No subject

Tue Jul 28 09:57:54 CDT 2009

dependent upon internet connectivity.&nbsp; Most of their records, and proc=
edural 
information is via internet.&nbsp; A decent speed ad-hoc connection must be=
 in our 
emergency 'bag of tricks.'&nbsp; There have been several ideas floated at l=
ocal ARES 
discussions.&nbsp; The hangup is:&nbsp; there are so many ways to get into =
the internet, 
it is unknown which one will actually be able to connect during an emergenc=
y. 
&nbsp; 
 &gt; aprs is entirely unnumbered and unconnected, and that's what makes=
 it &gt; work well. it also seems like that would lend itself to useful=
, but &gt; slow data communications over a fairly wide area. &gt; <B=
R>
&nbsp; 
Key work here is slow.&nbsp; Again, served agencies require better than dia=
l up for 
their service needs. 
 &gt; anyone have any info on using digis to connect up to tncs far and =
 &gt; wide, or passing files on 144.390? &gt; &gt; -jerry 
Wyoming has an excellent APRS system of interconnected digis.&nbsp; They on=
ly have about 
13 digis for the whole state.&nbsp; Before a trip out that way, I looked up=
 the digis and 
igates in Wyoming.&nbsp; Seeing on a handful, I though coverage would be ba=
d or 
nonexistent.&nbsp; 
&nbsp; 
For the&nbsp;trip out there,&nbsp;thinking&nbsp;things would be very 
sparse,&nbsp; I bumped up my packet rate, and put a linear on the output of=
 the HT.&nbsp; I was 
still lulled into thinking I wasn't being detected, because I couldn't hear=
 my signal being 
digipeated. 
&nbsp; 
Upon return, I found out the Wyoming guys have their act together.&nbsp; Th=
e digis they do have are all located up pretty high, &gt;10,000 feet in man=
y cases.&nbsp; Their footprint is 
massive.&nbsp; Because of this, the don't run them as digipeaters, but as r=
emote receivers 
and local TNCs 
for a central (actually two) igate.&nbsp; This cuts down on the channel tra=
ffic, and the 
central igate does packet filtering before dropping the packets into the in=
ternet.&nbsp; They 
use 440 and 1296 as links.&nbsp; The result is tremendous coverage for almo=
st the entire state, 
with very low collision rates and sparse digis.&nbsp; So I was applying my =
normal 'flat land' 
Iowa concepts of how APRS works to Wyoming.&nbsp; I was quite wrong. <br=
 /><hr />Get back to school stuff for them and cashback for you. <a href=3D=
'http://www.bing.com/cashback?form=3DMSHYCB&publ=3DWLHMTAG&crea=3DTEXT_MSHY=
CB_BackToSchool_Cashback_BTSCashback_1x1' target=3D'_new'>Try Bing now.</a>=
</body>
</html>=

--_d0f90d74-c5a3-4438-aaf1-eed8dddd7300_--