Public Telephone Networks are systems that allow people to make and receive phone calls using a network of interconnected lines and switches. These networks can be either traditional landline systems or mobile networks, enabling communication over long distances. They rely on various technologies, including copper wires, fiber optics, and cell towers, to transmit voice signals. These networks are typically managed by telecommunication companies, which provide services to individuals and businesses. Public Telephone Networks are essential for everyday communication, allowing users to connect with others locally and globally. They also support additional services like text messaging and internet access.