Cisco Technology, Inc.

Richard Anthony O'Brien

Joel Richard Goergen

Chad M Jones

Douglas Paul Arduini

Sung Kee Baek

Jason DeWayne Potterf

George Zimmerman

Ruqi Li

Daniel Lee Barsotti

Kan Seto

Shobhana Punjabi

Paul Lachlan Mantiply

Straty Argyrakis

M Baris Dogruoz

John Beecroft

George Allan Zimmerman

In one embodiment, a method includes receiving low voltage pulse power from power sourcing equipment at a powered device, synchronizing the powered device with a waveform of the low voltage pulse power received from the power sourcing equipment, and operating the powered device with high voltage pulse power received from the power sourcing equipment.

Initialization and synchronization for pulse power in a network system

In one embodiment, a method includes receiving at a remote network device, power and data from a central network device, wherein the power is used to power the remote network device, performing auto-negotiation with the central network device, wherein the auto-negotiation includes operating the remote network device in a low voltage mode during fault sensing of a power circuit at the remote network device, and selecting a power operating mode, wherein selecting the power operating mode includes selecting a high voltage mode if no fault is detected during the fault sensing, the high voltage mode comprising DC (direct current) pulse power. An apparatus is also disclosed herein.

High power and data delivery in a communications network with safety and fault protection

In one embodiment, a method includes transmitting multi-phase pulse power from power sourcing equipment to a powered device in a data center, wherein the multi-phase pulse power comprises multiple phases of power delivered in a sequence of pulses defined by alternating low direct current voltage states and high direct current voltage states, and synchronizing the pulses at the power sourcing equipment with the pulses at the powered device.

Multi-phase pulse power short reach distribution

In one embodiment, a method includes transmitting pulse power on two wire pairs, the pulse power comprising a plurality of high voltage pulses with the high voltage pulses on the wire pairs offset between the wire pairs to provide continuous power, performing low voltage fault detection on each of the wire pairs between the high voltage pulses, and transmitting data on at least one of the wire pairs during transmittal of the high voltage pulses. Data transmittal is suspended during the low voltage fault detection.

Transmission of pulse power and data in a communications network

In one embodiment, a method includes identifying at a first powered device in communication with power sourcing equipment, a second powered device in communication with the first powered device, wherein the first powered device is receiving high voltage pulse power from the power sourcing equipment, notifying the power sourcing equipment of the second powered device at the first powered device, and performing a low voltage power initialization at the first powered device with the second powered device before passing the high voltage pulse power to the second powered device.

In one embodiment, an apparatus generally comprises a printed circuit board comprising a first side, a second side, and a plurality of power vias extending from the first side to the second side, the first side configured for receiving an application specific integrated circuit (ASIC), and a power delivery board mounted on the second side of the printed circuit board and comprising a power plane interconnected with power vias in the power delivery board to electrically couple voltage regulator modules and the ASIC. The voltage regulator modules are mounted on the second side of the printed circuit board.

Integrated power delivery board for delivering power to an ASIC with bypass of signal vias in a printed circuit board

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.

Multiple phase pulse power in a network communications system

In one embodiment, a method includes transmitting from power sourcing equipment, low voltage pulse power to a powered device in a communications network, performing a safety test, enabling high voltage pulse power operation at the power sourcing equipment upon passing the safety test, and transmitting high voltage pulse power from the power sourcing equipment to the powered device. The powered device synchronizes with a waveform of the low voltage pulse power.

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Livermore, CA, United States of America

Richard Anthony O'Brien