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Overview of Data Communications
Communications Signals and Signal Processing
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algorithm analog applications ARPANET bandwidth baseband basic buffer bytes cable called carrier CCITT channel chapter character clock coding concentrator connected constraints cost cut-set data link layer data link protocol data networks data rate datagram DDCMP delay detection devices dial dial-up encryption end-to-end equipment error example field Figure filter flow control frame frequency functions graph HDLC header indicates input interface ISDN kbps loop Manchester coding mode modem modulation multidrop multiplexing network design network layer node operation optimal OSI Reference Model packet packet switching phase point-to-point polling processors queue receiver remote result ring routing samples satellite SDLC selected sequence numbers shown in Fig signal spectrum standard station statistical multiplexers STMPX switching synchronization T-carrier techniques telephone terminal token topology traffic transmission transmitted virtual circuit voice-grade