Optical fiber power supply management circuit and method and FTTR equipment

Abstract

The invention provides an optical fiber power supply management circuit and method and FTTR equipment, and relates to the technical field of optical fiber power supply. In the application, the optical fiber power supply management circuit comprises a power supply module, the positive electrode of the input side of an optical fiber power supply interface module is connected with the positive electrode of the power supply module, and the output side of the optical fiber power supply interface module is connected with a sub-gateway through a photoelectric composite cable; the positive electrode of the power supply control switch module is connected with the negative electrode of the input side of the optical fiber power supply interface module, and the negative electrode of the power supply control switch module is connected with the negative electrode of the power supply module; when power needs to be supplied to the sub-gateway, the power supply control switch module controls the positive electrode and the negative electrode to be conducted, and a power supply loop is formed. When the sub-gateway does not need to be powered, the power supply control switch module controls the positive electrode and the negative electrode to be switched off, the power supply loop is switched off, and power supply to the sub-gateway is stopped. On the basis of the content, the problem that in the prior art, the safety of optical fiber power supply is relatively low can be solved.

Description

Technical Field

[0001] The present application relates to the field of optical fiber power supply technology, and more specifically, to an optical fiber power supply management circuit, method, and FTTR equipment. Background Art

[0002] Fiber to the Room (FTTR) technology is an innovative solution for deploying intranets in homes and small businesses. It replaces traditional network cables with optical fiber, extending fiber to every individual space. Optical network terminals (ONTs) are deployed to seamlessly connect to a primary gateway in the home. The corresponding FTTR system primarily consists of a master gateway, slave gateways, and similarly functioning routers. These components can be connected via fiber, wired networks, or wireless networks for flexible networking. Typically, the master gateway is deployed at the user's access point, such as a low-voltage power distribution box, and connects to the operator's fiber access point to access services. Sub-gateways are deployed at user terminals, such as bedrooms, and connect to the downlink optical port of the master gateway via fiber. Multiple sub-gateways are required to meet coverage requirements. Therefore, each sub-gateway must first be connected to the output of an optical splitter, which then connects to the input of the main gateway. Passive optical splitters can be used for optical connectivity, requiring each sub-gateway to be independently powered.

[0003] To address complex application environments and the difficulty of obtaining power for sub-gateways, Power Over Fiber (POF) technology has been developed. Existing POF power systems typically use active optical splitters (AOSs) to simultaneously provide power and transmit optical signals. AOSs typically use a 48V to 56V DC direct power source or a dedicated Power over Ethernet (PSE) chip to provide power. A powered device (PD) is added to the sub-gateway. Therefore, for devices requiring PoF power, the optical splitter must also provide power, necessitating an active optical splitter (AOS), also known as an active optical splitter (AOS). However, direct powering in AOSs, where DC power is directly applied to the Power Over Fiber (POF) line and then directly connected to the sub-gateway, poses a relatively low security risk due to the difficulty in effectively controlling the power supply. Summary of the Invention

[0004] In view of this, the purpose of this application is to provide a fiber optic power supply management circuit, method and FTTR equipment to improve the problem of relatively low security of fiber optic power supply in the prior art.

[0005] To achieve the above object, the application adopts the following technical scheme: An optical fiber power supply management circuit is applied to an FTTR device, the FTTR device comprising a main gateway, an optical splitter, an optical fiber power supply interface module and a sub-gateway, the main gateway providing optical fiber signals for the sub-gateway through the optical splitter and the optical fiber power supply interface module, wherein the optical fiber power supply management circuit comprises: a power supply module, wherein the positive pole of the input side of the optical fiber power supply interface module is connected with the positive pole of the power supply module, and the output side of the optical fiber power supply interface module is connected with the sub-gateway through an optical-electrical composite cable to supply power and provide optical fiber signals for the sub-gateway; a power supply control switch module, wherein the positive pole of the power supply control switch module is connected with the negative pole of the input side of the optical fiber power supply interface module, and the negative pole of the power supply control switch module is connected with the negative pole of the power supply module; wherein when power supply is needed for the sub-gateway, the power supply control switch module controls the positive pole and the negative pole to be turned on, so that the positive pole of the power supply module, the positive pole of the input side of the optical fiber power supply interface module, the positive pole of the output side of the optical fiber power supply interface module, the positive pole of the sub-gateway, the negative pole of the sub-gateway, the negative pole of the output side of the optical fiber power supply interface module, the negative pole of the input side of the optical fiber power supply interface module, the positive pole of the power supply control switch module, the negative pole of the power supply control switch module and the negative pole of the power supply module form a power supply loop; when power supply is not needed for the sub-gateway, the power supply control switch module controls the positive pole and the negative pole to be turned off, so that the power supply loop is disconnected and the power supply for the sub-gateway is stopped.

[0006] In the preferred selection of the application, in the above optical fiber power supply management circuit, the optical fiber power supply management circuit further comprises: an output overcurrent detection module, wherein the positive pole of the output overcurrent detection module is connected with the negative pole of the power supply control switch module, and the negative pole of the output overcurrent detection module is connected with the negative pole of the power supply module; an output overcurrent protection module, wherein the input end of the output overcurrent protection module is connected with the overcurrent detection signal output end of the output overcurrent detection module, and the output end of the output overcurrent protection module is connected with the control end of the power supply control switch module; wherein when the overcurrent detection signal output from the overcurrent detection signal output end represents that there is an overcurrent condition, the output overcurrent protection module outputs an overcurrent protection signal for controlling the positive pole and the negative pole of the power supply control switch module to be turned off in response to the overcurrent detection signal.

[0007] In the preferred selection of the application, in the above optical fiber power supply management circuit, the optical fiber power supply management circuit further comprises: A current detection module, wherein a detection terminal of the current detection module is connected to the positive electrode of the output overcurrent detection module or the negative electrode of the power supply control switch module; a control module, wherein a current detection input terminal of the control module is connected to an output terminal of the current detection module, and is configured to obtain a current detected by the current detection module and output a corresponding control signal based on a relationship between the current and a preset current control condition; A control signal driving module, wherein the input end of the control signal driving module is connected to the output end of the control module, and the output end of the control signal driving module is connected to the control end of the power supply control switch module, for obtaining the control signal output by the control module, and outputting a driving signal to the power supply control switch module based on the control signal to drive the positive and negative poles of the power supply control switch module to be in an on or off state.

[0008] In a preferred embodiment of the present application, in the above-mentioned optical fiber power supply management circuit, the optical fiber power supply management circuit further includes: A sub-gateway handshake detection module, wherein the input end of the sub-gateway handshake detection module is connected to the positive pole of the power supply control switch module or the negative pole of the input side of the optical fiber power supply interface module, and the output end of the sub-gateway handshake detection module is connected to the handshake detection input end of the control module, so that the control module is also used to analyze the state of the sub-gateway connected to the optical fiber power supply interface module based on the signal output by the sub-gateway handshake detection module in response to the detected handshake detection signal, and based on the state, drive the positive pole and negative pole of the power supply control switch module to be in an on or off state through the control signal driving module.

[0009] In a preferred embodiment of the present application, in the above-mentioned optical fiber power supply management circuit, the optical fiber power supply management circuit further includes: A port protection module, wherein the power supply positive electrode of the port protection module is connected to the positive electrode of the power supply module, the output positive electrode of the port protection module is connected to the positive electrode of the input side of the optical fiber power supply interface module, the output negative electrode of the port protection module is connected to the negative electrode of the input side of the optical fiber power supply interface module, and the load end negative electrode of the port protection module is connected to the positive electrode of the power supply control switch module. When power needs to be supplied to the sub-gateway, the direction of the current is the positive electrode of the power supply module, the power supply positive electrode of the port protection module, the output positive electrode of the port protection module, the positive electrode of the input side of the optical fiber power supply interface module, the positive electrode of the output side of the optical fiber power supply interface module, the positive electrode of the sub-gateway, the negative electrode of the sub-gateway, the negative electrode of the output side of the optical fiber power supply interface module, the negative electrode of the input side of the optical fiber power supply interface module, the output negative electrode of the port protection module, the negative electrode of the load end of the port protection module, the positive electrode of the power supply control switch module, the negative electrode of the power supply control switch module, and the negative electrode of the power supply module. When the output side of the optical fiber power supply interface module is not connected to the sub-gateway, at least some of the electrical components inside the sub-gateway handshake detection module, at least some of the electrical components inside the port protection module, and the positive and negative electrodes of the power supply module form a communication loop, and the level of the signal output by the sub-gateway handshake detection module is a first value, so that the control module determines, based on the signal, that the output side of the optical fiber power supply interface module is not connected to the sub-gateway.

[0010] In a preferred option of the present application, in the above-mentioned optical fiber power supply management circuit, when a sub-gateway that meets the Ethernet standard is connected to the output side of the optical fiber power supply interface module, the characteristic resistor in the sub-gateway, at least part of the electrical components inside the sub-gateway handshake detection module, and the positive and negative poles of the power supply module form a connecting loop, and the level of the signal output by the sub-gateway handshake detection module is a second value, so that the control module determines based on the signal that the output side of the optical fiber power supply interface module is connected to a sub-gateway and meets the Ethernet standard.

[0011] In a preferred option of the present application, in the above-mentioned optical fiber power supply management circuit, when a sub-gateway is connected to the output side of the optical fiber power supply interface module and the sub-gateway meets the Ethernet standard, the characteristic resistor in the sub-gateway, at least part of the electrical components inside the sub-gateway handshake detection module, and the positive and negative poles of the power supply module form a connected loop, and the level of the signal output by the sub-gateway handshake detection module is a third value, so that the control module determines based on the signal that a sub-gateway is connected to the output side of the optical fiber power supply interface module and does not meet the Ethernet standard.

[0012] In a preferred embodiment of the present application, in the above-mentioned optical fiber power supply management circuit, the optical fiber power supply management circuit further includes: An input overcurrent protection module, wherein the positive electrode of the input overcurrent protection module is connected to the negative electrode of the power supply module, and the negative electrode of the input overcurrent protection module is connected to the positive power supply electrode of the port protection module; A voltage detection module, wherein the input end of the voltage detection module is connected to the negative pole of the input overcurrent protection module or the positive power supply pole of the port protection module, the output end of the voltage detection module is connected to the voltage detection input end of the control module, and the control module is further used to drive the positive pole and negative pole of the power supply control switch module to be in an on or off state through the control signal driving module based on the voltage detection signal input from the voltage detection input end.

[0013] On the basis of the above, the present application also provides a fiber optic power supply management method, which is applied to the control module included in the above fiber optic power supply management circuit. The fiber optic power supply management circuit also includes a power supply module, a voltage detection module, an input overcurrent protection module, a port protection module, a sub-gateway handshake detection module and a control signal driving module, wherein the fiber optic power supply management method includes: After the power supply module provides the supply voltage, the voltage detection module is used to detect whether the supply voltage is within the nominal range. Furthermore, when the supply voltage is within the nominal range and the input overcurrent protection module does not perform overcurrent protection and the port protection module does not perform lightning surge protection, the sub-gateway handshake detection module is used to detect whether the output side of the optical fiber power supply interface module is connected to a sub-gateway; When a sub-gateway is connected to the output side of the optical fiber power supply interface module, the control signal driving module outputs a driving signal to the power supply control switch module to drive the positive and negative poles of the power supply control switch module to be in a conductive state, thereby realizing power supply to the sub-gateway.

[0014] Based on the above, the present application also provides an FTTR device, including a main gateway, an optical splitter, a fiber optic power supply interface module, a sub-gateway and the above-mentioned fiber optic power supply management circuit.

[0015] For the optical fiber power supply management circuit, method and FTTR device provided by the application, the optical fiber power supply management circuit comprises: a power supply module, wherein the positive electrode of the input side of the optical fiber power supply interface module is connected with the positive electrode of the power supply module, and the output side of the optical fiber power supply interface module is connected with the sub-gateway through the optical-electrical composite cable; a power supply control switch module, wherein the positive electrode of the power supply control switch module is connected with the negative electrode of the input side of the optical fiber power supply interface module, and the negative electrode of the power supply control switch module is connected with the negative electrode of the power supply module; wherein when power supply to the sub-gateway is needed, the power supply control switch module controls the positive electrode and the negative electrode to be turned on to form a power supply loop; when power supply to the sub-gateway is not needed, the power supply control switch module controls the positive electrode and the negative electrode to be turned off so that the power supply loop is disconnected and the power supply to the sub-gateway is stopped. Based on the above, since the power supply control switch module is configured, the power supply loop can be formed when power supply to the sub-gateway is needed, and the power supply loop is disconnected when power supply to the sub-gateway is not needed, so that the power supply to the sub-gateway is effectively managed, and the problem that the power supply to the sub-gateway cannot be controlled in the case of a safety accident or the power supply cannot be effectively controlled after a safety accident is avoided, thereby the problem of relatively low safety of optical fiber power supply in the prior art can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to make the above-mentioned purposes, features and advantages of the application more obvious and easy to understand, the following preferred embodiments are specifically described below with reference to the accompanying drawings.

[0017] Figure 1 The structural block diagram of the FTTR device provided by the embodiment of the application.

[0018] Figure 2 The system diagram of the optical splitter with multiple downstream optical ports provided by the embodiment of the application.

[0019] Figure 3 The application schematic diagram of the optical fiber power supply management circuit provided by the embodiment of the application.

[0020] Figure 4 The schematic diagram of the power supply module provided by the embodiment of the application.

[0021] Figure 5 The schematic diagram of the input overcurrent protection module provided by the embodiment of the application.

[0022] Figure 6 The schematic diagram of the port protection module provided by the embodiment of the application.

[0023] Figure 7 The schematic diagram of the voltage detection module provided by the embodiment of the application.

[0024] Figure 8 The schematic diagram of the sub-gateway handshake detection module provided by the embodiment of the application.

[0025] Figure 9 A schematic diagram of a power supply control switch module provided in an embodiment of the present application.

[0026] Figure 10 A schematic diagram of a control signal driving module provided in an embodiment of the present application.

[0027] Figure 11 A schematic diagram of an output overcurrent protection module provided in an embodiment of the present application.

[0028] Figure 12 A schematic diagram of an output overcurrent detection module provided in an embodiment of the present application.

[0029] Figure 13 A schematic diagram of a current detection module provided in an embodiment of the present application. DETAILED DESCRIPTION

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.

[0032] like Figure 1 As shown, an embodiment of the present application provides an FTTR device. The FTTR device may include a main gateway, an optical splitter, a fiber optic power supply interface module, a sub-gateway, and a fiber optic power supply management circuit. The main gateway provides the sub-gateway with a fiber optic signal through the optical splitter and the fiber optic power supply interface module. Specifically, the downlink optical port of the main gateway can be connected to the uplink optical port of the optical splitter, and the downlink optical port of the optical splitter can be connected to the fiber end of the fiber optic power supply interface module. In this way, the main gateway can transmit the fiber optic signal to the fiber optic power supply interface module, and the output side of the fiber optic power supply interface module is connected to the sub-gateway through an optoelectronic composite cable, thereby further transmitting the fiber optic signal to the sub-gateway.

[0033] Furthermore, the optical fiber power supply management circuit can be connected to the positive and negative poles of the input side (for power input) of the optical fiber power supply interface module, so that power can be supplied to the sub-gateway through the optical fiber power supply interface module and the optoelectronic composite cable.

[0034] It can be understood that in some embodiments, the optical splitter can have multiple downstream optical ports, such as 4, 8, 16, etc., so that connection with multiple fiber optic power supply interface modules can be achieved through multiple downstream optical ports, thereby providing fiber optic signals for multiple sub-gateways respectively.

[0035] For example, combining Figure 2 As shown, the optical splitter can have one cascade optical port and four downlink optical ports. The one cascade optical port can be connected to other optical splitters to expand the optical path. The four downlink optical ports can be connected one-to-one with four fiber optic power supply interface modules, which can then be connected one-to-one with four sub-gateways. This way, optical fiber signals can be provided to each of the four sub-gateways.

[0036] In addition, for multiple fiber optic power supply interface modules and multiple sub-gateways, multiple fiber optic power supply management circuits can be configured accordingly, such as one fiber optic power supply management circuit supplies power to one connected sub-gateway through one connected fiber optic power supply interface module. Figure 2 For example, when there are four fiber power supply interface modules and four sub-gateways, there may be four fiber power supply management circuits.

[0037] In addition, it should be noted that when multiple fiber optic power supply management circuits are configured, the multiple fiber optic power supply management circuits can be independent of each other, or some electrical components can be shared. For example, when a control module is provided, the control module can be shared, that is, multiple fiber optic power supply management circuits share one control module. In this way, while reducing equipment costs, it is also convenient for the control module to perform unified power supply management for multiple fiber optic power supply interface modules and multiple sub-gateways. Taking four fiber optic power supply interface modules as an example, the unified power supply management is explained: The lower optical port 1 needs to guarantee the key service, and needs to preferentially satisfy the power supply and service function guarantee. Under normal circumstances, each sub-gateway is budgeted according to the 15.4W power consumption required by the 802.3 AF standard, and the total power consumption requirement of four sub-gateways is 61.6W, plus the 1W power consumption required by the optical fiber power supply management circuit itself, the power consumption requirement of the power input is required to be greater than 62.6W. Based on this, if a 36W power supply is selected for power supply. According to the above requirements, it cannot meet the demand of hanging four full-load sub-gateways, and has the guarantee function of power supply priority. By default, the priority of the lower optical port 1 is 1, the priority of the lower optical port 2 is 2, the priority of the lower optical port 3 is 3, and the priority of the lower optical port 4 is 4. The smaller the number, the higher the priority of the corresponding lower optical port.

[0038] When two sub-gateways are connected to the two optical fiber power supply interface modules corresponding to the lower optical port 3 and the lower optical port 4 respectively, the maximum total power consumption of the load is 30.8W, which does not exceed the input power of the 36W power supply. The two sub-gateways corresponding to the lower optical port 3 and the lower optical port 4 are normally powered on and work, and the corresponding priority marks are 3 and 4. When the two optical fiber power supply interface modules corresponding to the lower optical port 1 are connected to the sub-gateway, at this time, the total power consumption of the three sub-gateways is 46.2W in theory, and the input power supply power consumption does not meet the demand. If the three sub-gateways are forced to be powered on and work, it will cause insufficient input power supply power, abnormality such as system downtime and repeated restart of the input power supply, and abnormal system work.

[0039] In this way, the priority management function can avoid such situations.

[0040] Specifically, when the third sub-gateway is connected to the fiber optic power supply interface module corresponding to downstream optical port 1, the total power consumption of the connected sub-gateways is calculated. The power consumption of the sub-gateways connected to the fiber optic power supply interface modules corresponding to downstream optical ports 3 and 4 is 30.8W. If the sub-gateway corresponding to downstream optical port 1 is directly powered on, the entire system will crash. The priority policy intervenes. First, the priorities of the downstream optical ports corresponding to the already powered-on sub-gateways are checked and marked as 3 and 4, respectively. Then, it is determined that the downstream optical port to be connected is downstream optical port 1, and its priority is 1, which is higher than the priorities of downstream optical ports 3 and 4. Therefore, downstream optical port 4, with a priority of 4, is forced to power off first. The current overall power consumption is then calculated in real time. At this point, only the sub-gateway corresponding to downstream optical port 3 is powered on. The power consumption is calculated to be 15.4W, while the input power consumption is 36W. Therefore, it is determined that the new sub-gateway can be connected. In this way, the downstream optical ports are polled for handshake / detection, and it is determined that downstream optical ports 1 and 4 are ready to power on. Continuing to check the priorities of downstream optical ports 1 and 4 to be powered on, the system finds that they are 1 and 4, respectively. Furthermore, downstream optical port 1 has a higher priority than downstream optical port 4. It is determined that powering both downstream optical ports 1 and 4 simultaneously would result in a total power consumption exceeding the power input power of 36W. Therefore, powering on the lower-priority downstream optical port 4 is abandoned. Simultaneously, the system calculates the power consumption of the sub-gateway corresponding to downstream optical port 1 after powering on, and adds the current power consumption. This power consumption does not exceed the power input power of 36W, indicating that downstream optical port 1 can be safely powered on. Therefore, power can be supplied to the fiber optic power supply interface module corresponding to downstream optical port 1. After the power supply stabilizes, the system monitors the power consumption of each downstream sub-gateway in real time to determine whether it is operating normally and to promptly intervene and address any abnormalities.

[0041] Based on this, through the above power consumption management and power supply priority processing, it can be ensured that the connected sub-gateways can be in a stable and reliable working state.

[0042] Combine Figure 3 The present application also provides an optical fiber power supply management circuit applicable to the above-mentioned FTTR equipment. The optical fiber power supply management circuit may include a power supply module and a power supply control switch module.

[0043] Specifically, the positive pole of the input side of the optical fiber power supply interface module is connected to the positive pole of the power supply module, and the output side of the optical fiber power supply interface module is connected to the sub-gateway via an optoelectronic composite cable to provide power and optical fiber signals to the sub-gateway. The positive pole of the power supply control switch module is connected to the negative pole of the input side of the optical fiber power supply interface module, and the negative pole of the power supply control switch module is connected to the negative pole of the power supply module.

[0044] Based on the above, when power needs to be supplied to the sub-gateway, the power supply control switch module controls the positive and negative electrodes to be turned on, so that the positive electrode of the power supply module, the positive electrode of the input side of the fiber power supply interface module, the positive electrode of the output side of the fiber power supply interface module, the positive electrode of the sub-gateway, the negative electrode of the sub-gateway, the negative electrode of the output side of the fiber power supply interface module, the negative electrode of the input side of the fiber power supply interface module, the positive electrode of the power supply control switch module, the negative electrode of the power supply control switch module, and the negative electrode of the power supply module form a power supply loop. When power does not need to be supplied to the sub-gateway, the power supply control switch module controls the positive and negative electrodes to be turned off, so that the power supply loop is disconnected and the power supply to the sub-gateway is stopped.

[0045] Based on the above, since the power supply control switch module is configured, the power supply loop can be formed when power needs to be supplied to the sub-gateway, and the power supply loop can be disconnected when power does not need to be supplied to the sub-gateway, thereby effectively managing the power supply of the sub-gateway and avoiding the problem that the power supply to the sub-gateway cannot be controlled in the event of a safety accident or the power supply cannot be effectively supplied after a safety accident. Therefore, the problem of relatively low safety of fiber power supply in the prior art can be improved.

[0046] It can be understood that, in an alternative embodiment, in order to be able to implement overcurrent protection for the sub-gateway during power supply to the sub-gateway, the above-mentioned fiber power supply management circuit can further include an output overcurrent detection module and an output overcurrent protection module.

[0047] In detail, the positive electrode of the output overcurrent detection module is connected to the negative electrode of the power supply control switch module, and the negative electrode of the output overcurrent detection module is connected to the negative electrode of the power supply module. The input end of the output overcurrent protection module is connected to the overcurrent detection signal output end of the output overcurrent detection module, and the output end of the output overcurrent protection module is connected to the control end of the power supply control switch module.

[0048] Based on this, when the overcurrent detection signal output from the overcurrent detection signal output end indicates that there is an overcurrent situation, the output overcurrent protection module outputs an overcurrent protection signal for controlling the positive and negative electrodes of the power supply control switch module to be turned off in response to the overcurrent detection signal. In this way, after the positive and negative electrodes of the power supply switch module are turned off, the power supply loop in which the sub-gateway is located is disconnected, thereby stopping the power supply to the sub-gateway, avoiding the problem that excessive current causes damage to the sub-gateway, and effectively improving the operation safety of the equipment.

[0049] It can be understood that, in an alternative embodiment, in order to be able to implement current protection with higher reliability for the sub-gateway, the fiber power supply management circuit can further include a current detection module, a control module, and a control signal driving module.

[0050] In detail, the detection end of the current detection module is connected with the positive pole of the output overcurrent detection module or the negative pole of the power supply control switch module. The current detection input end of the control module is connected with the output end of the current detection module, for obtaining the current detected by the current detection module, and outputting a corresponding control signal based on the relationship between the current and a preset determined current control condition. The input end of the control signal driving module is connected with the output end of the control module, and the output end of the control signal driving module is connected with the control end of the power supply control switch module, for obtaining the control signal output by the control module, and outputting a driving signal to the power supply control switch module based on the control signal, so as to drive the positive pole and the negative pole of the power supply control switch module to be in a conduction or off state. For example, when the current is too large, the positive pole and the negative pole of the power supply control switch module are driven to be in an off state.

[0051] It can be understood that, in an alternative embodiment, in order to be able to realize the handshake detection of the sub-gateway, so as to effectively control the access of the sub-gateway, the optical fiber power supply management circuit can further include a sub-gateway handshake detection module.

[0052] In detail, the input end of the sub-gateway handshake detection module is connected with the positive pole of the power supply control switch module or the negative pole of the input side of the optical fiber power supply interface module, and the output end of the sub-gateway handshake detection module is connected with the handshake detection input end of the control module, so that the control module is further used for analyzing the state of the sub-gateway connected with the optical fiber power supply interface module based on the signal output by the sub-gateway handshake detection module in response to the detected handshake detection signal, and driving the positive pole and the negative pole of the power supply control switch module to be in a conduction or off state through the control signal driving module based on the state. For example, when it is analyzed that the optical fiber power supply interface module is connected with a sub-gateway, the positive pole and the negative pole of the power supply control switch module can be driven to be in a conduction state, so as to supply power for the sub-gateway.

[0053] It can be understood that, in an alternative embodiment, in order to be able to realize the lightning surge protection of the power supply, and facilitate the sub-gateway handshake detection module to effectively detect the access of the sub-gateway, the optical fiber power supply management circuit can further include a port protection module.

[0054] In detail, the power supply positive pole of the port protection module is connected to the positive pole of the power supply module, the output positive pole of the port protection module is connected to the positive pole of the input side of the optical fiber power supply interface module, the output negative pole of the port protection module is connected to the negative pole of the input side of the optical fiber power supply interface module, and the load end negative pole of the port protection module is connected to the positive pole of the power supply control switch module. When power needs to be supplied to the sub-gateway, the direction of the current is the positive pole of the power supply module, the power supply positive pole of the port protection module, the output positive pole of the port protection module, the positive pole of the input side of the optical fiber power supply interface module, the positive pole of the output side of the optical fiber power supply interface module, the positive pole of the sub-gateway, the negative pole of the sub-gateway, the negative pole of the output side of the optical fiber power supply interface module, the negative pole of the input side of the optical fiber power supply interface module, the output negative pole of the port protection module, the load end negative pole of the port protection module, the positive pole of the power supply control switch module, the negative pole of the power supply control switch module, and the negative pole of the power supply module.

[0055] Based on this, when the output side of the optical fiber power supply interface module is not connected to the sub-gateway, at least some of the electrical components inside the sub-gateway handshake detection module, at least some of the electrical components inside the port protection module, and the positive and negative electrodes of the power supply module form a communication loop, and the level of the signal output by the sub-gateway handshake detection module is a first value, so that the control module determines, based on the signal, that the output side of the optical fiber power supply interface module is not connected to the sub-gateway.

[0056] Furthermore, when a sub-gateway that meets the Ethernet standard is connected to the output side of the optical fiber power supply interface module, the characteristic resistor in the sub-gateway, at least some electrical components inside the sub-gateway handshake detection module, and the positive and negative poles of the power supply module form a connected loop, and the level of the signal output by the sub-gateway handshake detection module is a second value, so that the control module determines, based on the signal, that the output side of the optical fiber power supply interface module is connected to a sub-gateway and meets the Ethernet standard.

[0057] In addition, when a sub-gateway is connected to the output side of the optical fiber power supply interface module and the sub-gateway meets the Ethernet standard, a characteristic resistor in the sub-gateway, at least some electrical components inside the sub-gateway handshake detection module, and the positive and negative electrodes of the power supply module form a connected loop, and the level of the signal output by the sub-gateway handshake detection module is a third value, so that the control module determines, based on the signal, that a sub-gateway is connected to the output side of the optical fiber power supply interface module and does not meet the Ethernet standard.

[0058] It can be understood that, in an alternative embodiment, in order to further protect the equipment from current and voltage, and improve the operation safety of the equipment, the optical fiber power supply management circuit can further include an input overcurrent protection module and a voltage detection module.

[0059] In detail, the positive electrode of the input overcurrent protection module is connected with the negative electrode of the power supply module, and the negative electrode of the input overcurrent protection module is connected with the power supply positive electrode of the port protection module. The input end of the voltage detection module is connected with the negative electrode of the input overcurrent protection module or the power supply positive electrode of the port protection module, and the output end of the voltage detection module is connected with the voltage detection input end of the control module. The control module is further configured to drive the positive electrode and the negative electrode of the power supply control switch module to be in the on or off state through the control signal driving module based on the voltage detection signal input by the voltage detection input end.

[0060] In order to better understand the optical fiber power supply management circuit described above, on the basis of the above embodiment, the optical fiber power supply management circuit is further described in detail in combination with the specific structure and specific functions of each module in the optical fiber power supply management circuit. For details, please refer to the contents shown in Figure 4-13 .

[0061] The system power supply is input through the power supply module. The pin 2 of the ferrite bead element FB4 in the power supply module is connected to the pin 2 of the fuse F3 in the input overcurrent protection module. The pin 1 of the fuse F3 in the overcurrent protection module is connected to the power supply positive electrode PoF+ of the port protection module. The pin 1 of the fuse F3 in the overcurrent protection module is connected to the pin 1 of the resistor R41 in the voltage detection module. The ground of the voltage detection module is connected to the negative electrode of the power supply module. The pin 2 of the output resistor R52 of the voltage detection module outputs the power supply detection signal P1 to the pin P1 of the control module, and the input power supply voltage is detected in real time.

[0062] The output positive electrode PoF+ of the port protection module is connected to the positive electrode PoF+ of the input side of the optical fiber power supply interface module, and the output negative electrode PoF- of the port protection module is connected to the negative electrode PoF- of the input side of the optical fiber power supply interface module. The optical fiber port of the optical fiber power supply interface module is connected to the downstream optical port 1 of the optical splitter. The optical fiber power supply interface module aggregates the optical fiber signal and the power supply, and then is connected to the sub-gateway through the optical and electrical composite cable to supply power to the sub-gateway and connect the optical path.

[0063] The load end negative pole PoF- of the port protection module is connected to the pin 3 (i.e. the drain) of the switching device Q9 of the power supply control switch module through the anti-reverse diode D11, and the load end negative pole PoF- is connected to the pin 1 of the resistance R36 of the sub-gateway handshake detection module, so that the accessed sub-gateway is detected and reported. The pin 1 of the capacitor C37 of the sub-gateway handshake detection module outputs the handshake detection signal F1 to the handshake detection pin F1 of the control module.

[0064] The pin 1 (i.e. the gate) of the switching device Q9 of the power supply control switch module is connected to the pin of the switching device Q10 in the control signal driving module and the pin 3 of the switching device Q11 in the output overcurrent protection module, respectively.

[0065] The pin 1 of the resistance R54 of the control signal driving module is connected to the control output pin S1 (i.e. the output end) of the control module.

[0066] The pin 2 of the switching device Q9 in the power supply control switch module is connected to the pin 2 of the resistance R48 in the output overcurrent detection module and the pin 1 of the resistance R46 in the current detection module, respectively.

[0067] The ground end of the output overcurrent detection module is connected to the negative pole of the power supply module.

[0068] The pin 2 of the resistance R46 in the output overcurrent detection module is connected to the pin L1 of the control module, so as to detect the power supply current of the sub-gateway in real time.

[0069] The control module is a general microcontroller unit (MCU) or other central processing unit (CPU) unit. In the embodiment of the present application, when the 1:4 optical power splitter scheme is adopted, since there are four optical fiber power interface modules, the control module needs to have four groups of independent control signals.

[0070] The embodiment of the present application takes a group of downlink optical port 1 as an example to describe the signal requirements: 1. P1: power supply voltage detection signal; 2. F1: load detection handshake signal; 3. S1: power supply switch control signal; 4. L1: load current detection signal; Since the power supply voltage is shared in the system, only the P1 power supply voltage signal detection of the embodiment of the present application is needed, and the remaining downlink optical port 2, downlink optical port 3 and downlink optical port 4 which are not marked can not be connected with the P1 signal alone, and can directly use the detected power supply voltage P1 of the embodiment of the present application.

[0071] At the same time, since the P1, S1, and L1 signals are analog detection signals, the corresponding pins P1, S1, and L1 of the control module need to have analog-to-digital converter (ADC) function to convert the collected P1, S1, and L1 analog signals into corresponding digital signals for processing.

[0072] In the embodiment of the present application, the 1:4 optoelectronic splitter system uses four sets of relatively independent downlink interfaces. Therefore, the control module requires a total of nine independent pins with analog-to-digital converter (ADC) functions to separately process the signals detected by the four sets of downlinks.

[0073] Input power supply voltage abnormality detection: The system power is input from the power supply module, passes through the input overcurrent protection module, and is connected to pin 1 of resistor R41 in the voltage detection module. The supply voltage is then connected to pin 1 of resistor R53 via pin 2 of resistor R41. Pin 2 of resistor R53 is connected to the negative terminal of the power supply module. The input power is divided by resistors R41 and R53. The output power supply voltage detection signal P1 is connected to pin P1 of the control module via pin 2 of resistor R52, which samples the input power supply voltage. The control module detects the voltage divider signal between resistors R41 and R53. After voltage division, it outputs a detection voltage signal, Vp1. Vp1 is calculated as: Vp1 = Power Supply * (R41 / (R41 + R53)). Based on the set values ​​of resistors R41 and R53, when the Vp1 detection voltage falls within the range of [2.485V to 2.65V], the power supply voltage is normal. If it falls below this range, the control module determines that the power supply voltage is too low, indicating an abnormality; if it rises above this range, the control module determines that the power supply voltage is too high, indicating an abnormality. In either case, the control module outputs a switch control signal to forcibly shut down the power control switch module, forcibly shutting off the power supply circuit to the optical power supply interface module and the sub-gateway to protect the sub-gateway. The control module then outputs an alarm signal and initiates the next round of power supply voltage detection. When the detection voltage signal falls within the range of [2.485V to 2.65V], the control module determines that the power supply voltage meets regulatory requirements and proceeds to the next handshake / detection process.

[0074] Input power supply current abnormality detection: In the embodiment of the present application, four sub-gateways can be connected. Taking the maximum operating power consumption of each sub-gateway as meeting the 802.3 AF (15.4W) standard as an example, the total power consumption of the four sub-gateways is 61.6W, plus the operating power consumption of the optical fiber power supply management circuit itself of 1W, plus the margin, and setting it to be determined as over-power consumption when the operating power consumption is greater than 63.5W. At this time, the fuse (fuse) selected by the input overcurrent protection module will work, disconnecting the input power supply to the rear, thereby protecting the optical fiber power supply management circuit and the sub-gateway. When the operating power consumption is less than the set value of 63.5W, the self-resettable fuse used by the input overcurrent protection module will work normally.

[0075] Sub-gateway handshake / detection workflow: Handshake detection is performed when no sub-gateway is connected: When it is detected that the power supply voltage meets the specification requirements and the power supply current meets the design requirements, the sub-gateway handshake detection module detects whether there is a sub-gateway connected to the optical power supply interface module. When no sub-gateway is connected to the optical power supply interface module, the sub-gateway handshake detection module forms a loop through the resistor R38 and diode D10 in the port protection module and the resistors R36, R65, and R66 in the sub-gateway handshake detection module. At this time, the handshake / detection signal F1 output by the sub-gateway handshake detection module has a level of approximately 2.185V. The handshake / detection signal F1 of the sub-gateway handshake detection module is input to the control module, determining that no sub-gateway is connected to the optical power supply interface module, and continuing to enter the handshake detection phase.

[0076] When accessing a sub-gateway that complies with the 802.3 AF standard: When the optical power supply interface module is connected to a sub-gateway that complies with the 802.3 AF standard, the sub-gateway provides a characteristic resistor, Rpd, with a resistance of approximately 24.9K. The specification requires an Rpd range of 16K to 26.5K. This characteristic resistor, Rpd, forms a circuit with resistors R36, R65, and R66 in the sub-gateway handshake detection module. The Vp1 detection voltage is approximately 2.5V to 2.6V, which is input to the control module. This confirms that a sub-gateway is connected to the optical power supply interface module and that the sub-gateway complies with the 802.3 AF standard. The sub-gateway is then powered. The control module outputs a control signal S1 to the control signal driver module. The control signal driver module outputs a control signal S1_Ctrl to the power supply control switch module, thereby controlling the power supply control switch module to open, thereby connecting pin 3 (drain) and pin 2 (source) of the switch device Q9 of the power supply control switch module. The output overcurrent detection module is connected to the negative electrode of the power supply module, thereby forming a power supply circuit for the optical fiber power supply interface module and the sub-gateway, and powering on the sub-gateway.

[0077] When accessing a sub-gateway that does not meet the 802.3 AF standard - A: When the fiber-optic power supply interface module is connected to a sub-gateway that does not meet the 802.3AF standard, the sub-gateway also provides a characteristic resistor Rpd with a resistance value other than 24.9K. This resistor forms a loop with resistors R36, R65, and R66 in the sub-gateway handshake detection module. To accommodate more non-standard sub-gateways, the characteristic resistor Rpd is set to a range of 12K to 39K. This allows for compatibility with both standard and non-standard sub-gateways. The Vp1 detection voltage is then between 2.48V and 2.63V, which is output to the control module. When the Vp1 detection voltage reaches 2.48V to 2.63V, it is determined that a sub-gateway is connected and power is supplied to the connected sub-gateway. The control module outputs a control signal S1 to the control signal driving module, and the control signal driving module outputs a control signal S1_Ctrl to the power supply control switch module, thereby controlling the power supply control switch module to open, thereby connecting pins 3 and 2 of the switching device Q9 of the power supply control switch module, and then connecting to the negative pole of the power supply module through the output overcurrent detection module, thereby forming a power supply circuit for the optical fiber power supply interface module and the sub-gateway, and the optical fiber power supply interface module powers on the sub-gateway.

[0078] When accessing a sub-gateway that does not meet the 802.3 AF standard - B: When the fiber optic power supply interface module is connected to a sub-gateway that does not meet the 802.3AF standard, the sub-gateway also provides a characteristic resistor Rpd with a resistance value other than 24.9K. This resistor forms a circuit with resistors R36, R65, and R66 in the sub-gateway handshake detection module. To accommodate more non-standard sub-gateways, the Rpd detection range is set to [12K to 39K]. This allows compatibility with both standard and non-standard sub-gateways. The Vp1 detection voltage is now between [2.48V and 2.63V] and is output to the control module. If the Vp1 detection voltage does not meet the [2.48V to 2.63V] range after a sub-gateway is connected, the connected device is determined to be a non-standard sub-gateway, and power can be withheld. The control module outputs the control signal S1 to the control signal driving module, and the control signal driving module outputs the control signal S1_Ctrl to the power supply control switch module, thereby controlling the power supply control switch module to be forced to close, ensuring that pins 3 and 2 of the switching device Q9 of the power supply control switch module are not conductive, and the power supply circuit between the optical fiber power supply interface module and the sub-gateway cannot be formed, and the optical fiber power supply interface module does not power on the sub-gateway.

[0079] Sub-gateway device overcurrent protection; After the fiber-optic power supply interface module properly powers on the connected sub-gateway, the current detection module performs real-time operating current monitoring. This module detects the output current and is connected to the control module's detection pin L1 via resistor R46. The maximum power consumption of the connected sub-gateway is 15.4W, as specified by the 802.3 AF standard. The sub-gateway's operating current is monitored in real time and, within the control module, combined with the supply voltage detected by the voltage detection module, calculates the sub-gateway's real-time power consumption.

[0080] When the power consumption of a sub-gateway exceeds the 15.4W standard of 802.3AF, it is determined that the sub-gateway is abnormal or short-circuited. Two methods can be used to respond and handle the problem simultaneously: Method 1: When the sub-gateway's power consumption exceeds the 802.3 AF standard of 15.4W, the control module outputs control signal S1 to the control signal driver module, which in turn outputs control signal S1_Ctrl to the power control switch module. This forces the power control switch module to shut down, ensuring that pins 3 and 2 of the power control switch module's switch device Q9 are disconnected. This prevents the sub-gateway from forming a power supply circuit and forcibly powers off the sub-gateway to protect it. Method 1 actively monitors the sub-gateway's operating power consumption in real time. It responds promptly to abnormal sub-gateway power consumption by shutting off power to the sub-gateway, thereby protecting it.

[0081] Method 2: Pin 2 of the resistor R45 in the output overcurrent protection module detects the load current detection signal of pin 2 of the resistor R48 in the output overcurrent detection module. When the power consumption of the sub-gateway exceeds 15.4W of the 802.3 AF standard, the load current detection signal is output to the negative electrode of the power supply module through pin 2 of the resistor R51 in the output overcurrent protection module, thereby forming a power supply loop. The overcurrent detection voltage Vp is automatically generated at pin 2 of the resistor R51. When the power consumption of the sub-gateway exceeds 15.4W limited by the 802.3 AF standard, the detection voltage automatically generated by Vp reaches the Vbe required by the transistor Q11 in the output overcurrent protection module. At the on-point, transistor Q11 is immediately turned on, and pin 3 (collector) and pin 2 (emitter) of the transistor are turned on, thereby automatically providing a drive signal S_Ctrl to the power supply control switch module, thereby controlling the power supply control switch module to forcibly turn off the power supply, ensuring that pins 3 and pin 2 of the switching device Q9 of the power supply control switch module are not conductive, the power supply circuit of the sub-gateway cannot be formed, and the sub-gateway is forced to shut down, thereby protecting the sub-gateway.

[0082] The embodiment of the present application further provides a fiber optic power supply management method applicable to the above-mentioned fiber optic power supply management circuit, wherein the fiber optic power supply management method may include the following steps: After the power supply module provides the input voltage, the voltage detection module is used to detect whether the input voltage is within the nominal range. When the input voltage is within the nominal range and the input overcurrent protection module does not perform overcurrent protection and the port protection module does not perform lightning surge protection, the sub-gateway handshake detection module is used to detect whether the output side of the optical fiber power supply interface module is connected to a sub-gateway. When the output side of the optical fiber power supply interface module is connected to a sub-gateway, the control signal driving module is used to output a driving signal to the power supply control switch module to drive the positive and negative poles of the power supply control switch module to be in a conductive state, thereby realizing power supply to the sub-gateway.

[0083] The specific contents of the above steps can be referred to the relevant explanations of the optical fiber power supply management circuit in the previous text, and will not be repeated here.

[0084] To summarize, for the optical fiber power supply management circuit, method, and FTTR equipment provided in this application, the optical fiber power supply management circuit includes: a power supply module, wherein the positive pole of the input side of the optical fiber power supply interface module is connected to the positive pole of the power supply module, and the output side of the optical fiber power supply interface module is connected to the sub-gateway through an optoelectronic composite cable; a power supply control switch module, wherein the positive pole of the power supply control switch module is connected to the negative pole of the input side of the optical fiber power supply interface module, and the negative pole of the power supply control switch module is connected to the negative pole of the power supply module; wherein, when power needs to be supplied to the sub-gateway, the power supply control switch module controls the positive pole and the negative pole to be turned on to form a power supply loop; when power does not need to be supplied to the sub-gateway, the power supply control switch module controls the positive pole and the negative pole to be turned off, so that the power supply loop is disconnected and power supply to the sub-gateway is stopped. Based on the above content, since a power supply control switch module is configured, a power supply loop can be formed when power needs to be supplied to the sub-gateway, and the power supply loop can be disconnected when power is not needed to the sub-gateway, thereby effectively managing the power supply of the sub-gateway, avoiding the problem of not being able to control the power supply of the sub-gateway when a safety accident occurs or not being able to effectively supply power after a safety accident. Therefore, the problem of relatively low security of fiber optic power supply in the existing technology can be improved.

[0085] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. An optical fiber power supply management circuit, characterized in that: Applied to FTTR equipment, the FTTR equipment includes a main gateway, an optical splitter, an optical fiber power supply interface module and a sub-gateway. The main gateway provides optical fiber signals to the sub-gateway through the optical splitter and the optical fiber power supply interface module, wherein the optical fiber power supply management circuit includes: A power supply module, wherein the positive electrode of the input side of the optical fiber power supply interface module is connected to the positive electrode of the power supply module, and the output side of the optical fiber power supply interface module is connected to the sub-gateway through an optoelectronic composite cable to provide power and optical fiber signals to the sub-gateway; A power supply control switch module, wherein the positive electrode of the power supply control switch module is connected to the negative electrode of the input side of the optical fiber power supply interface module, and the negative electrode of the power supply control switch module is connected to the negative electrode of the power supply module; Wherein, when power needs to be supplied to the sub-gateway, the power supply control switch module controls the positive and negative poles to be conductive, so that the positive pole of the power supply module, the positive pole of the input side of the optical fiber power supply interface module, the positive pole of the output side of the optical fiber power supply interface module, the positive pole of the sub-gateway, the negative pole of the output side of the optical fiber power supply interface module, the negative pole of the input side of the optical fiber power supply interface module, the positive pole of the power supply control switch module, the negative pole of the power supply control switch module, and the negative pole of the power supply module form a power supply circuit; When there is no need to supply power to the sub-gateway, the power supply control switch module controls the positive electrode and the negative electrode to be turned off, so that the power supply loop is disconnected and the power supply to the sub-gateway is stopped.

2. The optical fiber power supply management circuit according to claim 1, characterized in that: The optical fiber power supply management circuit further includes: an output overcurrent detection module, wherein the positive electrode of the output overcurrent detection module is connected to the negative electrode of the power supply control switch module, and the negative electrode of the output overcurrent detection module is connected to the negative electrode of the power supply module; An output overcurrent protection module, wherein the input end of the output overcurrent protection module is connected to the overcurrent detection signal output end of the output overcurrent detection module, and the output end of the output overcurrent protection module is connected to the control end of the power supply control switch module; When the overcurrent detection signal output from the overcurrent detection signal output terminal indicates an overcurrent condition, the output overcurrent protection module responds to the overcurrent detection signal and outputs an overcurrent protection signal for controlling the positive and negative poles of the power supply control switch module to be shut down.

3. The optical fiber power supply management circuit according to claim 2, characterized in that: The optical fiber power supply management circuit further includes: A current detection module, wherein a detection terminal of the current detection module is connected to the positive electrode of the output overcurrent detection module or the negative electrode of the power supply control switch module; a control module, wherein a current detection input terminal of the control module is connected to an output terminal of the current detection module, and is configured to obtain a current detected by the current detection module and output a corresponding control signal based on a relationship between the current and a preset current control condition; A control signal driving module, wherein the input end of the control signal driving module is connected to the output end of the control module, and the output end of the control signal driving module is connected to the control end of the power supply control switch module, for obtaining the control signal output by the control module, and outputting a driving signal to the power supply control switch module based on the control signal to drive the positive and negative poles of the power supply control switch module to be in an on or off state.

4. The optical fiber power supply management circuit according to claim 3, characterized in that: The optical fiber power supply management circuit further includes: A sub-gateway handshake detection module, wherein the input end of the sub-gateway handshake detection module is connected to the positive pole of the power supply control switch module or the negative pole of the input side of the optical fiber power supply interface module, and the output end of the sub-gateway handshake detection module is connected to the handshake detection input end of the control module, so that the control module is also used to analyze the state of the sub-gateway connected to the optical fiber power supply interface module based on the signal output by the sub-gateway handshake detection module in response to the detected handshake detection signal, and based on the state, drive the positive pole and negative pole of the power supply control switch module to be in an on or off state through the control signal driving module.

5. The optical fiber power supply management circuit according to claim 4, characterized in that: The optical fiber power supply management circuit further includes: A port protection module, wherein the power supply positive electrode of the port protection module is connected to the positive electrode of the power supply module, the output positive electrode of the port protection module is connected to the positive electrode of the input side of the optical fiber power supply interface module, the output negative electrode of the port protection module is connected to the negative electrode of the input side of the optical fiber power supply interface module, and the load end negative electrode of the port protection module is connected to the positive electrode of the power supply control switch module. When power needs to be supplied to the sub-gateway, the direction of the current is the positive electrode of the power supply module, the power supply positive electrode of the port protection module, the output positive electrode of the port protection module, the positive electrode of the input side of the optical fiber power supply interface module, the positive electrode of the output side of the optical fiber power supply interface module, the positive electrode of the sub-gateway, the negative electrode of the sub-gateway, the negative electrode of the output side of the optical fiber power supply interface module, the negative electrode of the input side of the optical fiber power supply interface module, the output negative electrode of the port protection module, the negative electrode of the load end of the port protection module, the positive electrode of the power supply control switch module, the negative electrode of the power supply control switch module, and the negative electrode of the power supply module. When the output side of the optical fiber power supply interface module is not connected to the sub-gateway, at least some of the electrical components inside the sub-gateway handshake detection module, at least some of the electrical components inside the port protection module, and the positive and negative electrodes of the power supply module form a communication loop, and the level of the signal output by the sub-gateway handshake detection module is a first value, so that the control module determines, based on the signal, that the output side of the optical fiber power supply interface module is not connected to the sub-gateway.

6. The optical fiber power supply management circuit according to claim 5, characterized in that: When a sub-gateway that meets the Ethernet standard is connected to the output side of the optical fiber power supply interface module, a characteristic resistor in the sub-gateway, at least some electrical components inside the sub-gateway handshake detection module, and the positive and negative electrodes of the power supply module form a connected loop, and the level of the signal output by the sub-gateway handshake detection module is a second value, so that the control module determines, based on the signal, that the output side of the optical fiber power supply interface module is connected to a sub-gateway and meets the Ethernet standard.

7. The optical fiber power supply management circuit according to claim 5, characterized in that: When a sub-gateway is connected to the output side of the optical fiber power supply interface module and the sub-gateway meets the Ethernet standard, a characteristic resistor in the sub-gateway, at least some electrical components inside the sub-gateway handshake detection module, and the positive and negative electrodes of the power supply module form a connected loop, and the level of the signal output by the sub-gateway handshake detection module is a third value, so that the control module determines, based on the signal, that a sub-gateway is connected to the output side of the optical fiber power supply interface module and does not meet the Ethernet standard.

8. The optical fiber power supply management circuit according to claim 5, characterized in that: The optical fiber power supply management circuit further includes: An input overcurrent protection module, wherein the positive electrode of the input overcurrent protection module is connected to the negative electrode of the power supply module, and the negative electrode of the input overcurrent protection module is connected to the positive power supply electrode of the port protection module; A voltage detection module, wherein the input end of the voltage detection module is connected to the negative pole of the input overcurrent protection module or the positive power supply pole of the port protection module, the output end of the voltage detection module is connected to the voltage detection input end of the control module, and the control module is further used to drive the positive pole and negative pole of the power supply control switch module to be in an on or off state through the control signal driving module based on the voltage detection signal input from the voltage detection input end.

9. A method for managing optical fiber power supply, characterized in that: The optical fiber power supply management circuit according to any one of claims 3 to 8 includes a control module, the optical fiber power supply management circuit further includes a power supply module, a voltage detection module, an input overcurrent protection module, a port protection module, a sub-gateway handshake detection module, and a control signal driving module, wherein the optical fiber power supply management method includes: After the power supply module provides the supply voltage, the voltage detection module is used to detect whether the supply voltage is within the nominal range. Furthermore, when the supply voltage is within the nominal range and the input overcurrent protection module does not perform overcurrent protection and the port protection module does not perform lightning surge protection, the sub-gateway handshake detection module is used to detect whether the output side of the optical fiber power supply interface module is connected to a sub-gateway; When a sub-gateway is connected to the output side of the optical fiber power supply interface module, the control signal driving module outputs a driving signal to the power supply control switch module to drive the positive and negative poles of the power supply control switch module to be in a conductive state, thereby realizing power supply to the sub-gateway.

10. A FTTR device, characterized in that: It comprises a main gateway, an optical splitter, a fiber optic power supply interface module, a sub-gateway and the fiber optic power supply management circuit according to any one of claims 1 to 8.

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