I am also interested in implementing some sort of openVPN tunnel with
RIP listener on a OpenWRT platform. It's been ages since we had any
wormhole connectivity here in Wisconsin (Wigate/KB9BYQ days). And
back then it really wasn't implemented correctly in my opinion.
As many know, a few of us here in Green Bay, Wisconsin have been
experimenting with non-traditional alternatives to AX.25. More
recently the 420 MHz 802.11 options.
What I really am waiting for is someone to design some amplifiers for
these things. We have been using 900 MHz 802.11 with a 5 MHz channel
width for some point to multipoint links.
In our mobile tests on 900 MHz, the throughput suffers with the
multipath from being in motion, etc. So be aware of that, 56 k will
quickly be come 10k or worse.
At 5 watts on 900 MHz, we manage to pull off 5 mile non-line of site
omni-to-omni links with strong signals. A configuration conducive to
a Mesh Network. On 900 MHz noise is a problem though, which also
results in reduced throughput. So I'd like to be doing 5 watts on 420
MHz.
The RFM12BP looks like a way to pull of 19 to 24 kbps on 70cm cheap.
Amplifiers for this should be much easier.
Steve, KB9MWR
> Message: 1
> Date: Fri, 8 Jun 2012 11:00:30 -0800
> From: Eric Fort <eric.fort(a)gmail.com>
> To: AMPRNet working group <44net(a)hamradio.ucsd.edu>
> Subject: Re: [44net] (no subject)
>
> Why would I or anyone else for that matter use anything that slow over
> wireless when multi megabit radios that will link reasonably long distances
> can be had for $50-100ea. These radios connect via ethernet with no
> special software. No I don't have any 56k radios on order, I don't see
> them as worth the cost to salvage from the trash bin next door.
>
> Eric
> AF6EP
>
> Message: 3
> Date: Fri, 08 Jun 2012 12:26:04 -0700
> From: David Josephson WA6NMF <wa6nmf(a)josephson.com>
> To: eric.fort(a)gmail.com, AMPRNet working group
> <44net(a)hamradio.ucsd.edu>
> Subject: Re: [44net] (no subject)
>
> On 6/8/2012 12:00 PM, Eric Fort wrote:
>> Why would I or anyone else for that matter use anything that slow over
>> wireless when multi megabit radios that will link reasonably long
>> distances can be had for $50-100ea. These radios connect via ethernet
>> with no special software. No I don't have any 56k radios on order, I
>> don't see them as worth the cost to salvage from the trash bin next door.
>
> Two reasons: long point-to-point hops and mobile.
>
> I can see a real utility for a 56k backbone with 100+ mile hops which
> can easily be done on 420 with fewer complications (except in PAVE PAWS
> areas) than on the higher bands. Likewise, mobile service with omni
> antennas is practical over 20+ miles on 420.
>
> David WA6NMF