[aprssig] TEMPn-N and callsign digipeating

[Robert Bruninga]

>If all of the TEMPn-N digi's are on 144.99, then when you 
>transmit back out on 144.39, there will not be any digi's 
>around to hear it, right?

I can clairfy things a little bit.  Remember, TEMPn-N can
be used anywhere a D700 is, usually this is on 144.39
where the D700's already are.  But if the channel is so
busy, that you need better reliability for messaging in
your special area, then ask the D700's supporting
your emergency to move to 144.99 if availble in your
area.  Then you get broader, multi-hop coverage
for your special event or emergency using the TEMPn-N
on its own low collision frequency, and all this without
having to reconfigure the D700's supporting the network.

Now, this NEW idea is to extend TEMPn-N support 
to 144.99 (if available in your area) permanently
at some really good digi sites.  This then provides
some additional ready-to-go TEMPn-N very high
site support on a dedicated APRS emergency channel.
Only a few are needed.  Then D700's can augment
this for events and emergencys.  But again, I wouild
assume that special emergency traffic on 144.99
wouild stay there in that limited area so that it does 
not have to suffer the collisions with 144.39 
unattended stations.  But since the alt-input digis
are also on 144.99, then any traffic that needs
to go from the TEMPn-N nework over to the 39
network, can put a W1-1 as the gateway call.

Bob, Wb4APR

On Sun, May 28, 2006 6:05 pm, Robert Bruninga said:
>>>> wa7nwp at jnos.org 05/28/06 12:54 PM >>>
>>... getting some TEMPn-N activity here for Field Day.
>>...   Does a TEMPn-N D700 mobile digi automatically
>>digipeat on the stations callsign or will it be necessary
>>to add it to the UIDIGI settings?
>
> Im not sure I follow, but TEMPn-N packets should work
> just exactly like WIDEn-N packets, but of course will
> only go through other TEMPn-N digis.  But since all
> Field Day operations is on 145.01, instead of 144.39,
> then other digi calls are not involved.
>
> Now this does bring up anotehr good idea for EMERGENCY
> preparedness.  That is, local GURU's could decide what
> local battery backed up-reliable digis BEST serve their
> area in times of disaster, and maybe add TEMPn-N
> support to those SPECIAL digis.  THis way, when the
> disaster hits, and we might need to depend on TEMPn-N
> paths, a few widely dispersed TEMPn-N digis could
> really provide some support.
>
> BUT to get them away from any APRS QRM, maybe these
> TEMPn-N digis sshould also be on another frequency.
> AND since there is no way to add TEMPn-N to existing
> digs (all only support one kind of traceable n-N at a time).
> Maybe we are talking here about adding TEMPn-N
> to the INFRASTRUCTURE already on a local underused
> digital channel.  Then emergency APRS traffic can travel
> WELL on this alternate channel without the QRM from
> 144.39.
>
> MAYBE the best place for this network is the APRS alt-input
> channel of 144.99!   Remember, that being +600 from
> 144.39 lets this be an ideal place for low power trackers
> to get into the network.  But it couild also be the backup
> TEMPn-N network too!  SInce TEMPn-N would not normally
> be used except in emergent situations...
>
> OK, how's this...
> APRS ALT-INPUT digis listen on 144.99 and digipeat to
> 144.39 for low power trackers and special opeations.
> These ALT-INPUT digis use the UIDIGI ALIAS of
> WIDE1-1 so that mobiles and HT's using W1-1,W2-1
> will get digipeated over to the 144.39 frequency.
>
> BUT this same digi has TEMPn-N in its UITRACE parameter
> so that it also acts as a TEMPn-N (as a final hop over to
> 144.39)....  This way, these HIGH-SITE digipeaters that
> are listening for low power trackers, can also be our
> back-up network for listening to TEMPn-N digis (700
> mobiles) when needed!   Wow, is this a good idea, or am
> I missing something?
>
> Bob, Wb4APR
>
>
> I'm thinking we may have to always add the local call
> as one of the four UIDIGI aliases.
>
> 73,
> Bill
>
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-- 
William McKeehan
KI4HDU
Internet: mckeehan at mckeehan.homeip.net
http://mckeehan.homeip.net

Leave the beaten track occasionally and dive into the woods.
Every time you do so you will be certain to find something that you have never
seen before.
     - Alexander Graham Bell

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