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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Argent data will program a KISS rom for
$5, they will also program a UIDIGI rom for free to encourage digipeaters. Using
a 27C256 rom.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>At a guess they would probably
program other digipeater firmware for free.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>You need to supply the code you want programmed
however.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><a
href="https://www.argentdata.com/catalog/product_info.php?products_id=24">https://www.argentdata.com/catalog/product_info.php?products_id=24</a><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>I have both roms for a tnc2 clone from
them<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<div>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial'>Steve Daniels</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial'>G6UIM</span></font><o:p></o:p></p>
<p class=MsoNormal><st1:place w:st="on"><font size=2 color=black face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Torbay</span></font></st1:place><font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'> Freecycle
Moderator</span></font><o:p></o:p></p>
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<p class=MsoNormal><b><font size=2 color=black face=Tahoma><span lang=EN-US
style='font-size:10.0pt;font-family:Tahoma;color:windowtext;font-weight:bold'>From:</span></font></b><font
size=2 color=black face=Tahoma><span lang=EN-US style='font-size:10.0pt;
font-family:Tahoma;color:windowtext'> aprssig-bounces@tapr.org
[mailto:aprssig-bounces@tapr.org] <b><span style='font-weight:bold'>On Behalf
Of </span></b>Stephen H. Smith<br>
<b><span style='font-weight:bold'>Sent:</span></b> 14 November 2011 17:18<br>
<b><span style='font-weight:bold'>To:</span></b> TAPR APRS Mailing List<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [aprssig] A TNC2
(clone) question</span></font><font color=black><span lang=EN-US
style='color:windowtext'><o:p></o:p></span></font></p>
</div>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'>On 11/14/2011 9:24 AM, <a href="mailto:kc8sfq@mei.net">kc8sfq@mei.net</a>
wrote: <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'><br>
Hi All:<br>
I have an old MFJ1274 TNC. I'm thinking of putting it, along with a radio and a
gel cell battery, in a waterproof box for use as a temp DIGI for SAR and
similar such field use.<br>
<br>
What I know about the MFJ:<br>
1: It won't work with APRSISCE/32 (my fav) since it won't stay in KISS mode.<br>
2: It'll require a new EPROM for extended KISS operation. That's about $40-50
by the time it's all up and running. There are better and easier ways to do
that for the same money.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'><br>
Replace the eprom with the last-ever TAPR Release 1.1.9 firmware which has a
perfectly serviceable KISS implementation in it. <br>
<br>
<br>
<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'><br>
My questions:<br>
1: Will the MFJ1274 support the new n-N paradigm? or will it need to be
addressed by it's specific callsign-SSID? (I know it's been upgraded to at least
1.2.9 firmware)<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'><br>
Not as-is, with the exception that if all you want it to do is be a home-style
first-hop fill-in digi, then set it's callsign "alias" to
"WIDE1-1" . (The first-hop WIDE1-1 digipeating doesn't depend on the
TNC having the APRS-centric callsign-changing/substituting capability
described below.)<br>
<br>
<br>
<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'><br>
2: will the MFJ even function as an APRS DIGI? (my understanding is that
there's nothing special about an APRS packet as far as a DIGI is concerned)<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-bottom:12.0pt'><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt'><br>
But there ARE major differences between classic connected packets and APRS
packets ! <br>
<br>
>From the standpoint of the AX.25 protocol used by both "classic"
packet and APRS, the path settings are the callsign(s) of the station(s)
being asked to relay the packet. In classic packet, these would be the
actual calls of the stations involved; i.e. you had to know in advance the
calls of the stations involved to get a packet relayed. In APRS, all
stations respond to the same generic "callsigns" of WIDE1-1,
and/or WIDE2-n. <br>
<br>
Current "New Paradigm" APRS depends on digipeaters being able to
actually CHANGE these "callsigns" as packets pass through them --
something classic packet NEVER did. APRS digis modify these
"calls" as they pass the packet on, to track and control the number
of relay hops. For example, WIDE2-2 becomes WIDE2-1 which becomes
WIDE2-0 as a packet passes through 3 successive digis. This
handling of callsigns is unique to APRS. <br>
<br>
Many of the new-breed low-cost KISS-only APRS-only TNCs such as TinyTrack 4,
Tracker2, TNC-X, AGW uTNC, etc CAN do APRS-style digipeating
stand-alone. The ONLY "classic" TNCs able to do this
off-the-shelf stand-alone (i.e. unassisted by computer programs), were the
Kantronics KPC3 family TNCs. PK-232s, TNC2s, etc require a computer
program running through a KISS interface to do modern APRS digipeating. <br>
<br>
You can endow almost any TNC-2 clone, such as your MFJ with this ability by
replacing it's OEM firmare with the freeware UI-Digi firmware that converts the
TNC2 to a dedicated APRS digipeater. However it becomes STRICTLY a
stand-alone digipeater, and can no longer be used for local transmit/receive by
a an attached PC. <br>
<br>
<br>
See the full history and underlying logic of APRS digipeating here on my
website:<br>
<br>
"APRS 101" Explanation of APRS Path Selection & Digipeating
<br>
<a href="http://wa8lmf.net/DigiPaths">http://wa8lmf.net/DigiPaths</a> <o:p></o:p></span></font></p>
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<p class=MsoNormal style='margin-bottom:12.0pt'><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt'><br>
--<br>
<br>
Stephen H. Smith wa8lmf (at) aol.com <br>
=== Now relocated from <st1:City w:st="on">Pasadena</st1:City>, <st1:State
w:st="on">CA</st1:State> back to 8-land (<st1:place w:st="on"><st1:City w:st="on">East
Lansing</st1:City>, <st1:State w:st="on">MI</st1:State></st1:place>) ===<br>
Skype: WA8LMF<br>
Home Page: <a
href="http://wa8lmf.net">http://wa8lmf.net</a><br>
<br>
===== <st1:place w:st="on">Vista</st1:place> & Win7 Install Issues
for UI-View and Precision Mapping =====<br>
<a href="http://wa8lmf.net/aprs/UIview_Notes.htm#VistaWin7">http://wa8lmf.net/aprs/UIview_Notes.htm#VistaWin7</a><br>
<br>
*** HF APRS over PSK63 ***<br>
<a href="http://wa8lmf.net/APRS_PSK63/index.htm">http://wa8lmf.net/APRS_PSK63/index.htm</a><br>
<br>
<br>
<br>
<br>
<o:p></o:p></span></font></p>
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