A telecommunications network offers a subscription plan or feature for parent and activity-based child devices. Several systems are disclosed wherein partitioned pipes, pumps, partitioned headers, check valves, and scoop inserts are used to keep the water in movement inside the pipes. The signal comprises a known signal and an information signal. The method additionally comprises forming an etch stop layer over the dielectric layer and covering a portion of a top surface of the connecting line. A chamber, partitioned from the annular space by the cup-shaped diaphragm, serves as a damper chamber which has a diameter substantially equivalent to a diameter of the bore. The RF receiver includes an antenna for receiving an RF signal, an amplifier for amplifying the RF signal, a mixer connected to the amplifier, for converting the RF signal to an IF signal, and an AGC for converting the power level of the IF signal received from the mixer to be within a predetermined range.