[EAS] Time to make the LP daisy chain an option
Sean Donelan
sean at donelan.com
Tue Sep 3 11:22:56 CDT 2019
On Tue, 3 Sep 2019, Clay Freinwald wrote:
> Clay - In my experience, the reason we still have a Daisy Chain is because
> The FCC was reluctant to try and come up with something better during
> The transition from EBS. I know of no-rule that states that a Daisy Chain
> Distribution system must be used. I do know that Frank approved the
> Washington State Plan back in the last century that did not make use of it.
The FCC doesn't do engineering. It left that job up to each individual
state emergency communication committees. My estimate, about two-thirds
of the states essentially took their EBS plans -- search & replaced EBS
with EAS adding the minimum changes, such LP-2's and intepreting EAS
event codes. It was a lot of work, but ended up with the same basic
framework.
A handful of states were more innovative, e.g. using satellite,
state networks, etc; which depended a lot on the availability of state
resources & money. I can see the results in the state plans, but don't
know the stories behind their work.
The biggest changes to state plans started happening around the time of
the Common Alerting Protocol and IPAWS. A few states set up state-level
CAP servers, and took the opportunity to redo their state plans.
Picking a few states which have tried something different, not saying its
good or bad, just different:
Alabama
Alaska
Hawaii
Maine
New York State
Nebraska
Texas
Washington State
None have completely eliminated LP stations. Well, a couple say they did,
but still have equivalents in their plans. But they've minimized
daisy-chains and have tried some interesting alternatives to reach every
EAS participant (broadcasters, cable, etc) in the state.
A few states have followed Washington State and shifted all origination
and regular testing duties to government agencies.
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