Traditional Phone Line GSM cellular serviceNetwork Based Security combined services  

Cell Tower Communication
GSM Cellular Service

GSM (Global System for Mobile) is the standard for cellular networks throughout the world. When using a GSM based security system, your system communicates to our Central Monitoring Station via the cellular towers. A cellular number is purchased and activated specifically for your security system. This form of communication is commonly used either as a back up to a traditional POTS analog line or as a primary communicator.