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--></style></head><body lang="EN-US" link="blue" vlink="purple" style="word-wrap:break-word"><div class="WordSection1"><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">The original texting APRS radio, the D7 can only display 45 bytes of Messages. The D700 displays 64.</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">The VX8R etc I think displays 80 maybe.</span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Just remember, limiting to 45 charageceters will ALWAYS work and be seen by everyone. Anything longer is risking miss-commmunication. </span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">But yes, they can be longer if you KNOW who you are sending to. That is why the APxxxx identifies the type of radio in all packets, so we can see what their capabilities are.</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Bob, WB4APR</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p>
<div><div style="border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0in 0in 0in"><p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> <a href="mailto:aprssig-bounces@tapr.org">aprssig-bounces@tapr.org</a> [mailto:<a href="mailto:aprssig-bounces@tapr.org">aprssig-bounces@tapr.org</a>] <b>On Behalf Of </b>Bryan Hoyer<br>
<b>Sent:</b> Saturday, November 10, 2012 11:22 AM<br><b>To:</b> TAPR APRS Mailing List<br><b>Subject:</b> [aprssig] What sets the max packet length for APRS</span></p></div></div><p class="MsoNormal"> </p><p class="MsoNormal">
APRS1.01 states 67 characters for a message and up to 43 for a comment, yet I see packets twice that long on <a href="http://APRS.FI">APRS.FI</a>. This ones 109 after the :</p><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal">
<b><span style="font-size:9.0pt;font-family:"Verdana","sans-serif";background:white"><a href="http://aprs.fi/?c=raw&limit=&call=KA8OAD-1"><span style="text-decoration:none">KA8OAD-1</span></a></span></b><span style="font-size:9.0pt;font-family:"Verdana","sans-serif";background:white">>APU25N,</span><a href="http://aprs.fi/?c=raw&limit=&call=K8YSE-1"><span style="font-size:9.0pt;font-family:"Verdana","sans-serif";background:white;text-decoration:none">K8YSE-1</span></a><span style="font-size:9.0pt;font-family:"Verdana","sans-serif";background:white">,WIDE1,</span><a href="http://aprs.fi/?c=raw&limit=&call=K8UI-1"><span style="font-size:9.0pt;font-family:"Verdana","sans-serif";background:white;text-decoration:none">K8UI-1</span></a><span style="font-size:9.0pt;font-family:"Verdana","sans-serif";background:white">,WIDE2*,qAR,</span><a href="http://aprs.fi/?c=raw&limit=&call=K8LI-1"><span style="font-size:9.0pt;font-family:"Verdana","sans-serif";background:white;text-decoration:none">K8LI-1</span></a><span style="font-size:9.0pt;font-family:"Verdana","sans-serif";background:white">:@101613z4108.09N/08136.25W_190/004g005t057r000p020P020b10220h51FWX_http://<a href="http://pages.sssnet.com/kend">pages.sssnet.com/kend</a> Fairlawn,OH</span></p>
<div><p class="MsoNormal"> </p></div><div><p class="MsoNormal">AX.25 says 256 bytes for the UI payload</p></div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal">A Tweet is 140 characters</p></div><div><p class="MsoNormal">
</p></div><div><p class="MsoNormal">An SMS is 160 characters</p></div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal">Is it just the display limit of some radios?</p></div><div><p class="MsoNormal"> </p></div>
<div><p class="MsoNormal">Just exploring the capabilities and limitations of APRS</p></div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal">Thanks!</p></div><div><p class="MsoNormal">Bryan Hoyer - K7UDR</p></div>
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