The HP 630 740W Redundant Power Supply provides redundant system power and/or an extra 398W of Power over Ethernet & Power over Ethernet Plus (Po E+) power for a switch. Ideally suited for Voice over IP (Vo IP) environments, the 630 power supply provides the redundant power supply (RPS) & extra Po E power needed in many other common customer environments where high power availability is desired. Switchover from a failed internal power supply to the 630 power supply is seamless & immediate. In addition, the 630 power supply can protect against a single power main failure when it is connected to a different power main than the switch.