[Xastir] dual port TNC

[Wes Johnston, AI4PX]

How does xastir deal with a dual port TNC such as the KPC4?  Incoming
packets are ID'ed by port number (ie 0 or 1).  When they are digipeated are
they digipeated out on same port they were heard on, or is the port ID
stripped and port 0 substituted?  Can ports be "bridged"?

I'm asking because I'm considering using such a dual port TNC that would
allow us to work regular aprs on 144.39 and track aircraft on another
frequency and I may want to bridge them at times and not other times.

-- 
Wes
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Where there's silence, there is no Hope.