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| PLEN | |
| Q4/3 | Regional studies for the development of cost models together with related economic and policy issues |
| Q5/3 | Terms and definitions for Recommendations dealing with tariff and accounting principles together with related economic and policy issues |
| WP1/3 | |
| Q1/3 | Development of charging and accounting/settlement mechanisms for international telecommunications services using the Next Generation Networks (NGNs), future networks, and any possible future development, including adaptation of existing D-series Recommendations to the evolving user needs |
| Q6/3 | International Internet Connectivity including relevant aspects of IP peering, regional traffic exchange points, cost of provision of services and impact of transition from IPv4 to IPv6 |
| WP2/3 | |
| Q2/3 | Development of charging and accounting/settlement mechanisms for international telecommunications services, other than those studied in Question 1/3, including adaptation of existing D-series Recommendations to the evolving user needs |
| Q7/3 | International Mobile Roaming issues (including charging, accounting and settlement mechanisms and roaming at border areas) |
| WP3/3 | |
| Q3/3 | Study of economic and policy factors relevant to the efficient provision of international telecommunication services |
| Q8/3 | Alternative Calling Procedures and Misappropriation and Misuse of facilities and services including CLI, CPND and OI. |
| Q9/3 | Economic and regulatory impact of the Internet, convergence (services or infrastructure) and new services, such as OTT, on international telecommunication services and networks |
| Q10/3 | Definition of relevant markets, competition policy and identification of operators with SMP as it relates to the economic aspects of the international telecommunication services and networks |
| Regional groups | |
| SG3RG-AFR | Regional Group for Africa |
| SG3RG-AO | Regional Group for Asia and Oceania |
| SG3RG-ARB | Regional Group for the Arab region |
| SG3RG-LAC | Regional Group for Latin America and the Caribbean |
| SG3RG-RCC/CIS | Regional Group for RCC/CIS |
| Focus Groups | |
| FG-CD | ITU-T Focus Group on cost models for affordable data services (FG-CD) |
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