There are several factors that can cause issues with dead air or unknown calls. SchoolMessenger’s success is dependent on the telephone provider’s service. Many times during storms there are power outages or issues with various switches or carriers like Verizon, Frontier, Time Warner, etc. that cause intermittent issues in our areas. Many of these providers main offices that supply service to our area are not located here in New York but are in other states and their weather can have an impact on our service area as well. It’s also possible in rural areas that telephone call are not getting routed properly. Attached is information from SchoolMessenger that outlines the call routing issues the FCC has discovered and what they are doing to combat the problem.