 131 and the cooling control unit 133 determine the state of each optical transceiver 31 based on the current value calculated by the current value calculation unit 132 . The power supply control unit 131 determines the operating state of the optical transceiver 31 based on the current value calculated by the current value calculation unit 132 and controls the power supply unit 34 . The cooling control unit 133 determines the operating state of the optical transceiver 31 based on the current value calculated by the current value calculation unit 132 and controls the cooling unit 35 .

A connector 101 is provided as a connecting portion for connecting the optical transceiver 31 . The connector 101 has a signal line for inputting/outputting a signal transmitted/received by the optical transceiver 31, a power line, a communication bus for inputting/outputting a control signal, and the like. The connector 101 also has wiring for measuring the voltage difference of the power line before and after passing through the connector 101 .

The operation of the optical transmission device 30 of this embodiment will be described. When the optical transmission device 30 starts operating, the power control unit 131 of the control unit 33 sends a signal to start supplying power to the power supply unit 34 . Upon receiving a signal to start supplying power, the power supply unit 34 supplies power to each optical transceiver 31 through the power line connected to each optical transceiver 31 based on an external power supply.

When the power supply starts, the voltage measuring section 32 provided for each power line measures the voltage difference between before and after the connector 100 and sends the measurement result to the current value calculating section 132 of the control section 33 .

Upon receiving the measurement result of the voltage difference corresponding to the voltage drop across the connector 101 of each power supply line, the current value calculator 132 calculates the current value from the voltage difference. After calculating the current values, the current value calculation unit 132 calculates the average value of the current values calculated from the measurement results of the voltage measurement units 32 .

When the average value of the current measurement results is calculated, the cooling control unit 133 determines the rotation speed of the fan of the cooling unit 35 from the average value calculated by the current value calculation unit 132 . After determining the rotation speed of the fan, the cooling control unit 133 sends a signal indicating the rotation speed of the fan to the cooling unit 35 . When the cooling unit 35 receives information about the number of revolutions of the fan from the cooling control unit 133, the cooling unit 35 controls the rotation of the fan so as to achieve the received number of revolutions. When the fan of the cooling unit 35 rotates, the inside of the optical transmission device 30 is cooled.

Also, the power control unit 131 of the control unit 33 compares the current value calculated by the current value calculation unit 132 with a predetermined reference value for determining whether the optical transceiver 31 is abnormal. When the calculated current value is out of the predetermined reference range, the power control unit 131 sends a signal to stop the power supply to the power supply unit 34 . Upon receiving the signal to stop the supply of power, the power supply unit 34 stops the supply of power.

The optical transmission device 30 of this embodiment calculates the current value of the current supplied to the optical transceiver 31 based on the voltage drop across the connector, and controls the cooling unit 35 based on the calculated current value. As in the third embodiment, the optical transmission device 30 of the present embodiment responds to changes in the state of the optical transceiver 31 in a short period of time based on changes in the current value supplied to the optical transceiver 31, and cools down the cooling unit. The speed of the fan at 35 can be changed. Therefore, the optical transmission device 30 of this embodiment can control the cooling unit 35 without being delayed by changes in the operating state of the optical transceiver 31 .

In the optical transmission devices of the third and fourth embodiments, the cooling unit is controlled based on changes in the power supplied to the optical transceiver. may be performed. In such a configuration, the current value that serves as a criterion for control and monitoring is set according to the object to be controlled and the object to be controlled. Further, in the optical transmission device of each embodiment, insertion/removal of the optical transceiver may be detected based on changes in current or voltage supplied to the optical transceiver.

The optical transmission device of each embodiment performs monitoring and control based on the result of comparing the current value with a reference. Monitoring and control may be performed based on the measurement results of . By adopting such a configuration, it is possible to cope with a case where the state of the optical transceiver suddenly changes while the measured value such as the current value is within the reference, so that the accuracy of monitoring and control can be further improved. can be done.

1 Optical Transmission Device 2 Connection Means 3 Power Supply Means 4 Acquisition Means 5 Monitoring Means 10 Optical Transmission Device 11 Optical Transceiver 12 Current Measurement Unit 13 Control Unit 14 Power Supply Unit 20 Optical Transmission Device 21 Optical Transceiver 22 Current Measurement Unit 23 Control Unit 24 Power Supply Unit 25 Cooling Unit 30 Optical Transmission Device 31 Optical Transceiver 32 Voltage Measuring Unit 33 Control Unit 34 Power Supply Unit 35 Cooling Unit 100 Connector 101 Connector 111 Power Control Unit 112 Current Value Acquisition Unit 121 Power Control Unit 122 Current Value Acquisition Unit 123 Cooling Control Unit 131 power control unit 132 current value calculation unit 133 cooling control unit

Claims (6)

a connecting means having a connector for connecting an optical transceiver, and connecting the optical transceiver via the connector;
power supply means for supplying power to the optical transceiver through the connector;
By measuring a voltage difference before and after passing through the connector and calculating a current value based on the voltage difference and the contact resistance of the connector, information on power supplied to the optical transceiver via the connector is obtained. an acquisition means for acquiring;
and monitoring means for monitoring the state of the optical transceiver based on the power information. a cooling means for cooling by rotation of a fan;
2. The optical transmission device according to claim 1 , further comprising cooling control means for controlling rotation of said fan based on said power information obtained by said obtaining means. Further comprising power control means for stopping the power supply from the power supply means when it is detected based on the power information that the power supplied to the optical transceiver is equal to or higher than a preset standard. 3. The optical transmission device according to claim 1 or 2 . a plurality of optical transceivers;
The optical transmission device according to any one of claims 1 to 3 ,
The optical transmission system, wherein the monitoring means acquires information on the power supplied to each of the plurality of optical transceivers, and monitors the state of each of the optical transceivers based on the information on the power. A control method for an optical transmission device having a connector for connecting an optical transceiver, comprising:
supplying power to the optical transceiver connected via the connector;
Power supplied to the optical transceiver connected via the connector by measuring a voltage difference before and after passing through the connector and calculating a current value based on the voltage difference and the contact resistance of the connector. get information about
A control method for an optical transmission device, wherein the state of the optical transceiver is monitored based on the power information. controlling the rotation of the fan based on the power information;
6. The method of controlling an optical transmission device according to claim 5 , wherein the inside of the device is cooled by rotation of the fan.

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