A telephony data switching method includes receiving data from a first party and determining whether the data from the first party is substantially all speech data. A coil-like or zigzag-like linear fastener element row is attached to a fastener tape with a multi-filament attachment yarn or a sewing yarn of double lock sewing system. A base top member includes a downwardly extending inner tubular portion and a lower interior edge surface with a helical lower surface forming an adjustable helical aperture in cooperation with the bottom helix member, and a recessed inner helical lip is configured to receive the upper helical surface of the bottom helix member for adjusting a helical aperture. The plug can further comprise a knob having a bulbous portion sized to fit in a palm of a user’s hand for ease of grasping by the user. An authentication, authorization and accounting server which is designed for use with both of these networks is disposed in the telecommunication system in such a way that user data of the user terminal stored in the AAA server can be accessed from both of these networks, thereby advantageously ensuring uninterrupted switching between the two networks free of loss.