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The ProCurve 620 Redundant/External Power Supply provides redundant system power and/or an extra 398 watts of PoE power for two supported switches simultaneously. Ideally suited for VoIP environments, the 620 provides the RPS and extra PoE power needed in many other common customer environments where high power availability is desired. Switchover from a failed internal power supply to the 620 is seamless and immediate. In addition, the 620 can provide a full power cord redundancy solution that can protect against a single power main failure. The 620 supports the ProCurve 2900 series, 3500yl series, and 6200yl switches.