The E620 Redundant/External Power Supply provides redundant system power and/or an extra398 W of Power over Ethernet (PoE) power for each of two supported switches simultaneously. Ideally suitedfor Voice over IP (VoIP) environments, the E620 provides the RPS and extra PoE power needed in many othercommon customer environments where high power availability is desired. Switchover from a failed internalpower supply to the 620 is seamless and immediate. In addition, the 620 can protect against a single powermain failure by being connected to a different power main than the switch. The 620 supports the HP E3500 Series, as well as E6200 switches.Additional information• Independent RPS and EPS ports: two RPS ports provide system power for up to two switches simultaneously and two EPS ports provide PoE power for up to two switches simultaneously