Patent ID: 7152175

Claim:
A system, comprising: a plurality of power input lines; and a power supply facility configured to provide a combined set of signals including a power signal and an identifier over each of the plurality of power input lines, wherein the power supply facility comprises: a first uninterruptible power supply and a first power input line, wherein the first power input line is configured to convey a first combined set of signals provided by the first uninterruptible power supply, the first combined set of signals including a first power signal and a first identifier; a second uninterruptible power supply and a second power input line, wherein the second power input line is configured to convey a second combined set of signals provided by the second uninterruptible power supply, the second combined set of signals including a second power signal and a second identifier; and wherein the system further comprises a redundant system coupled to receive each of the first and second combined sets of signals, the redundant system including control logic configured to determine whether the first uninterruptible power supply is providing power separately and distinctly from the second uninterruptible power supply.