A modified preamble is used by extended devices that operate at higher rates, MIMO or other extensions relative to strict 802. The connector side includes one first and second main connection area for connecting first and second main lines to first and second fixed main contacts disposed in the interior of the housing. The time spaced signals convey at least one intelligence signal. The magnetic field sensor may also or alternatively detect the speed andor direction of rotation of a rotating magnetic article. Portions of the sourcedrain region immediately adjacent the interface define a carrier accumulation layer having a greater carrier concentration than other portions thereof.