Providing an accessible tutorial on telecommunications and network technologies, this book emphasizes the relationship between voice and data. This edition has been substantially updated to reflect the latest cellular and mobile technologies, including OFDM, IPv6, WCDMA, SD-CDMA, 4G, WiMAX, QoS, MPLS, unified messaging, IP telephony, and residential convergence (smart home technology). It also features new chapters on network management and security, and digital media. The authors cover a range of topics, from circuit switching and packet switching technologies to wireless and video technologies. Based on an actual course, the book provides PowerPoint slides, problems, and a detailed syllabus for qualifying instructors.