Patent ID: 8885660

Claim:
A method carried out in a device that is coupled to first and second wirings, the device including a single enclosure housing first and second transceivers, a transformer, and a device power supply, the method comprising: carrying out a first full-duplex serial data communication over the first wiring that simultaneously carries DC power and first data signals, the first full-duplex serial data communication enabled by the first transceiver; carrying out a second full-duplex serial data communication over the second wiring, the second full-duplex serial data communication enabled by the second transceiver; employing the transformer to pass only first data signals between the first wiring and the first transceiver; feeding power to the device power supply from a source external to the single enclosure, the device power supply coupled to the first and second transceivers to power the first and second transceivers; providing the DC power from the device power supply, via a center-tap of the transformer, onto the first wiring; and storing an address associated with the device that enables network communications to be addressed to the device.