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And for a good introduction on why your APRS message may or may not
make it across the -IS/RF boundary, read:<br>
<br>
<a class="moz-txt-link-freetext" href="http://aprsisce.wikidot.com/doc:aprs-messaging-explained">http://aprsisce.wikidot.com/doc:aprs-messaging-explained</a><br>
<br>
It talks about -IS to -IS messaging (nearly always works), RF to RF
messaging (works if you're in simplex or digipeater range), as well
as RF to -IS to RF (least reliable as it requires properly
configured (read: transmitting) IGates on both ends).<br>
<br>
Lynn (D) - KJ4ERJ - Author of APRSISCE for Windows Mobile and Win32<br>
<br>
On 3/20/2012 9:45 AM, Mike Goldweber wrote:
<blockquote
cite="mid:20120320064538.6285e77fd289b2245967c6ea4157de00.ca3bcc6187.wbe@email09.secureserver.net"
type="cite"><span style="font-family:Verdana; color:#000000;
font-size:10pt;">
<div>Hi Eric,</div>
<div><br>
</div>
<div>This makes sense, and it clarifies some other observations
I've made recently. Thank you very much for explaining it.
This gives me some more things to explore.<br>
</div>
<div><br>
</div>
<div>Sincerely,</div>
<div>Mike</div>
<div>KB3IXO</div>
<div><br>
</div>
<blockquote id="replyBlockquote" webmail="1" style="border-left:
2px solid blue; margin-left: 8px; padding-left: 8px;
font-size:10pt; color:black; font-family:verdana;">
<div id="wmQuoteWrapper">
-------- Original Message --------<br>
Subject: Re: [aprssig] radio aprs vs internet aprs<br>
From: Eric Lorenz K9LGE <<a moz-do-not-send="true"
href="mailto:k9lge@emlorenz.com">k9lge@emlorenz.com</a>><br>
Date: Tue, March 20, 2012 9:35 am<br>
To: TAPR APRS Mailing List <<a moz-do-not-send="true"
href="mailto:aprssig@tapr.org">aprssig@tapr.org</a>><br>
<br>
<div>Hi Mike,</div>
<div>No problem...when you use APRSDroid, you are connected
to what is called APRS-IS. Is it basically as you describe
...a set of APRS nodes connected over the internet. By
default, APRS-IS is separate from the RF side of APRS.
There are stations that may choose to gate -IS traffic
over to local RF (usually a limited stream- when users are
passing within a certain radius of a station, so locals
can see all traffic). Usually it is more the other way
around...where the RF side is getting gated to IS. You
will find here a great...'diversity' of opinion on the
merits of mixing RF and IS APRS traffic. Personally, under
controlled guidelines, I think it is beneficial to do so.
But I am only one opinion here. :-). So that is why you
don't by default see your traffic come up on local
RF...you only will if there is someone reverse-gating your
traffic to RF.</div>
<div>Eric K9LGE</div>
<div class="gmail_quote">On Mar 20, 2012 8:24 AM, "Mike
Goldweber" <<a moz-do-not-send="true" target="_blank"
href="mailto:mike@mikegoldweber.name">mike@mikegoldweber.name</a>>
wrote:<br type="attribution">
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div><span style="font-size:10pt;font-family:Verdana">
<div>Hi Everyone,</div>
<div><br>
</div>
<div>On Saturday volunteered at a 5K race to help
with the communications support. While I was
sitting in my car waiting for the race to begin, I
thought it might be fun to turn on the APRSDroid
app to see if any of the other volunteers would
appear on my display. Several did, which was
exciting (bear with me, I'm new to all aspects of
digital radio). So, I decided to go a step
further and I attempted to send a message through
the application. Apparently the message did and
did not get through.</div>
<div><br>
</div>
<div>The next day I ran into the guy who organized
and ran the communications. He told me that he
got the message when he linked his system to the
internet, but during the race he comm's trailer
was not linked to the internet, which is why he
did not receive my message immediately.</div>
<div><br>
</div>
<div>So I'm a little confused. I can imagine a pure
internet set of links (and displayed nodes), and I
can imagine a set of pure radio linked nodes. I
am a little confused about what seems to be a
partial mix of internet or radio nodes. Could
someone please explain the mechanics of this to
me?</div>
<div><br>
</div>
<div>Thanks,</div>
<div>Mike Goldweber</div>
<div>KB3IXO<br>
</div>
</span></div>
<br>
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<br>
</blockquote>
</div>
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</blockquote>
</span>
<br>
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</blockquote>
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