Quote:
Originally Posted by Porsche-O-Phile
Lots of off-the-shelf alarms have a GSM add-on that you can use just in case someone cuts a phone line. That way your call still goes out (either to a monitoring company or a pre-selected other number, depending on the system). I have it on mine.
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Most people don't want to spend the extra $35/mo. for that feature and the alarm companies don't push it.