Abstract: A power over Ethernet (PoE) power supplying method where power sourcing equipment (PSE) and a powered device exchange link layer discovery protocol data units (LLDPDUs). Each of the LLDPDUs includes two power values. Each of the power values indicates requested or allocated power for one of two sets of cable pairs of the Ethernet twisted pair connecting the PSE and the powered device. Accordingly, the supplied powers to the powered device at sets of cable pairs are independent from each other.

Abstract: A Power over Ethernet (PoE) power supply device, a PoE power supply system, an interface part, and a method for detecting an optical module, and pertaining to the field of communications technologies, where the PoE power supply device includes a photoelectric composite interface part, and wherein the photoelectric composite interface part integrates an optical interface and an electrical interface, and is configured to be coupled to a photoelectric composite module. The photoelectric composite interface part can complete PoE power supply while transmitting a signal.

Abstract: A power over Ethernet (PoE) power supplying method where power sourcing equipment (PSE) and a powered device exchange link layer discovery protocol data units (LLDPDUs). Each of the LLDPDUs includes two power values. Each of the power values indicates requested or allocated power for one of two sets of cable pairs of the Ethernet twisted pair connecting the PSE and the powered device. Accordingly, the supplied powers to the powered device at sets of cable pairs are independent from each other.

Abstract: Embodiments of the present disclosure include an optical/electrical hybrid male connector, a female connector, and an optical/electrical hybrid connector system. The optical/electrical hybrid male connector includes a male base and at least two optical connectors. The male base includes a base body and at least two male accommodating channels disposed on the base body. The at least two male accommodating channels one-to-one correspond to the at least two optical connectors, and each optical connector is mounted on one corresponding male accommodating channel.

Abstract: This application discloses a power supply management system, and a power supply management method and apparatus applied to the system. The system includes a power sourcing equipment, a powered device, and a power supply line. The power sourcing equipment sends a second voltage to the powered device to determine a first voltage. The first voltage is a maximum power supply voltage agreed on by the power sourcing equipment and the powered device. The power sourcing equipment supplies power to the powered device based on the first voltage. In this application, the power sourcing equipment supplies power to the powered device based on the maximum power supply voltage that can be supported by the powered device, so that a loss on the power supply line is reduced.

Abstract: A power over Ethernet (PoE) power supplying method where power sourcing equipment (PSE) and a powered device exchange link layer discovery protocol data units (LLDPDUs). Each of the LLDPDUs includes two power values. Each of the power values indicates requested or allocated power for one of two sets of cable pairs of the Ethernet twisted pair connecting the PSE and the powered device. Accordingly, the supplied powers to the powered device at sets of cable pairs are independent from each other.

Abstract: A Power over Ethernet (PoE) power supply device, a PoE power supply system, an interface part, and a method for detecting an optical module, and pertaining to the field of communications technologies, where the PoE power supply device includes a photoelectric composite interface part, and wherein the photoelectric composite interface part integrates an optical interface and an electrical interface, and is configured to be coupled to a photoelectric composite module. The photoelectric composite interface part can complete PoE power supply while transmitting a signal.

Abstract: A network device includes a power system, a processor, a power sourcing equipment PSE chip coupled to a first forward power supply port, and a first powered device PD chip coupled to a first reverse power receiving port. A first powered device is connected to the first forward power supply port and the first reverse power receiving port. When detecting that a power failure occurs on the network device, the processor instructs the first PD chip to draw power from the first powered device; the first PD chip draws the power from the first powered device through the first reverse power receiving port, and supplies the obtained power to the power system. Therefore, when a power failure occurs, the network device can continue to obtain power and work properly when the power failure occurs.

Abstract: A power supply management method performed by power sourcing equipment, includes receiving a power-on request from a level-1 powered device, where the power-on request includes a port identifier of a level-2 power supply port that is detected to be valid in the level-1 powered device, determining, based on the power-on request and an outputtable power of the power sourcing equipment, a level-2 power supply port that is allowed to be powered on in the level-1 powered device, and sending a power-on instruction to the level-1 powered device, where the power-on instruction includes a port identifier of the level-2 power supply port that is allowed to be powered on in the level-1 powered device. The power sourcing equipment uses the level-1 powered device and a level-2 powered device connected to the level-1 powered device as a whole, and centrally performs power supply control and power management.

Abstract: A power over Ethernet method includes: performing, by power sourcing equipment, a plurality of detections by using an Ethernet port, connected to an intermediate device, of the power sourcing equipment, where a quantity of detections performed by the power sourcing equipment is equal to a quantity of power supply ports of the intermediate device; and if at least one detection result of the plurality of detections is effective, sending, by the power sourcing equipment, a power supply indication to the intermediate device, and supplying power to the connection port. In this way, the power sourcing equipment can supply power across the intermediate device to a powered device connected to the intermediate device, and a power loss caused by voltage conversion is avoided.

Abstract: A powered device (PD) used for power over Ethernet (PoE), where the PD includes an Ethernet port and a rectifier circuit. The rectifier circuit includes a first control circuit and a second control circuit, where the first control circuit is configured to control a first metal-oxide semiconductor field-effect transistor (MOSFET) and a second MOSFET, avoid turning on the first MOSFET and the second MOSFET at a PoE detection stage, and turn on at least one of the first MOSFET or the second MOSFET at a PoE power supply stage. The second control circuit is configured to control a third MOSFET and a fourth MOSFET, turn on at least one of the third MOSFET or the fourth MOSFET at the PoE power supply stage, and avoid turning on the third MOSFET and the fourth MOSFET at the PoE detection stage.

Abstract: A power supply management method performed by power sourcing equipment, includes receiving a power-on request from a level-1 powered device, where the power-on request includes a port identifier of a level-2 power supply port that is detected to be valid in the level-1 powered device, determining, based on the power-on request and an outputtable power of the power sourcing equipment, a level-2 power supply port that is allowed to be powered on in the level-1 powered device, and sending a power-on instruction to the level-1 powered device, where the power-on instruction includes a port identifier of the level-2 power supply port that is allowed to be powered on in the level-1 powered device. The power sourcing equipment uses the level-1 powered device and a level-2 powered device connected to the level-1 powered device as a whole, and centrally performs power supply control and power management.

Abstract: In a powered device (PD), four MOSFETs are used in a rectifier circuit. The four MOSFETs are disposed based on a premise that an electric potential of a contact pair 1-2 is lower than that of a contact pair 3-6 and an electric potential of a contact pair 7-8 is lower than that of a contact pair 4-5, so that a PoE current of each contact group passes through only two of the MOSFETs but does not pass through a diode.

Abstract: In a powered device (PD), four MOSFETs are used in a rectifier circuit. The four MOSFETs are disposed based on a premise that an electric potential of a contact pair 1-2 is lower than that of a contact pair 3-6 and an electric potential of a contact pair 7-8 is lower than that of a contact pair 4-5, so that a PoE current of each contact group passes through only two of the MOSFETs but does not pass through a diode.

Abstract: A powered device (PD) used for power over Ethernet (PoE), where the PD includes an Ethernet port and a rectifier circuit. The rectifier circuit includes a first control circuit and a second control circuit, where the first control circuit is configured to control a first metal-oxide semiconductor field-effect transistor (MOSFET) and a second MOSFET, avoid turning on the first MOSFET and the second MOSFET at a PoE detection stage, and turn on at least one of the first MOSFET or the second MOSFET at a PoE power supply stage. The second control circuit is configured to control a third MOSFET and a fourth MOSFET, turn on at least one of the third MOSFET or the fourth MOSFET at the PoE power supply stage, and avoid turning on the third MOSFET and the fourth MOSFET at the PoE detection stage.

Abstract: A network device includes a power system, a processor, a power sourcing equipment PSE chip coupled to a first forward power supply port, and a first powered device PD chip coupled to a first reverse power receiving port. A first powered device is connected to the first forward power supply port and the first reverse power receiving port. When detecting that a power failure occurs on the network device, the processor instructs the first PD chip to draw power from the first powered device; the first PD chip draws the power from the first powered device through the first reverse power receiving port, and supplies the obtained power to the power system. Therefore, when a power failure occurs, the network device can continue to obtain power and work properly when the power failure occurs.

Abstract: A power over Ethernet method includes: performing, by power sourcing equipment, a plurality of detections by using an Ethernet port, connected to an intermediate device, of the power sourcing equipment, where a quantity of detections performed by the power sourcing equipment is equal to a quantity of power supply ports of the intermediate device; and if at least one detection result of the plurality of detections is effective, sending, by the power sourcing equipment, a power supply indication to the intermediate device, and supplying power to the connection port. In this way, the power sourcing equipment can supply power across the intermediate device to a powered device connected to the intermediate device, and a power loss caused by voltage conversion is avoided.

Abstract: A power over Ethernet (PoE) power supplying method where power sourcing equipment (PSE) and a powered device exchange link layer discovery protocol data units (LLDPDUs). Each of the LLDPDUs includes two power values. Each of the power values indicates requested or allocated power for one of two sets of cable pairs of the Ethernet twisted pair connecting the PSE and the powered device. Accordingly, the supplied powers to the powered device at sets of cable pairs are independent from each other.

Abstract: A Power over Ethernet method and device, where the Power over Ethernet method includes: determining, by PSE, a maximum power of a PD according to a classification class of the PD; obtaining, by the PSE, a length of a network cable between the PSE and the PD; determining, by the PSE, a type of the network cable; calculating, by the PSE, a loss power of the network cable according to the length of the network cable and the type of the network cable; and using, by the PSE, a sum of the maximum power of the PD and the loss power of the network cable as a supply power, to supply power to the PD. The Power over Ethernet method and device provided in the present disclosure improves usage efficiency of the PSE supply power.

Abstract: A power over Ethernet method where power sourcing equipment (PSE) detects and determines that a first set of cable pairs and a second set of cable pairs of an Ethernet twisted pair are connected to a valid powered device (PD), the PSE receives a link layer discovery protocol data unit (LLDPDU) from the PD, where the LLDPDU includes a load quantity type-length-value (TLV) used to notify a quantity of PD loads included in the PD, and when the PD receives power from both the first set of cable pairs and the second set of cable pairs, and the PD includes two PD interfaces, and the PD includes two PD loads, the PSE supplies power to the PD at a first power using the first set of cable pairs, and supplies power to the PD at a second power using the second set of cable pairs.