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SIP: Creating Next-Generation Telecom Applications

Posted by michael on from the fun-with-java dept.

An anonymous reader writes "In this article, you'll discover how the Session Initiation Protocol (SIP) operates and, building on that knowledge, you will learn how to use the Java SIP Servlet API to build new applications that can run on telecommunications networks. The SIP tour concludes with code examples that demonstrate SIP application development in action."

3 of 18 comments (clear)

  1. When all you have is a hammer.... by Anonymous Coward · · Score: 2, Insightful

    Excellent! A derivative of a non-real time, bulk data transfer protocol family (SMTP, HTTP) being used for real time signalling applications.

    While the HTTP request/response model has served the IETF well enough for many things, perhaps they should consider more protocol models than the single hammer they seem to have equipped their toolbox with.

    1. Re:When all you have is a hammer.... by isj · · Score: 2, Interesting

      First, IETF does not really control the standards. The standard committees and the working groups do. If a working group prefers HTTP request/response then so be it.

      Second, SIP was developed when HTTP request/response seemed like the new way of doing a lot of stuff. It has disadvantages (verbose, textual, lot of cruft you don't need) and advantages (already specified, clear way of extending it, MIME support)

      Third, SIP and other protocols used/specified by the telecom industry tend to have layer upon layer. If 1 layer is good, then 10 layers must be ten times as good. Have fun looking at OSP (Open Settlement Protocol)

  2. Yes... by 4of12 · · Score: 3, Interesting

    Another great contribution to providing free public documentation by IBM. Kudoes to them.

    Meanwhile, there's that oncoming train about states requiring VoIP providers to become fully bureaucratically functional telephone providers....

    A good dose of well-meaning out-dated regulation ought to slow down the adoption rate of good new technology.

    --
    "Provided by the management for your protection."