The dps 700 redundant power supply rps is designed to conform to the wattage requirements of d links ethernet and gigabit switches it is external rps units enclosed in solid metal cases with sockets to ac or dc power sources on one end and connect to a switchs internal power supply on the other end it provides a low cost simple solution to the problem of an inadvertent failure of the internal power supply of an ethernet switch which can result in the shutdown of that switch the devices