One of our clients is a large corporation with many remote manufacturing facilities. Because of this they have a unique emergency communications system. This client adopted a hub and spoke model for emergency communications. They have a centrally located command center connecting the facilities. If there is an emergency, the procedure is to call the command center. The command center personnel assess the level of emergency and take the appropriate action needed. It may be a call to 911 and/or issue their own alerts that are sent out to the entire building network. The system runs on a supervised redundant network so that all the facilities are connected with emergency overhead.