An adaptive inductive ballast is provided with the capability to communicate with a remote device powered by the ballast. The delivered trial-listening music data is actually reproduced by the portable telephone; however, the number of reproduction times is limited, and the trial-listening music data is erased from a memory of the portable telephone after the trial-listening music data is reproduced for the predetermined number of reproduction times. The transaction request is sent over one of the pipes from a source to a target and includes a non-addressed transaction command. The oil flows from the groove into the gutter, and then flows to the annular ring or topside of the main bearing frame to provide lubrication. In another aspect of the invention the plurality of interferometers are configured to optically compensate for any Doppler shift differences among the mixed optical interference signals.