Also, the operators see NFV as highly complementary to SDN (Software Defined Networking). They are mutually beneficial technologies but are not dependent on each other; network functions can be virtualized and deployed without SDN being required and vice versa, according to the white paper.
The operators saw the need for something to happen quickly, and drove the vendors a little harder, according to Tilley.
"It was a wake-up call. But then we rapidly joined with them and embraced their ideas," Tilley said.
This is a big change for the operators, and it will take time before they start taking the leap to NFV-based networks.
"We see live networks happening in 2015," Tilley said.
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