A milling tool holder having a spindle with a tapered opening and a tool holder having a tapered shank that fits into the spindle opening. If the SFP module is coupled a host that only implements the 1000Base-X protocol then the SFP module translates the 1000Base-X protocol to the 1000Base-T protocol so that the host MAC sees the 1000Base-T SFP module as if it were an optical transceiver. The power of the radar need only be about 190 w.