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FUNDAMENTALS OF DATA COMMUNICATIONS
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ampliﬁers application area network asynchronous transmission automated bandwidth baseband basic bits per second called carrier wave central ofﬁce channel Chapter character coaxial cable common carriers communication circuit conﬁguration connection data communication data communication network data transmission database deﬁned device dial dial-up Dibit disk division multiplexing EBCDIC echo suppressors efﬁcient electrical electronic mail encryption end communication processor equipment error example ﬁber optic Figure ﬁle ﬁrst ﬂow frequency front end communication full duplex functions hardware hertz host computer host mainframe computer interface layer mainframe computer micro-to-mainframe microcomputer modem modulation munication network architecture node optical ﬁber OSI model packet switching parity bit polling port processing programs pulse receiving remote satellite signal software packages speciﬁc speed standard synchronous telecommunication telephone company terminal tion transmit vendors voice grade voltage wire workstations