Principles of Digital Communication Systems & Computer Networks is designed as a textbook for courses on digital communication systems, data communication, computer networks, and mobile computing. Part I deals with key topics such as information theory, transmission media, coding, error correction, multiplexing, multiple access, carrier modulation, PSTN, and radio communication. Part II goes on to cover the networking concepts, the ISO/OSI protocol architecture, Ethernet LAN, X.25 protocol, and TCP/IP protocol. Finally, Part III covers mobile computing, including radio paging, cellular mobile, GPS, CTI, unified messaging, and multimedia communication. Helpful summaries, lists of supplementary information, references, and exercises at the end of each chapter make the book a comprehensive resource for anyone pursuing a career in telecommunications and data communication. · Provides comprehensive coverage of digital communication, data communication protocols, and mobile computing · Covers digital communications systems, data communication protocols, computer networking, mobile computing, and convergence technologies, including PSTN, RS232, Signaling System No. 7, ISDN, Frame Relay, WAP, 3G Networks, and Radio Paging · Features a glossary of important terms, a dictionary of common acronyms, as well as references, review questions, exercises, and projects for each chapter · "In Brief" and "Notes" sections provide handy, at-a-glance information · Includes diagrams and other visual aids to reinforce textual descriptions and analyses