Generally, monitored home security system is an alarm system that will react to the alarm being activated by sending a signal to an emergency service which will deal with the situation rapidly and swiftly. By providing monitored home security system you can be sure that you will get help immediately if something unforeseen happens to your property. However, there are two possible ways of being connected to the monitoring center, either by a standard landline or by cell phone. The big advantage of monitoring via cell phone is that the burglar cannot sabotage your phone line outside like he can do with a landline. Most people place their cell phone transmitter unit in the roof of their house in order to have a good signal. It means that you will always be able to connect when there is most need for that.