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Data communication concepts and alternatives
Modems and multiplexers
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access control analog applications area networks bandwidth baseband binary Bisync bit/s block broadband carrier CCITT channel character circuit switched connected connector CSMA/CD data communications data link data link layer data networks data rates data terminal equipment data transmission data word database DDCMP defines delay detected devices distributed division multiplexing encryption error rate Ethernet facilities fibre optic format frame frequency full-duplex functions groundstations HDLC header IEEE input interconnection ISDN kbit/s LAP-B link control logical logical link control mainframe Mbit/s mode modem modulation multipoint node octets output packet switched phase physical layer polled processing processor protocol received remote terminals retransmission ring routing satellite sequence number server shown in Figure signal slot station Statistical multiplexers synchronisation synchronous teletex token passing topology typical voltage wide area networks