Good points, especially regarding EMI-EMC. The ADT system is supposedly
"wireless" (presumeably this is for the door sensors), but they don't
really indicate what frequency is used. UHF or S-band stuff is probably
pretty bulletproof. I think putting my own equipment in might be a
better choice than getting stuck with whatever luck of the drawn stuff
they are providing.

FWIW, ADT says they are selling fixed term (2 or 3 year) contracts only.

Thanks,

Mike W4EF...........

W2RU - Bud Hippisley wrote:

>
>
>
> On May 7, 2009, at 3:37 AM, Michael Tope wrote:
> > I've never had occasion to use a monitored alarm system, so I am
> > curious
> > if anyone on the list has dealt with this as a solution to remote site
> > security concerns. I called ADT security Tuesday....
>
> Well, I've never had a *remote* site on a security system but I *have*
> had my previous QTH on an ADT system and I give you two big warnings:
>
> 1. The normal ADT installation will put unshielded wires emitting
> gawd-awful RFI from their microprocessors all through your structure.
> I used to have to go through a specific notification sequence with
> their control center in order to disarm the system and disconnect
> power to their control box in my basement each time I wanted to do any
> early-morning weak-signal operating on 160 or 80 meters.
>
> 2. When it came time to move, and I had sold my home, ADT refused for
> months to terminate my account. They had a very complicated procedure
> they insisted departing subscribers follow for "notification" but, in
> fact, they always found a reason to keep adding the monthly charge to
> my bill. My request for termination of service was bounced from their
> regional office to their Pittsburgh HQ, where they could deal with me
> from a distance. Their objective, of course, was to get me to
> continue the service at my current location. The only thing that
> ultimately stopped this corporate stone-walling was a letter from my
> attorney, threatening legal action.
>
> If you want some security, get some DIY components and install your
> own system so you can do it right. If you insist on going with an ADT-
> like system, plan on buying *lots* of ferrite cores....
>
> Bud, W2RU
>
>
>
>




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