A system for controlling power to a cell tower, comprising: a plurality of tower top equipment units, each of the tower top equipment units having a remote radio head and a corresponding voltage sensor; a plurality of power supply units; and a controller coupled to the voltage sensors and the plurality of power supply units, wherein the controller is configured to receive a plurality of voltage samples from each of the plurality of voltage sensors, the voltage samples corresponding to power provided by each of the power supply units to a corresponding remote radio head, pre-filter each voltage sample, and issue a voltage command to each of the power supply units, wherein each voltage command corresponds to a pre-filtered voltage sample, characterized in that the controller is configured to perform a discovery scan between each of the power supply units and the tower top equipment units, the discovery scan comprising the steps of: commanding a first power supply unit to generate a first test voltage; receiving a first plurality of voltage samples from the plurality of voltage sensors; commanding the first power supply unit to generate a second test voltage; receiving a second plurality of voltage samples from the plurality of voltage sensors; identifying a first tower top equipment unit by identifying a responsive voltage sensor that responds to the first test voltage in the first plurality of voltage samples, and responds to the second test voltage in the second plurality of voltage samples; and storing an identifier corresponding to the first power supply unit and an identifier corresponding to a first remote radio head. a plurality of tower top equipment units, each of the tower top equipment units having a remote radio head and a corresponding voltage sensor; a plurality of power supply units; and a controller coupled to the voltage sensors and the plurality of power supply units, wherein the controller is configured to receive a plurality of voltage samples from each of the plurality of voltage sensors, the voltage samples corresponding to power provided by each of the power supply units to a corresponding remote radio head, pre-filter each voltage sample, and issue a voltage command to each of the power supply units, wherein each voltage command corresponds to a pre-filtered voltage sample, characterized in that the controller is configured to perform a discovery scan between each of the power supply units and the tower top equipment units, the discovery scan comprising the steps of: commanding a first power supply unit to generate a first test voltage; receiving a first plurality of voltage samples from the plurality of voltage sensors; commanding the first power supply unit to generate a second test voltage; receiving a second plurality of voltage samples from the plurality of voltage sensors; identifying a first tower top equipment unit by identifying a responsive voltage sensor that responds to the first test voltage in the first plurality of voltage samples, and responds to the second test voltage in the second plurality of voltage samples; and storing an identifier corresponding to the first power supply unit and an identifier corresponding to a first remote radio head. commanding a first power supply unit to generate a first test voltage; receiving a first plurality of voltage samples from the plurality of voltage sensors; commanding the first power supply unit to generate a second test voltage; receiving a second plurality of voltage samples from the plurality of voltage sensors; identifying a first tower top equipment unit by identifying a responsive voltage sensor that responds to the first test voltage in the first plurality of voltage samples, and responds to the second test voltage in the second plurality of voltage samples; and storing an identifier corresponding to the first power supply unit and an identifier corresponding to a first remote radio head.