A flashing green light means the device was attempting to send a message, but was unable to access the network. The most common reason is signal strength. If this is a reoccurring issue, ensure the antenna is properly attached to the Alarm-Point and check the signal strength from the virtual control panel. If the signal strength is weak (below 15), consider moving the device to a better location by extending the sensor lead with an optional cable or purchase an external antenna from the Accessories page.