[aprssig] Misc. Ramblings
scott at opentrac.org
Tue Aug 7 00:19:22 CDT 2007
> At work we've been using Verizon EVDO as an end-to-end link for law
> enforcement purposes (live video) FOR OVER A YEAR and for about the last
> six weeks we've been seeing more and more EVDO to EVDO connections no
> longer working. Verizon denies any problem and says they are doing no
Yeah, watch out. We were using Verizon EVDO for monitoring municipal
water quality telemetry, and when we added remote security cameras we
went over Verizon's secret traffic threshold on the "unlimited" data plan.
We couldn't get anyone on the phone with the authority to prevent the
site from being shut down in the 3 days notice we got, so it was shut
off and required a visit to the site (some 4 hours away) to retrieve the
card so it could be re-activated in its billing area code, and another
trip to re-install it.
The form letter was great - it explained to us that there was absolutely
no way we could legitimately be using that much bandwidth, and that we
were therefore illegally sharing videos and music. This despite the
fact that the link was an encrypted VPN and only connected to exactly
one remote host.
> I'm also doing a GPS provisioning project at work, and ordered a few USB
> GPS units for evaluation. I got a couple GlobalSat BU-353 GPS pucks
> that have a SiRF Star III receiver, and all I can say is, "Holy Cow!"
> These have to be the most sensitive GPS receivers I've ever seen. They
> lock onto several satellites at my test bench at work, which is uncommon
> for any consumer GPS receiver. And they were only about 50 bucks each,
> to boot.
I've got some new SiRF Star III receivers from Deluo - I forget who
makes this model, but they work great. Unfortunately, the entire batch
came with the wrong connector and they won't work with any of the Deluo
adapters. If they can't replace them in a reasonable amount of time,
I'll see if I can get a discount on the bad batch. If that happens,
I'll have a sale on serial SiRF Star III receivers and you can all stock
up and solder your own DB9s. =]
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