Patent ID: 6449136
Filing Date: 2002-09-10
Classification: H04M

Abstract:
A system for supplying DC power to a plurality of optical network units (ONUs) in a fiber to the curb (FTTC) network, comprising:an AC-DC rectifier for converting AC power to a first DC power level; a DC-DC converter coupled to the AC-DC rectifier for converting the first DC power level into a second DC power level, wherein the DC-DC converter includes a plurality of power outputs for supplying the second DC power level to each of the plurality of ONUs; and a plurality of active current limiters coupled between the plurality of power outputs from the DC-DC converter and the ONUs, wherein the active current limiters are configured to provide a constant output voltage to the ONUs up to a predetermined maximum current value, at which point the active current limiters provide a constant current at the maximum current value.