On an EU level, the debate remains focused primarily on the implementation of the new regulatory framework, rather than an NGN-specific solution. In the US, the debate focuses on Net neutrality and a "regulation-light" approach seems to have gained the upper hand.

Bieler said the key regulatory issues surround numbering, law enforcement (that's bugging) and universal services.

"NGNs will no doubt have fundamental implications for business models and pricing," he said.

"But the most challenging task could turn out to be bringing together the worlds of IT and telecommunications."