Telefonie refers to the technology and practice of transmitting voice communications over distances. It primarily involves the use of telephones, which convert sound waves into electrical signals that can be sent through various mediums, such as copper wires or fiber optics. This allows people to communicate in real-time, regardless of their physical location. The evolution of Telefonie has led to various forms, including landline phones, mobile phones, and Voice over Internet Protocol (VoIP) services. Each of these technologies has improved accessibility and convenience, enabling users to connect with others easily and efficiently across the globe.