[aprssig] APRStt lives! (APRSspeak)

[Robert Bruninga]

> If you pass out a pl tone for the event, could you not just 
> provide them a short dtmf code to associate to there call
sign?

Yes.  The APRStt spec fully allows for tactical calls as short
as 3 digits.  The assumption is that for a local special event,
everyone will probably be assigned these shorter calls to keep
the air-time down.

But still everyone can also use their fully spelled out 16 digit
DTMF callsign as well for other applications.

Bob, WB4APR