What's an IMS?

I was in a discussion yesterday with a group of people talking about IMS, which is the latest addition to the 3G network. It doesn't matter, for now, if you don't know what an IMS is...

According to the IMS product guy in the group, it's an "enabling technology". According to the IP guys who were present, it's a "applications router". According to the software people, it's really "a network operating system". According to the marketing guy, it doesn't really matter, "as long as we can brand it".

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