Provides a complete presentation control and signal routing solution with built-in audio conferencing for boardrooms and classrooms. Integrating the control system, multimedia matrix switcher, mic mixer, audio DSP, amplifier, and DigitalMedia distribution center all into a single 3-space rackmount package, the DMPS3-300-C-AEC affords substantial signal routing flexibility and high-performance signal processing without the need for separate components. Its built-in audio conferencing interface and full-bandwidth acoustic echo cancellation allow for high-quality, full-duplex voice conferencing via a SIP or POTS phone line, and seamless integration with up to two external video conferencing codecs.