Comments... The PacTOR Level mode is a function of the Data Controller, not the software. At this time the SCS PTC Data controllers are the only ones that use PacTOR 2 or 3. Therefore to use PacTOR 2, 3 the series of SCS PTS controllers needs to be supported. Any dual port TNC (KAM, KPC9612, PTC, DRSI, etc,) should be supported for both ports to be used independently.(DRSI boards are ISA) bud N0IA