Emerging uses of SIP in service provider networks

✍ Scribed by Guy J. Zenner; Mark H. Jones; Amit A. Patel

• Publisher: Institute of Electrical and Electronics Engineers
• Year: 2003
• Tongue: English
• Weight: 239 KB
• Volume: 8
• Category: Article
• ISSN: 1089-7089
• DOI: 10.1002/bltj.10046

✦ Synopsis

The session initiation protocol (SIP) has emerged as a viable protocol for providing numerous services within today's networks. SIP was closely modeled after http to make it an easily extensible protocol that could provide connectivity in new converged Internet protocol (IP) networks. The inherent extensibility of SIP has allowed SIP to be used in many ways not envisioned by its creators. What started as a simple protocol for setting up a media stream between two endpoints has since found numerous seemingly unrelated uses. With many solutions using SIP being proposed and implemented, it is often hard to determine how best to use SIP for a particular solution. The purpose of this paper is to give the reader a framework for categorizing various SIP capabilities through the concept of usage models and to help the reader understand the various ways SIP can be used in both evolutionary and revolutionary ways in real-world networks. This paper assumes the reader has a basic understanding of SIP and its inner workings.