A method and system for determining one or more desired communication services for an application. The movable body can be slid straightly with respect to the static body. The pitch side optical system further consists of a coupler optically coupled to the far end of the pitch side optical fiber and the far end of an unmultiplexed input optical fiber with the coupler combining the multiplexed laser light and the unmultiplexed laser light and outputting the combined light to a transmission optical fiber. The command line includes at least one operation which may be executed in parallel on the controller based hardware. By increasing the packet payload size in the VoIP packets, the voice gateway can switch the same amount of audio data in fewer VoIP packets. The pressure control device is fitted within the housing and includes a conductive outer casing engaging the fuel tube and forming an electrical pathway.