Patent ID: 7509114
Filing Date: 2009-03-24
Classification: H04M

Abstract:
1. A redundant powering system for a powered device receiving power over communication cabling, the redundant powering system comprising: a redundant power supply comprising a first power sourcing equipment and a second power sourcing equipment; a powered device; and communication cabling connecting said redundant power supply to said powered device, said communication cabling comprising a first path connecting said first power sourcing equipment to said powered device and a second path connecting said second power sourcing equipment to said powered device, said first and second paths at least partially being constituted of a single structured cable wherein said first path is constituted of different conductors within said single structured cable than said second path, said powered device comprising at least one signature impedance, said redundant power supply being operative so that power is operably supplied to said powered device from only one of said first and second power sourcing equipment, and wherein at least one of said first power sourcing equipment and said second power sourcing equipment is operative to perform detection of said at least one signature impedance.