TesiraFORTE AVB VT4 AVB Fixed I/O DSP 4AEC-in / 8out / 2-VoIPThe TesiraFORT AVB VT4 is a digital audio server with 4 analogue inputs and 4 analogue 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, and a standard FXO telephone interface. TesiraFORT AVB VT4 utilises AVB TSN digital audio networking, and can be used as a standalone device or combined with other TesiraFORT AVB devices and Tesira