This means that implementing
IMS architecture is not as simple as installing a few pieces of equipment and
plugging them in. There is a lot of interworking that will be required as with any new
technology.
Despite what many of the non-technical ???marketers??? may be trumpeting, the IMS
will not replace existing infrastructure overnight. We will not wake up one day and
40 Chapter 2
suddenly be able to use our mobile phones as powerful multimedia devices connecting
us to anyone anywhere in the world at the touch of a button.
Instead, we will find ourselves relying on the same devices we use right now, with
some new features and capabilities gradually (year by year) entering our daily lives.
Operators will transition their networks to IMS rather than simply replace everything
from scratch. There are numerous factors for this.
First of all, there is simply too much investment in all that equipment out there. This
equipment has not even paid for itself yet (at least not in accounting terms). Most operators
are not willing to write their investments off for at least 10 to 15 years. Second,
there is no business case to simply start over with IMS. IMS does not provide any new
services or killer applications.
Rather, IMS enables new services and applications by providing the infrastructure
that provides more robust control and management than the Internet does today.
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