Telecommunications devices, apparatus, equipment and installations, namely, switches, PABXs, routers,servers, interactive vocal servers, computers and their peripherals, computer data terminals, computer telecommunications terminals, electronic extension cards for data terminals, telephones, telecopiers, answering machines; adapters, interface cards, modems and electronic boxes for accessing computer networks, data transmission networks, local area networks metropolitan area networks and telecommunications network hubs; telephone call waiting circuitry and displays, telephone and telecommunication network malfunction alarms, and network monitor alarms, telecommunications and computer connection cables; software, namely, interface software for accessing computer networks, data transmission networks, local area networks, metropolitan area networks and/or telecommunications network hubs, software for quality control and detection of defaults and incidents in computer networks, data transmission networks, local area networks, metropolitan area networks and/or telecommunications network hubs, software for electronic mail, software for voice messaging, software for processing electronic commerce and electronic payment, software for accounting and billing communications costs, software for analyzing flow, time and costs of communications, software for managing telephone directories, and software for confidentiality of communications by identification of the users, by access control, and by cypting