A system receives a set of datagrams and forms frames based on the datagrams, where at least one of the frames includes data associated with multiple ones of the datagrams. The second PHY device receives a first request transmitted on a second channel and in response to receiving the first request, determines whether the first PHY device is receiving the first data. The high temperatures and high pressures resulting from cavitation disrupt the emulsion thereby liberating existing lighter hydrocarbons in the diesel range or lighter for recovery via more traditional separation technologies. A top portion of the tubular wire frame is uncovered by filter fabric to define an overflow opening for storm water with very light sediment to flow into the storm water pipe. The plenum chamber receives cooling air flow from a supply opening and communicates that air to an end portion through a plurality of impingement openings that provide impingement flow of cooling air outboard of the restriction.