(This book describes the primary characteristics of the Internet and IP, including packet loss and delay jitter, and allows the reader to understand the role of digital signal managers (DSPs) and speech encoders in VoIP. This book also tells the reader about how to build the channel with the service provider through ISDN, xDSL, HFC local loop or other paths, as well as the current primary IP telephony protocol. The coverage of this book includes: a comprehensive solution for VoIP; the effects of VoIP gateways and gatekeepers; signaling No. 7 (SS7) and the interworking of IP, H.323; protocols that support VoIP multicast (IGMP and MBONE) , bandwidth reservation protocols (RSVP, RTP, RTCP) and security services. This book is a middle and high-end textbook. Whether you are evaluating VoIP technology or using VoIP technology, this book can deliver the information you need to understand deeply, just like a world-class expert in your around.)
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