Methods for forming interconnects in microfeature workpieces, and microfeature workpieces having such interconnects are disclosed herein. The interface circuitry presents a 6-pin audio port configured to couple the military handset to the interface circuitry. The coupler comprises: a conduit having an internal channel therein, a distal end, a proximal end, a first opening in the distal end connecting to the internal channel and a second opening in the proximal end connecting to the internal channel. The module is further adapted to receive SALT application program interfaces pertaining to recognition of the input.