A method of manufacturing a fiber optic cable includes steps of extruding a first jacketing material around strength members, over armor, and to form a cavity between the strength members and beneath the armor. On the pimary side of the barrier, a voltage driver drives a digital transmit data stream, that is encoded to be DC balanced in both current and voltage domains, across the barrier. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into PHVAH through backcross conversion andor transformation, and to the maize seed, plant and plant part produced thereby.