Multiple phase pulse power in a network communications system
AssigneeCisco Technology, Inc.
InventorsRichard Anthony O'Brien, Douglas Paul Arduini, Sung Kee Baek, Ruqi Li, Joel Richard Goergen
Life of this patent
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Abstract
In one embodiment, an apparatus comprises an input power interface for receiving input power, a power control system for transmitting DC (Direct Current) pulse power on multiple phases over a cable to a plurality of powered devices and verifying cable operation during an off-time of pulses in the DC pulse power, and a cable interface for delivery of the DC pulse power on the multiple phases and data over the cable to the powered devices. A method for transmitting multiple phase pulse power is also disclosed herein.
Claims32
An apparatus comprising:
- an input power interface for receiving input power;
- a power control system for transmitting DC (Direct Current) pulse power on multiple phases over a cable to a plurality of powered devices and verifying cable operation during an off-time of pulses in said DC pulse power;
- and
- a cable interface for delivery of the DC pulse power on said multiple phases and data over the cable to said plurality of powered devices;
- wherein the DC pulse power comprises voltage pulses with high voltage power delivered during a pulse on-time and low voltage power delivered during the pulse off-time with auto-negotiation line sensing between the power control system and each of the powered devices, the voltage pulses offset between said multiple phases to provide continuous power;
- and
- wherein the power control system is operable to transmit power and verify operation of the cable and the powered devices for each of the multiple phases before transmitting the DC pulse power.
An apparatus comprising:
- an input cable interface for receiving multiple phase DC (Direct Current) pulse power and data from power sourcing equipment over a combined power and data cable;
- an isolation switch for fault isolation of the apparatus;
- and
- an interface for transmitting power to an endpoint node;
- wherein the multiple phase DC pulse power comprises at least two phases to provide continuous DC voltage at the endpoint node and wherein off-time of pulses in the multiple phase DC pulse power is used to verify cable operation;
- wherein each phase of the multiple phase DC pulse power comprises voltage pulses with high voltage power delivered during a pulse on-time and low voltage power delivered during the pulse off-time with auto-negotiation with the power sourcing equipment, the voltage pulses offset between multiple phases to provide continuous power;
- and
- wherein power is received at the apparatus and fault isolation is performed at the apparatus and the isolation switch is synchronized with the power sourcing equipment before receiving the multiple phase DC pulse power.
A method comprising:
- receiving power at power sourcing equipment;
- transmitting the power to a plurality of powered devices and performing low voltage cable sensing to verify safety and integrity of a cable and the powered devices;
- phasing conduction of DC (Direct Current) pulse power over a plurality of wires to provide continuous DC voltage to the powered devices;
- simultaneously transmitting multiple phase pulse power and data signals associated with at least two of the multiple phases over the cable to said plurality of powered devices;
- and
- verifying operation of the cable and the powered devices during pulse power off-time;
- wherein the DC pulse power comprises voltage pulses with high voltage power delivered during a pulse on-time and low voltage power delivered during the pulse off-time with auto-negotiation line sensing between the power sourcing equipment and each of the powered devices.
Dependencies are inferred from the claim text.