ITU-T P.56

ITU-T P.56 is a standardized method for measuring and assessing the quality of voice communication over telephone networks, especially in digital and voice over IP systems. It provides a consistent way to evaluate factors that affect call clarity, such as background noise, echo, and audio distortions. By using P.56, engineers can quantify how well voice signals are transmitted and identify areas for improvement, ensuring better call quality for users. It helps maintain reliable communication standards across different telecommunication systems worldwide.