Various embodiments are directed to techniques managing telephone numbers and other telecommunication identifiers when placing and receiving calls or messages from a single device. Code sections including original code and alternative code are retrieved from a code basis and the retrieved code is analyzed to detect an alternative code section. Pressure is applied to the tube. The voltage value is one or more of: a ratio of a normalized negative sequence voltage to a modulation index, an RMS voltage for each phase, and total harmonic distortion of each phase current.