This book is like a good tour guide.It doesn't just describe the major attractions; you share in the history, spirit, language, and culture of the place. –Henning Schulzrinne, Professor, Columbia University Since its birth in 1996, Session Initiation Protocol (SIP) has grown up. As a richer, much more robust technology, SIP today is fully capable of supporting the communication systems that power our twenty-first century work and life. This second edition handbook has been revamped to cover the...
