Cellular based monitoring and alert systems monitor for power failures, dry contact closures or any number of environmental sensors. Cellular based communication is the perfect choice when an Internet connection isn't available or it's not possible to connect to a business network or for fault tolerance. These systems can still communicate even if the building's Internet service isn't available. In case of an alarm due to power failure, security alert, or a sensor out of range, the monitoring system will send email, text or a voice call to one or more key staff members, owners or property managers.