Phone Lines and Home Security
The majority of phone lines are in an accessible area outside your house. To increase your home security you want your phone lines either buried underground or shielded anywhere they can be accessed. This not only prevents a thief from tampering with the monitored part of your home alarm system, but also allows you to use the phone if necessary to alert the Police.
Many modern home security systems now come with a cell phone backup that even if the phone line is cut a cell phone kicks in and communicates with the alarm monitoring company so they can send help your way. This is one way of overcoming land phone lines that are easily accessible.