[EAS] CAP Polling Interval Questions

[Harold Price]

I don't see this as a big problem - EAS polling isn't going draw much 
from a 2GB limit.  Each alert that could be put on the air, with 
attached audio, worst case, is 1MB.  The 2GB limit is enough for 2000 
alerts a month.  Without audio (and the ENDEC won't fetch the audio 
unless the filter says to put it on the air) it enough for 500,000 
alerts a month.  Not a problem.

A couple of times per month, the ENDEC will download 1 MB in areas 
that use audio, or a few k in areas that don't.  Not an abuse of server.

Connecting, sending a packet, getting a packet, and disconnecing once 
every 30 to 60 seconds?  Also not a problem, and pretty similar to 
polling an RSS feed, leaving CNN web page up in the browser, running skype.

And, as discussed elsewhere, if it does become a problem, there are solutions.

Harold

At 11:37 AM 5/11/2011, Alex Hartman wrote:
>Harold,
>
>Plenty of ISP's are "throttling" users that are high-bandwidth hogs.
>Comcast particularly. Keeping in mind that EAS/CAP would be a VERY
>small portion of this, but a mom and pop shop with a standard cable
>modem account from comcast, who downloads programming daily will hit
>this cap quite quickly, and thus comcast will "throttle" their
>connection or even disconnect it for abuse of the terms of service!
>(has happened already to business users!) It's a transfer limit (in
>KB/MB/GB) that's imposed, not a packet limit, really.
>
>Out in the boonies, co-op telcos do this all the time, the transfer
>limit can be as small as 2Gb a month! (for long-form programming,
>that's nothing!)
>
>--
>Alex Hartman
>KVSC Radio
>
>On Wed, May 11, 2011 at 9:22 AM, Harold Price
><hprice at sagealertingsystems.com> wrote:
> > Do you have any data on packet limits for cable modems?  Do they
> > limit on number of packets, or number of bytes?
> >
> > A poll could be as simple as 6 very short packets. In bytes, per day,
> > it is the equivalent of three minutes of streaming audio at 64kbps.
> >
> > There are several ways to multicast push, via satellite, datacast on
> > TV, etc.  There are costs associated with that as well, of course.
> >
> > Harold
>
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