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The history of telecommunications; voice characteristics; the telephone network; the telephone set; analog versus digital transmission; carriers; lines versus trunks; traffic engineering; equipment - private branch exchanges; key telephone systems; voice processing; computer to telephony integration (CTI); data communications; Ti and T-carrier systems; the open systems interconnect model (OSI); Internet; Intranet; packet switching technologies (X.25); local area networks (LANs); Ethernet; token ring LANs; baseband versus broadband; fibre-distributed data interface; switched multimegabit data services; frame relay; integrated services digital network; asynchronous transfer mode; cellular and personal communications systems; radio systems; light systems; video conferencing; finances for telecommunications; facsimile; cabling systems.