Vocal tecnology: A normalization approach

From the 1990s onwards the use of digital technology for voice and image transmission (GSM mobile telephones, satellite transmissions and Frame Relay and ATM networks) has brought about the convergence of information technology and telecommunications, leading to the birth of the ICT (Information & Communication Technologies) sector. Currently, internal telephone networks, LANs, internet connections and geographical data transmission networks are being unified in most organizations of a certain size