One power supply is standard with the MX48 chassis. However, an optional dual, redundant power supply is available to ensure continuous, uninterrupted power. The supplies are current sharing, which means the supplies share the load equally. If a power supply were to fail, the single power supply can handle the entire current load of the MX48 system. Although the router functions properly with one Power Module, it is recommended that, for redundancy, both Modules be connected to two independent power sources. Additionally, the hot-swappable feature allows for easy replacement of a module without interrupting the router’s system functionality.