Crestron Electronics, Inc.

Crestron Electromics, Inc.

John Hartnett

Mark LaBosco

Marc Dubowski

Described herein is a data communication system using power over Ethernet (PoE) for power distribution, comprising a first and second powered device (PD), each of which is adapted to communicate with each other through an Ethernet data path (EDP) and is further adapted to receive direct current (DC) power using a PoE protocol, and a mid-span power injection device (MSPID) adapted to provide a communications interface such that data communications passes through the MSPID to and from each of the PDs, and wherein the MSPID is further adapted to provide a first DC power to only the first PD using the EDP, and to provide a second DC power to only the second PD using the EDP.

Dual sourcing power over ethernet on a single data path

A Power over Ethernet (PoE) Powered Device () is described herein that includes an auxiliary processor () that negotiates a power level with a PoE Power Sourcing Equipment using a first link layer (), means for holding the PoE Powered Device in a low power state, and a second link layer () that allows the main processor to communicate over the Ethernet.

PoE powered device with link layer startup processor

An inventive Power over Ethernet (PoE) Powered Device () includes an auxiliary processor () which negotiates a power level with a PoE Power Sourcing Equipment using a first link layer (), means for holding the PoE Powered Device in a low power state, and a second link layer () which allows the main processor to communicate over the Ethernet.

Growing community of inventors

Cortlandt Manor, NY, United States of America

John Hartnett