[aprssig] Digipeater Symbol Overlays

Lynn W. Deffenbaugh (Mr) ldeffenb at homeside.to
Tue Oct 18 10:08:49 CDT 2016


I'm not a big fan of the concept, but since we're in the area and people 
are using them, how about viscous digipeaters?

V# - Viscous digpeater 
(https://github.com/PhirePhly/aprx/blob/master/ViscousDigipeater.README)

I looked for a good web reference of what Viscous Digipeating actually 
IS, but the best I found was the README from APRX which is, AFAIK, the 
only APRS program currently implementing the approach.  If anyone knows 
of a better reference, I think it would be good to include it in the 
symbol definitions?

Lynn (D) - KJ4ERJ - Author of APRSISCE for Windows Mobile and Win32

On 10/18/2016 9:25 AM, Robert Bruninga wrote:
>
> Excellent feedback.  I added the digipeaters to the symbols-new.txt file
>
> I agree that L and P are mostly obsolete, but we need them in the 
> table because it will take decades before some people change their symbol.
>
> I did add #W as a new one to cover the generic WIDEn-N, SSn-N with 
> path limiting as the overall digi we use today if anyone wants to 
> start using it.
>
> http://aprs.org/symbols/symbols-new.txt
>
> Would that meet your suggestions?
>
> Bob, WB4aPR
>
> *From:*aprssig [mailto:aprssig-bounces at tapr.org 
> <mailto:aprssig-bounces at tapr.org>] *On Behalf Of *Kenneth Finnegan
> *Sent:* Tuesday, October 18, 2016 2:22 AM
> *To:* TAPR APRS Mailing List
> *Subject:* [aprssig] Digipeater Symbol Overlays
>
> So like usual, based on the previous comments on the sig, I spent a 
> few hours down the rabbit hole of lining up APRS specifications, 
> articles, emails, rumors, and ruminations, and have come back with 
> what I think is a more distilled piece of understanding. (and another 
> file in my APRS_notes repo: 
> https://github.com/PhirePhly/aprs_notes/blob/master/symbol_links.txt )
>
> Being the maintainer of Aprx, I'm particularly interested in the 
> symbol overlays used for digipeaters. Unfortunately, digipeaters 
> aren't mentioned in the overlay document. Digging through all of the 
> "New n-N paradigm" documents, and reading state working groups + 
> personal third party articles on digipeater overlays, it seems like 
> the currently expected list of digipeater overlays is as follows:
>
>  /# - Generic digipeater
>
>  1# - WIDE1-1 digipeater
>
>  A# - Alternate input (i.e. 144.990MHz) digipeater
>
>  I# - I-gate equipped digipeater
>
>  L# - WIDEn-N with path length trapping
>
>  P# - PacComm
>
>  S# - SSn-N digipeater
>
>  X# - eXperimental digipeater
>
> * Why do we include PacComm P#? I assume that's left over from pre-TNC 
> ID tocall days?
>
> * The I# I-gate digi isn't mentioned anywhere on APRS.org as far as I 
> can tell, but the classic argument that we don't have Internet access 
> at radio sites is becoming less true so these I-gate digis are 
> becoming more of a thing.
>
> * I would vote for excluding the L# overlay since many modern 
> digipeaters trap long paths, so I don't think that should be the 
> defining feature of its icon.
>
> My suggestion for a suggested set of Digipeater overlays for us to 
> promote to users is as follows:
>
>  /# - Generic WIDEn-N digipeater
>
>  1# - WIDE1-1/direct-only digipeater
>
>  A# - Alternate input (i.e. 144.990MHz) digipeater
>
>  I# - I-gate equipped digipeater
>
>  S# - SSn-N local net alias digipeater
>
>  X# - eXperimental digipeater
>
> Thoughts?
>
> --
> Kenneth Finnegan, W6KWF
>
> Aprx Maintainer
> http://blog.thelifeofkenneth.com/
>
>
>
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