To secure an ADSL connection to an ADSL transceiver connected to a telephone line to be used also by an associated telephone, the telephone is normally kept disconnected from the telephone line and a predetermined number of bits is allocated to the ADSL connection. The sustained release dosage form provides via once-a-day dosing a therapeutically effective average steady-state plasma alprazolam concentration, where the maximum attained plasma concentration is achieved more than about 14 hours after administration. Phase shifting is achieved by selectively and variably controlling amplification of the field-effect transistors.