The FlexPoint 1230, 30Watt, 12Vdc standby power supply is an environmentally hardened standby power supply intended to be placed in indoor or outdoor in sheltered locations providing the service provider flexibility in locating the product. The FP1230 is compact allowing placement in the most densely populated structured medial enclosures. The FP1230 includes a unique emergency battery reserve function that provides greater lifeline service availability by preserving 25% of the usable battery capacity for user initiated emergency telephone calls. User interfaces include visual status indicators, audible alarms, silence alarm button and an auxiliary 12VDC power input port allowing additional battery capacity to be added for longer standby runtimes.