The HD Visual Communications System is packed with Panasonic technology for connection stability. A rate control function accurately estimates network congestion, and controls the data transfer amount to reduce packet loss. In addition, the combined usage of Forward Error Correction (FEC) and Automatic Repeat reQuest (ARQ) helps to restore inevitable packet loss. These functions make it possible to achieve a stable connection and prevent image disruptions and sound interruptions, both on intranets and on the Internet, where bandwidth is not guaranteed and the usable bandwidth constantly changes due to traffic conditions. The range of business opportunities naturally expands because of the ability to conduct visual communication with clients and customers outside the company.