IMS 101: What You Need To Know Now

Waclawsky, John
June 2005
Business Communications Review;Jun2005, Vol. 35 Issue 6, p18
Trade Publication
The article presents information on the IP or Internet Multimedia Subsystem (IMS). The IMS is a collection of carrier network functions and processes. The IMS standards promise an operator-friendly environment for real-time, packet-based calls and services that not only will preserve traditional carrier controls over user signaling and usage-based billing, but also will generate new revenue through deep packet inspection of protocols, URI and content. IMS was conceived for the evolution of cellular telephony networks, but the benefits of user signaling and billing controls have attracted the endorsement and involvement of wireline network operators and standards makers, including the European Telecommunications Standards Institute, the U.S.-based Alliance for Telecommunications Industry Solutions and the UN-sponsored International Telecommunication Union. As an architecture, IMS decomposes current and future networking devices into a plethora of functions, joined to one another conceptually by reference points. Some of these functions have been specified, while others are still under development for one of 3GPP's numbered UMTS Releases.


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