A mass notification system is disclosed. The system can include a communication network. The system can also include a number of network devices communicably coupled to the communication network, where at least two of the network devices are configured to generate a communication substantially simultaneously. The system can further include a server communicably coupled to the communication network and configured to control the plurality of network devices, where the server instructs the at least two of the plurality of network devices to generate the communication. The system can also include a first client communicably coupled to the communication network and comprising a user interface, where the first client is configured to communicate, via the user interface, with the server and the plurality of network devices.