Biamp Tesira FORTÉ DAN VT420Hz to 20kHz, 100 240VAC 50 60Hz, 35 W, 108 dB The TesiraFORT DAN VT4 is a digital audio server with 4 analog inputs and 4 analog outputs, and includes Acoustic Echo Cancellation (AEC) technology on all 4 inputs. It includes up to 8 channels of configurable USB audio, a 2 channel VoIP interface, a standard FXO telephone interface, and Dante digital audio networking. The TesiraFORT DAN VT4 complies with the United States Trade Agreement Act (TAA),