A telephone exchange is a system that connects telephone calls by routing them through a network. It serves as a central hub where incoming and outgoing calls are managed, allowing users to communicate with each other. The exchange can be either manual, where operators connect calls, or automatic, using electronic switches to facilitate connections without human intervention. Modern telephone exchanges are part of larger telecommunications networks, often involving digital technology. They handle various services, including voice calls, data transmission, and internet connectivity. The efficiency of a telephone exchange is crucial for maintaining clear and reliable communication between users across different locations.