A method of adjusting Raman gain in an optical amplifier assembly. The transmission takes place with the aid of a special gateway unit, wherein the gateway unit \u2018listens to each or to a chosen mode of operation ,\u2018receives the transmission occurring in one mode of operation, and\u2014transmits the received transmission to the other mode of operation. As the vibrator is arranged to support the weight at its center of gravity, a characteristic relationship is observed between the acceleration, such as angular acceleration or translational acceleration, and the size of electric charges and the polarity. The time stamps are added at the physical layer so that the time stamps correspond to the time the data packets are placed onto and received from the asynchronous network. The holding apparatus makes possible ergonomic positioning of a work aid, for example a laptop. The mold layer, the etching stopper, and the node supporting layer are patterned, thereby forming opening holes exposing the conductive pads.