Cisco Technology, Inc.

Daniel Lee Barsotti

Joel Richard Goergen

Chad M Jones

Douglas Paul Arduini

Sung Kee Baek

Richard Anthony O'Brien

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 receiving power at an optical transceiver module at a remote network device on a cable delivering power and data from a central network device, operating the remote network device in a low voltage startup mode during fault sensing at the remote network device, transmitting on the cable, a data signal to the central network device, the data signal indicating an operating status based on the fault sensing, and receiving high voltage power from the central network device on the cable at the remote network device upon transmitting an indication of a safe operating status at the remote network device, wherein the remote network device is powered by the high voltage power. An apparatus is also disclosed herein.

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Sacramento, CA, United States of America

Daniel Lee Barsotti