Critical Communication over IP (CCoIP) employs VoIP taking it a step beyond conventional IP systems by adding enhanced IP services and applications integrating security, quality and reliability capabilities. As the industry makes the transition to VoIP technology, choices are made by manufacturers as to the “standards” their system will attain. The STENTOFON system is backwards compatible and open so the needs and requirements of the customers are continuously maintained and met with the highest quality and operating performance.