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Preface to the First Edition

Preface to the Third Edition

When 3GPP started standardizing the IMS a few years ago, most analysts expected the number of IMS deployments to grow dramatically as soon the initial IMS specifications were ready (3GPP Release 5 was functionally frozen in the first half of 2002 and completed shortly after that). While those predictions have proven to be too aggressive owing to a number of upheavals hitting the ICT (Information and Communications Technologies) sector, we are now seeing more and more commercial IMS-based service offerings in the market. At the time of writing (May 2008), there are over 30 commercial IMS networks running live traffic, adding up to over 10 million IMS users around the world; the IMS is being deployed globally. In addition, there are plenty o....


  

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