[aprssig] APRStt lives! (APRSspeak)

[Wes Johnston, AI4PX]

This was discussed at Dayton, and what I'd love to see is that the APRS TT
decoder software would read the PL or DCS tone that is being sent as the
DTMFs that represent my callsign are being sent.  This would create a mapped
entry.

Let's say I send PL 156.7 and the string of DTMFs that represent AI4PX.  The
software then associates PL 156.7 to my callsign and all  have to do is
enter my position DTMFs.

Bob would be happy to have us manually setup the mapping between PL/DCS
tones and callsigns, but I think it would be even easier to have the
software do the mapping over the air.  Any mappings would expire after 24 or
48 hours... so the next weekend or race when the software was used, it would
start with a clean slate.

So what happens when Joe Ham comes along and uses PL 156.7 to map to his
callsign?  Since I already "took" that PL tone, the software would respond
by voice and tell Joe that the 156.7 slot was taken and suggest the next
blank slot. I don't think we'd want it telling Joe that the tone was
assigned to ai4px, that might lead to many queries and a heck of a lot of
mischief.  Automatic assignment would facilitate people simply arriving on
scene and "checking in" without having to find the person who knows how to
program the callsign mapping.

The difficulty I see in this after thinking about it on the way home today
is that is someone forgets to turn off PL tones that they may have left on
in their radio.... Somone could easily "hijack" my position, but then again,
someone accidentally playing a PL tone wouldn't be just sending position
info in the first place... THey might key up and speak on the simplex
frequency w/o realizing they used my PL tone, no harm, no foul.

Wes
---
God help those who do not help themselves.


On Mon, May 17, 2010 at 19:02, Robert Bruninga <bruninga at usna.edu> wrote:

> APRStt (touch tone)
> Which lets anyone with any HT participate in APRS, not just
> those with APRS radios was working at Dayton 2010.  Both a
> software version (WA2UPW) and a hardware version (Byonics) were
> presented.  This email describes the software version:
>
> Doug KA2UPW wrote APRSspeak that listens for DTMF users on
> 146.58 and responds to them with APRS info by voice.  It is
> Wondows software that uses its sound card for DTMF reception and
> Voice response.  On the other side of the gateway, it
> communicates with APRSdom via a TNC on the national APRS
> channel.
>
> When a DTMF user sends his DTMF callsign (from his DTMF memory)
> he is acknowledged by APRSspeak by voice and his position is
> sent out on APRS in the vicinity of the APRSspeak node that
> heard him (and globally via the APRS-IS).  The DTMF user can
> further refine his position by sending a separate DTMF position
> report if finer resolution position is needed.
>
> Again, only hearing the callsign is sufficient to place the user
> on the map.  But an additional DTMF position report using 5 key
> presses (B1XY*) could place him anywhere within about 150 feet
> on the 1 digit X/Y grid map handed out.  A 7 key position report
> (B2XXYY*) could place them anywhere to the nearest 15 feet if we
> had implemented it.
>
> The POWER of APRStt and APRSspeak is that it lets 100% of a club
> or all volunteers at a special event communicate inportant
> information, not just the 10% that have APRS capability.  Not
> just position, but  simple messages and numeric data can be
> sent.
>
> Although APRStt (APRSspeak and the Byonics APRStt hardware
> module) are not yet ready for prime time, everyone needs to
> start thinking of how they can use this capability in their area
> for their club and special event activities.  I think this time
> it will be a GO! With proper planning, it can be very valuable
> in involving all of Amateur Radio.
>
> See www.aprs.org/aprstt.html and
> www.aprsspeak.com
>
> Doug says he will use the above site when his software is ready
> for distribution.
>
>
>
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