With reference to FIG. 8, the RAU 14 includes power source equipment (PSE) 170. The PSE 170 is configured to direct power from a power line 171, which receives power from the power line 150 through the RF communications module 152, to PDs 156(1)-156(Q) connected to the powered communications ports 158(1)-158(Q). A controller 176 provided in the DDS module 154 coupled to memory 178 is configured to provide power management functions according to an available power budget received from the HEC 44, as will be described in more detail below with regard to FIGS. 9-11. By receiving the available power budget that can be provided from the power line 150 by the PSE 170 to power the PDs 156(1)-156(Q) connected to the powered communications ports 158(1)-158(Q), the PSE 170 can manage directing power to the PDs 156(1)-156(Q) connected to the powered communications ports 158(1)-158(Q) without depriving the other modules 152, 154, 160(1)-160(Z) present in the RAU 14 from receiving sufficient power to operate.
