[FADCA] RFDCD on Spirit 2 TNCs

[bud thompson]

Pin 5 on the standard TAPR 5-pin TNC connector is the RF DCD - or external DCD for the purpose of inhibiting the TNC TX when an external DCD line is connected to pin 5.  I can't find any reference in the Sprint, Spirit, or Tiny-2 technical manuals if this line must go to ground or go high to inhibit TX.  

In the Kantronics 1200b connector Pin 2 of the 9-pin connector is used as the external carrier detect.  When pin 2 is grounded, TX is inhibited.

Is the logic the same for  the Paccomm TNCs?

That would be 'logical.'

bud N0IA