A method for controlling power supply and a system are disclosed. The method includes: receiving an idle communication indicative instruction sent by a field energy supply device through a communication path; sending a waiting time extension instruction to the field energy supply device through the communication path, to instruct the field energy supply device to supply field energy continuously; and receiving a response to the waiting time extension instruction sent by the field energy supply device through the communication path, closing the communication path, and supplying with power by utilizing the field energy through a power supply path.

A method for controlling power supply and a system are disclosed. The method includes: receiving an idle communication indicative instruction sent by a field energy supply device through a communication path; sending a waiting time extension instruction to the field energy supply device through the communication path, to instruct the field energy supply device to supply field energy continuously; and receiving a response to the waiting time extension instruction sent by the field energy supply device through the communication path, closing the communication path, and supplying with power by utilizing the field energy through a power supply path.

The present disclosure provides a fast charging method, a power adapter, and a mobile terminal. The method includes: transmitting, by the power adapter, a clock signal to the mobile terminal via a first data line of a USB interface in a process of coupling the power adapter with the mobile terminal, where the clock signal is configured for indicating a communication sequence between the power adapter and the mobile terminal; conducting, by the power adapter, a bidirectional communication with the mobile terminal via a second data line of the USB interface under control of the communication sequence, so as to determine to charge the mobile terminal in a fast charging mode; and adjusting, by the power adapter, a charging current to be a charging current of the fast charging mode to charge the mobile terminal.

The present disclosure provides a fast charging method, a power adapter, and a mobile terminal. The method includes: transmitting, by the power adapter, a clock signal to the mobile terminal via a first data line of a USB interface in a process of coupling the power adapter with the mobile terminal, where the clock signal is configured for indicating a communication sequence between the power adapter and the mobile terminal; conducting, by the power adapter, a bidirectional communication with the mobile terminal via a second data line of the USB interface under control of the communication sequence, so as to determine to charge the mobile terminal in a fast charging mode; and adjusting, by the power adapter, a charging current to be a charging current of the fast charging mode to charge the mobile terminal.

In one embodiment, a method includes receiving power delivered over a data fiber cable at an optical transceiver installed at a network communications device and transmitting data and the power from the optical transceiver to the network communications device. The network communications device is powered by the power received from the optical transceiver. An apparatus is also disclosed herein.

The present invention relates to an apparatus for reverse power feeding in accordance with communication line environments and a method thereof, which measure line resistance (e.g., a difference in impedance depending on a distance between a customer premise (CP) and a distribution point (DP)) of a communication line (e.g., a twisted pair copper wire) connected to a distribution point at a customer premise and reflect the measured line resistance to perform stable power feeding to the distribution point.

The present invention relates to an apparatus for reverse power feeding in accordance with communication line environments and a method thereof, which measure line resistance (e.g., a difference in impedance depending on a distance between a customer premise (CP) and a distribution point (DP)) of a communication line (e.g., a twisted pair copper wire) connected to a distribution point at a customer premise and reflect the measured line resistance to perform stable power feeding to the distribution point.

Power is supplied to telecom equipment in DSLAM outdoor/remote cabinets with relatively short distances between the subscriber and the cabinet. All of the subscriber Customer Premises Equipment connected to the DSLAM each provide a portion of the required power to the remote cabinet via the telephone line connecting the DSLAM and the subscriber CPE. The CPE at the subscriber premises is already connected to power mains in the subscriber premises so, providing power, via the telephone line to the outdoor cabinet is relatively simple. The remote cabinet includes a circuit for receiving the power input from each subscriber and then distributing the power, required by the DSLAM load, equally among the subscribers.

Power is supplied to telecom equipment in DSLAM outdoor/remote cabinets with relatively short distances between the subscriber and the cabinet. All of the subscriber Customer Premises Equipment connected to the DSLAM each provide a portion of the required power to the remote cabinet via the telephone line connecting the DSLAM and the subscriber CPE. The CPE at the subscriber premises is already connected to power mains in the subscriber premises so, providing power, via the telephone line to the outdoor cabinet is relatively simple. The remote cabinet includes a circuit for receiving the power input from each subscriber and then distributing the power, required by the DSLAM load, equally among the subscribers.

A charging method includes the follows. A battery of a terminal device is determined to be charged in a charging mode based on that current status of the terminal device satisfies a condition that the battery of the terminal device is operable to be charged in the charging mode. A communication with the terminal device is conducted to determine a charging voltage or a charging current of the charging mode. An output voltage or output current output to the terminal device is adjusted to enter a constant current phase. A communication with the terminal device is conducted during the constant current phase to receive information of a current voltage of the battery. The output current output to the terminal device is adjusted according to the current voltage of the battery in the constant current phase. A related terminal device and power supply device are also provided.