<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"></head><body>One interesting point here is that RF stations wouldn't have to ack messages from this mixed-case service; the mixed-case service will have to ack messages from the RF ground station. So that's not an issue.<div><br></div><div>The issue here is whether any given ground client can send to a mixed-case addressee.</div><div><br></div><div>Andrew, KA2DDO </div><div>author of YAAC </div><br><br>-------- Original message --------<br>From: "Lynn W. Deffenbaugh (Mr) via aprssig" <aprssig@tapr.org> <br>Date: 04/25/2016 9:56 PM (GMT-05:00) <br>To: TAPR APRS Mailing List <aprssig@tapr.org> <br>Subject: Re: [aprssig] APRS Message Callsign SPEC- Ambiguity <br><br>
<div class="moz-cite-prefix">Yaesu APRS radios will not ack a
message if it comes from an -SSID that is not -0 (suppressed)
through -15 even though the APRS protocol for messages is always
in the payload portion for 3rd party packets gated from the
APRS-IS to RF with the ack coming back.<br>
<br>
APRSISCE/32 upcases APRS message targets. At least I think it
does but I didn't check the source code just now.<br>
<br>
Lynn (D) - KJ4ERJ - Author of APRSISCE for Windows Mobile and
Win32<br>
<br>
On 4/25/2016 5:07 PM, Robert Bruninga via aprssig wrote:<br>
</div>
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<p class="MsoNormal">There is an unintended ambiguity in the
APRS SPEC regarding the addressee in the APRS MESSAGE format.</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">It was intended that the TOCALL of any
transmitted message could be sent to ANY 9 character callsign
field and this included mixed-case. Although TNC’s have
historically forced callsigns to UPEPRCASE only, this is only
a limitation of TNC’s and was not intended to be a limitation
of APRS.</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">STATION names, OBJECT names, ITEM names
were intended to be a general 9 character mixed case field in
APRS padded to 9 with spaces.</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">We just noticed that some radios do not
allow sending an APRS message to a mixed case address.</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Unfortunately, the QIKCOM-2 satellite which
does DTMF-to-Voice and APRS-to-voice has a special message
address of “QIKCOMsay” for all messages it is expected to
speak. So some people will not be able to exercise this
text-to-voice messaging capability.</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">I wont make this mistake in any future
satellite, but we are stuck with it. </p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">SO, we might ought-to-identify all APRS
radios and APRS clients that have this uppercase-only
restriction on MESSAGE Callsigns.</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">I can say the Kenwoods have it. Others?</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">See <a moz-do-not-send="true" href="http://aprs.org/aprs11.html">http://aprs.org/aprs11.html</a>
and specifically, see:</p>
<p class="MsoNormal">See <a moz-do-not-send="true" href="http://aprs.org/aprs11/aprs-names-and-spaces.txt">http://aprs.org/aprs11/aprs-names-and-spaces.txt</a></p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Bob, WB4APR</p>
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