[aprssig] APRStt works!

Brett Friermood brett.friermood at gmail.com
Sun Mar 17 15:51:32 EDT 2013

One question I have had for while is whether the DTMF callsign can be used
to legally ID, or would one have to voice ID as usual? Since it is a unique
string (hash?) for each callsign using a published format, does this meet
the requirements?

Brett KQ9N
On Mar 17, 2013 2:15 PM, "Robert Bruninga" <bruninga at usna.edu> wrote:

We used APRStt successfully yesterday to allow anyone with any HT to report
their positions along our Marathon by entering only the DTMF code “B1MM*…”
followed by their callsign from DTMF memory.  The MM number was converted
by a lookup table to the exact position of the mile mark.  Further, anyone
could report themselves anywere in the 10 mile grid to the nearest 600’ or
so using the DTMF format “B2XXYY*…

We think that has great potential to expand the use of APRS at events,
since everyone in the club could input data, not just the 10% that had APRS

See the web page:


More to come when Byonics eventually decides to make these DTMF adapters
available.  Right now, only 3 of us have alpha models for experimentation.
But be thiking of how you can use EVERYONE in  your club at your next event
to enter data.  For example, how we report Boy Scout troop scores at our
camporees:  http://aprs.org/aprsevent.html

Our local Repeater owner also said he would be happy to put an APRStt
decoder on the repeater input so that non-APRS mobiles in the area could
easily be seen on APRS too…

Bob, WB4aPR

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