Coverage of the various protocols that enable voice over IP, particularly H.323 and Session Initiation Protocol (SIP), simultaneously clear and deep. There are even some practical material; concluding chapter diagram Cisco router configurations for voice traffic and improve solutions with case studies. You will love this book if you need to implement voice over IP system and know more about IP than you do about traditional voice telecommunications. The patient and detailed explanations of the concepts of traditional telephone and voice over IP protocols will mesh well with existing data communications knowledge, enabling you to create and design products Wall wise decision. - David Covered topics: Public Switched Telephone Network (PSTN), signaling specifications (including Bell System, ISDN, and Signaling System 7), the basics of Internet Protocol (IP), voice modulation and compression, Quality of Service (QoS), H 0.323, Session Initiation Protocol (SIP), and protocol gateway.