I once designed a system using Motorola radios to protect a remote site without phone or power.
Being in this business for decades, it drives me nuts. All this talk about back up communication. What they never talk about is the the Police could hardly care less about burglaries.
And all these camera Aps to watch your place. How often are you going to watch your living room remotely? GREAT technology, but has nothing to do with security.
A LOT of HIGH power LOUD sirens are your first line of defence. But cost me time and money to install and compete with my monitoring revenue. The ONLY thing that really matters in this industry!
The Internet is going to turn the security system on it's ear. Many jurisdictions require police registration for monitored security system. Just an extra TAX for a job the Police aren't doing! So, the old lady across the road can call the Police if your place is being Robbed without being registered but not the monitoring company. So, what happens if you have a cell phone Ap that alerts you when your alarm has gone off, and YOU call the cops?
Probably the only reason Monitoring Stations still exist is that you get a 10% discount on your insurance if you have monitoring. The same 10% you get if you say you have fire extinguishes, or (before they were manditory) smoke detectors.