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Ready for CAP? (AKA Common Alert Protocol)

Like any good government agency, the FCC in conjunction with FEMA are working on upgrading the acronym heavy EAS system with CAP, which stands for Common Alert Protocol. CAP includes something that  FEMA has been working on something called IPAWS, which stands for Integrated Public Alert Warning System.

The FCC is still in the comment/response process (FCC Docket 04-296) which can get long and drawn out.  I would not expect to see any NPRM until late fall 2010 with any changes taking effect in early 2011 or so.

Basically, CAP looks like this:

An EAS to CAP converter monitors a CAP source (think e-mail server) and when a CAP message is received, it converters it to EAS protocol and sends it to a input source of a  EAS encoder/decoder.  The EAS encoder/decoder then passes that information through and broadcasts it.   Of course, the EAS encoder/decoder can still be programmed to pass through specific types of messages for specific area and ignore all others.

Thus far, several manufactures have designed CAP converters for use with existing EAS units:

Implementation would look something like this:

EAS CAP converter diagram

For a TFT-2008 system.  Others such as SAGE and Trilithic are integrated into the EAS encoder/decoder units.  Basically, the CAP part of the EAS system needs an ethernet port with access to an IP gateway to receive messages from the CAP server located off site.  That is the weak link in the system, as far as I am concerned.

It is not like some of our so called trading partners have been trying to tinker with the inner tubes or anything.  It is also not like that same trading partner makes most of the cheap ethernet switches and routers found in many radio stations, hardware that can be easily configured remotely.  Configured to redirect certain IP addresses to new, exciting, and exotic locations such as Iran or Pakistan.

Perhaps I am paranoid, or not.  It falls back to my time in the military when somebody said “It’s good to be a little paranoid if everyone is out to get you.”

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3 comments to Ready for CAP? (AKA Common Alert Protocol)

  • J. Aegerter

    At the NAB this year, the FCC exhibit folks were handing out made in China “IPAWS” cloth backpacks. I asked what IPAWS was and couldn’t get a straight answer! These backpacks look to be made for a child since they certainly won’t fit me. And according to the block diagram presented above, it doesn’t look particularly “fitting” from an engineering perspective either. It is definitely a weak link, and typical of the idiotic bloated big government we support from the taxes and fees coming out of our pay envelopes. The public Internet is extremely useful, but in this case as the administrator correctly states, is vulnerable from anywhere in the world. It almost appears that we are being set-up for another 9-11, but this time, “Big Time”! And what about the stations serving areas of the country where a good reliable high-speed Internet connection may not be available?

  • […] More of a CAP description here. […]

  • […] on September 30th, there has be a flurry of activity regarding the manufacture and installation of CAP equipment.  CAP is integrated into something called IPAWS, which stands for Integrated Public Alert and […]

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