3.5 Economic investment plan models used by countries experienced in the transition to NGNs
3.5.1 Current studies and country cases regarding economic investment plan models for NGN migration
There are a number of approaches to the investment plan model for transition to NGNs, but four of these predominate, in the light of the experiences of countries that have already migrated from traditional networks to NGN. These approaches are those based on:
public investment;
public-private partnerships;
mutualization of private financing or private co-finance;
private investment through competition.