A method and apparatus for testing a VoIP telephone line are provided, the method including determining which of a plurality of VoIP call control protocols andor CODECs is compatible with the telephone line, and conducting a series of tests on the telephone line in accordance therewith. The computer system initially undergoes filtering of the incremental patterns under study. The controller cooperates with the wireless receiver and the satellite radio receiver to ascertain whether a satellite signal received by the satellite receiver has a predetermined relationship with the local signal. The current signal is amplified and converted into a voltage signal via a transimpedance amplifier.