Cellular systems use cell towers to communicate with the monitoring center as well as a battery backup that can keep them up and running for several hours until the electric service is restored. Landline systems use traditional phone lines to communicate with the monitoring center and, just like cellular systems, they usually have a battery backup to keep them working for a set period of time. However, Voice over Internet Protocol VoIP systems rely on Internet connection, and if the power outage is widespread and causes the Internet service to shut down, then the system won’t work. Best home security systems1. Ring Alarm2. Canary All in One3. Nest Secure4. Abode5. SimpliSafe6. Honeywell HomeRead on for our detailed analysis of each systemThe one crime statistic that is falling across the US year on year is burglary, and that's because homeowners are turning to home based security systems that can help prevent crime. It's not just about trying to deter opportunists, but also making sure that even determined burglars will have difficulty forcing their way into your home without being caught.