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This Old Firehouse
"Power Over Ethernet Interoperability Guide" explains how to safely transmit DC power over an existing data network cabling structure so that separate AC electrical wiring is not be needed to power up devices connected to the network. Power over Ethernet (POE) technology is a system whereby electrical safety power, along with data, is safely passed to remote devices over Ethernet cabling. Safe transmission of power over Ethernet cabling prevents overheating of the cabling, injury to users/service personnel, and damage to legacy devices that were not designed to accept voltages on the Ethernet cable. This book fully covers everything you need to know about POE. Outlines how various devices--such as routers and RFID devices--can operate from power sent through Ethernet cables Provides information both ends of the cable--the sourcing side (PSE) and the sinking side (PD) Includes detailed coverage of the DC-DC switching converter--found on the PD side of the cable
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