An aerodynamic drag reducing apparatus for use with vehicles having downstream surfaces that are not streamlined. While, when the optical receptacle of the transceiver is free from the optical connector, the tailed finger protrudes into the optical receptacle and no influence is affected to insert the transceiver into or to extract the transceiver from the cage. Depending on the particular embodiment, the dynamic SOC operating range may have different combinations of hard andor soft boundaries or limits. And, the semiconductor structure is treated. The strobes also clock a counter whose output is fed to a decoder.