Devices and methods for a communication device having at least one power supply unit coupled to a power connector for providing an operating power for operation of network modules of the communication device and a PoE power for the ports connected to Power over Ethernet (PoE) devices. The PoE power includes a consumable power to power up at least one PoE devices and a leftover power. Further, a PoE power harvester adapter is coupled to a power connector to convert the leftover PoE power into additional operating power for operating additional network modules.