Principles Digital Communication System & Computer Networks is designed as a textbook for courses on digital communications systems, data communications, computer networks, and mobile computing. Finally, Part III covers mobile computing, including radio paging, cellular, GPS, CTI, unified messaging, and multimedia communications. Provides comprehensive coverage of digital communications, data communications protocols, and mobile computing Include digital communication systems, data communication protocols, computer networks, mobile computing, and technology convergence, including PSTN, RS232, Signaling System No.