Fast, all optical switching of light is provided on silicon, using highly light confining structures to enhance the sensitivity of light to small changes in refractive index. The ultrasonic imaging system efficiently addresses the data computational and processing needs of Doppler processing. The host device then enables a user to select a field device for configuration from the displayed list, and causes only the selected wireless field device to generate a human perceivable signal, thereby enabling a user to correlate a wireless field device listed in the display with the actual physical field device present in the vicinity. After treatment of surgical wounds, combat wounds, trauma and emergency wounds, the modified starch hemostatic material is rapidly absorbed by the body without the complications associated with gauze and bandage removal. They are PFET1, PFET2, NFET1, and NFET2. In an example, a physical layer configured to communicate over a plurality of upstream channels is provided.