The Federal Signal AudioRouterTM is an audio multiplexing system capable of directing selected audio inputs to specific zones. The AudioRouter can be used in a public address system as a central control for routing voice pages, pre-recorded messages, and other audio sources to specified zones or areas within a facility. The center of the AudioRouter system is the Model AR2000-M. The AR2000-M accepts the following source inputs: 25 Vrms, 70 Vrms, 1 Volt peak-to-peak, a telephone line, and a local microphone.