To ensure NGN migration effectively, several standard organizations are working on interoperability issues. These organizations are as follows.
1. the European Telecommunications Standards Institute (ETSI) – specifically TISPAN (the Telecoms and Internet Converged Services and Protocols for Advanced Networks)
2. the ITU Standardization Bureau (ITU-T) – specifically NGN-GSI (NGN Global Standards Initiative)
3. the 3rd Generation Partnership Project (3GPP)
4. the Fixed Mobile Convergence Forum
There are also many organizations such as the European Regulators Group (ERG), the European Conference of Postal and Telecommunications Administrations (CEPT), ITU and OECD, which are currently engaged in IP and NGN policy and regulatory research.
Source: Trends in Telecommunication Reform 2007: The Road to Next-Generation Networks (NGN)
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