The quad redundant power supplies ensure continuous, uninterrupted power. The supplies are current sharing which means the supplies equally share the load. If a power supplys were to fail, a single power supply can withstand the entire current load of the HDX Router system. Although the HDX Routers functions properly with one Power Module, it is recommended that all Modules be used, preferably connected to four independent power sources (for redundancy). Additionally, the hot-swappable feature allows for easy replacement of a module (in case of failure) without interrupting the HDX Routers system functionality.