A communication method involving simultaneous transmission and reception of audio signals, allows participants to speak and hear each other in real-time. An example of this is a typical conversation between two individuals using telephones, where each person can talk and listen without interruption.
This method provides immediate feedback and clarification, making it crucial for collaboration, customer service, and emergency communication. Historically, its development significantly improved communication efficiency compared to earlier, less interactive systems, fostering faster decision-making and problem-solving.