The term “Next Generation Networks” is seemingly very broad indeed. Almost any
development in networking could potentially be placed under this banner. In fact, the
definition used by ETSIÂ’s NGN Starter Group places the emphasis on providing operators
with a step-by-step manner to create, deploy and manage innovative services.
However, NGN is more commonly associated with voice – a vision for the future of
packet-based voice networks as part of the evolution from todayÂ’s TDM circuit switched
voice. This makes sound commercial and technical sense. For the majority of operators
offering a mix of voice and data services, voice is still contributing over 80% of
revenues. Besides, data networks have embraced the requirements of packet-based
networks from the outset.
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