If your work involves the development and operation of voice or data networks, SIP (Session Initiation Protocol) is beginning to change the way you do business. Here's a ground-breaking book that quickly gives you a thorough understanding of this revolutionary protocol for IP Telephony. It shows how SIP provides a highly-scalable and cost-effective way to offer new and exciting telecommunication feature sets, helping you design your "next generation" network and develop new applications and software stacks.

Discussions include SIP as a key component in the Internet multimedia conferencing architecture, request and response messages, devices in a typical network, types of servers, SIP headers, comparisons with existing signaling protocols including H.323, related protocols SDP (Session Description Protocol) and RTP (Real-time Transport Protocol), and the future direction of SIP. Detailed call flow diagrams illustrate how this technology works with other protocols such as H.323 and ISUP.

About the Author

Alan B. Johnston is an advisory engineer at WorldCom and an adjunct at Washington University. He holds a B.E.(Hons) in electrical and electronic engineering from the University of Melbourne, Australia and a Ph.D. in electrical engineering from Lehigh University.

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