Methods and apparatus for communicating Fiber Channel frames between a private loop device and an Ethernet link through a Fiber Channel private loop device interconnect system. In addition, the microstimulators are capable of producing unidirectionally propagating action potentials. 0% or less, Mn: 3% or less, P: 0. The water recess is provided on the top surface. Heating of the green ceramic core in this manner conforms the core to a surface of the setter to reduce distortion of the core and improve yields of cores that are within preselected dimensional tolerances.