On 02-Mar-12 16:08, MCH wrote:
> I would recommend a combination of internet, POTS, CDPD (Cellular), and
> commercial radio frequencies (they actually have frequencies for
> alarms). The likelihood of all being taken down at the same time drops
> the more avenues you have. If you're close enough you could even use WIFI=
..
>
> Joe M.
>


     He can even use a low speed AFSK signal on a GSM module.

     Mark

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