[aprssig] APRStt software?

Bob Bruninga bruninga at usna.edu
Wed May 20 17:39:47 EDT 2009

>>> If I remember the APRStt spec correctly, 
>>> it actually requires a DB of callsign 
>>> shortcuts that might be quite a challenge...
>> That was abandoned in this new rendition of APRStt.
>> In this version, users always send their full callsign 
>> first (with overlay character).  After that, they can 
>> use only their 3 digit suffix (plus overlay character)
> Anytime someone can use a full callsign and follow 
> it up with a 3 digit suffix, the APRStt server 
> needs to be remembering the original to match 
> against for the shortcuts.  That's the part that 
> I was indicating a DB (or lookup table or some-such) 
> would be necessary and possibly a challenge for 

You need to remember that APRStt is only a first tier input system so only those that hit it direct need to be remembered.  My guess would be on the order of a 20 deep buffer, holding about 12 bytes each for a total of 240 bytes or so.

Bob, WB4aPR

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