a power system enclosure;

a first AC connector operable to receive AC (alternating current) input to said power system;

one or more redundant rectifier circuits connected to said AC connector and operable to convert AC to DC (direct current) power, said redundant rectifier circuits being operable to provide rated power output to one or more banks of load circuitry when one of said bridge rectifier circuits fails to meet one or more predetermined operating requirements;

a second connector operable to provide a plurality of ringer signal outputs;

a third connector operable to provide a plurality of fused heater outputs;

a fourth connector operable to provide a plurality of low voltage battery disconnect output signals;

a fifth connector operable to provide alarm outputs;

one or more auxiliary load overcurrent protected terminals for broadband circuitry;

one or more auxiliary battery terminals;

a sixth connector operable to provide overcurrent protected DC output voltages for use by RT banks of circuitry;

one or more fasteners for mounting each of said terminals on said enclosure;

one or more fasteners for mounting each of said connectors on said enclosure;

temperature compensating battery float voltage circuitry for providing a variable float voltage to maintain connected batteries as a function of temperature, said float voltage circuitry operating to prevent battery charging current from exceeding a predetermined value;

and a seventh connector connecting an output of said redundant rectifier circuit to supply DC current to both backup batteries and to banks of load circuitry simultaneously.