Troubleshoot/POE IEEE 802.3at 2009 vs IE 802.3AF 2003

POE: IEEE 802.3at-2009 vs. IE 802.3AF-2003

This technology is especially useful for powering IP telephones , wireless LAN access points, IP Camera and Cameras with pan tilt zoom(PTZ), POE injectors, remote Ethernet switches, embedded computers , thin clients and LCDs.

Dahua POE Switch

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POE: IE 802.3AF-2003 The original IEEE 802.3af-2003 PoE standard provides up to 15.4 W of DC power (minimum 44 V DC and 350 mA) to each device. Only 12.95 W is assured to be available at the powered device as some power is dissipated in the cable.

POE: IEEE 802.3at-2009 The IEEE 802.3at-2009 PoE standard, sometimes called "POE+ or POE PLUS", (Ratified September 11, 2009), provides up to 30 watts) and 25.5 W of DC power is assured to be available at the powered device as some power is dissipated in the cable.

POE in Back of Dahua NVR

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Dahua POE Injector

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