> If I remember correctly, the KPC-2 was a dual-port TNC that had two 1200 baud ports on it. The KPC-4 was the dual port unit. KPC-2 was the basic TNC before (surprise) the KPC-3. I have a KPC(-no number) from the mid 80's that works fine in KISS mode on Linux AX25... Bill - WA7NWP