The methods bypass present lengthy modem renegotiations to effect fast reestablishment of ISO Application-Oriented Layer communication link between user Application ProgramsBrowsers and Internet Service Provider, and enables complete session continuity without user being aware of noticeable difference due to frequent connectionsdisconnections of PSTN line. The apparatus essentially comprises optical fiber vibration sensors, a spherical ejector rod, and a signal-emitting device installed in a housing, inside a pipe, to determine solid-fuelair ratios and their rate of flow simultaneously. The method further comprises selecting an effective energy-saving device to be introduced, and surveying an operating state of the fluid machinery. The second segment size represents a maximum segment size that can be transmitted.