Digital Data Communications
This is a practical, non-mathematical introduction to data communications and is based on the author's belief that today's readers need not only a solid knowledge of how modern data communications technology operates, but also a firm grounding in how it has evolved, and where this evolution will likely take in the future. Topics are discussed at various points in the book in increasing complexity, helping the readers build a solid understanding of key communications. Coverage assumes prior knowledge of modulation, number systems, and digital circuits, and uses only the mathematics needed for understanding. Wherever possible, industry-wide standards rather than more limiting proprietary ones are used.
22 pages matching logic levels in this book
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ACIA ACIA's amplitude analog ASCII asynchronous communications bandwidth baud binary BISYNC byte of data cable called carrier Causes the modem CCITT Centronics channel chapter character character-oriented protocols clock divide clock signal communications link communications system connected control register converts Data bit data communications data compression data line data word demodulator devices diagram dial EBCDIC electronic equipment error Ethernet FDDI Figure frame frequency full-duplex half-duplex HDLC IEEE input intelligence signal interrupt ISDN layer logic levels loop Mb/s medium mode modem modem standards node office switch operate OSI Model output parity bit phase point-to-point poll printer protocol pulse modulation quantizing receiving terminal routers sampling secondary sent serial data shift register status bit status register stop bit synchronous telephone circuit telephone line telset tion Token Ring topology transfer transmission transmit data types voltage