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IMS Application Developer's Handbook by Mats Stille, Anders Ryde, Ioannis Fikouras, Catherine Mulligan, Ulf Olsson, Rogier Noldus

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Chapter 14. Future Outlook
Market and Technology

14.1. What is Next in Store for IMS?

As we have discussed before, IMS is essentially the way the telecommunications industry has agreed to embrace IP technology, choosing SIP as the basic control machinery, wrapping it in an architecture that delivers the multi-operator and multi-vendor properties expected, and ensuring that it allows efficient interoperability with the existing networks supporting billions of legacy devices. It is in this light we can see IMS as being the basis for the next generation of fixed telephony networks (replacing aging switching and access technology), as well as being the natural choice for voice services over LTE (known as VoLTE; fundamentally based on IP paradigms). ...

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