I think nowadays it makes a lot more sense to use a pure cellular connection. When I had my system installed, I initially got a phone line installed just for i

I think nowadays it makes a lot more sense to use a pure cellular connection. When I had my system installed, I initially got a phone line installed just for it, but then the monitoring company pointed out that the monthly cost of my POTS line was more than the monthly cost of the data-only GSM connection. I'm not particularly worried about macgyver burglars snipping my alarm wires, but now in order to disrupt it, they'd either have to jam the GSM signal or locate the controller box (which is locked up) and rip the antenna off. Re: your comment about your insurance company not recognizing a homebrew security system, all I've got to say about that is that I don't care how good a coder you are, being the sole QA person for your house's security system is probably a pretty miserable experience. :)