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[aprssig] APRS Local Info Initative TM-D710A compatibitility

Lynn W. Deffenbaugh (Mr) ldeffenb at homeside.to
Thu Apr 26 20:43:24 UTC 2012


On 4/26/2012 4:10 PM, Ron Stordahl, AE5E wrote:
> As such it does have to be sent frequently, perhaps every 10 minutes, 
> but the path should be such that it does not end up on the APRS-IS 
> network nor digipeated far far away.  You can keep it off of APRS-IS 
> by terminating the path with the string ',NOGATE'.  IGates which are 
> working correctly will not send such a packet to the internet.  The 
> path itself should be short, perhaps only NOGATE so that no area 
> digipeater will repeat it.

Why keep such objects off the APRS-IS?  If I'm planning a trip into an 
area, I'd like to be able to scope it out in advance and see what the 
radio infrastructure might be there via aprs.fi (or your favorite APRS 
Internet site).

Alternatively, if I'm using a contemporary APRS-IS client to see the 
surrounding infrastructure and have a voice-only radio, why hide the 
repeater objects from my visibilty?

You're actually adding path length for NOGATE and could shorten the 
packet by 7 over-the-air bytes if you just let the APRS/APRS-IS work as 
designed instead of trying to keep packets "private" for some reason.

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

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