The hp 630 740w redundant power supply provides redundant system power andor an extra 398w of power over ethernet and power over ethernet plus poe power for a switch ideally suited for voice over ip voip environments the 630 power supply provides the redundant power supply 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 630 power supply is seamless and immediate in