Patent ID: 8680706

Claim:
A first device comprising: a network interface; and a first communication module configured to couple with a first transmission medium for distributing power using a first voltage waveform having a first amplitude in a network that also comprises a second transmission medium for distributing power using a second voltage waveform having a second amplitude different from the first amplitude, wherein the first transmission medium is coupled with the second transmission medium; the first communication module further configured to: utilize signals that propagate between the first and second transmission media for communication with a second communication module of a second device coupled with the second transmission medium; and implement a modulation scheme that enables propagation of the signals from the first transmission medium to the second transmission medium, wherein the modulation scheme further configures the first communication module to select a pair of subcarrier frequencies for Frequency Shift Keying (FSK) modulation from a plurality of subcarrier frequencies used for Orthogonal Frequency Division (OFDM) modulation.