Internet Communications Using Sip: Delivering Voip and Multimedia Services with Session Initiation Protocol

This is a great place to start to give you perspective before you dig into the RFCs. Or if you never intend to read the RFCs, this book will give you enough of an understanding of some of the fundamental technology so that you'll be able to follow some of the deeper issues of SIP. Well written too.

A highly recommended book for newcomers to SIP as well as SIP experts. What I liked about the book was updated information on supplementary SIP technologies like PINT, SPIRITS, security et al. It has a very brief yet pertinent introduction to such areas. A very good companion to 'Understanding SIP'.

I'll keep it short and sweet. I am one of the authors of SIP andof many of its related technologies that are discussed in this book. As such, I am frequently asked by people how theycan quickly understand the benefits of SIP technology, whyit is important to them, and what it can enable. The answer issimple - read the Sinnreich/Johnston book. The book helps youunderstand how SIP, its extensions, and related technologiesall fit together, and why SIP is revolutionizing communications.This is a fabulous piece of work, written by two recognizedleaders. I highly recommend it.

I've been involved in the development of the SIP specification for several years, and currently co-chair the Internet Working Groups overseeing its continued evolution. I'm closely involved with the application of SIP to next-generation mobile phone networks. Between standards work and speaking on SIP frequently at trade shows and conferences I've seen a lot of SIP books and tried to explain SIP to many people. Most of the books on SIP cover the dry technical details of the specification and implementations. This book, "Internet Communications Using SIP" goes into an entirely different realm. Henry Sinnreich and Alan Johnston are two of the most knowledgeable authorities and notable figures in the SIP world. I expected a lot from them them. They've greatly exceeded my expectations, doing a surprisingly good job of explaining WHY the SIP protocol works the way it does, WHAT sort of advanced services it is making possible, and HOW service providers can use it to enrich their business offerings. This book is an absolute "must read" for anyone in the industry, especially for people familiar with traditional telephony who are trying to design, market, or implement new telecom services of any kind. If you haven't read this book and Gonzalo Camarillo's new SIP book, don't argue with the old-timers on the SIP mailing lists -- they're likely to just tell you to "RTFB" . . . and this is one of the books they're referring to.

However impossible it sounds, the authors succeeded in capturing all essential aspects of SIP telephony.Application creation, integrating with Internet services,issues that are still on the agenda -- all that is covered in a comprehensive manner.